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PM during wet desulfurization 2.5 Removal method and device thereof

A wet desulfurization and removal technology, applied in combination devices, separation methods, chemical instruments and methods, etc., can solve the problem of ineffective removal of coal-fired ultrafine particles, increase the power consumption of induced draft fans, and increase flue resistance, etc. problems, to achieve the effect of increasing the length and resistance of the flue, saving equipment investment and construction costs, and simple control

Active Publication Date: 2017-03-01
WUHUAN ENG
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Problems solved by technology

Therefore, the current common wet flue gas desulfurization projects in coal-fired power 2.5 The treatment effect is often poor
[0004] At present, the flue gas PM is controlled in the desulfurization process 2.5 There are mainly two ways to discharge: 1. Use steam phase change fine particles to condense and grow, such as "a method and device for removing fine particles in wet flue gas desulfurization", which consumes a certain amount of steam, and at the same time the steam phase change 2. Reduce the generation of ammonium sulfate particles by reducing the inlet flue gas temperature, such as "an effective method to reduce the generation of ammonium sulfate particles in ammonia desulfurization" , this method has a certain effect on reducing the generation of ammonium sulfate particles, but has no obvious effect on the removal of coal-fired ultrafine particles

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  • PM during wet desulfurization <sub>2.5</sub> Removal method and device thereof
  • PM during wet desulfurization <sub>2.5</sub> Removal method and device thereof
  • PM during wet desulfurization <sub>2.5</sub> Removal method and device thereof

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing, device of the present invention is further explained:

[0027] PM during wet desulfurization 2.5 The removal device includes a desulfurization absorption tower 7, the top of the desulfurization absorption tower is provided with a net flue gas outlet 11, and the upper section is provided with at least one layer of mist eliminator 112, and each layer of mist eliminator 112 is equipped with a mist eliminator Cleaning device 113; the middle section of the desulfurization absorption tower is provided with a raw flue gas inlet 12, and a desulfurization liquid spray layer 115 is arranged above the original flue gas inlet 12, and a flocculant atomization spray layer is arranged above the desulfurization liquid spray layer 115 114, the flocculant atomized spray layer 114 has a flocculant inlet and a factory air inlet 13; a floc filter 116 is provided below the liquid level in the lower section of the desulfurization absorption towe...

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Abstract

The invention discloses a method and device for removing PM2.5 in the process of wet desulfurization, which solves the problems of difficulty in removing PM2.5 and complicated process in the existing wet desulfurization process. The boiler flue gas enters the desulfurization absorption tower, and desulfurizes in reverse contact with the desulfurization liquid sprayed from the desulfurization liquid spray layer in the middle section of the desulfurization absorption tower and the flocculant liquid sprayed from the flocculant atomization spray layer to desulfurize and make the PM2 in the flue gas .5 Removal after flocculation. The invention has the advantages of simple process, good PM2.5 removal effect, energy saving and consumption reduction, and low production cost and equipment investment cost.

Description

technical field [0001] The invention belongs to the technical field of fine particulate matter control in flue gas, in particular to a PM desulfurization process in wet desulfurization 2.5 Methods and devices for removal. Background technique [0002] At present, the backward trend of the overall deterioration of my country's environmental conditions has not been fundamentally curbed, environmental contradictions have become increasingly prominent, and the pressure on environmental protection has continued to increase. Atmospheric smog is prominent in some regions and cities. According to research data in 2005, PM directly emitted by coal-fired power plants 2.5 About the national PM 2.5 About 10% of the emissions, plus the secondary particulate matter produced by coal combustion, coal-fired power plants emit PM 2.5 accounted for national PM 2.5 The proportion will be even higher. [0003] In the traditional wet flue gas desulfurization (WFGD) process, on the one hand, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D50/00B01D53/78B01D53/50
Inventor 杨艳李文刚张军营
Owner WUHUAN ENG
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