Composite phosphorus removal agent, preparation method and application thereof

CN119430414BActive Publication Date: 2026-05-29MATERIAL BRANCH OF GUONENG LIAONING ENVIRONMENTAL PROTECTION IND GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MATERIAL BRANCH OF GUONENG LIAONING ENVIRONMENTAL PROTECTION IND GRP CO LTD
Filing Date
2024-09-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing chemical phosphorus removal agents have problems such as poor phosphorus removal effect, large dosage, low cost-effectiveness, insignificant effect under low temperature conditions, and easy introduction of secondary pollution and excessive heavy metals in water.

Method used

A composite dephosphorization agent is used, which includes modified inorganic polymer coagulant, modified natural polymer, inorganic salt, coagulant aid and solvent. It is prepared through a specific ratio and process to form a highly charged, high molecular weight suspension with strong adsorption capacity. It can quickly flocculate and precipitate at low temperatures, reducing sludge production.

Benefits of technology

It achieves rapid flocculation and sedimentation under low temperature conditions, efficiently removes phosphorus and turbidity, reduces production costs and the risk of secondary pollution, and is suitable for wastewater treatment in low-temperature environments.

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Abstract

The present disclosure relates to a composite phosphorus removal agent and a preparation method and application thereof, the composite phosphorus removal agent comprising 45wt%-75wt% of modified inorganic high molecular coagulant, 2wt%-15wt% of modified natural high molecular polymer, 5wt%-40wt% of inorganic salt, 0.5wt%-5wt% of coagulant aid and 0.1wt%-0.5wt% of solvent; wherein the modified inorganic high molecular coagulant comprises modified polyaluminum chloride and / or modified polyaluminum ferric chloride; the basicity of the modified inorganic high molecular coagulant is 40-85wt%; the modified natural high molecular polymer comprises one or more of dimethyldiallylammonium chloride-acrylamide-modified starch copolymer and methacryloyloxyethyl trimethyl ammonium chloride-acrylamide-modified starch copolymer; the relative molecular mass of the modified natural high molecular polymer is 50-4.5 million. The composite water purifying agent of the present disclosure has low cost, simple production and preparation method, does not introduce too much metal salt, does not produce secondary pollution and metal exceeding standard in water body, and has better effect on phosphorus and turbidity removal under low water temperature condition.
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