CN114754350A - Heat recovery system, method and device - Google Patents
Heat recovery system, method and device Download PDFInfo
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- CN114754350A CN114754350A CN202210227607.8A CN202210227607A CN114754350A CN 114754350 A CN114754350 A CN 114754350A CN 202210227607 A CN202210227607 A CN 202210227607A CN 114754350 A CN114754350 A CN 114754350A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/50—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers for draining or expelling water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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- Water Supply & Treatment (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The embodiment of the invention provides a heat recovery system, a method and a device, wherein the heat recovery system comprises: the system comprises an atmospheric flash tank, a high-energy water waste heat recovery heat exchanger group and a condenser; the high-energy water waste heat recovery heat exchanger group is connected with the condenser; the atmosphere flash tank is used for releasing high-energy water so that the high-energy water enters the high-energy water waste heat recovery heat exchanger group; the high-energy water waste heat recovery heat exchanger group is used for carrying out waste heat recovery on high-energy water, releases the drained water after heat dissipation, so that the drained water enters the condenser, the condenser condenses the drained water into condensed water, water quality can be improved, water sources and heat energy are saved, and engineering efficiency is improved.
Description
Technical Field
The invention relates to the technical field of energy recovery, in particular to a heat recovery system, method and device.
Background
At present, a supercritical once-through boiler is mostly adopted in domestic large thermal power generating units, and in order to prevent the overtemperature of a water cooling wall, the minimum flow of water flow on the boiler must be ensured, and the normal liquid level of a steam-water separator is maintained. In the boiler blowing pipe stage of a newly-built unit, the unit is not vacuumized, and after a large amount of high-temperature drainage enters a condenser, the temperature of the condensation water is increased, so that the fine treatment cannot be put into the unit, the water quality is seriously influenced, the water source is wasted, and the engineering efficiency is low; during unit start-up or low-load operation, the condenser is vacuum state, and the hydrophobic direct entering condenser of a large amount of high temperature boiler though can guarantee that the condensate temperature is not super, but the hydrophobic direct mixing of high temperature and low temperature condensate has the unmatched problem of energy utilization, has caused the waste of heat energy.
Disclosure of Invention
An object of the present invention is to provide a heat recovery system, which can improve water quality, save water source and heat energy, and improve engineering efficiency. It is another object of the present invention to provide a heat recovery method. It is a further object of the present invention to provide a heat recovery device. It is a further object of this invention to provide a computer readable medium. It is a further object of the present invention to provide a computer apparatus.
In order to achieve the above object, an aspect of the present invention discloses a heat recovery system, including: the system comprises an atmospheric flash tank, a high-energy water waste heat recovery heat exchanger group and a condenser; the high-energy water waste heat recovery heat exchanger group is connected with the condenser;
the atmosphere flash tank is used for releasing high-energy water so that the high-energy water enters the high-energy water waste heat recovery heat exchanger group;
the high-energy water waste heat recovery heat exchanger group is used for carrying out waste heat recovery on high-energy water, releasing the drained water after heat dissipation, enabling the drained water to enter the condenser, and enabling the condenser to condense the drained water into condensed water.
Preferably, the system further comprises: a boiler drain pump and a drain outlet valve; the atmospheric flash tank is connected with the high-energy water waste heat recovery heat exchanger group through a boiler drain pump;
the boiler drainage pump provides drainage power for conveying high-energy water;
the drain outlet valve is arranged on a connecting pipeline between the boiler drain pump and the high-energy water waste heat recovery heat exchanger group and used for controlling the delivery of the high-energy water.
Preferably, the system further comprises: a fine processing device; the condenser is connected with the fine processing device;
the fine treatment device is used for performing fine treatment on the condensed water released by the condenser and releasing the condensed water after the fine treatment.
Preferably, the system further comprises: a low-pressure regenerative heater group and a deaerator; the fine processing device is connected with the low-pressure regenerative heater group, and the low-pressure regenerative heater group is connected with the deaerator;
the low-pressure heat regenerative heater group is used for heating the condensate after the fine treatment, and conveying the heated condensate to the deaerator through the connecting pipeline so as to deaerate the heated condensate.
Preferably, the system further comprises: a condensate pump; the condenser is connected with the fine processing device through a condensate pump;
the condensate pump provides power for conveying condensate.
Preferably, the system further comprises: the bypass valve group comprises a first bypass valve, a second bypass valve, a third bypass valve, a fourth bypass valve and a fifth bypass valve;
the low-pressure regenerative heater group comprises a first low-pressure heater, a second low-pressure heater, a third low-pressure heater and a fourth low-pressure heater;
the first bypass valve is arranged on a connecting pipeline of the fine processing device and the first low-pressure heater and used for controlling the delivery of the condensed water;
the second bypass valve is arranged on a connecting pipeline between the first low-pressure heater and the second low-pressure heater and used for controlling the delivery of condensed water;
the third bypass valve is arranged on a connecting pipeline between the second low-pressure heater and the third low-pressure heater and used for controlling the delivery of the condensed water;
the fourth bypass valve is arranged on a connecting pipeline between the third low-pressure heater and the fourth low-pressure heater and used for controlling the delivery of condensed water;
and the fifth bypass valve is arranged on a connecting pipeline between the fourth low-pressure heater and the deaerator and used for controlling the delivery of the condensed water.
