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Cleaning type gas collecting pipe for thermal recovery coke oven

A heat recovery and gas collecting pipe technology is applied in coke ovens, coke oven heating, dry distillation gas discharge devices, etc. The effect of shortened coking time, low thermal shrinkage, and increased evaporation

Inactive Publication Date: 2009-01-07
山东日照焦电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Cleaning type gas collecting pipe for thermal recovery coke oven

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0015] As shown in the figure, the air collecting pipe is composed of an outer casing 1 and an inner lining, wherein the inner lining is composed of a primary insulation layer 2 and a secondary insulation layer 3 located between the primary insulation layer 2 and the casing 1, and the primary insulation layer 2 It is made of anti-carburization mullite bricks stacked with high-temperature adhesive. The amount of the above-mentioned high-temperature adhesive is 0.44 kg for each anti-carburization mullite brick. Alumina fiber cotton 4 and its lower part of asbestos-free calcium silicate 5 are bonded and solidified by a high-alumina binder. The amount of the above-mentioned high-alumina binder is 1 kg per square meter of insulating silicate material. . Aluminum silicate fiber cotton or asbestos-free calcium silicate can also be directly selected for the above-mentioned ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B27/06
Inventor 张德田刘峰王宜民薛建义邢斌刘光启秦海涛赵树奎王毅志杨振强
Owner 山东日照焦电有限公司
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