Product Brief
Complete Zinc oxide Off-gas Desulfurization Equipment
The complete zinc oxide off-gas desulfurization equipment is applied to remove sulfur dioxide in the off-gas generated from lead-zinc smelters. That is, zinc oxide is used as desulfurization agent to react with SO₂ in the off-gas to generate ZnSO₃, in such way the off-gas is desulfurized.
Specification & Series：Customizable to features and process flow of the process medium, transportation conditions and customer requirements.
- Application Fields：This equipment is applicable to the desulfurization of a variety of off-gas generated from the lead-zinc smelter, with the intermediate product of the smelter, zinc oxide soot being used as the desulfurization agent.
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Advantages & Features
- High desulfurization efficiency. When the SO₂ concentration of inlet off-gas is about 6000mg/Nm³, second-stage absorption is adopted with the average desulfurization efficiency of more than 99%.
- Adopting empty tower spray absorption equipment. The equipment is superior to dynamic wave from the aspect of reaction time and better than turbulent ball tower in terms of anti-blocking.
- The equipment also has the function of comprehensive utilization of waste acid.
- No secondary pollution. The by-products completely return to the smelting process to realize a seamless connection with the desulfurization process.
- Safe operation. Solution is free of strong acid and alkali in the whole process; Except for the original off-gas, the temperature of other solids, liquids and gases shall not be higher than 60 ℃, without scald risk and high-pressure gas.
Working Principle
Zinc oxide desulfurization is such method by adding water in the materials containing zinc oxide powder to prepare slurry which contacts with the low-concentration SO₂ in the off-gas in the absorption equipment to remove SO₂ in the off-gas in the forms of zinc sulfite, zinc sulfate and zinc bisulfite. The zinc sulfite is oxidized to a soluble zinc sulfate solution by the air injected into the bottom of the absorption device.
The Application Achievements
It has been successfully applied to Mengzi lead smelter, Mengzi indium zinc smelter slag treatment, Chengzhou zinc smelter sulfuric acid tail gas treatment, Chengzhou zinc smelter slag treatment, India Deriba lead plant, India HZL company slag treatment and other projects.
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