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Wastewater flocculant and preparation method therefor

A waste water flocculant and initiator technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of complicated treatment steps, fragile flocs, damage to the environment, etc., achieve excellent flocculation performance, and the preparation method is simple and easy , low cost effect

Inactive Publication Date: 2015-11-25
ANHUI JIANGWEI PRECISION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing flocculants mainly include inorganic flocculants and organic flocculants. Among them, the inorganic flocculants are greatly affected by the change of pH value, the flocs formed are fragile, and the treated water contains a relatively high concentration of metal ions. Complicates the processing steps; the supernatant after flocculation with organic flocculants is poor in clarity, and organic flocculants are not easy to degrade and damage the environment

Method used

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preparation example Construction

[0014] The present invention provides a kind of preparation method of waste water flocculant, and this preparation method comprises:

[0015] (1) mixing attapulgite and blast furnace slag powder, calcining and pulverizing to obtain mixed powder M1;

[0016] (2) chitosan, acrylamide, dialkyl diallyl ammonium bromide, epichlorohydrin, triethylamine, trimethyl ethyl isopropenyl ammonium chloride, acrylic acid and initiator in acidic solution Mix in to obtain mixed solution M2;

[0017] (3) The mixed solution M2 is polymerized under the protection of an inert gas to prepare the mixed solution M3;

[0018] (4) mixing the mixed powder M1 and the mixed solution M3 to prepare a mixture M4;

[0019] (5) The mixture M4 is frozen, dried and granulated to prepare a wastewater flocculant.

[0020] In the above preparation method, the amount of attapulgite and blast furnace slag powder can be selected in a wide range. In order to make the prepared wastewater flocculant have a more excell...

preparation example 1

[0034] Preparation of chitosan:

[0035] (1) Soak crab shells in 8% by weight sodium hydroxide solution (1:4 by weight) at 90°C for 5 hours, adjust the pH value to 7, and filter to obtain product N1;

[0036] (2) Soak the product N1 in 15% by weight hydrochloric acid solution (1:3 by weight) at 70°C for 10 hours, adjust the pH value to 5 with distilled water, and filter to obtain the product N2;

[0037] (3) After soaking the product N2 in 0.5% by weight of potassium permanganate solution (weight ratio is 1:3) for 30min, add 1% sodium bisulfite (the weight ratio of N2 and sodium bisulfite is 3 : 1) decolorize for 30min, adjust the pH value to 7, and filter to obtain product N3;

[0038] (4) Soak the product N3 in 50% by weight sodium hydroxide solution at 80°C for 12 hours, adjust the pH value to 7, and dry to obtain chitosan.

Embodiment 1

[0040] (1) Mix attapulgite and blast furnace slag powder (weight ratio: 100:15), calcinate at 500°C for 2 hours and pulverize to obtain mixed powder M1;

[0041] (2) Chitosan, acrylamide, dialkyl diallyl ammonium bromide, epichlorohydrin, triethylamine, trimethyl ethyl isopropenyl ammonium chloride, acrylic acid and ammonium persulfate in hydrochloric acid solution (mass ratio 100:55:35:30:15:12:15:11:250) to obtain a mixed solution M2,

[0042] (3) At 40°C, the mixed solution M2 was polymerized for 5 hours under the protection of argon to prepare the mixed solution M3;

[0043] (4) Mix the mixed powder M1 and the mixed solution M3 (mass ratio is 100:250) to prepare the mixture M4;

[0044] (5) The mixture M4 was frozen at -10° C. for 2 hours, dried at 10 Pa for 2 hours, and granulated to prepare wastewater flocculant A1.

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Abstract

The invention discloses a wastewater flocculant and a preparation method therefor. The preparation method comprises the steps: (1) mixing, calcining and crushing attapulgite and blast furnace slag powder so as to prepare mixed powder M1; (2) mixing chitosan, acrylamide, dialkyl diallyl ammonium bromide, epoxy chloropropane, triethylamine, trimethyl ethyl isopropenyl ammonium chloride, acrylic acid and an initiator in an acidic solution so as to obtain a mixed solution M2; (3) carrying out polymerization reaction on the mixed solution M2 under the protection of inert gas so as to prepare a mixed solution M3; (4) mixing the mixed powder M1 and the mixed solution M3 so as to prepare a mixture M4; and (5) freezing, drying and granulating the mixture M4, thereby preparing the wastewater flocculant. The wastewater flocculant prepared by the method is excellent in flocculation effect and light in pollution.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a wastewater flocculant and a preparation method thereof. Background technique [0002] Flocculation is an important method of wastewater treatment. It is used to remove fine suspended solids and colloids in wastewater. The common flocculation process is to add flocculants to wastewater, so that suspended solids and colloids in wastewater can be removed under the action of added flocculants. Contact each other, collide and destabilize and condense into aggregates of a certain particle size. The existing flocculants mainly include inorganic flocculants and organic flocculants. Among them, the inorganic flocculants are greatly affected by the change of pH value, the flocs formed are fragile, and the treated water contains a relatively high concentration of metal ions. Complicates the processing steps; the supernatant after flocculation with organic flocculants is poor in clarit...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 沈福建鲍启兵褚诗泉纪沿海
Owner ANHUI JIANGWEI PRECISION IND
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