Preferably, the high-energy water waste heat recovery heat exchanger group comprises a first waste heat recovery heat exchanger, a second waste heat recovery heat exchanger, a third waste heat recovery heat exchanger, a fourth waste heat recovery heat exchanger and a fifth waste heat recovery heat exchanger, and each waste heat recovery heat exchanger in the high-energy water waste heat recovery heat exchanger group comprises a heat release side;
the boiler drain pump is connected with the heat release side of the first waste heat recovery heat exchanger;
the heat release side of the first waste heat recovery heat exchanger is connected with the heat release side of the second waste heat recovery heat exchanger;
the heat release side of the second waste heat recovery heat exchanger is connected with the heat release side of the third waste heat recovery heat exchanger;
the heat release side of the third waste heat recovery heat exchanger is connected with the heat release side of the fourth waste heat recovery heat exchanger;
the heat release side of the fourth waste heat recovery heat exchanger is connected with the heat release side of the fifth waste heat recovery heat exchanger;
and the heat release side of the fifth waste heat recovery heat exchanger is connected with the condenser.
Preferably, the system further comprises: a main road valve group including a first main road valve, a second main road valve, a third main road valve, a fourth main road valve, a fifth main road valve, a sixth main road valve, a seventh main road valve, an eighth main road valve, a ninth main road valve, and a tenth main road valve;
each waste heat recovery heat exchanger in the high-energy water waste heat recovery heat exchanger group also comprises a heat absorption side;
the first main path valve is arranged on a connecting pipeline between the fine processing device and the heat absorption side of the first waste heat recovery heat exchanger and used for controlling the delivery of condensed water;
the second main path valve is arranged on a connecting pipeline between the heat absorption side of the first waste heat recovery heat exchanger and the first low-pressure heater and used for controlling the conveying of condensed water;
the third main path valve is arranged on a connecting pipeline between the first low-pressure heater and the heat absorption side of the second waste heat recovery heat exchanger and used for controlling the delivery of condensed water;
the fourth main circuit valve is arranged on a connecting pipeline between the heat absorption side of the second waste heat recovery heat exchanger and the second low-pressure heater and used for controlling the conveying of the condensed water;
the fifth main path valve is arranged on a connecting pipeline between the second low-pressure heater and the heat absorption side of the third waste heat recovery heat exchanger and used for controlling the delivery of condensed water;
the sixth main path valve is arranged on a connecting pipeline between the heat absorption side of the third waste heat recovery heat exchanger and the third low-pressure heater and used for controlling the delivery of condensed water;
the seventh main circuit valve is arranged on a connecting pipeline between the third low-pressure heater and the heat absorption side of the fourth waste heat recovery heat exchanger and used for controlling the delivery of condensed water;
the eighth main path valve is arranged on a connecting pipeline between the heat absorption side of the fourth waste heat recovery heat exchanger and the fourth low-pressure heater and used for controlling the delivery of the condensed water;
the ninth main path valve is arranged on a connecting pipeline between the fourth low-pressure heater and the heat absorption side of the fifth waste heat recovery heat exchanger and used for controlling the delivery of condensed water;
and the tenth main pipe valve is arranged on a connecting pipeline between the heat absorption side of the fifth waste heat recovery heat exchanger and the deaerator and used for controlling the delivery of the condensed water.
The invention also discloses a heat recovery method, which comprises the following steps:
when the boiler is in wet operation, the atmospheric flash tank is controlled to release high-energy water, the high-energy water enters the high-energy water waste heat recovery heat exchanger group, waste heat recovery is carried out on the high-energy water by the high-energy water waste heat recovery heat exchanger group, the drained water after heat dissipation is released, the drained water enters the condenser, and the drained water is condensed into condensed water by the condenser.
Preferably, control atmosphere flash vessel release high energy water for high energy water gets into high energy water waste heat recovery heat exchanger group, includes:
and controlling the opening of the drain outlet valve to enable the high-energy water released by the atmospheric flash tank to enter the high-energy water waste heat recovery heat exchanger group.
Preferably, the method further comprises:
when the boiler is in wet operation, the main path valve group is controlled to be opened, and the bypass valve group is controlled to be closed, so that condensed water released in the condenser enters the fine treatment device for fine treatment, and the condensed water after the fine treatment is heated and conveyed to the deaerator through the low-pressure regenerative heater group and the high-energy water waste heat recovery heat exchanger group.
Preferably, the method further comprises:
when the boiler is in dry operation, the boiler drain pump and the main path valve set are controlled to be closed, the bypass valve set is opened, so that condensed water released in the condenser enters the fine treatment device for fine treatment, and the condensed water after the fine treatment is heated by the low-pressure regenerative heater set and is conveyed to the deaerator.
The invention also discloses a heat recovery device, comprising:
the releasing unit is used for controlling the atmosphere flash tank to release high-energy water when the boiler operates in a wet state, enabling the high-energy water to enter the high-energy water waste heat recovery heat exchanger group, performing waste heat recovery on the high-energy water through the high-energy water waste heat recovery heat exchanger group, releasing the drained water after heat dissipation, enabling the drained water to enter the condenser, and condensing the drained water into condensed water through the condenser.
The invention also discloses a computer-readable medium, on which a computer program is stored which, when executed by a processor, implements a method as described above.
The invention also discloses a computer device comprising a memory for storing information comprising program instructions and a processor for controlling the execution of the program instructions, the processor implementing the method as described above when executing the program.
