Butanol and octanol raffinate recovery device
By designing a multi-tagged tandem distillation system and a catalytic cracking kettle device, the problem of recombinant treatment in the butocinol residue was solved, the precise separation of components and efficient utilization of resources were achieved, and environmental pollution was reduced.
Patent Information
- Application Number
- CN202422982937.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The prior art is difficult to effectively treat and utilize the recombinant components in the butoctanol residue, especially those above C10. Due to the complex components and low economic benefits, it leads to low resource utilization and environmental pollution problems.
A butoctanol residue recovery device including a multi-tare tandem distillation system and a cracking kettle was designed. Through multiple distillation and catalytic cracking reactions, complex components are separated and converted into available butanaldehyde, butanol, C5. ~C7 components and C8 components to improve resource utilization and reduce emissions.
The precise separation of different components in the butoctanol residue is achieved, which improves resource utilization, reduces residual liquid emissions, and reduces the impact on the environment.
Smart Images
Figure CN222304802U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of butanol production, and specifically relates to a butanol residual liquid recovery device. Background Art
[0002] Butyl octanol residue is a mixed liquid of byproducts produced in the production process of butanol and octanol. During the production of butyl octanol, some substances undergo disproportionation reaction to generate acid, and some substances undergo esterification reaction to generate ester. In the alcohol-aldehyde condensation reaction, some intermediate aldehydes are not further hydrogenated to alcohols, and some target product alcohols are not fully collected and enter the byproduct fraction, resulting in a complex composition of butyl octanol residue. Among the many components of butyl octanol residue, the C4 component is mainly butyraldehyde and butanol, the C5~C7 components are mainly aldehyde-alcohol mixtures, the representative substances of the C8 component are octanal, octanol and octenal, and the C12~C16 components are mostly aldehyde condensation products.
[0003] With the development of industry, the market demand for butanol and octanol has been rising year by year, and the output of butanol and octanol residue has also increased accordingly. At present, multi-tower distillation is mostly used to separate the light components in butanol and octanol residue, such as the recovery of butanol and octanol. However, for the heavy components above C10, due to the complex composition, including a large number of aldehyde condensation products and long carbon chain esters, it is difficult to handle and can usually only be sold as fuel with low economic benefits. The heavy components above C10 account for about 40% of the total butanol and octanol residue. The rational development and utilization of this part of the heavy components is of great significance to improving the comprehensive utilization level of butanol and octanol residue. Utility Model Content
[0004] The utility model aims to provide a butanol residual liquid recovery device, which can gradually separate different components in the butanol residual liquid, improve resource utilization, reduce the butanol residual liquid discharge, and reduce the impact on the environment.
[0005] To achieve the above purpose, the technical solution of the utility model is:
[0006] The butanol residual liquid recovery device comprises a first distillation tower, which is sequentially connected to a second distillation tower, a third distillation tower, a fourth distillation tower and a cracking kettle, a mixed butyraldehyde product tank is arranged on one side of the first distillation tower, a mixed butanol product tank is arranged on one side of the second distillation tower, a C5-C7 product tank is arranged on one side of the third distillation tower, a C8 product tank is arranged on one side of the fourth distillation tower, a catalyst pump group is connected to the top of the cracking kettle, an input end of the catalyst pump group is connected to a catalyst adding tank, a side of the cracking kettle away from the fourth distillation tower is connected to an extraction pump group five, an output end of the extraction pump group five is connected to a cracking kettle cooler, and the bottom end of the cracking kettle cooler is connected to a side of the first distillation tower away from the second distillation tower.
[0007] in:
[0008] The first distillation tower is connected to a preheater on the side away from the second distillation tower, the top of the first distillation tower is connected to a cooler, the bottom of the cooler is connected to a reflux tank, a dehydration bag is arranged in the reflux tank, the bottom of the reflux tank is connected to a reflux pump group, and the output end of the reflux pump group is divided into two branches, one of which is connected to the side of the first distillation tower away from the preheater, and the other branch is connected to a mixed butyraldehyde product tank.
