CN113304492A - Devolatilization device - Google Patents
Devolatilization device Download PDFInfo
- Publication number
- CN113304492A CN113304492A CN202110761059.2A CN202110761059A CN113304492A CN 113304492 A CN113304492 A CN 113304492A CN 202110761059 A CN202110761059 A CN 202110761059A CN 113304492 A CN113304492 A CN 113304492A
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- Prior art keywords
- distribution pipe
- devolatilizer
- pipe
- jacket
- devolatilization device
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- 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.)
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- 239000000463 material Substances 0.000 claims abstract description 77
- 238000009413 insulation Methods 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 abstract 1
- 239000004793 Polystyrene Substances 0.000 description 8
- 229920002223 polystyrene Polymers 0.000 description 8
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
Abstract
The invention relates to a devolatilization device which comprises a devolatilization device body, wherein the top of the devolatilization device body is provided with a gas phase outlet, the upper part of the devolatilization device body is provided with a material inlet, the bottom of the devolatilization device body is provided with a material outlet, a material distributor is arranged in the devolatilization device body, the material distributor is positioned at the upper part of the devolatilization device body, and the number of the material inlets is two; the material distributor is formed by splicing a plurality of distribution pipes and is in a shape of a Chinese character 'mu', the material distributor is transversely arranged, two feed inlets are arranged on the upper side surface of the material distributor, the two feed inlets are symmetrical about the central axis of the material distributor, and a plurality of discharge outlets are arranged on the lower side surface of the material distributor; the material inlets are connected with the feeding holes in a one-to-one correspondence mode. The distribution pipes are distributed relatively uniformly in the cross section of the cylinder body, so that the sprayed liquid drops are uniformly filled in the space in the cylinder body, local crowding and mutual collision of the liquid drops are not excessively formed, the liquid drops are not increased, the area of a volatilization interface is not excessively reduced, and a good volatilization effect is kept; leaving a rising channel for the gas.
Description
Technical Field
The invention relates to chemical equipment, in particular to a devolatilizer.
Background
Polymerization is one of the most commonly used processes in chemical engineering. It is generally very difficult to continue the conversion after a certain conversion has been reached in the polymerization. Unconverted monomers need to be removed from the polymer to obtain a pure polymer. It is generally desired that the residual monomer content in the final product be not greater than 800 ppm. This process of removing unconverted monomers is known as devolatilization. A small amount of polymer solvent is incidentally removed at the time of devolatilization. There are various conventional devolatilization methods, such as a thermal flash evaporation method, a thermal agitation method, a screw extrusion method, and the like.
Disclosure of Invention
The invention provides a devolatilizer.
The technical scheme of the invention is as follows:
a devolatilization device comprises a devolatilization device body, wherein a gas phase outlet is formed in the top of the devolatilization device body, a material inlet is formed in the upper portion of the devolatilization device body, a material outlet is formed in the bottom of the devolatilization device body, a material distributor is installed in the devolatilization device body, and the material distributor is located on the upper portion of the devolatilization device body; the number of the material inlets is two; the material distributor is formed by splicing a plurality of distribution pipes and is in a shape of a Chinese character 'mu', the material distributor is transversely arranged, two feed inlets are arranged on the upper side surface of the material distributor, the two feed inlets are symmetrical about the central axis of the material distributor, and a plurality of discharge outlets are arranged on the lower side surface of the material distributor; the material inlets are connected with the feeding holes in a one-to-one correspondence mode.
The polymerized material contains polystyrene, styrene and a small amount of ethylbenzene. The material is added from the material inlet in a hot melting state and then is added into the material distributor; the material in the material distributor is sprayed out from each small hole under the action of a certain pressure and is dispersed into fine liquid drops, so that the volatilization interface of the material is increased by tens of times. Styrene and ethylbenzene are light hydrocarbon substances, have a lower vaporization point than polystyrene, and are volatilized from liquid droplets in a gas form. The volatilized gas rises upward through the gaps around the material distribution pipes to the top and flows away from the gas phase outlet. The polystyrene droplets from which the monomer and solvent have been removed are collected downwards to form a pool of liquid polystyrene, the polystyrene in the pool being continuously drawn off from the material outlet.
