CN208312424U - Condensed water is used for the heat recovery system of low nitrogen burning - Google Patents
Condensed water is used for the heat recovery system of low nitrogen burning Download PDFInfo
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- CN208312424U CN208312424U CN201821340368.2U CN201821340368U CN208312424U CN 208312424 U CN208312424 U CN 208312424U CN 201821340368 U CN201821340368 U CN 201821340368U CN 208312424 U CN208312424 U CN 208312424U
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- heat recovery
- condensed water
- boiler
- low nitrogen
- saving appliance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses the heat recovery system that a kind of condensed water is used for low nitrogen burning, it includes air wetting tower, boiler and flue gas waste heat recovery energy-saving appliance, the air inlet of the air wetting tower is equipped with blower, the air outlet of the air wetting tower is connected to by pipeline with boiler, the flue gas waste heat recovery energy-saving appliance is installed on the chimney of the boiler, energy-saving appliance water inlet pipe and energy-saving appliance outlet pipe are connected on the flue gas waste heat recovery energy-saving appliance, the connection of one end of the flue gas waste heat recovery energy-saving appliance and condensate pipe, the other end of the condensate pipe extends to the top of the air wetting tower.The heat recovery system for being used for low nitrogen burning its purpose is to provide a kind of condensed water, the system can reduce the concentration of the nitrogen oxides of boiler emission under the premise of not reducing boiler thermal efficiency.
Description
Technical field
The utility model relates to HVAC fields, more particularly to a kind of heat recovery system for boiler.
Background technique
Fuel of the natural gas as hot-water boiler, main component are the hydrocarbons such as alkanes.After combustion of natural gas
Primary product is carbon dioxide and water, contains a small amount of acid compound (nitrogen oxides).
" emission standard of air pollutants for boilers " that on April 1st, 2017 implements is, it is specified that active boiler discharged nitrous oxides limit
Value will be down to 80 milligrams/cubic metre from 150 milligrams/cubic metre, newly constructed boiler emission limits of nitrogen oxides will from 150 milligrams/it is vertical
Square 30 milligram/cubic metre of meter Jiang Zhi.Existing combustion gas low nitrogen burning mode can reduce heating power type by reducing flame temperature
The generation of nitrogen oxides, to reduce the concentration of nitrogen oxides.However boiler efficiency will certainly be brought by reducing combustion flame temperature
Reduction, counted according to related data, nitrous oxides concentration is lower, and boiler thermal efficiency is lower.
Utility model content
The technical problem to be solved by the present invention is to provide the heat recovery systems that a kind of condensed water is used for low nitrogen burning, should
System can reduce the concentration of the nitrogen oxides of boiler emission under the premise of not reducing boiler thermal efficiency.
The utility model condensed water is used for the heat recovery system of low nitrogen burning, including more than air wetting tower, boiler and flue gas
Heat recovery energy-saving device, the air inlet of the air wetting tower are equipped with blower, and the air outlet of the air wetting tower passes through pipeline
It is connected to boiler, the flue gas waste heat recovery energy-saving appliance, the flue gas waste heat recovery energy conservation is installed on the chimney of the boiler
Energy-saving appliance water inlet pipe and energy-saving appliance outlet pipe, one end company of the flue gas waste heat recovery energy-saving appliance and condensate pipe are connected on device
It connects, the other end of the condensate pipe extends to the top of the air wetting tower.
The utility model condensed water is used for the heat recovery system of low nitrogen burning, wherein installing water position on the condensate pipe
Manage case.
The utility model condensed water is used for the heat recovery system of low nitrogen burning, wherein the tank wall of the water treatment case is equipped with
Insulating layer.
The utility model condensed water is used for the heat recovery system of low nitrogen burning, wherein being equipped with condensation on the condensate pipe
Water blowdown valve.
The utility model condensed water is used for the heat recovery system of low nitrogen burning, wherein being equipped with spray on the condensate pipe
Pump.
The utility model condensed water is used for the heat recovery system of low nitrogen burning, wherein the bottom of the air wetting tower passes through
Pipeline is connected to the circulatory system of the boiler.
The utility model condensed water is that this is practical for the heat recovery system difference from prior art of low nitrogen burning
It is novel that flue gas waste heat recovery energy-saving appliance is installed on the chimney of boiler tail, it is empty as heating burning using the condensed water of energy-saving appliance
The heat source of gas, while combustion air humidity is improved, ignition temperature is reduced, the generation of nitrogen oxides, the relatively common low nitrogen of efficiency are reduced
Combustion system improves 6%~10%.
