Pure medium continuous rectification device

Abstract

The utility model relates to the technical field of rectification equipment, in particular to a pure medium continuous rectification device which comprises a feeding pipe, a first tower kettle and a second tower kettle, a liquid level sensor is arranged in the first tower kettle, one end of a first stop valve is fixedly connected with a main pipeline, and a first magnetic gear pump is arranged in the main pipeline. An auxiliary pipeline is fixedly connected to the outer portion of the pressure gauge, a second magnetic gear pump is arranged in the auxiliary pipeline, and a backflow pipeline is arranged between outlets of the first magnetic gear pump and the second magnetic gear pump and an inlet of the main pipeline. Raw materials enter the first-stage rectification unit through a feeding pipe, the raw materials with light components removed flow through a main pipeline and an auxiliary pipeline at the bottom end of a first tower kettle, the raw materials with the light components removed are conveyed into the second-stage rectification unit through magnetic gear pumps, and when the outlet pressure of the first magnetic gear pump and the outlet pressure of the second magnetic gear pump are too high, pressure relief is conducted through a backflow pipeline, and rectification is conducted. And overpressure of the second-stage rectification unit is prevented, the device is suitable for rectification of pure media, and the stability of material conveying in continuous rectification is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation equipment, in particular to a pure medium continuous distillation device. Background Art

[0002] Currently, the liquid source purification method in the market mostly adopts continuous distillation process. The continuous distillation process has very high requirements on the stability of the distillation system during the distillation process. Due to the dangerousness of special products, only imported reciprocating diaphragm pumps and bellows pumps can meet the product's requirements for equipment stability, cleanliness, sealing and corrosion resistance during the product feeding and transportation process. However, diaphragm pumps are pulse feeders, which will produce unstable factors and require continuous distillation equipment for distillation.

[0003] In the prior art, for example, patent publication number CN202786064U discloses a purification device for ultra-high-purity butyl acetate, comprising a distillation tower connected to a storage tank, wherein a high-boiling-point substance outlet is provided at the bottom of the distillation tower, and a top outlet is further provided on the distillation tower. The top outlet of the distillation tower is sequentially connected in series to a condenser, a quality inspection mixing tank, a microfilter, and a finished product tank through a pipeline. A pretreatment reactor and a filter are sequentially connected between the storage tank and the distillation tower. The outlet of the filter is connected to the feed port of the distillation tower through a pipeline, and the feed port of the distillation tower is provided with a sealing valve.

[0004] The above structure can improve the purity of the incoming distillation, but in the process of continuous distillation, the material is not stable enough during transportation, which affects the distillation effect of the pure medium. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a pure medium continuous distillation device to solve the problem that during the continuous distillation process, the material is not stable enough during transportation, which affects the effect of the pure distillation equipment.

[0006] Based on the above purpose, the utility model provides a pure medium continuous distillation device, including a feed pipe, a tower kettle 1 and a tower kettle 2, wherein the feed pipe, the tower kettle 1 and the tower kettle 2 are connected by a pipeline, the top inlet of the tower kettle 1 is fixedly connected to a first-stage distillation unit, the inlet of the first-stage distillation unit is fixedly connected to the feed pipe, and the top pipeline of the tower kettle 2 is fixedly connected to a second-stage distillation unit; a shut-off valve 1 is fixedly installed at the outlet of the tower kettle 1, and a liquid level sensor is provided inside the tower kettle 1, and one end of the shut-off valve 1 is fixedly installed. It is connected to a main pipeline, the other end of which is connected to a secondary distillation unit; a magnetic gear pump 1 is provided inside the main pipeline, and a secondary pipeline is fixedly connected to the outside of the pressure vessel, a magnetic gear pump 2 is provided inside the secondary pipeline, filters are provided at the inlets of the magnetic gear pump 1 and the magnetic gear pump 2, a reflux pipeline is provided between the outlets of the magnetic gear pump 1 and the magnetic gear pump 2 and the inlet of the main pipeline, a shut-off valve 2 is fixedly installed at the outlet of the tower kettle 2, and a kettle residue transfer pipe is fixedly installed at one end of the shut-off valve 2.

