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A kind of preparation method of sludge dewatering agent

A technology of sludge dehydrating agent and deionized water, which is applied in the direction of water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., and can solve problems such as odor, long dehydration time, and low dehydration effect , to achieve the effect of increasing the flocculation effect, increasing the effective content, and enhancing the interaction

Active Publication Date: 2020-12-22
东莞市顶盛环保科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problems that the dehydration time of the current sludge dewatering agent is long, a large amount of gas with odor is produced in the process, and the dehydration effect is low, a preparation method of the sludge dehydrating agent is provided

Method used

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  • A kind of preparation method of sludge dewatering agent

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preparation example Construction

[0016] A preparation method of sludge dewatering agent, the preparation method comprises the steps of:

[0017] (1) Take magnesium nitrate according to the mass ratio of 1~3:1~4:5~7, add aluminum nitrate and deionized water and stir for 20~30min to get the stirred mixture, take sodium carbonate 5~7:2~4:10~ 13 Add sodium hydroxide and deionized water and mix to obtain a stirring mixture a. Take the stirring mixture a and add it to the stirring mixture at a mass ratio of 5:3, add ammonia water with a concentration of 0.5mol / L to adjust the pH to 9~9.5, and stir and mix for 5 ~8min, aged at 60~65°C for 15~18h, dialyzed, concentrated, dried to obtain a dried product;

[0018] (2) Take acrylamide according to the mass ratio of 1~3:2~4:4~7, add dry matter and distilled water to mix, and then add acryloyloxyethyl dimethyl benzyl ammonium chloride with 10~20% of the mass of acrylamide , Stir and mix at 30~40°C for 30~40min to obtain a mixture, take the mixture and add urea at a mass ...

Embodiment 1

[0022] A preparation method of sludge dewatering agent, the preparation method comprises the steps of:

[0023] (1) Take magnesium nitrate and add aluminum nitrate and deionized water according to the mass ratio of 1:1:5 and stir and mix for 20 minutes to obtain a stirred mixture; take sodium carbonate 5:2:10 and add sodium hydroxide and deionized water to mix to obtain a stirred mixture a. Take the stirred mixture a and add it to the stirred mixture at a mass ratio of 5:3, add ammonia water with a concentration of 0.5mol / L to adjust the pH to 9, stir and mix for 5 minutes, age at 60°C for 15 hours, dialyze and concentrate, and dry to obtain a dry product ;

[0024] (2) Take acrylamide and add dry matter and distilled water in a mass ratio of 1:2:4 to mix, then add acryloyloxyethyl dimethyl benzyl ammonium chloride with 10% mass of acrylamide, stir and mix at 30°C for 30 minutes, To obtain the mixture, take the mixture and add urea at a mass ratio of 80:1, adjust the pH to 4,...

Embodiment 2

[0028] A preparation method of sludge dewatering agent, the preparation method comprises the steps of:

[0029] (1) Take magnesium nitrate and add aluminum nitrate and deionized water according to the mass ratio of 3:4:7 and stir and mix for 30 minutes to obtain a stirred mixture; take sodium carbonate 7:4:13 and add sodium hydroxide and deionized water to mix to obtain a stirred mixture a. Take the stirred mixture a and add it to the stirred mixture according to the mass ratio of 5:3, add ammonia water with a concentration of 0.5mol / L to adjust the pH to 9.5, stir and mix for 8 minutes, age at 65°C for 18 hours, dialyze and concentrate, and dry to obtain a dry product ;

[0030] (2) Take acrylamide and add dry matter and distilled water in a mass ratio of 3:4:7 to mix, then add acryloyloxyethyl dimethyl benzyl ammonium chloride with 20% mass of acrylamide, stir and mix at 40°C for 40 minutes, To obtain the mixture, take the mixture and add urea according to the mass ratio of...

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Abstract

The invention discloses a preparation method of a sludge dehydrating agent and belongs to the field of environmental protection. According to the preparation method, zero-valent iron nanoparticles areprepared from ferric chloride hexahydrate and sodium borohydride, sulfuric acid is added, an oxidation reaction of converting zero-valent iron in the zero-valent iron nanoparticles into ferrous ironis realized by a two-electron transfer reaction, oxygen molecules are activated into hydrogen peroxide, electrons are captured by electrophilic oxygen molecules adsorbed on the surface when transferred to a nuclear shell of iron oxide, the sludge is preoxidized and can be degraded into substances with lower molecular weight, therefore, release of bound water is facilitated and conversion of the bound water into free water is facilitated, water release is accelerated, meanwhile, hydroxyl radicals are produced for decomposing the sludge, the dehydrating process is accelerated, and the dehydrating time is shortened. The problem that an existing sludge dehydrating agent is long in dehydrating time, produces a large amount of odorous gas in the process and is poor in dehydrating effect is solved.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a preparation method of a sludge dewatering agent. Background technique [0002] Sludge is the final product of sewage treatment, with high concentration of pollutants, complex components, high organic matter content, and strong hydrophilicity. It is mainly composed of aerobic and anaerobic microorganisms, and it is also mixed with mud sand, fibers, animal and plant residues contained in raw sewage, and organic matter, metals, germs, insect eggs, colloids and other complex substances adsorbed on them. a mixture of. For sewage treatment plants in large cities, due to the large amount of industrial wastewater discharged into the system, the heavy metal content in sewage sludge is relatively high, and the copper and zinc content are often close to or exceed the acceptance standards for sludge as agricultural compost. The sludge discharged from the sewage treatme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/148C08F220/56C08F220/34
CPCC02F11/14C08F220/56C08F220/34
Inventor 胡次兵庄文琴刘红妹
Owner 东莞市顶盛环保科技有限公司
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