CN218689437U - PBS intermittent pilot plant washes cauldron waste liquid recovery unit - Google Patents
PBS intermittent pilot plant washes cauldron waste liquid recovery unit Download PDFInfo
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- CN218689437U CN218689437U CN202222874614.5U CN202222874614U CN218689437U CN 218689437 U CN218689437 U CN 218689437U CN 202222874614 U CN202222874614 U CN 202222874614U CN 218689437 U CN218689437 U CN 218689437U
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Abstract
The utility model belongs to the technical field of waste liquid recovery device, concretely relates to cauldron waste liquid recovery unit is washed to PBS intermittent type pilot scale device. The device for recovering the waste liquid of the PBS intermittent pilot plant washing kettle comprises a reaction kettle, wherein the bottom of the reaction kettle is connected with a cooling tank, the cooling tank is connected with a filter screen, the filter screen is connected with a collecting tank, and the collecting tank is connected with the reaction kettle; the top of the reaction kettle is connected with a cooling tank, a valve a is arranged between the top of the reaction kettle and the cooling tank, a valve b is arranged between the cooling tank and a filter screen, a coil pipe is arranged in the cooling tank, and a jacket is arranged on the outer layer of the reaction kettle; a feed inlet and a nitrogen pipeline are arranged on the reaction kettle, and a stirring device is arranged in the reaction kettle. The utility model provides a PBS intermittent type pilot plant washes cauldron waste liquid recovery unit avoids poisonous and harmful substance to volatilize, washes cauldron waste liquid recovery reuse.
Description
Technical Field
The utility model belongs to the technical field of waste liquid recovery device, concretely relates to cauldron waste liquid recovery unit is washed to PBS intermittent type pilot scale device.
Background
With the increase of traditional non-degradable plastic products, the environmental pollution caused by wastes is more and more serious, particularly the 'white' pollution caused by disposable plastic bags, tableware, agricultural films and the like seriously influences the ecological environment, and simultaneously, the generated micro-plastic can reach the human body through a 'food chain' to influence the health of the human body. Polybutylene succinate (PBS) is used as a completely biodegradable material with excellent mechanical property and molding processability, and can gradually replace traditional products such as disposable plastic bags, tableware, agricultural films and the like. Biological enzyme secreted by microorganisms in the nature can break the PBS macromolecular chain, and can be completely degraded to generate small molecular water and carbon dioxide which are friendly to the environment, so that white pollution generated by the traditional plastics is relieved.
Polybutylene succinate (PBS) is a macromolecular polyester compound generated by the polymerization reaction of micromolecular succinic anhydride or succinic acid and 1, 4-butanediol. PBS has a melting point of 105-116 ℃, is a white crystalline polymer at normal temperature and is molten at high temperature. The presence of impurities during the PBS synthesis process may interrupt the polymerization of molecular chains, resulting in uneven molecular weight distribution of PBS, and thus, the requirement for purity of raw materials is high. In the process of synthesizing the PBS by using the intermittent pilot plant, due to the physicochemical property of the PBS, partial products are adhered to the inner wall of the reaction kettle after the reaction is finished, and low-molecular polymers are remained in the reaction process tower, so that after the reaction is finished each time, the reaction kettle needs to be cleaned by using 1, 4-butanediol under a heating condition, in order to ensure that the PBS remained in the kettle is cleaned, the cleaned 1, 4-butanediol needs to be discharged at the temperature of not lower than 116 ℃, and part of the 1, 4-butanediol volatilizes under the condition, and the 1, 4-butanediol belongs to low-toxicity substances, so that eyes and respiratory tracts can be stimulated, and sleepiness and dizziness are caused; secondly, a small amount of tetrahydrofuran generated by thermal decomposition of 1, 4-butanediol exists in the waste liquid from the kettle washing, which brings serious harm to the environment and the health of operators; meanwhile, the waste liquid from the kettle cleaning process can not be reused, and the waste of raw materials can be caused.