[0007] Preferably, the first-stage distillation unit includes a light component removal tower connected to the bottom of the tower, a side pipe of the light component removal tower is fixedly connected to a light component removal tower condenser, and a side pipe of the light component removal tower condenser is fixedly connected to a light component receiving pipe.

[0008] Preferably, a flow controller four is provided between the light removal tower condenser and the light component receiving pipe, the light removal tower and the light component receiving pipe are connected by a pipeline, and a flow controller one is provided between the light removal tower and the light component receiving pipe.

[0009] Preferably, the secondary distillation unit includes a deweighting tower connected to the second tower kettle, a pipe on one side of the deweighting tower is fixedly connected to a deweighting tower condenser, and a pipe on one side of the deweighting tower condenser is fixedly connected to a product receiving pipe.

[0010] Preferably, a flow controller five is provided between the deweighting tower condenser and the product receiving pipe, the deweighting tower and the product receiving pipe are connected by a pipeline, and a flow controller two is provided between the deweighting tower and the product receiving pipe.

[0011] Preferably, a relief valve is provided on the return pipe, and relief valves are provided on the pipes connecting the outlets of the magnetic gear pump 1 and the magnetic gear pump 2 and the return pipe; a pressure gauge and a flow controller 3 are provided on the main pipe, and multiple sets of relief valves are provided on the main pipe and the auxiliary pipe.

[0012] The beneficial effects of the utility model are as follows: the raw materials enter the primary distillation unit through the feed pipe, the light components are removed through the primary distillation unit, the raw materials with the light components removed flow through the main pipeline and the auxiliary pipeline at the bottom end of the tower kettle, the raw materials with the light components removed are transported to the secondary distillation unit by the magnetic gear pump 1 and the magnetic gear pump 2, and the heavy components are removed by the secondary distillation unit; when the outlet pressure of the magnetic gear pump 1 and the magnetic gear pump 2 is too high, the reflux pipeline is used to release the pressure to prevent the secondary distillation unit from overpressure, which is suitable for the distillation of pure media and improves the stability of material transportation in continuous distillation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model; Figure 2 This is a schematic diagram of the connection between the main pipeline, auxiliary pipeline and return pipeline of the utility model.

[0015] The markings in the figure are: 1. Feed pipe; 2. Light-removal tower; 3. Tower bottom 1; 4. Liquid level sensor; 5. Shut-off valve 1; 6. Flow controller 1; 7. Light-removal tower condenser; 8. Flow controller 4; 9. Light component receiving pipe; 10. Filter; 11. Flow controller 3; 12. Magnetic gear pump 1; 13. Magnetic gear pump 2; 14. Unloading valve; 15. Heavy-removal tower; 16. Tower bottom 2; 17. Shut-off valve 2; 18. Kettle residue transfer pipe; 19. Flow controller 2; 20. Heavy-removal tower condenser; 21. Flow controller 5; 22. Product receiving pipe; 23. Pressure vessel; 24. Reflux pipe; 25. Main pipe; 26. Auxiliary pipe. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0017] like Figure 1 、 Figure 2As shown, a pure medium continuous distillation device includes a feed pipe 1, a tower kettle 3 and a tower kettle 2 16. The feed pipe 1, the tower kettle 3 and the tower kettle 2 16 are connected by a pipeline. The pipeline at the top inlet of the tower kettle 3 is fixedly connected to a first-stage distillation unit, the inlet of the first-stage distillation unit is fixedly connected to the feed pipe 1, and the top pipeline of the tower kettle 2 16 is fixedly connected to a second-stage distillation unit; a shut-off valve 5 is fixedly installed at the outlet of the tower kettle 3, and a liquid level sensor 4 is provided inside the tower kettle 3. One end of the shut-off valve 5 is fixedly connected to a main pipeline 25. The main pipeline 25 is fixedly connected to the outlet of the tower kettle 3. The other end is connected to the secondary distillation unit; a magnetic gear pump 12 is provided inside the main pipeline 25, and a secondary pipeline 26 is fixedly connected to the outside of the pressure vessel 23, a magnetic gear pump 13 is provided inside the secondary pipeline 26, and filters 10 are provided at the inlets of the magnetic gear pump 12 and the magnetic gear pump 13. A reflux pipeline 24 is provided between the outlets of the magnetic gear pump 12 and the magnetic gear pump 13 and the inlet of the main pipeline 25, and a shut-off valve 17 is fixedly installed at the outlet of the tower kettle 16, and a kettle residue transfer pipe 18 is fixedly installed at one end of the shut-off valve 17.

