Strategy and Application of Control for Feed Water Main Pipe Unit
In order to overcome the coupling effect between boiler drum water level control and feed water pressure control in multi-furnace parallel main pipe feed water supply system,this paper decouples the water level control process from the feed water pressure control process,then adopts the control strategy of boiler upper water regulator to adjust drum water level and variable frequency feed pump to adjust the pressure of jellyfish tube.In the water level control,the cascade three-impulse regulation mode of main regulation and secondary regulation is adopted to respond to the external flow demand and correct the internal disturbance of drum water level in time.In the pressure control of the feedwater tube,the flexible selection of the adjustable quantity,the variable parameters of the controller and the application of self-balanc-ing module and bias can realize the fast and effective regulation of the feedwater pressure.
main pipe unitfeed water controldrum water levelpressure of main pipe
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