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Fluidized bed and molten bed combined gasification apparatus and fluidized bed and molten bed combined gasification method

A fluidized bed gasification and fluidized bed technology, applied in the field of coal gasification, can solve the problems of low effective gas concentration, poor operation stability and reliability of gasifier, low carbon conversion rate and gasification intensity, etc. The effect of high strength, prolonging residence time and improving gasification efficiency

Active Publication Date: 2018-03-06
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems mainly solved by the present invention is the problems of low carbon conversion rate and gasification intensity, low effective gas concentration and poor operation stability and reliability of the gasification furnace in the prior art. The present invention proposes a fluidized bed and Fusion bed combined gasification device, the device is composed of fluidized bed gasification section and molten bed gasification section, the unreacted carbon residue in the fluidized bed gasification section is further reacted in the molten bed gasification section, The material balance is achieved, the carbon conversion rate and effective gas concentration are improved, and the device operates stably and is easy to scale up

Method used

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Embodiment 1

[0036] A gasification reaction device combining a fluidized bed and a molten bed, the inner diameter of the dense phase section of the fluidized bed is 0.2m, the height is 5m, the inner diameter of the dilute phase section is 0.3m, and the height is 6m, the angle between the inclined plane of the gas distributor and the horizontal plane 30°, 10 circles of air holes are set on the conical surface of the gas distributor, and the opening rate is 1.5%. The inner diameter of the throat is 0.1m, the inner diameter of the gasification section of the lower molten bed is 0.8m, and the height is 1.5m. Two gasification agent nozzles are arranged at equal intervals around the periphery. The diameter of the lower slag outlet is 0.3m, and the position of the return material inlet is located at 1 / 4 of the height of the fluidized bed gasification section, that is, the dense phase section of the fluidized bed gasification section.

[0037] In the experiment, Inner Mongolian lignite was added f...

Embodiment 2

[0039] A gasification reaction device combining a fluidized bed and a molten bed, the inner diameter of the dense phase section of the fluidized bed is 0.2m, the height is 5m, the inner diameter of the dilute phase section is 0.3m, and the height is 6m, the angle between the inclined plane of the gas distributor and the horizontal plane 30°, 10 circles of air holes are set on the conical surface of the gas distributor, and the opening rate is 1.5%. The inner diameter of the throat is 0.1m, the inner diameter of the gasification section of the lower molten bed is 0.8m, and the height is 1.5m. Two gasification agent nozzles are arranged at equal intervals around the periphery. The diameter of the lower slag outlet is 0.3m, and the position of the return material inlet is located at 1 / 4 of the height of the fluidized bed gasification section, that is, the dense phase section of the fluidized bed gasification section.

[0040] In the experiment, Inner Mongolian lignite was added f...

Embodiment 3

[0042] A gasification reaction device combining a fluidized bed and a molten bed, the inner diameter of the dense phase section of the fluidized bed is 0.2m, the height is 5m, the inner diameter of the dilute phase section is 0.3m, and the height is 6m, the angle between the inclined plane of the gas distributor and the horizontal plane 30°, 10 circles of air holes are set on the conical surface of the gas distributor, and the opening rate is 1.5%. The inner diameter of the throat is 0.1m, the inner diameter of the gasification section of the lower molten bed is 0.8m, and the height is 1.5m. Two gasification agent nozzles are arranged at equal intervals around the periphery. The diameter of the lower slag outlet is 0.3m, and the position of the return material inlet is located at 1 / 2 of the height of the fluidized bed gasification section, that is, the dilute phase section of the fluidized bed gasification section.

[0043] In the experiment, Inner Mongolian lignite was select...

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Abstract

The invention relates to a fluidized bed and molten bed combined gasification apparatus and a fluidized bed and molten bed combined gasification method. A purpose of the present invention is to solvethe problems of low carbon conversion rate, low gasification intensity, low effective gas concentration, and poor operation stability and poor reliability of the gasification furnace in the prior art.The technical scheme of the present invention comprises that the fluidized bed and molten bed combined gasification apparatus comprises a fluidized bed gasification section on the upper portion and amolten bed gasification section on the lower portion, the two gasification sections are connected by using a throat, the lower portion of the fluidized bed gasification section is provided with a rawmaterial inlet and a return material inlet, and the side surface of the molten bed gasification section is provided with gasification agent spraying nozzles. The fluidized bed and molten bed combinedgasification method mainly comprises that a carbon-containing raw material and a gasification agent are subjected to a gasification reaction in the fluidized bed gasification section, the incompletely-reacted flying ash is collected by a cyclone separator and a return material device, and is cyclically introduced into the fluidized bed gasification section, and the generated coarse residue is further combusted in the molten bed gasification section. With the technical scheme of the present invention, the problem in the prior art is well solved. The apparatus and the method of the present invention can be used in the coal gasification field.

Description

technical field [0001] The invention relates to a coal gasification device and method, more specifically, the invention designs a gasification device and method combining a fluidized bed and a molten bed, and belongs to the field of coal gasification. Background technique [0002] my country has abundant coal resources. With the development of our country's economy, the demand for coal is also increasing day by day. In my country's coal consumption structure, power generation and heating industries account for about 50%. However, a large amount of dust, sulfur dioxide, nitrogen oxides and other harmful substances emitted by coal combustion seriously affect human health and the natural environment. As an important way of clean and efficient utilization of coal, coal gasification technology has been widely used in metallurgy, chemical industry, building materials, machinery and other industrial industries and industrial gas. Existing coal gasification technologies mainly incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/56C10J3/72C10J3/76C10J3/84
CPCC10J3/56C10J3/72C10J3/76C10J3/84C10J2200/152C10J2300/1628C10J2300/1807
Inventor 金渭龙顾松园钟思青屠功毅
Owner CHINA PETROLEUM & CHEM CORP
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