Tetrahydrofuran dehydration adsorbent regeneration device

Abstract

The utility model discloses a tetrahydrofuran dehydration adsorbent regeneration device which comprises a base, the bottom of the base is fixedly connected with supporting legs, the top of the base is fixedly connected with a storage barrel, one side of the storage barrel is fixedly connected with a discharge port, the top of the discharge port is provided with a first valve, and the top of the discharge port is provided with a second valve. A lower flange is fixedly connected to the top of the storage barrel, an upper flange is movably connected to the top of the lower flange, a heating barrel is fixedly connected to the top of the upper flange, a heating device is arranged on the inner wall of the heating barrel, a supporting column is fixedly connected to the top of the heating barrel, and an adsorption barrel is fixedly connected to the top end of the supporting column. And a filter screen is movably connected to the interior of the storage barrel. By arranging the heating cylinder, the heating device and the filter screen, after tetrahydrofuran is dehydrated, a molecular sieve can be separated from tetrahydrofuran, and the molecular sieve is regenerated, so that the practicability of the adsorbent regeneration device for the tetrahydrofuran dehydration adsorption tower is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of adsorbent regeneration, in particular to a regeneration device for a tetrahydrofuran dehydration adsorbent. Background Technique

[0002] Tetrahydrofuran (THF) has the characteristics of low boiling point, good fluidity, and outstanding solubility. It is an important organic synthesis raw material and an excellent solvent, and is widely used as a production raw material for tetramethylene glycol and a solvent in industries such as coatings, pharmaceuticals, and resins. The downstream production of THF has requirements for water content, and dehydration is required in the recycling process after THF is produced or used as a solvent. However, THF and water form an azeotrope, and ordinary distillation and other technologies can only perform preliminary dehydration on it, which cannot meet the requirements of downstream production and further dehydration treatment is needed. Since molecular sieve adsorbents such as 3A and 4A have the advantages of being porous, having a large specific surface area, and strong hydrophilicity, the molecular sieve can effectively adsorb the water in THF, so as to achieve the purpose of further dehydration.

[0003] The molecular sieve needs to be desorbed and regenerated before it can be reused. The regeneration of the molecular sieve can be achieved by heating, that is, the "thermal regeneration method". For the used molecular sieve after adsorption, in industrial production, high-temperature nitrogen or air can be blown in for regeneration, and a multi-tower alternating use method (while one adsorption tower is adsorbing, other towers are regenerating the molecular sieve) is adopted to ensure the continuous production. However, for the demand of regenerating the molecular sieve adsorbent after small-batch intermittent dehydration of THF, the multi-tower alternating use method has problems such as high control requirements, large equipment investment, many public facilities, large occupied area, and difficulty in frequent switching. Content of the Utility Model

[0004] The purpose of the utility model is to provide a regeneration device for a tetrahydrofuran dehydration adsorbent to solve the demand for regenerating the molecular sieve adsorbent after small-batch intermittent dehydration of tetrahydrofuran.

[0005] To achieve the above purpose, a regeneration device for a tetrahydrofuran dehydration adsorbent is provided, including a base. The bottom of the base is fixedly connected with support feet, and the top of the base is fixedly connected with a storage barrel. One side of the storage barrel is fixedly connected with a discharge port, and a first valve is arranged at the top of the discharge port. The dehydrated tetrahydrofuran solution can be taken out through the first valve and the discharge port;

[0006] A lower flange is fixedly connected to the top of the storage cylinder. An upper flange is movably connected to the top of the lower flange. A heating cylinder is fixedly connected to the top of the upper flange. A heating device is arranged on the inner wall of the heating cylinder. A controller is arranged on the outer wall of the heating cylinder. A support column is fixedly connected to the top of the heating cylinder. The top end of the support column is fixedly connected to an adsorption cylinder. A feed pipe is fixedly connected to the bottom of the adsorption cylinder. A second valve is arranged on one side of the feed pipe. A feed inlet is arranged on the top of the adsorption cylinder. A filter screen is movably connected inside the storage cylinder. By providing the heating cylinder, the heating device, and the filter screen, after the dehydration of tetrahydrofuran is completed, the molecular sieve can be separated from the tetrahydrofuran, and the molecular sieve can be regenerated. By providing the upper flange, the lower flange, the fixing bolts, and the fixing nuts, after the regeneration process of the molecular sieve is completed, the device can be opened and the molecular sieve in the filter screen can be taken out, enhancing the practicability of the adsorbent regeneration device for tetrahydrofuran dehydration adsorption tower.

