CN112919704A - Green treatment method of emulsion polymerization resin wastewater - Google Patents
Green treatment method of emulsion polymerization resin wastewater Download PDFInfo
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- CN112919704A CN112919704A CN202110104696.2A CN202110104696A CN112919704A CN 112919704 A CN112919704 A CN 112919704A CN 202110104696 A CN202110104696 A CN 202110104696A CN 112919704 A CN112919704 A CN 112919704A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/22—Treatment of water, waste water, or sewage by freezing
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/38—Polymers
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Abstract
The invention relates to the technical field of emulsion polymerization resin wastewater treatment methods, and provides a green treatment method of emulsion polymerization resin wastewater, which comprises the following steps: step one, collecting and storing wastewater; step two, concentration: automatically pumping the waste water in the storage tank into a concentration section; step three, treating the concentrated solution at low temperature: quantitatively pumping the concentrated solution into a low-temperature treatment pool; step four, solid-liquid separation: and after the wastewater in the low-temperature treatment tank is thawed, pumping the wastewater into a solid-liquid separation device. The invention overcomes the defects of the prior art, has reasonable design and compact structure, solves the problems of poor effect and high cost of the prior resin wastewater treatment technology, adopts the process of low-temperature vacuum evaporation or membrane filtration concentration, and can directly recycle the separated clear liquid after reaching the standard; the stability of an emulsion polymerization resin wastewater system is destroyed at low temperature, so that coagulation of the polymerization resin is realized, various kinds of wastewater can be conveniently treated, and the application range is wide.
Description
Technical Field
The invention relates to the technical field of emulsion polymerization resin wastewater treatment methods, in particular to an environment-friendly treatment method of emulsion polymerization resin wastewater.
Background
Water-soluble emulsion polymerization is an important synthetic resin production method, and is also a mainstream production process of synthetic resins such as ABS resin, polymerized acrylate, styrene-acrylic resin, acrylate-vinyl acetate copolymer and the like. In the production process of the emulsion polymerization resin and the use process of a client, the cleaning of equipment such as a reaction kettle, a pipeline, a container and the like is involved, and a large amount of waste water is generated, wherein the waste water contains high-concentration difficultly-degradable polymers, high-toxicity polymer monomers, emulsion with high dispersity and good stability and a great amount of oily substances. The CODcr of the wastewater is hundreds of thousands or even millions of ppm, and the B/C is lower than 0.1, so the treatment difficulty is very large.
Chinese patent (CN105712432A) proposes source emission reduction and tail end wastewater treatment, and adopts the processes of demulsification, flotation, coagulation, air flotation and biochemical treatment. The Chinese patent (CN109111031A) adopts the steps of flocculation, precipitation, air floatation, moving bed biomembrane reaction, terminal flocculation precipitation, terminal air floatation, Fenton oxidation reaction and the like, and the treatment effect is still not ideal in the actual use process and the cost is high.
Therefore, the invention provides the method for purifying the wastewater generated in the emulsion polymerization resin production, which has the advantages of stable operation, good treatment effect and lower cost.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a green treatment method of emulsion polymerization resin wastewater, which overcomes the defects of the prior art, has reasonable design and compact structure, solves the problems of poor effect and high cost of the prior resin wastewater treatment technology, and adopts the process of low-temperature vacuum evaporation or membrane filtration concentration, so that the separated clear liquid can directly reach the standard for recycling; the stability of an emulsion polymerization resin wastewater system is destroyed at low temperature, so that coagulation of the polymerization resin is realized, various kinds of wastewater can be conveniently treated, and the application range is wide.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a green treatment method of emulsion polymerization resin wastewater comprises the following steps:
step one, wastewater collection and storage: collecting waste water generated in the production and use processes of the emulsion polymerization resin, and storing the waste water in a waste water storage tank;
step two, concentration: automatically pumping the waste water in the storage tank into a concentration section, separating clear liquid in the concentration section for up-to-standard recycling, and separating concentrated liquid to enter a concentrated liquid storage tank;
step three, treating the concentrated solution at low temperature: quantitatively pumping the concentrated solution into a low-temperature treatment tank, destroying the stability of an emulsion polymerization resin wastewater system by adopting low temperature, and aggregating and settling the polymer resin after thawing;
step four, solid-liquid separation: and after the wastewater in the low-temperature treatment tank is thawed, pumping the wastewater into a solid-liquid separation device, wherein the separated solid waste is polymeric resin, and the separated liquid enters a wastewater storage tank.
Furthermore, the concentration process adopted in the concentration section in the second step is vacuum low-temperature evaporation or membrane filtration concentration, and the water removal rate is 60-95%.
