CN216170013U - Tower composite set of purification multistage distillation is refine to industrial chemicals - Google Patents
Tower composite set of purification multistage distillation is refine to industrial chemicals Download PDFInfo
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- CN216170013U CN216170013U CN202122767485.5U CN202122767485U CN216170013U CN 216170013 U CN216170013 U CN 216170013U CN 202122767485 U CN202122767485 U CN 202122767485U CN 216170013 U CN216170013 U CN 216170013U
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Abstract
The utility model discloses a multistage distillation tower type combination device for refining and purifying chemical raw materials, which comprises a first extractive distillation tower lower section, a first stripping tower, a heavy component removal tower lower section and a second extractive distillation tower lower section, wherein the lower end of the first extractive distillation tower lower section is respectively connected with a middle-boiling device and a kettle reboiler, the first stripping tower is connected with the first extractive distillation tower lower section through a heat exchanger, a filter and a pipeline, the heavy component removal tower lower section is connected with the heavy component removal tower upper section through an output pipe II, the second extractive distillation tower lower section is connected with the second extractive distillation tower upper section through an output pipe III, and the second extractive distillation tower upper section is connected with an isoprene light component removal tower through a condenser III, a condensate tank III and a metering pump III. The tower-type combined device for refining and purifying the chemical raw materials can obtain high-purity polymer grade isoprene, improves the utilization rate of intermediate products generated in the chemical combination process, and effectively reduces the cost.
Description
Technical Field
The utility model relates to the technical field of a multistage distillation tower type combined device, in particular to a multistage distillation tower type combined device for refining and purifying chemical raw materials.
Background
The product after will reacting of solvent need be utilized to carry out corresponding extraction in the chemical synthesis process of polymer level isoprene preparation, often can distill after extracting to obtain required reaction product, but current distillation mode is mostly one-level distillation, make the product in the solvent can't break away from fully, the purity of required product is lower, other material of separation in distillation process in addition also can't obtain effectual utilization, and then cause the waste of resource.
Therefore, we improve the device and provide a multistage distillation tower type combined device for refining and purifying chemical raw materials.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a multistage distillation tower type combined device for refining and purifying chemical raw materials, which aims to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: a multi-stage distillation tower type combination device for refining and purifying chemical raw materials comprises a first extractive distillation tower lower section, a first stripping tower, a heavy component removal tower lower section and a second extractive distillation tower lower section, wherein the lower end of the first extractive distillation tower lower section is respectively connected with a boiler and a kettle reboiler in the tower, the top of the first extractive distillation tower lower section is connected with a first extractive distillation tower upper section through a first output pipe, the first stripping tower is connected with the first extractive distillation tower lower section through a heat exchanger, a filter and a pipeline, the top of the first stripping tower is respectively connected with a second chemical pump and a first condenser through a mixing pipe, the first condenser is connected with a first condensate tank through a pipeline, the first condensate tank is respectively connected with the first stripping tower, the kettle reboiler and the heavy component removal tower lower section through a first metering pump, a change valve and a pipeline, the heavy component removal tower lower section is connected with the heavy component removal tower upper section through a second output pipe, and the heavy component removal tower upper section and the chemical pump tee are connected with the second condenser through a mixing pipe, the condenser II is connected with the condensate tank II through a pipeline, the condensate tank II is connected with the lower section of the second extractive distillation tower through a metering pump II and a pipeline, the lower section of the second extractive distillation tower is connected with the upper section of the second extractive distillation tower through an output pipe III, the condensate tank III is connected with the isoprene lightness-removing tower through a condenser III, the condensate tank III and the metering pump III, the tower side of the isoprene lightness-removing tower and the chemical pump six are connected with a condenser V through a mixing pipe, the condenser V is connected with an intermediate tank, and the intermediate tank is connected with a finished product tank through a transport pump.
Preferably, the pressure of the top of the first extractive distillation tower at the upper section is 0.008-0.015MPa, the temperature is 30-40 ℃, a differential pressure sensor is arranged in the first extractive distillation tower at the upper section, and the lower end of the first extractive distillation tower at the upper section is connected with the top of the first extractive distillation tower at the lower section through a delivery pump and a pipeline.