Considering that the temperature reduction caused by heat dissipation must be prevented when materials are added, because the viscosity is increased due to the temperature reduction of the materials, the devolatilization difficulty is increased; and in order to prevent heat dissipation in order to prevent the polystyrene liquid from adhering to the inner wall of the outlet pipe, blocking the outlet channel, the polystyrene liquid must be kept above a certain temperature; the devolatilization device body is also provided with a heat preservation device; the materials in the material inlet, the material outlet and the devolatilizer body are insulated by the heat insulation device; ensuring that the materials are all below proper degree in the whole devolatilization process.
The distribution pipes are round pipes, the number of the distribution pipes is ten, the distribution pipes are a first distribution pipe, a second distribution pipe, a third distribution pipe and a fourth distribution pipe respectively, the first distribution pipe, the second distribution pipe and the third distribution pipe are two respectively, the fourth distribution pipe is four, the second distribution pipe is symmetrically arranged on two sides of a central line in a horizontal plane, the first distribution pipe is symmetrically arranged on the left side and the right side of the second distribution pipe and is parallel to the second distribution pipe, the third distribution pipe is symmetrically arranged on the front side and the rear side of the second distribution pipe and is vertical to the second distribution pipe, the fourth distribution pipe is symmetrically arranged on four corners of the second distribution pipe, the first distribution pipe, the third distribution pipe and the fourth distribution pipe are connected in series, and two ends of the second distribution pipe are connected with the third distribution pipe respectively; the discharge hole is a dense small hole arranged on the distribution pipe; the feeding holes are in one-to-one correspondence with the center of the arc surface at the upper part of the first distribution pipe.
The dense small holes are positioned on the downward cambered surface of the distribution pipe, and the central angle subtended by the circular arcs is 96 degrees.
The devolatilization device body is formed by connecting an upper end enclosure, a cylinder body and a lower end enclosure.
The heat preservation device comprises a coil pipe, a jacket and a heat tracing half pipe.
The coil pipe is two sets of, and a set of spiral winding is on two material import, for feeding heating coil pipe, and another group of spiral winding is on the material export, for ejection of compact heat preservation coil pipe.
The heat tracing half pipe is spirally wound on the upper end enclosure and the cylinder body, a heat tracing oil flow passage is formed between the heat tracing half pipe and the upper end enclosure as well as between the heat tracing half pipe and the cylinder body, a heat tracing half pipe hot oil inlet is arranged at the inlet of the hot oil flow passage, and a heat tracing half pipe hot oil outlet is arranged at the outlet of the hot oil flow passage.
The jacket is wrapped on the lower sealing head, a jacket space is formed by the jacket and the lower sealing head, and a jacket hot oil inlet and a jacket hot oil outlet are formed in the jacket.
The spiral partition board is arranged in the jacket space, the jacket space is divided into spiral channels through the spiral partition board, and the jacket hot oil inlet and the jacket hot oil outlet are respectively connected with two ports of the spiral channels.
The material inlet is also provided with a heat insulation sleeve, the heat insulation sleeve is wrapped on the feeding heating coil, and heat insulation materials are filled in the heat insulation sleeve.
Four ear seats are uniformly distributed and installed on the middle part of the devolatilizing device body in a circle.
The upper part of the devolatilizer body is also provided with a manhole.
The invention has the advantages of reasonable design, ingenious conception and the following beneficial effects:
1. the material is distributed in a small droplet shape by adopting the distribution pipe with the dense small holes, so that the volatilization interface area is greatly increased, the volatilization effect is greatly enhanced, and the styrene monomer residue and the ethylbenzene residue are greatly reduced. It is possible to ensure that the residual monomer content is less than 300ppm, and at the lowest, less than 150ppm, and thus to obtain a polystyrene product of good quality.