[0007] According to the described adsorbent regeneration device for tetrahydrofuran dehydration, the shape and size of the filter screen match those of the storage cylinder, and the filter screen is movably connected to the storage cylinder. The tetrahydrofuran and the molecular sieve can be separated through the filter screen, and the molecular sieve can be left in the filter screen for subsequent regeneration treatment of the molecular sieve.

[0008] According to the described adsorbent regeneration device for tetrahydrofuran dehydration, clamping blocks are fixedly connected to both sides of the filter screen, and clamping grooves are formed on the inner wall of the top of the storage cylinder, which facilitates the connection between the filter screen and the storage cylinder and also facilitates the installation and disassembly of the filter screen.

[0009] According to the described adsorbent regeneration device for tetrahydrofuran dehydration, the shape and size of the clamping block match those of the clamping groove, and the filter screen is movably connected to the storage cylinder through the clamping groove and the clamping block, strengthening the stability of the connection between the filter screen and the storage cylinder and facilitating the installation of the filter screen.

[0010] According to the described adsorbent regeneration device for tetrahydrofuran dehydration, the first valve penetrates through the top of the discharge port and extends into the interior of the discharge port, and the first valve is movably connected to the discharge port. By opening the first valve, the dehydrated tetrahydrofuran inside the storage cylinder can be taken out.

[0011] According to the described adsorbent regeneration device for tetrahydrofuran dehydration, the second valve penetrates through one side of the feed pipe and extends into the interior of the feed pipe, and the second valve is movably connected to the feed pipe. By opening the second valve, the mixture of tetrahydrofuran and the molecular sieve can be discharged into the filter screen through the feed pipe.

[0012] According to the described tetrahydrofuran dehydration adsorbent regeneration device, installation holes are provided inside both the upper flange and the lower flange, and fixing bolts are arranged inside the installation holes. The other ends of the fixing bolts are movably connected with fixing nuts, which is convenient for disassembly. By disconnecting the connection between the fixing bolts and the fixing nuts, the connection between the heating cylinder and the storage cylinder can be disconnected, so that the filter screen and the molecular sieve that has completed the regeneration treatment in the filter screen can be taken out.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The tetrahydrofuran dehydration adsorbent regeneration device of the present utility model can separate the molecular sieve from tetrahydrofuran and regenerate the molecular sieve after the tetrahydrofuran dehydration is completed through the provided heating cylinder, heating device, and filter screen, enhancing the practicability of the tetrahydrofuran dehydration adsorbent regeneration device.

[0015] 2. The tetrahydrofuran dehydration adsorbent regeneration device of the present utility model can open the device and take out the molecular sieve in the filter screen after the regeneration process of the molecular sieve is completed through the provided upper flange, lower flange, fixing bolts, and fixing nuts, enhancing the practicability of the tetrahydrofuran dehydration adsorbent regeneration device.

[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0018] Figure 1 is a three-dimensional structural schematic diagram of a tetrahydrofuran dehydration adsorbent regeneration device of the present utility model;

[0019] Figure 2 is a cross-sectional view of a tetrahydrofuran dehydration adsorbent regeneration device of the present utility model;

[0020] Figure 3 is a three-dimensional structural schematic diagram of a storage cylinder of a tetrahydrofuran dehydration adsorbent regeneration device of the present utility model;

[0021] Figure 4 is a three-dimensional structural schematic diagram of a filter screen of a tetrahydrofuran dehydration adsorbent regeneration device of the present utility model.

