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Chemical wastewater advanced treatment agent, preparation method and application

A technology for advanced treatment of chemical wastewater, applied in water/sewage treatment, natural water treatment, chemical instruments and methods, etc., can solve the problems of limited application, poor removal of organic pollutants, and demanding ratio requirements, etc., to achieve good economic benefits and social benefits, improve the effect of flocculation and settlement, and reduce the cost of advanced treatment

Inactive Publication Date: 2021-05-14
合肥沁川环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Fenton oxidation method can have a good removal effect on various refractory organic wastewater, and has the advantages of fast reaction speed and stable treatment effect. 2 o 2 with Fe 2+ The ratio of the ratio is demanding, and after the reaction, a large amount of alkali needs to be added to adjust the pH value, resulting in a large amount of chemical sludge, which makes the treatment cost high and the treatment process complicated
[0004] Coagulation technology is mainly to add coagulant to wastewater, such as inorganic coagulant polyaluminum chloride, polyaluminum sulfate, polyferric chloride, polyferric sulfate, etc. The colloidal macromolecular pollutants suspended in the wastewater are polymerized, precipitated and removed through the combined action of the particles and the groups with positive (negative) charges. It has the advantages of simple operation and low treatment cost, but its solubility The removal effect of organic pollutants is poor, and the wastewater after coagulation treatment still has high chroma and COD
[0005] For the decolorization of chemical wastewater, the organic decolorizer commonly used in China - dicyandiamide formaldehyde resin and its derivatives, is affected by the raw materials and preparation process, and the finished product contains high free formaldehyde and amine small molecular organic matter, although It has a good decolorization effect on chemical wastewater, but adding it in the advanced treatment stage will increase the ammonia nitrogen content and COD value in the wastewater, thus limiting its application in advanced wastewater treatment
[0006] Coking wastewater, printing and dyeing wastewater, and pharmaceutical intermediate wastewater often contain high chroma, total phosphorus, ammonia nitrogen and COD after anaerobic or aerobic biochemical treatment. After advanced treatment with inorganic coagulants, although total phosphorus has Good removal effect, but chromaticity and COD still cannot meet the emission standards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment provides a chemical wastewater advanced treatment agent and a preparation method thereof.

[0040] A chemical wastewater advanced treatment agent, comprising the following components in parts by weight: 10 parts of activated carbon, 5 parts of diatomite, 10 parts of polymeric iron salt, 6 parts of polymeric aluminum salt, 5 parts of magnesium salt, polydimethyldiallyl 1 part of ammonium chloride, 63 parts of distilled water.

[0041] The preparation method of the chemical wastewater advanced treatment agent comprises the following steps:

[0042] (1) Preparation of the first mixture: First, add 50 parts of distilled water into the reactor, then add 10 parts of polyferric salt, 6 parts of polyaluminum salt, 5 parts of diatomaceous earth and 5 parts of magnesium salt in sequence, at room temperature, Stir evenly at a speed of 60-80 r / min for 1 h-1.5 h to obtain the first mixture;

[0043] (2) Preparation of the second mixture: Add 10 parts of powdered co...

Embodiment 2

[0046] This embodiment provides a chemical wastewater advanced treatment agent and a preparation method thereof.

[0047]A chemical wastewater advanced treatment agent, comprising the following components in parts by weight: 10 parts of activated carbon, 5 parts of diatomite, 20 parts of polymeric iron salt, 10 parts of polymeric aluminum salt, 10 parts of magnesium salt, polydimethyldiallyl 1 part of ammonium chloride, 44 parts of distilled water.

[0048] The preparation method of the chemical wastewater advanced treatment agent comprises the following steps:

[0049] Preparation of the first mixture: First, 35 parts of distilled water are added to the reactor, and then 20 parts of polyferric salt, 10 parts of polyaluminum salt, 5 parts of diatomaceous earth and 10 parts of magnesium salt are added successively, at room temperature, with 60- Stir evenly at a speed of 80 r / min for 1 h-1.5 h to obtain the first mixture;

[0050] Preparation of the second mixture: Add 10 part...

Embodiment 3

[0053] This embodiment provides a chemical wastewater advanced treatment agent and a preparation method thereof.

[0054] A chemical wastewater advanced treatment agent, comprising the following components by weight: 15 parts of activated carbon, 3 parts of diatomite, 10 parts of polymeric iron salt, 12 parts of polymeric aluminum salt, 7 parts of magnesium salt, polydimethyldiallyl 1 part of ammonium chloride, 52 parts of distilled water.

[0055] The preparation method of the chemical wastewater advanced treatment agent comprises the following steps:

[0056] Preparation of the first mixture: First, 40 parts of distilled water are added to the reactor, and then 10 parts of polyferric salt, 12 parts of polyaluminum salt, 3 parts of diatomaceous earth and 7 parts of magnesium salt are added successively, at room temperature, with 60- Stir evenly at a speed of 80 r / min for 1 h-1.5 h to obtain the first mixture;

[0057] Preparation of the second mixture: add 15 parts of powde...

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PUM

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Abstract

The invention discloses a chemical wastewater advanced treatment agent, a preparation method and application, and belongs to the field of chemical wastewater treatment. The agent comprises activated carbon with the size of 280-300 meshes, diatomite, polymeric ferric salt, polymeric aluminum salt, magnesium salt and poly dimethyl diallyl ammonium chloride, wherein the activated carbon can adsorb organic matters in wastewater and reduce the COD value and chromaticity; magnesium salt can react with phosphate and ammonia nitrogen to form stable precipitate, so that total phosphorus and ammonia nitrogen are removed; the polymeric ferric salt and the polymeric aluminum salt can polymerize, precipitate and remove suspended colloidal macromolecular pollutants; the poly dimethyl diallyl ammonium chloride is a high-molecular cationic flocculant, and also has an excellent decolorizing effect. Through the synergistic effect of the adsorbent and the coagulant, chromaticity, ammonia nitrogen, total phosphorus and COD in wastewater can be better removed, meanwhile, the advanced treatment agent is easy to add and convenient to operate, the wastewater advanced treatment cost can be effectively reduced, and good economic benefits and social benefits are achieved.

Description

technical field [0001] The invention belongs to the field of chemical wastewater treatment, and in particular relates to a chemical wastewater advanced treatment agent, a preparation method and an application. Background technique [0002] As the country becomes more and more strict on environmental protection, the advanced treatment technology and pharmaceutical development of chemical wastewater have received extensive attention. Chemical wastewater, such as coking wastewater, printing and dyeing wastewater, pharmaceutical intermediate wastewater, etc., often still contains high chroma, total phosphorus, ammonia nitrogen and COD after anaerobic or aerobic biochemical treatment. Currently, Fenton technology, coagulation Technology etc. for in-depth processing. [0003] The Fenton reaction refers to the hydrogen peroxide (H 2 o 2 ) at Fe 2+ Under the catalysis of salt, the reaction of hydroxyl radicals is generated. Through this technology, the refractory organic matter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/52C02F1/56C02F101/10C02F101/16C02F103/34C02F103/36
CPCC02F1/283C02F1/5236C02F1/5254C02F1/5272C02F1/56C02F2101/105C02F2101/16C02F2103/343C02F2103/365
Inventor 陈娟
Owner 合肥沁川环保科技有限公司
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