Cleaning type gas bridge pipe for thermal recovery coke oven

Abstract

The invention discloses a clean thermal recycling coke oven bridge pipe which belongs to the industrial kiln accessory field and comprises an outer casing and a liner. The pipe is characterized in that the liner is composed of a clay brick layer, an aluminosilicate insulation carpet layer and an insulation brick layer. The clay brick layer is arranged at the most inner layer of the bridge pipe. The aluminosilicate insulation carpet layer is arranged on the external surface periphery of the clay brick layer. The insulation brick layer is arranged between the outer casing and the aluminosilicate insulation carpet layer. Compared with the prior art, the clean thermal recycling coke oven bridge 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 type heat recovery coke oven bridge tube. Background technique [0002] The bridge tube is the key control part of the flue gas flow in coke oven production. At present, the lining material of the bridge tube is mostly made of zirconium-containing ceramic fiber folded blocks, which are fixed on the carbon steel shell with high-temperature resistant stainless steel anchors. The design heat-resistant temperature is 1250°C , but because part of the raw coal gas is not fully burned, it enters the bridge tube through the ascending fire channel, causing secondary combustion, causing the temperature of the bridge tube to exceed the design temperature, reaching 1300 ° C, resulting in volume shrinkage of the zirconium-containing ceramic fiber folded block, resulting in gaps , while the high-temperature flue gas burns the stainless steel anchor through the gap, causing the zirc...

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Problems solved by technology

[0002] The bridge tube is the key control part of the flue gas flow in coke oven production. At present, the lining material of the bridge tube is mostly made of zirconium-containing ceramic fiber folded blocks, which are fixed on the carbon steel shell with high-temperature resistant stainless steel anchors. The design heat-resistant temperature is 1250°C , but because part of the raw coal gas is not fully burned, it enters the bridge tube through the ascending fire channel, causing secondary combustion, causing the temperature of the bridge tube to exceed the design temperature, reaching 1300 ° C, resulting in volume shrinkage of the zirconium-containing ceramic fiber folded block, resulting in gaps , while the high-temperature flue gas burns the stainless steel anchor through the gap, causing the zirconium-containing ceramic folding block to fall off, causing the carbon steel shell to burn, causing low-temperature air to escape into the bridge tube, thereby reducing the temperature of the flue gas entering the boiler and reducing the temperature of the boiler. Evaporation, and because of the leakage of the bridge tube, 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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