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Fluidized bed gasification process

A technology for fluidized bed gasification and fluidized bed gasification furnace, which is applied in the field of gasification and can solve the problems of high carbon content and low effective composition of coal gas.

Inactive Publication Date: 2015-01-07
SHANXI HENGTAI HEAVY MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem of high carbon content and low active ingredients in the output gas of the fluidized bed gasification process in the prior art, and further provides a Fluidized bed gasification process with low carbon content and high effective components in coal gas

Method used

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  • Fluidized bed gasification process

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Effect test

Embodiment 1

[0028] A kind of fluidized bed gasification process of the present invention, comprises the steps:

[0029] (1) take lignite as raw material, first crushing and screening are carried out to lignite, and the pulverized coal that obtains particle diameter is 3-4mm is stand-by;

[0030] (2) Carry out second crushing and screening to lignite to obtain pulverized coal with a particle diameter of 7-8mm for use;

[0031] (3) get the pulverized coal 12.5kg that obtains in step (1), get the pulverized coal 50kg in the step (2), in above-mentioned pulverized coal, spray active agent respectively, described active agent is the H that concentration is 50wt%. 3 BO 3 Aqueous solution (containing H 3 BO 3 1kg) and 60wt% aqueous solution (containing MgCl 2 1.083kg) of the mixture;

[0032] (4) drying the pulverized coal after spraying the active agent at 50 degrees Celsius for 1 hour;

[0033] (5) Choose oxygen as the gasification agent to carry out oven treatment on the fluidized bed g...

Embodiment 2

[0037] A kind of fluidized bed gasification process of the present invention, comprises the steps:

[0038] (1) take lignite as raw material, first crushing and screening are carried out to lignite, and the pulverized coal that obtains particle diameter is 3-4mm is stand-by;

[0039] (2) Carry out second crushing and screening to lignite to obtain pulverized coal with a particle diameter of 7-8mm for use;

[0040] (3) get the pulverized coal 25kg that obtains in step (1), get the pulverized coal 50kg in the step (2), in above-mentioned pulverized coal, spray active agent respectively, described active agent is the H that concentration is 50wt%. 3 BO 3 Aqueous solution (containing H 3 BO 3 2kg) and 60wt% CaCl 2 Aqueous solution (contains CaCl 2 3kg) of the mixture;

[0041] (4) Dry the pulverized coal after spraying the active agent at 60 degrees Celsius for 2.5 hours;

[0042] (5) Choose water vapor as the gasification agent to carry out oven treatment on the fluidized ...

Embodiment 3

[0046] A kind of fluidized bed gasification process of the present invention, comprises the steps:

[0047] (1) take lignite as raw material, first crushing and screening are carried out to lignite, and the pulverized coal that obtains particle diameter is 3-4mm is stand-by;

[0048](2) Carry out second crushing and screening to lignite to obtain pulverized coal with a particle diameter of 7-8mm for use;

[0049] (3) get the pulverized coal 30kg that obtains in step (1), get the pulverized coal 50kg in the step (2), in above-mentioned pulverized coal, spray active agent respectively, described active agent is the H that concentration is 60wt%. 3 BO 3 Aqueous solution (containing H 3 BO 3 1kg) and 50wt% of MgCl 2 Aqueous solution (containing MgCl 2 1.67kg) of the mixture;

[0050] (4) Dry the pulverized coal after spraying the active agent at 60 degrees Celsius for 2.5 hours;

[0051] (5) Select the mixture of oxygen and water vapor as the gasification agent to carry out...

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Abstract

The invention relates to a fluidized bed gasification process. The fluidized bed gasification process comprises the following steps: firstly needing to crush raw coal to obtain powdered coal with different size distributions, wherein one grain size of the powdered coal is 3-4 mm, and the other grain size of the powdered coal is 7-8 mm; subsequently carrying out the treatment of an active agent on the powdered coal; subsequently carrying out fluidized bed gasification treatment after the powdered coal is mixed. According to the process disclosed by the invention, the usage level of raw materials can be greatly improved, the performance of the raw materials is activated, and the process plays important roles in guaranteeing the usage rate, namely conversion rate, of the raw coal and reducing the content of carry-over carbon in coal gas; moreover, S element is not detected out in raw gas obtained through the fluidized bed gasification process disclosed by the invention, and the cost of subsequent desulfurization is reduced.

Description

technical field [0001] The invention relates to a fluidized bed gasification process, belonging to the technical field of gasification. Background technique [0002] A fluidized bed is a bed in which particles are suspended using air force. Specifically, it means that when the velocity of the fluid passing through the bed gradually increases to a certain value, the particles begin to loosen, and the distance between the particles increases, which leads to the expansion of the bed volume. After the fluid velocity is further increased, the bed layer will not be able to maintain a fixed bed state. At this time, all the particles are suspended in the fluid and move. With the further increase of the fluid velocity, the movement state of the particles becomes more active, and the expansion degree of the bed layer also increases. However, the fluidized bed has strict requirements on the fluid velocity while increasing the fluid velocity, that is, the fluid velocity must be guarant...

Claims

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Application Information

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IPC IPC(8): C10J3/54
CPCC10J3/466C10J3/84C10J2300/0906C10J2300/0909C10J2300/093
Inventor 李燕强
Owner SHANXI HENGTAI HEAVY MACHINERY
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