CN210242475U - Vacuum pumping system capable of improving pumping capacity of vacuum pump - Google Patents

Vacuum pumping system capable of improving pumping capacity of vacuum pump Download PDF

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Publication number
CN210242475U
CN210242475U CN201920952349.3U CN201920952349U CN210242475U CN 210242475 U CN210242475 U CN 210242475U CN 201920952349 U CN201920952349 U CN 201920952349U CN 210242475 U CN210242475 U CN 210242475U
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China
Prior art keywords
vacuum pump
pumping
refrigerant
vacuum
heat exchange
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CN201920952349.3U
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Inventor
Qiang Yu
于强
Rui Tan
谭锐
Xiaofeng Ma
马晓峰
Wenzheng Yang
杨文正
Dongbo Bai
白冬波
Chaobing Li
李朝兵
Jiawu Lin
林加伍
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Guoneng Nanjing Electric Power Test Research Co.,Ltd.
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Guodian Nanjing Electric Power Test Research Co Ltd
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Abstract

The utility model discloses a vacuum pumping system capable of improving the pumping capacity of a vacuum pump, which comprises a condenser and a vacuum pump, wherein the air pumped by the condenser is connected with the vacuum pump through an air pumping pipeline, the air pumping pipeline between the condenser and the vacuum pump is divided into a main path system and a bypass system, and the main path system is connected with the vacuum pump through a main path valve; the bypass system is connected with the vacuum pump through a bypass inlet electric door, a heat exchange device and a bypass outlet electric door in sequence; a cold source inlet and a cold source outlet of the heat exchange device in the bypass system are respectively connected with the refrigerant loop; and the condensed water of the heat exchange device flows back to the hot well of the condenser through a drain pipeline. The utility model discloses a leading cooling system of condenser vacuum pump, make full use of air conditioner refrigerated water cools off as the high-quality refrigerant, and its cooling effect does not receive external environment temperature's influence, and the cooling effect is good, and simple structure is reliable, needs to increase extra power consumption fewly.

