Coke Oven Combustion Chamber Fire Passage Structure Realizing Low NOx Combustion
A technology of low nitrogen oxides and vertical flue, which is applied in the field of coke ovens to achieve the effects of suppressing the formation of NOx, reducing the concentration of NOx, and avoiding rapid and violent combustion
Active Publication Date: 2019-08-27
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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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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[0022] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0023] Such as Figure 1-Figure 4 As shown in the present invention, a low-nitrogen oxide combustion coke oven combustion chamber vertical fire channel structure, the coke oven combustion chamber is composed of a plurality of vertical fire channels 1, and every two vertical fire channels 1 form a double-connected vertical fire channel The top of the double fire passage is connected through the spanning hole 12, and the bottom is connected through the exhaust gas circulation hole 13; the bottom of each fire passage 1 is respectively provided with a gas passage 3 of a rich gas brick, a bottom outlet 5 of a lean gas and a bottom outlet 9 of combustion air , the fireway partition wall 2 is provided with multi-stage combustion air outlets 10 and multi-stage lean gas outlets 6 along the height direction; the elevation of the lean gas bottom outlet 5 is ...
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The invention relates to a vertical flue structure of a coke oven combustion chamber for achieving low nitrogen oxide combustion. The elevation of a bottom outlet of a low-grade gas is higher than that of the bottom outlet of combustion-supporting air; the elevation of the bottom outlet of the combustion-supporting air is lower than that of a bottom surface of a waste gas circulation hole or consistent with that of the waste gas circulation hole; various combustion-supporting air outlets in multiple segments of combustion-supporting air outlets are different from various low-grade gas outlets in multiple segments of low-grade gas outlets in elevation and the elevation of the final combustion-supporting air outlet is greater than that of final low-grade gas outlet; the amount of the gas supplied from the final low-grade gas outlet is 1-50% of the gross of the supplied gas; and the amount of the combustion-supporting air supplied from the final combustion-supporting air outlet is 1-50% of the gross of the supplied combustion-supporting air. Multiple mild and deep low nitrogen oxide combustion modes of low-oxygen dilution combustion, rich and lean combustion, staged combustion of fuel and air-staged combustion are achieved, generation of NOx in the combustion process of a vertical flue is effectively inhibited and higher environmental protection requirements are met.
Description
technical field [0001] The invention relates to the technical field of coke ovens, in particular to a coke oven combustion chamber vertical flue structure capable of realizing low nitrogen oxide combustion. 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 si...
Claims
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IPC IPC(8): C10B21/10C10B21/18
Inventor 景殿策严国华刘洪春王满
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC