Device for improving phosphoric acid recovery rate and aluminum removal rate of aluminum part chemical polishing waste acid and preparation process

By integrating the process of bag filter, electro-oxidation equipment, diffusion dialysis membrane and full-bed resin equipment, the problem of low acid recovery rate and aluminum ion removal rate in the existing technology has been solved, and efficient recovery of phosphoric acid and aluminum ions has been achieved, improving It improves the waste acid recycling rate and the quality of recovered acid, and reduces production costs.

CN118063037APending Publication Date: 2024-05-24SHENZHEN RECY ENVIROTECH CO LTD
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Patent Information

Application Number
CN202410366078.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-03-28
Publication Date
2024-05-24

AI Technical Summary

Technical Problem

The existing technology has the problem of low acid recovery rate and low aluminum ion removal rate when treated alone, and cannot effectively separate aluminum ions from waste phosphoric acid.

Method used

By integrating bag filters, electro-oxidation equipment, diffusion dialysis membrane equipment and full-bed resin equipment connected by pipelines, pretreatment is achieved, diffusion dialysis membrane technology separates phosphoric acid and aluminum, and full-bed resin equipment acid blocking technology recovers phosphoric acid in waste acid. , combining two technologies to improve aluminum removal rate and phosphoric acid recovery rate.

Benefits of technology

The phosphoric acid recovery rate is ≥85% and the aluminum removal rate is ≥80%, which improves the quality and reuse rate of recovered acid and reduces production costs.

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Abstract

The invention relates to a device for improving the phosphoric acid recovery rate and the aluminum removal rate of aluminum part chemical polishing waste acid and a preparation process. The device consists of a first cloth bag filter, an aeration stirring barrel, a second cloth bag filter, a transfer barrel, an automatic fine filter, a filtrate barrel, electro-oxidation equipment, a cooling water storage barrel, an aluminum removal raw acid temporary storage barrel, diffusion dialysis membrane equipment, a high-aluminum waste acid temporary storage barrel, full-bed resin and a recycled acid storage barrel which are sequentially connected through pipelines. The process comprises the following steps: (1) pretreating to remove organic matters and suspended matters; (2) separating phosphoric acid and aluminum by a diffusion dialysis membrane technology; (3) recovering phosphoric acid in the waste acid by a full-bed acid retardation technology; (4) mixing; and (5) the phosphoric acid recovery rate of the recycled acid obtained by the process is greater than or equal to 85%, and the aluminum removal rate is greater than or equal to 80%.
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