CN101974165B - Method for recovering PVA in waste water generated by water jet abrasive material - Google Patents
Method for recovering PVA in waste water generated by water jet abrasive material Download PDFInfo
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- CN101974165B CN101974165B CN2010105029046A CN201010502904A CN101974165B CN 101974165 B CN101974165 B CN 101974165B CN 2010105029046 A CN2010105029046 A CN 2010105029046A CN 201010502904 A CN201010502904 A CN 201010502904A CN 101974165 B CN101974165 B CN 101974165B
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- Prior art keywords
- waste water
- pva
- produces
- foam separation
- jet abrasive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002351 wastewater Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000003082 abrasive agent Substances 0.000 title abstract description 4
- 239000006260 foam Substances 0.000 claims abstract description 52
- 238000000926 separation method Methods 0.000 claims abstract description 43
- 238000011084 recovery Methods 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000007664 blowing Methods 0.000 claims description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 238000007667 floating Methods 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 9
- 239000010439 graphite Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000003760 magnetic stirring Methods 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 229920002689 polyvinyl acetate Polymers 0.000 abstract 4
- 239000011118 polyvinyl acetate Substances 0.000 abstract 4
- 239000003792 electrolyte Substances 0.000 abstract 3
- 238000005188 flotation Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The invention discloses a method for recovering PVA (polyvinyl acetate) in waste water generated by a water jet abrasive material. The method is simple and convenient with low cost, and the recovery rate can be over 80 percent. The method comprises the following steps of: A) initially recovering the waste water, which contains the PVA and is generated by the water jet abrasive material, by using a foam separation method; and B) recovering the waste water treated by the foam separation method by using an electro-flotation method: adding the waste water treated by the step A) into an electrolytic tank which is provided with a stirrer first, then adding electrolyte into the waste water, starting stirring, simultaneously adjusting the voltage in the electrolytic tank to be between 10 and 20 V, and collecting foam dross namely the PVA generated in the stirring process, wherein the stirring time is 120 to 240 minutes, and the addition of the electrolyte ensures that the concentration of the electrolyte in the waste water is between 0.05 and 0.1 mol/L.
Description
Technical field
The present invention relates to the recovery method of a kind of PVA, relate to the recovery method of PVA in the waste water that a kind of water jet abrasive produces specifically.
Background technology
In the water jet abrasive suitability for industrialized production preparation process, produced a large amount of organic wastewater, 1 ton of crude product abrasive material of general every production will produce 3 tons of factory effluents.This type waste water contains does not participate in a large number the pure and mild a small amount of unreacted polymerization body material of polyethylene of dispersing agent that reacts.If waste water is handled the back discharging, not only needs the high processing cost, and cause the waste of active substance.In the suitability for industrialized production of water jet abrasive, Z 150PH has neither part nor lot in polyreaction as dispersion agent, and after reaction finished, 60%-70%PVA was present in the waste water with dissolved state.If waste water is handled the back discharging, not only need consume a large amount of processing costs, and cause the waste of PVA resource in the waste water.Therefore, the PVA in the waste water being carried out the resource utilization recycling extremely is necessary.At present; The membrane separation technique and the method such as gel method of saltouing are mainly adopted in the concentrated recovery of PVA in the waste water; The membrane separation technique cost is higher; Though and the gel method organic efficiency of saltouing is higher, can produce the also unsuitable industrial applications of secondary pollution, therefore need to develop a kind of new recovery method to solve the problem that prior art exists.
Summary of the invention:
The objective of the invention is to solve the problems and shortcomings that exist in the prior art, the recovery method of PVA in the waste water that a kind of water jet abrasive produces is provided, the simple and convenient cost of this method is low, and the recovery can reach more than 80%.
