Dust removal and mercury removal integrated device and method

A mercury-removal, integrated technology, applied in the field of flue gas purification, can solve the problems of high operating cost, influence of fly ash quality, large resistance in the bag area of ​​the electrostatic bag filter, etc., to improve the capture rate, prolong the working life, The effect of reducing pocket resistance and injection pressure

Inactive Publication Date: 2014-01-08
XIAN UNIV OF TECH
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  • Claims
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Problems solved by technology

It solves the problems in the prior art that the operating cost of mercury removal from coal-fired boiler flue gas is high, the quality of fly ash

Method used

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  • Dust removal and mercury removal integrated device and method

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] The invention provides an integrated dust removal and mercury removal device, such as figure 1 As shown, it includes a housing 1 with a dust removal chamber in the inner cavity, and a pipe 9 extending into the housing 1 is provided above the housing 1; along the direction of travel of the flue gas flow, the dust removal chamber is sequentially provided with an electric zone and a bag zone. 4. The dust collection electric field 2 and the integrated coagulation electric field 3 are arranged in sequence in the electric area. The dust collection electric field 2 is composed of several rows of identical dust collection channels, each channel is composed of two parallel ground electrode rows and a negative high voltage cathode row placed in the middle, the ground electrode row is Several Z-shaped or C-shaped anode plates are connected, the ...

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Abstract

The invention discloses a dust removal and mercury removal integrated device and method. The method comprises the steps: efficiently collecting coarser granular dust in coal-fired boiler smoke through a dust collection electric field to be entered into an electrical charge integrated coagulation electric field for dust coagulation and thickening; spraying activated carbon behind the integrated coagulation electric field to adsorb and remove mercury; and collecting the thickened dust and mercury removed activated carbon after the thickened dust and mercury removed activated carbon simultaneously enter a bag region. The original-quality coal ash is discharged from an ash hopper in an electric region and is comprehensively utilized by downstream users; mercury removed activated carbon and a small deal of coal ash are discharged from an ash hopper in the bag region, wherein a small deal of mercury removed activated carbon and coal ash are discharged to the outside, and most of the mercury removed activated carbon and coal ash are circulated to a pipeline and are injected with smoke again so as to be recycled, and therefore, the consumption of the activated carbon is greatly reduced, and the quality of the coal ash is ensured. Due to a coagulation effect, the discharging concentration of the dust can be remarkably reduced, and the stability and economy of a system can be improved.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and in particular relates to an integrated device for dust removal and mercury removal, and also relates to an integrated method for dust removal and mercury removal. Background technique [0002] At present, my country has become one of the areas with the most serious pollution of fine particulate matter in the world, severe haze weather occurs frequently, PM 2.5 It has become a hot term in the society, and the control of fine particle pollution is unprecedented. "Ambient Air Quality Standards" GB3095-2012 added PM 2.5 The emission standards of air pollutants in major polluting fields such as thermal power and metallurgy have been comprehensively revised, and various provinces and cities have also vigorously carried out various particulate matter emission control work. [0003] The high-efficiency dust removal equipment in the industrial field is mainly divided into two types: ele...

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Application Information

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IPC IPC(8): B01D50/00B01D53/10
Inventor 何剑徐国胜徐立波
Owner XIAN UNIV OF TECH
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