CN220360726U - System for preventing hydration catalyst from entering cyclohexanol rectifying tower - Google Patents
System for preventing hydration catalyst from entering cyclohexanol rectifying tower Download PDFInfo
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- CN220360726U CN220360726U CN202321587645.0U CN202321587645U CN220360726U CN 220360726 U CN220360726 U CN 220360726U CN 202321587645 U CN202321587645 U CN 202321587645U CN 220360726 U CN220360726 U CN 220360726U
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- cyclohexanol
- pipeline
- tower
- rectifying tower
- outlet
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- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 title claims abstract description 219
- 239000003054 catalyst Substances 0.000 title claims abstract description 34
- 238000006703 hydration reaction Methods 0.000 title claims abstract description 33
- 230000036571 hydration Effects 0.000 title claims abstract description 28
- 238000010992 reflux Methods 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- HGCIXCUEYOPUTN-UHFFFAOYSA-N cyclohexene Chemical compound C1CCC=CC1 HGCIXCUEYOPUTN-UHFFFAOYSA-N 0.000 abstract description 22
- 239000000047 product Substances 0.000 abstract description 10
- 239000007795 chemical reaction product Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 4
- 238000009835 boiling Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a system for preventing a hydration catalyst from entering a cyclohexanol rectifying tower, which aims at the problem that a cyclohexanol product has a low boiling point substance exceeding standard caused by the generation of cyclohexene due to the fact that a certain amount of hydration catalyst possibly exists in a product oil component coming out of a cyclohexanol rectifying tower kettle when a reaction product at the cyclohexanol separating tower kettle enters the cyclohexanol rectifying tower after being evaporated by a pump and a subsequent feeding evaporator.
Description
Technical Field
The utility model belongs to the field of industrial wastewater treatment and resource recycling, and particularly relates to a system for preventing a hydration catalyst from entering a cyclohexanol rectifying tower.
Background
The manufacture of cyclohexanol is an extremely important process in the nylon industry. At present, most domestic devices for preparing cyclohexanol use benzene to prepare cyclohexene through partial hydrogenation, and cyclohexene and water are subjected to hydration reaction to prepare cyclohexanol, and the hydrogenation and hydration processes are continuous phases based on water phases, so that the method has remarkable advantages in environmental protection, safety and cost. The cyclohexene reacts with water to form cyclohexene, so that the conversion rate of the reaction is not very high, generally about 10%, and the cyclohexanol can generate the cyclohexene through the reversible reaction in the presence of a hydration catalyst, so that the low-boiling-point substances in the cyclohexanol product are influenced to be out of standard, and the product is disqualified. In the cyclohexanol production device, the hydration catalyst from the cyclohexanol separating tower in the original process enters the cyclohexanol rectifying tower, and this results in the reversible reaction of cyclohexanol to produce cyclohexene, resulting in the over standard low boiling matter in the cyclohexanol product. How to avoid the situation that the cyclohexanol generates reversible reaction due to the hydration catalyst in the cyclohexanol rectifying tower and finally leads to the exceeding of low-boiling-point substances in the cyclohexanol product is significant for continuous production of the device and energy saving and consumption reduction.
Disclosure of Invention
The object of the present utility model is to solve the problems in the background described above and to provide a system for preventing the entry of a hydration catalyst into a cyclohexanol rectifying column.
In order to achieve the above purpose, the present utility model adopts the following scheme:
a system for preventing a hydration catalyst from entering a cyclohexanol rectifying tower comprises a cyclohexanol separating tower, a cyclohexanol separating tower kettle pump, a cyclohexanol rectifying tower first feed evaporator, a cyclohexanol rectifying tower second feed evaporator, a cyclohexanol rectifying tower feed spray separator and a cyclohexanol rectifying tower which are sequentially connected through pipelines, wherein the cyclohexanol rectifying tower first feed evaporator is provided with two outlets, one outlet is connected with an inlet of the cyclohexanol rectifying tower feed spray separator through a pipeline, the other outlet is connected with an inlet of the cyclohexanol rectifying tower second feed evaporator through a pipeline, an outlet of the cyclohexanol rectifying tower second feed evaporator is connected with an inlet of the cyclohexanol rectifying tower feed spray separator through a pipeline, a heavy component outlet is arranged at the bottom of the cyclohexanol rectifying tower, a heavy component discharge pipeline is arranged at the heavy component discharge pipeline, a cyclohexanol separating tower bottom is provided with a catalyst storage tank and a cyclohexanol outlet, and the cyclohexanol outlet is connected with an inlet of the first rectifying tower feed storage tank through a pipeline and the cyclohexanol separating tower kettle pump arranged on the pipeline.
