Method for treating non-ferrous metal smelting off-gas through copper smelting fume

A technology for non-ferrous metals and smelting flue gas, which is applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve problems affecting economy, high energy consumption, and large consumption, and achieve improved economy, high energy consumption, The effect of less investment

Active Publication Date: 2016-07-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to consume a large amount of external strong oxidant, and the preparation process of strong oxidant consumes a lot of energy, which affects its economy.

Method used

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  • Method for treating non-ferrous metal smelting off-gas through copper smelting fume
  • Method for treating non-ferrous metal smelting off-gas through copper smelting fume
  • Method for treating non-ferrous metal smelting off-gas through copper smelting fume

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Collect and grind the dust in the flue gas of copper smelting and sieve it into 200-400 meshes, then mix it with water in a fixed bed reactor at a mass volume ratio of 5:1 to form an absorption liquid at a temperature of 30°C, prepared by a simulated flue gas system Simulated flue gas, of which 1000ppmSO 2 , 300ppmNO, 30mg / m 3 Hg, 3%O 2 , the simulated flue gas is introduced into the fixed bed reactor to react with the absorption liquid, and the NO and NO in the outlet gas 2 and SO 2 The concentration is detected by a multi-component infrared flue gas analyzer, and the Hg concentration in the inlet and outlet gases is detected by a cold atomic absorption mercury analyzer. Such as figure 1 As shown, in the simultaneous desulfurization, denitrification and demercuration laboratory of copper smelting dust, within 60 minutes, the mercury removal efficiency can be maintained above 90%, the desulfurization efficiency can be maintained above 70%, and the denitrification ef...

Embodiment 2

[0025] Collect and grind the dust in the flue gas of copper smelting and sieve it into 200-400 meshes, then mix it with water in a fixed bed reactor at a mass volume ratio of 7:1 to form an absorption liquid at a temperature of 40°C, prepared by a simulated flue gas system Simulated flue gas, of which 1300ppmSO 2 , 400ppmNO, 40mg / m 3 Hg, 5% O 2 , the simulated flue gas is introduced into the fixed bed reactor to react with the absorption liquid, and the NO and NO in the outlet gas 2 and SO 2 The concentration is detected by a multi-component infrared flue gas analyzer, and the Hg concentration in the inlet and outlet gases is detected by a cold atomic absorption mercury analyzer. Such as figure 2 As shown, in the simultaneous desulfurization, denitrification and demercuration laboratory of copper smelting dust, within 60 minutes, the mercury removal efficiency can be maintained above 90%, the desulfurization efficiency can be maintained above 60%, and the denitrification ...

Embodiment 3

[0027] Collect and grind the dust in the flue gas of copper smelting and sieve it into 200-400 meshes, then mix it with water in a fixed bed reactor at a mass volume ratio of 9:1 to form an absorption liquid at a temperature of 50°C, prepared by a simulated flue gas system Simulated flue gas, of which 1500ppmSO 2 , 500ppmNO, 50mg / m 3 Hg, 7%O 2 , The simulated flue gas is introduced into the fixed bed reactor to react with the absorption liquid, and the NO and NO in the outlet gas 2 and SO 2 The concentration is detected by a multi-component infrared flue gas analyzer, and the Hg concentration in the inlet and outlet gases is detected by a cold atomic absorption mercury analyzer. Such as image 3As shown, in the simultaneous desulfurization, denitrification and mercury removal laboratory of copper smelting dust, within 60 minutes, the mercury removal efficiency can be maintained above 87%, the desulfurization efficiency can be maintained above 65%, and the denitrification e...

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Abstract

The invention discloses a method for treating non-ferrous metal smelting off-gas through copper smelting fume and belongs to the field of wet desulfurization, denitrification and demercuration industrial waste gas treatment. Absorption liquid is formed by mixing the copper smelting fume and water, the non-ferrous metal smelting off-gas reacts with the absorption liquid in a full contact mode, through the catalytic oxidation effect of Cu2+ and other transition metal ions contained in the copper smelting fume, nitric oxide, sulfur oxide and mercury in the off-gas are absorbed, and SO2, NOx and Hg in the off-gas are far lower than the national emission standard. The fume in copper smelting off-gas is directly utilized, no raw material needs to be newly added, the resource utilization rate is high, investment is low, no secondary pollutants are generated, and obvious social and economic benefits are achieved.

Description

technical field [0001] The invention belongs to the field of industrial waste gas treatment, and relates to a method for treating nonferrous metal smelting flue gas with copper smelting dust, specifically a method for removing SO in nonferrous metal smelting flue gas by using copper smelting dust 2 , NO x and Hg's method. Background technique [0002] SO 2 , NO x Hg and Hg are the main pollutants released during the smelting process of non-ferrous metals, which have caused serious harm to the atmospheric environment. my country has also formulated increasingly strict emission standards for this. [0003] At present, the most mature and widely used flue gas desulfurization technology is wet desulfurization technology (WFGD), which has high desulfurization efficiency and stable operation, but consumes a lot of water and has high investment and operating costs. The most widely used technology in flue gas denitrification is selective catalytic reduction technology (SCR). The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/86B01D53/60B01D53/64
CPCB01D53/78B01D53/8637B01D53/8665B01D2257/602B01D2258/025B01D2258/0283Y02A50/20
Inventor 宁平李坤林李凯孙鑫刘娜张贵剑刘烨孙丽娜
Owner KUNMING UNIV OF SCI & TECH
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