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A method and device for further purifying wet desulfurization clean flue gas

A wet desulfurization and flue gas purification technology, applied in chemical instruments and methods, separation methods, use of liquid separation agents, etc., can solve problems such as haze formation, achieve improved emission standards, significant energy saving and environmental protection effects, and simple installation. Effect

Active Publication Date: 2016-01-20
BEIJING ZHONGNENG NUOTAI ENERGY SAVING & ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention improves the desulfurization efficiency and the quality of by-products through the installation of multi-stage absorption towers, but the above-mentioned empty tower spraying problem still exists in the installation of absorption towers at all levels, and there is still the possibility of smog formation

Method used

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  • A method and device for further purifying wet desulfurization clean flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for further purifying wet desulfurization net flue gas of the present invention comprises the following steps on the basis of the existing wet desulfurization process:

[0029] (1) The clean flue gas enters the water membrane and then purified;

[0030] (2) collecting the re-purification solution produced in step (1);

[0031] (3) Recycle the repurified liquid collected in step (2).

[0032] In the above embodiments, the existing wet desulfurization process includes limestone-gypsum method, ammonia method, double alkali method, magnesium method and so on.

[0033] Such as figure 1 As shown, the method for further purifying wet desulfurization net flue gas by applying the present invention can be realized by the following device, specifically a device for further purifying wet desulfurization net flue gas of the present invention, including for realizing the existing The wet desulfurization device of the wet desulfurization process, the wet desulfurization de...

Embodiment 2

[0037] The basic steps of a method for further purifying wet desulfurization net flue gas of the present invention are the same as in Example 1, specifically:

[0038] In the step (1), the clean flue gas is re-purified through the water film in the water film packing layer 6, and the purified clean flue gas goes up through the water film packing spray layer 7 and is discharged. The film filler spray layer 7 sprays the purifier to the water film filler layer 6, and the purifier enters the water film filler spray layer 7 through the water film spray circulation pipeline 19 and the water film spray circulation pump 18 from the liquid collection tank, The cleaning agent in the liquid collection tank is transported through the cleaning agent supply device;

[0039] In the step (2), the repurification liquid generated in the step (1) is collected through the liquid collector 5;

[0040] In the step (3), the repurification liquid collected in the step (2) is recovered and processed ...

Embodiment 3

[0050] The basic steps of a method for further purifying wet desulfurization net flue gas of the present invention are the same as in Embodiment 2, specifically:

[0051] In order to fully save water and other reagents, and to achieve full recycling, the number of the liquid collection tanks is two, and the two liquid collection tanks are respectively the primary liquid collection tank 11 and the secondary liquid collection tank 17;

[0052]In the step (1), the purifying agent supply device delivers the purifying agent to the primary collecting tank 11, and the purifying agent in the upper layer of the primary collecting tank 11 flows into the secondary collecting tank 17 through the overflow pipe 15 Among them, the middle part of the secondary liquid collection tank 17 is provided with a water film spray circulation pipe interface, and the purifying agent enters the water film filler spray layer 7 through the water film spray circulation pipe 19 and the water film spray circul...

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Abstract

The invention relates to a method and a device for further purifying wet desulfurization purified flue gas. The method and the device are used for repurifying the purified flue gas by virtue of a water film and collecting and recycling repurifying liquid. The device comprises a wet desulfurization device, a water film filler layer and a liquid collector, wherein the wet desulfurization device comprises an absorption tower and a purified flue gas duct used for discharging the purified flue gas, the absorption tower is connected with the purified flue gas duct and is internally provided with an absorbent spraying layer, the water film filler layer is arranged above the absorbent spraying layer, and the liquid collector is arranged between the water film filler layer and the absorbent spraying layer. With the adoption of the method and the device, the purified flue gas is fully repurified, residual substances such as sulfur dioxide, sulfur trioxide, hydrogen chloride, hydrogen fluoride, dusts, materials entrained by gas and liquid, escaped ammonia and aerosol which forms PM2.5 in the purified flue gas are effectively removed, the problem of residual pollutants in existing wet desulfurization purified flue gas is efficiently solved, the running cost is low, the energy-saving and environment-friendly effect is remarkable, and the method and the device are suitable for being popularized and applied in the field of retreatment of the wet desulfurization purified flue gas.

Description

technical field [0001] The present invention relates to the technical field of flue gas purification treatment, in particular to a method and device for further purifying wet desulfurization net flue gas, and treating unremoved sulfur dioxide, sulfur trioxide, hydrogen chloride, Method and device for pollutants such as hydrogen fluoride, dust, aerosol and gas-liquid entrainment. Background technique [0002] At present, the purification treatment of coal-fired boiler flue gas and other industrial tail gas pollutants mainly adopts wet desulfurization technology, such as limestone-gypsum method, ammonia method, double alkali method, magnesium method, etc. In the existing field of wet flue gas purification, empty tower spraying is mostly used in the wet desulfurization process, but in the empty tower spraying treatment, due to the influence of factors such as spray layer structure and spraying method, flue gas drift, Flue gas wall escape, short gas-liquid contact time and othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50B01D53/68B01D47/00
Inventor 王玥
Owner BEIJING ZHONGNENG NUOTAI ENERGY SAVING & ENVIRONMENTAL PROTECTION CO LTD
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