[0009] The bottom of the first distillation tower is provided with two outlets, one of which is connected to a circulation pump group 1, and the other is connected to a production pump group 1. The output end of the circulation pump group 1 is connected to a reboiler 1, the top of the reboiler 1 is connected to the lower part of one side of the first distillation tower close to the preheater, and the output end of the production pump group 1 is connected to the second distillation tower.
[0010] The top of the second distillation tower is connected to cooler 2, the bottom of cooler 2 is connected to reflux tank 2, a dehydration bag is arranged in reflux tank 2, the bottom of reflux tank 2 is connected to reflux pump group 2, the output end of reflux pump group 2 is divided into two branches, one of which is connected to the side of the second distillation tower away from the first distillation tower, and the other branch is connected to the mixed butanol product tank.
[0011] The bottom of the second distillation tower is provided with two outlets, one of which is connected to a circulation pump group 2, and the other is connected to a production pump group 2. The output end of the circulation pump group 2 is connected to a reboiler 2, the top of the reboiler 2 is connected to the lower part of one side of the second distillation tower close to the first distillation tower, and the output end of the production pump group 2 is connected to the third distillation tower.
[0012] The top of the third distillation tower is connected to a cooler three, the bottom of the cooler three is connected to a reflux tank three, a dehydration bag is arranged in the reflux tank three, the bottom of the reflux tank three is connected to a reflux pump group three, and the output end of the reflux pump group three is divided into two branches, one of which is connected to the side of the third distillation tower away from the second distillation tower, and the other branch is connected to the C5~C7 product tank.
[0013] The bottom of the third distillation tower is provided with two outlets, one of which is connected to a circulation pump group three, and the other is connected to an extraction pump group three. The output end of the circulation pump group three is connected to a reboiler three, the top of the reboiler three is connected to the lower part of one side of the third distillation tower close to the second distillation tower, and the output end of the extraction pump group three is connected to the fourth distillation tower.
[0014] The top of the fourth distillation tower is connected to a cooler four, the bottom of the cooler four is connected to a reflux tank four, a dehydration bag is arranged in the reflux tank four, the bottom of the reflux tank four is connected to a reflux pump group four, and the output end of the reflux pump group four is divided into two branches, one of which is connected to the side of the fourth distillation tower away from the third distillation tower, and the other branch is connected to the C8 product tank.
[0015] The bottom of the fourth distillation tower is provided with two outlets, one of which is connected to a circulation pump group four, and the other is connected to an extraction pump group four. The output end of the circulation pump group four is connected to a reboiler four, the top of the reboiler four is connected to the lower part of one side of the fourth distillation tower close to the third distillation tower, and the output end of the extraction pump group four is connected to a cracking kettle.
[0016] A heavy component intermediate storage tank is arranged between the extraction pump group four and the cracking kettle, two outlets are arranged at the bottom of the cracking kettle, one of which is connected to the circulation pump group five, and the other is connected to the waste storage tank, the output end of the circulation pump group five is connected to the reboiler five, the top of the reboiler five is connected to the side of the cracking kettle close to the fourth distillation tower, and a gas phase pipeline is arranged at the top of the cracking kettle.
[0017] The beneficial effects of the utility model are:
[0018] A four-tower distillation system is used to perform multiple distillation operations on the butanol residue, thereby achieving accurate separation of different components in the butanol residue; the heavy components that are difficult to separate in the butanol residue are catalytically cracked by a cracking kettle to convert them into separable butyraldehyde, butanol, C5~C7 components, C8 components, etc., thereby increasing the output of the target product; this device can improve resource utilization, while reducing the discharge of butanol residue and reducing the impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the utility model;
[0020] In the figure:
[0021] 1. Preheater; 2. First distillation tower; 3. Cooler 1; 4. Reflux tank 1; 5. Reflux pump group 1; 6. Mixed butyraldehyde product tank; 7. Circulation pump group 1; 8. Reboiler 1; 9. Extraction pump group 1; 10. Second distillation tower; 11. Cooler 2; 12. Reflux tank 2; 13. Reflux pump group 2; 14. Mixed butanol product tank; 15. Circulation pump group 2; 16. Reboiler 2; 17. Extraction pump group 2; 18. Third distillation tower; 19. Cooler 3; 20. Reflux tank 3; 21. Reflux pump group 3; 22. C5~C 7 product tank; 23. Circulation pump group three; 24. Reboiler three; 25. Production pump group three; 26. Fourth distillation tower; 27. Cooler four; 28. Reflux tank four; 29. Reflux pump group four; 30. C8 product tank; 31. Circulation pump group four; 32. Reboiler four; 33. Production pump group four; 34. Cracking kettle; 35. Circulation pump group five; 36. Reboiler five; 37. Catalyst addition tank; 38. Catalyst pump group; 39. Waste storage tank; 40. Production pump group five; 41. Cracking kettle cooler; 42. Heavy component intermediate storage tank. DETAILED DESCRIPTION
[0022] The utility model is described and illustrated in detail below in conjunction with the accompanying drawings.
