Coke oven gas waste heat recovery system

Abstract

The invention relates to a coke oven gas waste heat recovery system. The coke oven gas waste heat recovery system comprises a split-type heat pipe, the split-type heat pipe comprises an evaporator device and a condenser, the evaporator device comprises a heat absorbing surface region formed by a coke oven gas guiding pipeline, the condenser comprises a steam pocket and a condenser pipeline arranged in the steam pocket, the inlet end of the condenser pipeline is communicated with a working medium outlet of the evaporator device via a gas working medium pipeline, the outlet end of the condenser pipeline is communicated with a working medium inlet of the evaporator device via a liquid working medium pipeline, a fill cavity is arranged in the heat absorbing region, and a phase-change material layer is arranged in the heat absorbing region. The coke oven gas waste heat recovery system has the advantages that by means of reconstructing the coke oven gas guiding pipeline (an ascension pipe and a bridge pipe) into the evaporator with the split-type heat pipe, coke oven gas waste heat can be recovered by the split type heat pipe; by means of arranging the phase-change material layer in the heat absorbing region, generation of periodic heat shock to a waste heat recovery device can be avoided, and waste heat recovery and production stability are improved effectively.

Description

technical field [0001] The invention relates to coke oven gas sensible heat recovery technology, in particular to a coke oven gas waste heat recovery system. Background technique [0002] The coke oven is a large-scale kiln that heats the coking coal in isolation from the air and produces coke by dry distillation. During the coking process, a large amount of coke oven gas and coke oven flue gas that is used for heating and exhausted are generated at the same time. The heat output from the coke oven is Among them, the sensible heat of coke oven gas accounts for about 36%, the sensible heat of baked red coke accounts for about 37%, the heat taken away by coke oven flue gas accounts for about 17%, and the heat dissipation on the surface of the furnace body accounts for about 10%. The coke oven gas produced by the coke oven flows into the gas collecting pipe through the ascending pipe and the bridge pipe at the top of the coking chamber. Usually, ammonia water is sprayed into th...

AI Technical Summary

Problems solved by technology

The coke oven gas produced by the coke oven flows into the gas collecting pipe through the ascending pipe and the bridge pipe at the top of the coking chamber. Usually, ammonia water is sprayed into the bridge pipe to cool the coke oven gas at about 650~700°C to 84°C, which not only wastes a lot of coke oven gas Sensible heat of gas also increases ammonia treatment capacity

Scholars at home and abroad have studied the recovery of sensible heat of coke oven gas for many years but have not yet achieved success. One of the reasons is that the temperature of the gas is about 700 °C during the coking process, and the temperature of the riser and bridge tubes during coking and coal charging Sudden drop in temperature will cause periodic thermal shocks to the waste heat recovery device, resulting in damage and even production accidents

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