A distillation apparatus with two stages of cooling
By introducing a primary cooling tower and a secondary cooling tower into the distillation unit, and using a combination of ordinary circulating water and low-temperature chilled water for cooling, the problem of high energy consumption in conventional distillation towers is solved, thereby achieving energy reduction and efficient material separation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGXIA BINHE ZERUI NEW MATERIALS TECHNOLOGY CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-06-12
AI Technical Summary
Conventional distillation columns consume a lot of energy during the condensation process at the top of the column, and existing technologies are unable to effectively reduce this energy consumption.
A two-stage cooling system is adopted, using ordinary circulating water in the first-stage cooling tower and low-temperature chilled water in the second-stage cooling tower, combining different cooling media to reduce the energy consumption of equipment operation.
While achieving material collection and separation, it reduced the overall energy consumption of the device.
Smart Images
Figure CN224345440U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical technology, specifically to a two-stage cooling distillation apparatus. Background Technology
[0002] Liquid distillation in chemical engineering is a core technology that separates components in a mixture based on differences in volatility, and it is widely used in petroleum, pharmaceutical, and fine chemical industries. In chemical production, distillation is an effective means of purifying and separating products. Conventional distillation columns typically use top condensation for material reflux; however, if the top condensation temperature is relatively low, energy consumption is generally high. Therefore, a two-stage cooling distillation device has been proposed. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a two-stage cooling distillation apparatus, which solves the problems mentioned in the background section.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a two-stage cooling distillation apparatus, comprising a base plate, a reboiler fixedly connected to the top of the base plate, a distillation column mounted on the reboiler, the distillation column consisting of a column section shell, a primary cooling tower, a collector, and a secondary cooling tower, a collector mounted at the top of the column section shell, a primary cooling tower mounted inside the column section shell and below the collector, a secondary cooling tower mounted on top of the collector, a chilled water inlet mounted on the outer side of the secondary cooling tower, a chilled water outlet fixedly connected to the outer side of the secondary cooling tower and to the side of the chilled water inlet, a circulating water inlet fixedly connected to one side of the primary cooling tower, and a circulating water outlet fixedly connected to the other side of the primary cooling tower.
[0005] Preferably, the primary cooling tower is equipped with cooling pipes, and one end of the circulating water inlet and one end of the circulating water outlet are fixedly connected to the front and rear ends of the cooling pipes, respectively.
[0006] Preferably, the secondary cooling tower is equipped with cooling pipes, and one end of the chilled water outlet and one end of the chilled water inlet are fixedly connected to the front and rear ends of the cooling pipes, respectively.
[0007] Preferably, a light fraction collecting vessel is fixedly connected to the top of the bottom plate and to one side of the column reboiler, a front fraction collecting vessel is fixedly connected to the top of the bottom plate and to the other side of the column reboiler, and a rear fraction collecting vessel is fixedly connected to the top of the bottom plate and to one side of the front fraction collecting vessel. The front fraction collecting vessel and the rear fraction collecting vessel are connected to the collecting end of the collector through a second pipe.
[0008] Preferably, the light fraction collection vessel is connected to the collection end on the top end cap of the secondary cooling tower via a first pipe.
[0009] Preferably, three packing supports are installed inside the tower section cylinder. Each packing support is topped with wire mesh structured packing, and each wire mesh structured packing is topped with a seasoning pressure plate. The seasoning pressure plate, the packing supports, and the wire mesh structured packing form a packing structure. One packing structure is located below the primary cooling tower, and the other two packing structures are located between the collector and the primary cooling tower. A tubular distributor is installed inside the collector.
[0010] This invention provides a two-stage cooling distillation apparatus, which has the following advantages:
[0011] This two-stage cooling distillation unit, by setting up a primary cooling tower and a secondary cooling tower, adopts a two-stage condensation method to reduce the operating energy consumption of the equipment. The primary cooling tower uses ordinary circulating water, while the secondary cooling tower uses low-temperature chilled water. By using these different cooling media, the requirements for material collection and separation can be met, and the overall operating energy consumption of the unit can be reduced. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0013] Figure 2 This is a schematic diagram of the internal structure of the distillation column of this utility model.
[0014] In the diagram: 1. Bottom plate; 2. Reboiler; 3. Distillation column; 4. First-stage cooling tower; 5. Circulating water outlet; 6. Circulating water inlet; 7. Second-stage cooling tower; 8. Chilled water outlet; 9. Chilled water inlet; 10. Collector; 11. Light fraction collection vessel; 12. First pipe; 13. Forward fraction collection vessel; 14. Backward fraction collection vessel; 15. Second pipe; 16. Column section shell; 17. Packing support; 18. Wire mesh structured packing; 19. Seasoning plate; 21. Tubular distributor. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0016] Please see Figures 1 to 2This utility model provides a technical solution: a two-stage cooling distillation apparatus, including a bottom plate 1, a column kettle 2 fixedly connected to the top of the bottom plate 1, a distillation column 3 installed on the column kettle 2, the distillation column 3 consisting of a column section shell 16, a primary cooling column 4, a collector 10 and a secondary cooling column 7, the collector 10 installed at the top of the column section shell 16, the primary cooling column 4 installed inside the column section shell 16 and below the collector 10, the secondary cooling column 7 installed at the top of the collector 10, a chilled water inlet 9 installed on the outside of the secondary cooling column 7, a chilled water outlet 8 fixedly connected to the outside of the secondary cooling column 7 and on the side of the chilled water inlet 9, a circulating water inlet 6 fixedly connected to one side of the primary cooling column 4, and a circulating water outlet 5 fixedly connected to the other side of the primary cooling column 4.