Further, the second feed evaporator of the cyclohexanol rectifying tower is provided with two outlets, one outlet is connected with an inlet of a feed spray separator of the cyclohexanol rectifying tower through a pipeline, the other outlet is connected with a circulating pump of the second feed evaporator of the cyclohexanol rectifying tower, the outlet of the circulating pump of the second feed evaporator of the cyclohexanol rectifying tower is provided with two pipelines, one pipeline is connected with the second feed evaporator of the cyclohexanol rectifying tower, and the other pipeline is a hydration catalyst discharge pipeline.
Further, a cyclohexanol separator cooler and a cyclohexanol separator reflux tank are arranged at the top of the cyclohexanol separator, a cyclohexanol separator reboiler is connected to the lower part of the cyclohexanol separator, a gas phase outlet at the top of the cyclohexanol separator is connected with a shell side inlet of the cyclohexanol separator cooler through a pipeline, a shell side outlet of the cyclohexanol separator is connected with an inlet of the cyclohexanol separator reflux tank through a pipeline, an oil phase outlet and a water phase outlet are arranged in the cyclohexanol separator reflux tank, the oil phase outlet is connected with a reflux port at the upper part of the cyclohexanol separator through a reflux pipeline and a cyclohexanol separator reflux pump arranged on the pipeline, and a recovery pipeline is branched on the reflux pipeline.
Further, the water phase outlet of the reflux tank of the cyclohexanol separating tower is connected with a water phase discharge pipeline, and valves are arranged on the reflux pipeline, the extraction pipeline and the water phase discharge pipeline.
Further, the outlet of the cyclohexanol rectifying tower kettle pump is connected with a cyclohexanol rectifying tower kettle outlet pipeline, and valves are arranged on the outlet pipeline of the cyclohexanol separating tower kettle pump, the outlet pipeline of the cyclohexanol rectifying tower kettle pump, the outlet pipeline of the catalyst storage tank and the heavy component discharge pipeline at the bottom of the cyclohexanol rectifying tower.
The utility model has the following beneficial effects:
according to the scheme, the hydration catalyst is regularly discharged from the bottoms of the second feeding evaporators of the cyclohexanol separating tower and the cyclohexanol rectifying tower, the evaporation effect is improved by adding the first feeding evaporator of the cyclohexanol rectifying tower, the risk that the hydration catalyst enters the cyclohexanol rectifying tower is avoided, the quality of a cyclohexanol product in the cyclohexanol rectifying tower is ensured to reach the standard, the hydration catalyst is prevented from entering the cyclohexanol rectifying tower through optimization and transformation of an energy-saving technology, and the condition that unqualified products are generated due to the fact that low-boiling-point substances in the cyclohexanol product exceed the standard in normal production is avoided, and the quality of the cyclohexanol product in the cyclohexanol rectifying tower is ensured to reach the standard and long-period operation of equipment is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
in the figure: 1. hydration reactor feed pump, 2, cyclohexanol knockout drum, 21, catalyst holding tank, 3, cyclohexanol knockout drum cooler, 4, cyclohexanol knockout drum reflux drum, 41, cyclohexanol knockout drum bottom outlet valve, 5, cyclohexanol knockout drum reflux pump, 51, cyclohexanol knockout drum reflux pump discharge valve, 52, cyclohexanol knockout drum reflux pump reflux valve, 6, cyclohexanol knockout drum reboiler, 61, cyclohexanol knockout drum reboiler medium pressure steam valve, 7, cyclohexanol knockout drum kettle pump, 71, cyclohexanol knockout drum kettle pump discharge valve, 8, cyclohexanol knockout drum first feed evaporator, 81, cyclohexanol knockout drum first feed evaporator medium pressure steam valve, 9, cyclohexanol knockout drum second feed evaporator circulation pump, 10, cyclohexanol knockout drum second feed evaporator, 101, cyclohexanol knockout drum second feed evaporator medium pressure valve, 11, cyclohexanol knockout drum feed spray separator, 12, cyclohexanol knockout drum, 13, cyclohexanol knockout drum kettle pump, 131, cyclohexanol knockout drum second feed evaporator, 132, and pump feed drum second feed evaporator valve, 133.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
