A structure and method for segmentally feeding air for coke oven heating

Abstract

The invention relates to a sectionalized air feeding structure and method for coke oven heating. The structure comprises a lateral air feeding system and a down-jet air feeding system. The lateral air feeding system comprises an exhaust gas shutter, a heat storage chamber, a chute and a vertical flue which are successively communicated; and the down-jet air feeding system is composed of a compressed air pipeline, a ball valve, a basement horizontally-arranged pipeline, an automatic flow control valve, a down-jet pipe and a brick air channel which are successively connected, wherein the outlet of the brick air channel is arranged in the vertical flue of a combustion chamber. The sectionalized air feeding structure employs the lateral air feeding system and the down-jet air feeding system to realize sectionalized air feeding, can accurately control the quantities of air entering the outlet of each segment, effectively reduces the discharging amount of NOX in coke oven flue gas, and is beneficial for improving the utilization rate of energy, saving energy and reducing consumption; moreover, a traditional compound heating coke oven utilizing lean gas for heating can be improved, investment cost is reduced and a construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of coke oven heating, in particular to a structure and method for segmentally feeding air for coke oven heating with lean coal gas as a heat source. Background technique [0002] With the enhancement of environmental protection awareness, NO in flue gas during coking oven coking X Emission control standards are becoming more and more stringent, and the latest national standards require that NO in the coke oven production process X The emission is not more than 500mg / m 3 , while the emission standards for Class I areas are more stringent. For this reason, coking design and production enterprises have adopted various methods to reduce NO in flue gas X emissions. [0003] Currently, NO X The emission control methods are mainly divided into pre-control and post-control, that is, source control and post-generation denitrification treatment. Current research shows that NO in the production X Mainly from the...

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Problems solved by technology

But this lower NO X Due to the frequent replacement of catalysts during production and operation, there are disadvantages such as high investment costs, heavy labor, and large floor space, which are not conducive to the improvement of corporate profits.

[0005] In practical application, the coking ovens of many iron and steel enterprises basically adopt reheating coke ovens, but in normal production, only the gas-lean system is basically used for coking, and the gas-rich heating system is generally only used in the initial stage of production, after that Basically in an idle state, resulting in a great waste of equipment

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