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Method and device for using plasma to proceed coal gasification

A plasma and coal gasification technology, which is applied in the gasification of granular/powdered fuels, the manufacture of combustible gases, and the petroleum industry, can solve the problems of troublesome application of syngas, high content, and low calorific value, and achieve economic benefits and social considerable benefits

Inactive Publication Date: 2004-03-03
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the conventional coal gasification method, the heat required for gasification is generated by coal combustion. In the combustion process, the oxidant is generally excessive, and the result is that the oxygen content and CO in the product gas 2 High content (a CO 2 Generally greater than 10%), this will bring some troubles to the application of synthesis gas and increase the cost of gas treatment; on the other hand, the requirements for coal types are very strict. Difficult to synthesize high-quality syngas

Method used

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  • Method and device for using plasma to proceed coal gasification
  • Method and device for using plasma to proceed coal gasification
  • Method and device for using plasma to proceed coal gasification

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Experimental program
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Effect test

Embodiment approach 1

[0030] In the plasma generator, air is introduced, and at the same time, the cooling inlet and outlet valves of the plasma generator are opened, the high-frequency ignition device is activated, and the power knob of the generator is adjusted to generate a plasma jet. When the required power is adjusted, pulverized coal and oxidant (air) are supplied according to the metering at an angle of 30 degrees to the axial direction of the gasification reactor, and the gasification reactor is heated to above 1700k°C. The flow of pulverized coal, superheated steam and oxidant used in gasification enters the gasifier from the tangential direction, the ratio of gasification pulverized coal to water vapor is 1:1, and the ratio of pulverized coal to oxidant and the output power of the plasma generator are adjusted. , keeping the system temperature at 1300k, the resulting gas composition (vol) CO 21.1% and H 2 20.5%, CO 2 The content is less than 5%.

Embodiment approach 2

[0032] In the plasma generator, air is introduced, and at the same time, the cooling inlet and outlet valves of the plasma generator are opened, the high-frequency ignition device is activated, and the power knob of the generator is adjusted to generate a plasma jet. When the required power is adjusted, pulverized coal and oxidant (air) are supplied according to the metering at an angle of 30 degrees to the axial direction of the gasification reactor, and the gasification reactor is heated to above 1750k°C. The flow of pulverized coal, superheated steam and oxidant used in gasification enters the gasifier from the tangential direction. The ratio of pulverized coal to steam is 1:1.2, and the ratio of pulverized coal to oxidant and the output power of the plasma generator are adjusted. , keeping the system temperature at 100k, the resulting gas composition (vol) CO 22.1% and H 2 21.5%, CO 2 The content is less than 4%.

Embodiment approach 3

[0034] In the plasma generator, air is introduced, and at the same time, the cooling inlet and outlet valves of the plasma generator are opened, the high-frequency ignition device is activated, and the power knob of the generator is adjusted to generate a plasma jet. When the required power is adjusted, pulverized coal and oxidant (air) are supplied according to the metering at an angle of 30 degrees to the axial direction of the gasification reactor, and the gasification reactor is heated to above 1800k°C. The flow of pulverized coal, superheated steam and oxidant used in gasification enters the gasifier from the tangential direction. The ratio of pulverized coal to water vapor is 1:1.1, and the ratio of pulverized coal to oxidant and the output power of the plasma generator are adjusted. , keeping the system temperature at 1500k, the resulting gas composition (vol) CO 20.1% and H 2 22.5%, CO 2 The content is less than 3%.

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Abstract

A process for gasifying coal by plasma includes such steps as reaction of plasma jet on powdered coal and part of oxidant to make coal burn partially and remove volatile component, and reaction of hot carbon particles on the mixture of powdered coal, gasifier and oxidant to generate CO and H2. Its gasifying apparatus has an arc plasma generator and gasifying reactor with two powdered coal inlet pipes and at least two other materials inlet pipes.

Description

technical field [0001] The invention relates to a method and a device for coal gasification by plasma, belonging to the field of coal chemical industry, in particular, to a method and device for coal gasification assisted by a plasma torch. In other words, it is a method and device for preparing synthesis gas. technical background [0002] In the conventional coal gasification method, the heat required for gasification is generated by the combustion of coal. During the combustion process, the oxidant is generally excessive, resulting in the oxygen content and CO in the product gas. 2 High content (-CO 2 Generally greater than 10%), which brings certain troubles to the application of syngas, resulting in an increase in gas treatment costs; on the other hand, the requirements for coal types are very strict. It is difficult to synthesize high quality syngas. SUMMARY OF THE INVENTION [0003] The purpose of the method and device for coal gasification by plasma of the presen...

Claims

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Application Information

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IPC IPC(8): C10J3/18C10J3/46
CPCY02E20/18
Inventor 谢克昌鲍卫仁朱素渝曹青申曙光
Owner TAIYUAN UNIV OF TECH
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