CN102633338A

CN102633338A - PVA (polyvinyl alcohol) desizing wastewater treating agent and preparation method thereof

Info

Publication number: CN102633338A
Application number: CN2012101299223A
Authority: CN
Inventors: 翁林兴
Original assignee: JIANGSU SHUANGJING PURIFICATION TECHNOLOGY Co Ltd
Current assignee: JIANGSU SHUANGJING PURIFICATION TECHNOLOGY Co Ltd
Priority date: 2012-04-28
Filing date: 2012-04-28
Publication date: 2012-08-15

Abstract

The invention relates to a sewage treating agent, and specifically relates to a treating agent for removing PVA (polyvinyl alcohols) in wastewater. The treating agent disclosed by the invention is suitable for the treatment on grey-fabric desizing wastewater, and belongs to the technical field of sewage treatment. The treating agent is prepared through the following steps of: adding polyaluminum chloride, sodium silicate and de-acetoxylation chitin into a reactor, and stirring the substances at the temperature of 15-25 DEG C so as to dissolve the substances; adding octadecyl trimethyl ammonium bromide, heating, and continuing stirring; when material foams increase and are sticky, adding boric acid and magnesium sulfate heptahydrate and stirring; then stopping stirring, and standing; and adding silica and aluminum oxide, heating, and continuing stirring; and finally, carrying out dehydration by using a centrifugal machine, carrying out drying treatment by using an oven, grinding and crushing by using a grinder, and sieving by using a 120-180-mesh sieve, thereby obtaining a PVA desizing wastewater treating agent product. Because the treating agent disclosed by the invention contains electropositive multinuclear coordination matters such as polyaluminum chloride, aluminum oxide, magnesium sulfate heptahydrate, octadecyl trimethyl ammonium bromide and the like, the treating agent can achieve electric neutralization and destabilization effects on colloidal particles in wastewater.

Description

PVA desized wastewater treatment agent and preparation method thereof

Technical field

The present invention relates to a kind of sewage-treating agent, is the treatment agent that is used for removing waste water PVA specifically.Be applicable to the processing of fabric grey cloth desized wastewater, belong to technical field of sewage.

Background technology

In textile industry,, before it is made into grey cloth, mostly carried out processing with the PVA slurry for increasing through line strength, preventing broken string.And before piece dyeing finishing or stamp, must handle through destarch again the PVA slurry on it is removed.After the destarch processing, the PVA slurry breaks away from grey cloth and gets in the desized wastewater.Because PVA slurry biodegradability is relatively poor, its BOD ₅/ COD _CRValue is merely 0.1, and the waste water that has the PVA slurry is directly discharged, and pollutes the environment.

Summary of the invention

The objective of the invention is to overcome above-mentioned weak point, a kind of PVA desized wastewater treatment agent is provided, this treatment agent, good to the PVA removal effect in the waste water, can alleviate the pollution of PVA greatly to environment.

Technical scheme of the present invention: a kind of PVA desized wastewater treatment agent, meter is as follows by weight:

1 ~ 2 part in calcium hydroxide; 20 ~ 40 parts of Poly aluminum Chloride (PAC)s; 5 ~ 25 parts of silica 1s; 20 ~ 30 parts of water glass; 5 ~ 10 parts of aluminium sesquioxides; 0.5 ~ 2 part of MAGNESIUM SULPHATE HEPTAHYDRATE 99.5; 0.5 ~ 1 part of boric acid; 0.1 ~ 0.3 part of octadecyl trimethylammonium bromide; 0.1 ~ 0.3 part of chitin.

