REGULATION SYSTEM OF FUEL SUPPLY IN THE FURNACE OF A COAL-FIRED DRUM BOILER Russian patent published in 2018 - IPC F23N1/00 

FIELD: power engineering.

SUBSTANCE: invention relates to thermal power engineering. System of controlling the fuel supply to the furnace of a pulverized coal-fired boiler, consisting a fuel supply device with an actuator and a regulator, to the first input of which a load controller is connected, and to the second input, the steam flow sensor, and the steam pressure sensor in the drum with the differentiator, additionally contains a feed water supply pressure sensor, an actuator position sensor, three commutation units, a load range boundary setpoint adjuster, comparison unit, a non-linear element, and two tuning drivers, the output of the differentiator being connected to the first input of the first switching unit and via the non-linear element with the second input of the first switching unit, and the output of the first switching unit is connected to the third input of the controller, the load range boundary adjuster is connected to the first input of the second switching unit, the second input of which is connected to the actuator position sensor, and the output is connected to the fourth input of the regulator, the steam flow sensor through the first configuration driver is connected to the first input of the third switching unit, the second input of which is connected via the second parameter generator to the position sensor of the supply water valve, and the output of the third switching unit is connected to the fifth input of the controller, the third inputs of the switching units being connected to the output of the comparator unit, to which inputs the load range boundary setpoint adjuster and the actuator position sensor are connected.

EFFECT: invention makes it possible to improve the accuracy of fuel supply regulation when switching for reduce loads of a pulverized coal-fired boiler, and to expand the adjustment range of load changes.

1 cl, 1 dwg