Preferably, the upper end of the upper section of the first extractive distillation tower is connected with a first chemical pump through a mixing pipe, condensate flowing out of a tower top condenser at the top of the upper section of the first extractive distillation tower flows into a liquid storage tank through a pipeline, part of condensate in the liquid storage tank flows into the upper end of the upper section of the first extractive distillation tower through a first reflux pump and a first reflux pipe, and meanwhile, a guide sieve plate is connected with the lower section of the first extractive distillation tower and the inner part of the upper section of the first extractive distillation tower.
Preferably, the first stripping tower is internally connected with a guide sieve plate, the pressure of the top of the first stripping tower is 0.008-0.015MPa, the temperature of the first stripping tower is 40-43 ℃, and meanwhile, the first condensate tank is connected with the upper end of the first stripping tower through a first metering pump, a first direction changing valve and a second return pipe.
Preferably, the pressure at the top of the lower section of the de-weighting tower is 0.07-0.075MPa, the temperature is 45-50 ℃, the pressure at the bottom of the de-weighting tower is 0.1-0.13MPa, the temperature is 60-70 ℃, the upper section of the de-weighting tower is connected with the upper end of the lower section of the de-weighting tower through a delivery pump and a pipeline, and the pressure at the top of the upper section of the de-weighting tower is 0.035-0.045MPa, and the temperature is 40-43 ℃.
Preferably, the lower section of the second extractive distillation column and the upper section of the second extractive distillation column are both internally connected with guide floating valves, the tower top temperature of the lower section of the second extractive distillation column is 50-56 ℃, the pressure is 0.055-0.060MPa, the tower bottom temperature is 125-135 ℃, the pressure is 0.09-0.1MPa, the tower bottom pressure of the upper section of the second extractive distillation column is 0.05-0.060MPa, the tower top temperature is 32-36 ℃, and the pressure is 0.008-0.015MPa, meanwhile, a pipeline of the circulating solvent is connected to the side surface of the upper section of the second extractive distillation column relative to the tenth tower plate, and the upper section of the second extractive distillation column is connected with the lower section of the second extractive distillation column through a delivery pump and a pipeline.
Preferably, the top pressure of the isoprene lightness-removing column is 0.035-0.045MPa, the temperature is 40-45 ℃, the kettle temperature of the isoprene lightness-removing column is 50-60 ℃, and the pressure is 0.085-0.095 MPa.
Compared with the prior art, the utility model has the beneficial effects that: the tower type combination device for refining and purifying the chemical raw materials comprises a first extractive distillation tower, a first extraction distillation tower, a second extraction distillation tower, a third extraction distillation tower, a fourth extraction distillation tower, a fifth extraction distillation tower, a sixth extraction distillation tower, a fifth extraction distillation tower and a fifth extraction distillation tower, a fifth extraction distillation tower and a fifth extraction distillation tower, wherein the crude isoprene materials are subjected to corresponding extractive distillation in the lower section of the first extraction distillation tower and the upper section of the first extraction distillation tower and the second extraction distillation tower and the upper section of the first extraction distillation tower are matched with the first extraction distillation tower through a filter, the third extraction distillation tower, the third, thereby reducing the cost.
Drawings
FIG. 1 is a schematic view of the connection of a first extractive distillation process apparatus according to the present invention;
FIG. 2 is a schematic view of the second extractive distillation process apparatus according to the present invention;
FIG. 3 is a schematic flow diagram of a first extractive distillation step of the structure of the present invention;
FIG. 4 is a schematic flow diagram of a second extractive distillation process according to the present invention.
