Coke oven combustion chamber flue with optimized structure

Abstract

The invention relates to the field of combustible gas downdraft coke ovens, in particular to a coke oven combustion chamber flue with an optimized structure. The flue comprises tubular bricks and a partition wall, and is characterized in that: the flue is realized by lengthening the travel of a combustible gas in the flue and forming a combustible gas passage in the flue along the travel, wherein the partition wall and the tubular bricks form a semi-enclosed structure along a horizontal direction; the partition wall is provided with a gas flow passage above the tubular bricks along a vertical direction; and the gas flow passage is provided with a groove-shaped gap with the width of between 10 and 35mm and the height of between 10 and 10,000mm. Compared with the prior art, the flue has the advantages that: because a gas outlet has a narrow groove structure, the diffusion speed of the gas is limited; the contact area of the gas and a combustion-supporting gas at the bottom of the flue is reduced, so the combustible gas is diffused from bottom to top along the groove-shaped gap, the combustion-supporting gas is excessively distributed in the flue and the flame is elongated, which is favorable for improving the uniformity of the temperature distribution in the flue; and meanwhile, because the partition wall becomes wider, the structural strength of a coke oven combustion chamber can also be improved.

Description

technical field [0001] The invention relates to the field of combustible gas down-spray coke ovens, in particular to a coke oven combustion chamber vertical flue with an optimized structure. Background technique [0002] At present, for combustible gas down-injection coke ovens, measures to improve the uniformity of vertical temperature distribution in the vertical flue mainly include exhaust gas circulation, high and low lamp caps, combustible gas and combustion-supporting gas segmented supply, etc. The coke oven combustion using the above measures The indoor fireway partition wall (2) and the down-sprayed gas pipe brick (1) are basically in a relatively independent state, see the attached image 3 , attached Figure 4 , in this case, there is no constraint after the heating gas enters the vertical flue, so it is easy to spread out at the bottom of the vertical flue, which increases the contact area between the heating gas and the combustion-supporting gas, resulting in a v...

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Problems solved by technology

[0002] At present, for combustible gas down-injection coke ovens, measures to improve the uniformity of vertical temperature distribution in the vertical flue mainly include exhaust gas circulation, high and low lamp caps, combustible gas and combustion-supporting gas segmented supply, etc. The coke oven combustion using the above measures The indoor fireway partition wall (2) and the down-sprayed gas pipe brick (1) are basically in a relatively independent state, see the attached image 3 , attached Figure 4 , in this case, there is no constraint after the heating gas enters the vertical flue, so it is easy to spread out at the bottom of the vertical flue, which increases the contact area between the heating gas and the combustion-supporting gas, resulting in a vertical The temperature at the bottom of the flue rises rapidly, but in the diffusion of the temperature field, due to the suction of the chimney or the increase in the height of the flue, the distribution of the temperature field along the vertical direction of the flue is uneven, and the final result is that the bottom of the carbonization chamber is overheated and carbonized. In addition, there is another problem with this structure: the concentration of combustible gas at the bottom of the vertical flue is too high and the combustion is insufficient, which increases the energy consumption of coke oven production, which is not conducive to energy saving and emission reduction

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