Description

Vacuum pumping system capable of improving pumping capacity of vacuum pump
The technical field is as follows:
the utility model relates to a can improve evacuation system of vacuum pump suction ability.
Background art:
the existing large-scale thermal power generating unit, no matter water-cooled unit or air-cooled unit, all have a air extraction pipeline connected between vacuum pump and the condenser, the vacuum pump will take out a large amount of steam in the same direction as pumping the non-condensable gas in the condenser, this steam has occupied most air extraction pipeline volume, and increased the flow resistance of the mixed gas, reduce its effective pumping capacity. Meanwhile, water vapor is condensed in the water-ring vacuum pump to release heat, so that the working fluid temperature of the vacuum pump is increased after the vacuum pump is operated for a long time, the working environment is deteriorated, the pumping capacity is influenced, and the service life of the vacuum pump is shortened.
In order to overcome the technical defects, patent No. CN202675930U proposes to add a water spray cooling device in the air pumping pipeline, and the water source is demineralized water. However, the cooling effect of the method is limited by the temperature of the demineralized water, the higher the water temperature is, the more demineralized water is needed, and the larger the water temperature is, the larger the internal circulation resistance formed by the water spraying temperature reducing device is, so that the power consumption of the vacuum pump is increased to a certain extent. In summer, central air conditioners are used for centralized refrigeration in plant areas of power plants, part of air conditioner chilled water is generated in an air conditioner room in the refrigeration process, the water temperature of the air conditioner chilled water is about 8-10 ℃ lower than that of demineralized water, the air conditioner chilled water is a good refrigerant, but the quantity of the air conditioner chilled water is limited, and the air conditioner chilled water cannot be used for cooling industrial systems in a large range, so most power plants directly discharge the air conditioner chilled water.
The invention content is as follows:
the utility model discloses an overcome the not enough of above-mentioned technique, improved prior art, provide an evacuation system that can improve vacuum pump suction ability, not only reach better cooling effect, and can get up limited air conditioner water whole utilization, reach energy saving and consumption reduction's effect, its concrete technical scheme as follows:
a vacuum pumping system capable of improving the pumping capacity of a vacuum pump comprises a condenser and the vacuum pump, wherein the air pumped by the condenser is connected with the vacuum pump through an air pumping pipeline, the air pumping pipeline between the condenser and the vacuum pump is divided into a main path system and a bypass system, and the main path system is connected with the vacuum pump through a main path valve; the bypass system is connected with the vacuum pump through a bypass inlet electric door, a heat exchange device and a bypass outlet electric door in sequence; a cold source inlet and a cold source outlet of the heat exchange device in the bypass system are respectively connected with the refrigerant loop; and the condensed water of the heat exchange device flows back to the hot well of the condenser through a drain pipeline.
Preferably, the heat exchange device is a surface type heat exchange device.
Preferably, the refrigerant loop comprises a first refrigerant outlet electric door, a refrigerator outlet electric door, a refrigerant storage tank, a refrigerant delivery pump and a refrigerant inlet electric throttle which are connected in sequence; the first refrigerant outlet electric door is connected with a cold source outlet of the heat exchange device; the refrigerant inlet electric adjusting door is connected with a cold source inlet of the heat exchange device.
Preferably, the cold source outlet of the heat exchange device is also connected with a circulating cooling water return pipe.
Preferably, a water inlet of the circulating cooling water return pipeline is provided with a second refrigerant outlet electric door.
Preferably, the refrigerant is chilled water of an air conditioner room.
Preferably, a steam trap is arranged on the steam trap pipe.
Preferably, the vacuum pump is a water ring vacuum pump.
Preferably, the steam trap is a multi-stage water seal device.
Preferably, a multi-stage water sealing device outlet valve is arranged at the multi-stage water sealing device outlet.
The utility model discloses compare and have following beneficial effect in prior art:
the utility model discloses a can improve evacuation system of vacuum pump suction ability utilizes the refrigerant holding vessel that has the heat preservation effect, concentrates the heat transfer device who stores up in the confession air extraction pipeline with the refrigerant and uses, can not only effectively improve vacuum pump suction ability, has reached energy recuperation's effect moreover.
The utility model discloses a can improve evacuation system of vacuum pump suction ability, to the problem that air conditioner room refrigerated water and mist condensate water quality of water difference can not be retrieved to the condenser simultaneously, utilize surface formula heat transfer device to replace hybrid heat transfer device for the refrigerated water of air conditioner is separated with the mist condensate water, and make full use of air conditioner refrigerated water cools off as the high-quality refrigerant, effectively improves vacuum pump suction ability, and can also recycle the vapour condensate water, reach the effect of retrieving the working medium.
The utility model discloses a can improve evacuation system of vacuum pump suction ability, the refrigerant of use is air conditioner room refrigerated water, and its temperature is used for refrigerated demineralized water temperature to hang down about 8 ~ 10 ℃ than among the prior art, and the use amount of air conditioner refrigerated water is only half of demineralized water, so the utility model discloses when reaching prior art cooling effect, not only can make refrigerant pipeline's pipe diameter reduce, reduce equipment tubular product consumption, and because the water yield subtracts half, effectively reduces the effect of refrigerant delivery pump power consumption.