Technical scheme of the present invention is following:
The recovery method of PVA in the waste water that water jet abrasive of the present invention produces, it may further comprise the steps:
A) with foamet the PVA waste water that contains that water jet abrasive produces is tentatively recycled: waste water is added the bottom be placed with in the foam separation post of glass core and make liquid level reach 60～80% of foam separation post height; Open air air-blowing inward from the foam separation column bottom; Foam separation is collected, when wastewater volume reduces 20～40%, stopped air-blowing;
B) with electric floating method the waste water of handling with foamet is recycled again: earlier in the electrolyzer of whisking appliance is installed, add steps A) waste water handled; Begin to stir after adding ionogen; Regulate voltage to the 10～20V in the electrolyzer simultaneously; Foam scum silica frost with generation in the whipping process is that PVA collects, and churning time is 120～240min, and electrolytical dosage makes the concentration of ionogen in waste water reach 0.05mol/L～0.1mol/L.
The recovery method of PVA in the waste water that water jet abrasive of the present invention produces, its further technical scheme are that anode and negative electrode all adopt Graphite Electrodes in the described electrolyzer, and the distance between anode and the negative electrode is controlled between 30～34mm.
The recovery method of PVA in the waste water that water jet abrasive of the present invention produces, its further technical scheme can also be that described ionogen is Na
2SO
4
The recovery method of PVA in the waste water that water jet abrasive of the present invention produces, its further technical scheme can also be that described whisking appliance is a magnetic stirring apparatus.
The recovery method of PVA in the waste water that water jet abrasive of the present invention produces, its further technical scheme can also be that the speed of described air air-blowing in the foam separation post is 0.02～0.1L/min, is preferably 0.02～0.04L/min, effect is best.
Compared with prior art the present invention has following beneficial effect:
The simple and convenient cost of recovery method of PVA is low in the waste water that water jet abrasive of the present invention produces, and can not produce secondary pollution, but the product direct reuse of recovery, and organic efficiency is also higher simultaneously reaches more than 80%.
Description of drawings
Fig. 1 is foam separation subtraction unit synoptic diagram among the present invention
Among Fig. 1: 1-air, 2-spinner-type flowmeter, 3-separator column, 4-glass core, 5-foam trap
Fig. 2 is electric floating method device synoptic diagram among the present invention
Among Fig. 2: the cloudy machine of 6-, 7-anode, 8-magnetic agitation rotor
Embodiment
A) with foamet the PVA waste water that contains that water jet abrasive produces is carried out rough handling: waste water is added the bottom be placed with in the foam separation post of glass core and make liquid level reach 70% of foam separation post height; Open air air-blowing inward from the foam separation column bottom; The speed of air-blowing is 0.1L/min; Foam separation is collected, when wastewater volume reduces 20%, stopped air-blowing;
B) with electric floating method the waste water of handling with foamet is handled: what add in the electrolyzer of magnetic stirring apparatus is installed that water jet abrasive produces contains PVA waste water 400mL, adds ionogen Na again
2SO
4After begin to stir; Make the concentration of ionogen in waste water reach 0.05mol/L; Regulating voltage in the electrolyzer simultaneously to 12V, is that PVA collects with the foam scum silica frost that produces in the whipping process, and churning time is 120min; Anode and negative electrode all adopt Graphite Electrodes in the wherein said electrolyzer, and the distance between anode and the negative electrode is controlled at 32mm.Through the detection computations PVA recovery is 60.8%.
A) with foamet the PVA waste water that contains that water jet abrasive produces is carried out rough handling: waste water is added the bottom be placed with in the foam separation post of glass core and make liquid level reach 80% of foam separation post height; Open air air-blowing inward from the foam separation column bottom; The speed of air-blowing is 0.06L/min; Foam separation is collected, when wastewater volume reduces 30%, stopped air-blowing;
B) with electric floating method the waste water of handling with foamet is handled: what add in the electrolyzer of magnetic stirring apparatus is installed that water jet abrasive produces contains PVA waste water 400mL, adds ionogen Na again
2SO
4After begin to stir; Make the concentration of ionogen in waste water reach 0.075mol/L; Regulating voltage in the electrolyzer simultaneously to 10V, is that PVA collects with the foam scum silica frost that produces in the whipping process, and churning time is 150min; Anode and negative electrode all adopt Graphite Electrodes in the wherein said electrolyzer, and the distance between anode and the negative electrode is controlled at 32mm.Through the detection computations PVA recovery is 63.2%.
