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Double-coal lock coal crushing, pressurizing and dry ash discharging gasification furnace

A technology of crushed coal pressurization and double coal locking, which is applied in fixed bed gasification, gasification device feeding tools, and the manufacture of combustible gas, etc. The effect of reducing the amount of dust and tar gas, improving gasification capacity, and reducing dust problems

Active Publication Date: 2015-04-01
SEDIN ENG
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the current coal gasification technology develops in the direction of large diameter and high pressure, the amount of coal processed per unit time is gradually increasing. As a coal inlet for pressurized gasification of crushed coal, the coal lock needs to be continuously pressurized and released. To meet the development needs of large-scale coal gasification, in addition, the high pressure increases the coal gasification capacity and the amount of gas produced, coupled with the poor thermal stability of low-rank coal, etc., a single gas outlet will inevitably bring out a large amount of coal dust, resulting in subsequent gas Washing cooling, waste heat recovery and other sections cause blockage or separation difficulties. At the same time, excessive water is used for washing in the washing process, resulting in an increase in the production of gas and water and a decrease in high-grade heat.
[0003] Chinese Patent No. 200580041975.8 discloses a fixed-bed coal gasifier with a single coal lock and a single gas outlet on the static distributor. This gasifier is a commonly used crushed coal pressurized gasifier. It is a serious problem of dust in the crude gas, a lot of low-pressure steam by-products, low water content in the dust-containing tar gas, etc.
[0004] Chinese patent: 201320037548.4 discloses the use of a single coal lock, no static distributor, and a single gas channel, which also has the above problems
The purpose of this patent is to reduce the gas enrichment area, reduce the gas flow rate, and reduce the amount of coal dust carried out. It has a certain effect, but the effect is limited

Method used

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  • Double-coal lock coal crushing, pressurizing and dry ash discharging gasification furnace
  • Double-coal lock coal crushing, pressurizing and dry ash discharging gasification furnace

Examples

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Effect test

Embodiment 1

[0044] Low-rank coal with a water content of 35% is gasified, the gasification pressure is 4.0MPa, and the gasification temperature is 1050°C. The coal sample is crushed and screened to obtain a coal sample with a particle size of 5-50mm, which is loaded into the coal bunker for gasification. The raw material is then gasified through the following steps:

[0045] A new crushed coal pressurized dry ash gasification furnace, which includes a connected double coal lock feeding device 1 and a furnace body. There is a connected double coal lock feeding device 1 on the furnace body. Coal distributor 2, crude gas device 3 in the middle of the gasification chamber in the middle of the furnace body, rotary furnace grate 4 in the lower part of the furnace body, gasification agent inlet 5 and ash discharge port 6 at the bottom of the furnace body, gasification agent inlet 5 is located between the rotary grate 4 and the ash discharge port 6, and the gasification agent inlet 5 is connected...

Embodiment 2

[0054] Anthracite coal with a water content of 6% is used for gasification, the gasification pressure is 5.0MPa, and the gasification temperature is 1250°C. The coal sample is crushed and sieved to obtain a coal sample with a particle size of 5-50mm, which is loaded into the coal bunker to prepare raw materials for gasification. , and then gasify by the following steps:

[0055] Three gas passages 301 are provided in the middle of the gasification furnace to extract 36% of the crude gas. The position of the gas passages 301 on the inner wall 306 of the gasification furnace is measured from the bottom of the gasification chamber, which is 0.41 times the height of the gasification chamber. The included angle β307 is 35 degrees, the opening ratio of the baffle is 34%, the aperture of the small hole 303 is 6.4 mm, the baffle 302 is 1 / 6 circle, and the remaining 64% of the crude gas passes through the dry distillation and drying layer and then passes through the upper part of the ga...

Embodiment 3

[0057] Low-order bituminous coal with 20% water content is used for gasification, the gasification pressure is 5.4MPa, and the gasification temperature is 1150°C. The coal sample is crushed and sieved to obtain a coal sample with a particle size of 5-50mm, which is loaded into the coal bunker for gasification preparation. Good raw material, then gasification by the following steps:

[0058] There are four gas passages 301 in the middle of the gasification chamber to extract 5% of the crude gas. The gas passages 301 in the middle of the gasification chamber are measured from the bottom of the gasification chamber on the inner wall 306 of the gasification chamber. The height of the gasification chamber is 0.45 times. The included angle β307 is 32 degrees, the opening ratio of the baffle is 32%, the aperture of the small hole 303 is 4.4mm, the baffle 302 is 1 / 9 circle, and the remaining 95% of the crude gas passes through the dry distillation and drying layer and then passes thro...

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Abstract

The invention relates to a double-coal lock coal crushing, pressurizing and dry ash discharging gasification furnace. The double-coal lock coal crushing, pressurizing and dry ash discharging gasification furnace comprises a communicated double-coal lock feeding device (1) and a furnace body. The double-coal lock coal crushing, pressurizing and dry ash discharging gasification furnace is characterized in that the communicated double-coal lock feeding device (1) is arranged on the furnace body, a double-channel static coal distributor (2) is arranged at the upper part of the furnace body, a gasification chamber is arranged in the furnace body, a crude coal gas discharging device (3) is arranged at the middle part of the gasification chamber, a rotary furnace grate (4) is arranged at the lower part of the furnace body, a gasifying agent inlet (5) and an ash discharging hole (6) are formed in the bottom of the furnace body, the gasifying agent inlet (5) is arranged between the rotary furnace grate (4) and the ash discharging hole (6), and the gasifying agent inlet (5) is connected with a gas distribution drum (412) in the rotary furnace grate (4). The double-coal lock coal crushing, pressurizing and dry ash discharging gasification furnace has the advantages that little coal dust is carried away and water content of tar-containing coal gas is low.

Description

technical field [0001] The invention belongs to a double-coal-lock crushed coal pressurized dry ash gasification furnace. Background technique [0002] Crushed coal pressurized gasifier is a fixed-bed coal gasifier. Due to the low requirements for raw coal, that is, except for strong cohesive coal, other coal types can be gasified, especially low-rank coal and high ash melting point. low-quality coal. The gasifier is widely used in the field of coal-to-synthetic ammonia, methanol, dimethyl ether, synthetic oil and coal gas. As the current coal gasification technology develops in the direction of large diameter and high pressure, the amount of coal processed per unit time is gradually increasing. As a coal inlet for pressurized gasification of crushed coal, the coal lock needs to be continuously pressurized and released. To meet the development needs of large-scale coal gasification, in addition, the high pressure increases the coal gasification capacity and the amount of g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/20C10J3/74C10J3/82C10J3/30
CPCC10J3/20C10J3/30C10J3/42C10J3/74C10J3/82C10J2200/15
Inventor 王景超解元玉左永飞崔晓曦
Owner SEDIN ENG
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