火力发电循环泵改双速节能改造.doc

火力发电厂循环泵电机改双速 冯振海 禹 扬 大唐灞桥热电厂 710038 【摘要】：【关键词】： Abstract：Xi an is located in the northwest, the summer and winter temperature change is bigger, a direct impact on open circulating water temperature. As the condenser circulating water cooling medium, water temperature change with environment temperature is larger. High environmental temperature, the circulating water temperature will increase; Ambient temperature is low, the circulating water temperature decreases, and under the condition of invariable in generator power, drive the amount of exhaust steam turbine steam engine after work (heat source heat) basic remains the same, so that things which are needful to the cool air circulation water can be total amount according to seasonal changes in temperature adjustment, combined with our factory belongs to the heating power, hot summer, winter load is large, the runtime in winter and summer, entering the condenser heat steam vary more than 10 times, thus circulating water in winter than the summer circulation water to reduce about 12000 t/h, so by transform the circulating water pump motor instead of adjustable speed motor or equipped with frequency conversion device, according to the environmental temperature change, and the characteristics of the operation mode, change the circulating water pump motor power, corresponding to the circulating pump motor output corresponding to reduce, not only can satisfy the turbine operating conditions, because can also reduce the amount of circulating water and further reduce the motor output, so as to achieve auxiliary power saving, coal saving, the purpose of reducing environmental pollution. Key words: Circulating pump motor Double speed and energy saving transform 前言： 大唐陕西发电有限公司灞桥热电厂2×125MW机组配置4台44LKXD-25循环水泵，电机功率710KW， 定速运行方式，夏季运行方式为3台运行、1台备用。由于灞桥热电厂地处西北地区，不同季节温差较大，冬季采暖期间两台机组运行，一台循环泵运行即能满足需要，但若该循环泵跳闸易造成两台机组停运，故灞桥热电厂冬季采暖期间一直运行两台高速循环水泵。而该运行方式会造成循环水蒸发量增大，厂用电率、发电煤耗升高导致发电成本增加。根据灞桥热电厂季节温度特点和运行方式特点，经过研究可采取循环水泵电机改为可调速电机或改造加装变