Dust removal and mercury removal integrated device and method

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...

AI Technical Summary

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 is affected, the resistance of the bag area of ​​the electric bag filter is large, and the problem of poor collection performance for fine particles

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