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Papermaking sewage flocculant and preparation method thereof

A papermaking sewage and flocculant technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, processing wastewater treatment, etc., can solve the problems of high cost, secondary pollution, poor flocculation effect, etc., and achieve fast settlement speed and high improvement. The effect of excellent rate and coagulation performance

Inactive Publication Date: 2015-09-30
ZHANGJIAGANG SHANMU NEW MATERIAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing paper-making flocculants still have technical deficiencies such as poor flocculation effect, high cost, and secondary pollution after use

Method used

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  • Papermaking sewage flocculant and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0021] A kind of flocculant for papermaking sewage, the composition of the mass parts of the flocculant is as follows: 10 parts of modified chitosan, 5 parts of polyferric magnesium silicate, 5 parts of sodium carboxymethyl cellulose, 1 part of ferrate, 2 parts of raw gypsum parts, 12 parts of zeolite, 12 parts of activated carbon, 100 parts of distilled water; the ferrate is sodium ferrate.

[0022] Preferably, the modified chitosan is prepared by the following method: chitosan and glacial acetic acid are mixed to form chitosan acetic acid solution, then mixed with water-soluble polymer additive PS, and stirred in a constant temperature water bath at 60°C for 2 hours Finally, the desired modified chitosan is obtained; the molecular weight of the chitosan is 220,000.

[0023] Preferably, the pH value of the chitosan acetic acid solution is 4.5.

[0024] Preferably, the sodium ferrate is prepared by the following method: sodium peroxide and ferrous sulfate hydrate are heated a...

Embodiment 2

[0026] A papermaking wastewater flocculant, the mass parts of the flocculant are composed as follows: 15 parts of modified chitosan, 10 parts of polyferric magnesium silicate, 7 parts of sodium carboxymethyl cellulose, 6 parts of ferrate, 5 parts of raw gypsum parts, 13 parts of zeolite, 16 parts of activated carbon, 120 parts of distilled water, and the ferrate is sodium ferrate.

[0027] Preferably, the modified chitosan is prepared by the following method: chitosan and glacial acetic acid are mixed to form chitosan acetic acid solution, then mixed with water-soluble polymer additive PS, and stirred in a constant temperature water bath at 75°C for 1.5 After h, the desired modified chitosan was obtained.

[0028] Preferably, the chitosan has a molecular weight of 280,000.

[0029] Preferably, the pH value of the chitosan acetic acid solution is 5.

[0030] Preferably, the sodium ferrate is prepared by the following method: sodium peroxide and ferrous sulfate hydrate are hea...

Embodiment 3

[0032] A paper-making wastewater flocculant, the mass parts of the flocculant are composed as follows: 20 parts of modified chitosan, 15 parts of polyferric magnesium silicate, 8 parts of sodium carboxymethyl cellulose, 10 parts of ferrate, 8 parts of raw gypsum parts, 15 parts of zeolite, 20 parts of activated carbon, and 150 parts of distilled water; the ferrate is sodium ferrate.

[0033] Preferably, the modified chitosan is prepared by the following method: chitosan and glacial acetic acid are mixed to form chitosan acetic acid solution, then mixed with water-soluble polymer additive PS, and stirred in a constant temperature water bath at 80°C for 1 hour Finally, the desired modified chitosan is obtained.

[0034] Preferably, the chitosan has a molecular weight of 300,000.

[0035] Preferably, the pH value of the chitosan acetic acid solution is 5.5.

[0036] Preferably, the sodium ferrate is prepared by the following method: sodium peroxide and ferrous sulfate hydrate a...

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Abstract

The invention relates to the technical field of sewage treatment, particularly a papermaking sewage flocculant and a preparation method thereof. The flocculant is composed of the following components in parts by mass: 10-20 parts of modified chitosan, 5-15 parts of polyferric magnesium silicate, 5-8 parts of sodium carboxymethyl cellulose, 1-10 parts of ferrate, 2-8 parts of raw gypsum, 12-15 parts of zeolite, 12-20 parts of activated carbon and 100-150 parts of distilled water. The chitosan used in the papermaking sewage treatment flocculant has porous beads which have chelation actions on heavy metals so as to quickly flocculate and naturally precipitate suspended substances in the sewage, thereby enhancing the yield of the stock solution.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a papermaking sewage flocculant and a preparation method thereof. Background technique [0002] At present, the paper industry is one of the six major industrial pollution sources in the world, and the amount of wastewater it produces accounts for about 10% of the total domestic industrial wastewater. Papermaking wastewater is divided into pulping waste liquid, mid-stage water and paper machine white water according to its production process. The pulping waste liquid can be recycled through the conventional alkali recovery process; the white water of the paper machine can be directly reused in production after being treated by air flotation or multi-disk vacuum filtration; Contains lignin, hemicellulose, sugars, residual alkali, inorganic salts, volatile acids, organic chlorides, etc., with large emissions, high COD, large changes in Ph, high chroma, and mercaptan-like ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F103/28
Inventor 赵云龙徐丹徐凯徐再赵维达
Owner ZHANGJIAGANG SHANMU NEW MATERIAL TECH DEV
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