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Inorganic-organic composite chemical dephosphorization agent preparation method

A chemical phosphorus removal agent and chemical phosphorus removal technology, applied in chemical instruments and methods, water softening, water/sewage treatment, etc. The effect of bulky body, small dosage and simple operation

Inactive Publication Date: 2011-03-02
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the pH value of phosphorus removal by lime method should usually be controlled above 10, too high pH will inhibit and destroy the proliferation and activity of microorganisms, and the pH value of wastewater after phosphorus removal by lime method is often high, so it is not conducive to standard discharge, relatively few application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put 90Kg of deionized water into the enamel reactor with agitator and heating jacket, add 12kg of crystal acrylamide, dissolve completely, then add 5kg of dimethyl diallyl ammonium chloride solution, 1Kg of methyl Methyl acrylate or 2-acrylamido-2-methylpropanesulfonic acid, after stirring evenly, add the ammonium persulfate of 0.02Kg and the water-soluble azo initiator azobisisobutylamidine hydrochloride of 0.01kg, A chain-initiated polymerization reaction is carried out. The polymerization reaction temperature was controlled at 45.1°C. The polymerization reaction time is 6 hours, then add 100 kg of aluminum sulfate solution with a mass ratio of 30%, and stir evenly to obtain a viscous transparent liquid, which is an inorganic-organic composite chemical dephosphorization agent.

Embodiment 2

[0019] Put 70Kg of deionized water into an enamel reactor with a stirrer and a heating jacket, add 14kg of crystal acrylamide, dissolve completely, then add 3.5kg of dimethylaminoethyl methacrylate quaternary ammonium salt, 3Kg of Acrylic acid, after stirring evenly, add 0.03Kg of ammonium persulfate and 0.015 kg of water-soluble azo initiator 2,2'-azo(2-amidinopropane) dihydrochloride to carry out chain initiation polymerization. The polymerization reaction temperature was controlled at 58°C. The polymerization reaction time is 4 hours, then add 80 kg of polyaluminum sulfate solution with a mass ratio of 15%, and stir evenly to obtain a viscous transparent liquid, which is an inorganic-organic composite chemical dephosphorization agent.

Embodiment 3

[0021] Put 50Kg of deionized water into the enamel reactor with agitator and heating jacket, add 16kg of crystal acrylamide, dissolve completely, then add 8.5kg of dimethyl diallyl ammonium chloride solution, 4.0Kg of Methyl methacrylate or 2-acrylamido-2-methylpropanesulfonic acid, after stirring evenly, add 0.04Kg of ammonium persulfate and 0.02 kg of water-soluble azo initiator 2,2-azo[2- (2-imidazolin-2-yl) propane] dihydrochloride for chain-initiated polymerization. Control the polymerization reaction temperature to 50°C. The polymerization reaction time is 6 hours, then add 80 kg of aluminum sulfate solution with a mass ratio of 30%, and stir evenly to obtain a viscous transparent liquid, which is an inorganic-organic composite chemical dephosphorization agent.

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PUM

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Abstract

The invention discloses an inorganic-organic composite chemical dephosphorizing agent, a preparation method and an application thereof. The preparation method comprises the following steps that: under the protection of fed-in nitrogen gas, non-ion monomer, anion monomer and cation monomer with a certain proportion are selected; polymerization reaction is carried out under the action of a composite initiator at a temperature of between 35 and 70 DEG C for 2 to 6 hours; and then, an inorganic electrolyte and a stabilizer with a certain concentration are added and stirred evenly so as to generate the transparent dense inorganic-organic composite chemical dephosphorizing agent. The invention also comprises an application of the dephosphorizing agent in dephosphorizing treatment of domestic sewage, and has the advantages of less dose, wide pH application range, high dephosphorizing efficiency, coarse floe and quick settling velocity, etc.

Description

technical field [0001] The invention relates to an inorganic-organic compound chemical dephosphorization agent and its preparation method and application. Background technique [0002] Most of the phosphorus in domestic sewage is dissolved inorganic compound phosphorus, mainly from orthophosphate and fused ring phosphate of detergent, and the rest is organic compound phosphorus in dissolved and non-dissolved state. Polycyclic phosphate (such as P 3 o 10 5- ) and organic compound phosphorus (nucleic acid) can generally be converted into orthophosphate in biological treatment. The basic principle of chemical phosphorus removal is to form insoluble phosphate precipitates by adding chemicals, and then remove phosphorus from sewage by solid-liquid separation. Chemical phosphorus removal methods mainly include lime method, aluminum salt precipitation method, and iron salt precipitation method. Because the pH value of phosphorus removal by lime method should usually be control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58C02F5/02C02F1/52
Inventor 胡勇有程建华罗刚罗肖肖
Owner SOUTH CHINA UNIV OF TECH
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