After the reaction of the polybutylene succinate (PBS) intermittent synthesis device is finished, in order to ensure the normal operation of the next reaction, 1, 4-butanediol is required to be used for cleaning the interior of the device under the conditions of 170 ℃ and 11.0Kpa (absolute pressure), and after cleaning, 1, 4-butanediol and trace tetrahydrofuran steam are generated in the waste liquid discharge process, thus harming the health of operators and environmental pollution.
At present, the evaporation of harmful gas is mainly reduced through the cooling down to the cauldron process, but can lead to partial PBS to take place the crystallization after the cooling down, and the adhesion is at the reactor inner wall, can not be fine plays the cleaning performance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the above-mentioned defect that prior art exists, provide a PBS intermittent type pilot scale device and washed cauldron waste liquid recovery device, avoid poisonous harmful substance to volatilize, wash cauldron waste liquid recovery reuse.
The utility model discloses an adopt following technical scheme to realize:
the device for recovering the waste liquid of the PBS intermittent pilot plant washing kettle comprises a reaction kettle, wherein the bottom of the reaction kettle is connected with a cooling tank, the cooling tank is connected with a filter screen, the filter screen is connected with a collecting tank, and the collecting tank is connected with the reaction kettle; the top of the reaction kettle is connected with a cooling tank, a valve a is arranged between the top of the reaction kettle and the cooling tank, a valve b is arranged between the cooling tank and a filter screen, a coil pipe is arranged in the cooling tank, and a jacket is arranged on the outer layer of the reaction kettle; a feed inlet and a nitrogen pipeline are arranged on the reaction kettle, and a stirring device is arranged in the reaction kettle. The valve b is an openable valve.
Preferably, the cooling tank is provided with a demineralized water inlet pipe and a demineralized water outlet pipe.
Preferably, a filtering bypass is arranged between the cooling tank and the collecting tank. The filter bypass is also provided with a filter screen and an openable valve, so that the filter screen can be conveniently opened and cleaned for standby.
Preferably, the pipeline between the outlet of the collecting tank and the upper part of the reaction kettle is a circulating pipe, and a valve c is arranged on the circulating pipe.
Preferably, the reaction kettle is connected with the esterification process tower, the esterification process tower is connected with the heat exchanger, the heat exchanger is connected with the buffer tank a, and the buffer tank a is connected with the esterification water collection tank A.
Preferably, the buffer tank a is connected with the buffer tank b, and the buffer tank b is connected with the vacuum pump group.
Preferably, the reaction kettle is connected with a polymerization process tower, the polymerization process tower is connected with a buffer tank b, and the buffer tank b is connected with a vacuum pump set.
Preferably, the polymerization process tower is connected with the esterification water collecting tank B.
The utility model discloses a PBS intermittent type pilot plant washes cauldron waste liquid recovery unit, at the during operation, PBS production process accomplishes the back, add reation kettle volume 2/3's 1, 4-butanediol from the reation kettle charge door, heat up to 170 ℃ under 11.0Kpa (absolute pressure) condition and wash the cauldron, wash cauldron operation completion back, directly discharge hot 1, 4-butanediol into the cooling bath, for preventing the cooling bath pressure rising, can open the valve a between cooling bath top and the reation kettle top, hot 1, 4-butanediol is cooled down to below 50 ℃ through the demineralized water in the coil pipe in the cooling bath, get into the collecting vat through the filter screen under the action of gravity, but filter screen department sets up open valve, valve b promptly, be convenient for open the clearance filter screen, set up simultaneously and filter the bypass as reserve. The collected solution can be stored in a collecting tank, when the reaction kettle needs to be cleaned next time, a vacuum pump set can be opened, the pressure in the kettle is reduced, a valve c between the top of the reaction kettle and the bottom of the collecting tank is opened, and 1, 4-butanediol in the collecting tank enters the reaction kettle under the vacuum action.