In the figure: 1. the lower section of the first extractive distillation tower; 2. a guide sieve plate; 3. a boiler in the tower; 4. a tower kettle reboiler; 5. a filter; 6. a heat exchanger; 7. a first stripping column; 8. a first output pipe; 9. a liquid storage tank; 10. a first return pipe; 11. a first reflux pump; 12. an upper section of the first extractive distillation column; 13. a first chemical pump; 14. a differential pressure sensor; 15. a second chemical pump; 16. a first condenser; 17. a condensate tank I; 18. a first metering pump; 19. the lower section of the de-weighting tower; 20. the upper section of the de-weighting tower; 21. the lower section of the second extractive distillation tower; 22. the upper section of the second extractive distillation tower; 23. an isoprene lightness-removing tower; 24. an intermediate tank; 25. and (5) a finished product groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a multi-stage distillation tower type combination device for refining and purifying chemical raw materials comprises a first extractive distillation tower lower section 1, a first stripping tower 7, a heavy component removal tower lower section 19 and a second extractive distillation tower lower section 21, wherein the lower end of the first extractive distillation tower lower section 1 is respectively connected with a tower middle boiler 3 and a tower kettle reboiler 4, the top of the first extractive distillation tower lower section 1 is connected with a first extractive distillation tower upper section 12 through a first output pipe 8, the tower top pressure of the first extractive distillation tower upper section 12 is 0.008-0.015MPa, the temperature is 30-40 ℃, a differential pressure sensor 14 is arranged in the first extractive distillation tower upper section 12, and the lower end of the first extractive distillation tower upper section 12 is connected with the top of the first extractive distillation tower lower section 1 through a delivery pump and a pipeline; the upper end of the upper section 12 of the first extractive distillation tower is connected with a first chemical pump 13 through a mixing pipe, condensate flowing out of a tower top condenser at the top of the upper section 12 of the first extractive distillation tower flows into a liquid storage tank 9 through a pipeline, part of condensate in the liquid storage tank 9 flows into the upper end of the upper section 12 of the first extractive distillation tower through a first reflux pump 11 and a first reflux pipe 10, and meanwhile, the inner parts of the lower section 1 of the first extractive distillation tower and the upper section 12 of the first extractive distillation tower are both connected with a guide sieve plate 2; the inside of the first stripping tower 7 is connected with the guide sieve plate 2, the pressure of the top of the first stripping tower 7 is 0.008-0.015MPa, the temperature is 40-43 ℃, and meanwhile, the condensate tank I17 is connected with the upper end of the first stripping tower 7 through a metering pump I18, a change valve and a return pipe II; the first stripping tower 7 is connected with the lower section 1 of the first extractive distillation tower through a heat exchanger 6, a filter 5 and a pipeline, the top of the first stripping tower 7 is respectively connected with a second chemical pump 15 and a first condenser 16 through a mixing pipe, the first condenser 16 is connected with a first condensate tank 17 through a pipeline, meanwhile, the condensate tank I17 is respectively connected with the first stripping tower 7, the tower kettle reboiler 4 and the heavy component removal tower lower section 19 through a metering pump I18, a change valve and a pipeline, the heavy component removal tower lower section 19 is connected with the heavy component removal tower upper section 20 through an output pipe II, the tower top pressure of the heavy component removal tower lower section 19 is 0.07-0.075MPa, the temperature is 45-50 ℃, the tower kettle pressure is 0.1-0.13MPa, the temperature is 60-70 ℃, and the heavy component removal tower upper section 20 is connected with the upper end of the heavy component removal tower lower section 19 through a delivery pump and a pipeline, simultaneously, the pressure of the top of the upper section 20 of the de-weighting tower is 0.035-0.045MPa, and the temperature is 40-43 ℃; the upper section 20 of the heavy component removal tower and the chemical pump III are connected with a condenser II through a mixing pipe, the condenser II is connected with a condensate tank II through a pipeline, meanwhile, the condensate tank II is connected with the lower section 21 of the second extractive distillation tower through a metering pump II and a pipeline, the interiors of the lower section 21 of the second extractive distillation tower and the upper section 22 of the second extractive distillation tower are both connected with a guide floating valve, the tower top temperature of the lower section 21 of the second extractive distillation tower is 50-56 ℃, the pressure is 0.055-0.060MPa, the tower kettle temperature is 125-135 ℃, and the pressure is 0.09-0.1MPa, the pressure of the tower bottom of the upper section 22 of the second extractive distillation tower is 0.05-0.060MPa, the temperature of the tower top is 32-36 ℃, the pressure is 0.008-0.015MPa, meanwhile, a pipeline for circulating the solvent is connected to the side surface of the upper section 22 of the second extractive distillation tower at a position corresponding to the tenth tower plate, and the upper section 22 of the second extractive distillation tower is connected with the lower section 21 of the second extractive distillation tower through a delivery pump and a pipeline; the lower section 21 of the second extractive distillation tower is connected with the upper section 22 of the second extractive distillation tower through a third output pipe, the upper section 22 of the second extractive distillation tower is connected with an isoprene lightness-removing tower 23 through a third condenser, a third condensate tank and a third metering pump, the top pressure of the isoprene lightness-removing tower 23 is 0.035-0.045MPa, the temperature is 40-45 ℃, the kettle temperature of the isoprene lightness-removing tower 23 is 50-60 ℃, and the pressure is 0.085-0.095 MPa; meanwhile, the tower side of the isoprene lightness-removing tower 23 and the chemical pump six are connected with the condenser five through a mixing pipe, the condenser five is connected with the intermediate tank 24, and the intermediate tank 24 is connected with the finished product tank 25 through a transport pump.
