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Method and equipment for gasifying coal by using plasma

A plasma and coal gasification technology, applied in the field of coal chemical industry, can solve problems such as low gasification rate, low output of target products, and increased greenhouse gas carbon dioxide emissions

Inactive Publication Date: 2010-07-21
周开根
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] my country is rich in coal resources. Large-scale hydrogen production and raw material gas for the production of methanol and dimethyl ether are all obtained through coal gasification. The conventional coal gasification technology uses oxygen / steam gasification method, and the heat required for the gasification reaction comes from the oxidation of charcoal The reaction provides that the gasification rate of this coal gasification method is low, the gasification rate is below 90%, and the hydrogen fraction in the generated syngas is low, only about 30%, so that the yield of the target product is low, such as the conventional coal-to-methanol technology , the production of 1 ton of methanol requires 1.5 tons of high-quality coal, which not only consumes a lot of coal resources, but also increases the emission of greenhouse gas carbon dioxide

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  • Method and equipment for gasifying coal by using plasma
  • Method and equipment for gasifying coal by using plasma
  • Method and equipment for gasifying coal by using plasma

Examples

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Embodiment 1

[0032] Example 1 figure 1In the shown embodiment, the fluidized bed plasma coal gasification system consists of a fluidized bed gasification furnace (1), a fluidization blower (4), a heat exchanger (8), a gas-solid separator (6), a waste heat boiler (10), a soot blower (18) and connecting pipes, wherein: the fluidized bed gasifier (1) has a suspension preheating section (1-IV), a turbulent flow pyrolysis section (1-III), a bubbling Gasification section (1-II) and air chamber (1-I), suspension preheating section (1-IV), turbulent pyrolysis section (1-III), bubbling gasification section (1-II) and air chamber (1 -I) In the same rotary furnace wall, the rotary furnace wall is composed of a refractory furnace wall (120), an insulation layer (121) and a steel shell (122), and in the bubbling gasification section (1-II) There is a cooling layer (115) between the refractory furnace wall (120) and the insulation layer (121). The refractory furnace wall (120) is built with high-alumin...

Embodiment 2

[0035] Example 2 Figure 4 In the shown embodiment, the fixed-bed plasma coal gasification system consists of a fixed-bed gasifier (2), a fluidization blower (4), a heat exchanger (8), a gas-solid separator (6), a waste heat boiler (10 ), a soot blower (18) and connecting pipes, wherein: the fixed bed gasifier (2) has a pyrolysis section (2-II) and a gasification section (2-I), and a pyrolysis section (2-II) In the same rotary furnace wall as the gasification section (2-I), the rotary furnace wall is composed of a refractory furnace wall (218), an insulation layer (219) and a steel shell (220), wherein the gasification section (2- I) There is a cooling layer (215) between the refractory furnace wall (218) and the insulation layer (219), and the pyrolysis section (2-II) and the gasification section (2-I) are in an upper and lower layout and are directly connected. The solution section (2-II) is in the upper section, and the gasification section (2-I) is in the lower section. T...

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Abstract

The invention provides method and equipment for gasifying coal, relating to a coal chemical industry technique and gasification furnace equipment. The invention is characterized in that a fluidized bed gasification furnace is designed into a three-section working mode, the upper section is a suspended preheating section, the middle section is a turbulent flow pyrolyzing section, the lower section is a bubbled gasifying section, a plasma torch is arranged at the bubbled gasifying section, and water vapor is heated to be greater than 4000 DEG C in the plasma torch, is decomposed into active chemicals H., O., H2., HO., O2. and then is directly sprayed to carbon coke of the bubbled gasifying section for chemical reaction to generate synthesis gas of CO and H2 and release heat; and pyrolysis gas, the water vapor and fluidized gas in the furnace are mixed, are discharged out of the furnace through an outlet of the suspended preheating section and then return the bubbled gasifying section of the gasification furnace through a fluidized air pipe and a fluidized fan, and soot, gaseous tar, CmHn and CH4 in the pyrolysis gas react with the water vapor to generate the synthesis gas of the CO and the H2. Compared with the conventional coal gasification technique, the invention reduces the consumption of coal resources and the discharge of greenhouse gases.

Description

technical field [0001] The invention relates to coal chemical technology, in particular to a coal gasification method and gasifier equipment. Background technique [0002] my country is rich in coal resources. Large-scale hydrogen production and raw material gas for the production of methanol and dimethyl ether are all obtained through coal gasification. The conventional coal gasification technology uses oxygen / steam gasification method, and the heat required for the gasification reaction comes from the oxidation of charcoal The reaction provides that the gasification rate of this coal gasification method is low, the gasification rate is below 90%, and the hydrogen fraction in the generated syngas is low, only about 30%, so that the yield of the target product is low, such as the conventional coal-to-methanol technology , the production of 1 ton of methanol requires 1.5 tons of high-quality coal, which not only consumes a lot of coal resources, but also increases the emission ...

Claims

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Application Information

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IPC IPC(8): C10J3/66C10J3/54C10J3/56C10J3/14C10J3/20C10J3/84C10J3/86
Inventor 周开根
Owner 周开根
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