[0023] Example 1
[0024] like Figure 1 As shown, the butanol residual liquid recovery device described in the utility model comprises a first distillation tower 2, which is sequentially connected to a second distillation tower 10, a third distillation tower 18, a fourth distillation tower 26 and a cracking kettle 34, a mixed butyraldehyde product tank 6 is provided on one side of the first distillation tower 2, a mixed butanol product tank 14 is provided on one side of the second distillation tower 10, a C5-C7 product tank 22 is provided on one side of the third distillation tower 18, a C8 product tank 30 is provided on one side of the fourth distillation tower 26, a catalyst pump group 38 is connected to the top of the cracking kettle 34, a catalyst addition tank 37 is connected to the input end of the catalyst pump group 38, a production pump group 5 40 is connected to the side of the cracking kettle 34 away from the fourth distillation tower 26, and a cracking kettle cooler 41 is connected to the output end of the production pump group 5 40, and the bottom end of the cracking kettle cooler 41 is connected to the side of the first distillation tower 2 away from the second distillation tower 10.
[0025] The side of the first distillation tower 2 away from the second distillation tower 10 is connected to the preheater 1, the top of the first distillation tower 2 is connected to a cooler 3, the bottom of the cooler 3 is connected to a reflux tank 4, a dehydration bag is arranged in the reflux tank 4, the bottom of the reflux tank 4 is connected to a reflux pump group 5, and the output end of the reflux pump group 5 is divided into two branches, one of which is connected to the side of the first distillation tower 2 away from the preheater 1, and the other branch is connected to the mixed butyraldehyde product tank 6.
[0026] Two outlets are provided at the bottom of the first distillation tower 2, one of which is connected to a circulation pump group 7, and the other is connected to a production pump group 9. The output end of the circulation pump group 7 is connected to a reboiler 8, the top of the reboiler 8 is connected to the lower part of one side of the first distillation tower 2 close to the preheater 1, and the output end of the production pump group 9 is connected to the second distillation tower 10.
[0027] The top of the second distillation tower 10 is connected to a cooler 11, the bottom of the cooler 11 is connected to a reflux tank 12, a dehydration bag is arranged in the reflux tank 12, the bottom of the reflux tank 12 is connected to a reflux pump group 13, and the output end of the reflux pump group 13 is divided into two branches, one of which is connected to the side of the second distillation tower 10 away from the first distillation tower 2, and the other branch is connected to the mixed butanol product tank 14.
[0028] Two outlets are provided at the bottom of the second distillation tower 10, one of which is connected to a circulation pump group 2 15, and the other is connected to a production pump group 2 17. The output end of the circulation pump group 2 15 is connected to a reboiler 2 16, and the top of the reboiler 2 16 is connected to the lower part of one side of the second distillation tower 10 close to the first distillation tower 2, and the output end of the production pump group 2 17 is connected to the third distillation tower 18.
[0029] The top of the third distillation tower 18 is connected to a cooler 3 19, the bottom of the cooler 3 19 is connected to a reflux tank 3 20, a dehydration bag is arranged in the reflux tank 3 20, the bottom of the reflux tank 3 20 is connected to a reflux pump group 3 21, and the output end of the reflux pump group 3 21 is divided into two branches, one of which is connected to the side of the third distillation tower 18 away from the second distillation tower 10, and the other branch is connected to the C5~C7 product tank 22.
