A Segmentally Heated Coke Oven Combustion Chamber Flame Passage Structure

Abstract

The invention relates to a vertical flame path structure for a combustion chamber of a coke oven for heating in segments. The combustion chamber of the coke oven is composed of a plurality of vertical flame paths; every two vertical flame paths form a duplex vertical flame path; combustion air bottom outlets and lean coal gas bottom outlets are formed at the bottom of the vertical flame paths; multiple sections of combustion air outlets and multiple sections of lean coal gas outlets are formed along the height direction of a vertical flame path separating wall; each section of combustion air outlet in the multiple sections of combustion air outlets and each section of lean coal gas outlet in the multiple sections of lean coal gas outlets are at different elevation; the elevation of the last section of combustion air outlet is higher than the elevation of the last section of lean coal gas outlet. According to the invention, the height direction positions of each section of combustion air outlet and each section of lean coal gas outlet and the feeding volumes of each section of combustion air and coal gas are limited, so that the purpose of restraining NOx generation in a vertical flame path combustion process can be achieved and the vertical flame path structure can meet higher environmental protection requirement.

Description

technical field [0001] The invention relates to the technical field of coke ovens, in particular to a vertical flue structure of a coke oven combustion chamber in a reheating chamber. Background technique [0002] The uppermost part of the modern coke oven body is the furnace roof, and below the furnace roof are the combustion chambers and carbonization chambers arranged alternately. The lower part of the furnace body has a regenerator and a ramp area connecting the regenerator and the combustion chamber. Each regenerator The small flue in the lower part is connected with the flue through an exchange switch. The flue is arranged in the coke oven foundation or on both sides of the foundation, and the end of the flue leads to the chimney. Therefore, the coke oven is composed of three chambers and two regions, namely carbonization chamber, combustion chamber, regenerator, chute area, furnace top area, and basic part. The combustion chamber is on both sides of the carbonizatio...

AI Technical Summary

Problems solved by technology

At present, in order to improve the uniformity of heating in the vertical direction in the vertical flue and meet the production load requirements, the existing down-sprayed coke ovens in my country have adopted methods such as high and low lamp caps, exhaust gas circulation, and sectional supply of combustion-supporting gas, but the nitrogen oxides in the combustion process are suppressed. There is still room for improvement in generation

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