The utility model has the advantages that:
(1) PBS intermittent type pilot scale device wash cauldron waste liquid recovery unit, improve operational environment, the protection operation personnel is healthy, avoids poisonous and harmful gas to discharge.
(2) PBS intermittent type pilot plant wash cauldron waste liquid recovery unit, reduce cost, solution repeatedly usable after collecting, energy saving and consumption reduction.
Drawings
FIG. 1 is a reactor washing waste liquid recovery device of a PBS intermittent pilot plant of the utility model;
in the figure: 1. a reaction kettle; 2. a jacket; 3. a nitrogen line; 4. a feed inlet; 5. a stirring device; 6. an esterification process tower; 7. a heat exchanger; 8. a buffer tank a; 9. an esterification water collection tank A; 10. a polymerization process tower; 11. an esterification water collection tank B; 12. a buffer tank b; 13. a vacuum pump set; 14. a valve a; 15. a cooling tank; 16. a coil pipe; 17. a filter screen; 18. a demineralized water inlet pipe; 19. a demineralized water outlet pipe; 20. a valve b; 21. a filtration bypass; 22. a collection tank; 23. a circulation pipe; 24. and a valve c.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the device for recycling waste liquid from washing the reactor of the PBS intermittent pilot plant of the present invention comprises a reaction kettle 1, wherein the bottom of the reaction kettle 1 is connected with a cooling tank 15, the cooling tank 15 is connected with a filter screen 17, the filter screen 17 is connected with a collection tank 22, and the collection tank 22 is connected with the reaction kettle 1; the top of the reaction kettle 1 is connected with a cooling tank 15, a valve a14 is arranged between the top of the reaction kettle 1 and the cooling tank 15, a valve b20 is arranged between the cooling tank 15 and a filter screen 17, a coil pipe 16 is arranged in the cooling tank 15, and a jacket 2 is arranged on the outer layer of the reaction kettle 1; a feed inlet 4 and a nitrogen pipeline 3 are arranged on the reaction kettle 1, and a stirring device 5 is arranged inside the reaction kettle 1. The valve b20 is an openable valve.
The cooling tank 15 is provided with a demineralized water inlet pipe 18 and a demineralized water outlet pipe 19.
A filtration bypass 21 is provided between the cooling tank 15 and the collection tank 22. The filter bypass 21 is also provided with a filter screen and an openable valve, which is convenient for opening and cleaning the filter screen for standby.
The pipeline between the outlet of the collection tank 22 and the upper part of the reaction kettle 1 is a circulating pipe 23, and a valve c24 is arranged on the circulating pipe 23.
The reaction kettle 1 is connected with an esterification process tower 6, the esterification process tower 6 is connected with a heat exchanger 7, the heat exchanger 7 is connected with a buffer tank a8, and the buffer tank a8 is connected with an esterification water collecting tank A9.
The buffer tank a8 is connected to the buffer tank b12, and the buffer tank b12 is connected to the vacuum pump group 13.
The reaction kettle 1 is connected with a polymerization process tower 10, the polymerization process tower 10 is connected with a buffer tank b12, and the buffer tank b12 is connected with a vacuum pump set 13.
The polymerization process tower 10 is connected with an esterification water collecting tank B11.
The utility model discloses a PBS intermittent type pilot plant washes cauldron waste liquid recovery unit, at the during operation, PBS production process accomplishes the back, add reation kettle volume 2/3's 1, 4-butanediol from the reation kettle charge door, heat up to 170 ℃ under 11.0Kpa (absolute pressure) condition and wash the cauldron, wash cauldron operation completion back, directly discharge hot 1, 4-butanediol into the cooling bath, for preventing the cooling bath pressure rising, can open the valve a between cooling bath top and the reation kettle top, hot 1, 4-butanediol is cooled down to below 50 ℃ through the demineralized water in the coil pipe in the cooling bath, get into the collecting vat through the filter screen under the action of gravity, but filter screen department sets up open valve, valve b promptly, be convenient for open the clearance filter screen, set up simultaneously and filter the bypass as reserve. The collected solution can be stored in a collecting tank, when the reaction kettle needs to be cleaned next time, a vacuum pump set can be opened, the pressure in the kettle is reduced, a valve c between the top of the reaction kettle and the bottom of the collecting tank is opened, and 1, 4-butanediol in the collecting tank enters the reaction kettle under the vacuum action.
