CN220573463U - Esterification reaction cauldron pressure release processing apparatus - Google Patents
Esterification reaction cauldron pressure release processing apparatus Download PDFInfo
- Publication number
- CN220573463U CN220573463U CN202321992988.5U CN202321992988U CN220573463U CN 220573463 U CN220573463 U CN 220573463U CN 202321992988 U CN202321992988 U CN 202321992988U CN 220573463 U CN220573463 U CN 220573463U
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- China
- Prior art keywords
- esterification reaction
- reaction kettle
- pressure relief
- phase pipeline
- pressure release
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- 238000005886 esterification reaction Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000032050 esterification Effects 0.000 claims abstract description 7
- 238000007086 side reaction Methods 0.000 claims abstract description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 64
- 239000007789 gas Substances 0.000 claims description 31
- 239000012071 phase Substances 0.000 claims description 31
- 239000000498 cooling water Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 239000007792 gaseous phase Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000009833 condensation Methods 0.000 abstract description 2
- 230000005494 condensation Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 210000003437 trachea Anatomy 0.000 description 7
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The utility model discloses a pressure relief treatment device for an esterification reaction kettle, which comprises the esterification reaction kettle, a process tower and a gas phase pipeline, wherein a pneumatic valve is arranged on the gas phase pipeline, a filter device is arranged on the gas phase pipeline between the pneumatic valve and the esterification reaction kettle, an oligomer which is discharged outwards in the esterification reaction kettle through esterification side reaction is filtered by the filter device, one side of the esterification reaction kettle is provided with a pressure relief device connected through a discharge air pipe, a switch valve is arranged on the discharge air pipe between the esterification reaction kettle and the pressure relief device, and when the filter device needs to be replaced and cleaned, mixed steam which is required to be discharged outwards in the esterification reaction kettle enters the pressure relief device through the discharge air pipe for pressure relief. The gas phase pipeline blocking phenomenon can be improved, and mixed steam in the reaction kettle can be led out for condensation under the condition of no shutdown maintenance.
Description
Technical Field
The utility model relates to the technical field of esterification reaction kettles, in particular to a pressure relief treatment device of an esterification reaction kettle.
Background
At present, in the production process of polyester fibers, refined terephthalic acid (PTA) and Ethylene Glycol (EG) are subjected to esterification and polycondensation to form polyethylene terephthalate (PET). In the esterification reaction process, EG and water evaporated from an esterification reaction kettle are required to be sent into a process tower through a gas phase pipeline, the process tower separates water vapor from excessive ethylene glycol by continuously heating by utilizing the difference of boiling points of water (boiling point 100 ℃) and EG (boiling point 197.3 ℃), the water vapor is evaporated from the top of the tower and is utilized by waste heat, and EG flowing out from the bottom of the tower returns to the reactor for recycling.
However, in the prior art, oligomers are generated due to esterification side reactions, wherein a part of the oligomers enter the process tower together with EG and water through a gas phase pipeline, and the oligomers attached to the pipe wall of the gas phase pipeline are more and more increased due to long-time operation of the device, so that the gas phase pipeline becomes thin and even blocked. If the gas phase pipeline is blocked, EG and water cannot enter the process tower, so that the pressure of the reaction kettle is high, the esterification reaction and the subsequent production are affected, and when serious, the production is stopped for treatment, so that the gas phase pipeline of the esterification reaction kettle is required to be improved, and the period of the gas phase pipeline blocking is reduced or prolonged.
Disclosure of Invention
In order to solve some or some technical problems existing in the prior art, the purpose of the application is to provide an esterification reaction kettle pressure relief treatment device, which can improve the gas phase pipeline blocking phenomenon, and meanwhile, can lead out mixed steam in the reaction kettle for condensation under the condition of no shutdown maintenance.
In order to solve the above-mentioned existing technical problem, this application adopts following technical scheme to realize:
the utility model provides an esterification reaction cauldron pressure release processing apparatus, includes esterification reaction cauldron, process tower and gaseous phase pipeline, be equipped with the pneumatic valve on the gaseous phase pipeline, the pneumatic valve with be equipped with filter equipment on the gaseous phase pipeline between the esterification reaction cauldron, outwards exhaust oligomer passes through in the esterification reaction cauldron esterification side reaction filter through filter equipment, one side of esterification reaction cauldron is equipped with the pressure release device who connects through the ejection of compact trachea, esterification reaction cauldron with be equipped with the ooff valve on the ejection of compact trachea between the pressure release device, filter equipment needs to change when wasing, outside exhaust mixed steam is passed through in the esterification reaction cauldron the ejection of compact trachea gets into carry out the pressure release in the pressure release device.