The preparation method of said PVA desized wastewater treatment agent is characterized in that step is following by weight: get 20 ~ 40 parts of Poly aluminum Chloride (PAC)s, 20 ~ 30 parts of water glass, 0.1 ~ 0.3 part of adding of chitin reactor drum, stir 10 ~ 20min down at 15 ~ 25 ℃, make its dissolving; Add 0.1 ~ 0.3 part of octadecyl trimethylammonium bromide, be warming up to 30 ~ 70 ℃, continue to stir 20 ~ 40min; When the material foam increases and be thick; Add 0.5 ~ 1 part of boric acid, 0.5 ~ 2 part of MAGNESIUM SULPHATE HEPTAHYDRATE 99.5 again, behind stirring 50 ~ 70min, stop to stir and static 120 ~ 720min; Add 5 ~ 25 parts of silica 1s, 5 ~ 10 parts of aluminium sesquioxides; Be warming up to 35 ~ 45 ℃, continue to stir 50 ~ 70min, use whizzer 1800 ~ 2200 r/min dehydration 10 ~ 15min, 50 ~ 70 ℃ of oven dryings to handle 28 ~ 32min at last; Add calcium hydroxide and regulate pH to 7 ~ 8; Grind through kibbler,, promptly get product P VA desized wastewater treatment agent with 120 ~ 180 purpose sieve.

The present invention has following advantage: owing to contain the multinuclear coordination thing of positively chargeds such as Poly aluminum Chloride (PAC), aluminium sesquioxide, MAGNESIUM SULPHATE HEPTAHYDRATE 99.5 and octadecyl trimethylammonium bromide in the treatment agent of the present invention, can produce charge neutrality, take off steady effect the colloidal solid in the waste water; Again because inner monoclinic lattice and the uneven formed micropore of internal charge of silicon based compounds such as silicon-dioxide and water glass has very strong adsorption to the organism in the waste water; Borate compounds boric acid with take off good sequestrant and the gelifying agent that Chitin 50 then is PVA.Therefore, earlier PVA desized wastewater treatment agent is made into strong solution, pours into again and stir flocculation sediment in the sewage; Also can directly drop in the sewage, stir flocculation sediment, under the acting in conjunction of above-mentioned substance at a certain amount of desized wastewater treatment agent pulvis; PVA in the waste water through chelating, charge neutrality, take off steady, adsorption bridging, the adhesion volume is swept; Can produce good flocculation, deposition, PVA removal effect good (through on probation, the removal effect of PVA reaches more than 75%); Reduced the PVA content in the desized wastewater, reduced the pollution of PVA environment.

Embodiment

Embodiment 1

Choose 20 parts Poly aluminum Chloride (PAC), 20 parts silicon-dioxide, 30 parts water glass, 5 parts aluminium sesquioxide, 1 part MAGNESIUM SULPHATE HEPTAHYDRATE 99.5,1 part boric acid, 0.1 part octadecyl trimethylammonium bromide, chitin and 1 part of calcium hydroxide of 0.2 part.

Earlier Poly aluminum Chloride (PAC), water glass, chitin are put into reactor drum, under 15 ~ 25 ℃ temperature, stirred 15 minutes, make its dissolving; Afterwards, add the octadecyl trimethylammonium bromide, and be warming up to 30 ~ 70 ℃, continue to stir 30 minutes, when the material foam increases and be thick, add boric acid, MAGNESIUM SULPHATE HEPTAHYDRATE 99.5 again, continue to stir after 60 minutes, stop to stir and static 360 minutes; Then, add silicon-dioxide, aluminium sesquioxide, and be warming up to 40 ℃, continue to stir 60 minutes; At last, handle, add calcium hydroxide and regulate pH to 7 with dewater 15min, 60 ℃ oven drying of whizzer 1800r/min successively, kibbler is pulverized grinding, 120 ~ 180 purpose sieves sieve, and promptly gets product P VA desized wastewater treatment agent.

Embodiment 2

Choose 30 parts Poly aluminum Chloride (PAC), 25 parts silicon-dioxide, 20 parts water glass, 8 parts aluminium sesquioxide, 1.5 parts MAGNESIUM SULPHATE HEPTAHYDRATE 99.5,0.5 part boric acid, 0.3 part octadecyl trimethylammonium bromide, chitin and 2 parts of calcium hydroxides of 0.1 part.