[0017] The first-stage cooling tower 4 is equipped with cooling pipes, and one end of the circulating water inlet 6 and the circulating water outlet 5 are fixedly connected to the front and rear ends of the cooling pipes, respectively. Ordinary circulating water is injected into the cooling pipes inside the first-stage cooling tower 4 through the circulating water inlet 6. The circulating water is discharged through the circulating water outlet 5 into the circulating cooling equipment connected to the circulating water outlet 5 and the circulating water inlet 6 for re-cooling and transportation.
[0018] The secondary cooling tower 7 is equipped with cooling pipes, and one end of the chilled water outlet 8 and the chilled water inlet 9 are fixedly connected to the front and rear ends of the cooling pipes, respectively. Low-temperature chilled water is input into the cooling pipes inside the secondary cooling tower 7 through the chilled water inlet 9. The low-temperature chilled water is discharged through the chilled water outlet 8 into the circulating cooling equipment connected to the chilled water outlet 8 and the chilled water inlet 9 for re-cooling before being transported.
[0019] A light fraction collecting vessel 11 is fixedly connected to the top of the bottom plate 1 and to one side of the column reboiler 2. A front fraction collecting vessel 13 is fixedly connected to the top of the bottom plate 1 and to the other side of the column reboiler 2. A rear fraction collecting vessel 14 is fixedly connected to the top of the bottom plate 1 and to one side of the front fraction collecting vessel 13. The front fraction collecting vessel 13 and the rear fraction collecting vessel 14 are connected to the collecting end of the collector 10 through a second pipe 15. Different components are collected through the front fraction collecting vessel 13 and the rear fraction collecting vessel 14.
[0020] The light fraction collection vessel 11 is connected to the collection end on the top end cap of the secondary cooling tower 7 via the first pipe 12, and the required component substances are collected through the light fraction collection vessel 11.
[0021] The tower section 16 has three packing supports 17 installed inside. Each packing support 17 is topped with wire mesh structured packing 18. Each wire mesh structured packing 18 is topped with a material regulating plate 19. The material regulating plate 19, the packing supports 17 and the wire mesh structured packing 18 form a packing structure. One packing structure is located below the primary cooling tower 4, and the other two packing structures are located between the collector 10 and the primary cooling tower 4. The collector 10 has a tubular distributor 21 installed inside. The gasified material is redistributed through the three packing structures.
[0022] In summary, in this two-stage cooling distillation unit, the material inside the bottom 2 of the column is heated, and the different components of the material vaporize and enter the distillation column 3 for redistribution through the packing structure. Substances with high boiling points are condensed in the first-stage cooling tower 4, generating reflux, while light components with low boiling points are refluxed through the second-stage cooling tower 7. Some liquid is collected after diversion. The second-stage cooling tower 7 uses 5°C low-temperature chilled water as the cooling medium, and the first-stage cooling tower 4 uses circulating cooling water at a temperature of 25-35°C. Different components are collected through the light fraction collection vessel 11, the front fraction collection vessel 13, and the rear fraction collection vessel 14.
[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A two-stage cooling distillation apparatus, comprising a bottom plate (1), characterized in that: The bottom plate (1) is fixedly connected to the top of the column vessel (2), and the column vessel (2) is equipped with a distillation column (3). The distillation column (3) is composed of a column section shell (16), a primary cooling tower (4), a collector (10) and a secondary cooling tower (7). The collector (10) is installed at the top of the column section shell (16). The primary cooling tower (4) is installed inside the column section shell (16) and below the collector (10). The secondary cooling tower (7) is installed at the top of the collector (10). The chilled water inlet (9) is installed on the outside of the secondary cooling tower (7). The chilled water outlet (8) is fixedly connected on the outside of the secondary cooling tower (7) and on the side of the chilled water inlet (9). The circulating water inlet (6) is fixedly connected on one side of the primary cooling tower (4), and the circulating water outlet (5) is fixedly connected on the other side of the primary cooling tower (4).
2. The two-stage cooling distillation apparatus according to claim 1, characterized in that: The primary cooling tower (4) is equipped with cooling pipes, and one end of the circulating water inlet (6) and the circulating water outlet (5) are fixedly connected to the front and rear ends of the cooling pipes, respectively.
3. The two-stage cooling distillation apparatus according to claim 1, characterized in that: The secondary cooling tower (7) is equipped with cooling pipes, and one end of the chilled water outlet (8) and the chilled water inlet (9) are fixedly connected to the front and rear ends of the cooling pipes, respectively.
4. The two-stage cooling distillation apparatus according to claim 1, characterized in that: A light fraction collecting vessel (11) is fixedly connected to the top of the bottom plate (1) and to one side of the column reboiler (2). A front fraction collecting vessel (13) is fixedly connected to the top of the bottom plate (1) and to the other side of the column reboiler (2). A rear fraction collecting vessel (14) is fixedly connected to the top of the bottom plate (1) and to one side of the front fraction collecting vessel (13). The front fraction collecting vessel (13) and the rear fraction collecting vessel (14) are connected to the collecting end of the collector (10) through a second pipe (15).
5. A two-stage cooling distillation apparatus according to claim 4, characterized in that: The light fraction collection vessel (11) is connected to the collection end on the top end cap of the secondary cooling tower (7) via a first pipe (12).
6. The two-stage cooling distillation apparatus according to claim 1, characterized in that: The tower section cylinder (16) is equipped with three packing supports (17). The top of each packing support (17) is provided with wire mesh structured packing (18). The top of each wire mesh structured packing (18) is equipped with a seasoning pressure plate (19). The seasoning pressure plate (19), the packing support (17) and the wire mesh structured packing (18) form a packing structure. One packing structure is located below the primary cooling tower (4), and the other two packing structures are located between the collector (10) and the primary cooling tower (4). The collector (10) is equipped with a tubular distributor (21).