The heat recovery system of the present invention comprises: the system comprises an atmospheric flash tank, a high-energy water waste heat recovery heat exchanger group and a condenser; the high-energy water waste heat recovery heat exchanger group is connected with the condenser; the atmosphere flash tank is used for releasing high-energy water so that the high-energy water enters the high-energy water waste heat recovery heat exchanger group; the high-energy water waste heat recovery heat exchanger group is used for carrying out waste heat recovery on high-energy water, releases the drained water after heat dissipation, enables the drained water to enter the condenser, enables the condenser to condense the drained water into condensed water, can improve water quality, saves water sources and heat energy, and improves engineering efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a heat recovery system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a heat recovery method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a heat recovery device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to facilitate understanding of the technical solutions provided in the present application, the following first describes relevant contents of the technical solutions in the present application. At present, a supercritical once-through boiler is mostly adopted in a domestic large thermal power generating unit, and because the supercritical boiler does not have a fixed steam-water separation point, in order to prevent the overtemperature of a water wall during the starting process and the low-load operation of the boiler, the minimum flow of water flow on the boiler must be ensured, the normal liquid level of a steam-water separator is maintained, and the boiler is in a wet-state operation state at the moment. The steam generated by the boiler starting steam-water separator enters a boiler superheated steam system, and the generated drain water enters an atmospheric flash tank. And (4) draining water in the atmospheric flash tank, and returning the drained water to the condenser by a boiler drain pump.
Fig. 1 is a schematic structural diagram of a heat recovery system according to an embodiment of the present invention, as shown in fig. 1, the system includes: the system comprises an atmospheric flash tank 110, a high-energy water waste heat recovery heat exchanger group 120 and a condenser 130. The atmospheric flash tank 110 is connected with the high-energy water waste heat recovery heat exchanger group 120, and the high-energy water waste heat recovery heat exchanger group 120 is connected with the condenser 130. As shown in fig. 1, the high-energy water waste heat recovery heat exchanger group 120 is indicated by a dot-dash line, and the high-energy water waste heat recovery heat exchanger group 120 includes a plurality of waste heat recovery heat exchangers, each of which includes a heat-releasing side and a heat-absorbing side. Specifically, an outlet of the atmospheric flash tank 110 is connected to a heat release side inlet of the high-energy water waste heat recovery heat exchanger group 120, and a heat release side outlet of the high-energy water waste heat recovery heat exchanger group 120 is connected to an inlet of the condenser 130.
The atmospheric flash tank 110 is used to release high-energy water so that the high-energy water enters the high-energy water waste heat recovery heat exchanger group 120.
The high-energy water waste heat recovery heat exchanger group 120 is used for performing waste heat recovery on high-energy water, releasing the drained water after heat dissipation, so that the drained water enters the condenser 130, and the condensed water is condensed into condensed water by the condenser 130.
In the embodiment of the present invention, the system further includes: boiler drain pump 140 and drain outlet valve 150. Specifically, the atmospheric flash tank 110 is connected to the high-energy water heat recovery heat exchanger set 120 through a boiler drain pump 140 and a drain outlet valve 150. Specifically, the outlet of the atmospheric flash tank 110 is connected to the boiler drain pump 140, the boiler drain pump 140 is connected to the drain outlet valve 150, the drain outlet valve 150 is connected to the heat release side inlet of the high-energy water heat recovery heat exchanger unit 120, and the high-energy water released by the atmospheric flash tank 110 enters the high-energy water heat recovery heat exchanger unit 120 through the boiler drain pump 140 and the drain outlet valve 150.
The drain outlet valve 150 is disposed on a connection pipeline between the boiler drain pump 140 and the high-energy water waste heat recovery heat exchanger group 120, and is used for controlling the delivery of the high-energy water.
In the embodiment of the present invention, the system further includes: a polishing device 160. The condenser 130 is connected to the polishing apparatus 160. Specifically, an outlet of the condenser 130 is connected to an inlet of the polishing apparatus 160.
The fine processing device 160 is configured to perform fine processing on the condensed water released by the condenser 130, and release the condensed water after the fine processing.
In the embodiment of the invention, the fine treatment device 160 is a condensate fine treatment device which is an important auxiliary device of a large-scale unit steam drum boiler and a once-through boiler, and the safe and stable operation of the device plays a key role in the feed water quality of the boiler. The condensate fine treatment device adopts a filtering and mixed bed treatment mode, the quality of the output condensate is more stable, and the influence of blockage on a filter screen at the inlet of the water supply pump is reduced.
In an embodiment of the present invention, the system further includes: a low pressure regenerative heater bank 170 and a deaerator 180. The finishing device 160 is connected with a low-pressure regenerative heater group 170, and the low-pressure regenerative heater group 170 is connected with a deaerator 180. As shown in fig. 1, a low pressure regenerative heater bank 170 is shown in phantom, the low pressure regenerative heater bank 170 including a plurality of low pressure regenerative heaters. Specifically, the outlet of the finishing device 160 is connected to the inlet of the low-pressure regenerative heater group 170, and the outlet of the low-pressure regenerative heater group 170 is connected to the inlet of the deaerator 180.
The low-pressure regenerative heater group 170 is used for heating the condensate after the fine treatment, and conveying the heated condensate to the deaerator 180 through a connecting pipeline, so that the deaerator 180 deaerates the heated condensate. The deaerator 180 is one of the key equipment of the boiler and the heating system, removes oxygen and other gases dissolved in the feed water, and prevents and reduces corrosion of the boiler feed water pipe, the economizer and other accessory equipment.
In the embodiment of the present invention, the system further includes: a condensate pump 190. The condenser 130 is connected to the polishing apparatus 160 via a condensate pump 190. Specifically, the outlet of the condenser 130 is connected to the inlet of the polishing apparatus 160 via a condensate pump 190.
The condensate pump 190 provides power for delivering condensate from the outlet of the condenser 130 to the inlet of the treated plant 160.
In the embodiment of the present invention, the system further includes: a bypass valve group comprising a first bypass valve 201, a second bypass valve 202, a third bypass valve 203, a fourth bypass valve 204 and a fifth bypass valve 205. The low-pressure regenerative heater group 170 includes a first low-pressure heater 171, a second low-pressure heater 172, a third low-pressure heater 173, and a fourth low-pressure heater 174.
