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Sulfuric acid production wastewater treatment method

A technology for wastewater treatment and sulfuric acid production, which is applied in water/sewage treatment, multi-stage water/sewage treatment, neutralized water/sewage treatment, etc. The effect of low cost and simple process

Inactive Publication Date: 2021-06-11
四川恩特普环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to: provide a kind of sulfuric acid production wastewater treatment method, solve the problem that existing sulfuric acid wastewater treatment is not thorough

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  • Sulfuric acid production wastewater treatment method

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Embodiment 1

[0033] A kind of sulfuric acid production wastewater treatment method, comprises the following steps:

[0034] (1) the production waste water of sulfuric acid is passed in the collecting pool and collects;

[0035] (2) adding calcium hydroxide and production waste water in the collection pool to neutralize;

[0036] (3) Add PAM flocculants and PAC flocculants to the neutralized production wastewater for flocculation and sedimentation treatment, so that the calcium sulfate particles in the production wastewater form colloids, and overflow into the sedimentation tank for secondary settlement, and other hydroxides form The precipitated sludge is filtered through a plate and frame filter press;

[0037] (4) The sedimentation sludge produced by the secondary settlement is imported into the sedimentation sludge in step 3 for pressure filtration treatment, the overflow produced by the secondary settlement flows into the ultrafiltration machine for ultrafiltration treatment, and the ...

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Abstract

The invention discloses a sulfuric acid production wastewater treatment method, belongs to the technical field of sulfuric acid production wastewater treatment, and aims at solving the problem that existing sulfuric acid wastewater treatment is not thorough. The method comprises the following steps: (1) introducing sulfuric acid production wastewater into a collecting tank; (2) adding calcium hydroxide to neutralize with the production wastewater; (3) adding a PAM (polyacrylamide) flocculant and a PAC (polyaluminum chloride) flocculant to enable calcium sulfate particles in the production wastewater to form colloid, enabling the colloid to overflow into a sedimentation tank for secondary sedimentation, and carrying out filter pressing treatment on other settled sludge; (4) carrying out filter pressing treatment on settled sludge subjected to secondary settling, introducing overflow subjected to secondary settling into an ultrafilter for ultrafiltration treatment, and introducing generated concentrated liquor into a settling pond for settling again; and (5) introducing the generated clear liquid into a special filter, separating the clear liquid and a heavy metal ion-containing concentrated liquid by virtue of a special filter membrane, introducing the heavy metal ion-containing concentrated liquid into a collecting tank, treating again, and recycling the clear liquid. The method is suitable for sulfuric acid production wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of sulfuric acid production wastewater treatment, and in particular relates to a sulfuric acid production wastewater treatment method. Background technique [0002] Nowadays, sulfuric acid wastewater is produced in various links such as chemical production and ore mining, including the production of sulfur element, sulfur-containing flue gas washing, sulfuric acid production wastewater, slag flushing wastewater, etc. Sulfuric acid wastewater contains pollutants such as sulfuric acid, sulfurous acid, sulfate, and heavy metal ions. If sulfuric acid wastewater is not treated effectively, it will seriously affect the ecological environment. However, the sulfuric acid wastewater treatment process at this stage is not thorough enough to treat pollutants, and there are still certain environmental pollutions, or complicated treatment processes are required to remove various pollutants, which will greatly increase th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/44C02F1/52C02F1/56C02F1/66C02F101/10C02F101/20
CPCC02F9/00C02F1/5245C02F1/56C02F1/66C02F1/444C02F1/44C02F2101/101C02F2101/20
Inventor 郭定江郭乾勇梁志饶蔡松林赵宏凌
Owner 四川恩特普环保科技有限公司
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