CN-122014623-A - Dual-cooling water source system of vacuum pump of thermal power plant in hot area

Abstract

The invention relates to the technical field of auxiliary machine systems of thermal power plants, and aims to solve the problems that the temperature of chilled water rises when the ambient temperature is high, the performance, the energy consumption and the like of a vacuum pump are influenced in the prior art; the chilled water supply pipeline, the chilled water return pipeline and the chilled water supply station are connected; the outlet ends of the vacuum pumps in the cold water supply pipeline and the vacuum pump set are provided with temperature measuring points, and temperature measuring devices are arranged at the temperature measuring points; the invention can ensure that the vacuum pump can normally and efficiently run under the working condition of high temperature environment in hot areas.

Inventors

• XIE QIYU
• WANG BIN
• FENG PENGYU
• JIAN MENG
• Bu Mingjie
• LI GUANBO
• LI LI
• NIE QIAO
• LV JIAN
• YANG YUNLONG
• WANG HUA
• YUAN MINGYE
• ZHANG SHUANG
• YANG YANGUO
• Xia Shunhong
• YUAN ZHIJUN
• LIU YANLING
• FU HAO
• Sun Tingrong
• LI JIANHUA
• XU WENJIE
• ZHANG JIE
• Xiong Shuaimin
• LIU YIN
• ZHANG QICHEN
• FAN YONGGANG

Assignees

• 华能重庆两江燃机发电有限责任公司
• 中国电力工程顾问集团西南电力设计院有限公司

Dates

Publication Date

20260512

Application Date

20260312

Claims (10)

1. 1. A vacuum pump double-cooling water source system of a thermal power plant in a hot area is characterized in that: comprises a chilled water supply pipeline and a chilled water supply pipeline; one end of the chilled water supply pipeline is connected with an open circulation cooling water system, and one end of the chilled water supply pipeline is connected with a chilled water supply station; The other ends of the chilled water supply pipeline and the chilled water supply pipeline are connected to a cooling water supply main pipe; The cooling water supply main pipe is connected to the inlet end of the vacuum pump set, and the outlet end of the vacuum pump set is connected with the cooling water return main pipe; the cooling water return main pipe is respectively connected with the chilled water return pipeline and the chilled water return pipeline; the chilled water return line is connected to the open-cycle cooling water system, and the chilled water return line is connected to the chilled water supply station; The chilled water supply pipeline, the chilled water return pipeline and the chilled water return pipeline are all provided with control valves; The device is characterized in that a chilled water supply temperature measuring point is arranged on the chilled water supply pipeline, a vacuum pump cooling water outlet temperature measuring point is arranged at the outlet end of each vacuum pump in the vacuum pump set, and temperature measuring devices are arranged at the chilled water supply temperature measuring point and the vacuum pump cooling water outlet temperature measuring point.
2. 2. The dual cooling water source system for a vacuum pump of a thermal power plant in a hot area of claim 1, wherein: The control valve and the temperature measuring device are both connected to a control system.
3. 3. The dual cooling water source system for a vacuum pump of a thermal power plant in a hot area of claim 2, wherein: the chilled water supply pipeline is provided with a chilled water supply control valve.
4. 4. A thermal power plant vacuum pump dual cooling water source system according to claim 3, wherein: The chilled water return pipeline is provided with a chilled water return control valve.
5. 5. The dual cooling water source system for a vacuum pump of a thermal power plant in a hot area of claim 4, wherein: The temperature measuring device, the chilled water supply control valve, the chilled water return control valve and the chilled water return control valve are all connected to the control system.
6. 6. The dual cooling water source system for a vacuum pump of a thermal power plant in a hot area of claim 1, wherein: the chilled water supply station comprises an air-cooled screw type water chilling unit and a chilled water circulating pump, wherein a chilled water supply pipeline is connected with the air-cooled screw type water chilling unit, a chilled water return pipeline is connected with the chilled water circulating pump, and the chilled water circulating pump is connected with the air-cooled screw type water chilling unit.
7. 7. The hot area thermal power plant vacuum pump dual cooling water source system of claim 6, wherein: The chilled water supply station further comprises an expansion water make-up constant pressure unit connected to the inlet of the chilled water circulation pump.
8. 8. The hot area thermal power plant vacuum pump dual cooling water source system of claim 7, wherein: and a control valve is arranged between the expansion water supplementing constant pressure unit and the cold water circulating pump.
9. 9. The hot area thermal power plant vacuum pump dual cooling water source system of claim 7, wherein: the expansion water supplementing constant pressure unit is connected to the condensed water supplementing system.
10. 10. The dual cooling water source system for a vacuum pump of a thermal power plant in a hot area of any one of claims 1-9, wherein: the vacuum pump set comprises a Roots liquid ring vacuum pump and a water ring vacuum pump.