As shown in fig. 1 and fig. 2, the crude isoprene material is subjected to corresponding extractive distillation in the lower section 1 of the first extractive distillation column and the upper section 12 of the first extractive distillation column by using a DMF solvent, alkane and monoolefin components in the crude isoprene material are removed by using a filter 5, a heat exchanger 6 and a first stripping column 7, and then the remaining material is separated from the solvent and then is rectified in the lower section 19 of the de-heavy column and the upper section 20 of the de-heavy column, so as to obtain chemical grade isoprene with the purity of more than 98%, and then the material is subjected to corresponding reaction in the lower section 21 of the second extractive distillation column, the upper section 22 of the second extractive distillation column and the isoprene lightness-removing column 23, so as to obtain polymer grade isoprene.
As shown in fig. 3 and 4, other substances separated and generated in the whole process are classified and transported to corresponding positions through corresponding pipelines and delivery pumps, so that the utilization rate of materials is effectively improved, and the cost is reduced.
The working principle is as follows: when the multistage distillation tower type combination device for refining and purifying the chemical raw materials is used, the raw materials are input into a lower section 1 of a first extractive distillation tower, a tower kettle reboiler 4 and a tower middle boiling device 3 are heated, the heated materials enter the lower section 1 of the first extractive distillation tower for steam-liquid separation, the kettle liquid is filtered by a filter 5 and then is sent into a heat exchanger 6 by a pump, the kettle liquid is cooled and then enters a first stripping tower 7, the tower top steam of the first stripping tower 7 enters a tower kettle of an upper section 12 of the first extractive distillation tower, the tower top steam of the upper section 12 of the first extractive distillation tower is condensed by a tower top condenser and then flows into a liquid storage tank 9, a part of condensate is sent into the tower top of the upper section 12 of the first extractive distillation tower by a pump for reflux, the rest part of the condensate is sent into a residual C5 and mono-olefin extraction tank, the C5 hydrocarbon steam mixed and compounded mixture from the tower top of the first stripping tower 7 is input into a condenser 16, the condensate in a condensate tank 17 is sent into a heavy component removal tower 19 by a metering pump 18 and a lower section valve, the lower section 19 of the de-heavy tower is conveyed to the upper section 20 of the de-heavy tower, mixed with corresponding chemical mixture and then input into a second condenser, then condensate is input into a lower section 21 of a second extractive distillation tower, the lower section 21 of the second extractive distillation tower is input into an upper section 22 of the second extractive distillation tower, steam output by the upper section 22 of the second extractive distillation tower is mixed with corresponding chemical mixture and then input into a middle tank 24 through a sixth condenser, and the steam is input into a finished product tank 25 through a pump after being detected to be qualified; the whole working process of the multi-stage distillation tower type combined device for refining and purifying the chemical raw materials is realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a tower composite set of purification multistage distillation is refine to industrial chemicals, includes first extractive distillation tower hypomere (1), first stripping column (7), takes off heavy column hypomere (19) and second extractive distillation tower hypomere (21), its characterized in that: the lower end of the first extractive distillation tower lower section (1) is respectively connected with a middle-boiling device (3) and a tower kettle reboiler (4), the top of the first extractive distillation tower lower section (1) is connected with a first extractive distillation tower upper section (12) through a first output pipe (8), the first stripping tower (7) is connected with the first extractive distillation tower lower section (1) through a heat exchanger (6), a filter (5) and a pipeline, the top of the first stripping tower (7) is respectively connected with a second chemical pump (15) and a first condenser (16) through a mixing pipe, the first condenser (16) is connected with a first condensate tank (17) through a pipeline, the first condensate tank (17) is simultaneously connected with the first stripping tower (7), the tower kettle reboiler (4) and a heavy component removal tower lower section (19) through a first metering pump (18), a turning valve and a pipeline, the heavy component removal tower lower section (19) is connected with a heavy component removal tower upper section (20) through a second output pipe, and heavy tower upper segment (20) and chemical pump three are taken off and condenser two is passed through the hybrid tube connection, and condenser two passes through pipe connection condensate tank two, and condensate tank two passes through metering pump two and pipe connection second extractive distillation tower hypomere (21) simultaneously, second extractive distillation tower hypomere (21) are through output tube three connection second extractive distillation tower upper segment (22), and second extractive distillation tower upper segment (22) are through condenser three, condensate tank three and metering pump three connection isoprene lightness-removing tower (23), and isoprene lightness-removing tower (23) tower side and chemical pump six are through hybrid tube connection condenser five simultaneously, and intermediate tank (24) are connected to condenser five, and intermediate tank (24) are through transport pump connection finished product groove (25).
