CN114426591A - Vinyl acetate-ethylene copolymer emulsion peculiar smell removing device - Google Patents
Vinyl acetate-ethylene copolymer emulsion peculiar smell removing device Download PDFInfo
- Publication number
- CN114426591A CN114426591A CN202011103192.0A CN202011103192A CN114426591A CN 114426591 A CN114426591 A CN 114426591A CN 202011103192 A CN202011103192 A CN 202011103192A CN 114426591 A CN114426591 A CN 114426591A
- Authority
- CN
- China
- Prior art keywords
- vinyl acetate
- film evaporator
- ethylene copolymer
- copolymer emulsion
- emulsion
- 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.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F6/00—Post-polymerisation treatments
- C08F6/14—Treatment of polymer emulsions
- C08F6/16—Purification
Abstract
The invention belongs to the technical field of vinyl acetate, and particularly relates to a device for removing peculiar smell of vinyl acetate-ethylene copolymer emulsion. Vinyl acetate-ethylene copolymerization emulsion peculiar smell remove device, including the same removal mechanism of multilevel structure, all removal mechanisms communicate in proper order, should get rid of the mechanism and include: the bottom of the film evaporator is provided with a gas injection port; the condenser is communicated with a steam outlet of the thin film evaporator; and the liquid inlet end of the feeding pump is communicated with the discharge hole of the film evaporator, and the liquid outlet end of the feeding pump is communicated with the feed inlet of the film evaporator of the next-stage removing mechanism. The device can obviously reduce the content of VAC in the vinyl acetate-ethylene copolymer emulsion; the peculiar smell of the vinyl acetate-ethylene copolymer emulsion can be removed, and the treated vinyl acetate-ethylene copolymer emulsion can meet the use requirements of high environmental protection requirement fields such as automobiles, furniture and the like.
Description
Technical Field
The invention belongs to the technical field of vinyl acetate, and particularly relates to a device for removing peculiar smell of vinyl acetate-ethylene copolymer emulsion.
Background
Vinyl acetate-ethylene copolymer, also known as vinyl acetate-ethylene copolymer, EVA emulsion, VAE emulsion, etc., is a high molecular emulsion produced by copolymerizing vinyl acetate and ethylene ("VAE emulsion environmental protection research progress", strain, medium and small-sized business management and science and technology, No. 8 in 2017, No. 1 to 2 in the left column on page 92, No. 4 and 25 days in 2017, "VAE emulsion research progress", wangting, adhesive, No. 8 in volume 19 in china in 2018, No. 1 and No. 4 in the left column on page 59, No. 8 and 31 days in 2010 and No. 8).
The vinyl acetate-ethylene copolymer emulsion has permanent flexibility, good bonding performance, acid and alkali resistance, ultraviolet light aging resistance, weather resistance, water resistance and film forming property, and is widely applied to the fields of buildings, building materials, cigarette adhesive, waterproof coating, films, foamed shoe materials, hot melt adhesives, electric wires and cables, injection molding toys, adhesives, textiles, paper processing and the like ("VAE emulsion environmental protection research progress", Zhang Hua, medium and small enterprise management and science, 2017, 8 th stage, 92 th page abstract line 1, left column, section 1, lines 2 to 4, published day, 2017, 4 and 25 days; "VAE emulsion production and application", Lutaibanian and the like, popular science and technology, 2019, volume 21, 237 th stage, page 33, left column, section 1, lines 1 to 14, published day, 2019, 5 and 31 days).
However, the vinyl acetate-ethylene copolymer emulsion is obtained by copolymerizing a vinyl acetate monomer and an ethylene monomer, and in actual production, the monomer cannot achieve a conversion rate of 100%, and a part of unreacted monomer inevitably remains in the obtained emulsion, thereby generating an odor.
Disclosure of Invention
In view of the above, the present invention aims to provide a device for removing odor from vinyl acetate-ethylene copolymer emulsion.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a vinyl acetate-ethylene copolymerization emulsion peculiar smell remove device, includes the same removal mechanism of multilevel structure, and all removal mechanisms communicate in proper order, and this removal mechanism includes:
the bottom of the film evaporator is provided with a gas injection port;
the condenser is communicated with a steam outlet of the thin film evaporator;
and the liquid inlet end of the feeding pump is communicated with the discharge hole of the film evaporator, and the liquid outlet end of the feeding pump is communicated with the feed inlet of the film evaporator of the next-stage removing mechanism.
