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Inorganic and organic composite coagulant and preparation method and application thereof

A coagulant and organic technology, applied in the field of coagulant preparation, can solve the problems affecting the stability and performance of the composite coagulant, unsatisfactory treatment effect, large amount of sludge, etc., to avoid secondary metal Pollution, fast onset, fast clarification effects

Inactive Publication Date: 2016-01-06
SHIJIAZHUANG LANJIANG BIOLOGICAL ENVIRONMENT PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic coagulants include inorganic salt coagulants, such as aluminum sulfate, ferric chloride, ferrous sulfate, etc., inorganic polymer coagulants, such as polyaluminum chloride, polyferric sulfate, etc. It has the characteristics of good performance, wide application range of water temperature and pH, and fast growth of flocs. Its main disadvantage is that it produces a large amount of sludge.
Organic polymer coagulants, such as polyacrylamide, polymerized dimethyl diallyl ammonium chloride, etc., have the advantage of less dosage, but the disadvantage is high cost
There are certain problems in the use of a single coagulant, which often leads to unsatisfactory treatment effects. The inorganic-organic composite coagulant composed of an inorganic coagulant and an organic coagulant has a net effect that cannot be compared with traditional coagulants. The water effect and advantages have become a hot spot in research and use at present, but the compound coagulant prepared by the method of compounding affects the stability and performance of the compound coagulant due to the differences in the physical and chemical properties of the various components, often resulting in compound coagulants. The coagulant has problems such as stratification and turbidity due to changes in the external environment during storage, and it is not easy to disperse and dissolve during use.

Method used

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  • Inorganic and organic composite coagulant and preparation method and application thereof
  • Inorganic and organic composite coagulant and preparation method and application thereof
  • Inorganic and organic composite coagulant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment relates to the preparation of a group of inorganic-organic composite coagulants, using the following steps:

[0022] A, add dimethyl diallyl ammonium chloride into water according to a certain weight ratio, stir evenly, obtain dimethyl diallyl ammonium chloride solution;

[0023] B, add a certain amount of ferric chloride in the dimethyl diallyl ammonium chloride solution that step a obtains, continue to stir, obtain mixed solution;

[0024] c. Add an initiator to the mixed solution obtained in step b, stir and react at high temperature to obtain an inorganic-organic composite coagulant;

[0025] Each conditional parameter of above-mentioned preparation process is shown in the following table:

[0026]

[0027] Examples 1.1-1.3 are inorganic-organic composite coagulants obtained by the preparation method of the present invention, and Examples 1.4-1.6 are inorganic-organic composite coagulants whose preparation conditions are not within the scope of t...

Embodiment 2

[0029] This example relates to the verification of the physical and chemical properties and application effects of the inorganic-organic composite coagulant prepared in Example 1.

[0030] The physical and chemical properties of the inorganic-organic composite coagulant are tested as follows: use a pH meter to measure the pH value of the 1% aqueous solution of the inorganic-organic composite coagulant; use a density meter and a viscometer to measure the density value of the inorganic-organic composite coagulant at 25°C and viscosity value; use the Clˉ content precipitation titration method in balance with the cation, and refer to the detection of Clˉ in GB / T15453-2008 to determine the cationic degree of the inorganic-organic composite coagulant.

[0031] The use effect of the inorganic-organic composite coagulant is evaluated by the flocculation and sedimentation experiment: a flocculation and sedimentation experiment is carried out on a vitamin C fermentation broth (its initia...

Embodiment 3

[0037] This embodiment relates to the inorganic-organic composite coagulant (A) obtained by compounding the inorganic-organic composite coagulant of Examples 1.1 to 1.3 with ferric chloride and polymerized dimethyl diallyl ammonium chloride homopolymer. Inorganic-organic composite coagulant (B) compounded with polyferric chloride and polydimethyldiallylammonium chloride homopolymer, and combined with conventionally used polyaluminum chloride and polyacrylamide (C) The comparative verification of the stable performance and the use effect for treating biopharmaceutical wastewater and fermentation wastewater, the effect experiment is the same as in Example 2, and the comparison of COD removal rate is increased, and the detection of COD adopts the national standard GB11914-1989 Water Quality_Chemical Requirements Oxygen Determination - Potassium Dichromate Method. The results are shown in the table below:

[0038]

[0039] It can be seen from the results in the above table tha...

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Abstract

The invention relates to a preparation method of an inorganic and organic composite coagulant. Dimethyl diallyl ammonium chloride and water are mixed, ferric chloride and an initiator are sequentially added, the mixture is reacted at 85 DEG C-95 DEG C, and then the inorganic and organic composite coagulant is obtained. By means of the preparation method, the uniformity, stability and use effect of the composite coagulant can be improved, the prepared composite coagulant is not prone to layering, has good dispersion performance in use, takes effect fast and is high in sedimentation and clarification speed and good in treatment effect, and solid floc particles can be formed. The inorganic and organic composite coagulant is high in charge density and suitable for treating biological pharmacy wastewater and fermentation wastewater.

Description

technical field [0001] The invention relates to a preparation method of a coagulant, in particular to a preparation method of an inorganic-organic composite coagulant, and at the same time, the invention also relates to the inorganic-organic composite coagulant prepared by the method and its application. Background technique [0002] In the field of environmental protection technology, water treatment agent is the most widely used and used special product in engineering technology fields such as water industry, water pollution control and water saving reuse purification treatment. Aqueous agents are widely used, and currently commonly used coagulants can be divided into inorganic coagulants, organic polymer coagulants, composite coagulants and microbial coagulants according to their chemical composition. Inorganic coagulants include inorganic salt coagulants, such as aluminum sulfate, ferric chloride, ferrous sulfate, etc., inorganic polymer coagulants, such as polyaluminum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/54
Inventor 赵永强刘岩王卓
Owner SHIJIAZHUANG LANJIANG BIOLOGICAL ENVIRONMENT PROTECTION TECH CO LTD
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