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

Method used

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

Examples

Experimental program
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Example Embodiment

[0044] The preparation method of the impregnation method provided by the present invention is a method for preparing a modified dehydrate adsorbent, and is used as a raw material to add a certain proportion of modifier, and modified by an equal volume impregnation. Preparation with a heat treatment process. like figure 1 As shown, specifically includes the following steps:

[0045] Step 1: The modifier of the carbon material and the preset variety of the pre-preset index is prepared according to impregnation modification; specifically, the charcoal material is a variety of wood activated carbon, coal-activated carbon, coal quality Active coke and regenerative activated carbon / active focus, the preset index is a particle size of 2 mm to 10 mm, a specific surface area of ​​300m 2 / g-600m 2 / g, the water capacity is 30% -60%; the pretreatment is to be immersed in a 50% -60% hydrochloric acid solution, then washed with deionized water to neutral and dry, dried The carbon material v...

Example Embodiment

[0053] Example 1

[0054] First, the selected coal columnar particles active focus is 9mm, the specific surface area is 350m. 2 / g, the water capacity is 40%, washed into neutral, dry after washing hydrochloric acid, dry, then vibrates 1min under the vibrating screen, remove excess carbon powder, spare. The hydrogen peroxide is used as a modifier, and 100 grams of pretreatment of carbon material after proportion, and the amount of hydrogen peroxide having a mass fraction is 30% as a modifier solution, the mass ratio of carbon material and the modifier is 100: 12. The carbon material was placed in a hydrogen peroxide solution and allowed to immerse 24 h. After the impregnation was completed, it was placed in a 105 ° C oven and dried 24 h.

[0055] The dried dip carbon material was placed in a tubular rotary furnace, and a heat treatment related experimental parameter is provided. In this embodiment, the temperature increase rate is 5 ° C / min, and maintained at a reaction tempera...

Example Embodiment

[0057] Example 2

[0058] First, the selected coal columnar particles active focus is 9mm, the specific surface area is 350m. 2 / g, the water capacity is 40%, washed into neutral, dry after washing hydrochloric acid, dry, then vibrates 1min under the vibrating screen, remove excess carbon powder, spare. The ammonium chloride is used as a modifier, and 100 grams of pre-treatment after 100 grams of pre-treatment is weighed, and 10 grams of ammonium chloride is soluble in 30 grams of water as a modifier solution, the carbon material and the modifier mass ratio of 100 : 10. The carbon material was placed in a solution of ammonium chloride and allowed to immerse 24 h. After the impregnation was completed, it was placed in a 105 ° C oven and dried 24 h.

[0059] The dried dip carbon material was placed in a tubular rotary furnace, and a heat treatment related experimental parameter is provided. In this embodiment, the temperature increase rate is 5 ° C / min, and the reaction temperatu...

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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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