Further, the film scraper of the thin film evaporator comprises a movable scraper group and a fixed scraper group, and blades of the movable scraper group and the fixed scraper group are arranged around a rotating shaft of the film scraper at intervals.
Further, the outer wall surface of the film evaporator is provided with a steam jacket.
And the device further comprises a flow control pump, and the flow control pump is communicated with a feed inlet of the thin film evaporator of the primary removing mechanism.
Further, the flow control pump adopts a diaphragm pump.
Further, the bottom of the thin film evaporator is provided with a gas flowmeter.
Further, the vinyl acetate-ethylene copolymer emulsion peculiar smell removing device also comprises a buffer tank, and the buffer tank is communicated with the liquid outlet end of the feeding pump of the last stage of removing mechanism.
Further, the vinyl acetate-ethylene copolymer emulsion peculiar smell removing device also comprises a filter and a storage tank, and the storage tank is communicated with the buffer tank through the filter.
Further, the filter adopts a drum filter.
The invention has the beneficial effects that:
the device can obviously reduce the content of VAC in the vinyl acetate-ethylene copolymer emulsion.
The device can remove the peculiar smell of the vinyl acetate-ethylene copolymer emulsion, and the treated vinyl acetate-ethylene copolymer emulsion can meet the use requirements of high environmental protection requirement fields such as automobiles, furniture and the like.
The device has simple structure and is beneficial to realizing industrial production.
Drawings
FIG. 1 is a schematic view of the odor removing apparatus for vinyl acetate-ethylene copolymer emulsion according to example 1, wherein,
1 is a flow control pump, 2 is a thin film evaporator, 21 is a movable scraper set, 22 is a fixed scraper set, 23 is a rotating shaft, 24 is a steam jacket, 25 is a gas flowmeter, 26 is a motor, 3 is a condenser, 4 is a feed pump, 5 is a buffer tank, 6 is a filter, 7 is a storage tank, and 8 is a pressure pump.
Detailed Description
The examples are provided for better illustration of the present invention, but the present invention is not limited to the examples. Therefore, those skilled in the art should make insubstantial modifications and adaptations to the embodiments of the present invention in light of the above teachings and remain within the scope of the invention.
Example 1
As shown in fig. 1, the vinyl acetate-ethylene copolymer emulsion odor removing device comprises two removing mechanisms with the same structure, all the removing mechanisms are communicated in sequence, and the removing mechanisms comprise:
the bottom of the thin film evaporator 2 is provided with a gas injection port;
the condenser 3 is communicated with a steam outlet of the thin film evaporator 2;
a liquid inlet end of the feeding pump 4 is communicated with a discharge outlet of the film evaporator 2, and a liquid outlet end of the feeding pump is communicated with a feed inlet of the next-stage removing mechanism film evaporator 2;
the film evaporator 2 is an existing wiped film evaporator and is provided with a liquid distributor and a wiped film evaporator, the injected emulsion can be uniformly distributed on the inner wall surface of the film evaporator 2 by the liquid distributor, the wiped film evaporator can rotate to scrape the liquid on the inner wall surface into a film so as to better transfer heat with the stripping gas entering from the bottom, so that residual vinyl acetate monomer and organic volatile components in the emulsion are continuously transferred into the stripping gas, and the residual vinyl acetate monomer and the organic volatile components in the emulsion are taken out from a steam outlet in a gas phase form.
In the present embodiment, the film scraper of the film evaporator 2 comprises a movable scraper set 21 and a fixed scraper set 22, and the blades of the movable scraper set 21 and the fixed scraper set 22 are arranged around the rotating shaft 23 of the film scraper at intervals, so that the emulsion is uniformly distributed on the inner wall of the film evaporator, and the film formed by the emulsion from which the vinyl acetate and the residual monomers are removed is scraped off from the inner wall in time.
The outer wall surface of the thin film evaporator 2 is provided with a steam jacket 24; the bottom of the thin film evaporator 2 is provided with a gas flow meter 25.
