Organic compound rectification separation device

Abstract

The utility model discloses an organic compound rectification separation device, and particularly relates to the technical field of rectification separation, the organic compound rectification separation device comprises a tower body, an interception partition plate is arranged on the upper side of the inner end face of the tower body, a concave air hole is formed in the end face of the interception partition plate, and an air guide pipe is arranged at the upper end of the concave air hole; a third-stage pervaporation membrane, a second-stage pervaporation membrane and a first-stage pervaporation membrane are sequentially arranged on the adjacent end surfaces of the interception partition plate and the sealing top plate from inside to outside. In actual use, in the state that the concave air holes and the air guide pipes are correspondingly arranged, when steam in the tower body rises, light components in organic compounds are gasified and move upwards along with the steam, and the rising steam enters the upper end of the interception partition plate from the concave air holes and the air guide pipes, so that the organic compounds are gasified. Therefore, light components in the steam are fully fused with the trapped fluid, and the light components in the trapped fluid are permeated and filtered.

Description

Technical Field

[0001] This utility model relates to the field of distillation and separation technology, and more specifically, to an organic compound distillation and separation apparatus. Background Technology

[0002] Tower equipment is an important unit operation device in the fields of chemical industry, oil refining, food, metallurgy, medicine and environmental protection. Distillation is a distillation method that uses reflux to separate liquid mixtures to achieve high purity. Distillation column equipment enables full contact between the gas and liquid phases to achieve mass and heat transfer between phases. Vapor permeation is a highly efficient and energy-saving membrane separation technology, particularly suitable for the separation of azeotropic and near-boiling mixtures. Vapor permeation separation technology based on molecular sieve membranes exhibits excellent separation performance in the dehydration process of organic solvents. For example, the prior art patent CN214861272U discloses a multi-component separation device and a distillation column at the top of the column. The multi-component separation device is set at the top of the column. The multi-component separation device includes an upper partition and a lower partition set in the column body, and a separation membrane set between the upper partition and the lower partition. The separation membrane is a tubular pervaporation membrane. The tubular axis of the separation membrane coincides with the axis of the column body. One or more pervaporation membranes are coaxially nested together. The separation membranes are arranged stepwise from the outside to the inside in order of decreasing molecular weight cutoff of the pervaporation membrane. The separation membrane is a tubular membrane whose axis coincides with the axis of the tower body. The separation membrane includes one or more pervaporation membranes coaxially nested together, and the molecular weight cutoff of the pervaporation membranes decreases stepwise from the outside to the inside.

[0003] When the above-mentioned device is in use, the pervaporation membrane can enable the effective separation of each component in a multi-component azeotropic system within a single distillation column, simplifying the separation process of the multi-component azeotropic system and reducing the energy consumption and operating costs of the separation process. However, the lighter components inside the vapor will enter the pervaporation membrane from the separation inlet and cannot be fully mixed with the retentate. The filtration efficiency of the lighter components inside the retentate decreases, thereby affecting the working efficiency of the distillation column. At the same time, it is inconvenient to remove the light component liquid after filtration by the pervaporation membrane. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an organic compound distillation and separation device. The technical problem to be solved by the present invention is: how to increase the efficiency of organic compound distillation and separation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an organic compound distillation and separation device, comprising a column body, wherein a retaining partition plate is provided on the upper side of the inner end face of the column body, a concave vent hole is provided on the end face of the retaining partition plate, a gas guide pipe is provided at the upper end of the concave vent hole, and a three-stage pervaporation membrane, a two-stage pervaporation membrane and a first-stage pervaporation membrane are sequentially provided from the inside to the outside on the adjacent end faces of the retaining partition plate and the sealing top plate;

[0006] The end face of the retaining partition plate is provided with a primary discharge pipe in the gap between the tertiary pervaporation membrane and the secondary pervaporation membrane, the end face of the retaining partition plate is provided with a secondary discharge pipe in the gap between the secondary pervaporation membrane and the primary pervaporation membrane, and a tertiary discharge pipe is provided on the lower side of the primary pervaporation membrane.

[0007] In a preferred embodiment, the lower end of the tower body is provided with a support base, the lower end of the support base is provided with a U-shaped slot, and the upper end of the tower body is provided with an exhaust pipe.

[0008] In a preferred embodiment, a bottom discharge pipe is provided at the middle of the lower end of the support base, a reboil steam inlet pipe is provided on the lower side of the outer end face of the tower body, and a tower tray is provided inside the tower body.

[0009] In a preferred embodiment, a feed pipe is provided on the outer end face of the tower body above the reboiler steam inlet pipe, and a circulating feed pipe is provided on the outer end face of the tower body above the feed pipe.

[0010] In a preferred embodiment, the outer end face of the tower body is provided with a retentate inlet pipe and a retentate circulation outlet pipe on the upper side of the circulating feed pipe, and a liquid receiving tray is provided on one side of the tower tray.

