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Composition for preparing demercuration adsorbent, demercuration adsorbent and preparation method of demercuration adsorbent

An adsorbent and composition technology, which is applied in the field of preparing the composition of the mercury removal adsorbent, can solve the problems of increasing the production cost of the mercury removal adsorbent, high requirements for continuous heat treatment, complicated impregnation process, etc. Effect of flue gas mercury removal ability, reduction of production cost and operation difficulty

Pending Publication Date: 2022-02-11
BEIJING SPC ENVIRONMENT PROTECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The mercury removal adsorbent prepared by the above-mentioned existing process has the disadvantages of complicated impregnation process, high cost of modifier and post-processing. The problem of high requirements for continuous heat treatment increases the production cost of mercury removal adsorbent

Method used

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  • Composition for preparing demercuration adsorbent, demercuration adsorbent and preparation method of demercuration adsorbent

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preparation example Construction

[0044] The preparation method of the modified mercury-removing adsorbent provided by the impregnation method of the present invention is to use the pretreated columnar large particle carbon material as the raw material, add a certain proportion of modifier, and modify by equal-volume impregnation, and finally Prepared by heat treatment process. Such as figure 1 As shown, it specifically includes the following steps:

[0045] Step 1: Prepare the pretreated carbon materials with preset indicators and modifiers of preset varieties according to the requirements of impregnation modification; specifically, the carbon materials are various woody activated carbons, coal-based activated carbons, coal-based activated carbons Activated coke and regenerated activated carbon / activated coke, etc.; the preset indicators are particle size 2mm-10mm, specific surface area 300m 2 / g-600m 2 / g, water capacity 30%-60%; the pretreatment is to immerse the carbon material in a 50%-60% hydrochloric...

Embodiment 1

[0054] First, the selected coal-based columnar granular activated coke has a particle size of 9mm and a specific surface area of ​​350m 2 / g, water capacity 40%, pickled by hydrochloric acid, washed to neutral, dried, then vibrated under vibrating sieve machine for 1min to remove excess carbon powder, set aside. Select hydrogen peroxide as modifier, weigh 100 grams of pretreated carbon material in proportion, measure 40 grams of hydrogen peroxide with a mass fraction of 30% as modifier solution, and the mass ratio of carbon material to modifier is 100:12. Put the carbon material in the hydrogen peroxide solution and let it soak for 24 hours. After impregnation, put it in an oven at 105°C and dry for 24 hours.

[0055] Put the dried impregnated carbon material into a tubular rotary furnace, and set the relevant experimental parameters for heat treatment. In this example, set the heating rate to 5°C / min, and keep it at the final reaction temperature of 450°C for 3 hours, and t...

Embodiment 2

[0058] First, the selected coal-based columnar granular activated coke has a particle size of 9mm and a specific surface area of ​​350m 2 / g, water capacity 40%, pickled by hydrochloric acid, washed to neutral, dried, then vibrated under vibrating sieve machine for 1min to remove excess carbon powder, set aside. Select ammonium chloride as the modifier, weigh 100 grams of pretreated carbon material in proportion, weigh 10 grams of ammonium chloride and dissolve it in 30 grams of water as the modifier solution, and the mass ratio of carbon material to modifier is 100 :10. Put the carbon material in the ammonium chloride solution and let it stand for 24 hours. After impregnation, put it in an oven at 105°C and dry for 24 hours.

[0059] Put the dried impregnated carbon material into a tubular rotary furnace, and set the experimental parameters related to heat treatment. In this example, set the heating rate to 5°C / min, and keep it at the final reaction temperature of 500°C for...

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Abstract

The invention provides a composition for preparing a demercuration adsorbent, the demercuration adsorbent and a preparation method of the demercuration adsorbent. The composition for preparing the mercury removal adsorbent comprises a carbon material and a modifier, the particle size of the carbon material is 2-10 mm, the specific surface area of the carbon material is 300-600 m<2> / g, and the water capacity of the carbon material is 30%-60%. The method for preparing the demercuration adsorbent provided by the invention comprises the following steps: soaking a pretreated carbon material in a modifier solution, and conducting drying to obtain dried carbon; and carrying out heat treatment on the dried carbon material to obtain the mercury removal adsorbent. The preparation method for preparing the demercuration adsorbent is simple in production process, low in preparation cost, high in operability and suitable for industrial production; and the prepared demercuration adsorbent is high in mercury capacity and has relatively high flue gas demercuration capability.

Description

technical field [0001] The invention belongs to the technical field of mercury-containing flue gas treatment, and in particular relates to a combination for preparing a mercury-removing adsorbent Material, mercury removal adsorbent and preparation method thereof. Background technique [0002] The research on the control of mercury has become a hot spot at home and abroad since this century, and the control technologies mainly include Mercury, mercury removal in combustion and flue gas removal. At present, research hotspots mainly focus on mercury removal from flue gas after combustion. The denitrification and dust removal device can remove the divalent mercury and particulate mercury in the flue gas, but the effect on the removal of gaseous elemental mercury is The fruit is mediocre. The best way to treat flue gas containing mercury is recognized as activated carbon injection method or fixed bed adsorption method, both of which are A high-quality mercury removal...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/32B01D53/02
CPCB01J20/20B01J20/3204B01J20/02B01J20/0207B01J20/0296B01J20/046B01J20/28004B01J20/28016B01J20/28076B01J20/28057B01J20/28061B01D53/02B01D2257/602B01D2258/0283
Inventor 昌健龚得喜吕小玲严铭刘丹丹魏艳立左文华
Owner BEIJING SPC ENVIRONMENT PROTECTION TECH
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