CN218485911U - Vacuum device in PBAT production process - Google Patents
Vacuum device in PBAT production process Download PDFInfo
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- CN218485911U CN218485911U CN202222777924.5U CN202222777924U CN218485911U CN 218485911 U CN218485911 U CN 218485911U CN 202222777924 U CN202222777924 U CN 202222777924U CN 218485911 U CN218485911 U CN 218485911U
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- Prior art keywords
- spraying
- condenser
- production process
- butanediol
- vacuum
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 229920001896 polybutyrate Polymers 0.000 title claims abstract 12
- 239000007921 spray Substances 0.000 claims abstract description 29
- 238000005507 spraying Methods 0.000 claims description 51
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 9
- 239000012071 phase Substances 0.000 claims description 6
- NBBUYPNTAABDEY-UHFFFAOYSA-N cyclobutane-1,1-diol Chemical compound OC1(O)CCC1 NBBUYPNTAABDEY-UHFFFAOYSA-N 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 239000011552 falling film Substances 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000010815 organic waste Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 49
- 230000005494 condensation Effects 0.000 description 11
- 238000009833 condensation Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 238000006116 polymerization reaction Methods 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 229920006238 degradable plastic Polymers 0.000 description 3
- 229920006351 engineering plastic Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- AXKZIDYFAMKWSA-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione Chemical compound O=C1CCCCC(=O)OCCCCO1 AXKZIDYFAMKWSA-UHFFFAOYSA-N 0.000 description 1
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 description 1
- 229920000704 biodegradable plastic Polymers 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses a vacuum apparatus of PBAT production process comprises the entrapment system and the evacuation system that spray, the entrapment system that sprays sets up before the evacuation system, the evacuation system is with the device that obtains the vacuum with dry vacuum pump. The utility model discloses a when vacuum apparatus evacuation, owing to use the dry vacuum pump to replace the steam jet pump, do not produce organic waste water, have that the flow is short, the small investment, do not produce characteristics such as organic waste water.
Description
Technical Field
The utility model belongs to the technical field of organic chemical industry, a vacuum apparatus of PBAT production process is related to, in particular to vacuum apparatus of prepolymerization and polycondensation of PBAT production process.
Background
At present, in the production of engineering plastics and degradable plastic polyester, a multistage steam jet vacuum pump or a full-mechanical Roots slide valve vacuum pump unit which takes water and steam as working media is adopted as vacuum obtaining equipment, and the multistage steam jet vacuum pump and the Roots slide valve vacuum pump unit consume large energy when working. In an engineering plastic and degradable plastic polyester production system adopting a multi-stage steam jet vacuum pump as vacuum obtaining equipment, part of pumped polymer and butanediol gas enter condensed water (or cooling water), and become wastewater which is difficult to treat, so that the environment is polluted. In an engineering plastic and degradable plastic polyester production system adopting a Roots slide valve vacuum pump unit as vacuum obtaining equipment, pumped partial polymer enters a pump cavity, so that a vacuum pump is easy to block, and the maintenance and overhaul workload is large.
Although the ethylene glycol steam jet pump is applied in the PET production process, the ethylene glycol and the butanediol need to be separated due to the use of the butanediol in the PBAT production process, so that the operation difficulty is increased, and the product quality is influenced.
The vacuum system which does not generate waste water and reduces steam consumption is selected, so that the production cost of biodegradable plastic PBAT (copolymer of butylene adipate and butylene terephthalate) can be reduced, and the economic benefit is remarkable.
Disclosure of Invention
The utility model provides a to the defect that prior art exists, the utility model provides a vacuum apparatus of PBAT production process, this vacuum apparatus have the flow short, the small investment, do not produce characteristics such as organic waste water.
The technical scheme of the utility model:
a vacuum device for PBAT production process comprises a spray capture system and a vacuum-pumping system, wherein the spray capture system is arranged in front of the vacuum-pumping system, and the vacuum-pumping system is a device for obtaining vacuum by a dry vacuum pump.
The spraying and trapping system consists of a trap, a butanediol spraying condenser and a liquid seal tank, wherein the trap is capable of trapping oligomers and is arranged in front of the butanediol spraying condenser; the condensate of the butanediol spraying condenser flows into the inner chamber of the liquid seal tank.
The butanediol spraying condenser is a vertical falling film type spraying condenser, and a scraper plate is arranged at a gas lifting port;
the butanediol spraying condenser is a vertical spraying condenser, and a scraping plate is arranged at a first section gas lifting port and can scrape off oligomers attached to the wall of the condenser at regular time; the second section sprays the condenser and adopts low temperature butanediol circulation to spray, can further condense the condensable gas in the lift gas, makes the organic matter quantity that gets into the vacuum pump reduce, in addition, is equipped with waste residue discharging equipment at circulation cyclobutane diol heat well bottom, can be automatically with the waste residue discharge system in the butanediol heat well outside.
