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An air-cooled island steam inlet valve antifreeze control system

A control system and steam inlet valve technology, applied in steam/steam condensers, lighting and heating equipment, etc., can solve problems such as freezing and cracking of air inlet valves in air-cooled islands

Active Publication Date: 2019-02-15
XINTE ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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  • An air-cooled island steam inlet valve antifreeze control system

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Embodiment Construction

[0020] The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0021] The invention proposes an antifreeze control system for the steam inlet valve of an air-cooling island. By arranging a first exhaust line connected to the vacuum pump at the rear end of the steam inlet valve of the air-cooling fan group in the middle row and the remote row, all the out-of-service intermediate The discharge of water vapor in the steam inlet pipeline of the row and / or remote row air cooling fan units can fundamentally solve the problem of freezing and cracking of the i...

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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 a steam inlet valve of an air-cooled island. 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 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 shutdown of the direct air-cooled unit in winter in the alpine region, due to the insufficient steam volume of the air-cooled tube bundle and the large fluctuation of the air-cooled steam intake, it is very easy to cause local freezing and damage of the air-cooled tube bund...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28B9/00F28B11/00
Inventor 李鹏曾琦何武强
Owner XINTE ENERGY