Earlier Poly aluminum Chloride (PAC), water glass, chitin are put into reactor drum, under 15 ~ 25 ℃ temperature, stirred 10 minutes, make its dissolving; Afterwards, add the octadecyl trimethylammonium bromide, and be warming up to 30 ~ 70 ℃, continue to stir 20 minutes, when the material foam increases and be thick, add boric acid, MAGNESIUM SULPHATE HEPTAHYDRATE 99.5 again, continue to stir after 50 minutes, stop to stir and static 120 minutes; Then, add silicon-dioxide, aluminium sesquioxide, and be warming up to 40 ℃, continue to stir 60 minutes; At last, handle, add calcium hydroxide and regulate pH to 8 with dewater 10min, 60 ℃ oven drying of whizzer 2200 r/min successively, kibbler is pulverized grinding, 120 ~ 180 purpose sieves sieve, and processes product P VA desized wastewater treatment agent.

Embodiment 3

Choose 39 parts Poly aluminum Chloride (PAC), 16 parts silicon-dioxide, 25 parts water glass, 10 parts aluminium sesquioxide, 1.9 parts MAGNESIUM SULPHATE HEPTAHYDRATE 99.5,0.8 part boric acid, 0.2 part octadecyl trimethylammonium bromide, chitin and 1 part of calcium hydroxide of 0.3 part.

Earlier with Poly aluminum Chloride (PAC), water glass, take off Chitin 50 and put into reactor drum, under 15 ~ 25 ℃ temperature, stirred 10 minutes, make its dissolving; Afterwards, add the octadecyl trimethylammonium bromide, and be warming up to 30 ~ 70 ℃, continue to stir 20 minutes, when the material foam increases and be thick, add boric acid, MAGNESIUM SULPHATE HEPTAHYDRATE 99.5 again, continue to stir after 50 minutes, stop to stir and static 720 minutes; Then, add silicon-dioxide, aluminium sesquioxide, and be warming up to 40 ℃, continue to stir 50 minutes; At last, handle, add calcium hydroxide with whizzer 2000r/min dehydration 13min, 50 ℃ oven drying successively and regulate pH to 7.5, kibbler is pulverized and is ground, 120 ~ 180 purpose sieve, processes PVA desized wastewater treatment agent of the present invention.

In the foregoing description, said PVA is meant Z 150PH.

Claims

1. PVA desized wastewater treatment agent is characterized in that counting by weight as follows:

2. the preparation method of the said PVA desized wastewater of claim 1 treatment agent; It is characterized in that step is following by weight: get 20 ~ 40 parts of Poly aluminum Chloride (PAC)s, 20 ~ 30 parts of water glass, 0.1 ~ 0.3 part of adding of chitin reactor drum; Stir 10 ~ 20min down at 15 ~ 25 ℃, make its dissolving; Add 0.1 ~ 0.3 part of octadecyl trimethylammonium bromide, be warming up to 30 ~ 70 ℃, continue to stir 20 ~ 40min; When the material foam increases and be thick; Add 0.5 ~ 1 part of boric acid, 0.5 ~ 2 part of MAGNESIUM SULPHATE HEPTAHYDRATE 99.5 again, behind stirring 50 ~ 70min, stop to stir and static 120 ~ 720min; Add 5 ~ 25 parts of silica 1s, 5 ~ 10 parts of aluminium sesquioxides; Be warming up to 35 ~ 45 ℃, continue to stir 50 ~ 70min, use whizzer 1800 ~ 2200 r/min dehydration 10 ~ 15min, 50 ~ 70 ℃ of oven dryings to handle 28 ~ 32min at last; Add calcium hydroxide and regulate pH to 7 ~ 8; Grind through kibbler,, promptly get product P VA desized wastewater treatment agent with 120 ~ 180 purpose sieve.