CN219922098U - Rectifying device is used in production of chlorotrifluorotoluene - Google Patents
Rectifying device is used in production of chlorotrifluorotoluene Download PDFInfo
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- CN219922098U CN219922098U CN202321350934.9U CN202321350934U CN219922098U CN 219922098 U CN219922098 U CN 219922098U CN 202321350934 U CN202321350934 U CN 202321350934U CN 219922098 U CN219922098 U CN 219922098U
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- rectifying
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- condenser
- tank
- rectifying tower
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- DGRVQOKCSKDWIH-UHFFFAOYSA-N 1-chloro-2-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=CC=CC=C1Cl DGRVQOKCSKDWIH-UHFFFAOYSA-N 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title description 4
- 239000007788 liquid Substances 0.000 claims abstract description 66
- 238000010521 absorption reaction Methods 0.000 claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 34
- 239000002912 waste gas Substances 0.000 claims abstract description 25
- 239000000047 product Substances 0.000 claims abstract description 17
- 239000012043 crude product Substances 0.000 claims abstract description 12
- 238000010992 reflux Methods 0.000 claims description 15
- IGUMWDXKAUEIDE-UHFFFAOYSA-N 2-chloro-1,3,4-trifluoro-5-methylbenzene Chemical compound CC1=CC(F)=C(Cl)C(F)=C1F IGUMWDXKAUEIDE-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 15
- 150000002894 organic compounds Chemical class 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 238000012856 packing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000011364 vaporized material Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Abstract
The utility model discloses a rectifying device for producing para-chlorotrifluorotoluene, which comprises a crude product tank, a rectifying tower, a first condenser, a second condenser, a vacuum buffer tank and a vacuum pump which are sequentially communicated, wherein the first condenser and the second condenser are communicated with a product receiving tank; the second condenser is communicated with an exhaust gas treatment tank; a spiral drainage plate is arranged in the rectifying tower, and a porous air inlet pipe is arranged at the bottom of the rectifying tower; a conical flexible baffle is arranged at the gas outlet of the rectifying tower, and elastic bulges are arranged on the conical flexible baffle; an absorption liquid conveying pipe is arranged in the waste gas treatment tank, and is spiral, and a liquid outlet pipe is communicated with the absorption liquid conveying pipe; the lower part of the waste gas treatment tank is provided with a waste gas conveying pipe, and the absorption liquid conveying pipe is sleeved on the outer side of one end of the waste gas conveying pipe. The rectifying device can collect and treat organic compounds generated in the rectifying process in time, so that the environment is prevented from being polluted, gas and liquid in the device can be fully contacted, and the rectifying efficiency is improved.
Description
Technical Field
The utility model relates to the field of p-chlorotrifluorotoluene production devices, in particular to a rectifying device for p-chlorotrifluorotoluene production.
Background
Para-chlorotrifluorotoluene is a powerful organic refrigerant and an important industrial raw material. During the preparation process, it is often necessary to improve its purity and quality by rectification techniques. The rectification technique is a method for realizing separation and purification by utilizing different volatilities among components. The traditional technology of using a tower plate column and a packing column as distillers is generally adopted in the petrochemical industry, but along with the progress of technology, novel gas-liquid separation equipment is gradually applied to rectification.
In the rectifying process of chlorotrifluorotoluene, a fractionating tower is generally adopted for operation, and according to different technological processes and requirements, the fractionating tower can be divided into a plate fractionating tower, a packing fractionating tower, a separator, a structure with two-in-one packing in the tower and the like. Firstly, in the rectifying process of the chlorotrifluorotoluene, some volatile organic compounds may be discharged, and if the compounds are not timely treated, certain pollution to the environment may be caused; 2. in the rectification process, the rectification efficiency is affected due to insufficient gas-liquid contact, and the product yield is further affected.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: aiming at the defects existing in the prior art, the rectifying device for producing the para-chlorotrifluorotoluene is provided, organic compounds generated in the rectifying process can be timely collected and treated by the rectifying device, the environment pollution is avoided, gas and liquid in the device can be fully contacted, and the rectifying efficiency is improved.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the rectifying device for producing the para-chlorotrifluorotoluene comprises a crude product tank, a rectifying tower, a first condenser, a second condenser, a vacuum buffer tank and a vacuum pump which are sequentially communicated, wherein liquid outlets of the first condenser and the second condenser are communicated with a product receiving tank; the gas outlet of the second condenser is communicated with an exhaust gas treatment tank;
a spiral flow guide plate is arranged in the rectifying tower, and one end of the spiral flow guide plate extends to a rectifying liquid inlet on the rectifying tower; the bottom of the rectifying tower is provided with a porous air inlet pipe communicated with a steam inlet of the rectifying tower; a conical flexible baffle is further arranged at the gas outlet at the top of the rectifying tower, and a plurality of elastic bulges are arranged on the conical flexible baffle;
an absorption liquid conveying pipe communicated with an absorption liquid inlet of the waste gas treatment tank is arranged in the waste gas treatment tank, the absorption liquid conveying pipe is spiral, and a plurality of liquid outlet pipes are communicated with the absorption liquid conveying pipe; the lower part of the waste gas treatment tank is provided with a waste gas conveying pipe, and the absorption liquid conveying pipe is sleeved on the outer side of one end of the waste gas conveying pipe.