The vinyl acetate-ethylene copolymer emulsion peculiar smell removing device also comprises a flow control pump 1, wherein the flow control pump 1 is communicated with a feed inlet of a film evaporator 2 of a primary removing mechanism, and the flow control pump 1 adopts a diaphragm pump;
the vinyl acetate-ethylene copolymer emulsion peculiar smell removing device also comprises a buffer tank 5, and the buffer tank 5 is communicated with the liquid outlet end of a feeding pump 4 of the last stage of removing mechanism;
the vinyl acetate-ethylene copolymer emulsion peculiar smell removing device also comprises a filter 6 and a storage tank 7, wherein the storage tank 7 is communicated with the buffer tank 5 through the filter 6;
specifically, the filter 6 is a drum filter.
When the device of the embodiment is adopted to remove the peculiar smell of the vinyl acetate-ethylene copolymer emulsion, the emulsion enters the first-stage film evaporator 2 from the feeding hole, the motor 26 of the film evaporator 2 drives the blades of the movable scraper group 21 and the fixed scraper group 22 through the rotating shaft 23 to form the film of the emulsion, the steam jacket 24 heats the first-stage film evaporator 2, the liquid distributor enables the emulsion to be uniformly distributed along the inner wall of the first-stage film evaporator 2, the blowing gas (nitrogen, carbon dioxide, inert gas or air, which can be carried with steam or hot water) entering from the gas injection hole is in countercurrent contact with the emulsion descending along the inner wall of the evaporation cylinder, the two-phase contact heat and mass transfer are carried out, the residual vinyl acetate monomer and the organic volatile component in the emulsion are continuously transferred to the blowing gas, thereby carrying residual vinyl acetate monomer and organic volatile components in the emulsion out of the vapor outlet in vapor phase; the discharged gas phase enters a first-stage condenser 3 for condensation and then is stored;
the emulsion is discharged from a discharge port and then enters a second-stage film evaporator 2 through a feeding pump 4, a motor 26 drives blades of a movable scraper group 21 and a fixed scraper group 22 through a rotating shaft 23 to enable the emulsion to form a film, a steam jacket 24 heats the second-stage film evaporator 2, a liquid distributor enables the emulsion to be uniformly distributed along the inner wall of the second-stage film evaporator 2, blown gas (nitrogen, carbon dioxide, inert gas or air and carrying steam or hot water) entering from an air inlet is in countercurrent contact with the emulsion descending along the inner wall of an evaporation cylinder, the two phases are in contact with each other to transfer heat and mass, and residual vinyl acetate monomers and organic volatile components in the emulsion are continuously transferred into the blown gas, so that the residual vinyl acetate monomers and the organic volatile components in the emulsion are continuously taken out from a steam outlet in a gas phase form; the discharged gas phase enters a second-stage condenser 3 for condensation and then is stored;
the emulsion is discharged from the discharge port, conveyed to the buffer tank 5 through the pressure pump 8, filtered and cooled by the filter 6 from the buffer tank 5, and then enters the storage tank 7 for storage.
Example 2
The device of example 1 was used to remove the odor of vinyl acetate-ethylene copolymer emulsion, and the specific steps were as follows:
controlling the feeding amount of a raw material VAE emulsion with the temperature of 60 ℃ from a deaeration tank to be 3000kg/h by using a flow control pump 1, feeding the raw material VAE emulsion into a first-stage film evaporator 2 from a feeding hole, driving blades of a movable scraper group 21 and a fixed scraper group 22 by a motor 26 through a rotating shaft 23 to form a film by the emulsion, and controlling the bottom temperature of the first-stage film evaporator 2 to be 83 ℃, the middle temperature to be 82 ℃ and the top temperature to be 73 ℃ through the steam flow of a steam jacket 24; the liquid distributor enables the emulsion to be uniformly distributed along the inner wall of the evaporation cylinder;
the nitrogen aeration rate was controlled to 110Nm by the gas flowmeter 253H and 80kg/h of S are added under nitrogen0.6Water vapor (i.e., superheated steam at 165 ℃ and a pressure of 0.6 MPa);
the nitrogen with the water vapor enters the first-stage thin film evaporator 2 from the gas injection port and is in countercurrent contact with the emulsion descending along the inner wall of the evaporation cylinder, the two phases are in contact with each other to transfer heat and mass, and the residual vinyl acetate monomer and the organic volatile component in the emulsion are continuously transferred to the stripping gas, so that the residual vinyl acetate monomer and the organic volatile component in the emulsion are taken out from the steam outlet in a gas phase form; the discharged gas phase enters a first-stage condenser 3 for condensation and then is stored;
the emulsion with residual temperature discharged from the discharge port is fed into the second-stage film evaporator 2 by adopting a feeding pump 4 to control the feeding amount to be 3000kg/h, a motor 26 drives blades of a movable scraper group 21 and a fixed scraper group 22 through a rotating shaft 23 to form the emulsion into a film, and a liquid distributor enables the emulsion to be uniformly distributed along the inner wall of the second-stage film evaporator 2;
the nitrogen aeration rate was controlled to 50Nm by the gas flowmeter 253The nitrogen enters the second-stage film evaporator 2 from the gas injection port and is in countercurrent contact with the emulsion descending along the inner wall of the second-stage film evaporator 2, the two phases are in contact with each other to transfer heat and mass, and the residual vinyl acetate monomer and the organic volatile component in the emulsion are continuously transferred to the stripping gas, so that the residual vinyl acetate monomer and the organic volatile component in the emulsion are taken out from the steam outlet in a gas phase form; the discharged gas phase enters a second-stage condenser 3 for condensation and then is stored;
the emulsion is discharged from the discharge port, conveyed to the buffer tank 5 through the pressure pump 8, filtered and cooled by the filter 6 from the buffer tank 5, and then enters the storage tank 7 for storage.