Description

Dual-cooling water source system of vacuum pump of thermal power plant in hot area Technical Field The invention relates to the technical field of auxiliary machine systems of thermal power plants, in particular to a vacuum pump double-cooling water source system of a thermal power plant in a hot area. Background The vacuum pump is an important device for establishing and maintaining the vacuum of the condenser of the thermal power plant, and the common vacuum pump comprises a water ring vacuum pump, a Roots liquid ring vacuum pump group and the like, so that the power consumption of the thermal power unit in normal operation is reduced, and the vacuum pumping system is usually in a combined type of the water ring vacuum pump and the Roots liquid ring pump. In the prior art, the cooling water of the vacuum pump usually adopts open-type circulating cooling water (hereinafter referred to as cold water), when the ambient air temperature in a hot area is higher (such as 37 ℃ and above), the water temperature of the cold water correspondingly rises, so that the vacuum performance of the pump is poor, the energy consumption is increased, the reliability is reduced, and the system vacuum requirement (such as the vacuum degree of a condenser is reduced) cannot be met even equipment is damaged when the vacuum pump is serious. Therefore, the cooling water and the working water are needed to be supplied to the vacuum pump under the working condition of high-temperature environment in hot areas. Disclosure of Invention The invention aims to provide a double-cooling water source system of a vacuum pump of a thermal power plant in a hot area, which aims to solve the problems that in the prior art, the cooling water of the vacuum pump adopts open circulation cooling water, when the ambient air temperature is higher, the water temperature of the open cooling water correspondingly rises, so that the vacuum performance of the pump is poor, the energy consumption is increased, the reliability is reduced, and the system vacuum requirement cannot be met even equipment is damaged seriously. The invention is realized by adopting the following technical scheme: the invention provides a vacuum pump double-cooling water source system of a thermal power plant in a hot area, which comprises a chilled water supply pipeline and a chilled water supply pipeline; one end of the chilled water supply pipeline is connected with an open circulation cooling water system, and one end of the chilled water supply pipeline is connected with a chilled water supply station; The other ends of the chilled water supply pipeline and the chilled water supply pipeline are connected to a cooling water supply main pipe; The cooling water supply main pipe is connected to the inlet end of the vacuum pump set, and the outlet end of the vacuum pump set is connected with the cooling water return main pipe; the cooling water return main pipe is respectively connected with the chilled water return pipeline and the chilled water return pipeline; the chilled water return line is connected to the open-cycle cooling water system, and the chilled water return line is connected to the chilled water supply station; The chilled water supply pipeline, the chilled water return pipeline and the chilled water return pipeline are all provided with control valves; The device is characterized in that a chilled water supply temperature measuring point is arranged on the chilled water supply pipeline, a vacuum pump cooling water outlet temperature measuring point is arranged at the outlet end of each vacuum pump in the vacuum pump set, and temperature measuring devices are arranged at the chilled water supply temperature measuring point and the vacuum pump cooling water outlet temperature measuring point. As a preferable technical scheme: The control valve and the temperature measuring device are both connected to a control system. As a preferable technical scheme: the chilled water supply pipeline is provided with a chilled water supply control valve. As a preferable technical scheme: The chilled water return pipeline is provided with a chilled water return control valve. As a preferable technical scheme: The temperature measuring device, the chilled water supply control valve, the chilled water return control valve and the chilled water return control valve are all connected to the control system. As a preferable technical scheme: the chilled water supply station comprises an air-cooled screw type water chilling unit and a chilled water circulating pump, wherein a chilled water supply pipeline is connected with the air-cooled screw type water chilling unit, a chilled water return pipeline is connected with the chilled water circulating pump, and the chilled water circulating pump is connected with the air-cooled screw type water chilling unit. As a preferable technical scheme: The chilled water supply station further comprises an expansion water make-up constant pressure unit con