In the embodiment of the present invention, the first bypass valve 201 is disposed on the connection pipeline between the fine processing device 160 and the first low pressure heater 171, and is used for controlling the delivery of the condensed water. Specifically, the outlet of the finisher 160 is connected to one end of a first bypass valve 201, and the other end of the first bypass valve 201 is connected to the inlet of the first low-pressure heater 171.
In the embodiment of the present invention, the second bypass valve 202 is disposed on the connection pipe between the first low pressure heater 171 and the second low pressure heater 172, and is used for controlling the delivery of the condensed water. Specifically, the outlet of the first low pressure heater 171 is connected to one end of the second bypass valve 202, and the other end of the second bypass valve 202 is connected to the inlet of the second low pressure heater 172.
In the embodiment of the present invention, the third bypass valve 203 is disposed on the connection pipe between the second low pressure heater 172 and the third low pressure heater 173 for controlling the delivery of the condensed water. Specifically, the outlet of the second low pressure heater 172 is connected to one end of the third bypass valve 203, and the other end of the third bypass valve 203 is connected to the inlet of the third low pressure heater 173.
In the embodiment of the present invention, a fourth bypass valve 204 is disposed on a connection pipe between the third low pressure heater 173 and the fourth low pressure heater 174 for controlling the delivery of the condensed water. Specifically, the outlet of the third low pressure heater 173 is connected to one end of a fourth bypass valve 204, and the other end of the fourth bypass valve 204 is connected to the inlet of the fourth low pressure heater 174.
In the embodiment of the present invention, a fifth bypass valve 205 is disposed on the connection pipe between the fourth low pressure heater 174 and the deaerator 180, and is used for controlling the delivery of the condensed water. Specifically, the outlet of the fourth low pressure heater 174 is connected to one end of a fifth bypass valve 205, and the other end of the fifth bypass valve 205 is connected to the inlet of the deaerator 180.
In the embodiment of the present invention, the high-energy water waste heat recovery heat exchanger group 120 includes a first waste heat recovery heat exchanger 121, a second waste heat recovery heat exchanger 122, a third waste heat recovery heat exchanger 123, a fourth waste heat recovery heat exchanger 124, and a fifth waste heat recovery heat exchanger 125, and each waste heat recovery heat exchanger in the high-energy water waste heat recovery heat exchanger group 120 includes a heat-releasing side.
As shown in fig. 1, the boiler drain pump 140 is connected to the heat release side inlet of the first heat recovery heat exchanger 121; the heat release side outlet of the first waste heat recovery heat exchanger 121 is connected with the heat release side inlet of the second waste heat recovery heat exchanger 122; the heat release side outlet of the second heat recovery heat exchanger 122 is connected with the heat release side inlet of the third heat recovery heat exchanger 123; the heat release side outlet of the third waste heat recovery heat exchanger 123 is connected with the heat release side inlet of the fourth waste heat recovery heat exchanger 124; the heat release side outlet of the fourth heat recovery heat exchanger 124 is connected with the heat release side inlet of the fifth heat recovery heat exchanger 125; the heat release side outlet of the fifth waste heat recovery heat exchanger 125 is connected to the condenser 130.
In the embodiment of the present invention, the system further includes: the main valve group comprises a first main valve 211, a second main valve 212, a third main valve 213, a fourth main valve 214, a fifth main valve 215, a sixth main valve 216, a seventh main valve 217, an eighth main valve 218, a ninth main valve 219 and a tenth main valve 220, and each waste heat recovery heat exchanger in the high-energy water waste heat recovery heat exchanger group further comprises a heat absorption side.
As shown in fig. 1, a first main valve 211 is disposed on a connection pipeline between the polishing apparatus 160 and the heat absorption side of the first heat recovery heat exchanger 121, and is used for controlling the delivery of the condensed water. Specifically, the fine processing device 160 is connected to one end of the first main path valve 211, and the other end of the first main path valve 211 is connected to the heat absorption side inlet of the first heat recovery heat exchanger 121.
The second main path valve 212 is disposed on a connection pipe between the heat absorption side of the first heat recovery heat exchanger 121 and the first low pressure heater 171, and is used to control the delivery of the condensed water. Specifically, the heat absorption side outlet of the first heat recovery heat exchanger 121 is connected to one end of a second main path valve 212, and the other end of the second main path valve 212 is connected to the inlet of the first low pressure heater 171.
The third main valve 213 is disposed on a connection pipe between the first low pressure heater 171 and the heat absorption side of the second heat recovery heat exchanger 122, and is used to control the delivery of the condensed water. Specifically, the outlet of the first low pressure heater 171 is connected to an end of a third main path valve 213, and the other end of the third main path valve 213 is connected to a heat absorption side inlet of the second heat recovery heat exchanger 122.
The fourth main valve 214 is disposed on the connection pipe between the heat absorption side of the second heat recovery heat exchanger 122 and the second low-pressure heater 172, and is used for controlling the delivery of the condensed water. Specifically, the heat absorption side outlet of the second heat recovery heat exchanger 122 is connected to one end of a fourth main path valve 214, and the other end of the fourth main path valve 214 is connected to the inlet of the second low pressure heater 172.
A fifth main circuit valve 215 is provided on the connection pipe between the second low pressure heater 172 and the heat absorption side of the third heat recovery heat exchanger 123, for controlling the delivery of the condensed water. Specifically, the outlet of the second low pressure heater 172 is connected to one end of a fifth main path valve 215, and the other end of the fifth main path valve 215 is connected to the heat absorption side inlet of the third heat recovery heat exchanger 123.