As an improvement of the technical scheme, a liquid outlet at the bottom of the rectifying tower is communicated with a rectifying still, and a gas outlet of the rectifying still is communicated with the rectifying tower.
As the optimization of the technical scheme, the rectifying still is provided with a jacket structure, and the jacket is provided with a heat exchange medium inlet and a heat exchange medium outlet.
As an improvement of the technical scheme, the liquid outlets of the first condenser and the second condenser are communicated with a reflux tank, and the liquid outlets of the reflux tank are respectively communicated with the rectifying tower and the product receiving tank.
As a preferable aspect of the above-described aspect, the plurality of liquid outlet pipes are arranged non-parallel.
As the optimization of the technical scheme, a feeding pump is arranged on a connecting pipeline of the crude product tank and the rectifying tower.
As the preferable of the technical scheme, a reflux pump is arranged on the discharge pipeline of the reflux tank.
As a preferable mode of the above technical scheme, a thermometer and a manometer are provided on the rectifying tower.
Due to the adoption of the technical scheme, the utility model has the beneficial effects that:
the utility model provides a rectifying device for producing para-chlorotrifluorotoluene, which comprises a crude product tank, a rectifying tower, a first condenser, a second condenser, a vacuum buffer tank and a vacuum pump which are sequentially communicated, wherein liquid outlets of the first condenser and the second condenser are communicated with a product receiving tank; the gas outlet of the second condenser is communicated with an exhaust gas treatment tank; the p-chlorotrifluorotoluene in the crude product tank is pumped into the rectifying tower through the feed pump to carry out mixed heat exchange with hot steam, and the rectified gas is condensed by the first condenser and the second condenser and then enters the product receiving tank. The vacuum buffer tank in the device reduces the internal pressure of the rectifying tower by partially decompressing the rectifying tower, so that the material is vaporized and sublimated at a lower temperature, and the rectifying effect is more stable and efficient. Meanwhile, the vacuum buffer tank can also buffer pressure fluctuation in the reaction process caused by feed change and the like, so that stable operation of the rectification process is ensured. In addition, the vacuum buffer tank can also avoid the condition that equipment is stopped because the air bubble blocks the pipeline in the rectification process, so that the rectification safety is ensured. The spiral flow guide plate is arranged in the rectifying tower, one end of the spiral flow guide plate extends to the rectifying liquid inlet on the rectifying tower, the bottom of the rectifying tower is provided with the porous air inlet pipe communicated with the steam inlet of the rectifying tower, and the combined arrangement of the spiral flow guide plate and the porous air inlet pipe can effectively improve the contact time of the crude chlorotrifluorotoluene product and steam, effectively improve the heat exchange efficiency and further improve the rectifying efficiency. In order to improve the yield and purity of the product, the conical flexible baffle is further arranged at the air outlet at the top of the rectifying tower, a plurality of elastic protrusions are arranged on the conical flexible baffle, and liquid entrained by gas can be effectively separated out through the combined arrangement of the conical flexible baffle and the elastic protrusions during rectification, so that a good rectifying effect is ensured. An absorption liquid conveying pipe communicated with an absorption liquid inlet of the exhaust gas treatment tank is arranged in the exhaust gas treatment tank, the absorption liquid conveying pipe is spiral, and a plurality of liquid outlet pipes are communicated with the absorption liquid conveying pipe; the lower part of the waste gas treatment tank is provided with a waste gas conveying pipe, and the absorption liquid conveying pipe is sleeved outside one end of the waste gas conveying pipe; the contact efficiency of absorption liquid and waste gas is guaranteed through the arrangement, and further the waste gas can be fully absorbed and treated, and the absorption efficiency of the waste gas is improved.