Further, the solid-liquid separation equipment in the fourth step is one of a plate-and-frame filter press, a centrifugal machine, vacuum filtration equipment and a screw stacking machine.
Further, the temperature of the vacuum low-temperature evaporation is 25-40 ℃, and the pressure is 2000-20000 Pa.
Furthermore, the membrane material in the membrane filtration concentration is an inorganic membrane or an organic membrane, and the average pore diameter of the membrane is 0.1-1000 nm.
Furthermore, the low-temperature treatment temperature of the concentrated solution in the third step is required to be-50-0 ℃, and the low-temperature treatment time is 0-72 hours.
(III) advantageous effects
The embodiment of the invention provides a green treatment method of emulsion polymerization resin wastewater. The method has the following beneficial effects:
1. the method has good treatment effect on the wastewater generated in the production and use processes of the emulsion polymerization resin, and the wastewater has high purification degree and reaches the recycling standard.
2. The wastewater treatment process is simple, the automation degree is high, and the manual operation cost is reduced. No chemical agent is used in the wastewater treatment process, the cost is saved, and the method is green and environment-friendly and has no pollution to the environment.
3. The green treatment method for the emulsion polymerization resin wastewater solves the problems of difficult separation and difficult biodegradation of the emulsion polymerization resin wastewater, and realizes resource utilization of the emulsion polymerization resin wastewater.
4. Can treat waste water such as polymerized acrylate, styrene-acrylic resin, acrylate-vinyl acetate copolymer and the like, and has wide application range and good effect.
Drawings
FIG. 1 is a flow diagram of a wastewater treatment process according to the present invention;
FIG. 2 is a table showing the effects of treating various wastewaters in examples 1 to 3;
FIG. 3 is a comparison between before and after the purification of wastewater in example 1 of the present invention.
In the figure: no. 1 is a waste water stock solution, No. 2 is a concentrated solution, and No. 3 is a penetrating fluid.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
And (3) treating the waste water of the polymerized acrylic ester.
Referring to the attached figures 1-3, a green treatment method of emulsion polymerization resin wastewater comprises the following steps:
step one, wastewater collection and storage: collecting the reactor washing wastewater generated in the production process of the polymerized acrylic ester emulsion, and storing the reactor washing wastewater in a wastewater storage tank.
Step two, concentration: the raw waste water in the storage tank is automatically pumped into a membrane filtration and concentration section, the membrane material is made of inorganic ceramic materials, the average pore size is 2nm, 80% of penetrating fluid is separated out in the concentration section, the penetrating fluid reaches the standard for recycling in detection, 20% of concentrated solution is separated out and enters a concentrated solution storage tank, and a ceramic membrane filter element with the patent number of CN200510123058.6 is adopted in the membrane filtration and concentration section.
Step three, treating the concentrated solution at low temperature: quantitatively pumping the concentrated solution into a low-temperature treatment tank, freezing at-30 ℃ for 24h to destroy the stability of a polymerized acrylic ester wastewater system, and aggregating and settling polymerized acrylic ester after thawing.
Step four, solid-liquid separation: and (3) detecting the temperature of the wastewater in the low-temperature treatment tank to be 30 ℃, pumping the wastewater into a plate-and-frame filter pressing device, feeding the separated liquid into a wastewater storage tank, and treating the separated solid waste as hazardous waste.
Example 2
And treating styrene-acrylic resin wastewater.
A green treatment method of emulsion polymerization resin wastewater comprises the following steps:
step one, wastewater collection and storage: and collecting the washing wastewater of the reaction kettle generated in the production process of the styrene-acrylic resin, and storing the washing wastewater in a wastewater storage tank.
Step two, concentration: automatically pumping the waste water stock solution in the storage tank into a membrane filtration concentration working section, wherein the membrane material is an organic membrane material, the average pore diameter is 200nm, 95% penetrating fluid is separated in the concentration working section, the penetrating fluid is recycled after reaching the standard after detection, and 5% of the concentrated solution is separated and enters a concentrated solution storage tank.
Step three, treating the concentrated solution at low temperature: quantitatively pumping the concentrated solution into a low-temperature treatment tank, and treating for 2 hours at the temperature of-5 ℃.
Step four, solid-liquid separation: and (3) detecting the temperature of the wastewater in the low-temperature treatment pool to be 30 ℃, pumping the wastewater into a centrifugal machine, feeding the separated liquid into a wastewater storage tank, and treating the separated solid waste as hazardous waste.