A system for preventing a hydration catalyst from entering a cyclohexanol rectifying tower is shown in figure 1, and comprises a cyclohexanol separating tower 2, a cyclohexanol separating tower kettle pump 7, a cyclohexanol rectifying tower first feed evaporator 8, a cyclohexanol rectifying tower second feed evaporator 10, a cyclohexanol rectifying tower feed spray separator 11 and a cyclohexanol rectifying tower 12 which are sequentially connected through pipelines, wherein the top of the cyclohexanol separating tower 2 is provided with a gas phase outlet, the middle part is provided with a cyclohexene outlet and a hydration reaction product inlet, the cyclohexene outlet is connected with the hydration reaction product inlet through a pipeline and arranged on the pipeline, the outlet of the hydration reaction product is connected with the hydration reaction product inlet of the cyclohexanol separating tower 2 through a pipeline, the top of the cyclohexanol separating tower 2 is provided with a cyclohexanol separating tower cooler 3 and a cyclohexanol separating tower reflux tank 4, the lower part of the cyclohexanol separating tower 2 is connected with a cyclohexanol separating tower 6, the shell side inlet of the cyclohexanol separating tower 6 is provided with a steam pipeline, the middle pressure steam pipeline is arranged on the middle pressure steam pipeline, the top of the cyclohexanol separating tower 2 is connected with the gas phase outlet through the pipeline and the cyclohexanol separating tower inlet through the cyclohexanol separating tower 3, the oil phase outlet is connected with the reflux outlet through the cyclohexanol separating tower reflux pipeline and the reflux pipeline, and the reflux pipeline is connected with the reflux pipeline through the reflux pipeline and the reflux pipeline is arranged on the reflux pipeline. The extraction pipeline is provided with a cyclohexanol separating tower reflux pump discharge valve 51, the reflux pipeline is provided with a cyclohexanol separating tower reflux pump reflux valve 52, the water phase outlet of the cyclohexanol separating tower reflux tank 4 is connected with a water phase discharge pipeline, and the water phase discharge pipeline is provided with a cyclohexanol separating tower reflux tank bottom outlet valve 41.
The bottom of the cyclohexanol separation tower 2 is provided with a catalyst storage tank 21 and a cyclohexanol outlet, the cyclohexanol outlet is connected with a cyclohexanol separation tower kettle pump 7 and a cyclohexanol rectification tower first feed evaporator 8 which are arranged on the pipeline, the cyclohexanol rectification tower first feed evaporator 8 is provided with two outlets, one outlet is connected with an inlet of a cyclohexanol rectification tower feed spray separator 11 through the pipeline, the other outlet is connected with an inlet of a cyclohexanol rectification tower second feed evaporator 10 through the pipeline, the cyclohexanol rectification tower second feed evaporator 10 is provided with two outlets, one outlet is connected with an inlet of a cyclohexanol rectification tower feed spray separator 11 through the pipeline, the other outlet is connected with a cyclohexanol rectification tower second feed evaporator circulating pump 9, the outlet of the cyclohexanol rectification tower second feed evaporator circulating pump 9 is provided with two pipelines, one pipeline is connected with a cyclohexanol rectification tower second feed evaporator 10, the other pipeline is a hydration catalyst discharge pipeline, the bottom of a cyclohexanol rectification tower 12 is provided with a heavy component outlet, one heavy component discharge pipeline is provided with a heavy component discharge pipeline, and the cyclohexanol rectification tower second feed evaporator is provided with a catalyst storage tank 13 connected with a rectification tower kettle pump 13. The outlet pipeline of the cyclohexanol separation tower kettle pump 7 is provided with a cyclohexanol separation tower kettle pump outlet valve 71, the shell side inlet of the first feed evaporator 8 is provided with a medium pressure steam pipeline, and the medium pressure steam pipeline is provided with a cyclohexanol rectifying tower first feed evaporator medium pressure steam valve 81.