The sixth main circuit valve 216 is disposed on the connection pipe between the heat absorption side of the third heat recovery heat exchanger 123 and the third low-pressure heater 173, and is configured to control the delivery of the condensed water. Specifically, the heat absorption side outlet of the third heat recovery heat exchanger 123 is connected to one end of a sixth main path valve 216, and the other end of the sixth main path valve 216 is connected to the inlet of the third low pressure heater 173.
The seventh main valve 217 is disposed on a connection pipe between the third low pressure heater 173 and the heat absorption side of the fourth heat recovery heat exchanger 124, and is configured to control the delivery of the condensed water. Specifically, an outlet of the third low pressure heater 173 is connected to one end of a seventh main path valve 217, and the other end of the seventh main path valve 217 is connected to a heat absorption side inlet of the fourth heat recovery heat exchanger 124.
An eighth main circuit valve 218 is disposed on a connection pipe between the heat absorption side of the fourth heat recovery heat exchanger 124 and the fourth low pressure heater 174, and is used for controlling the delivery of the condensed water. Specifically, the heat absorption side outlet of the fourth heat recovery heat exchanger 124 is connected to one end of an eighth main path valve 218, and the other end of the eighth main path valve 218 is connected to the inlet of the fourth low pressure heater 174.
A ninth main pipe valve 219 is provided on the connection pipe between the fourth low pressure heater 174 and the heat absorption side of the fifth heat recovery heat exchanger 125, for controlling the delivery of the condensed water. Specifically, the outlet of the fourth low pressure heater 174 is connected to one end of a ninth main path valve 219, and the other end of the ninth main path valve 219 is connected to the heat absorption side inlet of the fifth heat recovery heat exchanger 125.
The tenth main way valve 220 is disposed on a connection pipeline between the heat absorption side of the fifth waste heat recovery heat exchanger 125 and the deaerator 180, and is configured to control delivery of condensed water. An outlet of the heat absorption side of the fifth waste heat recovery heat exchanger 125 is connected to one end of a tenth main path valve 220, and the other end of the tenth main path valve 220 is connected to an inlet of the deaerator 180.
In the embodiment of the invention, the atmospheric flash tank 110 releases high-energy water, the high-energy water sequentially passes through the boiler drain pump 140 and the drain outlet valve 150, enters the high-energy water waste heat recovery heat exchanger group 120 for heat exchange and releases the drained water after heat dissipation, the drained water after heat dissipation enters the condenser 130, the condenser 130 condenses the drained water into condensed water, the condensed water reaches the fine treatment device 160 through the condensed water pump 190 for fine treatment, the condensed water enters the low-pressure regenerative heater group 170 for heating after the water quality is improved, and the heated condensed water is conveyed to the deaerator 180 through the connecting pipeline so as to be deaerated by the deaerator 180 for the deaerator 180 to deaerate the heated condensed water.
In the technical scheme provided by the embodiment of the invention, the heat recovery system comprises: the system comprises an atmospheric flash tank, a high-energy water waste heat recovery heat exchanger group and a condenser; the atmospheric flash tank is connected with a high-energy water waste heat recovery heat exchanger group, and the high-energy water waste heat recovery heat exchanger group is connected with a condenser; the atmosphere flash tank is used for releasing high-energy water so that the high-energy water enters the high-energy water waste heat recovery heat exchanger group; the high-energy water waste heat recovery heat exchanger group is used for carrying out waste heat recovery on high-energy water, releases the drained water after heat dissipation, so that the drained water enters the condenser, the condenser condenses the drained water into condensed water, water quality can be improved, water sources and heat energy are saved, and engineering efficiency is improved.
It should be noted that the heat recovery system shown in fig. 1 is also applicable to the heat recovery method shown in fig. 2, and is not described herein again.
The following describes an implementation process of the heat recovery method provided by the embodiment of the present invention, taking a heat recovery device as an execution subject. It can be understood that the implementation subject of the heat recovery method provided by the embodiment of the invention includes, but is not limited to, a heat recovery device.
Fig. 2 is a flow chart of a heat recovery method according to an embodiment of the present invention, as shown in fig. 2, the method is applied during blowpipes of a boiler of a newly-built unit and during start-up and low-load operation of the unit, the boiler is in wet operation, and the method includes:
In the embodiment of the invention, the heat recovery device controls the opening of the drain outlet valve, so that high-energy water released by the atmospheric flash tank enters the high-energy water waste heat recovery heat exchanger group, passes through the first waste heat recovery heat exchanger, the second waste heat recovery heat exchanger, the third waste heat recovery heat exchanger, the fourth waste heat recovery heat exchanger and the fifth waste heat recovery heat exchanger in sequence for waste heat recovery, and releases drain after heat dissipation.
And 102, controlling to open the main valve group and close the bypass valve group, so that condensed water released from the condenser enters a fine treatment device for fine treatment, and the condensed water after the fine treatment is heated and conveyed to a deaerator through the low-pressure regenerative heater group and the high-energy water waste heat recovery heat exchanger group.
In the embodiment of the invention, the heat recovery device controls the opening of the main road valve group and the closing of the bypass valve group, so that the main road of the system runs, condensed water in the condenser enters the fine treatment device through the condensed water pump for fine treatment, and the condensed water released by the fine treatment device is the condensed water with qualified water quality.
