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Organic high molecular composite flocculant and preparation method thereof

A technology of organic macromolecule and composite flocculant, applied in dewatering/drying/concentrating sludge treatment and other directions, can solve the problems of waste of chemicals and complex treatment process, and achieve the effects of sufficient sources, reasonable preparation and low cost

Active Publication Date: 2012-04-18
国能辽宁环保产业集团有限公司材料分公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to provide an organic polymer composite flocculant mainly used for municipal or industrial sludge dewatering treatment and its preparation method, which solves the complex treatment process, waste of chemicals and secondary pollution in the prior art. The problem is that the raw material source of the flocculant is sufficient, the preparation is reasonable, the cost is low, the process is simple, the operation is safe, the use is convenient, the dosage is low, the performance is stable, the dissolution is rapid, the suspended matter separation speed is fast, the dehydration efficiency is significantly improved, the scope of application is expanded, and it is effective Prevent the fluctuation of the treatment effect and reduce the secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Into the 4-ton reactor, the required amount of tap water was added sequentially as a dispersant, and the stirring speed was 65 rpm. Add 16 kg of oxidized starch, add 80 kg of polydimethyldiallyl ammonium chloride (content 40%, intrinsic viscosity 80mL / g), add polyacrylamide (powder solid, ion degree 70% , molecular weight 6 million) 32 kg. The interval between feeding each raw material is 7 minutes, the feeding rate of polyacrylamide is 5Kg / min, and the polyacrylamide is dispersed into the reactor with a high-pressure water gun at the same time. After adding water to the calibrated volume, stir. The total compounding time is 1.5 hours. The compounding temperature in the reactor is 10°C. The polyacrylamide particles are uniformly dispersed and swelled into small micelles of 0.5-2cm until the molecular weight of the liquid reaches 6 million. Reaching 80%, that is, a liquid organic polymer composite flocculant with an effective content of 2% in dry weight of raw materials...

Embodiment 2

[0038] Into the 4-ton reactor, the required amount of tap water was sequentially added as a dispersant, and the stirring speed was 50 rpm. Add 10 kg of phosphate starch, add 54.5 kg of polydimethyldiallyl ammonium chloride (35% content, intrinsic viscosity 100mL / g), and add polyacrylamide A (powder solid, ionic 30%, molecular weight 12 million) 128 kg, add polyacrylamide B (powder solid, ionicity 80%, molecular weight 5 million) 32 kg. The interval between feeding each raw material is 10 minutes, the feeding rate of polyacrylamide is 8Kg / min, and the polyacrylamide is dispersed into the reactor with a high-pressure water gun at the same time. After adding water to the calibrated volume, stir. The total compounding time is 3 hours. The compounding temperature in the reactor is 50°C. The polyacrylamide particles are uniformly dispersed and swelled into small micelles of 0.5-2cm until the molecular weight of the liquid reaches 10 million. Reaching 50%, that is, a liquid organic ...

Embodiment 3

[0041] Into the 4-ton reactor, add the required amount of tap water as a dispersant in sequence, and the stirring speed is 80 rpm. Add 18 kg of cross-linked starch, add 3.6 kg of polydimethyldiallyl ammonium chloride (55% content, intrinsic viscosity 130mL / g), and add polyacrylamide A (powder solid, ionic 40%, molecular weight 10 million) 10 kg, add polyacrylamide B (powder solid, ionicity 60%, molecular weight 8 million) 10 kg. The interval between feeding each raw material is 5 minutes, the feeding rate of polyacrylamide is 3Kg / min, and the polyacrylamide is dispersed into the reactor with a high-pressure water gun at the same time. After adding water to the calibrated volume, stir. The total compounding time is 0.5 hours. The compounding temperature in the reactor is 20°C. The polyacrylamide particles are uniformly dispersed and swelled into small micelles of 0.5-2cm until the molecular weight of the liquid reaches 4 million. Reaching 40%, that is, a liquid organic polymer...

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Abstract

The invention discloses an organic high molecular composite flocculant which is mainly used for municipally or industrially dewatering sludge and a preparation method thereof, which solve the problems of complex treatment process, agent waste, secondary pollution and the like existing in the prior art. The flocculant comprises polyacrylamide, polydimethyldiallylammonium chloride and modified starch serving as raw materials and the dry weight ratio of polyacrylamide to polydimethyldiallylammonium chloride to modified starch is 4-9:0.5-5:0.5-5, wherein tap water or de-ionized water is used as adispersing agent; and the liquid organic high molecular composite flocculant, of which the molecular weight is 4,000,000 to 12,000,000, the ionization degree is 40 to 80 percent and the effective content of the raw material is 1 to 5 percent based on dry weight, is prepared by dispersing the materials in a reactor at the temperature of between 10 and 50 DEG C with stirring and compounding for 0.5to 3 hours. The flocculant has the advantages of sufficient raw material sources, low cost, simple process flow, stable performance and high suspension separation speed, is reasonably prepared and quickly dissolved and is safe to operate, and convenient to use, saves the amount, obviously improves the dehydration efficiency, expands the application range, prevents fluctuation of treatment effect and reduces secondary pollution.

Description

technical field [0001] The invention relates to a flocculant for sludge dewatering, in particular to an organic polymer composite flocculant mainly used for municipal or industrial sludge dewatering and a preparation method thereof. Background technique [0002] As we all know, municipal or industrial sludge water is different from ordinary wastewater. The reason is that municipal or industrial sludge water contains higher concentration of suspended solids, higher organic components in suspended solids, and more complex components. With the change of industrial production cycle and the change of industrial production cycle, the characteristics of sludge are also constantly changing. The performance and scope of application of existing sludge dewatering agents cannot meet the requirements of efficient and rapid dehydration treatment of municipal or industrial sludge water. [0003] According to some literature reports, the mainstream flocculants currently used for sludge dewa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/14C08F126/02
Inventor 王刚赵一玲吴雄伟闫洪坤卢一平曾凡龙张绪
Owner 国能辽宁环保产业集团有限公司材料分公司
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