2. The material distributor is designed into a shape like a Chinese character 'mu', so that the distribution pipes are relatively uniformly distributed in the cross section of the cylinder body, the sprayed liquid drops are uniformly filled in the space in the cylinder body, the liquid drops are not excessively crowded locally and mutually collided, the liquid drops are not increased, the area of a volatilization interface is not excessively reduced, and the good volatilization effect is kept. In addition, the distributor is designed to be in a shape of Chinese character 'mu', and a smooth ascending channel is reserved for gas.
Drawings
FIG. 1 is a schematic view of a devolatilizer configuration.
FIG. 2 is a schematic sectional view taken along the line A-A in FIG. 1.
Fig. 3 is a schematic sectional view in the direction of fig. 2C-C.
Fig. 4 is a schematic view showing the first distribution pipe B expanded in the direction.
Fig. 5 is a schematic view showing the second distribution pipe B expanded in the direction.
Fig. 6 is a schematic view showing the third distribution pipe B expanded in the direction.
Fig. 7 is a schematic view showing the fourth distribution pipe B expanded in the direction.
In the figure, a gas phase outlet 1, a material inlet 2, a material outlet 3, a material distributor 4, a first distribution pipe 4-1, a second distribution pipe 4-2, a third distribution pipe 4-3, a fourth distribution pipe 4-4, an upper end socket 5, a cylinder 6, a lower end socket 7, a jacket 8, a heat tracing half pipe 9, a feeding heating coil 10, a discharging heat preservation coil 11, a heat tracing half pipe hot oil inlet 12, a heat tracing half pipe hot oil outlet 13, a jacket hot oil inlet 14, a jacket hot oil outlet 15, a spiral clapboard 16, a heat preservation sleeve 17, an ear seat 18, a manhole 19.
Detailed Description
As shown in fig. 1-7, a devolatilizer comprises a devolatilizer body, wherein a gas phase outlet 1 is arranged at the top of the devolatilizer body, a material inlet 2 is arranged at the upper part of the devolatilizer body, a material outlet 3 is arranged at the bottom of the devolatilizer body, a material distributor 4 is arranged in the devolatilizer body, and the material distributor 4 is positioned at the upper part of the devolatilizer body; the number of the material inlets 2 is two; the material distributor 4 is formed by splicing a plurality of distribution pipes and is in a shape of a Chinese character 'mu', the material distributor 4 is transversely arranged, two feed inlets are arranged on the upper side surface of the material distributor 4, the two feed inlets are symmetrical about the central axis of the material distributor 4, and a plurality of discharge outlets are arranged on the lower side surface of the material distributor; the material inlets 2 are connected with the feeding holes in a one-to-one correspondence manner; the devolatilization device body is also provided with a heat preservation device; the materials in the material inlet 2, the material outlet 3 and the devolatilizer body are insulated by the heat insulation device; the distribution pipes are ten round pipes and are respectively a first distribution pipe 4-1, a second distribution pipe 4-2, a third distribution pipe 4-3 and a fourth distribution pipe 4-4, wherein the first distribution pipe 4-1, the second distribution pipe 4-2, the third distribution pipe 4-3 are respectively two, and the fourth distribution pipe 4-4 are respectively arranged, the second distribution pipe 4-2 is symmetrically arranged on two sides of a central line in a horizontal plane, the first distribution pipe 4-1 is symmetrically arranged on the left side and the right side of the second distribution pipe 4-2 and is parallel to the second distribution pipe 4-2, the third distribution pipe 4-3 is symmetrically arranged on the front side and the rear side of the second distribution pipe 4-2 and is vertical to the second distribution pipe 4-2, the fourth distribution pipe 4-4 is symmetrically arranged on four corners of the second distribution pipe 4-2, and the first distribution pipe 4-1, The third distribution pipe 4-3 and the fourth distribution pipe 4-4 are connected in series, and two ends of the second distribution pipe 4-2 are respectively connected with the third distribution pipe 4-3; the discharge hole is a dense small hole arranged on the distribution pipe; the feeding holes are in one-to-one correspondence to the central position of the arc surface at the upper part of the first distribution pipe 4-1; the dense small holes are positioned on the downward cambered surface