Specifically, the condensed water after the fine treatment enters an inlet at the heat absorption side of a fifth waste heat recovery heat exchanger through a first main path valve, passes through the fifth waste heat recovery heat exchanger and is output through an outlet at the heat absorption side of the waste heat recovery heat exchanger; the output condensed water enters an inlet of the first low-pressure heater through the second main path valve, passes through the first low-pressure heater and then is output through an outlet of the first low-pressure heater; the output condensed water enters an inlet of a heat absorption side of the fourth waste heat recovery heat exchanger through a third main path valve, passes through the fourth waste heat recovery heat exchanger and is output through an outlet of the heat absorption side of the fourth waste heat recovery heat exchanger; the output condensed water enters the inlet of the second low-pressure heater through the fourth main path valve, passes through the second low-pressure heater and then is output through the outlet of the second low-pressure heater; the output condensed water enters an inlet at the heat absorption side of the third waste heat recovery heat exchanger through a fifth main path valve, passes through the third waste heat recovery heat exchanger and is output through an outlet at the heat absorption side of the third waste heat recovery heat exchanger; the output condensed water enters the inlet of the third low-pressure heater through the sixth main path valve, passes through the third low-pressure heater and then is output through the outlet of the third low-pressure heater; the output condensed water enters an inlet at the heat absorption side of the second waste heat recovery heat exchanger through a seventh main path valve, passes through the second waste heat recovery heat exchanger and is output through an outlet at the heat absorption side of the second waste heat recovery heat exchanger; the output condensed water enters the inlet of the fourth low-pressure heater through the eighth main path valve, passes through the fourth low-pressure heater and then is output through the outlet of the fourth low-pressure heater; the output condensed water enters an inlet of a heat absorption side of the first waste heat recovery heat exchanger through a ninth main path valve, passes through the first waste heat recovery heat exchanger and is output through an outlet of the heat absorption side of the first waste heat recovery heat exchanger; the output condensed water enters the deaerator through a tenth main path valve for deaerating treatment.
In the embodiment of the invention, during the period of blowing the boiler of the newly-built unit, the boiler drain water heats the temperature of the condensed water through the high-energy water waste heat recovery heat exchanger group, so that the heating steam quantity of the deaerator is reduced, and the heat economy is improved; meanwhile, due to the reduction of the drainage temperature of the boiler, the temperature of condensed water in the condenser is not over-temperature, the drainage of the boiler can be normally recovered, the drainage waste of the boiler is avoided, water resources are saved, the fine treatment can be normally put into use, the qualified water quality is ensured, and the safe operation of a unit is facilitated.
In the embodiment of the invention, when the unit is in the initial starting stage or in the low-load operation period, the boiler is in the wet operation, the condensed water is heated by each waste heat recovery heat exchanger group in the high-energy water waste heat recovery heat exchanger group in sequence, the step heating of the condensed water is realized, the drainage heat of the boiler is recovered, the low-pressure steam extraction amount of each stage is reduced, and the heat efficiency of the unit is improved.
Further, when the boiler operates in a dry state, the heat recovery device controls the boiler drain pump and the main valve set to be closed, the bypass valve set is opened, and the system bypasses operate, so that condensed water released in the condenser enters the fine treatment device to be subjected to fine treatment, and the condensed water subjected to fine treatment is heated by the low-pressure regenerative heater set and is conveyed to the deaerator. Wherein, the condensed water released by the fine processing device is the condensed water with qualified water quality.
Specifically, the condensed water after the fine treatment enters an inlet of a first low-pressure heater through a first bypass valve, passes through the first low-pressure heater and then is output through an outlet of the first low-pressure heater; the output condensed water enters the inlet of the second low-pressure heater through a second bypass valve, passes through the second low-pressure heater and then is output through the outlet of the second low-pressure heater; the output condensed water enters the inlet of the third low-pressure heater through a third bypass valve, passes through the third low-pressure heater and is output through the outlet of the third low-pressure heater; the output condensed water enters an inlet of a fourth low-pressure heater through a fourth bypass valve, passes through the fourth low-pressure heater and then is output through an outlet of the fourth low-pressure heater; and the output condensed water enters the deaerator through a fifth bypass valve for deaerating treatment.
In the embodiment of the invention, during the dry-state operation of the boiler, the system bypass in the heat recovery system operates, and the high-energy water waste heat recovery heat exchanger group stops operating, so that the resistance of the condensed water in the flowing process is reduced.
In the technical scheme of the heat recovery method provided by the embodiment of the invention, when the boiler is in wet operation, the atmosphere flash tank is controlled to release high-energy water, so that the high-energy water enters the high-energy water waste heat recovery heat exchanger group, the high-energy water waste heat recovery heat exchanger group is used for carrying out waste heat recovery on the high-energy water, the drained water after heat dissipation is released, the drained water enters the condenser, and the condenser condenses the drained water into condensed water, so that the water quality can be improved, the water source and the heat energy are saved, and the engineering efficiency is improved.
Fig. 3 is a schematic structural diagram of a heat recovery device according to an embodiment of the present invention, the heat recovery device is configured to perform the heat recovery method, and as shown in fig. 3, the heat recovery device includes: the unit 11 is released.
The release unit 11 is used for controlling the atmosphere flash tank to release high-energy water when the boiler is in wet operation, so that the high-energy water enters the high-energy water waste heat recovery heat exchanger group, the high-energy water waste heat recovery heat exchanger group performs waste heat recovery on the high-energy water, and the drained water after heat dissipation is released, so that the drained water enters the condenser, and the drained water is condensed into condensed water by the condenser.
In the embodiment of the present invention, the releasing unit 11 is specifically configured to control the drain outlet valve to open, so that the high-energy water released by the atmospheric flash tank enters the high-energy water waste heat recovery heat exchanger group.
In the embodiment of the present invention, the apparatus further includes: a control unit 12.
The control unit 12 is configured to control to open the main valve set and close the bypass valve set when the boiler operates in a wet state, so that condensed water released from the condenser enters the fine processing device for fine processing, and the condensed water after the fine processing is heated by the low-pressure regenerative heater set and the high-energy water waste heat recovery heat exchanger set and is conveyed to the deaerator.