A) with foamet the PVA waste water that contains that water jet abrasive produces is carried out rough handling: waste water is added the bottom be placed with in the foam separation post of glass core and make liquid level reach 70% of foam separation post height; Open air air-blowing inward from the foam separation column bottom; The speed of air-blowing is 0.02L/min; Foam separation is collected, when wastewater volume reduces 30%, stopped air-blowing;
B) with electric floating method the waste water of handling with foamet is handled: what add in the electrolyzer of magnetic stirring apparatus is installed that water jet abrasive produces contains PVA waste water 400mL, adds ionogen Na again
2SO
4After begin to stir; Make the concentration of ionogen in waste water reach 0.1mol/L; Regulating voltage in the electrolyzer simultaneously to 12V, is that PVA collects with the foam scum silica frost that produces in the whipping process, and churning time is 240min; Anode and negative electrode all adopt Graphite Electrodes in the wherein said electrolyzer, and the distance between anode and the negative electrode is controlled at 32mm.Through the detection computations PVA recovery is 72.3%.
Embodiment 4
A) with foamet the PVA waste water that contains that water jet abrasive produces is carried out rough handling: waste water is added the bottom be placed with in the foam separation post of glass core and make liquid level reach 60% of foam separation post height; Open air air-blowing inward from the foam separation column bottom; The speed of air-blowing is 0.02L/min; Foam separation is collected, when wastewater volume reduces 40%, stopped air-blowing;
B) with electric floating method the waste water of handling with foamet is handled: what add in the electrolyzer of magnetic stirring apparatus is installed that water jet abrasive produces contains PVA waste water 400mL, adds ionogen Na again
2SO
4After begin to stir; Make the concentration of ionogen in waste water reach 0.075mol/L; Regulating voltage in the electrolyzer simultaneously to 15V, is that PVA collects with the foam scum silica frost that produces in the whipping process, and churning time is 200min; Anode and negative electrode all adopt Graphite Electrodes in the wherein said electrolyzer, and the distance between anode and the negative electrode is controlled at 32mm.Through the detection computations PVA recovery is 70.1%.
A) with foamet the PVA waste water that contains that water jet abrasive produces is carried out rough handling: waste water is added the bottom be placed with in the foam separation post of glass core and make liquid level reach 70% of foam separation post height; Open air air-blowing inward from the foam separation column bottom; The speed of air-blowing is 0.02L/min; Foam separation is collected, when wastewater volume reduces 30%, stopped air-blowing;
B) with electric floating method the waste water of handling with foamet is handled: what add in the electrolyzer of magnetic stirring apparatus is installed that water jet abrasive produces contains PVA waste water 400mL, adds ionogen Na again
2SO
4After begin to stir; Make the concentration of ionogen in waste water reach 0.05mol/L; Regulating voltage in the electrolyzer simultaneously to 20V, is that PVA collects with the foam scum silica frost that produces in the whipping process, and churning time is 240min; Anode and negative electrode all adopt Graphite Electrodes in the wherein said electrolyzer, and the distance between anode and the negative electrode is controlled at 32mm.Through the detection computations PVA recovery is 76.5%.
A) with foamet the PVA waste water that contains that water jet abrasive produces is carried out rough handling: waste water is added the bottom be placed with in the foam separation post of glass core and make liquid level reach 70% of foam separation post height; Open air air-blowing inward from the foam separation column bottom; The speed of air-blowing is 0.02L/min; Foam separation is collected, when wastewater volume reduces 35%, stopped air-blowing;
B) with electric floating method the waste water of handling with foamet is handled: what add in the electrolyzer of magnetic stirring apparatus is installed that water jet abrasive produces contains PVA waste water 400mL, adds ionogen Na again
2SO
4After begin to stir; Make the concentration of ionogen in waste water reach 0.075mol/L; Regulating voltage in the electrolyzer simultaneously to 20V, is that PVA collects with the foam scum silica frost that produces in the whipping process, and churning time is 240min; Anode and negative electrode all adopt Graphite Electrodes in the wherein said electrolyzer, and the distance between anode and the negative electrode is controlled at 32mm.Through the detection computations PVA recovery is 81.4%.
