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Return material riser structure, coal gasification system and method for return material

A feeding pipe and feeding technology, applied in the field of coal gasification, can solve the problems of feeding termination, circulating ash fault (that is, bridging, affecting the normal operation of the gasifier, etc.), and achieve the effect of reducing the ratio and preventing bridging

Active Publication Date: 2022-05-31
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the upward flow of return gas in the return standpipe, when the fine powder content in the return standpipe is high, the circulating ash in the return standpipe will be faulted (that is, bridging), which will lead to return The feed is terminated, affecting the normal operation of the gasifier

Method used

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  • Return material riser structure, coal gasification system and method for return material
  • Return material riser structure, coal gasification system and method for return material
  • Return material riser structure, coal gasification system and method for return material

Examples

Experimental program
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Effect test

Embodiment 1

[0049] refer to Figure 1 to Figure 3 As shown, this embodiment provides a material return pipe structure, including a material return riser 1 and a casing 2 .

[0050] The top end of the return riser 1 has an ash inlet 11 for communicating with the circulating ash outlet 51 of the cyclone 5 , and the bottom end of the return riser 1 has an ash inlet 11 for communicating with the inner cavity of the gasifier 4 . Ash outlet 12. In specific implementation, the return material riser 1 can be placed vertically or slightly inclined, which can be placed according to the actual use environment.

[0051] Specifically, the gasifier 4 has a material inlet 41 , a gasification agent inlet 43 , a crude gas outlet 44 and a slag discharge port 42 . For example, pulverized coal and a catalyst (such as limestone) enter into the inner cavity of the gasifier 4 from the material inlet 41, and a gasification agent (such as oxygen) enters into the inner cavity of the gasifier 4 from the gasificat...

Embodiment 2

[0084] refer to Figure 1 to Figure 3 As shown, this embodiment provides a coal gasification system, which includes a gasifier 4, a cyclone separator 5 and a return pipe structure.

[0085] The material return pipe structure in this embodiment has the same specific structure and realization principle as the material return pipe structure provided in the first embodiment, and can achieve the same or similar technical effects. A description.

Embodiment 3

[0087] This embodiment provides a method for returning materials by using the structure of the return pipe, and the method can be performed by all or part of the structure of the return pipe provided in the first embodiment, so as to prevent the circulating ash from being trapped in the return riser 1 to a certain extent. Bridging occurs.

[0088] refer to Figure 4 As shown, the method specifically includes:

[0089] S101 , conveying the circulating ash discharged from the circulating ash outlet 51 of the cyclone 5 to the returning vertical pipe 1 through the ash inlet 11 at the top of the returning vertical pipe 1 .

[0090] S102, conveying the return gas into the return riser 1, so that part of the circulating ash in the return riser 1 is carried by the return gas into the accommodating space 10 through the through hole 13 on the return riser 1 , so that the filter element 21 in the accommodating space 10 can filter part of the circulating ash. Wherein, the return gas en...

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Abstract

The disclosure relates to a material return pipe structure, a coal gasification system and a material return method. The material return pipe structure includes a material return riser and a sleeve; the top of the return riser has an ash inlet, and the bottom of the return riser There is an ash outlet at the end; the sleeve is set outside the return standpipe, and an accommodation space is formed between the inner wall of the sleeve and the outer wall of the return standpipe; a through hole is opened on the wall of the return standpipe to Part of the circulating ash that enters the return standpipe from the ash inlet is carried by the return gas in the return standpipe, and enters the accommodation space through the through hole; a filter element for filtering the circulation ash is set in the accommodation space ; There is a gas outlet on the casing for the discharge of the return gas that enters the accommodating space, thereby removing part of the fine powder in the return standpipe and reducing the proportion of fine powder in the return standpipe, to a certain extent It prevents the bridging phenomenon of circulating ash in the return riser.

Description

technical field [0001] The present disclosure relates to the technical field of coal gasification, and in particular, to a material returning riser structure, a coal gasification system and a method for returning material. Background technique [0002] Coal gasification technology is an important way to use coal cleanly and efficiently. [0003] Specifically, the coal and the gasification agent undergo gasification reaction in the gasifier to obtain crude gas, and the generated crude gas is discharged through the gas outlet of the gasifier, and then enters the cyclone separator. The cyclone separates the crude gas. Among them, the separated coal gas (carrying fly ash not captured by the cyclone separator) enters the rear system, and the circulating ash captured by the cyclone separator enters the gasifier through the return riser, and returns to the gasifier. The carbon residue in the circulating ash in the gasifier is further reacted in the gasifier, and so on. [0004] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/48C10J3/56C10J3/84C10J3/72
CPCC10J3/48C10J3/56C10J3/84C10J3/72C10J2300/093C10J2300/0986C10J2300/0959
Inventor 徐彬曾亮高占朋李海冰徐刚李克忠
Owner ENN SCI & TECH DEV