[0030] Two outlets are provided at the bottom of the third distillation tower 18, one of which is connected to a circulation pump group three 23, and the other is connected to a production pump group three 25. The output end of the circulation pump group three 23 is connected to a reboiler three 24, the top of the reboiler three 24 is connected to the lower part of one side of the third distillation tower 18 close to the second distillation tower 10, and the output end of the production pump group three 25 is connected to the fourth distillation tower 26.
[0031] The top of the fourth distillation tower 26 is connected to a cooler four 27, the bottom of the cooler four 27 is connected to a reflux tank four 28, a dehydration bag is arranged in the reflux tank four 28, the bottom of the reflux tank four 28 is connected to a reflux pump group four 29, and the output end of the reflux pump group four 29 is divided into two branches, one of which is connected to the side of the fourth distillation tower 26 away from the third distillation tower 18, and the other branch is connected to the C8 product tank 30.
[0032] Two outlets are provided at the bottom of the fourth distillation tower 26, one of which is connected to a circulation pump group four 31, and the other is connected to a production pump group four 33. The output end of the circulation pump group four 31 is connected to a reboiler four 32, the top of the reboiler four 32 is connected to the lower part of one side of the fourth distillation tower 26 close to the third distillation tower 18, and the output end of the production pump group four 33 is connected to the cracking kettle 34.
[0033] A heavy component intermediate storage tank 42 is provided between the extraction pump group four 33 and the cracking kettle 34. Two outlets are provided at the bottom of the cracking kettle 34, one of which is connected to the circulation pump group five 35, and the other is connected to the waste storage tank 39. The output end of the circulation pump group five 35 is connected to the reboiler five 36, and the top of the reboiler five 36 is connected to the side of the cracking kettle 34 close to the fourth distillation tower 26. A gas phase pipeline is provided at the top of the cracking kettle 34.
[0034] Operation process and principle:
[0035] First, the butanol residue enters the preheater 1, is heated to the required temperature, and then enters the first distillation tower 2, where the distillation operation is performed. The components distilled out in the first distillation tower 2 are mainly mixed butyraldehyde, which enters the reflux tank 4 after condensation in the cooler-3, and is dehydrated in the reflux tank-4. A part of the dehydrated mixed butyraldehyde refluxes to the first distillation tower 2 through a branch of the reflux pump group-5, and the other part enters the mixed butyraldehyde product tank 6 through another branch of the reflux pump group-5. A part of the material at the bottom of the first distillation tower 2 is transported to the reboiler-8 through the circulation pump group-7, and returns to the bottom of the first distillation tower 2 after heating in the reboiler-8, and the other part of the material is transported to the second distillation tower 10 through the extraction pump group-9.
[0036] The material entering the second distillation tower 10 is distilled again. The components distilled out of the first distillation tower 2 are mainly mixed butyraldehyde, and the mixed butanol is condensed by the cooler 11 and enters the reflux tank 12 for dehydration. A part of the dehydrated mixed butanol is refluxed to the second distillation tower 10 through a branch of the reflux pump group 13, and the other part enters the mixed butanol product tank 14 through another branch of the reflux pump group 13. A part of the material at the bottom of the second distillation tower 10 is transported to the reboiler 16 through the circulation pump group 15, and returns to the bottom of the second distillation tower 10 after being heated by the reboiler 16, and the other part of the material is transported to the third distillation tower 18 through the extraction pump group 17.
[0037] The materials entering the third distillation tower 18 are distilled again. The components distilled out in the third distillation tower 18 are mainly C5~C7 components. After condensation in the cooler three 19, the C5~C7 components enter the reflux tank three 20 for dehydration. A part of the dehydrated C5~C7 components refluxes to the third distillation tower 18 through a branch of the reflux pump group three 21, and the other part enters the C5~C7 product tank 22 through another branch of the reflux pump group three 21. A part of the materials at the bottom of the third distillation tower 18 is transported to the reboiler three 24 through the circulation pump group three 23, and returns to the bottom of the third distillation tower 18 after being heated in the reboiler three 24. The other part of the materials is transported to the fourth distillation tower 26 through the extraction pump group three 25.
