Study on the control strategy of economical operation in industrial boiler

摘要

To solve the problem of low thermal efficiency, high temperature of waste gas and high amount of carbon content in cinder and fly ash of coal-fired industrial steam boiler, at the premise of safe operation, the radiation energy signal inside furnace was introduced to research the control strategy of industrial boiler economical operation. As the radiation energy signal can provide real-time and complete reflection of combustion rate inside the stave, the optimal control loop of air-coal ratio was established to acquire the best radiation energy signal. And then according to the air-coal ratio to adjust the excess air ratio to high the thermal efficiency and low the heat losses. The results indicate that the boiler can stability operate in the optimal level and the economy obviously improve, achieve significant energy savings and pollution reduction, after the optimally adjusts the air-coal ratio.