Multilayer fluidized bed gasification furnace

A fluidized bed gasifier and a multi-layer fluidized bed technology, which is applied in the field of gasifiers, can solve the problems of prolonging the residence time of pulverized coal, uneven heating of the solid phase, and large energy consumption of gasification reaction, and achieves the average length of time. Residence time, high solid-phase processing depth, and the effect of improving carbon conversion

Active Publication Date: 2012-04-04
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this type of coal gasification process are: the gasification reaction consumes a lot of energy, requires high equipment, and requires three reaction devices, and the process is more complicated, etc.
The device prolongs the residence time of pulverized coal, which is beneficial to solid-phase processing and has a high heat energy utilization rate, but the reaction volume util

Method used

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  • Multilayer fluidized bed gasification furnace
  • Multilayer fluidized bed gasification furnace
  • Multilayer fluidized bed gasification furnace

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0100] Example 1:

[0101] See figure 2 , In the structure figure 1 On the basis of this, if the heat generated by the residue gasification alone is difficult to meet the temperature requirements for catalytic gasification, an inlet can be provided on the side wall of the furnace body 3 at the bottom layer C (residue gasification zone) of the multilayer fluidized bed Feed port 5, through which a small amount of raw coal is fed to the residue gasification zone, and the combustion of this small amount of raw coal in the lowermost layer C (residue gasification zone) can provide auxiliary energy to meet the temperature requirements for catalytic gasification.

Example Embodiment

[0102] Example 2:

[0103] See image 3 , In the structure figure 1 In order to meet the needs of ash discharge or process operation conditions, the distribution plate of the lowest layer C of the multilayer fluidized bed can be replaced, and a funnel-shaped distribution plate is used to control the ash discharge gas velocity and flow through the air inlets 6, 7 respectively. Gas speed.

Example Embodiment

[0104] Example 3:

[0105] See Figure 4 , In the structure figure 1 On the basis of, in order to avoid the back-string of gas, realize continuous and stable overflow between the beds, and at the same time facilitate the control of the overflow flow of the material, other forms of overflow devices can be used, such as plug overflow devices with mechanical transmission devices . The position of the plug 8 is adjusted by the mechanical transmission device, the gas direction and the cross-sectional size of the discharge port are changed, and smooth overflow is realized.

[0106] In combination Figure 1-4 In the various embodiments shown and described above, the ratio setting in the figure can be improved (that is, the ratio setting after the improvement is different from that in the Figure 1-4 The ratio shown in), so that the shortest distance between the upper end of the first overflow device and the inner wall of the gasifier shell is between 1 / 5 to 1 / 2 times the inner diameter ...

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Abstract

The invention discloses a multilayer fluidized bed gasification furnace, the fluidized bed gasification furnace comprises a gasification furnace shell, at least two layers of gas distributors, a raw material inlet, a clinker outlet, a gasification agent inlet, a coal gas outlet, a first overflow device and a second overflow device, wherein the gas distributors are perpendicular to a longitudinal axis and arranged at different heights along the longitudinal axis in a perforated plate form to divide the internal space into an upper space, a middle space and a lower space; the clinker outlet and the gasification agent inlet are positioned at the bottom of the shell; the coal gas outlet is positioned on the top of the shell; and the first overflow device and the second overflow device are penetrated into the first gas distributor and the second gas distributor respectively and each of the first overflow device, and the second overflow device is tubular, and has two open ends, so that a raw material flows from the upper space to the middle space through the first overflow device along a curved line and then flows to the lower space from the middle layer through the second overflow device. The shortest distance between the upper end of the first overflow device as well as the second overflow device and the inner wall of the gasification furnace is between 1/5 times and 1/2 times of the internal diameter of the gasification furnace shell.

Description

technical field [0001] In general, the present invention relates to a gasification furnace, and in particular, the present invention relates to a multilayer fluidized bed gasification furnace for preparing methane-rich gas from coal gasification. Background technique [0002] The invention relates to a multilayer fluidized bed gasification furnace device for producing gas rich in methane by gasifying pulverized coal in a multilayer fluidized bed. [0003] my country is a country rich in coal, poor in oil and little in gas. With the rapid development of society and economy, the demand for natural gas in my country has risen sharply, and its proportion in the energy structure has increased rapidly. However, domestic natural gas is still in the early stages of exploration and development, imports are also in the initial stage, and the supply capacity is seriously lagging behind, resulting in increasingly prominent contradictions between natural gas supply and demand. Utilizing...

Claims

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Application Information

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IPC IPC(8): C10J3/56C10J3/66C10J3/72
Inventor 毕继诚崔鑫李金来甘中学
Owner ENN SCI & TECH DEV
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