Cleaning type gas collecting pipe for thermal recovery coke oven

Abstract

The invention discloses a clean thermal recycling coke oven gas collecting pipe which belongs to the industrial kiln accessory field and comprises an outer casing and a liner. The gas collecting pipe is characterized in that the liner is composed of a primary adiabatic layer and a secondary adiabatic layer which is arranged between the primary adiabatic layer and the outer casing. The primary adiabatic layer is made of carburizing resistance mullite bricks which are packed through high temperature binders. The secondary adiabatic layer is made of insulation silicate material solidified through high aluminum binders. Compared with the prior art, the clean thermal recycling coke oven gas collecting pipe has the characteristics of light weight, high temperature resistance, low heat conduction, etc.

Description

technical field [0001] The invention relates to an accessory of an industrial kiln, in particular to a clean heat recovery coke oven gas collecting pipe. Background technique [0002] The gas collecting pipe is a gas conveying device used to collect coke oven exhaust gas and then use the waste heat of the exhaust gas to generate electricity. At present, the lining material of the gas collecting pipe is mostly made of zirconium-containing ceramic fiber folded blocks, which are fixed to the carbon steel shell by high-temperature resistant stainless steel anchors. Above, the design heat-resistant temperature is 1250°C, but due to insufficient combustion of part of the raw coal gas, it enters the branch pipe of the gas collection pipe through the ascending flue and the bridge pipe, and secondary combustion occurs, causing the temperature of the gas collection branch pipe to exceed the design temperature and reach 1300°C , resulting in volume shrinkage of the zirconium-containing...

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Problems solved by technology

[0002] The gas collecting pipe is a gas conveying device used to collect coke oven exhaust gas and then use the waste heat of the exhaust gas to generate electricity. At present, the lining material of the gas collecting pipe is mostly made of zirconium-containing ceramic fiber folded blocks, which are fixed to the carbon steel shell by high-temperature resistant stainless steel anchors. Above, the design heat-resistant temperature is 1250°C, but due to insufficient combustion of part of the raw coal gas, it enters the branch pipe of the gas collection pipe through the ascending flue and the bridge pipe, and secondary combustion occurs, causing the temperature of the gas collection branch pipe to exceed the design temperature and reach 1300°C , resulting in volume shrinkage of the zirconium-containing ceramic fiber folded block, resulting in gaps, and the high-temperature flue gas burns the stainless steel anchor through the gap, causing the zirconium-containing ceramic folded block to fall off, causing the carbon steel shell to burn, and causing low-temperature air to escape into the air collecting pipe , thereby reducing the temperature of the flue gas entering the boiler, reducing the evaporation of the boiler, and due to the leakage of the gas collecting pipe, the suction of the coke oven is reduced, so the coking time of coke is prolonged, which affects the output of coke

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