The liquid outlet at the bottom of the rectifying tower is communicated with the rectifying still, the gas outlet of the rectifying still is communicated with the rectifying tower, and the rectifying tower and the rectifying still are used in combination, so that a good rectifying effect is ensured. The drain pipe non-parallel arrangement of this device has further guaranteed that absorption liquid and waste gas fully contact, improves the absorption efficiency of waste gas.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a schematic view of the internal structure of the rectifying column;
FIG. 3 is an enlarged schematic view of the structure at A;
FIG. 4 is a schematic view of the internal structure of an exhaust treatment tank;
in the figure, 1, a crude product tank; 2. a rectifying tower; 3. a first condenser; 4. a second condenser; 5. a vacuum buffer tank; 6. a vacuum pump; 7. a reflux drum; 8. a product receiving tank; 9. an exhaust gas treatment tank; 10. a feed pump; 11. a reflux pump; 12. a spiral drainage plate; 13. a porous air inlet pipe; 14. a conical flexible baffle; 15. an elastic protrusion; 16. an absorption liquid conveying pipe; 17. a liquid outlet pipe; 18. an exhaust gas delivery pipe; 19. a rectifying still; 20. a jacket; 21. a heat exchange medium inlet; 22. a heat exchange medium outlet; 23. a thermometer; 24. a pressure gauge; 25. a rectification liquid inlet; 26. a reflux inlet; 27. a steam inlet; 28. and an absorption liquid inlet.
Detailed Description
The utility model is further illustrated in the following, in conjunction with the accompanying drawings and examples. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Examples
As shown in fig. 1 to 4, a rectifying device for producing chlorotrifluorotoluene comprises a crude product tank 1, a rectifying tower 2, a first condenser 3, a second condenser 4, a vacuum buffer tank 5 and a vacuum pump 6 which are sequentially communicated, wherein liquid outlets of the first condenser 3 and the second condenser 4 are communicated with a reflux tank 7, and liquid outlets of the reflux tank 7 are respectively communicated with the rectifying tower 2 and a product receiving tank 8; the gas outlet of the second condenser 4 is communicated with an exhaust gas treatment tank 9; a feeding pump 10 is arranged on a connecting pipeline between the crude product tank 1 and the rectifying tower 2; a discharge pipeline of the reflux tank 7 is provided with a reflux pump 11; the p-chlorotrifluorotoluene in the crude product tank 1 is pumped into the rectifying tower 2 through the feed pump 10 to carry out mixed heat exchange with hot steam, and the rectified gas is condensed by the first condenser 3 and the second condenser 4 and then enters the product receiving tank 8. The vacuum buffer tank 5 in the device reduces the internal pressure of the rectifying tower 2 by partially decompressing the rectifying tower so as to enable the material to be vaporized and sublimated at a lower temperature, and the rectifying effect is more stable and efficient. Meanwhile, the vacuum buffer tank 5 can also buffer pressure fluctuation in the reaction process caused by feed change and the like, thereby ensuring stable progress of the rectification process. In addition, the vacuum buffer tank 5 can also avoid the condition that equipment is stopped because the air bubbles block the pipeline in the rectification process, so that the rectification safety is ensured.
In order to improve the rectification effect, a spiral flow guide plate 12 is arranged in a rectification tower 2 of the device, and one end of the spiral flow guide plate 12 extends to a rectification liquid inlet 25 on the rectification tower 2; the bottom of the rectifying tower 2 is provided with a porous air inlet pipe 13 communicated with a steam inlet 27 of the rectifying tower 2; the spiral drainage plate 12 can effectively improve the contact time of the crude chlorotrifluorotoluene product and steam, effectively improve the heat exchange efficiency, and further improve the rectification efficiency. A conical flexible baffle 14 is further arranged at the gas outlet at the top of the rectifying tower 2, and a plurality of elastic bulges 15 are arranged on the conical flexible baffle 14; the combined arrangement of the conical flexible baffle 14 and the elastic bulge 15 effectively separates liquid carried in gas, and the separated liquid enters the rectifying tower 2 again for treatment, so that the rectifying effect is improved, and the purity of the product is improved.
In the rectification process of the chlorotrifluorotoluene crude product, volatile toxic organic matters can be discharged to some extent, and the environment and human body can be influenced to a certain extent, the device pumps the volatile toxic organic matters into the waste gas treatment tank 9 for treatment, an absorption liquid conveying pipe 16 communicated with an absorption liquid inlet 28 of the waste gas treatment tank 9 is arranged in the waste gas treatment tank 9 of the device, the absorption liquid conveying pipe 16 is spiral, and a plurality of liquid outlet pipes 17 are communicated with the absorption liquid conveying pipe 16; the lower part of the exhaust gas treatment tank 9 is provided with an exhaust gas conveying pipe 18, and the absorption liquid conveying pipe 16 is sleeved outside one end of the exhaust gas conveying pipe 18. When the organic gas is treated, the absorption liquid is discharged from the liquid outlet pipe 17 on the spiral absorption liquid conveying pipe 16, and can be fully contacted and absorbed with the organic gas, so that the absorption efficiency of the gas is improved.
