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Compound chemical phosphorus removal agent for sewage and preparation method thereof

A chemical phosphorus removal and chemical technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc. There are no problems such as synergistic denitrification effect, achieving good water treatment effect, improving phosphorus removal effect, and simple production process.

Active Publication Date: 2014-08-20
XIAN ENVIROMENTAL PROTECTION IND TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, commercial chemical phosphorus removal agents on the market mainly include polyaluminum chloride, polyferric sulfate, and polyaluminum ferric chloride. Since the aluminum and iron contained in them mainly exist in a polymerized state rather than an ionic state, they interact with phosphorus-containing compounds in sewage. Insufficient, large dosage, poor phosphorus removal effect, high cost of phosphorus removal
When pre-dosing, there is no synergistic denitrification effect, which seriously restricts the promotion and application of chemical phosphorus removal technology

Method used

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  • Compound chemical phosphorus removal agent for sewage and preparation method thereof
  • Compound chemical phosphorus removal agent for sewage and preparation method thereof
  • Compound chemical phosphorus removal agent for sewage and preparation method thereof

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preparation example Construction

[0020] A preparation method of compound sewage chemical phosphorus removal agent is realized by the following steps:

[0021] Step 1: Place FeSO4 7H2O and AlCl3 6H2O solids with a mass ratio of 2.41 to 1.31:1.00 to 2.40 in the reactor, and then add distilled water to the reactor. The mass ratio of distilled water to the mixture in the reactor is 1: 1. Stir to make it dissolve to obtain ferrous sulfate-aluminum chloride liquid;

[0022] Step 2: Add industrial methanol to the ferrous sulfate-aluminum chloride liquid in a ratio of 1 to 6:100 according to the mass ratio of methanol to the ferrous sulfate-aluminum chloride liquid obtained in step 1; Add dimethyl diene with a solid content of 40-42% and a molecular weight of 300,000 to 1,000,000 in a ratio of 0.01% to 1.0:100 between diallyl ammonium chloride and the ferrous sulfate-aluminum chloride liquid prepared in step 1. Propyl ammonium chloride homopolymer;

[0023] Step 3: Mix and stir for 2-3 hours to obtain the product, ...

Embodiment 1

[0026] Step 1: Put FeSO4 7H2O and AlCl3 6H2O solids with a mass ratio of 1.31:1.00 in the reactor and mix them, then add distilled water to the reactor, the mass ratio of distilled water to the mixture in the reactor is 1:1, and stir , make it dissolve, obtain ferrous sulfate-aluminum chloride liquid;

[0027] Step 2: the industrial methanol added to the ferrous sulfate-aluminum chloride liquid in the ratio of 6:100 according to the mass ratio of ferrous sulfate-aluminum chloride liquid prepared by methanol and step 1; Propyl ammonium chloride and the ferrous sulfate-aluminum chloride liquid prepared in step 1 are added in a ratio of 0.01:100 to dimethyl diallyl ammonium chloride with a solid content of 40-42% and a molecular weight of 300,000-1 million Homopolymer;

[0028] Step 3: Mix and stir for 2-3 hours to obtain the product, which is the ferrous sulfate-aluminum chloride-methanol-polydimethyldiallylammonium chloride mixed solution of the phosphorus removal agent of the...

Embodiment 2

[0031] Step 1: Put FeSO4 7H2O and AlCl3 6H2O solids with a mass ratio of 2.41:1.00 in the reactor and mix them, then add distilled water to the reactor, the mass ratio of distilled water to the mixture in the reactor is 1:1, and stir , make it dissolve, obtain ferrous sulfate-aluminum chloride liquid;

[0032] Step 2: the industrial methanol added to the ferrous sulfate-aluminum chloride liquid in the ratio of 4:100 according to the mass ratio of methanol and the ferrous sulfate-aluminum chloride liquid obtained in step 1; Propyl ammonium chloride and the ferrous sulfate-aluminum chloride liquid prepared in step 1 are added in a ratio of 0.1:100 to dimethyl diallyl ammonium chloride with a solid content of 40-42% and a molecular weight of 300,000-1,000,000 Homopolymer;

[0033] Step 3: Mix and stir for 3 hours to obtain the product, which is the ferrous sulfate-aluminum chloride-methanol-polydimethyldiallylammonium chloride mixed solution of the phosphorus removal agent of th...

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Abstract

The invention relates to a compound chemical phosphorus removal agent for sewage and a preparation method thereof. The present chemical phosphorus removal agent is insufficient in action with phosphorous compounds in sewage, high in dosage, poor in phosphorus removal effect and high in phosphorus removal cost. The compound chemical phosphorus removal agent for sewage is a mixed solution of ferrous sulfate, aluminum trichloride, methanol and poly(dimethyl diallyl ammonium chloride); the preparation method of the agent comprises the following steps: putting FeSO4.7H2O and AlCl3.6H2O solids in a mass ratio in a reactor so as to react to obtain a ferrous sulfate-aluminum chloride liquid, adding industrial methanol to the ferrous sulfate-aluminum chloride liquid, next, adding the poly(dimethyl diallyl ammonium chloride) according to a ratio of the poly(dimethyl diallyl ammonium chloride) to the ferrous sulfate-aluminum chloride liquid obtained in the first step, and mixing and stirring to obtain the compound chemical phosphorus removal agent for sewage. The compound chemical phosphorus removal agent for sewage has the characteristics of good phosphorus removal effect and simultaneous consideration to denitrification, and thus can be widely applied to the fields of industrial wastewater treatment and domestic wastewater treatment, and has excellent water treatment effect.

Description

technical field [0001] The invention belongs to the technical field of chemical phosphorus removal, and in particular relates to a preparation method of a composite sewage chemical phosphorus removal agent. Background technique [0002] Phosphorus and nitrogen fertilizers are widely used in agricultural production in my country, and urban residents use a large amount of phosphorus-containing washing powder to wash clothes, resulting in a total phosphorus content of 5-20 mg / L in domestic and production sewage. Nitrogen and phosphorus are biological nutrients. If not controlled, It can cause eutrophication of water body, lead to algae outbreak, cause foul smell and bad appearance in water body, and seriously affect the quality of water environment. [0003] In order to effectively reduce the content of nitrogen and phosphorus in wastewater, sewage treatment plants usually use biotechnology. Biological nitrogen and phosphorus removal has the characteristics of no additives and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58
Inventor 邸诗雨邸尚志苏林东赵胜美
Owner XIAN ENVIROMENTAL PROTECTION IND TRADE
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