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Dry-process integrating method for purifying smoke and system used therefor

A flue gas and dry process technology, applied in chemical instruments and methods, separation methods, electrostatic effect separation, etc., can solve the problems of increasing power consumption and raw material consumption, poor dust removal efficiency, and high dust specific resistance, reducing power consumption. The effect of consumption, desulfurization, denitration and mercury removal is close to the temperature, and the consumption of raw materials is less

Inactive Publication Date: 2010-07-07
赵英杰
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Two patent applications with patent numbers 02109105.6 and 02109104.8 disclosed the carbon-based flue gas purification process, but the dust removal process used in the flue gas purification process is high-temperature operation, the dust specific resistance is high, the dust removal efficiency is not good, and the dust removal requires pre-treatment. There are two steps of dust removal and coke dust removal. The coke layer undertakes the task of dust removal while purifying the flue gas. Especially when the cross-flow passes through the coke layer, too much dust will occupy the active sites of the active coke, which inhibits the active coke from SO 2 , NO x The removal of harmful impurities such as , Hg, etc. also increases power consumption and raw material consumption, and the adhesion of dust on the surface of the coke layer also increases power consumption; in addition, the use of circulating fluidization technology increases power consumption and raw material consumption ; In the regeneration process, there is also the problem of high energy consumption; the efficiency of flue gas purification is also subject to certain restrictions, which is relatively low

Method used

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  • Dry-process integrating method for purifying smoke and system used therefor
  • Dry-process integrating method for purifying smoke and system used therefor
  • Dry-process integrating method for purifying smoke and system used therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Treatment 1 discharge volume is 20000m 3 / h of acid plant tail gas.

[0044] SO in acid gas 2 The concentration is 20560mg / m 3 , NO x 100mg / m 3 .

[0045] The sour gas first passes through the gas-gas heat exchange device 1 to exchange heat below 100°C, and then enters the low-temperature electrostatic precipitator 2 to remove 99.85% of the dust; The active coke under the bottom is in cross-flow contact, cleaned and emptied, and the deactivated active coke is discharged from the discharge device 5, and sent to the active coke regeneration device 7 through the conveying device 6 for regeneration.

[0046] Considering the high concentration of sulfur-containing gas in the sour gas, the space velocity is selected as 250h -1 , that is, the amount of active coke is 80m 3 . The moving speed of active coke in the cross-flow moving bed adsorption tower is 0.015m / s. The equipment has been in operation for 2 years, and it can meet the effective purification of acid gas, ...

Embodiment 2

[0048] Treatment of flue gas from a steam boiler. The flue gas emission is 8000m 3 / h.

[0049] SO in flue gas 2 The concentration is 2400mg / m 3 , NO x 500mg / m 3 .

[0050] The flue gas first passes through the gas-gas heat exchange device 1 to exchange heat below 100°C, and then enters the low-temperature electrostatic precipitator 2 to remove 99.85% of the dust; the flue gas after dust removal enters the cross-flow moving bed adsorption tower 4 and the top-down The active coke is cross-flow contacted, purified and then emptied, and the deactivated active coke is discharged from the discharge device 5, and sent to the active coke regeneration device 7 through the conveying device 6 for regeneration.

[0051] Considering that the content of harmful gases in the flue gas is low, the air speed is selected to be 800h -1 , that is, the amount of active coke is 10m 3 , the moving speed in the cross-flow moving bed adsorption tower is selected as 0.03m / s. The equipment has ...

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Abstract

The invention relates to a dry-process integrating method for purifying smoke and a system used therefor, and belongs to the field of smoke purification. The method comprises the following steps of: removing dust of the smoke, purifying the smoke through active coke absorption and regeneration inactivated active coke, wherein the step of removing the dust of the smoke adopts a low-temperature electric dust-removing process. The process has the advantages of high purifying efficiency of the smoke and low power consumption and material consumption.

Description

technical field [0001] The invention belongs to the field of flue gas purification, and in particular relates to a dry integrated purification method of flue gas and a used system. Background technique [0002] The flue gas purification process is currently the world's leading SO control technology 2 , NO x The main ways of pollution and prevention and control of acid rain hazards. At present, the main methods of flue gas purification that can realize industrial applications are: calcium method, ammonia method and carbon method. [0003] The most widely used industrially in our country is the calcium method, that is, the limestone-gypsum method for desulfurization. Although this technology is very mature in industrial application, and the desulfurization efficiency can meet environmental protection requirements, the calcium method has high water consumption, high energy consumption and high cost. Wastewater post-treatment, excess emission of CO 2 , by-products cause seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01D53/86B03C3/014
Inventor 赵建勋隋志文程洪义张伟
Owner 赵英杰
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