[0018] In this embodiment, the raw material enters the primary distillation unit through the feed pipe 1, and the light components are removed by the primary distillation unit. The raw material with the light components removed flows through the main pipeline 25 and the auxiliary pipeline 26 at the bottom of the tower reactor 3. The raw material with the light components removed is transported to the secondary distillation unit by using the magnetic gear pump 12 and the magnetic gear pump 2 13, and the heavy components are removed by the secondary distillation unit. When the outlet pressure of the magnetic gear pump 12 and the magnetic gear pump 2 13 is too high, the reflux pipeline 24 is used to release the pressure to prevent the secondary distillation unit from overpressure. This is suitable for the distillation of pure media and improves the stability of material transportation in continuous distillation.

[0019] As an implementation method, Figure 1 、 Figure 2 As shown, the first-stage distillation unit includes a light component removal tower 2 connected to the tower bottom 3, a pipeline on one side of the light component removal tower 2 is fixedly connected to a light component removal tower condenser 7, and a pipeline on one side of the light component removal tower condenser 7 is fixedly connected to a light component receiving pipe 9.

[0020] Among them, a flow controller four 8 is provided between the light removal tower condenser 7 and the light component receiving pipe 9, the pipeline between the light removal tower 2 and the light component receiving pipe 9 is connected, and a flow controller one 6 is provided between the light removal tower 2 and the light component receiving pipe 9.

[0021] In this embodiment, the raw material enters the light component removal tower 2 through the feed pipe 1, and the light component in the mixture is volatilized under specific conditions in the light component removal tower 2. The light component is then separated out by the light component removal tower condenser 7 and collected by the light component receiving pipe 9. At the same time, during the separation process, the flow rate of the light component in the pipeline is controlled by the flow controller 48 and the flow controller 16; the flow rate of the light component is received by the flow controller 48. When the flow rate is too large, it refluxes between the light component removal tower 2 and the light component receiving pipe 9 and is controlled by the flow controller 6.

[0022] As an implementation method, Figure 1 、 Figure 2 As shown, the secondary distillation unit includes a deweighting tower 15 connected to the second tower kettle 16, a pipeline on one side of the deweighting tower 15 is fixedly connected to a deweighting tower condenser 20, and a pipeline on one side of the deweighting tower condenser 20 is fixedly connected to a product receiving pipe 22.

[0023] Among them, a flow controller five 21 is provided between the deweighting tower condenser 20 and the product receiving pipe 22, the pipeline between the deweighting tower 15 and the product receiving pipe 22 is connected, and a flow controller two 19 is provided between the deweighting tower 15 and the product receiving pipe 22.

[0024] In this embodiment, the raw material with light components removed enters the deweighting tower 15 through the main pipeline 25, and the heavy components in the mixture are separated in the deweighting tower 15 to remove the components heavier than the target substance. The heavy components are then separated out through the deweighting tower condenser 20 and collected through the product receiving pipe 22. At the same time, during the separation process, the flow rate after the light components and heavy components are removed is controlled by the flow controller five 21. When the flow rate is too large, it refluxes between the deweighting tower 15 and the product receiving pipe 22 and is controlled by the flow controller two 19.