[0038] The material entering the fourth distillation tower 26 is distilled again. The components distilled out in the fourth distillation tower 26 are mainly C8 components. After condensation in the cooler 27, the C8 components enter the reflux tank 28 for dehydration. A part of the dehydrated C8 components refluxes to the fourth distillation tower 26 through a branch of the reflux pump group 29, and the other part enters the C8 product tank 30 through another branch of the reflux pump group 29. A part of the material at the bottom of the fourth distillation tower 26 is transported to the reboiler 32 through the circulation pump group 31, and returns to the bottom of the fourth distillation tower 26 after being heated in the reboiler 32. The other part of the material is transported to the cracking kettle 34 through the extraction pump group 33.
[0039] In the cracking kettle 34, the material undergoes a catalytic cracking reaction under the action of the catalyst, and the cracking products are mainly butyraldehyde, butanol, C5~C7 components, C8 components and un-cracked C8 and above components. The cracking products flow out from the middle of the cracking kettle 34, are sent to the cracking kettle cooler 41 through the extraction pump group 5 40, and then are cooled and merged into the first distillation tower 2, and then successively pass through the second distillation tower 10, the third distillation tower 18 and the fourth distillation tower 26 for purification and separation. The separated butyraldehyde enters the mixed butyraldehyde product tank 6, butanol enters the mixed butanol product tank 14, the C5~C7 components enter the C5~C7 product tank 22, and the C8 components enter the C8 product tank 30. The un-decomposed C8 and above components and the cracking catalyst return to the cracking kettle 34 from the fourth distillation tower 26.
[0040] The top of the cracking kettle 34 is connected to a catalyst adding tank 37. When the catalyst concentration in the cracking kettle 34 is low, the catalyst is added to the cracking kettle 34 by a catalyst pump group 38. A waste storage tank 39 is provided at the bottom of the cracking kettle 34 for discharging waste materials to maintain the effective concentration of the catalyst in the cracking kettle 34 and ensure the continuous progress of the cracking reaction. During the shutdown of the cracking kettle 34, the heavy components of the fourth distillation tower 26 are discharged into the heavy component intermediate storage tank 42 for temporary storage.
Claims
1. A device for recovering butanol residue, comprising a first distillation tower (2), characterized in that: The first distillation tower (2) is connected to the second distillation tower (10), the third distillation tower (18), the fourth distillation tower (26) and the cracking kettle (34) in sequence; a mixed butyraldehyde product tank (6) is provided on one side of the first distillation tower (2); a mixed butanol product tank (14) is provided on one side of the second distillation tower (10); a C5-C7 product tank (22) is provided on one side of the third distillation tower (18); a C8 product tank (30) is provided on one side of the fourth distillation tower (26); a catalyst pump group (38) is connected to the top of the cracking kettle (34); an input end of the catalyst pump group (38) is connected to a catalyst addition tank (37); a side of the cracking kettle (34) away from the fourth distillation tower (26) is connected to an extraction pump group five (40); an output end of the extraction pump group five (40) is connected to a cracking kettle cooler (41); and a bottom end of the cracking kettle cooler (41) is connected to a side of the first distillation tower (2) away from the second distillation tower (10).
2. The device for recovering the butanol residue according to claim 1, characterized in that: A preheater (1) is connected to the side of the first distillation tower (2) away from the second distillation tower (10); a cooler (3) is connected to the top of the first distillation tower (2); a reflux tank (4) is connected to the bottom of the cooler (3); a dehydration bag is arranged in the reflux tank (4); a reflux pump group (5) is connected to the bottom of the reflux tank (4); an output end of the reflux pump group (5) is divided into two branches, one of which is connected to the side of the first distillation tower (2) away from the preheater (1); and the other branch is connected to a mixed butyraldehyde product tank (6).