of the distribution pipe, and the central angle subtended by the circular arcs is 96 degrees; the devolatilizer body is formed by connecting an upper end enclosure 5, a cylinder body 6 and a lower end enclosure 7; the heat preservation device comprises a coil pipe, a jacket 8 and a heat tracing half pipe 9; the two groups of coil pipes are arranged, one group of coil pipes is spirally wound on the two material inlets 2 and is used as a feeding heating coil pipe 10, and the other group of coil pipes is spirally wound on the material outlet 3 and is used as a discharging heat-insulating coil pipe 11; the heat tracing half pipe 9 is spirally wound on the upper end enclosure 5 and the cylinder body 6, a heat tracing oil flow passage is formed between the heat tracing half pipe 9 and the upper end enclosure 5 as well as between the heat tracing half pipe 9 and the cylinder body 6, a heat tracing half pipe hot oil inlet 12 is arranged at the inlet of the hot oil flow passage, and a heat tracing half pipe hot oil outlet 13 is arranged at the outlet of the hot oil flow passage; the jacket 8 is wrapped on the lower end enclosure 7, a jacket space is formed by the jacket 8 and the lower end enclosure 7, and a jacket hot oil inlet 14 and a jacket hot oil outlet 15 are formed in the jacket 8; a spiral partition plate 16 is arranged in the jacket space, the jacket space is divided into spiral channels through the spiral partition plate 16, and the jacket hot oil inlet 14 and the jacket hot oil outlet 15 are respectively connected with two ports of each spiral channel; the material inlet 2 is also provided with a heat insulation sleeve 17, the heat insulation sleeve 17 is wrapped on the feeding heating coil 10, and heat insulation materials are filled in the heat insulation sleeve 17; four ear seats 18 are uniformly distributed and installed on the middle part of the devolatilization device body in a circle; the upper part of the devolatilizer body is also provided with a manhole 19.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (9)
1. A devolatilization device comprises a devolatilization device body, wherein a gas phase outlet is formed in the top of the devolatilization device body, a material inlet is formed in the upper portion of the devolatilization device body, a material outlet is formed in the bottom of the devolatilization device body, a material distributor is installed in the devolatilization device body, and the material distributor is located on the upper portion of the devolatilization device body; the material distributor is formed by splicing a plurality of distribution pipes and is in a shape of a Chinese character 'mu', the material distributor is transversely arranged, two feed inlets are arranged on the upper side surface of the material distributor, the two feed inlets are symmetrical about the central axis of the material distributor, and a plurality of discharge outlets are arranged on the lower side surface of the material distributor; the material inlets are connected with the feeding holes in a one-to-one correspondence manner;
the devolatilizer body is also provided with a heat preservation device; the materials in the material inlet, the material outlet and the devolatilization device body are insulated through the heat insulation device.
2. The devolatilizer of claim 1 wherein the distribution pipes are round pipes, ten in number, namely a first distribution pipe, a second distribution pipe, a third distribution pipe and a fourth distribution pipe, wherein the first distribution pipe, the second distribution pipe and the third distribution pipe are two and four respectively, the second distribution pipe is symmetrically arranged on two sides of a central line in a horizontal plane, the first distribution pipe is symmetrically arranged on the left and right sides of the second distribution pipe and is parallel to the second distribution pipe, the third distribution pipe is symmetrically arranged on the front and back sides of the second distribution pipe and is perpendicular to the second distribution pipe, the fourth distribution pipe is symmetrically arranged at the four corners of the second distribution pipe, the first distribution pipe, the third distribution pipe and the fourth distribution pipe are connected in series, and two ends of the second distribution pipe are connected to the third distribution pipe respectively; the discharge hole is a dense small hole arranged on the distribution pipe; the feeding holes are in one-to-one correspondence with the center of the arc surface at the upper part of the first distribution pipe.