[0025] As an implementation method, Figure 2 As shown, a relief valve 14 is provided on the return pipe 24, and relief valves 14 are provided on the pipes connecting the outlets of the magnetic gear pump 1 12 and the magnetic gear pump 2 13 with the return pipe 24; a pressure device 23 and a flow controller 3 11 are provided on the main pipe 25, and multiple groups of relief valves 14 are provided on the main pipe 25 and the auxiliary pipe 26.

[0026] In this embodiment, a flow controller three 11 is provided in the main pipeline 25 between the outlets of the magnetic gear pump one 12, the magnetic gear pump two 13 and the secondary distillation unit. At the same time, a return pipe 24 at the outlets of the magnetic gear pump one 12, the magnetic gear pump two 13 is used for pressure relief, and a relief valve 14 is installed at the inlet to further limit the magnetic gear pump one 12, the magnetic gear pump two 13 to ensure the stability of the secondary distillation unit.

[0027] Among them, the liquid level sensor 4, the magnetic gear pump 1 12, the magnetic gear pump 2 13, the shut-off valve 1 5 and the flow controller 3 11 are electrically connected, and the pressure device 23 is electrically connected to the unloading valve 14 on the return pipe 24.

[0028] In this embodiment, when the liquid level in the tower reactor 3 drops to a low liquid level, the liquid level sensor 4 triggers the shut-off valve 15 and the magnetic gear pump 12 and the magnetic gear pump 2 to automatically close, and the pressure gauge 23 monitors the outlet pressure of the magnetic gear pump 12 and the magnetic gear pump 2 13. When the outlet pressure of the magnetic gear pump 12 and the magnetic gear pump 2 13 is too high, the pressure relief reflux pipe 24 and the internal unloading valve 14 are automatically opened to relieve pressure to prevent overpressure in the secondary distillation unit. This embodiment is suitable for the distillation of pure media, especially for distillation and conveying systems with extremely high requirements on material purity, equipment sealing, and corrosion resistance.

[0029] As an implementation method, during the continuous distillation process, the distillation material is required to be stably fed from the light removal tower 2 to the heavy removal tower 15 using a gear delivery pump. The gear pump feed flow rate range is 10~20kg / h, the liquid level of the tower bottom 3 is maintained at 60~70%, the opening pressure of the unloading valve 14 in the reflux pipe 24 is 7bar, and the pressure of the bottom of the heavy removal tower 15 is 107~112Kpa. During the distillation process, the gear pump adjusts the output frequency according to the flow displayed by multiple flow controllers in the whole to stabilize the delivery flow at 20 kg / h, the outlet pressure of the magnetic gear pump 12 and the magnetic gear pump 2 13 remains unchanged, and the pressure of the heavy removal tower 15 and the tower bottom 2 16 can also be maintained within a stable range.

[0030] Working principle: When in use, the raw material enters the light component removal tower 2 through the feed pipe 1, and the light component in the mixture is volatilized under specific conditions in the light component removal tower 2, and then the light component is separated out through the light component removal tower condenser 7, and then collected through the light component receiving pipe 9. At the same time, during the separation process, the flow controller 24 8 and the flow controller 16 are used to control the flow of the light component in the pipeline. When the flow is too large, it refluxes between the light component removal tower 2 and the light component receiving pipe 9 and is controlled by the flow controller 16; the raw material with the light component removed flows through the main pipeline 25 and the auxiliary pipeline 26 at the bottom of the tower reactor 3, and the magnetic force is used to remove the light component. Gear pump 12 and magnetic gear pump 2 13 transport the raw material with light components removed to the de-weighting tower 15. Flow controller 3 11 is used to adjust the feed flow rate. The heavy components in the mixture are separated in the de-weighting tower 15 to remove components heavier than the target substance. The heavy components are then separated by de-weighting tower condenser 20 and collected through product receiving pipe 22. At the same time, during the separation process, if the flow rate is too large, it refluxes between the de-weighting tower 15 and the product receiving pipe 22 and is controlled by flow controller 2 19. The excess other components or the residual liquid in the tower bottom are transferred through the bottom end of the tower bottom 2 16 through the bottom residual transfer pipe 18.