Preferably, the pressure relief device comprises a tubular heat exchanger, a feed inlet, a condensate outlet, a cooling water inlet and a cooling water outlet which are arranged on the tubular heat exchanger, wherein the feed inlet is connected with the discharge air pipe, and mixed steam entering from the feed inlet is discharged from the condensate outlet after being cooled by the tubular heat exchanger.
Preferably, the other end of the condensate outlet is provided with a glycol collecting tank, and the mixed steam cooled by the pressure relief device is conveyed into the process tower again through the glycol collecting tank.
Preferably, the feeding port is connected with the discharging air pipe through a three-way valve, and a pressure gauge is arranged on one port of the three-way valve.
Preferably, one end of the three-way valve is provided with an adjusting ball valve, and the feeding port is communicated with the three-way valve through the adjusting ball valve.
Preferably, both ends of the filtering device are respectively connected with the gas phase pipeline in series through a stop valve.
Preferably, the filter screen in the filter device is an 80-mesh stainless steel metal filter screen.
Compared with the prior art, the utility model has the beneficial effects that:
1. as the gas phase pipeline between the pneumatic valve and the esterification reaction kettle is provided with the filtering device, the oligomer in the mixed steam can be filtered through the filtering device, so that the gas phase pipeline is prevented from being blocked, and the blocking phenomenon in the gas phase pipeline is effectively improved.
2. When filter equipment appears blocking phenomenon in long-term use, can carry out the pressure release through pressure release device to the outside exhaust mixed steam in the esterification reaction cauldron to make esterification reaction cauldron change or clear up filter equipment under the circumstances of not stopping maintenance, thereby effectually solved after the gas phase line knot is stifled, will lead to EG and water unable entering process tower, lead to reation kettle pressure to be high, and then influence esterification reaction and follow-up production's problem, realized the esterification reaction cauldron internal pressure stability of not stopping work under the condition that the gas phase pipeline stops outside air feed, reduced the possibility that the pressure that leads to the fact after the gas phase line knot of esterification reaction cauldron is stifled was stopped to stop maintenance.
Drawings
FIG. 1 is a schematic structural diagram of embodiment 1 of the present utility model;
FIG. 2 is a schematic structural diagram of embodiment 2 of the present utility model;
in the figure: 1. an esterification reaction kettle; 2. a switch valve; 3. a stop valve; 4. a filtering device; 5. a pneumatic valve; 6. a gas phase line; 7. a discharge air pipe; 8. a process tower; 9. a pressure gauge; 10. a cooling water outlet; 11. a pressure relief device; 12. a condensate outlet; 13. a tubular heat exchanger; 14. a cooling water inlet; 15. a feed inlet; 16. a ball-saving valve; 17. a three-way valve; 18. a glycol collection tank.
Detailed Description
The present application will be further described with reference to the drawings and detailed description, which should be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
In the description of the present application, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like in this application are used for distinguishing between similar objects and not for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
Example 1:
the utility model provides an esterification reaction kettle pressure release processing apparatus, includes esterification reaction kettle 1, process tower 8 and gaseous phase pipeline 6, be equipped with pneumatic valve 5 on the gaseous phase pipeline 6, pneumatic valve 5 with be equipped with filter equipment 4 on the gaseous phase pipeline 6 between the esterification reaction kettle 1, outwards discharged oligomer through esterification side reaction in the esterification reaction kettle 1 passes through filter equipment 4 filters, one side of esterification reaction kettle 1 is equipped with the pressure release device 11 that connects through ejection of compact trachea 7, esterification reaction kettle 1 with be equipped with ooff valve 2 on the ejection of compact trachea 7 between the pressure release device 11, when filter equipment 4 needs to be changed the washing, the outside mixed steam that needs in the esterification reaction kettle 1 passes through ejection of compact trachea 7 gets into in the pressure release device 11 is released.
