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Oxidative adsorbent for removing mercury from coal-burning flue gas

A coal-fired flue gas and adsorbent technology, which is applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of large practical amount, high price of activated carbon mercury adsorbent, and degraded quality of fly ash.

Inactive Publication Date: 2012-07-11
四川清源环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems that activated carbon mercury adsorbents are expensive, have a large amount of practical use, and cause the quality of fly ash to decline, the present invention provides a composition and preparation method of an oxidative mercury adsorbent for removing mercury in coal-fired flue gas. method

Method used

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  • Oxidative adsorbent for removing mercury from coal-burning flue gas
  • Oxidative adsorbent for removing mercury from coal-burning flue gas

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: Mix 20 g of 150-mesh activated carbon and 80 g of 150-mesh montmorillonite evenly for later use. Take 50mL of ionized water and 50mL of acetone into a beaker, add 0.3g of MnCl 2 Manganese chloride and 0.7g CuCl 2 Copper chloride powder, stir until completely dissolved to form a solution, add 9.0g of a mixture of activated carbon and montmorillonite to the above solution, stir vigorously for 60 minutes, place in a vacuum rotary dryer and dry at 50°C, and finally in a muffle Activation was carried out at 300° C. for 4 hours in a furnace under the protection of nitrogen, and the obtained product was ground to collect particles of 400-200 mesh, ie, 0.037-0.074 mm, to obtain an oxidized mercury absorbent. The adsorbent can achieve a mercury removal rate of more than 85% in the evaluation device shown in the attached figure.

Embodiment 2

[0021] Embodiment 2: Mix 8 g of 150-mesh activated carbon and 92 g of 150-mesh montmorillonite evenly for later use. Take 20mL of ionized water and 80mL of acetone into a beaker, add 0.06g of MnCl 2 Manganese chloride and 0.54g CuCl 2 Copper chloride powder, stir until it is completely dissolved to form a solution, add 9.4g of a mixture of activated carbon and montmorillonite to the above solution, stir vigorously for 60 minutes, place it in a vacuum rotary dryer and dry it at 50°C, and finally protect it under nitrogen Activation was carried out in a muffle furnace at 300°C for 3 hours, and the obtained product was ground to collect particles of 400-200 mesh, ie, 0.037-0.074mm, to obtain an oxidized mercury absorbent. The adsorbent can achieve a mercury removal rate of more than 80% in the evaluation device shown in the attached figure.

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Abstract

The invention provides a preparation method of an oxidative adsorbent for removing mercury from coal-burning flue gas and an application condition thereof. The adsorbent is prepared by taking a mixture of montmorillonite and active carbon as a carrier, taking loaded copper chloride and manganese chloride as active ingredients and taking a mixed solution of water and acetone as a solution as well as a suspending agent through procedures including soaking, evaporative drying, baking, activating, grinding and the like. The adsorbent is used by injecting into flue gas of which the temperature is 60-340 DEG C. The preparation and use costs of the adsorbent are lower than those of an active carbon adsorbent, and over 85 percent of flue gas mercury removing rate can be reached.

Description

Technical field [0001] The patent of the invention relates to an adsorbent used for the pollution control of coal-burning flue gas and the removal of mercury, a heavy metal pollutant in the flue gas. technical background [0002] Mercury and its compounds are important environmental pollutants, which threaten human life and central nervous system, and have obvious toxicity. Mercury is easily released into the environment by human activities or natural sources, and it exists in the environment for a long time. Mercury can migrate through the food chain and accumulate in organisms; and it can migrate between different regions through various environmental cycles. Studies have shown that atmospheric mercury deposition is an important way to cause large-scale pollution and migration of mercury, so inhibiting the emission of mercury into the atmosphere is an important way to control mercury pollution. [0003] It is estimated that the global atmospheric mercury emissions are ab...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01D53/02
Inventor 童华
Owner 四川清源环境工程有限公司
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