[0011] In a preferred embodiment, the tray has a downcomer at the end away from the receiving tray, and the upper part of the retaining partition plate has a sealing top plate.

[0012] In a preferred embodiment, the intercepting partition plate is arranged in a stepped state in the main viewing direction, the air guide pipe is U-shaped, the primary discharge pipe, the secondary discharge pipe and the tertiary discharge pipe all pass through the end face of the tower body and extend to the outside of the tower body, and the end face of the tower tray is provided with multiple floating valves.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] In actual use, with the corresponding arrangement of the concave vent holes and the gas guide pipe, when the steam inside the tower rises, it will vaporize the lighter components inside the organic compound and move upward with the steam. The rising steam will enter the upper end of the interception partition plate through the concave vent holes and the gas guide pipe, so that the lighter components inside the steam can be fully mixed with the intercepted liquid, thereby permeating and filtering the lighter components inside the intercepted liquid.

[0015] Simultaneously, with the corresponding settings of the retentate inlet pipe, retentate circulation outlet pipe, tertiary pervaporation membrane, secondary pervaporation membrane, and primary pervaporation membrane, the retentate will enter the tower body through the retentate inlet pipe, causing the retentate level to overflow the retentate circulation outlet pipe. The retentate will then be discharged from the retentate circulation outlet pipe, thus forming a circulation between the tower body and the outside of the tower, maintaining the retentate at a suitable height. At the same time, the lighter components inside the retentate will permeate into the interior through the tertiary, secondary, and primary pervaporation membranes, facilitating the separation of multiple lighter components and effectively increasing the efficiency and effectiveness of the separation of multiple lighter components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall front view cross-sectional structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the cross-sectional connection structure of the pervaporation membrane of this utility model.

[0019] Figure 4 This is a schematic diagram of the overall top view cross-sectional structure of this utility model.

[0020] The attached diagram is labeled as follows: 1. Tower body, 2. Support base, 3. U-shaped slot, 4. Reboiler steam inlet pipe, 5. Discharge pipe, 6. Circulating feed pipe, 7. Retained liquid inlet pipe, 8. Retained liquid circulating outlet pipe, 9. Exhaust pipe, 10. Feed pipe, 11. Tray, 12. Liquid receiving tray, 13. Downcomer plate, 14. Retained liquid partition plate, 15. Sealed top plate, 16. Concave vent hole, 17. Three-stage pervaporation membrane, 18. Two-stage pervaporation membrane, 19. One-stage pervaporation membrane, 20. One-stage discharge pipe, 21. Two-stage discharge pipe, 22. Three-stage discharge pipe, 23. Gas guide pipe. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0022] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more exemplary embodiments. Numerous specific details are provided in the following description to give a full understanding of exemplary embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more of the specific details omitted, or other methods, components, steps, etc., can be employed. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0023] This invention provides an organic compound distillation and separation device, such as... Figure 1 and Figure 2 As shown, it includes a tower body 1, with a retaining partition plate 14 on the upper side of the inner end face of the tower body 1, and a support base 2 at the lower end of the tower body 1.

[0024] The lower end of the support base 2 is provided with a U-shaped slot 3, the upper end of the tower body 1 is provided with an exhaust pipe 9, and the middle part of the lower end of the support base 2 is provided with a tower bottom discharge pipe 5, which can facilitate the discharge of the material accumulated on the lower side inside the tower body 1 through the tower bottom discharge pipe 5, thereby facilitating the introduction of the tower bottom material into the reboiler or direct discharge. The lower side of the outer end face of the tower body 1 is provided with a reboiler steam inlet pipe 4, and the steam generated inside the reboiler will enter the interior of the tower body 1 through the reboiler steam inlet pipe 4.

[0025] The tower body 1 is provided with a tray 11 inside, and a feed pipe 10 is provided on the outer end face of the tower body 1 above the reboiler steam inlet pipe 4. A circulating feed pipe 6 is provided on the outer end face of the tower body 1 above the feed pipe 10.

[0026] The outer end face of the tower body 1 is provided with a retentate inlet pipe 7 and a retentate circulation outlet pipe 8 on the upper side of the circulating feed pipe 6. A liquid receiving tray 12 is provided on one side of the tray 11. A downcomer plate 13 is provided at the end of the tray 11 away from the liquid receiving tray 12. Multiple float valves are provided on the end face of the tray 11. The operator introduces the organic compound material into the interior of the tower body 1 through the feed pipe 10. The organic compound material will fall on the upper end of the tray 11 and accumulate at the upper end of the tray 11. It will flow from the tray 11 and the downcomer plate 13 to the lower tray 11. The steam sprayed from the reboiler steam inlet pipe 4 will flow upward from the float valves on the end face of the tray 11, thereby mixing with the organic compound material. The lighter components will be vaporized and will continue to move upward with the steam. The heavier components will flow downward with the material to the lower end of the tower body 1.

