Indirect air-cooling system anti-freezing return water temperature control method

A technology of air cooling system and return water temperature, which is applied to steam/steam condensers, lighting and heating equipment, etc. It can solve the problems of air-cooled radiators and radiators freezing and cracking, so as to improve economy, safety and ensure correctness Effect

Active Publication Date: 2018-08-31
济南蓝辰能源技术有限公司
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AI Technical Summary

Problems solved by technology

In these areas, the winter is cold and windy, which makes the circulating water in the air-cooled radiator easy to freeze and cause the radiator to freeze.

Method used

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  • Indirect air-cooling system anti-freezing return water temperature control method
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  • Indirect air-cooling system anti-freezing return water temperature control method

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the following description is only for explaining the present invention and not limiting its content.

[0042] For a natural ventilation indirect air cooling tower of a 660MW unit, the height of the tower is 172 meters, the outer diameter of the radiator is 152 meters, the elevation of the bottom of the tower shell is 27.5 meters, and the diameter of the tower outlet is 98.022 meters. The cooling triangles are evenly arranged outside the air inlet of the air cooling tower along the circumference of the tower. The cooling triangle is composed of two equal-sized cooling columns with an included angle of 46°. The cooling column used is 24m high, 2.67m long, and 0.133m thick.

[0043] At a position 1000m away from the tower, two online anemometers are arranged symmetrically with the tower as the center. At a position 50m away from the ...

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Abstract

The invention discloses an indirect air-cooling system anti-freezing return water temperature control method, including measuring natural wind speed and wind directions of local environment where an air cooling tower is located in an online manner; obtaining indirect air-cooling system heat load, circulating water amount, influent water temperature, and system return water temperature in an onlinemanner; determining impact of building environment around the tower and environment wind directions; forming a system temperature relative distribution database which is formed by system return watertemperature, lowest outlet water temperature of each cooling pipe bundle, and relation curves of difference values of the system return water temperature and the lowest outlet water temperature and wind speed of environment wind; calculating system critical anti-freezing return water temperature, anti-freezing margin, and anti-freezing return water temperature under given conditions. Through comprehensively considering the building environment around the tower and environment meteorological conditions, especially wind speed of environment natural wind, combined with system thermal load, circulating water flow rate, and local air distribution and water distribution uniformity, the indirect air-cooling system anti-freezing return water temperature is set to be the sum of the critical anti-freezing return water temperature and the anti-freezing margin, and economy and security of operation of an indirect air-cooling unit in winter are guaranteed.

Description

technical field [0001] The invention relates to a method for controlling the return water temperature of an indirect air cooling system, in particular to a method for controlling the temperature of the antifreeze return water of the indirect air cooling system. The invention belongs to the technical field of indirect air cooling for thermal / nuclear power plant circulating water cooling and auxiliary machine circulating water cooling. Background technique [0002] As my country's water resources become increasingly tense and its management system becomes increasingly strict, the natural ventilation indirect air cooling tower is an important cooling method for the thermal system of the power station and its auxiliary circulating water. The advantages of energy saving, water saving and environmental protection such as zero sewage discharge rate have been widely used in coal-rich and water-scarce regions such as Northwest my country and North China. In these areas, it is cold an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28B9/00F28B11/00
Inventor 杨玉杰
Owner 济南蓝辰能源技术有限公司
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