CN220276325U - Phthalic anhydride recovery unit - Google Patents
Phthalic anhydride recovery unit Download PDFInfo
- Publication number
- CN220276325U CN220276325U CN202321465405.3U CN202321465405U CN220276325U CN 220276325 U CN220276325 U CN 220276325U CN 202321465405 U CN202321465405 U CN 202321465405U CN 220276325 U CN220276325 U CN 220276325U
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- CN
- China
- Prior art keywords
- tower
- phthalic anhydride
- distillation
- pipeline
- condensing
- Prior art date
- 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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- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 title claims abstract description 41
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- 238000004821 distillation Methods 0.000 claims abstract description 51
- 238000009833 condensation Methods 0.000 claims abstract description 18
- 230000005494 condensation Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 4
- 239000000523 sample Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model relates to a phthalic anhydride recovery device, which comprises a distillation kettle (1), a distillation tower (2) and a condensation tower (3), wherein the distillation kettle (1) is connected with the distillation tower (2) through a pipeline, the top of the distillation tower (2) is connected with the bottom of the condensation tower (3) through a pipeline, a reboiler (4) is arranged at the bottom of the distillation tower (2), the top of the condensation tower (3) is connected with a vacuum pump (5) through a pipeline, and a phthalic anhydride collecting tank (6) is arranged at the bottom of the condensation tower (3). The condensing tower top of the phthalic anhydride recovery device is provided with the vacuumizing device, and heavy components at the tower bottom of the distillation tower enter the heat exchanger to perform energy recovery, so that the phthalic anhydride is effectively recovered, the energy utilization efficiency is improved, and the energy waste is reduced. The utility model has the advantages of ingenious structural design, high energy utilization rate, high phthalic anhydride recovery rate and the like.
Description
Technical Field
The utility model relates to the technical field of chemical equipment, in particular to a phthalic anhydride recovery device.
Background
The crude phthalic anhydride produced by the oxidation reaction contains many impurities, and the crude phthalic anhydride is refined by rectification, so that the heavy component of about 0.7 percent (wt%) of the feeding amount must be discharged from the bottom of the tower to ensure the product quality of the phthalic anhydride. The discharged heavy component contains 60% -70% phthalic anhydride, and about 0.5 ton of phthalic anhydride is discharged along with the heavy component. The discharged heavy components are directly used as dangerous waste in the original process, so that part of finished phthalic anhydride is lost, the amount of dangerous waste is increased, the cost for disposing the dangerous waste is increased, and the burden and the pressure of environmental protection are increased.
The existing phthalic anhydride rectifying tower is not provided with a phthalic anhydride recovery device, so that phthalic anhydride in heavy components is wasted. The utility model designs a phthalic anhydride recovery device aiming at the problems.
Disclosure of Invention
In order to solve the problems, the utility model discloses a phthalic anhydride recovery device, which comprises the following specific technical scheme:
the utility model provides a phthalic anhydride recovery unit, includes stills, distillation column, condensing tower, the stills pass through the pipeline and be connected with the distillation column, the top of distillation column pass through the pipeline and be connected with the bottom of condensing tower, the bottom of distillation column install the reboiler, the top of condensing tower pass through the pipeline and be connected with the vacuum pump, the bottom of condensing tower be provided with phthalic anhydride collecting tank.
Further, the bottom of the distillation tower is connected with a heat exchanger through a pipeline, and the heat exchanger is connected with an inlet of the distillation kettle through a pipeline.
Further, a vacuum gauge is arranged at the top of the distillation tower, and a temperature detection probe is arranged at the joint of the distillation tower and the cooling tower.
Further, a plurality of layers of tower plates are arranged in the distillation tower, and an insulating layer is arranged on the outer wall of the distillation tower.
Further, the condensation tower internally mounted have a plurality of spiral condensation pipelines, a plurality of spiral condensation pipelines all are connected with the trunk line.
Further, the outer wall of the condensing tower is provided with an insulating layer to prevent heat exchange with the outside, so that the condensing efficiency of the condensing tower is reduced.
In the working process, the heavy components from the phthalic anhydride distillation tower enter a distillation kettle for preheating, then enter the distillation tower for negative pressure distillation, the vaporized components enter a condensing tower, and the vaporized components enter a phthalic anhydride collecting tank after condensation; the heavy components at the bottom preheat the liquid entering the distillation still through the heat exchanger, realize heat recovery, then discharge, and treat the waste liquid.
The beneficial effects of the utility model are as follows: the condensing tower top of the phthalic anhydride recovery device is provided with the vacuumizing device, and heavy components at the tower bottom of the distillation tower enter the heat exchanger to perform energy recovery, so that the phthalic anhydride is effectively recovered, the energy utilization efficiency is improved, and the energy waste is reduced. The utility model has the advantages of ingenious structural design, high energy utilization rate, high phthalic anhydride recovery rate and the like.
Drawings
FIG. 1 is a schematic diagram of a phthalic anhydride recovering apparatus according to the present utility model.