In the embodiment of the present invention, the control unit 12 is further configured to control to turn off the boiler drain pump and the main valve group, and turn on the bypass valve group when the boiler is in a dry state operation, so that the condensed water released from the condenser enters the fine treatment device for fine treatment, and the fine-treated condensed water is heated by the low-pressure regenerative heater group and is conveyed to the deaerator.
In the scheme of the embodiment of the invention, when the boiler is in wet operation, the atmosphere flash tank is controlled to release high-energy water, so that the high-energy water enters the high-energy water waste heat recovery heat exchanger group, the high-energy water waste heat recovery heat exchanger group performs waste heat recovery on the high-energy water, the drained water after heat dissipation is released, the drained water enters the condenser, and the condenser condenses the drained water into condensed water, thereby improving the water quality, saving the water source and the heat energy and improving the engineering efficiency.
The systems, apparatuses, modules or units described in the above embodiments may be specifically implemented by a computer chip or an entity, or implemented by a product with certain functions. A typical implementation device is a computer device, which may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
Embodiments of the present invention provide a computer device, including a memory and a processor, where the memory is configured to store information including program instructions, and the processor is configured to control execution of the program instructions, and the program instructions are loaded by and executed by the processor to implement steps of embodiments of the heat recovery method.
Referring now to FIG. 4, shown is a block diagram of a computer device 600 suitable for use in implementing embodiments of the present application.
As shown in fig. 4, the computer apparatus 600 includes a Central Processing Unit (CPU)601 that can perform various appropriate jobs and processes according to a program stored in a Read Only Memory (ROM)602 or a program loaded from a storage section 608 into a Random Access Memory (RAM)) 603. In the RAM603, various programs and data necessary for the operation of the computer apparatus 600 are also stored. The CPU601, ROM602, and RAM603 are connected to each other via a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.
The following components are connected to the I/O interface 605: an input portion 606 including a keyboard, a mouse, and the like; an output portion 607 including a Cathode Ray Tube (CRT), a liquid crystal feedback (LCD), and the like, and a speaker and the like; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a LAN card, a modem, or the like. The communication section 609 performs communication processing via a network such as the internet. The driver 610 is also connected to the I/O interface 606 as needed. A removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 610 as necessary, so that a computer program read out therefrom is mounted as necessary on the storage section 608.
In particular, according to an embodiment of the present invention, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the invention include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 609 and/or installed from the removable medium 611.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
According to the technical scheme, the data acquisition, storage, use, processing and the like meet relevant regulations of national laws and regulations.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (15)
1. A heat recovery system, the system comprising: the system comprises an atmospheric flash tank, a high-energy water waste heat recovery heat exchanger group and a condenser; the atmospheric flash tank is connected with the high-energy water waste heat recovery heat exchanger group, and the high-energy water waste heat recovery heat exchanger group is connected with the condenser;
the atmospheric flash tank is used for releasing high-energy water, so that the high-energy water enters the high-energy water waste heat recovery heat exchanger group;
the high-energy water waste heat recovery heat exchanger group is used for carrying out waste heat recovery on high-energy water and releasing the drained water after heat dissipation, so that the drained water enters the condenser to be condensed into condensed water by the condenser.
2. The heat recovery system of claim 1, further comprising: a boiler drain pump and a drain outlet valve; the atmospheric flash tank is connected with the high-energy water waste heat recovery heat exchanger set through the boiler drain pump;
the boiler drainage pump provides drainage power for conveying the high-energy water;
the drain outlet valve is arranged on a connecting pipeline between the boiler drain pump and the high-energy water waste heat recovery heat exchanger group and used for controlling the delivery of high-energy water.
3. The heat recovery system of claim 1, further comprising: a fine processing device; the condenser is connected with the fine processing device;
the fine treatment device is used for performing fine treatment on the condensed water released by the condenser and releasing the condensed water after the fine treatment.
4. A heat recovery system in accordance with claim 3, further comprising: a low-pressure regenerative heater group and a deaerator; the fine processing device is connected with the low-pressure regenerative heater group, and the low-pressure regenerative heater group is connected with the deaerator;
and the low-pressure heat regenerative heater group is used for heating the condensed water after the fine treatment, and conveying the heated condensed water to the deaerator through a connecting pipeline so as to deaerate the heated condensed water by the deaerator.
5. A heat recovery system in accordance with claim 3, said system further comprising: a condensate pump; the condenser is connected with the fine processing device through the condensate pump;
the condensate pump provides power for conveying the condensate.
6. The heat recovery system of claim 4, further comprising: a bypass valve group comprising a first bypass valve, a second bypass valve, a third bypass valve, a fourth bypass valve, and a fifth bypass valve;
the low-pressure regenerative heater group comprises a first low-pressure heater, a second low-pressure heater, a third low-pressure heater and a fourth low-pressure heater;
the first bypass valve is arranged on a connecting pipeline of the fine processing device and the first low-pressure heater and used for controlling the delivery of the condensed water;
the second bypass valve is arranged on a connecting pipeline between the first low-pressure heater and the second low-pressure heater and used for controlling the delivery of condensed water;
the third bypass valve is arranged on a connecting pipeline between the second low-pressure heater and the third low-pressure heater and used for controlling the delivery of condensed water;
the fourth bypass valve is arranged on a connecting pipeline between the third low-pressure heater and the fourth low-pressure heater and is used for controlling the delivery of condensed water;
and the fifth bypass valve is arranged on a connecting pipeline between the fourth low-pressure heater and the deaerator and used for controlling the delivery of the condensed water.