The utility model is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the utility model condensed water for the heat recovery system of low nitrogen burning.
Specific embodiment
As shown in Figure 1, it includes air wetting tower that the utility model condensed water includes for the heat recovery system of low nitrogen burning
2, boiler 4 and flue gas waste heat recovery energy-saving appliance 5, the air inlet of the air wetting tower 2 are equipped with blower 1, the air wetting
The air outlet of tower 2 is connected to by pipeline with boiler 4, gas pipeline 3 is connected on boiler 4, combustion gas enters pot from gas pipeline 3
In furnace 4, the air come out from air wetting tower 2, which is entered together with combustion gas in boiler 4, to burn.
As shown in Figure 1, the flue gas waste heat recovery energy-saving appliance 5 is equipped on the chimney 6 of the boiler 4, more than the flue gas
Be connected with energy-saving appliance water inlet pipe 51 and energy-saving appliance outlet pipe 52 on heat recovery energy-saving device 5, the flue gas waste heat recovery energy-saving appliance 5 with
One end of condensate pipe 53 connects, and the other end of the condensate pipe 53 extends to the top of the air wetting tower 2.Positioned at sky
The condensate pipe 53 at 2 top of gas humidification tower sprays the air flowed through in tower as spray tube.
Circulate cold source water in flue gas waste heat recovery energy-saving appliance 5, and cold source water enters fume afterheat from energy-saving appliance water inlet pipe 51 and returns
It receives in energy-saving appliance 5, is flowed out after exchanging heat from energy-saving appliance outlet pipe 52.
The utility model condensed water is used for the heat recovery system of low nitrogen burning, wherein being equipped with water on the condensate pipe 53
Treatment box 7.The tank wall of the water treatment case 7 is equipped with insulating layer 71.
The utility model condensed water is used for the heat recovery system of low nitrogen burning, wherein being equipped on the condensate pipe 53 cold
Condensate blowdown valve 54, the internal cleaning for condensate pipe 53.
The utility model condensed water is used for the heat recovery system of low nitrogen burning, wherein being equipped with spray on the condensate pipe 53
Leaching pump 8, for condensed water to be transported to the top of air wetting tower 2.
The utility model condensed water is used for the heat recovery system of low nitrogen burning, wherein the bottom of the air wetting tower 2 is logical
It crosses pipeline to be connected to the circulatory system of the boiler 4, the condensed water of 2 bottom of air wetting tower can be delivered to following for boiler 4
Moisturizing in loop system, for 4 circulatory system of boiler.
The working principle of the utility model is as follows: the flue gas that the burning of boiler 4 generates passes through flue gas waste heat recovery energy-saving appliance 5,
Cold source water sufficiently exchanges heat with flue gas in energy-saving appliance, and smoke temperature is reduced to 50-70 degrees Celsius.With the reduction of flue-gas temperature, flue gas
In vapor condensation.Condensed water is collected into water treatment case 7, does after adding alkali, water treatment, is sent by the pressurization of spray pump 8
To the top of air wetting tower 2, sprays nebulize again later.Water treatment case 7 does isothermal holding and is applied to storage condensed water heat.
Combustion air is from bottom to top conveyed by blower 1 in air wetting tower 2, is come into full contact with misty condensed water, and same space-time is heated
Air humidity degree rises to close to 100%.Rich steam-laden air in boiler 4 with one combust of combustion gas, the vapor of high concentration
Thermal NO during environment carries out burningXIt is greatly reduced.Condensed water habitat is arranged at 2 bottom of air wetting tower, the part
Condensed water can be used for the moisturizing of 4 circulatory system of boiler.
The means that flue gas waste heat recovery energy-saving appliance 5 is effective recovered flue gas heat are installed on the chimney 6 of 4 tail portion of boiler.
In flue gas contain a large amount of vapor, flue gas in energy-saving appliance cold source water heat transfer process, since the reduction vapor of temperature is cold
Condensation goes out, and generates condensed water.Condensate temperature is related with outlet smoke temperature, generally at 40~60 degrees Celsius.
The utility model proposes a kind of efficient low nitrogen burning systems, in the installation flue gas condensing recuperation of heat energy conservation of 4 tail portion of boiler
Device using energy-saving appliance condensed water as the heat source of heating combustion air, while improving combustion air humidity, reduces ignition temperature,
Reduce the generation of nitrogen oxides.The more common low nitrogen burning system of integrated system efficiency improves 6%~10%.