In the actual working process, the switch valve 2 is in a closed state, the pneumatic valve 5 is in an open state, EG, water and other mixed steam evaporated in the esterification reaction kettle 1 is sent to the process tower 8 through the gas phase pipeline 6, and in the process of conveying the mixed steam, as the gas phase pipeline 6 between the pneumatic valve 5 and the esterification reaction kettle 1 is provided with the filter device 4, the oligomer in the mixed steam can be filtered through the filter device 4, so that the gas phase pipeline 6 is prevented from being blocked, and the blocking phenomenon in the gas phase pipeline 6 is effectively improved. When the filter device 4 becomes clogged during long-term use, for example: when the valve position of the pneumatic valve 5 is increased to 60% from 30% of the opening degree under the normal condition, the filter screen in the filter device 4 is blocked and needs to be cleaned or replaced, at the moment, only the gas supply of the gas phase pipeline 6 is needed to be cut off, meanwhile, the switch valve 2 and the pressure relief device 11 are opened, and the mixed steam which needs to be discharged outwards in the esterification reaction kettle 1 can enter the pressure relief device 11 through the discharge gas pipe 7 to be decompressed, so that the mixed steam in the esterification reaction kettle 1 is led out to be condensed under the condition of maintenance without stopping, cleaning or replacing of the filter device 4 is realized, after the filter device 4 is cleaned or replaced, the switch valve 2 is closed, the mixed steam is conveyed into the process tower 8 again through the gas phase pipeline 6, thereby effectively solving the problems that EG and water cannot enter the process tower 8 after the gas phase pipeline 6 is blocked, the pressure of the reaction kettle is high, the esterification reaction kettle is affected, the pressure of the esterification reaction kettle is stable under the condition that the gas phase pipeline 6 stops to be supplied outwards, and the pressure of the esterification reaction kettle 1 is stopped to be stopped, and the possibility of stopping the maintenance after the pressure of the gas phase pipeline 6 is blocked is reduced.
The pressure relief device 11 comprises a tubular heat exchanger 13, a feed inlet 15, a condensate outlet 12, a cooling water inlet 14 and a cooling water outlet 10 which are arranged on the tubular heat exchanger 13, wherein the feed inlet 15 is connected with the discharge air pipe 7, and mixed steam entering from the feed inlet 15 is discharged from the condensate outlet 12 after being cooled by the tubular heat exchanger 13.
When the mixed steam discharged through the discharge air pipe 7 is treated through the pressure relief device 11, the mixed steam enters the tubular heat exchanger 13 through the feed inlet 15, meanwhile, cold water is injected into the cooling water inlet 14 to cool the mixed steam in the tubular heat exchanger 13 into mixed liquid, the injected cold water is discharged from the cooling water outlet 10 after heat exchange, the mixed liquid is discharged outwards from the condensate outlet 12, and the pressure in the esterification reaction kettle 1 can be effectively kept stable by adopting a pressure relief treatment method.
Still further improvement is, feed inlet 15 with discharge trachea 7 passes through three-way valve 17 to be connected, be equipped with manometer 9 on one port of three-way valve 17, one end of three-way valve 17 is equipped with regulation ball valve 16, feed inlet 15 passes through regulation ball valve 16 with three-way valve 17 intercommunication.
Through the three-way valve 17 connection, the structure is simpler, and is more convenient to have manometer 9's installation moreover, can also detect phase place exhaust pressure in real time through manometer 9, is convenient for to the control of exhaust mixed steam volume, simultaneously, can control the mixed steam volume that gets into in the tubular heat exchanger 13 through adjusting ball valve 16 in the use, keeps esterification reaction cauldron 1 internal pressure steady in reasonable range.
When the two esterification reaction kettles 1 need to be decompressed at the same time, the two esterification reaction kettles 1 can share one decompression device 11, wherein the discharge air pipes 7 of the two esterification reaction kettles 1 can be connected through a three-way valve 17 or a multi-way valve.
Further improved is that two ends of the filtering device 4 are respectively connected with the gas phase pipeline 6 in series through a stop valve 3; the filter screen in the filter device 4 adopts a stainless steel metal filter screen with 80 meshes.