7. The heat recovery system of claim 6, wherein the high-energy water waste heat recovery heat exchanger group comprises a first waste heat recovery heat exchanger, a second waste heat recovery heat exchanger, a third waste heat recovery heat exchanger, a fourth waste heat recovery heat exchanger and a fifth waste heat recovery heat exchanger, and each waste heat recovery heat exchanger in the high-energy water waste heat recovery heat exchanger group comprises a heat-releasing side;
the boiler drain pump is connected with the heat release side of the first waste heat recovery heat exchanger;
the heat release side of the first waste heat recovery heat exchanger is connected with the heat release side of the second waste heat recovery heat exchanger;
the heat release side of the second waste heat recovery heat exchanger is connected with the heat release side of the third waste heat recovery heat exchanger;
the heat release side of the third waste heat recovery heat exchanger is connected with the heat release side of the fourth waste heat recovery heat exchanger;
the heat release side of the fourth waste heat recovery heat exchanger is connected with the heat release side of the fifth waste heat recovery heat exchanger;
and the heat release side of the fifth waste heat recovery heat exchanger is connected with the condenser.
8. The heat recovery system of claim 7, further comprising: a main way valve group including a first main way valve, a second main way valve, a third main way valve, a fourth main way valve, a fifth main way valve, a sixth main way valve, a seventh main way valve, an eighth main way valve, a ninth main way valve, and a tenth main way valve;
each waste heat recovery heat exchanger in the high-energy water waste heat recovery heat exchanger group further comprises a heat absorption side;
the first main path valve is arranged on a connecting pipeline between the fine processing device and the heat absorption side of the first waste heat recovery heat exchanger and is used for controlling the delivery of condensed water;
the second main circuit valve is arranged on a connecting pipeline between the heat absorption side of the first waste heat recovery heat exchanger and the first low-pressure heater and used for controlling the conveying of condensed water;
the third main path valve is arranged on a connecting pipeline between the first low-pressure heater and the heat absorption side of the second waste heat recovery heat exchanger and used for controlling the delivery of condensed water;
the fourth main way valve is arranged on a connecting pipeline between the heat absorption side of the second waste heat recovery heat exchanger and the second low-pressure heater and used for controlling the conveying of condensed water;
the fifth main path valve is arranged on a connecting pipeline between the second low-pressure heater and the heat absorption side of the third waste heat recovery heat exchanger and used for controlling the delivery of condensed water;
the sixth main path valve is arranged on a connecting pipeline between the heat absorption side of the third waste heat recovery heat exchanger and the third low-pressure heater and used for controlling the delivery of condensed water;
the seventh main valve is arranged on a connecting pipeline between the third low-pressure heater and the heat absorption side of the fourth waste heat recovery heat exchanger and is used for controlling the delivery of condensed water;
the eighth main path valve is arranged on a connecting pipeline between the heat absorption side of the fourth waste heat recovery heat exchanger and the fourth low-pressure heater and used for controlling the conveying of condensed water;
the ninth main path valve is arranged on a connecting pipeline between the fourth low-pressure heater and the heat absorption side of the fifth waste heat recovery heat exchanger and used for controlling the delivery of condensed water;
and the tenth main path valve is arranged on a connecting pipeline between the heat absorption side of the fifth waste heat recovery heat exchanger and the deaerator and is used for controlling the delivery of condensed water.
9. A method of heat recovery, the method comprising:
when the boiler operates in a wet state, the atmosphere flash tank is controlled to release high-energy water, the high-energy water enters the high-energy water waste heat recovery heat exchanger group to be used for performing waste heat recovery on the high-energy water by the high-energy water waste heat recovery heat exchanger group, the drained water after heat dissipation is released, and the drained water enters the condenser to be condensed into condensed water by the condenser.
10. The heat recovery method of claim 9, wherein the controlling the atmospheric flash tank to release the high-energy water so that the high-energy water enters the high-energy water waste heat recovery heat exchanger bank comprises:
and controlling the drain outlet valve to be opened, so that the high-energy water released by the atmospheric flash tank enters the high-energy water waste heat recovery heat exchanger group.
11. The heat recovery method of claim 9, further comprising:
when the boiler is in wet operation, the main valve group is controlled to be opened, the bypass valve group is controlled to be closed, so that condensed water released in the condenser enters the fine treatment device for fine treatment, and the condensed water after fine treatment is heated and conveyed to the deaerator through the low-pressure regenerative heater group and the high-energy water waste heat recovery heat exchanger group.
12. The heat recovery method of claim 9, further comprising:
when the boiler is in dry operation, the boiler drain pump and the main path valve set are controlled to be closed, the bypass valve set is opened, so that condensed water released from the condenser enters the fine treatment device for fine treatment, and the condensed water after fine treatment is heated by the low-pressure regenerative heater set and is conveyed to the deaerator.
13. A heat recovery device, characterized in that the device comprises:
and the release unit is used for controlling the atmosphere flash tank to release high-energy water when the boiler operates in a wet state, so that the high-energy water enters the high-energy water waste heat recovery heat exchanger group to be used for the high-energy water waste heat recovery heat exchanger group to perform waste heat recovery on the high-energy water, and releases the drained water after heat dissipation to make the drained water enter the condenser to be used for condensing the drained water into condensed water.
14. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the heat recovery method according to any one of claims 9 to 12.
15. A computer device comprising a memory for storing information including program instructions and a processor for controlling the execution of the program instructions, wherein the program instructions are loaded and executed by the processor to implement the heat recovery method of any of claims 9 to 12.
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| CN202210227607.8A CN114754350B (en) | 2022-03-08 | 2022-03-08 | Heat recovery system, method and device |
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