CN214537461U - Energy-saving vacuum pumping system for waste heat power generation - Google Patents

Abstract

The utility model discloses an energy-saving vacuum air exhaust system for waste heat power generation, including condenser and a plurality of vacuum pump, a plurality of vacuum pump all communicates with the condenser, be provided with evacuating device between vacuum pump and the condenser, evacuating device is including the female pipe of bleeding, steam ejector, condenser and valve, the inlet end of two female pipes of bleeding communicates respectively at the height of condenser, on the low pressure steam outlet, steam ejector's inlet end communicates with the end of giving vent to anger of two female pipes of bleeding respectively, the inlet end of condenser and steam ejector's the end intercommunication of giving vent to anger, the inlet end of giving vent to anger end and the inlet end of vacuum pump of condenser intercommunication, the condensate return liquid of condenser passes through the pipeline and flows back to in the hot well of condenser, the valve is installed respectively in the entering of condenser, on the pipeline of the end of giving vent to anger. The vacuumizing device has a good vacuumizing effect, reduces the cavitation of steam in the condenser to the vacuum pump, greatly reduces the steam temperature of the vacuum pump, and improves the operation safety of the vacuum pump.

Description

Energy-saving vacuum pumping system for waste heat power generation

Technical Field

The utility model relates to an automotive equipment technical field, concretely relates to waste heat power generation is with energy-saving vacuum pumping system.

Background

The vacuumizing system is an important component of a direct air cooling system and is used for establishing and maintaining low back pressure of a turbine set and vacuum of a condenser. When the unit is started, some air accumulated in steam and water pipeline systems and equipment is pumped out, so that the starting speed is accelerated. And in normal operation, steam, water and air and other non-condensable gas leaked into the vacuum system are pumped out in time so as to maintain the vacuum of the air-cooling condenser and reduce the corrosion to equipment and the like. The shaft seal and the low-pressure heater of the low-pressure part of the steam turbine also depend on the normal work of a vacuum pumping system to establish corresponding vacuum.

The condenser has poor vacuum tightness, the vacuum degree requirement of the condenser cannot be met by the treatment of the vacuum pump, the minimum back pressure of the condenser cannot be maintained, in addition, the working fluid of the vacuum pump is greatly gasified due to the fact that the temperature of the working fluid of the vacuum pump is high in summer, the output of the vacuum pump is influenced, the energy consumption of the vacuum pump is high, the vacuum pump is influenced by cavitation for a long time, an impeller is cracked and easily broken, and the safe operation of a vacuum pumping system is directly influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an energy-saving vacuum pumping system for waste heat power generation to the evacuation effect of solving the condenser receives the influence of vacuum pump working medium, and the cavitation easily takes place and low exerting oneself, and the big problem of vacuum pump evacuation power consumption.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides an energy-saving vacuum air exhaust system for cogeneration, includes condenser and a plurality of vacuum pump, a plurality of the vacuum pump all with the condenser intercommunication, the vacuum pump with be provided with evacuating device between the condenser, evacuating device is including female pipe, steam ejector, condenser and valve of bleeding, two the inlet end of female pipe of bleeding communicates respectively on the high, low pressure steam outlet of condenser, steam ejector's inlet end respectively with two the end intercommunication of giving vent to anger of female pipe of bleeding, the inlet end of condenser with steam ejector's the end intercommunication of giving vent to anger, the end of giving vent to anger of condenser with the inlet end intercommunication of vacuum pump, the condensate return fluid of condenser flow back extremely through the pipeline in the hot well of condenser, the valve is installed respectively on the pipeline of the end of giving vent to anger of condenser.

The further technical scheme is as follows: and a liquid ring pump for exhausting steam to the atmosphere is arranged on the condenser.

The further technical scheme is as follows: and a steam-water separator, a pressure transmitter and a pressure gauge are sequentially arranged on the pipeline at the air inlet end of the steam ejector along the flow direction of steam.

The further technical scheme is as follows: the condenser is a gourd-shaped heat exchanger, at least two layers of cooling water pipes are arranged in the gourd-shaped heat exchanger, and the cooling water pipes are communicated with a cooling water source flowing from the outside.

The further technical scheme is as follows: the cooling water pipe is an S-shaped baffling pipe, and the air inlet end in the condenser is arranged downwards and is opposite to the upper surface of the baffling pipe.

The further technical scheme is as follows: and the condenser is provided with a transparent communicating pipe.