Further, a liquid outlet at the bottom of the rectifying tower 2 is communicated with a rectifying still 19, and a gas outlet of the rectifying still 19 is communicated with the rectifying tower 2; the rectifying still 19 is provided with a jacket 20 structure, and the jacket 20 is provided with a heat exchange medium inlet 21 and a heat exchange medium outlet 22. The device adopts the rectification kettle 19 to be used in combination with the rectification tower 2, the bottom liquid of the rectification tower 2 enters the rectification kettle 19 to be heated, the vaporized material enters the rectification tower 2 to be treated again, the rectification effect is effectively improved, and the product quality and the product yield are improved.
Further, the plurality of liquid outlet pipes 17 of the device are arranged in a non-parallel manner, so that the absorption liquid can fully contact with the organic gas, and the absorption efficiency is improved.
Further, the temperature gauge 23 and the pressure gauge 24 are arranged on the rectifying tower 2, and the temperature and the pressure in the rectifying tower 2 can be monitored in real time by the arrangement of the temperature gauge 23 and the pressure gauge 24, so that the safety of the rectifying process is ensured.
Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the utility model as defined in the appended claims.
Claims (8)
1. The rectifying device for producing the chlorotrifluorotoluene is characterized by comprising a crude product tank, a rectifying tower, a first condenser, a second condenser, a vacuum buffer tank and a vacuum pump which are sequentially communicated, wherein liquid outlets of the first condenser and the second condenser are communicated with a product receiving tank; the gas outlet of the second condenser is communicated with an exhaust gas treatment tank;
a spiral flow guide plate is arranged in the rectifying tower, and one end of the spiral flow guide plate extends to a rectifying liquid inlet on the rectifying tower; the bottom of the rectifying tower is provided with a porous air inlet pipe communicated with a steam inlet of the rectifying tower; a conical flexible baffle is further arranged at the gas outlet at the top of the rectifying tower, and a plurality of elastic bulges are arranged on the conical flexible baffle;
an absorption liquid conveying pipe communicated with an absorption liquid inlet of the waste gas treatment tank is arranged in the waste gas treatment tank, the absorption liquid conveying pipe is spiral, and a plurality of liquid outlet pipes are communicated with the absorption liquid conveying pipe; the lower part of the waste gas treatment tank is provided with a waste gas conveying pipe, and the absorption liquid conveying pipe is sleeved on the outer side of one end of the waste gas conveying pipe.
2. The rectifying device for producing p-chlorotrifluorotoluene according to claim 1, wherein a liquid outlet at the bottom of the rectifying tower is communicated with a rectifying still, and a gas outlet of the rectifying still is communicated with the rectifying tower.
3. The rectifying device for producing p-chlorotrifluorotoluene according to claim 2, wherein a jacket is arranged on the rectifying still, and a heat exchange medium inlet and a heat exchange medium outlet are arranged on the jacket.
4. The rectifying device for producing para-chlorotrifluorotoluene according to claim 1, wherein liquid outlets of the first condenser and the second condenser are communicated with a reflux tank, and liquid outlets of the reflux tank are respectively communicated with a rectifying tower and a product receiving tank.
5. The rectifying device for producing chlorotrifluorotoluene according to claim 1, wherein the plurality of liquid outlet pipes are arranged in a non-parallel manner.
6. The rectifying device for producing p-chlorotrifluorotoluene according to claim 1, wherein a feed pump is arranged on a connecting pipeline of the crude product tank and the rectifying tower.
7. The rectifying device for producing chlorotrifluorotoluene according to claim 4, wherein a reflux pump is arranged on a discharge pipeline of the reflux tank.
8. The rectifying device for producing chlorotrifluorotoluene according to claim 1, wherein a thermometer and a pressure gauge are arranged on the rectifying tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321350934.9U CN219922098U (en) | 2023-05-29 | 2023-05-29 | Rectifying device is used in production of chlorotrifluorotoluene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321350934.9U CN219922098U (en) | 2023-05-29 | 2023-05-29 | Rectifying device is used in production of chlorotrifluorotoluene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219922098U true CN219922098U (en) | 2023-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321350934.9U Active CN219922098U (en) | 2023-05-29 | 2023-05-29 | Rectifying device is used in production of chlorotrifluorotoluene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219922098U (en) |
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2023
- 2023-05-29 CN CN202321350934.9U patent/CN219922098U/en active Active
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