3. A devolatilizer as claimed in claim 2 in which said dense array of small holes is located in a downwardly directed arc of distribution tubes subtending a central angle of 96 °.
4. The devolatilizer of claim 1 wherein said devolatilizer body is comprised of an upper head, a barrel, and a lower head connected together.
5. A devolatilizer as claimed in claim 3 wherein said insulation means comprises coiled tubing, jacketed tubing, heat tracing half tubing;
the two groups of coil pipes are arranged, one group of coil pipes is spirally wound on the two material inlets and is used as a feeding heating coil pipe, and the other group of coil pipes is spirally wound on the material outlet and is used as a discharging heat-insulating coil pipe;
the heat tracing half pipe is spirally wound on the upper end enclosure and the cylinder body, a heat tracing oil flow passage is formed between the heat tracing half pipe and the upper end enclosure as well as between the heat tracing half pipe and the cylinder body, a heat tracing half pipe hot oil inlet is arranged at the inlet of the hot oil flow passage, and a heat tracing half pipe hot oil outlet is arranged at the outlet of the hot oil flow passage;
the jacket is wrapped on the lower sealing head, a jacket space is formed by the jacket and the lower sealing head, and a jacket hot oil inlet and a jacket hot oil outlet are formed in the jacket.
6. The devolatilizer as claimed in claim 5, wherein a spiral partition is installed in the jacket space, the jacket space is divided into spiral passages by the spiral partition, and the jacket hot oil inlet and the jacket hot oil outlet are respectively connected with two ports of the spiral passages.
7. The devolatilizer as claimed in claim 5 wherein the feed inlet is further provided with a thermal insulating jacket which is wrapped around the feed heating coil and filled with thermal insulating material.
8. The devolatilizer as claimed in claim 1 wherein four ear mounts are evenly distributed around the circumference of the middle of the devolatilizer body.
9. The devolatilizer as claimed in claim 1 wherein a manhole is further provided in the upper portion of the devolatilizer body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110761059.2A CN113304492A (en) | 2021-07-06 | 2021-07-06 | Devolatilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110761059.2A CN113304492A (en) | 2021-07-06 | 2021-07-06 | Devolatilization device |
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| Publication Number | Publication Date |
|---|---|
| CN113304492A true CN113304492A (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110761059.2A Pending CN113304492A (en) | 2021-07-06 | 2021-07-06 | Devolatilization device |
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| Country | Link |
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| CN (1) | CN113304492A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849255A (en) * | 2022-04-21 | 2022-08-05 | 广东寰球广业工程有限公司 | Novel devolatilization device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167772A (en) * | 1997-05-22 | 1997-12-17 | 北京燕山石油化工公司研究院 | Method and apparatus for removing residual volatile component from polymer system |
| CN207981103U (en) * | 2018-01-18 | 2018-10-19 | 惠生工程（中国）有限公司 | A kind of fluid distributor |
| CN210180086U (en) * | 2019-03-27 | 2020-03-24 | 滨州市龙腾机械有限公司 | Feather powder drying-machine |
| CN215232159U (en) * | 2021-07-06 | 2021-12-21 | 江苏永大化工机械有限公司 | Devolatilization device |
-
2021
- 2021-07-06 CN CN202110761059.2A patent/CN113304492A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167772A (en) * | 1997-05-22 | 1997-12-17 | 北京燕山石油化工公司研究院 | Method and apparatus for removing residual volatile component from polymer system |
| CN207981103U (en) * | 2018-01-18 | 2018-10-19 | 惠生工程（中国）有限公司 | A kind of fluid distributor |
| CN210180086U (en) * | 2019-03-27 | 2020-03-24 | 滨州市龙腾机械有限公司 | Feather powder drying-machine |
| CN215232159U (en) * | 2021-07-06 | 2021-12-21 | 江苏永大化工机械有限公司 | Devolatilization device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849255A (en) * | 2022-04-21 | 2022-08-05 | 广东寰球广业工程有限公司 | Novel devolatilization device |
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