Coal-fired power plant boiler variable-load air-coal matching control device and method

The invention discloses a coal-fired power plant boiler variable-load air-coal matching control device and method. The coal-fired power plant boiler variable-load air-coal matching control device comprises a furnace hearth, a coal mill, a coal feeder, an air supplier, a primary air-powder tube, a temperature measuring device, an air speed measuring device, a resistance measuring device, a coal feeding instruction and an air supply instruction. In order to solve the problem that the oxygen volume and the NOx concentration fluctuate sharply during the coal-fired power plant boiler variable-loadprocess, the coal-fired power plant boiler variable-load air-coal matching control device is provided; according to the coal-fired power plant boiler variable-load air-coal matching control device, anaccurate time difference between the coal powder discharging operation and the coal feeding operation of the coal mill during the load variation of a boiler as well as a corresponding variation curveare acquired by utilizing