Example 3
Treatment of acrylate-vinyl acetate copolymer wastewater
A green treatment method of emulsion polymerization resin wastewater comprises the following steps:
step one, wastewater collection and storage: collecting the reaction kettle washing wastewater generated in the use process of the acrylate-vinyl acetate copolymer, and storing the reaction kettle washing wastewater in a wastewater storage tank.
Step two, concentration: the waste water stock solution in the storage tank is automatically pumped into a low-temperature vacuum evaporation concentration section, the temperature is 37 ℃, and the pressure is 5000 Pa. 60% of clear liquid is separated in the concentration working section, the clear liquid is recycled after reaching the standard in detection, and 40% of concentrated solution separated enters a concentrated solution storage tank.
Step three, treating the concentrated solution at low temperature: quantitatively pumping the concentrated solution into a low-temperature treatment tank, freezing at-50 ℃ for 72h to destroy the stability of an acrylate-vinyl acetate copolymer wastewater system, and collecting and settling the acrylate-vinyl acetate copolymer after thawing.
Step four, solid-liquid separation: and (3) detecting the temperature of the wastewater in the low-temperature treatment pool to be 10 ℃, pumping the wastewater into vacuum filtration equipment, feeding the separated liquid into a wastewater storage tank, and separating solid waste to be acrylate-vinyl acetate copolymer.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A green treatment method of emulsion polymerization resin wastewater is characterized in that: comprises the following steps:
step one, wastewater collection and storage: collecting waste water generated in the production and use processes of the emulsion polymerization resin, and storing the waste water in a waste water storage tank;
step two, concentration: automatically pumping the waste water in the storage tank into a concentration section, separating clear liquid in the concentration section for up-to-standard recycling, and separating concentrated liquid to enter a concentrated liquid storage tank;
step three, treating the concentrated solution at low temperature: quantitatively pumping the concentrated solution into a low-temperature treatment tank, destroying the stability of an emulsion polymerization resin wastewater system by adopting low temperature, and aggregating and settling the polymer resin after thawing;
step four, solid-liquid separation: and after the wastewater in the low-temperature treatment tank is thawed, pumping the wastewater into a solid-liquid separation device, wherein the separated solid waste is polymeric resin, and the separated liquid enters a wastewater storage tank.
2. The method for green treatment of emulsion polymerization resin wastewater as claimed in claim 1, wherein: the concentration process adopted in the concentration section in the second step is vacuum low-temperature evaporation or membrane filtration concentration, and the water removal rate is 60-95%.
3. The method for green treatment of emulsion polymerization resin wastewater as claimed in claim 1, wherein: the solid-liquid separation equipment in the fourth step is one of a plate-and-frame filter press, a centrifugal machine, vacuum filtration equipment and a screw stacking machine.
4. The method for green treatment of emulsion polymerization resin wastewater as claimed in claim 2, wherein: the temperature of the vacuum low-temperature evaporation is 25-40 ℃, and the pressure is 2000-20000 Pa.
5. The method for green treatment of emulsion polymerization resin wastewater as claimed in claim 2, wherein: the membrane material in the membrane filtration concentration is an inorganic membrane or an organic membrane, and the average pore diameter of the membrane is 0.1-1000 nm.
6. The method for green treatment of emulsion polymerization resin wastewater as claimed in claim 1, wherein: the low-temperature treatment temperature of the concentrated solution in the third step is required to be-50-0 ℃, and the low-temperature treatment time is 0-72 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110104696.2A CN112919704A (en) | 2021-01-26 | 2021-01-26 | Green treatment method of emulsion polymerization resin wastewater |
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| CN202110104696.2A CN112919704A (en) | 2021-01-26 | 2021-01-26 | Green treatment method of emulsion polymerization resin wastewater |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000024643A (en) * | 1998-07-13 | 2000-01-25 | Matsushita Electric Ind Co Ltd | Waste water discharging section |
| CN102826622A (en) * | 2011-06-17 | 2012-12-19 | 中国石油化工股份有限公司 | Treatment method of wastewater containing rubber latex |
| CN106277532A (en) * | 2016-09-20 | 2017-01-04 | 南通星辰合成材料有限公司 | Epoxy resin waste-water preprocess method |
-
2021
- 2021-01-26 CN CN202110104696.2A patent/CN112919704A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000024643A (en) * | 1998-07-13 | 2000-01-25 | Matsushita Electric Ind Co Ltd | Waste water discharging section |
| CN102826622A (en) * | 2011-06-17 | 2012-12-19 | 中国石油化工股份有限公司 | Treatment method of wastewater containing rubber latex |
| CN106277532A (en) * | 2016-09-20 | 2017-01-04 | 南通星辰合成材料有限公司 | Epoxy resin waste-water preprocess method |
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Application publication date: 20210608 |