A) with foamet the PVA waste water that contains that water jet abrasive produces is carried out rough handling: waste water is added the bottom be placed with in the foam separation post of glass core and make liquid level reach 80% of foam separation post height; Open air air-blowing inward from the foam separation column bottom; The speed of air-blowing is 0.04L/min; Foam separation is collected, when wastewater volume reduces 40%, stopped air-blowing;
B) with electric floating method the waste water of handling with foamet is handled: what add in the electrolyzer of magnetic stirring apparatus is installed that water jet abrasive produces contains PVA waste water 400mL, adds ionogen Na again
2SO
4After begin to stir; Make the concentration of ionogen in waste water reach 0.1mol/L; Regulating voltage in the electrolyzer simultaneously to 20V, is that PVA collects with the foam scum silica frost that produces in the whipping process, and churning time is 240min; Anode and negative electrode all adopt Graphite Electrodes in the wherein said electrolyzer, and the distance between anode and the negative electrode is controlled at 32mm.Reaching through the detection computations PVA recovery is 84.3%.
Claims (4)
1. the recovery method of PVA in the waste water that produces of a water jet abrasive is characterized in that may further comprise the steps:
A) with foamet the PVA waste water that contains that water jet abrasive produces is tentatively recycled: waste water is added the bottom be placed with in the foam separation post of glass core and make liquid level reach 60～75% of foam separation post height; Open air air-blowing inward from the foam separation column bottom; Foam separation is collected, when wastewater volume reduces 20～40%, stopped air-blowing;
B) with electric floating method the waste water of handling with foamet is recycled again: earlier in the electrolyzer of whisking appliance is installed, add steps A) waste water handled; Begin to stir after adding ionogen; Regulate voltage to the 10～20V in the electrolyzer simultaneously, the foam scum silica frost with generation in the whipping process is that PVA collects, and churning time is 120～240min; Electrolytical dosage makes the concentration of ionogen in waste water reach 0.05mol/L～0.1mol/L, and wherein said ionogen is Na
2SO
4
2. the recovery method of PVA in the waste water that water jet abrasive according to claim 1 produces is characterized in that anode and negative electrode all adopt Graphite Electrodes in the described electrolyzer, and the distance between anode and the negative electrode is controlled between 30～34mm.
3. the recovery method of PVA is characterized in that described whisking appliance is a magnetic stirring apparatus in the waste water that water jet abrasive according to claim 1 produces.
4. the recovery method of PVA in the waste water that water jet abrasive according to claim 1 produces, the speed that it is characterized in that the air-blowing in the foam separation post of described air is 0.02～0.1L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105029046A CN101974165B (en) | 2010-09-30 | 2010-09-30 | Method for recovering PVA in waste water generated by water jet abrasive material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105029046A CN101974165B (en) | 2010-09-30 | 2010-09-30 | Method for recovering PVA in waste water generated by water jet abrasive material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101974165A CN101974165A (en) | 2011-02-16 |
| CN101974165B true CN101974165B (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105029046A Expired - Fee Related CN101974165B (en) | 2010-09-30 | 2010-09-30 | Method for recovering PVA in waste water generated by water jet abrasive material |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102887577A (en) * | 2012-09-25 | 2013-01-23 | 江苏红旗印染机械有限公司 | System for recycling PVA (Polyvinyl Alcohol) slurry from printing and dyeing wastewater and desizing wastewater |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51133347A (en) * | 1975-05-16 | 1976-11-19 | Sando Iron Works Co Ltd | A process for utilizing waste water containing polyvinyl alcohol (pva) |
| CN100540481C (en) * | 2005-10-03 | 2009-09-16 | 刘德沛 | A kind of method for the treatment of polyvinyl alcohol waste water by catalytic oxidizing process |
| CN101148275B (en) * | 2007-07-26 | 2010-09-22 | 滨州市隆盛宏源化工科技有限公司 | PVC centrifugal mother liquor treatment reclaiming technique and device |
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| CN101974165A (en) | 2011-02-16 |
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