Performance detection
The raw material VAE emulsion (i.e., vinyl acetate-ethylene copolymer emulsion) used in example 2 was examined for solid content, viscosity, pH, VAC (i.e., residual vinyl acetate monomer) content, residue content, benzene content, and odor level;
meanwhile, the VAE emulsion treated in example 2 was examined for solid content, viscosity, pH, VAC (i.e., residual vinyl acetate monomer) content, residue content, benzene content, and odor grade, and the results are shown in Table 1.
Table 1 results of performance testing
As can be seen from table 1, the VAC content of the VAE emulsion treated by the method of example 2 is significantly reduced, the odor grade is significantly reduced, and the benzene content is significantly reduced. It is thus demonstrated that the process of the present invention is capable of significantly reducing the residual VAC monomer content and benzene content of VAE emulsions.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a vinyl acetate-ethylene copolymerization emulsion peculiar smell remove device which characterized in that, includes the same mechanism of getting rid of multilevel structure, and all get rid of the mechanism and communicate in proper order, should get rid of the mechanism and include:
the bottom of the film evaporator is provided with a gas injection port;
the condenser is communicated with a steam outlet of the thin film evaporator;
and the liquid inlet end of the feeding pump is communicated with the discharge hole of the film evaporator, and the liquid outlet end of the feeding pump is communicated with the feed inlet of the film evaporator of the next-stage removing mechanism.
2. The vinyl acetate-ethylene copolymer emulsion odor removing apparatus according to claim 1, wherein the film scraper of the thin film evaporator comprises a movable blade group and a fixed blade group, and blades of the movable blade group and the fixed blade group are arranged at intervals around a rotation axis of the film scraper.
3. The apparatus for removing odor from vinyl acetate-ethylene copolymer emulsion according to claim 1, wherein the outer wall surface of said thin film evaporator is provided with a steam jacket.
4. The vinyl acetate-ethylene copolymer emulsion odor removing device according to any one of claims 1 to 3, further comprising a flow control pump which communicates with a feed port of the thin film evaporator of the primary removing mechanism.
5. The apparatus of claim 4, wherein the flow control pump is a diaphragm pump.
6. The vinyl acetate-ethylene copolymer emulsion odor removing device according to any one of claims 1 to 5, wherein a gas flow meter is provided at the bottom of the thin film evaporator.
7. The apparatus for removing odor from vinyl acetate-ethylene copolymer emulsion according to any one of claims 1 to 6, further comprising a buffer tank connected to the outlet of the feed pump of the last stage of said removing mechanism.
8. The apparatus for removing odor of vinyl acetate-ethylene copolymer emulsion according to claim 7, further comprising a filter and a holding tank communicating with said buffer tank through the filter.