The outlet of the cyclohexanol rectifying tower kettle pump 13 is connected with a cyclohexanol rectifying tower kettle pump outlet pipeline, a cyclohexanol rectifying tower kettle pump 1# feeding valve 131 is arranged on the outlet pipeline of the catalyst storage tank 21, a cyclohexanol rectifying tower kettle pump 2# feeding valve 132 is arranged on the heavy component discharge pipeline at the bottom of the cyclohexanol rectifying tower 12, and a cyclohexanol rectifying tower kettle pump outlet valve 133 is arranged on the cyclohexanol rectifying tower kettle pump outlet pipeline.
The actual working flow is as follows: the materials from the hydration reactor comprise water, cyclohexene, cyclohexanol and a small amount of hydration catalyst, the components enter the cyclohexanol separation column 2 and are concentrated by a cyclohexanol separation column reboiler 6, cyclohexene at the middle upper part of the cyclohexanol separation column is returned to the hydration reactor through a hydration reactor feed pump 1 to continue reaction, low boiling point materials at the top of the cyclohexanol separation column are condensed by a cyclohexanol separation column cooler 3 and stored in a cyclohexanol separation column reflux tank 4, water and oil components can be separated by a baffle plate in the cyclohexanol separation column reflux tank 4, a water bag at the lower part of the cyclohexanol separation column reflux tank can be used for discharging water through a cyclohexanol separation column reflux tank bottom outlet valve 41, oil components in the cyclohexanol separation column reflux tank 4 are subjected to reflux control component stabilization in the tower through a cyclohexanol separation column reflux pump reflux valve 51, and a part of the components are extracted through a cyclohexanol separation column reflux pump discharge valve 52. The material at the bottom of the cyclohexanol separation tower 2 is sent to a first feeding evaporator 8 of a cyclohexanol rectification tower through a pump 7 at the bottom of the cyclohexanol separation tower, and is evaporated in the first feeding evaporator 8 of the cyclohexanol rectification tower, a part of the material enters a feeding spray separator 11 of the cyclohexanol rectification tower, a part of the material is evaporated again through a second feeding evaporator 10 of the cyclohexanol rectification tower, and the second feeding evaporator 10 of the cyclohexanol rectification tower is circulated by a circulating pump 9 of the second feeding evaporator of the cyclohexanol rectification tower so as to ensure that the catalyst does not densify and block the pipeline, and is discharged periodically. The material of the second feed evaporator 10 of the cyclohexanol rectifying tower enters the cyclohexanol rectifying tower 12 in the form of gas after liquid drops are removed through the feed spray separator 11 of the cyclohexanol rectifying tower, when the pump 13 of the cyclohexanol rectifying tower is operated normally, the pump 2# feed valve 132 of the cyclohexanol rectifying tower is opened, the pump discharge valve 133 of the cyclohexanol rectifying tower is closed, the minimum reflux operation is carried out, when the material of the cyclohexanol rectifying tower 2 is discharged, the pump 2# feed valve 132 of the cyclohexanol rectifying tower is opened, the pump 133 of the cyclohexanol rectifying tower is opened, and the pump 133 of the cyclohexanol rectifying tower is discharged to the waste liquid recovery position, and when the material of the cyclohexanol separating tower 2 is discharged, the pump 1# feed valve 131 of the cyclohexanol rectifying tower is opened, and the pump 133 of the cyclohexanol rectifying tower is discharged to the waste liquid recovery position.
Finally, it should be noted that: the above examples are provided for illustrating the technical solution of the present utility model and are not to be construed as limiting the present utility model, and it should be understood by those skilled in the art that any equivalent or obvious modification of the embodiments of the present utility model without changing the performance or use thereof without departing from the spirit of the present utility model is intended to be included in the scope of the present utility model as claimed.