[0031] When the liquid level in the tower bottom 3 drops to the low liquid level, the liquid level sensor 4 triggers the shut-off valve 15 and the magnetic gear pump 12 and the magnetic gear pump 2 13 to close automatically. When the outlet pressure of the magnetic gear pump 12 and the magnetic gear pump 2 13 is too high, the reflux pipe 24 is depressurized and the internal unloading valve 14 is automatically opened to relieve the pressure to prevent the secondary distillation unit from overpressure. It is suitable for the distillation of pure media and is suitable for distillation and conveying systems with extremely high requirements on material purity, equipment sealing and corrosion resistance.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0033] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A pure medium continuous distillation device, comprising a feed pipe (1), a tower bottom 1 (3) and a tower bottom 2 (16), wherein the feed pipe (1), the tower bottom 1 (3) and the tower bottom 2 (16) are all connected by a pipeline, characterized in that: The pipeline at the top inlet of the tower kettle (3) is fixedly connected to a first-stage distillation unit, and the inlet of the first-stage distillation unit is fixedly connected to the feed pipe (1). The pipeline at the top of the tower kettle (16) is fixedly connected to a second-stage distillation unit; a shut-off valve (5) is fixedly installed at the outlet of the tower kettle (3), and a liquid level sensor (4) is provided inside the tower kettle (3); one end of the shut-off valve (5) is fixedly connected to a main pipeline (25), and the other end of the main pipeline (25) is communicated with the second-stage distillation unit; a magnetic gear pump (12) is provided inside the main pipeline (25). , and the outside of the pressure vessel (23) is fixedly connected to a secondary pipeline (26), the interior of the secondary pipeline (26) is provided with a magnetic gear pump 2 (13), the inlets of the magnetic gear pump 1 (12) and the magnetic gear pump 2 (13) are both provided with filters (10), a reflux pipeline (24) is provided between the outlets of the magnetic gear pump 1 (12) and the magnetic gear pump 2 (13) and the inlet of the main pipeline (25), the outlet of the tower reactor 2 (16) is fixedly provided with a shut-off valve 2 (17), and one end of the shut-off valve 2 (17) is fixedly provided with a reactor residue transfer pipe (18).

2. A pure medium continuous distillation device according to claim 1, characterized in that: The first-stage distillation unit comprises a light component removal tower (2) connected to a tower bottom (3), a light component removal tower condenser (7) is fixedly connected to a pipeline on one side of the light component removal tower (2), and a light component receiving pipe (9) is fixedly connected to a pipeline on one side of the light component removal tower condenser (7).

3. A pure medium continuous distillation device according to claim 2, characterized in that: A flow controller four (8) is provided between the light removal tower condenser (7) and the light component receiving pipe (9), a pipeline is connected between the light removal tower (2) and the light component receiving pipe (9), and a flow controller one (6) is provided between the light removal tower (2) and the light component receiving pipe (9).

4. A pure medium continuous distillation device according to claim 1, characterized in that: The secondary distillation unit comprises a deweighting tower (15) connected to the second tower kettle (16), a pipeline on one side of the deweighting tower (15) is fixedly connected to a deweighting tower condenser (20), and a pipeline on one side of the deweighting tower condenser (20) is fixedly connected to a product receiving pipe (22).

5. A pure medium continuous distillation device according to claim 4, characterized in that: A flow controller five (21) is provided between the deweighting tower condenser (20) and the product receiving pipe (22), a pipeline is connected between the deweighting tower (15) and the product receiving pipe (22), and a flow controller two (19) is provided between the deweighting tower (15) and the product receiving pipe (22).

6. A pure medium continuous distillation device according to claim 1, characterized in that: The return pipe (24) is provided with a relief valve (14), and the outlets of the magnetic gear pump 1 (12) and the magnetic gear pump 2 (13) and the pipes connecting to the return pipe (24) are both provided with relief valves (14); the main pipe (25) is provided with a pressure device (23) and a flow controller 3 (11), and the main pipe (25) and the auxiliary pipe (26) are both provided with multiple sets of relief valves (14).

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