9. The device for removing odor of vinyl acetate-ethylene copolymer emulsion according to claim 8, wherein the filter is a drum filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011103192.0A CN114426591A (en) | 2020-10-15 | 2020-10-15 | Vinyl acetate-ethylene copolymer emulsion peculiar smell removing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011103192.0A CN114426591A (en) | 2020-10-15 | 2020-10-15 | Vinyl acetate-ethylene copolymer emulsion peculiar smell removing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114426591A true CN114426591A (en) | 2022-05-03 |
Family
ID=81309491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011103192.0A Pending CN114426591A (en) | 2020-10-15 | 2020-10-15 | Vinyl acetate-ethylene copolymer emulsion peculiar smell removing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114426591A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3554264A (en) * | 1968-06-14 | 1971-01-12 | Artisan Ind | Thin-film evaporator having improved apparatus for removing viscous material |
| US4017355A (en) * | 1970-12-18 | 1977-04-12 | Nippon Oil Company Ltd. | Process for treating latices |
| US4032497A (en) * | 1974-07-19 | 1977-06-28 | Kureha Kagaku Kogyo Kabushiki Kaisha | Method and apparatus for removal of unreacted monomer from synthesized high polymer latex |
| CN203494227U (en) * | 2013-08-23 | 2014-03-26 | 中国石油化工集团公司 | Devolatilization system of polymer emulsion |
| US20150038736A1 (en) * | 2012-03-16 | 2015-02-05 | Mitsubishi Rayon Co., Ltd. | Vertical centrifugal thin film evaporator and monomer purification method |
| CN111100220A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Post-treatment method of vinyl acetate-ethylene copolymer emulsion |
-
2020
- 2020-10-15 CN CN202011103192.0A patent/CN114426591A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3554264A (en) * | 1968-06-14 | 1971-01-12 | Artisan Ind | Thin-film evaporator having improved apparatus for removing viscous material |
| US4017355A (en) * | 1970-12-18 | 1977-04-12 | Nippon Oil Company Ltd. | Process for treating latices |
| US4032497A (en) * | 1974-07-19 | 1977-06-28 | Kureha Kagaku Kogyo Kabushiki Kaisha | Method and apparatus for removal of unreacted monomer from synthesized high polymer latex |
| US20150038736A1 (en) * | 2012-03-16 | 2015-02-05 | Mitsubishi Rayon Co., Ltd. | Vertical centrifugal thin film evaporator and monomer purification method |
| CN203494227U (en) * | 2013-08-23 | 2014-03-26 | 中国石油化工集团公司 | Devolatilization system of polymer emulsion |
| CN111100220A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Post-treatment method of vinyl acetate-ethylene copolymer emulsion |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103044598B (en) | Method for flash evaporating and concentrating of liquid ethylene propylene rubber | |
| CN219231448U (en) | Polymer devolatilization system | |
| EP3824989A1 (en) | Draw solute, draw solution, and forward-osmosis water treatment method | |
| CN109851778B (en) | Method for preparing polybutyrolactam by anion ring-opening polymerization | |
| CN114426591A (en) | Vinyl acetate-ethylene copolymer emulsion peculiar smell removing device | |
| CA2879358C (en) | Method for removing an ester from a vapor mixture | |
| CN212269953U (en) | Nylon 6 melt devolatilization reaction kettle and devolatilization device | |
| US2389958A (en) | Recovery of polymeric materials | |
| US3959009A (en) | Method for continuously purifying pullulan | |
| US5902553A (en) | Method and apparatus for the production of polyamide 6 from polymide waste | |
| CN101220109A (en) | Supercritical fluid devolatilization method of verelite | |
| CN114773587B (en) | Epoxy propane removal process for PPC production process | |
| JP2005508735A5 (en) | ||
| CN106632992A (en) | Ultraviolet light curable epoxy acrylate resin and preparation method | |
| JPH06157637A (en) | Method of reduction of residual volatile matter in polymer | |
| CN112569790A (en) | Synthetic rubber solvent dewatering device | |
| CN102690374A (en) | Method for comprehensively drying liquid rubber and drying device | |
| CN1188356C (en) | Waste water treating method for methyl ethyl ketone production | |
| CA2335577A1 (en) | Method for isolating polymers from solutions | |
| CN101652390B (en) | Process for the preparation of nitrocellulose solutions having a low water content | |
| Jin et al. | Study on epoxy resin modified by polyether ionic liquid | |
| CN112759693A (en) | Single-component emulsion suitable for coating surface of PP (polypropylene) artificial synthetic paper and synthetic method thereof | |
| CN113769423A (en) | Cyclic supplement type devolatilization device and process | |
| CN202638011U (en) | Drying device for liquid rubber | |
| JP4180125B2 (en) | Purification method of polymerization reaction product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |