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Cold wall liner for entrained bed gasifier and device including same

A cold-wall gasification furnace technology, which is applied in the gasification of granular/powdered fuel, the manufacture of combustible gas, and the petroleum industry. It can solve the problems of large heat loss and short service life, and achieve the effect of prolonging the service life.

Active Publication Date: 2015-12-16
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a cold wall lining for an entrained bed gasifier and a device including it in order to overcome the defects of short service life and large heat loss of the cold wall lining in the prior art

Method used

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  • Cold wall liner for entrained bed gasifier and device including same
  • Cold wall liner for entrained bed gasifier and device including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0039]Water-cooled wall-lined entrained-bed gasifier: 1,100 tons of coal per day; adopts a water-cooled wall structure with fins; the water-cooled tube size is Φ38×8mm, and the material is 15CrMoG; the fin width is 10mm, the thickness is 8mm, and the material is 15CrMoR; The slag nails have a diameter of Φ10mm, a length of 16mm, and a center spacing of 20mm. The material is 2520 high-temperature-resistant material, and the cooling medium in the water-cooling tube is 200°C supercooled water.

[0040] Among them, only a 16mm thick erosion-resistant layer is laid on the surface of the water-cooled pipe. The material of the erosion-resistant layer is mainly composed of SiC=60%-75%, Al 2 o 3 =10%~18%, other oxides such as Fe 2 o 3 +SiO2 2 +P 2 o 5 = 7% to 30%; the operating temperature of the gasifier is 1600°C.

[0041] When the gasifier is in normal operation, the above-mentioned water-cooled wall structure with only one layer of erosion-resistant layer applied is adopted. ...

Embodiment approach 2

[0046] Refer to the operation and structural parameters of the water-cooled wall gasifier in Embodiment 1.

[0047] The cold wall lining structure of the present invention is adopted, wherein two layers of heat insulation are used. The two layers of insulation include a layer of insulation as described above and a layer of perlite. For example, 10mm of perlite layer, 10mm of heat insulation layer and 10mm of erosion-resistant coating are sequentially laid out from the water-cooled pipe. Among them, the composition of the erosion-resistant layer and the heat-insulating layer is the same as that of the above-mentioned embodiment 1, and the main composition of the perlite layer is SiO 2 and Al 2 o 3 , and its content is about 85%.

[0048] Under the same operating conditions of the gasifier, the maximum temperature of the fins between the tubes is 252°C, and the proportion of the heat taken away by the cold wall lining to the total calorific value of the coal processed in the...

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Abstract

The invention discloses a cold-wall type lining for an entrained flow bed gasification furnace. The cold-wall type lining comprises a plurality of water cooled tubes and a washout resisting layer, wherein cooling media are introduced into the water cooled tubes; a plurality of anchoring pieces are arranged on the surface of each water cooled tube; and at least one heat insulation layer and the washout resisting layer are successively laid among the anchoring pieces from the surfaces of the water cooled tubes to outside. The invention also discloses the entrained flow bed gasification furnace which comprises the cold-wall type lining as mentioned above. According to the invention, the heat insulation layer is arranged, so that high temperature can be effectively isolated and the water cooled tubes are effectively protected, thereby prolonging the service life of the cold-wall type lining and simultaneously reducing the temperature of fins and lowering the loss of heat taken away by the cold-wall type lining.

Description

technical field [0001] The invention relates to the field of coal gasification, in particular to a cold-wall liner for an entrained bed gasification furnace and an entrained-bed gasifier comprising the cold-wall liner. Background technique [0002] Coal gasification is the use of gasification agent (O 2 、H 2 O or CO 2 ) reacts with coal to produce clean syngas (in the form of CO and H 2 As the main component), it is an important method of coal chemical processing and the key to realize the clean utilization of coal. Coal gasification technology, especially high-pressure, large-capacity entrained-bed gasification technology, has shown good economic and social benefits, represents a development trend, and is the leader and key of clean coal technology, among which the gasifier is the entrained-bed gasification technology One of the most critical devices in the [0003] At present, the world's mainstream entrained bed gasifier lining structures are mainly divided into two ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/74C10J3/48
Inventor 梁钦锋刘海峰郭晓镭龚欣于广锁王辅臣王亦飞许建良李伟锋代正华周志杰郭庆华陈雪莉王兴军刘霞
Owner EAST CHINA UNIV OF SCI & TECH