Adjusting and optimizing method of ratio-controlled combustion system

Abstract

The invention discloses an adjusting and optimizing method of a ratio-controlled combustion system. The adjusting and optimizing method includes the following steps: S1 the whole ratio-controlled combustion system is divided into a plurality of combustion areas, and different temperatures are set for the combustion areas for combustion control; S2 coal gas flow is adjusted; S3 air flow is adjusted; and S4 flue gas content is measured: a portable flue gas analyzer is adopted to measure contents of oxygen and carbonic oxide which are contained in flue gases of each burner arranged in the same combustion area, the coal gas flow and the air flow are readjusted if the difference value of the measurement valve and the originally set value is larger than the preset value, and adjusting and optimizing are completed if the measurement valve is identical to the originally set value. The adjusting and optimizing method especially aims at the ratio-controlled combustion system, and is simple and convenient to operate and convenient to popularize; and integrally adjusts and optimizes all the combustion areas, can ensure that the burners of all the combustion areas are identical in power and combustion state, enables temperature in a furnace to be uniformly controlled, and improves control accuracy in low load.

Description

technical field [0001] The invention relates to the field of optimization of a gas combustion system, in particular to the optimization of a gas combustion system with proportional control. Background technique [0002] The combustion system with proportional control is mainly used in the annealing furnace. The main parameters used to evaluate the operation status of the annealing furnace are: the output of the furnace, the fuel consumption, the thermal efficiency of the furnace, etc. At present, in some iron and steel enterprises, due to various reasons, the annealing furnace Lack of understanding of the importance of thermal performance and problems such as equipment, technology, and cost. Many annealing furnaces have been produced for many years, but their combustion systems have never been tuned, resulting in insufficient heating capacity of many annealing furnaces. It will lead to the decrease of furnace output, lower thermal efficiency, serious energy waste and excessi...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a combustion system specially for proportional control, aiming at the defect that the traditional combustion system tuning method in the prior art cannot be applied to the combustion system under proportional control, and the tuning effect is not good. Carry out overall optimization of each combustion area to ensure that the burner power and combustion state of each combustion area are the same, so that the temperature control in the furnace is uniform, the small flow rate of air and gas is controlled, and the combustion system optimization method of precise proportional control

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