The utility model discloses a can improve evacuation system of vacuum pump suction ability has increased reserve refrigerator, if the refrigerant in the refrigerant holding vessel can not satisfy when using, can also open the refrigerant behind the reserve refrigerator cooling heat transfer, supplies the system cycle to use.
Drawings
FIG. 1 is a schematic structural diagram of an evacuation system according to an embodiment;
wherein, 1-a condenser; 2-an air extraction pipeline; 3-main road electric gate; 4-bypass inlet electric gate; 5-bypass outlet electrically operated gate; 6-a hydrophobic pipeline; 7-multi-stage water seal device; 8-an outlet valve of the multi-stage water seal device; 9-refrigerant outlet pipe; 10-refrigerant inlet pipe; 11-refrigerant inlet electric regulating valve; 12-heat exchange means; 13-a vacuum pump; 14-chilled water inlet pipe; 15-refrigerant delivery pump; 16-refrigerant storage tank; 17-refrigerator outlet electric door; 18-a refrigerator; 19-a first refrigerant outlet electric door; 20-a second refrigerant outlet electric door; 21-condenser hot well.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The first embodiment is as follows:
the vacuum pumping system capable of improving the pumping capacity of the vacuum pump according to the present embodiment includes, as shown in fig. 1, a condenser 1 and a vacuum pump 13, and the vacuum pump 13 is a water ring vacuum pump. The air pumping pipeline 2 between the condenser 1 and the vacuum pump 13 is divided into a main path system and a bypass system, wherein the main path system is connected with the vacuum pump 13 through a main path electric door 3; the bypass system is connected with a vacuum pump 13 through a bypass inlet electric door 4, a heat exchange device 12 and a bypass outlet electric door 5 in sequence; a cold source inlet and a cold source outlet of the heat exchange device 12 in the bypass system are respectively connected with the refrigerant loop; in this embodiment, the heat exchanger is a surface heat exchanger, and the refrigerant is chilled water of an air conditioner room. The refrigerant loop comprises a first refrigerant outlet electric door 19, a refrigerator 18, a refrigerator outlet electric door 17, a refrigerant storage tank 16, a refrigerant delivery pump 15 and a refrigerant inlet electric regulating door 11 which are connected in sequence; the first refrigerant outlet electric door 19 is connected with a cold source outlet of the heat exchange device 12; the refrigerant inlet electric damper 11 is connected with a cold source inlet of the heat exchange device 12. The cold source outlet of the heat exchange device 12 is further connected with a recirculated cooling water return pipe, and a second refrigerant outlet electric door 20 is arranged at the water inlet of the recirculated cooling water return pipe. The condensed water of the heat exchange device 12 flows back to the condenser hot well 21 through the drain pipe 6. The drain pipe 6 is provided with a drain. The trap in this embodiment is a multi-stage water seal 7. An outlet valve 8 of the multi-stage water sealing device is arranged at the outlet of the multi-stage water sealing device 7.
When central air-conditioning centralized refrigeration is adopted for plant refrigeration of the power plant in summer, firstly, chilled water of an air-conditioning machine room is conveyed to a refrigerant storage tank 16 through a chilled water inlet pipeline 14 and stored. When the environment temperature is high or the pumping capacity of the water-ring vacuum pump is insufficient, the refrigerant conveying pump 15 is started, the electric control door 11 of the refrigerant inlet and the second refrigerant outlet electric door 20 are opened in sequence, the chilled water of the air conditioner room in the refrigerant storage tank 16 is sent to the heat exchange device 12 through the refrigerant conveying pump 15, the refrigerant inlet pipeline 10 and the refrigerant inlet electric control door 11 for heat exchange, then the bypass outlet electric door 5, the bypass inlet electric door 4 and the multi-stage water seal device outlet valve 8 are opened in sequence, and then the main road electric door 3 is closed, at the moment, the mixed gas pumped out from the condenser 1 enters a vacuum pump 13 through a heat exchange device 12 of a bypass system, in the heat exchange device, water vapor contained in the mixed gas is condensed into water and enters a condenser hot well 21 through a multi-stage water seal device 7 and an outlet valve 8 of the multi-stage water seal device, and the chilled water of the air conditioner room after heat exchange is directly discharged into a tower tank of the cooling tower through a refrigerant outlet pipeline 9 and a circulating cooling water return pipeline. The refrigerant inlet electric damper 11 can adjust the opening of the damper according to the cooling demand to control the flow of the refrigerant entering the heat exchanger 12.
When the chilled water of the air conditioner room in the refrigerant storage tank 16 is insufficient, the first refrigerant outlet electric door 19 and the refrigerator outlet electric door 17 are opened, and the second refrigerant outlet electric door 20 is closed, at this time, the chilled water of the air conditioner room after heat exchange is cooled by the refrigerator 18, enters the refrigerant storage tank 16, and is conveyed to the heat exchange device 12 by the refrigerant conveying pump 15 to exchange heat again.
When the environment temperature is low or the pumping capacity of the water-ring vacuum pump 13 is surplus, namely the pumping capacity of the water-ring vacuum pump is not required to be improved, the main road electric door 3 is opened in sequence, and the bypass inlet electric door 4, the bypass outlet electric door 5 and the multi-stage water sealing device outlet valve 8 are closed. And the bypass system correspondingly quits the operation, and at the moment, the vacuumizing system is restored to the main system operation state.
The utility model provides a can improve vacuum pump suction ability's evacuation system, utilize steam to meet the cold principle that can condense into water and the air does not take place the phase transition, store air conditioner room refrigerated water as the high-quality refrigerant in advance simultaneously, design one set and contain steam cooling function, hydrophobic recovery function, the evacuation system of function is stored to the refrigerant, can improve water ring vacuum pump's suction ability, prolong its life, and retrieved the steam that is taken out by the vacuum pump, working medium waste has been reduced, compared with the prior art, the power consumption of this system still less, energy-conserving effect is better.

