Compressed air system of thermal power plant and its pressure graded supply method

A technology for thermal power plants and compressed air, applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as increased energy consumption of compressed air system equipment, reduce operating power consumption, simple switching operations, The effect of low engineering cost

Active Publication Date: 2015-10-07
NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a compressed air system of a thermal power plant and its pressure grading supply method to solve the problem of innocent increase in energy consumption of compressed air system equipment when supplying air to equipment with different air supply pressures

Method used

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  • Compressed air system of thermal power plant and its pressure graded supply method

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Embodiment Construction

[0016] Such as figure 1 As shown, a kind of thermal power plant compressed air system of the present invention comprises 9 air compressors: 3 outlet pressure 0.75MPa~0.85MPa conventional instrument factory air compressors 1, 2 operation, 1 operation standby; 5 2 sets of low-pressure air compressors with an outlet pressure of 0.40MPa~0.50MPa for ash removal, 4 in operation, and 1 in standby; 1 outlet pressure of 0.75MPa~0.85MPa for routine maintenance and standby air compressor 3 as instrument factory air and removal A spare machine for public maintenance of gray gas. Post-processing equipment There are 3 sets of post-processing equipment 4 for instrumentation, 2 for operation and 1 for standby; 5 sets of post-processing equipment for ash removal 5, 4 for operation and 1 for standby. The gas storage tanks are equipped with 2 gas storage tanks 6 for instrumentation, 2 gas storage tanks 7 for factory use, and 2 gas storage tanks 8 for ash removal.

[0017] The outlets of the 3 ...

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Abstract

The invention relates to a compressed air system of a thermal power plant and a classified pressure supply method for the compressed air system. The compressed air system comprises a plurality of instrument and station-service air compressors, a plurality of ash removal low-pressure air compressors and at least one maintenance standby air compressor; both the pressure at an outlet of each instrument and station-service air compressor and the pressure at an outlet of each maintenance standby air compressor are higher than the pressure at an outlet of each ash removal low-pressure air compressor; the outlets of the instrument and station-service air compressors are connected to an instrument air header, and the outlets of the ash removal low-temperature air compressors are connected to an ash removal header; the outlets of the maintenance standby air compressors are connected to a standby header; one end of the standby header is connected with the instrument air header by a first electric valve and a check valve, and the other end of the standby header is connected with the ash removal header by a second electric valve and a pressure reducing valve. The compressed air system and the classified pressure supply method have the advantages of capabilities of keeping the safety and the reliability of the compressed air system unchanged and saving power and energy, simplicity in standby compressor switching operation and low engineering cost and operating cost.

Description

【Technical field】 [0001] The invention relates to the technical field of compressed air systems, in particular to a compressed air system used in in-plant process systems such as thermal power plants, power stations or power workshops using coal-fired boilers. 【Background technique】 [0002] At present, domestic thermal power plants, power stations or power workshops that use coal-fired boilers mostly set up compressed air systems for the entire plant, and uniformly use air compressors as gas source generating equipment to provide gas for instrumentation, control, and maintenance in the plant. , Pneumatic conveying gas for ash removal or gas for desulfurization. The air compressor is uniformly configured in the whole plant, and the outlet pressure is 0.75MPa~0.85MPa. In addition, each unit is equipped with 1 spare air compressor for maintenance and 1 spare air compressor for operation, of which 1 spare air compressor for maintenance and 1 spare air compressor for ash remova...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D1/02F17D3/01
Inventor 俞华蔡渊
Owner NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
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