Air cooling island inlet valve anti-freezing control system

Abstract

The invention provides an air cooling island inlet valve anti-freezing control system. Inlet pipes at the back ends of inlet valves of middle-row and far-end-row air cooling draught fan sets are connected with first exhaust pipes, when all air cooling draught fans in one row of middle-row or far-end-row air cooling draught fan set are stopped, drain valves of the air cooling draught fan sets and inlet valves on the first exhaust pipes are controlled to be closed, first valves on the first exhaust pipes of the air cooling draught fan sets are opened and used for exhausting moisture leaked from the inlet valves and entering inlet pipes through the first exhaust pipes, the leaked steam are prevented from coagulating and freezing after meeting cold, and air cooling island inlet valve frost cracks and condensate collection tank frost cracks which are caused consequently are avoided.

Description

technical field [0001] The invention relates to the technical field of power plant unit equipment, in particular to an antifreeze control system for an air-cooled island steam inlet valve. Background technique [0002] At present, in order to save water, thermal power plants generally use air cooling systems. Although the air-cooling system has the advantages of small footprint and water saving, its climate adaptability is weak. In the alpine regions, such as Xinjiang, Inner Mongolia, and the three eastern provinces, due to the long winter time and low temperature, the air-cooling fan is prone to freezing accidents. , and even cause the unit to be forced to shut down in severe cases. [0003] During the outage of the direct air-cooling unit in winter in the alpine region, the insufficient steam volume of the air-cooling tube bundle and the large fluctuation of the air-cooling intake steam can easily lead to local freezing and damage of the air-cooling tube bundle. Once the...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides an air-cooled island steam inlet valve antifreeze control system to solve the problem of freezing and cracking of the air-cooled island steam inlet valve during the winter air-cooled island shutdown in alpine regions

Images