CN218589700U - Tail gas rectification flash distillation device of semi-aromatic polyester-polycarbonate copolymer - Google Patents
Tail gas rectification flash distillation device of semi-aromatic polyester-polycarbonate copolymer Download PDFInfo
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- CN218589700U CN218589700U CN202222226350.2U CN202222226350U CN218589700U CN 218589700 U CN218589700 U CN 218589700U CN 202222226350 U CN202222226350 U CN 202222226350U CN 218589700 U CN218589700 U CN 218589700U
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- rectifying column
- flash distillation
- flash
- semi
- tail gas
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- 238000007701 flash-distillation Methods 0.000 title claims abstract description 20
- 229920000515 polycarbonate Polymers 0.000 title claims abstract description 17
- 239000004417 polycarbonate Substances 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000009833 condensation Methods 0.000 claims abstract description 17
- 230000005494 condensation Effects 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000001704 evaporation Methods 0.000 claims description 22
- 230000008020 evaporation Effects 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 5
- 210000003437 trachea Anatomy 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 45
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 abstract description 39
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract description 15
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 abstract description 15
- 238000007599 discharging Methods 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000002309 gasification Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 abstract 1
- 230000006837 decompression Effects 0.000 abstract 1
- 238000009835 boiling Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- -1 aromatic anhydride Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses a tail gas rectification flash distillation device of semi-aromatic polyester-polycarbonate copolymer, including flash distillation cauldron and the rectifying column that is connected with the flash distillation cauldron, discharge the tail gas that the condensation becomes the liquid drop into in the flash distillation cauldron, before discharging, carry out decompression treatment to waste gas through the relief pressure valve, after discharging into the flash distillation cauldron, heat inside through first heating element, at this moment, diphenyl carbonate and bisphenol A fast gasification in the gas, discharge into in the rectifying column, and remaining phenol alright with diphenyl carbonate and bisphenol A separation, discharge through first drain pipe, before discharging into the rectifying column, at first cool off gasified gas through the condenser, become the liquid drop with the gas secondary condensation, then heat in discharging into the rectifying column, bisphenol A fast gasification in the liquid upwards discharges this moment, alright bisphenol A separates with carbonic acid, phenol after the separation can be used for the synthetic reaction again through later stage processing, holistic result of use has been guaranteed.
Description
Technical Field
The utility model belongs to the technical field of the tail gas treatment, specifically be a tail gas rectification flash distillation device of semi-aromatic polyester-polycarbonate copolymer.
Background
The aromatic anhydride is introduced as a reaction monomer, and under a certain reaction condition with propylene oxide and carbon dioxide under the action of a catalyst, the semi-aromatic polyester-polycarbonate copolymer can be synthesized, the glass transition temperature of the material can be effectively improved, the melt index of the material can be reduced, the subsequent processing and transportation are facilitated, harmful tail gas is generated after the semi-aromatic polyester-polycarbonate copolymer is produced at present, and a tail gas treatment device is required to be used for purifying the tail gas.
The main harmful components in the tail gas comprise bisphenol A, diphenyl carbonate, phenol and the like, wherein the phenol can be used as a raw material for the synthesis reaction of the semi-aromatic polyester-polycarbonate copolymer, the tail gas is mainly purified by a membrane bioreactor at present, but the waste of materials such as bisphenol A, diphenyl carbonate, phenol and the like can be caused by adopting the treatment mode, and in order to solve the problems, the tail gas rectification flash evaporation device of the semi-aromatic polyester-polycarbonate copolymer is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: in order to solve the problems, the tail gas rectification flash evaporation device for the semi-aromatic polyester-polycarbonate copolymer is provided.
The utility model adopts the technical scheme as follows: a tail gas rectification flash device of a semi-aromatic polyester-polycarbonate copolymer comprises a flash kettle and a rectifying tower connected with the flash kettle, wherein a pressure reducing valve is installed at the liquid inlet end of the flash kettle, and a first heating element is installed in the inner wall of the flash kettle;
the exhaust side at the upper end of the flash evaporation kettle is connected with the gas inlet end of the rectifying tower through a gas pipe, and the inner walls of the rectifying tower and the flash evaporation kettle are both provided with temperature sensors;
the upper end of rectifying column installs the condensation lid, install cooling coil in the condensation lid, install on the upside both ends inner wall of rectifying column and connect the liquid board, be equipped with the condenser on the trachea.
In a preferred embodiment, the lower inner wall of the rectifying tower is provided with a second heating element, and the lower end of the rectifying tower is provided with a stirrer.
In a preferred embodiment, the agitator includes motor and stirring rake, the right-hand member downside intercommunication of flash distillation cauldron has first fluid-discharge tube, the least significant end and the rectifying column intercommunication of liquid receiving plate have the second fluid-discharge tube, the right-hand member downside intercommunication of rectifying column has the third fluid-discharge tube.
