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Aluminum sulfate-ferric chloride-poly dimethyl diallyl ammonium chloride ternary complex coagulant as well as preparation and application methods thereof

A technology of polydimethyldiallylammonium chloride and ternary compounding, which is applied in the direction of flocculation/sedimentation water/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problems that the effect needs to be improved, and achieve The content and proportion range are reasonable, the performance is stable, and the effect of ensuring safety and reliability

Inactive Publication Date: 2013-03-13
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the composite coagulant prepared by AS and FC or PDMDAAC and its effect in the treatment of raw water with high temperature and high algae content polluted by organic matter or low temperature and low turbidity with algae micro-pollution need to be improved

Method used

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  • Aluminum sulfate-ferric chloride-poly dimethyl diallyl ammonium chloride ternary complex coagulant as well as preparation and application methods thereof
  • Aluminum sulfate-ferric chloride-poly dimethyl diallyl ammonium chloride ternary complex coagulant as well as preparation and application methods thereof
  • Aluminum sulfate-ferric chloride-poly dimethyl diallyl ammonium chloride ternary complex coagulant as well as preparation and application methods thereof

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preparation example Construction

[0038] In conjunction with the accompanying drawings, the aluminum sulfate-ferric chloride-polydimethyldiallylammonium chloride ternary composite coagulant of the present invention is prepared by the following method, namely:

[0039] (1) Put AS dry powder or solution in a mixing tank, add water to prepare a saturated solution of AS, stir the solution at room temperature or under heating conditions, add FC dry powder or solution, continue to add water under stirring to obtain the content of aluminum salt AS (in Al 2 o 3 Mass fraction, the same below) is 4.5% to 9.0%, AS content and FC content (as FeCl 3 The mass fraction meter, the same below) is a binary mixed solution with a ratio of 2.0:1.00 to 2.0:0.25;

[0040] (2) Stir the binary mixed solution at room temperature or under heating conditions, add PDMDAAC colloid or dry powder with a characteristic viscosity value ranging from 0.5 to 4.7 dL / g, and its solid content is 20% to 75% or ( 92±2)%, to obtain a ternary mixed s...

Embodiment 1

[0058] In conjunction with accompanying drawing, the preparation and application method of aluminum sulfate-ferric chloride-polydimethyldiallylammonium chloride ternary composite coagulant of the present invention are:

[0059] The first step is to put AS in the mixing reactor whose quality index meets the requirements of the national chemical industry standard (HG2227-2004), and its molecular formula is Al 2 (SO 4 ) 3 ·xH 2 O, where: x is a natural number. Add water to make it into a solution with an AS content of 8.5%±0.5%. Stir the solution at room temperature from -5 to 35°C, add FC dry powder or solution that meets the requirements of the national standard (GB4482-2006), and continue to add water under stirring to get The content of aluminum salt AS is 8.5%±0.5%, and the ratio of AS content to FC content is 3:1 binary mixed solution;

[0060] In the second step, the binary mixed solution is stirred at room temperature at -5 to 35°C, and the solid content is (45±5)% in...

Embodiment 2

[0073] In conjunction with accompanying drawing, the preparation and application method of aluminum sulfate-ferric chloride-polydimethyldiallylammonium chloride composite coagulant of the present invention are:

[0074] The first step is to put AS in the mixing reactor whose quality index meets the requirements of the national chemical industry standard (HG2227-2004), and its molecular formula is Al 2 (SO 4 ) 3 ·xH 2 O, where: x is a natural number. Add water to make it into a solution with an AS content of 8.5%±0.5%. Stir the solution at room temperature from -5 to 35°C, add FC dry powder or solution that meets the requirements of the national standard (GB4482-2006), and continue to add water under stirring to get The content of aluminum salt AS is 8.5%±0.5%, and the ratio of AS content to FC content is 4:1 binary mixed solution;

[0075] In the second step, the binary mixed solution is stirred at room temperature at -5 to 35°C, and the solid content is (60±5)% in terms o...

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Abstract

The invention discloses an aluminum sulfate-ferric chloride-poly dimethyl diallyl ammonium chloride ternary complex coagulant as well as preparation and application methods thereof. The preparation method comprises the following steps of: putting AS (Aluminum Salt) dry powder or solution in a mixed reactor, adding water to blend into an AS saturated solution, stirring the solution, adding FC (FeCl3) dry powder or solution, stirring while continuously adding water to blend so as to obtain a binary mixed solution; and stirring the binary mixed solution, adding PDMDAAC (Poly Dimethyl Diallyl Ammonium Chloride) colloid or dry powder to obtain a ternary mixed solution and continuously stirring the mixed solution until the PDMDAAC colloid is fully dissolved to obtain a stable AS-FC-PDMDAAC ternary complex coagulant which is diluted with water in any proportion or directly added for various kinds of raw water. The series of ternary complex coagulant provided by the invention can be used for various raw water coagulation treatments and waste sewage flocculation treatments as well as dewatering process of sludge and silt in single dosage mode according to the direct dosage amount requirement, and the use method is extremely convenient and simple.

Description

technical field [0001] The invention relates to a compound preparation technology of an inorganic salt coagulant and a water-soluble organic cationic polymer, in particular to a ternary compound of aluminum sulfate-ferric chloride-polydimethyldiallylammonium chloride Coagulants and methods for their preparation and use. Background technique [0002] Aluminum Sulfate (Aluminum Sulfate, AS) is a widely used inorganic brine treatment agent, its molecular formula is as follows: [0003] Al 2 (SO 4 ) 3 ·xH 2 O (Formula 1) [0004] Among them, x is a natural number, the relative molecular mass of AS [in Al 2 (SO 4 ) 3 Count]: 342.15 [0005] Aluminum sulfate is a traditional low-molecular-weight aluminum brine treatment agent. Because of its low price and the turbidity removal effect can still meet the requirements when the water temperature is appropriate, it is still used by some water plants that use inland rivers and lakes as water sources. However, there is a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C02F11/14
Inventor 张跃军李潇潇赵晓蕾
Owner NANJING UNIV OF SCI & TECH
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