Claims (5)
1. A system for preventing a hydration catalyst from entering a cyclohexanol rectifying tower is characterized by comprising a cyclohexanol separating tower, a cyclohexanol separating tower kettle pump, a cyclohexanol rectifying tower first feed evaporator, a cyclohexanol rectifying tower second feed evaporator, a cyclohexanol rectifying tower feed spray separator and a cyclohexanol rectifying tower which are sequentially connected through pipelines, wherein the cyclohexanol rectifying tower first feed evaporator is provided with two outlets, one outlet is connected with an inlet of the cyclohexanol rectifying tower feed spray separator through a pipeline, the other outlet is connected with an inlet of the cyclohexanol rectifying tower second feed evaporator through a pipeline, an outlet of the cyclohexanol rectifying tower second feed evaporator is connected with an inlet of the cyclohexanol rectifying tower feed spray separator through a pipeline, the bottom of the cyclohexanol rectifying tower is provided with a heavy component outlet, the heavy component outlet is provided with a heavy component discharge pipeline, the cyclohexanol separating tower bottom is provided with a catalyst storage tank and a cyclohexanol outlet, and the cyclohexanol outlet are connected with the first catalyst storage tank through a pipeline and the cyclohexanol separating tower kettle pump arranged on the pipeline, and the cyclohexanol outlet is connected with the inlet of the first catalyst storage tank through the pipeline.
2. The system for preventing the hydration catalyst from entering the cyclohexanol rectifying tower according to claim 1, wherein the second feeding evaporator of the cyclohexanol rectifying tower is provided with two outlets, one outlet is connected with the inlet of the feeding spray separator of the cyclohexanol rectifying tower through a pipeline, the other outlet is connected with the circulation pump of the second feeding evaporator of the cyclohexanol rectifying tower, the outlet of the circulation pump of the second feeding evaporator of the cyclohexanol rectifying tower is provided with two pipelines, one pipeline is connected with the second feeding evaporator of the cyclohexanol rectifying tower, and the other pipeline is a hydration catalyst discharging pipeline.
3. The system for preventing a hydration catalyst from entering a cyclohexanol rectifying tower according to claim 1, wherein a cyclohexanol separating tower cooler and a cyclohexanol separating tower reflux tank are arranged at the top of the cyclohexanol separating tower, a cyclohexanol separating tower reboiler is connected to the lower part of the cyclohexanol separating tower, a gas phase outlet at the top of the cyclohexanol separating tower is connected with a shell side inlet of the cyclohexanol separating tower cooler through a pipeline, a shell side outlet of the cyclohexanol separating tower cooler is connected with an inlet of the cyclohexanol separating tower reflux tank through a pipeline, the cyclohexanol separating tower reflux tank is provided with an oil phase outlet and a water phase outlet, the oil phase outlet is connected with a reflux port at the upper part of the cyclohexanol separating tower through a reflux pipeline and a cyclohexanol separating tower reflux pump arranged on the pipeline, and a recovery pipeline is branched from the reflux pipeline.
4. A system for preventing a hydration catalyst from entering a cyclohexanol rectifying tower according to claim 3, wherein the water phase outlet of the reflux tank of the cyclohexanol separating tower is connected with a water phase discharging pipe, and valves are provided on the reflux pipe, the extraction pipe and the water phase discharging pipe.
5. The system for preventing the hydration catalyst from entering the cyclohexanol rectifying tower according to claim 1, wherein the outlet of the cyclohexanol rectifying tower kettle pump is connected with a cyclohexanol rectifying tower kettle outlet pipeline, and valves are arranged on the outlet pipeline of the cyclohexanol separating tower kettle pump, the cyclohexanol rectifying tower kettle outlet pipeline, the outlet pipeline of the catalyst storage tank and the heavy component discharge pipeline at the bottom of the cyclohexanol rectifying tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321587645.0U CN220360726U (en) | 2023-06-21 | 2023-06-21 | System for preventing hydration catalyst from entering cyclohexanol rectifying tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321587645.0U CN220360726U (en) | 2023-06-21 | 2023-06-21 | System for preventing hydration catalyst from entering cyclohexanol rectifying tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220360726U true CN220360726U (en) | 2024-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321587645.0U Active CN220360726U (en) | 2023-06-21 | 2023-06-21 | System for preventing hydration catalyst from entering cyclohexanol rectifying tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220360726U (en) |
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2023
- 2023-06-21 CN CN202321587645.0U patent/CN220360726U/en active Active
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