In a preferred embodiment, the two ends of the cooling coil are respectively provided with a cooling water inlet and a cooling water outlet through the condensation cover.
In a preferred embodiment, the condensation cover is inverted "U" shaped, and the liquid receiving plate is formed in a "v" shape as a whole.
In a preferred embodiment, the outer ends of the flash tank and the rectifying tower are provided with a control console.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
the utility model discloses in, flash distillation cauldron and rectifying column have been connected at the tail gas discharge end to this device, according to bisphenol A, the boiling point that diphenyl carbonate and phenol are different, set up the heating temperature in flash distillation cauldron and the rectifying column, in the flash distillation cauldron, phenol alright with diphenyl carbonate and bisphenol A separation, then separate diphenyl carbonate and bisphenol A through the rectifying column, can also retrieve bisphenol A and phenol when handling tail gas, phenol after the separation can be used for the synthesis reaction again through later stage processing, can realize the recovery of resource, use effect has been guaranteed.
Drawings
Fig. 1 is a schematic view of the overall cross-sectional plane structure of the present invention;
fig. 2 is a schematic view of the overall front view of the present invention.
The mark in the figure is: 1-a pressure reducing valve, 2-a liquid inlet end, 3-a temperature sensor, 4-a flash evaporation kettle, 5-a first heating element, 6-an air pipe, 7-a rectifying tower, 8-a condensation cover, 9-a cooling coil, 10-a liquid receiving plate, 11-a second liquid discharging pipe, 12-a second heating element, 13-a third liquid discharging pipe, 14-a stirrer, 15-a console and 16-a condenser.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1-2, a tail gas rectification and flash evaporation device of a semi-aromatic polyester-polycarbonate copolymer comprises a flash evaporation kettle 4 and a rectifying tower 7 connected with the flash evaporation kettle 4, wherein a pressure reducing valve 1 is installed on a liquid inlet end 2 of the flash evaporation kettle 4, a first heating element 5 is installed in the inner wall of the flash evaporation kettle 4, and an exhaust side of the upper end of the flash evaporation kettle 4 is connected with a gas inlet end of the rectifying tower 7 through a gas pipe 6. When the tail gas is used, the tail gas condensed into liquid drops is discharged into a flash evaporation kettle 4, the pressure of the tail gas is reduced through a pressure reducing valve 1 before the tail gas is discharged into the flash evaporation kettle 4, the interior of the tail gas is heated to 260-280 ℃ through a first heating element 5, diphenyl carbonate and bisphenol A in the gas are quickly gasified and discharged into a rectifying tower 7, and the rest phenol can be separated from the diphenyl carbonate and the bisphenol A.
Wherein, the gas discharged into the flash evaporation kettle 4 can be condensed by an external condensing device.
All install temperature-sensing ware 3 on the inner wall of rectifying column 7 and flash distillation cauldron 4, condensation cover 8 is installed to the upper end of rectifying column 7, installs cooling coil 9 in the condensation cover 8, installs on the upside both ends inner wall of rectifying column 7 and connects liquid board 10, is equipped with condenser 16 on the trachea 6. Before being discharged into a rectifying tower 7, firstly, the gasified gas is cooled through a condenser 16, the gas is secondarily condensed into liquid drops, then the liquid drops are discharged into the rectifying tower 7, then the liquid drops are heated to about 220-240 ℃, bisphenol A in the liquid is quickly gasified and discharged upwards at the moment, the diphenyl carbonate can be separated, the separated phenol can be reused for synthesis reaction after post processing, meanwhile, the gas with the bisphenol A is contacted with a cooling coil pipe 9 at the upper end, the condensed liquid is discharged through a second liquid discharge pipe 11, and the bisphenol A, the diphenyl carbonate and the phenol can be respectively separated.
In this embodiment, install second heating element 12 on rectifying column 7's the downside inner wall, agitator 14 is installed to rectifying column 7's lower extreme, agitator 14 is including motor and stirring rake, the right-hand member downside intercommunication of flash distillation cauldron 4 has first fluid-discharge tube, the least significant end that connects liquid board 10 has second fluid-discharge tube 11 with rectifying column 7 intercommunication, rectifying column 7's right-hand member downside intercommunication has third fluid-discharge tube 13, at the in-process of rectification, the motor drives the stirring rake and rotates, can stir the operation to liquid, can improve the gasification rate of liquid.
In this embodiment, two ends of the cooling coil 9 respectively penetrate through the condensation cover 8 to form a cooling water inlet and a cooling water outlet, wherein the cooling water inlet can be connected to the cooling water tank.
It should be noted that, the pumping and the liquid pumping herein are performed by corresponding pump bodies, and since the pump bodies are generally used, no actual description is shown or described herein.
In this embodiment, the condensation cover 8 is inverted "U" shaped, the liquid receiving plate 10 is formed in an overall "eight" shape, the vaporized bisphenol a-containing gas contacts the condensation cover 8 at the upper end, the bisphenol a gas is condensed and liquefied, and the liquefied gas flows into the liquid receiving plate 10 through the condensation cover 8 and is discharged through the second liquid discharge pipe 11.