2. The tower-type combined device for refining and purifying chemical raw materials according to claim 1, which is characterized in that: the pressure of the top of the first extractive distillation tower upper section (12) is 0.008-0.015MPa, the temperature is 30-40 ℃, a differential pressure sensor (14) is arranged in the first extractive distillation tower upper section (12), and the lower end of the first extractive distillation tower upper section (12) is connected with the top of the first extractive distillation tower lower section (1) through a delivery pump and a pipeline.
3. The tower-type combined device for refining and purifying chemical raw materials according to claim 1, which is characterized in that: the upper end of first extractive distillation tower upper segment (12) is passed through the hybrid tube and is connected chemical pump (13), and the lime set of the top of the tower condenser outflow at first extractive distillation tower upper segment (12) top passes through pipeline inflow reservoir (9), and the part lime set in reservoir (9) flows into first extractive distillation tower upper segment (12) upper end through backwash pump (11) and back flow (10), and direction sieve board (2) are all connected to the inside of first extractive distillation tower hypomere (1) and first extractive distillation tower upper segment (12) simultaneously.
4. The tower-type combined device for refining and purifying chemical raw materials according to claim 1, which is characterized in that: the first stripping tower (7) is internally connected with the guide sieve plate (2), the pressure of the top of the first stripping tower (7) is 0.008-0.015MPa, the temperature is 40-43 ℃, and meanwhile, the condensate tank I (17) is connected with the upper end of the first stripping tower (7) through a metering pump I (18), a change valve and a return pipe II.
5. The tower-type combined device for refining and purifying chemical raw materials according to claim 1, which is characterized in that: the pressure at the top of the lower section (19) of the de-weighting tower is 0.07-0.075MPa, the temperature is 45-50 ℃, the pressure at the bottom of the tower is 0.1-0.13MPa, the temperature is 60-70 ℃, the upper section (20) of the de-weighting tower is connected with the upper end of the lower section (19) of the de-weighting tower through a delivery pump and a pipeline, and the pressure at the top of the upper section (20) of the de-weighting tower is 0.035-0.045MPa, and the temperature is 40-43 ℃.
6. The tower-type combined device for refining and purifying chemical raw materials according to claim 1, which is characterized in that: the inner parts of the lower section (21) and the upper section (22) of the second extractive distillation tower are both connected with guide floating valves, the tower top temperature of the lower section (21) of the second extractive distillation tower is 50-56 ℃, the pressure is 0.055-0.060MPa, the tower bottom temperature is 125-135 ℃, the pressure is 0.09-0.1MPa, the tower bottom pressure of the upper section (22) of the second extractive distillation tower is 0.05-0.060MPa, the tower top temperature is 32-36 ℃, and the pressure is 0.008-0.015MPa, meanwhile, a pipeline of a circulating solvent is connected to the side surface of the upper section (22) of the second extractive distillation tower at the position corresponding to the tenth tower plate, and the upper section (22) of the second extractive distillation tower is connected with the lower section (21) of the second extractive distillation tower through a delivery pump and a pipeline.
7. The tower-type combined device for refining and purifying chemical raw materials according to claim 1, which is characterized in that: the pressure at the top of the isoprene lightness-removing column (23) is 0.035-0.045MPa, the temperature is 40-45 ℃, the temperature of the kettle of the isoprene lightness-removing column (23) is 50-60 ℃, and the pressure is 0.085-0.095 MPa.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117682596A (en) * | 2024-02-01 | 2024-03-12 | 中化化工科学技术研究总院有限公司 | Extraction stripping system for treating semi-coke wastewater |
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2021
- 2021-11-12 CN CN202122767485.5U patent/CN216170013U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117682596A (en) * | 2024-02-01 | 2024-03-12 | 中化化工科学技术研究总院有限公司 | Extraction stripping system for treating semi-coke wastewater |
| CN117682596B (en) * | 2024-02-01 | 2024-04-05 | 中化化工科学技术研究总院有限公司 | Extraction stripping system for treating semi-coke wastewater |
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