Combustion adjusting method for corner tangential pulverized coal furnace based on 3H air volume control method model

Abstract

The invention discloses a four-corner tangential pulverized coal furnace combustion adjusting method based on a 3H air volume control method model, and relates to the technical field of thermal power generation. According to the method, five models including a coal quality coefficient model, an aerodynamic model, an ignition dynamic model, a flue gas temperature model and a parameter comparison model are established, and a coal quality parameter model serves as a basis, and the aerodynamic model serves as a basic framework; a flue gas temperature model, an ignition state model and a parameter comparison model are used as actual references for correction, different grading air distribution of the same-angle vertical face, the same-layer cross section and the same-boiler three-dimensional face is achieved, the concept of a 3H air volume control method is put forward based on combustion adjustment, stable combustion in the boiler is achieved through air distribution adjustment, and the combustion efficiency is improved. And a stable flue gas temperature field and an aerodynamic field are formed.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a combustion adjustment method for a four-corner tangential circular pulverized coal furnace based on a 3H air volume control method model. Background technique [0002] The boiler combustion adjustment in the four-corner tangential pulverized coal furnace is mainly to carry out air distribution and powder distribution. By controlling the negative pressure of the furnace, oxygen content, fly ash combustibles, exhaust gas temperature, sulfur dioxide and nitrogen oxide emissions within the normal range, the boiler combustion stability is ensured. . Under the premise that the unit load, equipment condition and coal quality parameters cannot be controlled, the operator can only adjust the operation and combustion of the pulverizing system by controlling the boiler air distribution adjustment and reasonable switching. [0003] The original combustion adjustment contr...

AI Technical Summary

Problems solved by technology

Under the premise that the unit load, equipment status and coal quality parameters cannot be controlled, the operator can only adjust the combustion by controlling the boiler air distribution adjustment and reasonable switching and cutting of the pulverizing system.

[0003] The original combustion adjustment control method relies on the original boiler operation control method, which uses the previous combustion adjustment test report as a theoretical basis. These control methods bring too many uncertain factors, such as reaction control lag, data distortion, and failure to reflect the combustion of various parts. Combustion conditions in the reactor area, relatively few working conditions, and the inability to dynamically seek the best value, etc.

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