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Composite polymer sludge dewatering agent and preparation method thereof

A technology of sludge dehydrating agent and composite polymer, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc. It can solve the problems of uncontrollable molecular structure, less industrialized products, and poor solubility, so as to save preparation cost and increase Sedimentation, the effect of simplifying the dosing operation

Active Publication Date: 2015-08-05
浙江新海天生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the research and development of inorganic-organic polymer flocculation dehydrating agents are still in the experimental stage, and there are few industrial products, and there are problems such as single type, uncontrollable molecular structure, poor stability and poor solubility.

Method used

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  • Composite polymer sludge dewatering agent and preparation method thereof
  • Composite polymer sludge dewatering agent and preparation method thereof
  • Composite polymer sludge dewatering agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) 0.76kg methyl acrylate (industrial refined liquid, Jiangxi Changjiu Company, the same below) was made into 7.6kg aqueous solution and 0.08kg 2-acrylamido-2-methylpropanesulfonic acid (concentration Be 60% industrial refining solution, U.S. Lubrizol Company, the same below) is made into 0.48kg aqueous solution, 0.26kg acryloyloxyethyltrimethyl ammonium chloride (concentration is the industrial refining solution of 70%, Jiangsu Nantian Company, The same below) was made into 1.8kg aqueous solution. Add the above three aqueous solutions into an enamel reaction kettle with a stirrer and a heating jacket, adjust the pH to 4 with 1% mass fraction hydrochloric acid and sodium hydroxide, start stirring, and pass nitrogen to remove oxygen;

[0034] (2) Add respectively 0.0035kg ammonium persulfate, 0.003kg sodium bisulfite, 0.003kg azobisisobutylamidine hydrochloride (industrial refined crystallization, Guangzhou Chuangyuan Company, the same below), 0.002kg kg of EDTA-2Na, t...

Embodiment 2

[0039] (1) 0.73kg methyl methacrylate (industrial refining liquid) was made into 7.3kg aqueous solution, 0.13kg 2-acrylamido-2-methylpropanesulfonic acid (60% industrial refining liquid) with deionized water solution) was made into 0.8kg aqueous solution, and 0.22kg acryloyloxyethyltrimethylammonium chloride (concentration is 70% industrially refined solution) was made into 1.5kg aqueous solution. Add the above three aqueous solutions into an enamel reaction kettle with a stirrer and a heating jacket, adjust the pH to 3 with 1% hydrochloric acid and sodium hydroxide, start stirring, and pass nitrogen to remove oxygen;

[0040] (2) Add 0.004kg potassium persulfate, 0.002kg sodium sulfite, 0.005kg azobisimidazolinyl propane dihydrochloride, 0.004kg EDTA-2Na respectively to the solution of the reactor, and control the reaction temperature to be 30°C;

[0041] (3) When the reaction is carried out for 3 hours, add 0.1 kg of ferric sulfate, fully stir, continue to pass nitrogen gas fo...

Embodiment 3

[0043] (1) 0.68kg ethyl acrylate (industrial refined liquid) is made into 6.8kg aqueous solution respectively with deionized water, 0.14kg acrylic acid (concentration is the industrial refined solution of 60%) is made into 0.82kg aqueous solution, 0.33kg dimethyl dimethicone Allyltrimethylammonium chloride (concentration is 70% industrial refining solution) is made into 2.3kg aqueous solution. Add the above three aqueous solutions into an enamel reaction kettle with a stirrer and a heating jacket, adjust the pH to 5 with 1% hydrochloric acid and sodium hydroxide, start stirring, and pass nitrogen to remove oxygen;

[0044] (2) In the solution of reactor, add 0.004kg potassium persulfate respectively, 0.005kg sodium bisulfite, 0.004kg azobisisobutylamidine hydrochloride, add the EDTA-2Na of 0.004kg again, control reaction temperature to be 45 ℃, to promote chain initiation and chain growth reactions;

[0045] (3) When the reaction is carried out for 4 hours, add 0.2 kg of poly...

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Abstract

The present invention discloses a composite polymer sludge dewatering agent and a preparation method thereof. The preparation method comprises: (1) respectively preparing a non-ionic monomer, an anionic monomer and a cationic monomer into aqueous solutions with deionized water, mixing, adjusting the pH value to 2-6, introducing nitrogen, and stirring; (2) adding a persulfate initiator, a sulfite reducing agent, an azo initiator and EDTA-2Na to the mixed solution prepared in the step (1), controlling the reaction temperature at 25-50 DEG C, and triggering a chain initiation and chain extending reaction; and (3) after the reaction in the step (2) is performed for 2-4 h, adding an inorganic salt, completely stirring, continuously introducing nitrogen to react for 1-3 h, discharging the material, and sequentially carrying out drying, crushing and granulation on the obtained colloid so as to obtain the sludge dewatering agent. The sludge dewatering agent of the present invention has advantages of complex water body conditioning, low consumption, low cost, thick floc, no residual toxic-harmful monomer, low moisture content of the treated sludge, inorganic suspended solids, good treatment effect, and the like.

Description

technical field [0001] The invention relates to a sludge dewatering agent, in particular to an environment-friendly composite polymer sludge dewatering agent and a preparation method thereof. Background technique [0002] By the end of 2012, my country's urban sewage treatment rate reached 77.4%. During the "Twelfth Five-Year Plan" period, the Chinese government put forward the goal of 80% of the urban sewage treatment rate in 2015, including 85% in key cities and 70% in small and medium-sized cities. This will inevitably produce a large amount of sewage plant sludge, making sludge treatment an increasingly prominent important issue. [0003] In the sludge treatment process, the first thing to solve is the problem of sludge dehydration. The amphoteric organic polymer sludge dewatering agent has the characteristics of both anionic organic polymer flocculant and cationic organic polymer flocculant. Flocculation mainly forms coarse flocs by "bridging" suspended matter through...

Claims

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Application Information

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IPC IPC(8): C02F11/14C08F220/14C08F220/18C08F220/58C08F220/06C08F220/34C08F226/02C08F2/10
Inventor 程建华齐亮张鹏谢培镇陈杰烽谢明容
Owner 浙江新海天生物科技有限公司
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