A kind of burner optimization control method and device

Abstract

The application discloses an optimum control method and device for a combustor. The optimum control method for the combustor comprises the following steps of: acquiring a smoke component numerical value of a rear gas flue, and determining an adjustment suggestive value of an overall air supply amount according to the smoke component numerical value combined with combustor combining modes as well as a boil overall air supply amount control model; and combining with a combustor individual input-boiler overall output relationship model for individual distribution of an air quantity suggestive value according to the adjustment suggestive value of the overall air supply amount, and issuing the distributed adjustment suggestive value of each individual combustor to an individual optimum operating circuit, wherein the individual optimum operating circuit controls each individual combustor to adjust the air supply amount according to a predetermined control strategy. The application further provides the optimum control device for the combustor correspondingly. According to the technical scheme provided by the application, the device operates in relatively low air, and meanwhile, the heat loss due to exhaust gas is reduced, so that the combustion process meets the demands of safety, reliability, efficiency and low pollution, and therefore, individual combustion optimum control and boiler integral combustion optimum control are achieved.

Description

technical field [0001] The present application belongs to the technical field of burner control, and in particular relates to a burner optimization control method and device. Background technique [0002] From the analysis of the basic principle of boiler combustion, the uneven distribution or poor mixing of air powder in the furnace will cause a local reducing atmosphere, accelerate the corrosion and slagging of the water wall tubes, or cause overheating of the superheater and reheater tube walls. To reduce the emission of NOx in the flue gas and reduce the heat loss of the boiler exhaust, the boiler is required to operate at a lower excess air. If the air / powder ratio can be carefully controlled, the boiler can be operated at a relatively low excess air to make the exhaust gas more efficient. The heat loss is reduced, and due to the reduction of the exhaust gas temperature, the total heat loss will be reduced more, and the energy consumption of the supply and suction fan w...

AI Technical Summary

Problems solved by technology

However, under the current operation, detection and control mode of the unit, there are the following problems that directly affect the reasonable monitoring of combustion efficiency: First, under the premise that the unit is put into AGC, since the output of the unit is in the dynamic process of adjustment at any time, the amount of fuel and air There is always a large pulsation; secondly, the state of the boiler equipment, such as air leakage and other factors, cannot reflect the real ratio working conditions in the furnace, which often makes the ratio control unable to be effectively monitored and far away from a reasonable set point; again , involving the monitoring of the combustion organization, the feedback parameters of the regulation loop, such as oxygen content, flue gas temperature, NOx emission, etc., are all measurement data of the flue gas composition at the tail of the boiler, which is far away from the main combustion area of ​​the boiler, causing the regulation loop to be put into online automatic The operation is very difficult, and the combustion adjustment mainly depends on the experience of the operating personnel "intermittently", and the adjustment is relatively random

Images