A method, system and equipment for dynamically optimizing the economical oxygen content of a coal-fired boiler

Abstract

The invention discloses a dynamic optimization method, system and equipment for the economical oxygen content of a coal-fired boiler, comprising the following steps: calculating the change rate of the relative coal consumption for power supply of the coal-fired boiler; inputting it into a conversion function F1(x) for conversion ; Calculate the change rate of the actual operating oxygen amount of the coal-fired boiler; input it into the conversion function F2(x) for conversion, according to the change rate of the converted relative coal consumption for power supply and the converted rate of change of the actual operating oxygen amount of the boiler Obtain the dynamic target value of online CO concentration control; calculate the actual concentration of CO after boiler combustion; obtain the set value of oxygen amount according to the dynamic target value of online CO concentration control and the actual concentration of CO after boiler combustion. The method calculates the dynamic target value of online CO concentration control and the actual concentration of CO after the boiler is burned, and obtains the set value of the oxygen amount through the PID calculator; the present invention can realize the dynamic optimization of the boiler operation oxygen amount without going through a neural network. , improve the economy of boiler unit operation.

Description

technical field [0001] The invention relates to the technical field of online optimization of coal-fired boilers, in particular to a method, system and equipment for dynamically optimizing the economical oxygen content of coal-fired boilers. Background technique [0002] At present, boilers are widely used in thermal power stations. Controlling the oxygen content of boilers is an important part of power production. The oxygen content of boilers not only affects the thermal efficiency of boilers, but also affects the power consumption of boiler feeders and induced draft fans. , steam temperature, desuperheating water, NOx generation concentration and other parameters, and the amount of oxygen also affects the flue gas temperature distribution of the boiler and the atmosphere of the flue gas, which has an impact on slagging, coking and high-temperature corrosion, etc. The change of fly ash combustible content has great influence on Wear on the heating surface is also affected....

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method, system and equipment for dynamically optimizing the economical oxygen amount of a coal-fired boiler, which are used to solve the technical problem of poor control adaptability existing in the neural network technology used in the dynamic optimization of the oxygen amount in the prior art

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