Dehydration device for tetrahydrofuran membrane

Abstract

The utility model relates to the technical field of tetrahydrofuran production, in particular to a dehydration device for a tetrahydrofuran membrane, which comprises a treatment box and a feed pipe, a bottom plate frame is arranged at the bottom of the inner side of the treatment box, a fixing sleeve is arranged at the middle end of the top wall of the bottom plate frame, a dehydration cylinder is arranged on the inner side of the fixing sleeve, and the feed pipe is arranged in the dehydration cylinder. A pervaporation membrane cylinder is embedded in the inner side of the dehydration cylinder, a feeding pipe surrounds the outer wall of the pervaporation membrane cylinder, the top of the feeding pipe is connected with a feeding connecting pipe, the top of the feeding connecting pipe is connected with a mixing box, a cleaning cover plate is mounted at the top of the mixing box, and a discharging nozzle is mounted at the bottom of the middle end of the mixing box; the tetrahydrofuran solvent dehydration device solves the problems that in the prior art, when an existing device performs dehydration treatment on a tetrahydrofuran solvent, due to the fact that impurities or water are contained in tetrahydrofuran, the dissolving performance of the tetrahydrofuran can be influenced, precipitates are generated in the dissolving process, the solvent is easily mixed unevenly when the tetrahydrofuran solvent is fed, and the dehydration effect is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of tetrahydrofuran production, in particular to a dehydration device for tetrahydrofuran membrane. Background Art

[0002] Tetrahydrofuran is an important organic compound belonging to the ether class. It is the complete hydrogenation product of furan and is mainly used as a solvent, especially a medium polar aprotic solvent. It is widely used in organic synthesis reactions such as Grignard reaction, metal catalytic reaction, esterification reaction, etc. In the synthesis reaction of tetrahydrofuran, the tetrahydrofuran solvent is dehydrated to increase the concentration requirement of tetrahydrofuran.

[0003] When the existing device dehydrates tetrahydrofuran solvent, since tetrahydrofuran contains impurities or water, its solubility will be affected, resulting in precipitation during the dissolution process. Therefore, when the tetrahydrofuran solvent is added, the solvent is easily mixed unevenly, affecting the dehydration effect.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a dehydration device for tetrahydrofuran membrane is proposed, in order to achieve a more practical purpose. Utility Model Content

[0005] The utility model aims to provide a dehydration device for tetrahydrofuran membrane to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dehydration device for tetrahydrofuran membrane, comprising a treatment box and a feed pipe, a bottom plate frame is provided at the inner bottom of the treatment box, and a fixed sleeve is provided at the middle end of the top wall of the bottom plate frame, a dehydration cylinder is provided on the inner side of the fixed sleeve, and a pervaporation membrane cylinder is embedded on the inner side of the dehydration cylinder, the outer wall of the pervaporation membrane cylinder is surrounded by the feed pipe, and the top of the feed pipe is connected to a feed connecting pipe, the top of the feed connecting pipe is connected to a mixing box, and a cleaning cover is installed on the top of the mixing box, a discharge nozzle is installed at the middle bottom of the mixing box, and a control valve is installed at the middle end of the discharge nozzle, a feed pump is connected to the outside of the feed pipe, an air suction filter is provided on one side of the top of the dehydration cylinder, and a vacuum pump is extended to the outside of the air suction filter.

[0007] Furthermore, a chimeric outer cylinder is sleeved on the outer side of the pervaporation membrane cylinder, a top wall of the chimeric outer cylinder is provided with an inner slope, a connecting rod is provided at the middle of the top end of the pervaporation membrane cylinder, and a filter screen is provided on the top of the connecting rod.

[0008] Furthermore, the filter screen plate is detachably arranged in a horizontal shape, and the sizes of the filter screen plate and the dehydration cylinder match each other.

[0009] Furthermore, the pervaporation membrane cylinder is fitted with the inner wall of the dehydration cylinder by means of an embedded outer cylinder.

[0010] Furthermore, a discharge valve pipe extends from the bottom of the pervaporation membrane cartridge.

[0011] Furthermore, support frames are provided on both sides of the processing box.

[0012] Furthermore, the feed pipe is distributed in a spiral shape as a whole, and the feed pipe is interconnected with the mixing box through the feed pipe connection.