The butanediol spraying condenser is a scraper condenser and is divided into a scraper section and a spraying section, the scraper section is provided with a horizontal continuous-running scraper which can continuously scrape off oligomers condensed on the wall of the device and discharge the oligomers out of the system along with the circulating cyclobutanediol through a filter; the spraying section is vertical, 3 layers of spraying can ensure that condensable gases such as butanediol and the like are fully condensed.
The vacuumizing system consists of a dry vacuum pump, a condenser, a tail gas separator and a torch system, wherein an outlet of the dry vacuum pump is connected with the condenser, a gas phase outlet of the condenser is connected with the tail gas separator, and a gas phase outlet of the tail gas separator is connected with the torch system.
The dry vacuum pump is a multi-stage dry vacuum pump with two or more stages, and a cooler is arranged between each stage of the multi-stage dry vacuum pump.
And a liquid phase outlet of the condenser is connected with an inner chamber of a liquid seal tank of the spraying and capturing system.
The lower part of the tail gas separator is provided with an outlet which is connected with the inner chamber of the liquid seal tank of the spraying and capturing system.
The utility model discloses vacuum apparatus is in the application of production PBAT in-process:
the process steam generated by the prepolymerization reactor and/or the final polymerization reactor enters a spraying and trapping system, oligomers are trapped by a trap and then enter a butanediol condenser for condensation, condensate flows into an inner chamber of a liquid seal groove of the spraying and trapping system, enters an outer chamber after being filtered, and forms circulating spraying through a pre-pump filter and a circulating pump.
The gas after passing through the spraying and trapping system enters a dry vacuum pump in a vacuum pumping system, the gas discharged from the dry vacuum pump enters a condenser for condensation, the condensate enters an inner chamber of a liquid seal tank of the spraying and trapping system, the uncondensed gas enters a tail gas separator, the gas discharged from the upper part of the separator is discharged to a torch system, and the material at the lower part enters the inner chamber of the liquid seal tank of the spraying and trapping system for material recovery.
The utility model discloses at production PBAT in-process, have following technological effect:
1. the dry vacuum pump replaces a steam jet pump, the operation efficiency is high, and the energy and electricity consumption is far lower than the steam consumption.
2. Through having increased a condenser in the dry vacuum pump export, this condenser adopts the refrigerated water condensation tail gas, can effectively retrieve organic liquid, avoids tail gas to smuggle liquid secretly and causes the safety risk to the back system.
Drawings
Fig. 1 a schematic structural view of a vacuum apparatus for PBAT production.
In the figure: 1-catcher, 2-butanediol spray condenser, 3-liquid seal tank, 4-filter, 5-circulating pump, 6-cooler, 7-dry vacuum pump, 8-condenser and 9-tail gas separator.
Detailed Description
The invention will be further described with reference to the drawings and examples, but the invention is not limited to these examples.
From fig. 1, the utility model discloses PBAT production process's vacuum apparatus comprises the entrapment system and the evacuation system that spray, sprays the entrapment system setting before the evacuation system, sprays the entrapment system and spray condenser 2 and liquid seal tank 3 by catcher 1, the butanediol that can the entrapment oligomer and constitute, and the catcher is established before the butanediol sprays the condenser. The vacuumizing system consists of a dry vacuum pump 7, a condenser 8, a tail gas separator 9 and a torch system, wherein the outlet of the dry vacuum pump is connected with the condenser, the gas-phase outlet of the condenser is connected with the tail gas separator, and the liquid-phase outlet of the condenser is connected with the inner chamber of the liquid seal tank of the spraying and trapping system. The gas phase outlet of the tail gas separator is connected with the torch system, and the lower part of the tail gas separator is provided with an outlet which is connected with the inner chamber of the liquid seal tank of the spraying and trapping system.
The dry vacuum pump is a two-stage or more multi-stage dry vacuum pump, and a cooler 6 is provided between each stage of the multi-stage dry vacuum pump.
