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High-efficiency composite dephosphorization agent and preparation method thereof

A compound phosphorus removal agent and high-efficiency technology, applied in the field of water treatment, can solve the problems of poor stability of the compound phosphorus removal agent, affect the phosphorus removal effect, and affect the color of the water body, so as to improve the basicity and stability, and improve the phosphorus removal Effect, the effect of reducing the chroma of water

Inactive Publication Date: 2019-05-31
宁波华昕环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong hydrolysis ability of iron ions, the stability of the composite phosphorus removal agent is poor, which will not only affect its phosphorus removal effect but also affect the color of the water body

Method used

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  • High-efficiency composite dephosphorization agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Put ferrous chloride and iron filings into water, stir evenly to obtain a mixed solution containing iron, use hydrochloric acid to adjust the pH of the mixed solution within 0.5, and then add hydrogen peroxide to the mixed solution to make Fe 2+ Completely oxidized to obtain a ferric chloride solution; add polyaluminum chloride and phosphate to the ferric chloride solution, stir evenly, and use liquid caustic soda to adjust the pH of the solution to 1 to obtain a high-efficiency composite dephosphorization agent. The content of iron element in the phosphorus agent is 11wt.%, the material ratio of iron element and aluminum element is 2:8, the ratio of the material amount of phosphate to the sum of the material amount of iron element and aluminum element is 0.02.

[0019] The high-efficiency composite phosphorus removal agent prepared in this example has a basicity of 50%. The high-efficiency composite phosphorus removal agent prepared in this example was left to stand for...

Embodiment 2

[0021] Put ferrous chloride and iron filings into water, stir evenly to obtain a mixed solution containing iron, use hydrochloric acid to adjust the pH of the mixed solution within 0.5, and then add hydrogen peroxide to the mixed solution to make Fe 2+ Completely oxidized to obtain ferric chloride solution; add polyaluminium chloride and borate to the ferric chloride solution, stir evenly, use liquid caustic soda to adjust the pH of the solution to 2 to obtain a high-efficiency composite dephosphorization agent, the high-efficiency composite The content of iron element in the dephosphorization agent is 11wt.%, the material ratio of iron element and aluminum element is 4:6, and the ratio of the material amount of borate to the sum of the amount of iron element and aluminum element is 0.08.

[0022] The salinity of the high-efficiency composite phosphorus removal agent prepared in this example is 45%. The high-efficiency composite phosphorus removal agent prepared in this example...

Embodiment 3

[0024] Put ferrous chloride and iron filings into water, stir evenly to obtain a mixed solution containing iron, use hydrochloric acid to adjust the pH of the mixed solution within 0.5, and then add hydrogen peroxide to the mixed solution to make Fe 2+ Completely oxidized ferric chloride solution.

[0025] Add polyaluminum chloride and silicate to the ferric chloride solution, stir evenly, adjust the pH of the solution to 2.5 with liquid caustic soda to obtain a high-efficiency composite phosphorus removal agent, and the iron element content in the high-efficiency composite phosphorus removal agent is 11wt.%. , the material ratio of the iron element to the aluminum element is 7:3, and the ratio of the material amount of the silicate to the sum of the material amounts of the iron element and the aluminum element is 0.15.

[0026] The salinity of the high-efficiency composite phosphorus removal agent prepared in this example is 40%. The high-efficiency composite phosphorus remov...

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Abstract

The invention discloses a high-efficiency composite dephosphorization agent and a preparation method thereof and belongs to the technical field of water disposal. The method comprises the steps of adding poly-aluminum chloride and an additive into a ferric trichloride solution, uniformly stirring the mixture, and adopting liquid alkali for adjusting the pH value of the solution to be 1-2.5 to obtain the high-efficiency composite dephosphorization agent, wherein the content of iron element in the high-efficiency composite dephosphorization agent is 11 wt.%, the molar ratio of the iron element to aluminum element is (2-7):(8-3), and the molar ratio of the additive to the sum of the iron element and the aluminum element is 0.02-0.15. The provided method has the advantages of simple operationand low cost; the high-efficiency composite dephosphorization agent prepared by means of the method is high in stability and has a good dephosphorization effect when applied to sewage disposal, and the chromaticity of water is low.

Description

technical field [0001] The invention relates to a phosphorus removal agent and a preparation method thereof, in particular to a high-efficiency composite phosphorus removal agent and a preparation method thereof, and belongs to the technical field of water treatment. Background technique [0002] Urban domestic sewage is mainly the discharge water produced by various kitchen water, washing water and toilet water used in human life. It is mainly non-toxic inorganic salts, containing a large amount of solid suspended matter, chemically or biologically degradable soluble or Colloidal dispersion of organic matter, nitrogen-containing compounds, phosphate, potassium, sodium and heavy metal ions, fungal biota, etc. In recent years, the excess of phosphorus in sewage has gradually caused serious pollution to the environment. Eutrophication of water body will cause algal blooms, a large decrease in dissolved oxygen in water body, and deterioration of water quality. How to effectivel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58
Inventor 马俊华董信华
Owner 宁波华昕环保科技有限公司
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