3. The device for recovering the butanol residue according to claim 2, characterized in that: The first distillation tower (2) is provided with two outlets at the bottom, one of which is connected to a circulation pump group 1 (7), and the other is connected to an extraction pump group 1 (9). The output end of the circulation pump group 1 (7) is connected to a reboiler 1 (8). The top end of the reboiler 1 (8) is connected to the lower part of one side of the first distillation tower (2) close to the preheater (1), and the output end of the extraction pump group 1 (9) is connected to the second distillation tower (10).
4. The device for recovering the butanol residue according to claim 1, characterized in that: The top of the second distillation tower (10) is connected to a second cooler (11), the bottom of the second cooler (11) is connected to a second reflux tank (12), a dehydration bag is arranged in the second reflux tank (12), the bottom of the second reflux tank (12) is connected to a second reflux pump group (13), the output end of the second reflux pump group (13) is divided into two branches, one of which is connected to a side of the second distillation tower (10) away from the first distillation tower (2), and the other branch is connected to a mixed butanol product tank (14).
5. The device for recovering butanol residual liquid according to claim 1, characterized in that: The second distillation tower (10) is provided with two outlets at the bottom, one of which is connected to the second circulation pump group (15), and the other is connected to the second extraction pump group (17). The output end of the second circulation pump group (15) is connected to the second reboiler (16). The top end of the second reboiler (16) is connected to the lower part of one side of the second distillation tower (10) close to the first distillation tower (2). The output end of the second extraction pump group (17) is connected to the third distillation tower (18).
6. The device for recovering butanol residual liquid according to claim 1, characterized in that: The top of the third distillation tower (18) is connected to a cooler three (19), the bottom of the cooler three (19) is connected to a reflux tank three (20), a dehydration bag is arranged in the reflux tank three (20), the bottom of the reflux tank three (20) is connected to a reflux pump group three (21), the output end of the reflux pump group three (21) is divided into two branches, one of which is connected to the side of the third distillation tower (18) away from the second distillation tower (10), and the other branch is connected to the C5~C7 product tank (22).
7. The device for recovering the butanol residue according to claim 1, characterized in that: The third distillation tower (18) is provided with two outlets at the bottom, one of which is connected to a circulation pump group three (23), and the other is connected to a production pump group three (25). The output end of the circulation pump group three (23) is connected to a reboiler three (24). The top end of the reboiler three (24) is connected to the lower part of one side of the third distillation tower (18) close to the second distillation tower (10). The output end of the production pump group three (25) is connected to a fourth distillation tower (26).
8. The device for recovering butanol residual liquid according to claim 1, characterized in that: The top of the fourth distillation tower (26) is connected to a cooler four (27), the bottom of the cooler four (27) is connected to a reflux tank four (28), a dehydration bag is arranged in the reflux tank four (28), the bottom of the reflux tank four (28) is connected to a reflux pump group four (29), the output end of the reflux pump group four (29) is divided into two branches, one of which is connected to the side of the fourth distillation tower (26) away from the third distillation tower (18), and the other branch is connected to the C8 product tank (30).
9. The device for recovering butanol residual liquid according to claim 1, characterized in that: The fourth distillation tower (26) is provided with two outlets at the bottom, one of which is connected to a circulation pump group four (31), and the other is connected to a production pump group four (33). The output end of the circulation pump group four (31) is connected to a reboiler four (32). The top end of the reboiler four (32) is connected to the lower part of one side of the fourth distillation tower (26) close to the third distillation tower (18). The output end of the production pump group four (33) is connected to a cracking kettle (34).
10. The device for recovering butanol residual liquid according to claim 9, characterized in that: A heavy component intermediate storage tank (42) is provided between the extraction pump group four (33) and the cracking kettle (34). Two outlets are provided at the bottom of the cracking kettle (34), one of which is connected to the circulation pump group five (35), and the other is connected to the waste storage tank (39). The output end of the circulation pump group five (35) is connected to the reboiler five (36), and the top of the reboiler five (36) is connected to the side of the cracking kettle (34) close to the fourth distillation tower (26). A gas phase pipeline is provided at the top of the cracking kettle (34).