[0013] The utility model provides a dehydration device for tetrahydrofuran membrane, which has the following beneficial effects:

[0014] 1. The utility model extends the material delivery channel so that the medicine can be mixed during the transmission, and cooperates with the mixing box on the top to make the liquid medicine more uniform, so as to avoid affecting the subsequent membrane dehydration operation;

[0015] The spiral feeding tube does not affect the device space while ensuring a long feeding channel. The upward feeding method can better control the feeding speed and avoid uncontrollable dosage of medicine in the spiral tube.

[0016] 2. In the utility model, the pervaporation membrane cartridge adopts an embedded structure and is placed inside the dehydration cartridge. A filter screen is provided on the top to remove impurities in the solvent, thereby facilitating processing through the separation membrane in the pervaporation membrane cartridge at the bottom, thereby achieving the best separation effect and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the internal cross-sectional structure of a dehydration device for tetrahydrofuran membrane of the utility model;

[0019] Figure 2 This is a schematic diagram of the top view of the feed pipe of a dehydration device for tetrahydrofuran membrane of the utility model;

[0020] Figure 3 The utility model is a schematic diagram of the three-dimensional structure of a pervaporation membrane cartridge of a dehydration device for tetrahydrofuran membrane.

[0021] In the figure: 1. treatment box; 2. support frame; 3. vacuum pump; 4. suction filter; 5. feed pump; 6. feed pipe; 601. mixing box; 602. cleaning cover plate; 603. control valve; 604. discharge nozzle; 605. feed pipe; 7. pervaporation membrane cylinder; 701. embedded outer cylinder; 702. inner slope; 703. connecting rod; 704. filter screen; 8. dehydration cylinder; 9. fixing sleeve; 10. bottom plate frame; 11. discharge valve pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 The utility model provides a technical solution: a dehydration device for tetrahydrofuran membrane, comprising a treatment box 1 and a feed pipe 6, a bottom plate frame 10 is arranged at the inner bottom of the treatment box 1, and a fixing sleeve 9 is arranged at the middle end of the top wall of the bottom plate frame 10, a dehydration cylinder 8 is arranged on the inner side of the fixing sleeve 9, and a pervaporation membrane cylinder 7 is embedded in the inner side of the dehydration cylinder 8, the outer wall of the pervaporation membrane cylinder 7 is surrounded by a feed pipe 6, and a feed pipe 605 is connected to the top of the feed pipe 6, a mixing box 601 is connected to the top of the feed pipe 605, and a cleaning cover 602 is installed on the top of the mixing box 601, a discharge nozzle 604 is installed at the middle bottom of the mixing box 601, and a control valve 603 is installed at the middle end of the discharge nozzle 604, a feed pump 5 is connected to the outer side of the feed pipe 6, and a side of the top of the dehydration cylinder 8 An air suction filter 4 is provided, and a vacuum pump 3 is extended and connected to the outer side of the air suction filter 4; an outer side of the pervaporation membrane cylinder 7 is sleeved with an embedded outer cylinder 701, and the top wall of the embedded outer cylinder 701 is provided with an inner slope surface 702, a connecting rod 703 is provided in the middle of the top end of the pervaporation membrane cylinder 7, and a filter screen plate 704 is provided on the top of the connecting rod 703; the filter screen plate 704 is detachably arranged in a horizontal state, and the sizes of the filter screen plate 704 and the dehydration cylinder 8 match each other; the pervaporation membrane cylinder 7 is fitted with the inner wall of the dehydration cylinder 8 through the embedded outer cylinder 701; a discharge valve pipe 11 is extended from the bottom of the pervaporation membrane cylinder 7; support frames 2 are provided on both sides of the processing box 1; the feed pipe 6 is distributed in a spiral shape as a whole, and the feed pipe 6 is connected to the mixing box 601 through the feed connecting pipe 605;

[0024] By extending the feeding pipe 6 channel for conveying materials, the medicine can be mixed when being transported in the feeding pipe 6, and the mixing box 601 at the top can make the medicine liquid more uniform, so that the medicine can be stored in the mixing box 601 and discharged from the discharge nozzle 604. When discharging, the discharge rate can be adjusted through the control valve 603 according to the dehydration rate to avoid affecting the subsequent membrane dehydration operation;

[0025] The spiral feeding tube 6 does not affect the device space while ensuring a long feeding channel. The upward feeding method can better control the feeding speed and avoid the uncontrollable amount of medicine in the spiral tube.