In the examples, the boiling point of bisphenol A is about 220 ℃, the boiling point of diphenyl carbonate is about 304 ℃, and the boiling point of phenol is about 400 ℃.
In this embodiment, the outer ends of the flash evaporation kettle 4 and the rectifying tower 7 are provided with a control console 15, and the control console 15 is electrically connected with the corresponding temperature sensor 3 and the heating element respectively, and the control console 15 controls the whole operation of the device.
When the tail gas is used, the tail gas condensed into liquid drops is firstly discharged into a flash evaporation kettle 4, before the tail gas is discharged, the pressure reduction treatment is carried out on the waste gas through a pressure reducing valve 1, after the tail gas is discharged into the flash evaporation kettle 4, the interior of the tail gas is heated to 260-280 ℃ through a first heating element 5, diphenyl carbonate and bisphenol A in the gas are quickly gasified at the moment and are discharged into a rectifying tower 7, the rest phenol can be separated from diphenyl carbonate and bisphenol A, the gasified gas is firstly cooled through a condenser 16 before being discharged into the rectifying tower 7, the gas is secondarily condensed into liquid drops and then is discharged into the rectifying tower 7 and is heated to about 220-240 ℃, the bisphenol A in the liquid is quickly gasified and is discharged upwards, the diphenyl carbonate can be separated, the separated phenol can be reused for a synthesis reaction after post-processing, meanwhile, the gas with the bisphenol A is contacted with a cooling coil 9 at the upper end, and the condensed liquid is discharged through a second liquid discharge pipe 11.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (6)
1. The utility model provides a tail gas rectification flash distillation device of semi-aromatic polyester-polycarbonate copolymer, is including flash distillation cauldron (4) and rectifying column (7) that are connected with flash distillation cauldron (4), its characterized in that: a reducing valve (1) is installed on a liquid inlet end (2) of the flash evaporation kettle (4), and a first heating element (5) is installed in the inner wall of the flash evaporation kettle (4);
the exhaust side at the upper end of the flash evaporation kettle (4) is connected with the gas inlet end of a rectifying tower (7) through a gas pipe (6), and the inner walls of the rectifying tower (7) and the flash evaporation kettle (4) are provided with temperature sensors (3);
condensation cover (8) are installed to the upper end of rectifying column (7), install cooling coil (9) in condensation cover (8), install on the upside both ends inner wall of rectifying column (7) and connect liquid board (10), be equipped with condenser (16) on trachea (6).
2. The tail gas rectification flash apparatus of the semi-aromatic polyester-polycarbonate copolymer according to claim 1, wherein: install second heating element (12) on the downside inner wall of rectifying column (7), agitator (14) are installed to the lower extreme of rectifying column (7).
3. The tail gas rectification flash apparatus of the semi-aromatic polyester-polycarbonate copolymer according to claim 2, wherein: agitator (14) is including motor and stirring rake, the right-hand member downside intercommunication of flash distillation cauldron (4) has first fluid-discharge tube, connect the least significant end of liquid board (10) and rectifying column (7) intercommunication to have second fluid-discharge tube (11), the right-hand member downside intercommunication of rectifying column (7) has third fluid-discharge tube (13).
4. The apparatus for rectification flash distillation of exhaust gas of a semi-aromatic polyester-polycarbonate copolymer according to claim 1, wherein: and two ends of the cooling coil (9) respectively penetrate through the condensation cover (8) to be provided with a cooling water inlet and a cooling water outlet.
5. The apparatus for rectification flash distillation of exhaust gas of a semi-aromatic polyester-polycarbonate copolymer according to claim 1, wherein: the condensation cover (8) is inverted U-shaped, and the liquid receiving plate (10) is integrally formed into a splayed shape.
6. The tail gas rectification flash apparatus of the semi-aromatic polyester-polycarbonate copolymer according to claim 1, wherein: the outer ends of the flash evaporation kettle (4) and the rectifying tower (7) are provided with a control console (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222226350.2U CN218589700U (en) | 2022-08-23 | 2022-08-23 | Tail gas rectification flash distillation device of semi-aromatic polyester-polycarbonate copolymer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222226350.2U CN218589700U (en) | 2022-08-23 | 2022-08-23 | Tail gas rectification flash distillation device of semi-aromatic polyester-polycarbonate copolymer |
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| Publication Number | Publication Date |
|---|---|
| CN218589700U true CN218589700U (en) | 2023-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222226350.2U Active CN218589700U (en) | 2022-08-23 | 2022-08-23 | Tail gas rectification flash distillation device of semi-aromatic polyester-polycarbonate copolymer |
Country Status (1)
| Country | Link |
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| CN (1) | CN218589700U (en) |
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- 2022-08-23 CN CN202222226350.2U patent/CN218589700U/en active Active
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