提高冷却塔效率的可调引风换热和填料差异化布置技术

Adjustable Air-induced Heat Transfer and Fillers Differentiated Arrangement Technology for Cooling Tower Efficiency Enhancement

针对闭式湿冷火力发电机组冷却塔换热性能差、冬季挂冰严重的问题,为强化冷却塔换热途径,本文提出一种可调引风换热和填料差异化布置技术。利用可调引风换热装置,根据环境风向、风速自动调整冷却塔进风量,优化冷却塔流场,提高冷却塔换热能力;充分考虑冷却塔内部流场差异,采用淋水填料差异化布置方式,提升冷却塔换热效果。将该技术在某电厂150MW机组冷却塔进行实际应用,冷却塔冷却能力提高了约7%,机组供电煤耗降低了约1.5g/(kW·h)。

In order to deal with the cooling tower problem of poor heat transfer performance and severe winter ice hanging for closed wet thermal power generation unit, an adjustable air-induced heat transfer and fillers differentiated ar- rangement technology is proposed to enhance cooling tower heat transfer way. Through the installation of adjustable air-in- duced heat transfer equipment, the ventilation of cooling tower is automatically adjusted according to the environmental wind direction and wind speed, thus the cooling tower flow field is optimized and the thermal capacity of the cooling tower is en- hanced. Based on full consideration differences in the flow field inside the cooling tower, the differentiated arrangement of water drenching fillers is adopted in order to promote the cooling tower heat transfer effect. The proposed technology is used in cooling tower of 150MW unit, the cooling performance of the cooling tower is increased by about 7%, and the coal con- sumption of the unit is reduced by about 1.Sg/（kW.h）.