[0026] Placing the feed pipe 6 in the inner space of the processing box 1 and the dehydration cylinder 8 can also protect the feed pipe 6, reduce contact with the outside world, and extend its service life;

[0027] The pervaporation membrane cartridge 7 adopts an embedded structure and is placed inside the dehydration cartridge 8. A filter screen 704 is provided on the top to remove impurities in the solvent, so as to facilitate processing through the separation membrane in the pervaporation membrane cartridge 7 at the bottom, thereby achieving the best separation effect and economic benefits.

[0028] When the pervaporation membrane cartridge 7 is disassembled, its bottom can be disassembled through the bottom plate frame 10 at the bottom, so that the pervaporation membrane cartridge 7 in the dehydration cartridge 8 can be replaced.

[0029] Working principle: For this type of tetrahydrofuran membrane dehydration device, first, the vacuum pump 3 on the support frame 2 is started through the support frame 2 at one end of the outer side of the processing box 1, so that the vacuum pump 3 passes through the embedded suction filter 4 to evacuate the gas in the dehydration cylinder 8, and then the outer feed pump 5 is controlled to extract the tetrahydrofuran solvent from the spiral feed pipe 6, so that the solvent is gradually transmitted to the mixing box 601, and then through the control valve 603 at the top of the mixing box 601, the solvent is transmitted downward from the discharge nozzle 604, and then enters the dehydration cylinder 8, so that the agent is transmitted to the pervaporation membrane cylinder 7 in the dehydration cylinder 8, first through the uppermost filter screen plate 704 for filtration, and then along the inner slope 702 of the pervaporation membrane cylinder 7 for transmission, so as to use the pervaporation membrane cylinder 7 to perform membrane separation treatment on the tetrahydrofuran solvent, and finally the filtered solvent is discharged from the discharge valve pipe 11 at the bottom.

[0030] The above description is only a specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be thought of by any technician familiar with the field within the technical scope disclosed by the utility model without creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A dehydration device for tetrahydrofuran membrane, comprising a treatment box (1) and a feed pipe (6), characterized in that: A bottom plate frame (10) is provided at the bottom of the inner side of the treatment box (1), and a fixing sleeve (9) is provided at the middle end of the top wall of the bottom plate frame (10), a dehydration cylinder (8) is provided on the inner side of the fixing sleeve (9), and a pervaporation membrane cylinder (7) is embedded on the inner side of the dehydration cylinder (8), a feed pipe (6) is surrounded by the outer wall of the pervaporation membrane cylinder (7), and a feed pipe (605) is connected to the top of the feed pipe (6), and a feed pipe (605) is connected to the top of the feed pipe (605). A mixing box (601) is provided, and a cleaning cover plate (602) is installed on the top of the mixing box (601); a discharge nozzle (604) is installed at the bottom of the middle end of the mixing box (601), and a control valve (603) is installed at the middle end of the discharge nozzle (604); a feed pump (5) is connected to the outer side of the feed pipe (6); an air suction filter (4) is provided on one side of the top of the dehydration cylinder (8), and a vacuum pump (3) is extended to the outer side of the air suction filter (4).

2. A dehydration device for tetrahydrofuran membrane according to claim 1, characterized in that: The outer side of the pervaporation membrane cylinder (7) is sleeved with an embedded outer cylinder (701), the top wall of the embedded outer cylinder (701) is provided with an inner slope surface (702), a connecting rod (703) is provided at the middle of the top end of the pervaporation membrane cylinder (7), and a filter screen plate (704) is provided at the top of the connecting rod (703).

3. A dehydration device for tetrahydrofuran membrane according to claim 2, characterized in that: The filter screen plate (704) is detachably arranged in a horizontal position, and the sizes of the filter screen plate (704) and the dehydration cylinder (8) match each other.

4. A dehydration device for tetrahydrofuran membrane according to claim 2, characterized in that: The pervaporation membrane cylinder (7) is fitted to the inner wall of the dehydration cylinder (8) by means of an interlocking outer cylinder (701).

5. A dehydration device for tetrahydrofuran membrane according to claim 1, characterized in that: A discharge valve pipe (11) extends from the bottom of the pervaporation membrane cartridge (7).

6. A dehydration device for tetrahydrofuran membrane according to claim 1, characterized in that: Support frames (2) are provided on both sides of the processing box (1).

7. A dehydration device for tetrahydrofuran membrane according to claim 1, characterized in that: The feed pipe (6) is distributed in a spiral shape as a whole, and the feed pipe (6) is connected to the mixing box (601) through the feed pipe (605).

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