Of course, the foregoing is merely exemplary of the present invention and should not be construed as limiting the scope of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.
Claims (8)
1. The utility model provides a PBS intermittent type pilot plant device washes cauldron waste liquid recovery unit which characterized in that: the device comprises a reaction kettle (1), wherein the bottom of the reaction kettle (1) is connected with a cooling tank (15), the cooling tank (15) is connected with a filter screen (17), the filter screen (17) is connected with a collection tank (22), and the collection tank (22) is connected with the reaction kettle (1); the top of the reaction kettle (1) is connected with a cooling tank (15), a valve a (14) is arranged between the top of the reaction kettle (1) and the cooling tank (15), a valve b (20) is arranged between the cooling tank (15) and a filter screen (17), a coil pipe (16) is arranged in the cooling tank (15), and a jacket (2) is arranged on the outer layer of the reaction kettle (1); a feed inlet (4) and a nitrogen pipeline (3) are arranged on the reaction kettle (1), and a stirring device (5) is arranged in the reaction kettle (1).
2. The device for recovering waste liquid from washing kettle of PBS intermittent pilot plant as claimed in claim 1, wherein: the cooling tank (15) is provided with a demineralized water inlet pipe (18) and a demineralized water outlet pipe (19).
3. The device for recovering waste liquid from washing kettle of PBS intermittent pilot plant as claimed in claim 2, wherein: a filtering bypass (21) is arranged between the cooling tank (15) and the collecting tank (22).
4. The device for recovering waste liquid from washing kettle of PBS intermittent pilot plant as claimed in claim 3, wherein: a pipeline between the outlet of the collecting tank (22) and the upper part of the reaction kettle (1) is a circulating pipe (23), and a valve c (24) is arranged on the circulating pipe (23).
5. The device for recovering waste liquid from washing kettle of PBS intermittent pilot plant as claimed in claim 1, wherein: the reaction kettle (1) is connected with an esterification process tower (6), the esterification process tower (6) is connected with a heat exchanger (7), the heat exchanger (7) is connected with a buffer tank a (8), and the buffer tank a (8) is connected with an esterification water collecting tank A (9).
6. The device for recovering waste liquid from washing kettle of PBS intermittent pilot plant as claimed in claim 5, wherein: the buffer tank a (8) is connected with the buffer tank b (12), and the buffer tank b (12) is connected with the vacuum pump set (13).
7. The PBS intermittent pilot plant washing kettle waste liquid recovery device of claim 5, wherein: the reaction kettle (1) is connected with a polymerization process tower (10), the polymerization process tower (10) is connected with a buffer tank b (12), and the buffer tank b (12) is connected with a vacuum pump set (13).
8. The device for recovering waste liquid from washing kettle of PBS intermittent pilot plant as claimed in claim 7, wherein: the polymerization process tower (10) is connected with an esterification water collecting tank B (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222874614.5U CN218689437U (en) | 2022-10-29 | 2022-10-29 | PBS intermittent pilot plant washes cauldron waste liquid recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222874614.5U CN218689437U (en) | 2022-10-29 | 2022-10-29 | PBS intermittent pilot plant washes cauldron waste liquid recovery unit |
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| Publication Number | Publication Date |
|---|---|
| CN218689437U true CN218689437U (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222874614.5U Active CN218689437U (en) | 2022-10-29 | 2022-10-29 | PBS intermittent pilot plant washes cauldron waste liquid recovery unit |
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|---|---|
| CN (1) | CN218689437U (en) |
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2022
- 2022-10-29 CN CN202222874614.5U patent/CN218689437U/en active Active
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