Phosphorus-containing wastewater recycling and waste resource utilization method

A technology of waste recycling and wastewater, applied in chemical instruments and methods, water pollutants, hypophosphorous acid, etc., can solve the problem of high price, achieve low cost, high economic and social benefits, and easy industrialization.

Inactive Publication Date: 2019-02-01
HONGHU YITAI TECH CO LTD
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  • Claims
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Problems solved by technology

As a phosphorus-containing flame retardant, aluminum phosphate is widely used in

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  • Phosphorus-containing wastewater recycling and waste resource utilization method

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Embodiment Construction

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] Please refer to figure 1 , the embodiments of the present invention provide a method for recycling phosphorus-containing wastewater and recycling waste, comprising the following steps:

[0026] Step S101, adding a calcium-containing basic compound to phosphorus-containing wastewater for neutralization to obtain a mixture of calcium phosphate salt and calcium halide.

[0027] In step S101, most of the calcium phosphate salts are precipitated, and the end point of the neutralization process is that the pH value of the mixture of calcium phosphate salts and calcium halides is 7-8; calcium hydroxide, calcium oxide, slaked lime, quicklime are selected as the calcium-containing basic compound etc. Any one or a mixture of several, the calcium halide in ...

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Abstract

The invention provides a phosphorus-containing wastewater recycling and waste resource utilization method, which comprises: adding a calcium-containing alkaline compound into phosphorus-containing wastewater, and neutralizing to obtain the mixture of a calcium phosphate salt and calcium halide; filtering the mixture to obtain a calcium phosphate salt precipitate and a calcium halide salt solution,adjusting the pH value of the calcium halide salt solution, returning the calcium halide salt solution as a decontamination agent to a decontamination tower, and continuously carrying out decontamination on a halogenated phosphorus compound; when the calcium halide concentration in the calcium halide salt solution reaches a set value, concentrating the calcium halide salt solution, and carrying out cooling solidifying to obtain a calcium halide hydrate; and collecting the calcium phosphate salt precipitate, carrying out a mixing reaction on the calcium phosphate salt precipitate and aluminumhalide, filtering, and drying to obtain an aluminum phosphate salt flame retardant and a calcium halide aqueous solution. The method of the invention has advantages of low cost, easy industrial production, turning of waste into treasure and other practicalities, and further has high value.

Description

technical field [0001] The invention relates to the technical field of utilization of phosphorus-containing wastewater, in particular to a method for recycling phosphorus-containing wastewater and waste resource utilization. Background technique [0002] During the production and use of halogenated phosphorus, it is inevitable that halogenated phosphorus will volatilize from the equipment, which will affect the environment. The effective way to improve the production environment is to decontaminate the decontamination tower, and the decontamination tower decontamination liquid is generally If it is water or an alkaline solution of water, phosphorus-containing wastewater will be formed. The treatment of phosphorus-containing wastewater requires a lot of manpower, material and financial resources, and generates a large amount of solid waste. [0003] Organic polymer materials have been widely used in production and life, but their flammability also poses a major fire hazard. ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C01B25/165C01F11/24C01F11/34C02F101/10
CPCC01B25/165C01F11/24C01F11/34C02F9/00C02F2101/105C02F1/001C02F1/5236C02F1/66
Inventor 成贞辉张业武王炼孙素丽吕从高赵根根李晨亮
Owner HONGHU YITAI TECH CO LTD
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