DEVICE AND METHOD FOR MANAGING THE RELATIONSHIP OF FUEL AND AIR WHEN BURNING COAL DUST IN A FURNACE INSTALLATION OF COAL POWER PLANT

摘要

1. Coal-fired power plant with a device for controlling the ratio of fuel and air when burning coal dust in a firing plant of a coal-fired power plant, which contains means for pneumatically transporting coal dust to the burners of a firing plant of a coal-fired power plant, as well as means for supplying combustion air to the burners (16) or in the furnace a chamber (15) of the combustion plant of a coal-fired power plant, while at least the following devices are located in the direction of air flow: fresh air fan (2) for intake of fresh air from the environment, a fan (3) mills for transporting part of the suctioned fresh air as transporting air for loading it with coal dust, an air heater (4) for preheating the suctioned fresh air and part of the transporting air using flue heat gases of the combustion plant of a coal-fired power plant, an air quantity control device for controlling the amount of combustion air introduced into the furnace chamber (15), an air quantity control device for controlling the amount of transporting air used for pneumatic transportation of coal dust, and measuring devices (12, 20, 21) for measuring the amount of combustion air introduced into the combustion chamber (15), and the amount transporting air used for pneumatic transportation of coal dust, and a device (7, 14) for dosed supply of a pre-selected amount of coal dust to the burners (16), while measuring (12, 20, 21)