List of reference numerals: the device comprises a 1-distillation kettle, a 2-distillation tower, a 201-vacuum meter, 202-tower plates, a 3-condensation tower, 301-spiral condensation pipelines, 302-main pipelines, 4-reboilers, 5-vacuum pumps, a 6-phthalic anhydride collecting tank, 8-heat exchangers, 9-temperature detection probes and 10-heat preservation layers.
Detailed Description
The present utility model is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the utility model and not limiting the scope of the utility model. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
Example 1
With reference to figure 1 of the drawings,
the utility model provides a phthalic anhydride recovery unit, includes stills 1, distillation column 2, condensing tower 3, and stills 1 is connected with distillation column 2 through the pipeline, and the top of distillation column 2 is connected with the bottom of condensing tower 3 through the pipeline, and reboiler 4 is installed to the bottom of distillation column 2, and the top of condensing tower 3 is connected with vacuum pump 5 through the pipeline, and the bottom of condensing tower 3 is provided with phthalic anhydride collection tank 6.
Further, the bottom of the distillation column 2 is connected to a heat exchanger 8 through a pipe, and the heat exchanger 8 is connected to an inlet of the distillation still 1 through a pipe.
Further, a vacuum gauge 201 is installed on the top of the distillation tower 2, and a temperature detection probe 9 is arranged at the joint of the distillation tower 2 and the cooling tower 3.
Further, a plurality of layers of tower plates 202 are arranged in the distillation tower 2, and an insulating layer 10 is arranged on the outer wall of the distillation tower 2.
Further, the condensation tower 3 is internally provided with a plurality of spiral condensation pipes 301, and the plurality of spiral condensation pipes 301 are connected with the main pipe 302.
Further, the heat insulation layer 10 is arranged on the outer wall of the condensing tower 3 to prevent heat exchange with the outside, thereby reducing the condensing efficiency of the condensing tower.
In the working process, the heavy components from the phthalic anhydride distillation tower enter a distillation kettle for preheating, then enter the distillation tower for negative pressure distillation, the vaporized components enter a condensing tower, and the vaporized components enter a phthalic anhydride collecting tank after condensation; the heavy components at the bottom preheat the liquid entering the distillation still through the heat exchanger, realize heat recovery, then discharge, and treat the waste liquid.
The condensing tower top of the phthalic anhydride recovery device is provided with the vacuumizing device, and heavy components at the tower bottom of the distillation tower enter the heat exchanger to perform energy recovery, so that the phthalic anhydride is effectively recovered, the energy utilization efficiency is improved, and the energy waste is reduced. Therefore, the device has the advantages of ingenious structural design, high energy utilization rate, high phthalic anhydride recovery rate and the like.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features.
Claims (6)
1. The utility model provides a phthalic anhydride recovery unit, its characterized in that, includes stills (1), distillation column (2), condensing tower (3), stills (1) be connected with distillation column (2) through the pipeline, the top of distillation column (2) be connected with the bottom of condensing tower (3) through the pipeline, the bottom of distillation column (2) install reboiler (4), the top of condensing tower (3) be connected with vacuum pump (5) through the pipeline, the bottom of condensing tower (3) be provided with phthalic anhydride collection tank (6).
2. The phthalic anhydride recovery device according to claim 1, wherein the bottom of the distillation tower (2) is connected with a heat exchanger (8) through a pipeline, and the heat exchanger (8) is connected with an inlet of the distillation kettle (1) through a pipeline.
3. The phthalic anhydride recovery device according to claim 1, wherein a vacuum gauge (201) is installed at the top of the distillation tower (2), and a temperature detection probe (9) is arranged at the joint of the distillation tower (2) and the condensation tower (3).
4. The phthalic anhydride recovery device according to claim 1, wherein a plurality of layers of tower plates (202) are arranged in the distillation tower (2), and an insulating layer (10) is arranged on the outer wall of the distillation tower (2).
5. Phthalic anhydride recovery device according to claim 1, characterized in that the condensation tower (3) is internally provided with a plurality of spiral condensation pipes (301), and the plurality of spiral condensation pipes (301) are all connected with the main pipe (302).
6. The phthalic anhydride recovery device according to claim 1, wherein an insulation layer (10) is provided on the outer wall of the condensing tower (3) to prevent heat exchange with the outside, thereby reducing the condensing efficiency of the condensing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321465405.3U CN220276325U (en) | 2023-06-09 | 2023-06-09 | Phthalic anhydride recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321465405.3U CN220276325U (en) | 2023-06-09 | 2023-06-09 | Phthalic anhydride recovery unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220276325U true CN220276325U (en) | 2024-01-02 |
Family
ID=89340991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321465405.3U Active CN220276325U (en) | 2023-06-09 | 2023-06-09 | Phthalic anhydride recovery unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220276325U (en) |
-
2023
- 2023-06-09 CN CN202321465405.3U patent/CN220276325U/en active Active
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