| With the change of the national energy policy,energy saving and emission reduction has become a social consensus.Thermal power enterprises are the large energy consumption,the indicators of the unit operation not only directly affects the energy consumption,but also affect the economic efficiency of enterprises.In the daily production process,fan,water pump,air compressor and other auxiliary equipment as the main power equipment,large capacity,high power consumption,and these devices are long-term continuous operation,load changes are often in low load and variable load operating condition,the motor speed operation efficiency is low,a large amount of electrical energy waste so,energy saving is becoming a trend.Guohua Beijing cogeneration branch Water supply system belonging to the cell system operating mode,equipped with two fixed speed electric pump and a hydraulic coupling speed pump,The normal operation is "a certain tone" or "two fixed".The major issues in the operation is the boiler feed water pressure higher in low load(below 600 t / h reached more than 14.5MPa),not only increased the feed water system adjustment valve wear,also easily lead to sudden failure main feed water door open,affecting the safe operation of the unit.This paper analyzes the principle and characteristics of motor speed control technology,and according to the actual operating conditions of research Guohua Beijing cogeneration branch water supply system,anglicizing the problems of high pressure water supply and high consumption,determining the transformation plan,For a fixed speed pump with hydraulic coupler in unit maintenance,solving the problems;After transformation,optimizing the energy saving operation measures on water pump in winter heavy load period,low load period and single furnace operation,under the premise of ensuring the safe operation of the unit,reduced the operating costs,improved the water supply system safety and adjustability. |
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