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Anti-freezing sludge deep dehydration conditioner as well as preparation and application methods thereof

A deep dehydration and conditioning agent technology, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve the problem of high freezing point of liquid sludge conditioner, increased sludge transportation and disposal costs, The problem of large amount of conditioner is added to achieve the effect of improving sludge dewatering performance, improving sludge settling performance, and not producing secondary pollution

Active Publication Date: 2020-08-07
山东益源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the introduction of cationic polyacrylamide, the free monomer has neurotoxicity, and it is easy to cause secondary pollution
[0010] The Chinese patent "Preparation Method and Application of an Inorganic-Organic Composite Sludge Conditioner" (publication number CN109081552A) proposes to treat with NaCl first, and then compound with chitosan (CTS)-polymeric ferric chloride (PFC) A new method of conditioner + sludge residue coagulant to jointly condition sludge, and a specific polysaccharide (CTS)-polyferric chloride (PFC) composite conditioner preparation method, the method has excellent sludge dehydration effect, reaching For the purpose of deep dehydration, the dosage ratio of CTS-PFC is 20-50mg / L; the disadvantage is that a large amount of sodium chloride (0.1-0.5mol / L) needs to be added
[0012] (1) The composition of the conditioning agent is complex, the conditioning time is long, the conditioning process is cumbersome, and the time and labor costs are high
[0013] (2) The dosage of conditioner is large, the volume increase is obvious, the price is expensive, and the subsequent sludge transportation and disposal costs are increased
[0014] (3) Some sludge needs to be treated by adjusting pH or heating, which consumes a lot of energy and is easy to cause equipment corrosion
[0015] (4) Some use CPAM, which is difficult to degrade, and the free acrylamide monomer has neurotoxicity, which is easy to cause secondary pollution
[0016] (5) Catalysts and initiators need to be added, with high cost and large sludge increment
[0017] (6) The obtained liquid sludge conditioner has a high freezing point and is not suitable for storage and use in winter in Northwest and Northeast regions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The first embodiment of a kind of antifreeze type sludge deep dehydration conditioner designed by the patent of the present invention, in this embodiment, the preparation method of antifreeze type sludge deep dehydration conditioner is, under mechanical stirring, mix 2kg cationic guar Dissolve the gum polymer in 99.6L of 0.5% acetic acid, stir to dissolve it to obtain 100L of cationic guar gum polymer acetic acid solution with a content of 20g / L, add it to 10kg of polyferric sulfate, and keep stirring at 40°C for 2h to obtain cationic Guar gum-polymerized ferric sulfate polymer; slowly add cationic guar gum-polymerized ferric sulfate polymer into 700kg of polydimethyldiallyl ammonium chloride under mechanical stirring, and then add 200kg of ethylene disulfide Alcohol, heat preservation and stirring at 50°C for 1.2h, after the reaction is completed, cool to room temperature to obtain antifreeze type sludge deep dehydration conditioner, the freezing point of which is -30°C...

Embodiment 2

[0040] The second embodiment of a frost-resistant sludge deep dehydration conditioner designed by the patent of the present invention. In this embodiment, the preparation method of the freeze-resistant sludge deep dehydration conditioner is to mix 1 kg of cationic guar under mechanical stirring Gum polymer was dissolved in 49.8L of 0.5% acetic acid, stirred to dissolve to obtain 50L of cationic guar gum polymer acetic acid solution with a content of 20g / L, added to 5kg of polyferric sulfate, and stirred at 50°C for 1.5h to obtain Cationic guar gum-polymerized ferric sulfate polymer; under mechanical stirring, slowly add cationic guar gum-polymerized ferric sulfate polymer into 600kg of polydimethyldiallyl ammonium chloride, and then add 100kg of ethyl Diol, heat-preserved and stirred at 50°C for 1 hour, after the reaction was completed, cooled to room temperature to obtain a frost-resistant sludge deep dehydration conditioner, the freezing point of which was -20°C.

[0041] In...

Embodiment 3

[0044] The third embodiment of a kind of antifreeze type sludge deep dehydration conditioner designed by the patent of the present invention, in this embodiment, the preparation method of antifreeze type sludge deep dehydration conditioner is, under mechanical stirring, 5kg cationic guar Gum polymer was dissolved in 248L of 1% acetic acid, stirred to dissolve to obtain 250L of cationic guar gum polymer acetic acid solution with a content of 20g / L, added to 25kg of polyferric sulfate, and stirred at 60°C for 2 hours to obtain cationic guar gum - Polymerized ferric sulfate polymer; under mechanical stirring, cationic guar gum-polymerized ferric sulfate polymer is slowly added in 800kg polydimethyldiallyl ammonium chloride, and then 200kg ethylene glycol is added after the addition is completed. Stir at 50°C for 1.5 hours. After the reaction is complete, cool to room temperature to obtain a frost-resistant sludge deep dehydration conditioner with a freezing point of -26°C.

[004...

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Abstract

The invention relates to an anti-freezing sludge deep dehydration conditioner as well as preparation and application methods thereof, and belongs to the technical field of sludge treatment. The anti-freezing sludge deep dehydration conditioner is prepared from the following components in parts by mass through reaction: 600 to 800 parts of polydimethyldiallyl ammonium chloride, 100 to 200 parts ofethylene glycol, 1 to 5 parts of a cationic guar gum polymer and 5 to 25 parts of polyferric sulfate. After sludge is conditioned by the anti-freezing sludge deep dehydration conditioner, the dehydration performance is obviously improved, and the water content of a filter cake can be reduced to 50-60% from 95-99.9%. The anti-freezing sludge deep dehydration conditioner has the advantages of low freezing point, convenience in transportation, storage and use, high conditioning speed, high sludge dehydration rate, less increment of sludge generated by the conditioner, simplicity in operation, high sludge volume reduction rate and the like, so that the anti-freezing sludge deep dehydration conditioner can be widely applied to sludge conditioning and enhanced deep dehydration.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a frost-resistant sludge deep dehydration conditioner and its preparation and application methods. Background technique [0002] Sludge is a kind of viscous substance produced in the process of sewage treatment. It is mainly composed of aerobic and anaerobic microorganisms. A complex mixture of organic matter, metals, germs, insect eggs, colloids, etc. The sludge discharged from the sewage treatment plant is generally a loose, colloidal paste with a water content of 95%-99%, with a light specific gravity (less than or equal to 1g / cm 3 ), bulky (dozens of times the volume of solids contained in it), strong thixotropy (not easy to dehydrate), and has the physical and chemical characteristics of easy corruption and odor, so it is very unfavorable for handling and transportation. It is estimated that by 2020, the amount of dry sludge produced in my country will be 8.4×10 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/147
CPCC02F11/147
Inventor 张永顺黄现统韦芳汤爱华李艳艳曹洪涛陈落远种芬芬潘迪杨帆董亚立
Owner 山东益源环保科技有限公司
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