The butanediol spraying condenser of the utility model can be a vertical falling film type spraying condenser, and a scraper blade is arranged at the air lifting port;
the device can also be a vertical spray condenser, and a scraper blade is arranged at the first-stage gas lifting port and can scrape off oligomers attached to the device wall at regular time; the second section of spray condenser adopts low-temperature butanediol circulating spray, can further condense condensable gas in the rising gas, so that the quantity of organic matters entering the vacuum pump is reduced, and in addition, a waste residue discharge device is arranged at the bottom of the circulating cyclobutane diol thermal well, so that waste residues in the butanediol thermal well can be automatically discharged out of the system;
the scraper condenser can also be a scraper condenser which is divided into a scraper section and a spraying section, wherein the scraper section is provided with a horizontal continuous-running scraper which can continuously scrape off the oligomer condensed on the wall of the condenser and discharge the oligomer out of the system along with the circulating cyclobutanediol through a filter; the spraying section is vertical, 3 layers of spraying can ensure that condensable gases such as butanediol and the like are fully condensed.
The following embodiments adopt the utility model discloses the vacuum device of PBAT production process extracts the vacuum and satisfies different vacuum degree requirements.
Example 1:
the process steam generated by the prepolymerization reactor enters a spraying and trapping system, the process steam is trapped by a trap and then enters a butanediol condenser for condensation, the condensate flows into an inner chamber of a liquid seal tank, and then enters an outer chamber after being filtered, and then forms circulating spraying through a pre-pump filter and a circulating pump.
And (3) after passing through the spray trapping system, introducing the gas into a dry vacuum pump in a vacuum pumping system, controlling the absolute pressure of the prepolymerization reactor to be 0.1-50kPa, introducing the gas discharged from the dry vacuum pump into a condenser for condensation, introducing a condensate into an inner chamber of a liquid seal tank of the spray trapping system, introducing the uncondensed gas into a tail gas separator, discharging the gas discharged from the upper part of the separator into a torch system, and returning the lower part of the material to the inner chamber of the liquid seal tank of the spray trapping system for recovering the material.
Example 2
The process steam generated by the final polymerization reactor enters a spraying and trapping system, the process steam is trapped by a trap and then enters a butanediol condenser for condensation, the condensate flows into an inner chamber of a liquid seal tank, and then enters an outer chamber after being filtered, and then forms circulating spraying through a pre-pump filter and a circulating pump.
And (3) after passing through the spray trapping system, introducing the gas into a dry vacuum pump in a vacuum pumping system, controlling the absolute pressure of a final polymerization reactor to be 0.01-0.5 kPa, introducing the gas discharged from the dry vacuum pump into a condenser for condensation, introducing a condensate into an inner chamber of a liquid seal tank of the spray trapping system, introducing the uncondensed gas into a tail gas separator, discharging the gas discharged from the upper part of the separator into a torch system, and returning the lower part of the material to the inner chamber of the liquid seal tank of the spray trapping system for recovering the material.
Example 3
The process steam generated by the first pre-polymerization reactor and the second pre-polymerization reactor enters a spraying and trapping system, the process steam is trapped by a trap and then enters a butanediol condenser for condensation, the condensate flows into an inner chamber of a liquid seal tank, and then is filtered and enters an outer chamber, and then is subjected to a pre-pump filter and a circulating pump to form circulating spraying.
And (3) after passing through the spray trapping system, allowing the gas to enter a dry vacuum pump in a vacuum pumping system, controlling the absolute pressure of the first prepolymerization reactor to be 10 to 50kPa, controlling the absolute pressure of the second prepolymerization reactor to be 0.1 to 1.0kPa, allowing the gas discharged from the dry vacuum pump to enter a condenser for condensation, allowing a condensate to enter an inner chamber of a liquid seal tank of the spray trapping system, allowing the uncondensed gas to enter a tail gas separator, discharging the gas discharged from the upper part of the separator to a torch system, and returning the material at the lower part to the inner chamber of the liquid seal tank of the spray trapping system for material recovery.
Example 4
The process steam generated by the prepolymerization reactor and the final polymerization reactor enters a spraying and trapping system, the process steam is trapped by a trap and then enters a butanediol condenser for condensation, the condensate flows into an inner chamber of a liquid seal tank, and then is filtered and enters an outer chamber, and then forms circulating spraying through a pre-pump filter and a circulating pump.
And (3) after passing through the spray trapping system, introducing the gas into a dry vacuum pump in a vacuum pumping system, controlling the absolute pressure of a prepolymerization reactor to be 0.1-50kPa, controlling the absolute pressure of a final polymerization reactor to be 0.01-0.5kPa, introducing the gas discharged from the dry vacuum pump into a condenser for condensation, introducing the condensate into an inner chamber of a liquid seal tank of the spray trapping system, introducing the uncondensed gas into a tail gas separator, discharging the gas discharged from the upper part of the separator into a torch system, and returning the lower material into the inner chamber of the liquid seal tank of the spray trapping system for recovering the material.