When the filtering device 4 needs to be replaced or cleaned, the closing of the gas phase pipelines 6 at the two ends can be realized only by closing the stop valve 3, so that the filtering device 4 is convenient to disassemble and assemble, the filter screen in the filtering device 4 adopts a stainless steel metal filter screen with 80 meshes, the service life is longer, meanwhile, the oligomer can be effectively filtered, and EG and water can enter the process tower 8 through the gas phase pipelines 6.
Example 2:
in a further modification of the embodiment 1, as shown in fig. 2, a glycol collecting tank 18 is disposed at the other end of the condensate outlet 12, and the mixed steam cooled by the pressure relief device 11 is conveyed into the process tower 8 again through the glycol collecting tank 18.
Since there is no extra interface on the process tower 8, but the process tower is communicated with the ethylene glycol collecting tank 18, the condensate outlet 12 of the pressure relief device 11 is communicated with the ethylene glycol collecting tank 18, and when the mixed liquid is injected into the ethylene glycol collecting tank 18, the mixed liquid can be injected into the process tower 8 again through the ethylene glycol collecting tank 18 for separation, so that circulation is realized.
The above embodiments are only preferred embodiments of the present application, and the scope of the present application is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present application are intended to be within the scope of the present application.
Claims (7)
1. The utility model provides an esterification reaction cauldron pressure release processing apparatus, includes esterification reaction cauldron (1), process tower (8) and gaseous phase pipeline (6), be equipped with pneumatic valve (5), its characterized in that on gaseous phase pipeline (6): the novel esterification reaction kettle is characterized in that a filter device (4) is arranged on a gas-phase pipeline (6) between the pneumatic valve (5) and the esterification reaction kettle (1), an oligomer which is discharged outwards through an esterification side reaction in the esterification reaction kettle (1) is filtered by the filter device (4), one side of the esterification reaction kettle (1) is provided with a pressure relief device (11) connected through a discharge air pipe (7), a switch valve (2) is arranged on the discharge air pipe (7) between the esterification reaction kettle (1) and the pressure relief device (11), and when the filter device (4) needs to be replaced and cleaned, mixed steam which is required to be discharged outwards in the esterification reaction kettle (1) enters the pressure relief device (11) through the discharge air pipe (7) for pressure relief.
2. The esterification reaction kettle pressure release processing device according to claim 1, wherein: the pressure relief device (11) comprises a tubular heat exchanger (13), a feed inlet (15) arranged on the tubular heat exchanger (13), a condensate outlet (12), a cooling water inlet (14) and a cooling water outlet (10), wherein the feed inlet (15) is connected with the discharge air pipe (7), and mixed steam entering from the feed inlet (15) is cooled by the tubular heat exchanger (13) and then discharged from the condensate outlet (12).
3. The esterification reaction kettle pressure release processing device according to claim 2, wherein: the feeding port (15) is connected with the discharging air pipe (7) through a three-way valve (17), and a pressure gauge (9) is arranged on one port of the three-way valve (17).
4. The esterification reactor pressure release processing apparatus according to claim 3, wherein: one end of the three-way valve (17) is provided with an adjusting ball valve (16), and the feeding port (15) is communicated with the three-way valve (17) through the adjusting ball valve (16).
5. The esterification reaction kettle pressure release processing device according to claim 1, wherein: the two ends of the filtering device (4) are respectively connected with the gas phase pipeline (6) in series through the stop valve (3).
6. The esterification reaction kettle pressure release processing device according to claim 5, wherein: the filter screen in the filter device (4) adopts a stainless steel metal filter screen with 80 meshes.
7. The esterification reaction kettle pressure release treatment device according to any one of claims 2 to 4, wherein: the other end of the condensate outlet (12) is provided with an ethylene glycol collecting tank (18), and the mixed steam cooled by the pressure relief device (11) is conveyed into the process tower (8) again through the ethylene glycol collecting tank (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321992988.5U CN220573463U (en) | 2023-07-25 | 2023-07-25 | Esterification reaction cauldron pressure release processing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321992988.5U CN220573463U (en) | 2023-07-25 | 2023-07-25 | Esterification reaction cauldron pressure release processing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220573463U true CN220573463U (en) | 2024-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321992988.5U Active CN220573463U (en) | 2023-07-25 | 2023-07-25 | Esterification reaction cauldron pressure release processing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220573463U (en) |
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2023
- 2023-07-25 CN CN202321992988.5U patent/CN220573463U/en active Active
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