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Water-treating agent for desizing sewage

A technology for desizing wastewater and polyvinyl alcohol, applied in the direction of adsorption water/sewage treatment, flocculation/sedimentation water/sewage treatment, chemical instruments and methods, etc., can solve the problem of poor biodegradability of polyvinyl alcohol slurry, environmental pollution, etc. problem, to achieve the effect of reducing polyvinyl alcohol content, reducing pollution, and good removal effect

Inactive Publication Date: 2005-02-16
翁林兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor biodegradability of polyvinyl alcohol slurry, its BOD 5 / COD CR The value is only 0.1, and the wastewater with polyvinyl alcohol slurry is discharged directly, which will pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Select 20 parts of polyaluminum chloride, 20 parts of silicon dioxide, 30 parts of sodium silicate, 5 parts of aluminum oxide, 1 part of magnesium sulfate heptahydrate, 1 part of boric acid, 0.1 part of octadecane Trimethylammonium bromide and 0.2 parts of linear β-(1→4)-2-acetamido-2-deoxy-D-glucan.

[0018] First put polyaluminum chloride, sodium silicate, and straight-chain β-(1→4)-2-acetamido-2-deoxy-D-glucan into the reactor, at a temperature of 15-25°C Stir for 15 minutes to dissolve it; then, add octadecyltrimethylammonium bromide, and raise the temperature to 30-70°C, and continue stirring for 30 minutes. When the material foams and becomes viscous, add boric acid , Magnesium sulfate heptahydrate, after continuing to stir for 60 minutes, stop stirring and stand still for 120 to 720 minutes; then, add silicon dioxide and aluminum oxide, and raise the temperature to 40°C, and continue stirring for 60 minutes; finally, use a centrifuge to Dehydration, drying in an...

Embodiment 2

[0020] Select 30 parts of polyaluminum chloride, 25 parts of silicon dioxide, 20 parts of sodium silicate, 8 parts of aluminum oxide, 1.5 parts of magnesium sulfate heptahydrate, 0.5 parts of boric acid, 0.3 parts of octadecane trimethylammonium bromide and 0.1 part of linear β-(1→4)-2-acetamido-2-deoxy-D-glucan.

[0021] First put polyaluminum chloride, sodium silicate, and straight-chain β-(1→4)-2-acetamido-2-deoxy-D-glucan into the reactor, at a temperature of 15-25°C Stir for 15 minutes to dissolve it; then, add octadecyltrimethylammonium bromide, and raise the temperature to 30-70°C, and continue stirring for 30 minutes. When the material foams and becomes viscous, add boric acid , Magnesium sulfate heptahydrate, after continuing to stir for 60 minutes, stop stirring and stand still for 120 to 720 minutes; then, add silicon dioxide and aluminum oxide, and raise the temperature to 40°C, and continue stirring for 60 minutes; finally, use a centrifuge to Dehydration, drying...

Embodiment 3

[0023] Select 39 parts of polyaluminum chloride, 16 parts of silicon dioxide, 25 parts of sodium silicate, 10 parts of aluminum oxide, 1.9 parts of magnesium sulfate heptahydrate, 0.8 parts of boric acid, 0.2 parts of octadecane trimethylammonium bromide and 0.3 parts of linear β-(1→4)-2-acetamido-2-deoxy-D-glucan.

[0024] First put polyaluminum chloride, sodium silicate, and straight-chain β-(1→4)-2-acetamido-2-deoxy-D-glucan into the reactor, at a temperature of 15-25°C Stir for 15 minutes to dissolve it; then, add octadecyltrimethylammonium bromide, and raise the temperature to 30-70°C, and continue stirring for 30 minutes. When the material foams and becomes viscous, add boric acid , Magnesium sulfate heptahydrate, after continuing to stir for 60 minutes, stop stirring and stand still for 120 to 720 minutes; then, add silicon dioxide and aluminum oxide, and raise the temperature to 40°C, and continue stirring for 60 minutes; finally, use a centrifuge to The polyvinyl alc...

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PUM

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Abstract

A water treating agent for the desizing sewage containing PVA is prepared from aluminium polychloride (20-40 Wt portions), SiO2 (15-25), sodium silicate (20-30), Al2O3 (5-10), bitter salt (0.5-2), boric acid (0.5-1), ammonium octadecyltrimethyl bromide (0.1-0.3) and deacetic chitin (0.1-0.3). Its advantage is high effect on removing PVA.

Description

technical field [0001] The invention relates to a sewage treatment agent. Specifically, it is a treatment agent for removing polyvinyl alcohol in wastewater. It is suitable for the treatment of gray fabric desizing wastewater. Background technique [0002] In the textile industry, in order to increase the warp strength and prevent thread breakage, it is mostly treated with polyvinyl alcohol slurry before it is woven into gray cloth. And before the gray cloth is dyed or printed, the polyvinyl alcohol size on it must be removed through desizing treatment. After the desizing treatment, the polyvinyl alcohol size is separated from the gray cloth and enters the desizing wastewater. Due to the poor biodegradability of polyvinyl alcohol slurry, its BOD 5 / COD CR The value is only 0.1, and the wastewater with polyvinyl alcohol slurry is discharged directly, which will pollute the environment. Contents of the invention [0003] The object of the present invention is to provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D21/01C02F1/28C02F1/52C02F1/54C02F1/56
Inventor 吴海根翁林兴
Owner 翁林兴
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