Coalification wastewater membrane concentrate treatment agent and preparation method thereof

By using a treatment agent composed of modified diatomaceous earth and starch, the synergistic effect of hydroxyl and carboxyl groups is utilized to adsorb and complex organic matter and heavy metals, forming a stable flocculation structure. This solves the problem of removing high concentrations of organic matter and high salt content from the membrane concentrate of coal chemical wastewater, and improves treatment efficiency and equipment stability.

CN119977018BActive Publication Date: 2026-06-26SICHUAN KUNZHI HAOYU TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN KUNZHI HAOYU TECH CO LTD
Filing Date
2025-02-19
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

High concentrations of recalcitrant organic matter and high salinity in coal chemical wastewater membrane concentrate are difficult to remove effectively, leading to problems such as low treatment efficiency, high cost, and equipment scaling.

Method used

The treatment agent, composed of modified diatomaceous earth and modified starch, adsorbs organic pollutants through the hydroxyl and siloxane groups on the surface of modified diatomaceous earth, and complexes heavy metal ions with the carboxyl groups on the surface of modified starch. Combined with sodium persulfate and polyacrylamide, a stable flocculation structure is formed, achieving a synergistic effect of multiple components.

Benefits of technology

It improves the removal efficiency of organic matter and heavy metal ions in coal chemical wastewater, forms a stable floc structure, prevents secondary release of pollutants, reduces treatment costs, and extends equipment life.

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Abstract

The present application belongs to the field of coal chemical wastewater membrane concentration liquid treatment, and discloses a coal chemical wastewater membrane concentration liquid treatment agent and a preparation method thereof. The coal chemical wastewater membrane concentration liquid treatment agent comprises the following raw materials in parts by weight: 20-40 parts of sodium persulfate, 1-5 parts of polyacrylamide, 30-50 parts of modified diatomite and 10-30 parts of modified starch; wherein the modified diatomite is obtained by ring-opening reaction of silanization modified diatomite and beta-cyclodextrin, and the modified starch is obtained by oxidation ring-opening reaction after pretreatment of starch with Na2S. Through the dual modification and synergistic effect of the modified diatomite and the modified starch, the present application realizes efficient removal of organic matters and heavy metal ions in coal chemical wastewater. The hydroxyl and siloxane groups on the surface of the modified diatomite and the beta-cyclodextrin coating can simultaneously adsorb various types of organic pollutants, and the carboxyl groups on the surface of the modified starch are used for complexing heavy metal ions, thereby improving the treatment efficiency.
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