[0027] like Figure 3 and Figure 4 As shown, the end face of the interception partition plate 14 is provided with a concave vent hole 16, and the upper end of the concave vent hole 16 is provided with a vent pipe 23. The operator introduces the intercepted liquid into the interior of the tower body 1 through the intercepted liquid inlet pipe 7, and makes the liquid level of the intercepted liquid overflow the intercepted liquid circulation outlet pipe 8. The intercepted liquid circulation outlet pipe 8 will discharge the intercepted liquid inside the tower body 1, forming a circulating flow of the intercepted liquid, thereby maintaining a stable liquid level inside the tower body 1 and keeping the intercepted liquid at a low temperature. The adjacent end faces of the plate 14 and the sealing top plate 15 are provided with a three-stage pervaporation membrane 17, a two-stage pervaporation membrane 18 and a one-stage pervaporation membrane 19 from the inside to the outside. When the vapor containing more light components rises continuously, it will enter the upper end of the interception partition plate 14 through the concave vent 16 and the air guide pipe 23, so that the vapor and the interception liquid are fully mixed. The lighter components will seep into the interior of the interception liquid through the three-stage pervaporation membrane 17, the two-stage pervaporation membrane 18 and the one-stage pervaporation membrane 19, thereby separating the multiple lighter components.

[0028] The end face of the interception partition plate 14 is provided with a primary discharge pipe 20 in the gap between the tertiary pervaporation membrane 17 and the secondary pervaporation membrane 18, and the end face of the interception partition plate 14 is provided with a secondary discharge pipe 21 in the gap between the secondary pervaporation membrane 18 and the primary pervaporation membrane 19.

[0029] The lower side of the primary pervaporation membrane 19 is provided with a tertiary discharge pipe 22. The molecular weight cutoff of the tertiary pervaporation membrane 17, the secondary pervaporation membrane 18 and the primary pervaporation membrane 19 decreases progressively from the outside to the inside. The upper end of the retention partition plate 14 is provided with a sealing top plate 15. The cross-section of the retention partition plate 14 in the main viewing direction is set in a stepped state. When a certain amount of lighter components are separated and filtered inside the tertiary pervaporation membrane 17, the secondary pervaporation membrane 18 and the primary pervaporation membrane 19, the lighter components can be discharged from the corresponding primary discharge pipe 20, the secondary discharge pipe 21 and the tertiary discharge pipe 22.

[0030] The air guide pipe 23 is U-shaped. The first-stage discharge pipe 20, the second-stage discharge pipe 21 and the third-stage discharge pipe 22 all pass through the end face of the tower body 1 and extend to the outside of the tower body 1.

[0031] Finally, it should be noted that: the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An organic compound distillation and separation apparatus, comprising a column body (1), characterized in that: The upper side of the inner end face of the tower body (1) is provided with a retaining partition plate (14). The end face of the retaining partition plate (14) is provided with a concave vent hole (16). The upper end of the concave vent hole (16) is provided with a gas guide pipe (23). The adjacent end faces of the retaining partition plate (14) and the sealing top plate (15) are provided with a three-stage pervaporation membrane (17), a two-stage pervaporation membrane (18) and a one-stage pervaporation membrane (19) from the inside to the outside. The end face of the interception partition plate (14) is provided with a primary discharge pipe (20) in the gap between the tertiary pervaporation membrane (17) and the secondary pervaporation membrane (18), the end face of the interception partition plate (14) is provided with a secondary discharge pipe (21) in the gap between the secondary pervaporation membrane (18) and the primary pervaporation membrane (19), and a tertiary discharge pipe (22) is provided on the lower side of the primary pervaporation membrane (19).

2. The organic compound distillation and separation apparatus according to claim 1, characterized in that: The lower end of the tower body (1) is provided with a support base (2), the lower end of the support base (2) is provided with a U-shaped slot (3), and the upper end of the tower body (1) is provided with an exhaust pipe (9).

3. The organic compound distillation and separation apparatus according to claim 2, characterized in that: The support base (2) is provided with a tower bottom discharge pipe (5) at the middle of its lower end, and a reboil steam inlet pipe (4) is provided on the lower side of the outer end face of the tower body (1). The tower body (1) is provided with a tower tray (11) inside.

4. The organic compound distillation and separation apparatus according to claim 3, characterized in that: The outer end face of the tower body (1) is provided with a feed pipe (10) above the reboiling steam inlet pipe (4), and the outer end face of the tower body (1) is provided with a circulating feed pipe (6) above the feed pipe (10).

5. The organic compound distillation and separation apparatus according to claim 4, characterized in that: The outer end face of the tower body (1) is provided with a truncation liquid inlet pipe (7) and a truncation liquid circulation outlet pipe (8) on the upper side of the circulating feed pipe (6), and a liquid receiving plate (12) is provided on one side of the tower tray (11).

6. The organic compound distillation and separation apparatus according to claim 3, characterized in that: The tray (11) has a downcomer (13) at one end away from the receiving tray (12), and a sealing top plate (15) is provided on the outside of the upper end of the interception partition plate (14).

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