Claims (10)
1. A vacuum device for PBAT production process comprises a spraying and capturing system and a vacuumizing system, wherein the spraying and capturing system is arranged in front of the vacuumizing system; the method is characterized in that: the vacuum pumping system is a device for obtaining vacuum by a dry vacuum pump.
2. Vacuum arrangement of a PBAT production process according to claim 1, characterized in that: the spraying and trapping system consists of a trap, a butanediol spraying condenser and a liquid seal tank, wherein the trap is capable of trapping oligomers and is arranged in front of the butanediol spraying condenser; the condensate of the butanediol spraying condenser flows into the inner chamber of the liquid seal tank.
3. Vacuum arrangement of a PBAT production process according to claim 1, characterized in that: the vacuumizing system consists of a dry vacuum pump, a condenser, a tail gas separator and a torch system, wherein the outlet of the dry vacuum pump is connected with the condenser, the gas phase outlet of the condenser is connected with the tail gas separator, and the gas phase outlet of the tail gas separator is connected with the torch system.
4. Vacuum arrangement of a PBAT production process according to claim 1, characterized in that: the dry vacuum pump is a multi-stage dry vacuum pump with two or more stages.
5. Vacuum arrangement of a PBAT production process according to claim 2, characterized in that: the butanediol spraying condenser is a vertical falling film type spraying condenser, and a scraper plate is arranged at the gas lifting port.
6. Vacuum arrangement of a PBAT production process according to claim 2, characterized in that: the butanediol spraying condenser is a vertical spraying condenser, and a scraper plate is arranged at a first section gas lifting port; the second section of spray condenser adopts low-temperature butanediol to circularly spray, and a waste residue discharge device is arranged at the bottom of the circulating cyclobutane diol thermal well.
7. Vacuum arrangement of a PBAT production process according to claim 2, characterized in that: the butanediol spraying condenser is a scraper condenser and is divided into a scraper section and a spraying section, and the scraper section is provided with a horizontal continuous running scraper; the spraying section is vertical, and 3 layers of spraying ensure that the butanediol condensable gas is fully condensed.
8. Vacuum arrangement of a PBAT production process according to claim 3, characterized in that: and a liquid phase outlet of the condenser is connected with an inner chamber of a liquid seal tank of the spraying and capturing system.
9. Vacuum arrangement of a PBAT production process according to claim 3, characterized in that: the lower part of the tail gas separator is provided with an outlet which is connected with the inner chamber of the liquid seal tank of the spraying and trapping system.
10. Vacuum arrangement of a PBAT production process according to claim 4, characterized in that: and a cooler is arranged between each stage of the multi-stage dry vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222777924.5U CN218485911U (en) | 2022-10-21 | 2022-10-21 | Vacuum device in PBAT production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222777924.5U CN218485911U (en) | 2022-10-21 | 2022-10-21 | Vacuum device in PBAT production process |
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| Publication Number | Publication Date |
|---|---|
| CN218485911U true CN218485911U (en) | 2023-02-17 |
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|---|---|---|---|
| CN202222777924.5U Active CN218485911U (en) | 2022-10-21 | 2022-10-21 | Vacuum device in PBAT production process |
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| CN (1) | CN218485911U (en) |
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- 2022-10-21 CN CN202222777924.5U patent/CN218485911U/en active Active
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 305-84859, Enterprise Service Center, Comprehensive Bonded Zone, Dinghai District, Zhoushan, Zhejiang Province, 316000 Patentee after: Zhoushan Bohu Management Consulting Partnership (L.P.) Address before: Room 104-91, Building 39, No. 128 Yongfeng Road, Daxie Development Zone, Ningbo, Zhejiang 315,812 Patentee before: Ningbo Baihu Management Consulting Partnership (L.P.) |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 82 Gongshang West Road, Shanghe Neighborhood Committee, Pingqiao Town, Huai'an District, Huai'an City, Jiangsu Province, 223001 Patentee after: Huai'an Baihu Management Consulting Partnership Enterprise (L.P.) Address before: Room 305-84859, Enterprise Service Center, Comprehensive Bonded Zone, Dinghai District, Zhoushan, Zhejiang Province, 316000 Patentee before: Zhoushan Bohu Management Consulting Partnership (L.P.) |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240111 Address after: Room B602, Building 1, No. 275 Xintuo Road, Daxie Development Zone, Ningbo City, Zhejiang Province, 315000 (pilot area for residential declaration commitment) Patentee after: Ningbo Jiaer New Material Technology Co.,Ltd. Address before: No. 82 Gongshang West Road, Shanghe Neighborhood Committee, Pingqiao Town, Huai'an District, Huai'an City, Jiangsu Province, 223001 Patentee before: Huai'an Baihu Management Consulting Partnership Enterprise (L.P.) |