The technical effect of the utility model is as follows:
(1) flue gas is installed on the chimney of boiler tail 6 and boiler system efficiency of combustion 6% can be improved in heat recovery energy-saving device
~10%.
(2) the condensed water warming and humidifying combustion air that recuperation of heat generates reduces burning by increasing the humidity of burning situation
Temperature, so as to which the nitrogen oxides generated in combustion process is greatly lowered.
(3) condensed water assembled after spraying reduces the external rate of water make-up of boiler system for boiler system moisturizing.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines
In range.
Claims (6)
1. the heat recovery system that a kind of condensed water is used for low nitrogen burning, it is characterised in that: including air wetting tower, boiler and flue gas
Waste heat recovery economizer, the air inlet of the air wetting tower are equipped with blower, and the air outlet of the air wetting tower passes through pipe
Road is connected to boiler, and the flue gas waste heat recovery energy-saving appliance, the flue gas waste heat recovery section are equipped on the chimney of the boiler
Energy-saving appliance water inlet pipe and energy-saving appliance outlet pipe, one end of the flue gas waste heat recovery energy-saving appliance and condensate pipe can be connected on device
Connection, the other end of the condensate pipe extend to the top of the air wetting tower.
2. the heat recovery system that condensed water according to claim 1 is used for low nitrogen burning, it is characterised in that: the condensed water
Water treatment case is installed on pipe.
3. the heat recovery system that condensed water according to claim 2 is used for low nitrogen burning, it is characterised in that: the water process
The tank wall of case is equipped with insulating layer.
4. the heat recovery system that condensed water according to claim 3 is used for low nitrogen burning, it is characterised in that: the condensed water
Condensate water blowoff valve is installed on pipe.
5. the heat recovery system that condensed water according to claim 4 is used for low nitrogen burning, it is characterised in that: the condensed water
Spray pump is installed on pipe.
6. the heat recovery system that condensed water according to claim 5 is used for low nitrogen burning, it is characterised in that: the air adds
The bottom of wet tower is connected to by pipeline with the circulatory system of the boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821340368.2U CN208312424U (en) | 2018-08-20 | 2018-08-20 | Condensed water is used for the heat recovery system of low nitrogen burning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821340368.2U CN208312424U (en) | 2018-08-20 | 2018-08-20 | Condensed water is used for the heat recovery system of low nitrogen burning |
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| Publication Number | Publication Date |
|---|---|
| CN208312424U true CN208312424U (en) | 2019-01-01 |
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ID=64717481
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821340368.2U Active CN208312424U (en) | 2018-08-20 | 2018-08-20 | Condensed water is used for the heat recovery system of low nitrogen burning |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579008A (en) * | 2019-01-07 | 2019-04-05 | 清华大学 | The warm and humid coupling gas fired-boiler low nitrogen burning system of one kind and operation method |
| CN111964042A (en) * | 2020-08-14 | 2020-11-20 | 河南中烟工业有限责任公司 | Energy-saving smoke exhaust system of gas boiler |
| CN114893786A (en) * | 2022-04-18 | 2022-08-12 | 北京科技大学 | Boiler flue gas total heat degree of depth recovery unit |
-
2018
- 2018-08-20 CN CN201821340368.2U patent/CN208312424U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579008A (en) * | 2019-01-07 | 2019-04-05 | 清华大学 | The warm and humid coupling gas fired-boiler low nitrogen burning system of one kind and operation method |
| CN109579008B (en) * | 2019-01-07 | 2024-05-10 | 清华大学 | Low-nitrogen combustion system of temperature-humidity coupled gas-fired boiler and operation method |
| CN111964042A (en) * | 2020-08-14 | 2020-11-20 | 河南中烟工业有限责任公司 | Energy-saving smoke exhaust system of gas boiler |
| CN111964042B (en) * | 2020-08-14 | 2022-06-21 | 河南中烟工业有限责任公司 | Energy-saving smoke exhaust system of gas boiler |
| CN114893786A (en) * | 2022-04-18 | 2022-08-12 | 北京科技大学 | Boiler flue gas total heat degree of depth recovery unit |
| CN114893786B (en) * | 2022-04-18 | 2023-02-17 | 北京科技大学 | Boiler flue gas total heat degree of depth recovery unit |
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