Entrained-flow bed and method for recycling sulfur by reducing SO2 in desulfurization pyrolysis gas by using carbon-based material

A carbon-based material and entrained bed technology, applied in chemical instruments and methods, sulfur preparation/purification, sulfur compounds, etc., to achieve the effect of improving SO2 conversion efficiency and sulfur yield, rich surface functional groups, and developed pore structure

Active Publication Date: 2018-06-22
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be said that the SO produced by burning coal is converted into sulfur 2 Recycling is the best choice for sulfur resource utilization in coal-fired power plants, but currently there is no way to recover SO 2 Mature process for efficient recovery of sulfur

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  • Entrained-flow bed and method for recycling sulfur by reducing SO2 in desulfurization pyrolysis gas by using carbon-based material

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[0047] It should be pointed out that the following detailed descriptions are all illustrative and are intended to provide further explanations for the application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0048] It should be noted that the terms used here are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate There are features, steps, operations, devices, components, and / or combinations thereof.

[0049] Such as figure 1 As shown, a carbon-based material is used ...

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Abstract

The invention discloses an entrained-flow bed and a method for recycling sulfur by reducing SO2 in desulfurization pyrolysis gas by using a carbon-based material. The method comprises the following steps: enabling sulfur dioxide-containing gas to enter the entrained-flow bed from a gas inlet below a venturi tube in the entrained-flow bed, accelerating the sulfur dioxide-containing gas by the venturi tube, and then enabling sulfur dioxide-containing gas to carry the carbon-based material conveyed by a powder conveying machine to form a gas-flow fluidized state; under a high-temperature condition, reducing the sulfur dioxide into the sulfur under the catalytic reduction of active coke; enabling produced gaseous sulfur to flow into a separator under the driving of a gas flow to remove solid impurities, and then enabling the gaseous sulfur to enter a reheater for initially cooling and then enter a condenser for cooling again, wherein the sulfur is condensed into liquid sulfur which is collected by a liquid sulfur collecting device, cooled gas enters a catalytic reduction device to reduce a sulfur-containing substance in the gas into sulfur, and produced waste gas is heated by the reheater and is then inflated into the entrained-flow bed for providing energy for a reduction reaction in the entrained-flow bed.

Description

Technical field [0001] The invention specifically relates to a method of reducing SO in desulfurization gas with carbon-based materials 2 Entrained bed and method for recovering sulfur. Background technique [0002] Coal is currently the main fossil energy source in my country. Coal contains a large amount of sulfur resources, and sulfur is an important resource in daily life and industrial production. Use SO during coal combustion 2 Form release. Currently, limestone wet desulfurization technology is widely used, and its desulfurization by-product is desulfurized gypsum. However, limestone mining causes serious environmental damage, and at the same time, the utilization rate of desulfurized gypsum is low, and a large amount of solid waste is dumped, causing secondary pollution. Activated coke dry desulfurization technology is a recyclable desulfurization technology. The saturated activated coke can be regenerated by heating or washing with water. SO 2 With sulfuric acid or li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/04
CPCC01B17/0482
Inventor 马春元赵希强宋占龙王涛周萍冯太李军
Owner SHANDONG UNIV
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