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Method for recovering elemental mercury in non-ferrous smelting flue gas

A technology for smelting flue gas and recovery method, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of low mercury adsorption efficiency, high cost, complicated operation process requirements, etc., to improve economic benefits and avoid waste. Effect

Active Publication Date: 2021-01-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned existing solutions still have the following defects or deficiencies: first, the above-mentioned method 2 The adsorption efficiency of mercury under the condition of concentration greater than 1% is low, and its overall performance still needs to be further improved; secondly, the above-mentioned adsorbents need additional steps such as activation of activation solution, separation, and drying to realize the recycling of the adsorbent, and the operating procedures are complex. higher cost

Method used

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  • Method for recovering elemental mercury in non-ferrous smelting flue gas
  • Method for recovering elemental mercury in non-ferrous smelting flue gas
  • Method for recovering elemental mercury in non-ferrous smelting flue gas

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Embodiment 1

[0029] A method for recovering mercury from non-ferrous smelting flue gas, comprising the following steps:

[0030] (1) Select the cobalt sulfide / porous carbon composite material with a mass ratio of cobalt sulfide and porous carbon of 5%. The cobalt sulfide / porous carbon composite material is a porous carbon composite material loaded with cobalt sulfide. 2 / g, the cobalt sulfide / porous carbon composite material is used to adsorb mercury in the non-ferrous smelting flue gas, specifically, the concentration of mercury in the above-mentioned non-ferrous smelting flue gas is 1 μg / m 3 , the flue gas temperature is 30°C, and the flow rate of the flue gas relative to 1kg cobalt sulfide / porous carbon composite material is 8m 3 / h, the main component of the non-ferrous smelting flue gas, by volume percentage: O2 : 4%; SO 2 : 4%; H 2 O: 1%.

[0031] (2) Utilize the above-mentioned cobalt sulfide / porous carbon composite material to adsorb mercury in the nonferrous smelting flue gas, ...

Embodiment 2

[0035] A method for recovering mercury from non-ferrous smelting flue gas, comprising the following steps:

[0036] (1) Select the cobalt sulfide / porous carbon composite material with a mass ratio of cobalt sulfide and porous carbon of 30%. The cobalt sulfide / porous carbon composite material is a porous carbon composite material loaded with cobalt sulfide. 2 / g, the cobalt sulfide / porous carbon composite material is used to adsorb mercury in the non-ferrous smelting flue gas, specifically, the concentration of mercury in the above-mentioned non-ferrous smelting flue gas is 4000μg / m 3 , the flue gas temperature is 20°C, and the flow rate of the flue gas relative to 1kg cobalt sulfide / porous carbon composite material is 20m 3 / h, the main component of the non-ferrous smelting flue gas, by volume percentage: O 2 : 15%; SO 2 : 15%; H 2 O: 16%.

[0037] (2) Utilize the above-mentioned cobalt sulfide / porous carbon composite material to adsorb mercury in the nonferrous smelting f...

Embodiment 3

[0040] A method for recovering mercury from non-ferrous smelting flue gas, comprising the following steps:

[0041] (1) Select the cobalt sulfide / porous carbon composite material with a mass ratio of cobalt sulfide and porous carbon of 5%. 2 / g, the cobalt sulfide / porous carbon composite material is used to adsorb mercury in the non-ferrous smelting flue gas, specifically, the concentration of mercury in the above-mentioned non-ferrous smelting flue gas is 1 μg / m 3 , the flue gas temperature is 30°C, and the flow rate of the flue gas relative to 1kg cobalt sulfide / porous carbon composite material is 6m 3 / h, the main component of the non-ferrous smelting flue gas, by volume percentage: O 2 : 4%; SO 2 : 15%; H 2 O: 1%.

[0042] (2) Utilize the above-mentioned cobalt sulfide / porous carbon composite material to adsorb mercury in the nonferrous smelting flue gas, obtain the cobalt sulfide / porous carbon composite material after adsorbing mercury; the effect of adsorbing element...

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Abstract

The invention discloses a recovery method of elemental mercury in nonferrous smelting flue gas, and the method comprises the following steps: adsorbing elemental mercury in nonferrous smelting flue gas at the temperature of less than 50 DEG C by using a cobalt sulfide / porous carbon composite material as an adsorbing material, and heating the cobalt sulfide / porous carbon composite material adsorbing elemental mercury to 200 DEG C or above to perform mercury removal treatment, and recycling the volatilized mercury vapor through condensation; wherein the cobalt sulfide / porous carbon composite material subjected to mercury removal treatment can be directly returned to be used for adsorbing elemental mercury in nonferrous smelting flue gas, flue gas mercury generated in the nonferrous smeltingprocess can be effectively recycled, mercury resource waste is avoided, and the economic benefits of nonferrous smelting are increased.

Description

technical field [0001] The invention relates to a method for recovering elemental mercury in nonferrous smelting flue gas, in particular to a method for recycling the cobalt sulfide / porous carbon composite material through adsorption and recovery of elemental mercury in nonferrous smelting flue gas The method belongs to the technical field of non-ferrous smelting flue gas treatment. Background technique [0002] Mercury is a toxic heavy metal that can be released into the atmosphere along with the flue gas during the non-ferrous smelting process, causing harm to the human body and the environment. Due to the different forms of flue gas mercury, the removal methods of flue gas mercury in non-ferrous smelting can include: removing particulate mercury (Hg p ), remove oxidized mercury (Hg 2 +). While elemental mercury (Hg 0 ) is difficult to remove due to high volatility, low water solubility and chemical inertness. [0003] At present, the non-ferrous smelting industry ado...

Claims

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Application Information

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IPC IPC(8): B01D53/02B01J20/20B01J20/30
CPCB01D53/02B01D2253/102B01D2253/1128B01D2257/602B01D2259/40088B01J20/0266B01J20/20
Inventor 沈锋华刘恢向开松谢小峰易慧敏刘操贺子琪李超芳
Owner CENT SOUTH UNIV
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