Claims (10)

1. The utility model provides a can improve evacuation system of vacuum pump suction capacity, includes condenser and vacuum pump, the pumping of condenser is through pumped air pipeline and vacuum pump connection, its characterized in that: an air pumping pipeline between the condenser and the vacuum pump is divided into a main path system and a bypass system, wherein,
the main path system is connected with the vacuum pump through a main path valve; the bypass system is connected with the vacuum pump through a bypass inlet electric door, a heat exchange device and a bypass outlet electric door in sequence; a cold source inlet and a cold source outlet of a heat exchange device in the bypass system are respectively connected with the refrigerant loop; and the condensed water of the heat exchange device flows back to the hot well of the condenser through a drain pipeline.
2. The vacuum pumping system capable of improving the pumping capacity of a vacuum pump according to claim 1, wherein: the heat exchange device is a surface type heat exchange device.
3. The vacuum pumping system capable of improving the pumping capacity of the vacuum pump according to claim 2, wherein: the refrigerant loop comprises a first refrigerant outlet electric door, a refrigerator outlet electric door, a refrigerant storage tank, a refrigerant delivery pump and a refrigerant inlet electric regulating valve which are sequentially connected; the first refrigerant outlet electric door is connected with a cold source outlet of the heat exchange device; the refrigerant inlet electric adjusting door is connected with a cold source inlet of the heat exchange device.
4. The vacuum pumping system capable of improving the pumping capacity of the vacuum pump according to claim 3, wherein: the cold source outlet of the heat exchange device is also connected with a circulating cooling water return pipe.
5. The vacuum pumping system capable of improving the pumping capacity of the vacuum pump according to claim 4, wherein: and a water inlet of the circulating cooling water return pipeline is provided with a second refrigerant outlet electric door.
6. A vacuum pumping system capable of increasing the pumping capacity of a vacuum pump according to any one of claims 1 to 5, wherein: the refrigerant is air conditioner room chilled water.
7. The vacuum pumping system capable of improving the pumping capacity of the vacuum pump according to claim 6, wherein: the drain pipe is provided with a drain trap.
8. The vacuum pumping system capable of improving the pumping capacity of a vacuum pump according to claim 7, wherein: the vacuum pump is a water ring vacuum pump.
9. The vacuum pumping system capable of improving the pumping capacity of a vacuum pump according to claim 8, wherein: the steam trap is a multi-stage water seal device.
10. The vacuum pumping system capable of improving the pumping capacity of a vacuum pump according to claim 9, wherein: and an outlet valve of the multi-stage water seal device is arranged at an outlet of the multi-stage water seal device.
CN201920952349.3U 2019-06-24 2019-06-24 Vacuum pumping system capable of improving pumping capacity of vacuum pump Active CN210242475U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920952349.3U CN210242475U (en) 2019-06-24 2019-06-24 Vacuum pumping system capable of improving pumping capacity of vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920952349.3U CN210242475U (en) 2019-06-24 2019-06-24 Vacuum pumping system capable of improving pumping capacity of vacuum pump

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Publication Number Publication Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111473657A (en) * 2020-04-16 2020-07-31 华北电力科学研究院有限责任公司 Anti-freezing system and method for direct air-cooling condenser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111473657A (en) * 2020-04-16 2020-07-31 华北电力科学研究院有限责任公司 Anti-freezing system and method for direct air-cooling condenser

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Address after: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10

Patentee after: Guoneng Nanjing Electric Power Test Research Co.,Ltd.

Address before: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10

Patentee before: GUODIAN NANJING ELECTRIC POWER TEST RESEARCH Co.,Ltd.