Compared with the prior art, the utility model discloses can reach one of following beneficial effect at least:

1. the utility model provides an energy-saving vacuum pumping system for waste heat power generation, with the direct working method to the condenser evacuation of traditional vacuum pump, it will be taken out high in the condenser to utilize through the steam ejector to change into, low pressure steam, rethread condenser carries out condensation steam ejector spun steam, reach steam utilization, energy saving and consumption reduction's effect, steam ejector goes out the dynamic range, and is energy-conserving high-efficient, with high, low pressure steam is the power supply, not only reduce the steam corrosion of steam to the vacuum pump in the condenser, still very big reduction the steam temperature that comes of vacuum pump, the security of the operation of vacuum pump has greatly been improved.

2. The steam inlet end of the steam ejector is provided with the gas-liquid separator, the pressure transmitter and the pressure gauge, so that water in steam can be screened out, the saturation degree of the steam is improved, and the steam pressure can be adjusted through the pressure transmitter.

Drawings

Fig. 1 is a schematic structural diagram of the energy-saving vacuum pumping system for cogeneration of the utility model.

Fig. 2 is a schematic structural view of the steam ejector of fig. 1 according to the present invention.

Fig. 3 is a schematic structural view of the condenser of fig. 1 according to the present invention.

Reference numeral 1, a condenser; 2. a vacuum pump; 3. a vacuum pumping device; 4. an air exhaust main pipe; 5. a steam ejector; 6. a condenser; 61. a cooling water pipe; 7. a valve; 8. a steam-water separator; 9. a pressure transmitter; 10. a pressure gauge; 11. a communication pipe is provided.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1:

embodiment 1 please refer to an embodiment shown in fig. 1, an energy-saving vacuum pumping system for waste heat power generation comprises a condenser 1 and a plurality of vacuum pumps 2, wherein the plurality of vacuum pumps 2 are all communicated with the condenser 1, a vacuum pumping device 3 is arranged between the vacuum pumps 2 and the condenser 1, the vacuum pumping device 3 comprises a pumping main pipe 4, a steam ejector 5, a condenser 6 and a valve 7, the air inlet ends of the two pumping main pipes 4 are respectively communicated with the high-pressure steam outlet and the low-pressure steam outlet of the condenser 1, the air inlet end of the steam ejector 5 is respectively communicated with the air outlet ends of the two pumping main pipes 4, the air inlet end of the condenser 6 is communicated with the air outlet end of the steam ejector 5, the air outlet end of the condenser 6 is communicated with the air inlet end of the vacuum pump 2, and the condensate of the condenser 6 flows back to a hot well of the condenser 1 through a pipeline, and the valves 7 are respectively arranged on pipelines at the air inlet end and the air outlet end of the condenser 6.

The energy-saving vacuum air extraction system for waste heat power generation is characterized in that a vacuum extractor 3 is arranged between a vacuum pump 2 and a condenser 1, high-pressure steam and low-pressure steam to be extracted from the condenser 1 are guided into two steam ejectors 5 by an air extraction main pipe 4 by the vacuum extractor 3, the steam ejectors 5 are driven by the high-pressure steam and the low-pressure steam, the condenser 6 condenses the high-pressure steam and the low-pressure steam sprayed by the steam ejectors 5 into water and returns the water into a hot well of the condenser 1 through pipelines, valves 7 are respectively arranged on pipelines at the air inlet end and the air outlet end of the condenser 6 and are used for controlling the opening and closing of the steam in the steam pipelines, the steam pipelines form a passage passing through the condenser 6 through the cooperation with the valves 7, the steam ejectors 5 suck non-condensable gas and the steam at the high-pressure side and the low-pressure side of the condenser 1, the steam is recovered and condensed into water through the condenser 6, and the non-condensable odd and a small amount of the steam are discharged through the vacuum pump 2, the steam ejector 5 has high outlet force, high-pressure steam and low-pressure steam are used as power sources, so that the steam corrosion of steam in a condenser to the vacuum pump is reduced, the steam temperature of the vacuum pump is greatly reduced, the problems of the cavitation noise of the vacuum pump, the breakage of a rotor and the like are solved, the running safety of the vacuum pump is improved, the suction capacity of the vacuum pump is reduced, the purposes of energy conservation and consumption reduction are achieved, and the vacuumizing effect is greatly improved.

Example 2:

in addition to the above embodiment 1, the embodiment 2 shows an embodiment in which the condenser 6 is provided with a liquid ring pump 7 for discharging steam to the atmosphere.

