Automatic control system vacuum in the firebox top plate boiler drum

摘要

The invention relates to heat power engineering and can be used to improve the quality of the vacuum regulation in the upper part of the furnace drum boilers. In the known system of automatic control of the vacuum in the upper part of the furnace drum boiler, comprising a drum boiler, the vacuum sensor mounted at the top of its firebox, series-connected, the vacuum regulator configured as a proportional-integrating unit, the regulating unit and the exhauster, the suction nozzle attached to the gas duct of the boiler drum and removing it from the flue gases of the furnace, the vacuum setpoint, the output connected to the first input of the vacuum regulator to the second input which is connected the vacuum sensor output correcting unit inserted between the output of the vacuum regulator and the input of the regulating unit; Technical result: improved quality vacuum regulation in the upper part of the furnace drum boiler, which is expressed in the fact that achieved zero static vacuum control error minimum possible dynamic vacuum control error when developing the control action, the minimum possible dynamic vacuum control error to a step change of fuel expenses and air entering the furnace drum boiler, the maximum possible speed at a vacuum regulation. Improving the quality of regulation underpressure in the upper part of the furnace of the boiler drum provides increased fuel efficiency of the combustion process in its furnace.