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Dust-removal mercury-removal filter bag for bag-type dust remover and preparation method of filter bag

A bag filter and mercury removal technology, applied in chemical instruments and methods, separation methods, dispersed particle filtration, etc., can solve the problems of affecting the quality of fly ash, affecting working performance, low adsorption capacity, etc., to meet the requirements of flue gas mercury removal. Requirement, low investment and operating costs, and simple preparation process

Inactive Publication Date: 2013-05-22
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods consume a lot of money and cost a lot, and a series of new problems will arise, including: the method of spraying adsorbents into the flue gas to remove mercury, adsorbing mercury-containing adsorbents and fly ash by the dust collector at the same time Capture, the doping of adsorbents in fly ash will affect the quality of fly ash; in addition, the injection of adsorbents may also affect the working performance of ESP and FF; the stability of adsorbents containing mercury is also very important, adsorption Although the agent injection method combined with ESP and FF dust removal equipment can effectively control the mercury in the flue gas, this method is mainly based on physical adsorption, and the mercury in the adsorbent may be released into the atmosphere again, causing secondary pollution. Pollution
Physical adsorption has the characteristics of low adsorption capacity, poor activity, high price, and poor regeneration. Therefore, it is an urgent problem to replace the role of adsorption in mercury removal by catalytic oxidation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of Mn(5)-CoO(1)-PSA filter bag: the active component MnO 2 After the precursor manganese nitrate of manganese nitrate is stirred and dissolved in water, the precursor cobalt nitrate of the active component CoO is added, and the mixture is evenly stirred to obtain a mixed solution. In the composite solution, MnO 2 The mass ratio to CoO was 5:1, and the filter bag made of polysulfonamide fiber (PSA) was immersed in the mixed solution for multiple impregnations of equal volume, and left to stand for 24 hours; the solution was evaporated to dryness at 60°C to 100°C, Place in a clean drying oven at 100°C until completely dry; place the filter bag in a muffle furnace, decompose cobalt nitrate and manganese nitrate for 4 hours at 250°C. After the decomposition is completed, stop the heating of the muffle furnace, let it drop to normal temperature naturally, and make a dust removal and mercury removal filter bag, in which MnO 2 The loading of CoO is 5 wt%, the load...

Embodiment 2

[0026] Preparation of Mn(5)-CoO(3)-PSA filter bag: the active component MnO 2 After the precursor manganese nitrate of manganese nitrate is stirred and dissolved in water, the precursor cobalt nitrate of the active component CoO is added, and the mixture is evenly stirred to obtain a mixed solution. In the composite solution, MnO 2 The mass ratio to CoO was 5:3, and the filter bag made of sulfonamide fiber (PSA) was immersed in the mixed solution for multiple impregnations of equal volume, and stood for 24 hours; at 60 o Evaporate the solution at C ~ 100 ℃, put it in a clean drying oven at 100 ℃ until completely dry; put the filter bag in a muffle furnace, decompose cobalt nitrate and manganese nitrate at 250 ℃ for 4 hours. After the decomposition is completed, stop the heating of the muffle furnace, let it drop to normal temperature naturally, and make a dust removal and mercury removal filter bag, in which MnO 2 The loading of CoO is 5 wt%, the loading of CoO is 3 wt%, and ...

Embodiment 3

[0028] Preparation of Mn(5)-CoO(5)-PSA filter bag: the active component MnO 2 After the precursor manganese nitrate of manganese nitrate is stirred and dissolved in water, the precursor cobalt nitrate of the active component CoO is added, and the mixture is evenly stirred to obtain a mixed solution. In the composite solution, MnO 2 The mass ratio to CoO was 5:5, and the filter bag made of polysulfonamide fiber (PSA) was immersed in the mixed solution for multiple impregnations of equal volume, and left to stand for 24 hours; the solution was evaporated to dryness at 60°C-100°C, Place in a clean drying oven at 100°C until completely dry; place the filter bag in a muffle furnace, decompose cobalt nitrate and manganese nitrate for 4 hours at 250°C. After the decomposition is completed, stop the heating of the muffle furnace, let it drop to normal temperature naturally, and make a dust removal and mercury removal filter bag, in which MnO 2 The loading of CoO is 5wt%, the loading ...

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Abstract

The invention discloses a dust-removal mercury-removal filter bag for a bag-type dust remover. The dust-removal mercury-removal filter bag is bag which is loaded with a mercury-removal catalyst and made of high-temperature filtration fiber; and the mercury-removal catalyst is a mixture of manganese oxide and cobalt oxide. The invention further discloses a preparation method of the dust-removal mercury-removal filter bag; the filter bag is loaded with the mercury-removal catalyst and applied to the bag-type dust collector; the catalyst can be used for oxidizing elemental mercury in coal-fired flue gas into bivalent mercury (Hg2+), so that absorption or adsorption of a flue gas pollutant purifying device is facilitated. The dust-removal mercury-removal filter bag is applied to controlling mercury emission of a coal-fired power plant, so that adsorbent is substituted by catalytic oxidation; on the basis of keeping the smoke dust removal effect, the removal efficiency of the elemental mercury is bigger than 30%, so that the flue gas mercy removal effect of the coal-fired power plant can be satisfied.

Description

technical field [0001] The invention relates to a filter bag of a bag filter, in particular to a filter bag for dust removal and mercury removal for the bag filter, and also relates to a preparation method of the filter bag. Background technique [0002] In recent years, with the increasingly serious problem of coal burning pollution, the enhancement of people's awareness of environmental protection, the formulation and implementation of relevant environmental protection laws and regulations, especially the development of trace element testing technology, the problem of mercury pollution caused by coal burning has become more and more serious. valued. There are a few developed countries in the world that have established emission standards for certain trace elements in coal. With the improvement of people's environmental awareness and understanding, this limitation will inevitably become more and more extensive and strict. As a country with coal as the main energy structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/02B01D53/86B01D53/64
Inventor 李丽唐念邝继府胡将军盘思伟赵宁
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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