Be provided with the low-power liquid ring pump 7 that is used for condenser 1 steam to exhaust atmosphere on condenser 6, when steam was too much in condenser 6, steam ejector 5 can utilize most exhaust steam, but few steam still probably can not come from steam ejector 5 exhaust, cause the too high problem of equipment excessive pressure one-level temperature easily, damage equipment, including an independent liquid ring pump 7, directly clap the steam in condenser 1 and take out the negative pressure greatly, can effectively avoid above problem, and simultaneously, take a liquid ring pump 7 instrument operation through two steam ejectors 5, both can satisfy normal operating condition requirement, can prevent proruption problem again.

Example 3:

on the basis of the above embodiments, in embodiment 3, referring to fig. 2, a steam-water separator 8, a pressure transmitter 9 and a pressure gauge 10 are sequentially installed on a pipeline at an air inlet end of the steam injector 5 along a steam flowing direction.

Install vapour and liquid separator 8, pressure transmitter 9 and manometer 10 at steam ejector 5's steam inlet end, can screen out the water in the steam, improve the saturation degree of steam, can adjust through pressure transmitter 9 and come vapour pressure, the better work of steam ejector 5 of being convenient for.

Example 4:

on the basis of the above embodiments, in embodiment 4, referring to fig. 3, as an embodiment, the condenser 6 is a gourd-shaped heat exchanger, at least two layers of cooling water pipes 61 are arranged in the gourd-shaped heat exchanger, and the cooling water pipes 61 are communicated with a cooling water source flowing from the outside.

Preferably, the cooling water pipe 61 is an S-shaped baffle pipe, and an air inlet end in the condenser 6 is disposed downward and faces an upper surface of the baffle pipe.

Preferably, the condenser 6 is provided with a transparent communicating pipe 11.

Improve condenser 6 and be calabash type heat exchanger, the narrow exchange that can reduce high, low pressure steam in the middle part of calabash type heat exchanger improves the condensation effect of each part steam, is provided with at least two-layer condenser tube 61 in the calabash type heat exchanger, can increase and neat area of contact, and condenser tube 61 intercommunication has external mobile cooling water source, can improve cooling efficiency, and condenser tube 61 cold water flow direction and vapor direction are against the current in addition.

The condenser 6 is provided with a transparent communicating pipe 11, so that the accumulated amount of condensed water can be observed conveniently, the condensed water can be discharged conveniently in time, and whether steam is introduced or not can be detected.

Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," "a preferred embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (6)

1. The utility model provides an energy-saving vacuum pumping system for cogeneration, includes condenser (1) and a plurality of vacuum pump (2), a plurality of vacuum pump (2) all with condenser (1) intercommunication, its characterized in that: vacuum pump (2) with be provided with evacuating device (3) between condenser (1), evacuating device (3) are including female pipe (4), steam ejector (5), condenser (6) and valve (7) of bleeding, two the inlet end of female pipe (4) of bleeding communicates respectively on the high, low pressure steam outlet of condenser (1), the inlet end of steam ejector (5) respectively with two the end intercommunication of giving vent to anger of female pipe (4) of bleeding, the inlet end of condenser (6) with the end intercommunication of giving vent to anger of steam ejector (5), the end of giving vent to anger of condenser (6) with the inlet end intercommunication of vacuum pump (2), the condensate return fluid of condenser (6) flows back to in the hot well of condenser (1) through the pipeline, valve (7) are installed respectively the inlet of condenser (6), The pipeline of the air outlet end.

2. The energy-saving vacuum air extraction system for cogeneration according to claim 1, wherein: and a liquid ring pump for exhausting steam to the atmosphere is arranged on the condenser (6).

3. The energy-saving vacuum air extraction system for cogeneration according to claim 1, wherein: and a steam-water separator (8), a pressure transmitter (9) and a pressure gauge (10) are sequentially arranged on the pipeline at the air inlet end of the steam ejector (5) along the steam flowing direction.

4. The energy-saving vacuum air extraction system for cogeneration according to claim 1, wherein: condenser (6) are calabash type heat exchanger, be provided with two-layer at least cooling water pipe (61) in the calabash type heat exchanger, cooling water pipe (61) intercommunication has the cooling water source of external flow.

5. The energy-saving vacuum air extraction system for cogeneration according to claim 4, wherein: the cooling water pipe (61) is an S-shaped baffling pipe, and the air inlet end in the condenser (6) is arranged downwards and is opposite to the upper surface of the baffling pipe.

6. The energy-saving vacuum air extraction system for cogeneration according to claim 1, wherein: and a transparent communicating pipe (11) is arranged on the condenser (6).

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