[0022] In the figure: 1, base; 2, support leg; 3, storage cylinder; 4, discharge port; 5, first valve; 6, lower flange; 7, upper flange; 8, fixing bolt; 9, fixing nut; 10, mounting hole; 11, heating cylinder; 12, controller; 13, heating device; 14, support pillar; 15, conveying pipe; 16, second valve; 17, adsorption cylinder; 18, feed port; 19, clamping groove; 20, filter screen; 21, clamping block. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-4 , the embodiments of the present invention provide a technical solution: a tetrahydrofuran dehydration adsorbent regeneration device, including a base 1, the bottom of the base 1 is fixedly connected with support legs 2, the top of the base 1 is fixedly connected with a storage cylinder 3, one side of the storage cylinder 3 is fixedly connected with a discharge port 4, and a first valve 5 is arranged at the top of the discharge port 4. The dehydrated tetrahydrofuran solution can be taken out through the first valve 5 and the discharge port 4;

[0025] The top of the storage cylinder 3 is fixedly connected with a lower flange 6, the top of the lower flange 6 is movably connected with an upper flange 7, the top of the upper flange 7 is fixedly connected with a heating cylinder 11, a heating device 13 is arranged on the inner wall of the heating cylinder 11, a controller 12 is arranged on the outer wall of the heating cylinder 11, the top of the heating cylinder 11 is fixedly connected with a support pillar 14, the top end of the support pillar 14 is fixedly connected with an adsorption cylinder 17, the bottom of the adsorption cylinder 17 is fixedly connected with a conveying pipe 15, a second valve 16 is arranged on one side of the conveying pipe 15, a feed port 18 is arranged at the top of the adsorption cylinder 17, and a filter screen 20 is movably connected inside the storage cylinder 3. By arranging the heating cylinder 11, the heating device 13, and the filter screen 20, after the tetrahydrofuran dehydration is completed, the molecular sieve can be separated from the tetrahydrofuran, and the molecular sieve can be regenerated. By arranging the upper flange 7, the lower flange 6, the fixing bolts 8, and the fixing nuts 9, after the molecular sieve regeneration process is completed, the device can be opened and the molecular sieve in the filter screen 20 can be taken out, enhancing the practicability of the tetrahydrofuran dehydration adsorption tower adsorbent regeneration device.

[0026] The shape and size of the filter screen 20 match those of the storage cylinder 3, and the filter screen 20 is movably connected to the storage cylinder 3. The tetrahydrofuran and molecular sieve can be separated through the filter screen 20, and the molecular sieve is left in the filter screen 20, facilitating subsequent regeneration treatment of the molecular sieve. Clamping blocks 21 are fixedly connected to both sides of the filter screen 20, and clamping grooves 19 are provided on the inner wall of the top of the storage cylinder 3, facilitating the connection between the filter screen 20 and the storage cylinder 3, and also facilitating the installation and disassembly of the filter screen 20. The shape and size of the clamping blocks 21 match those of the clamping grooves 19, and the filter screen 20 is movably connected to the storage cylinder 3 through the clamping grooves 19 and the clamping blocks 21, strengthening the connection stability between the filter screen 20 and the storage cylinder 3 and facilitating the installation of the filter screen 20. The first valve 5 penetrates through the top of the discharge port 4 and extends into the interior of the discharge port 4, and the first valve 5 is movably connected to the discharge port 4. The dehydrated tetrahydrofuran inside the storage cylinder 3 can be taken out by opening the first valve 5. The second valve 16 penetrates through one side of the conveying pipe 15 and extends into the interior of the conveying pipe 15, and the second valve 16 is movably connected to the conveying pipe 15. The mixture of tetrahydrofuran and molecular sieve can be discharged into the filter screen 20 through the conveying pipe 15 by opening the second valve 16. Installation holes 10 are provided inside both the upper flange 7 and the lower flange 6, and fixing bolts 8 are provided inside the installation holes 10. The other ends of the fixing bolts 8 are movably connected with fixing nuts 9, facilitating disassembly. The connection between the heating cylinder 11 and the storage cylinder 3 can be disconnected by disconnecting the connection between the fixing bolts 8 and the fixing nuts 9, so that the filter screen 20 and the molecular sieve that has completed the regeneration treatment in the filter screen 20 can be taken out.

[0027] Working principle: Pour the tetrahydrofuran and molecular sieve into the adsorption cylinder 17 through the feed port 18, and let it stand for a period of time. After the dehydration of the tetrahydrofuran is completed, open the second valve 16. The mixture of molecular sieve and tetrahydrofuran enters the heating cylinder 11 through the conveying pipe 15. Start the heating device 13 through the controller 12. The mixture of tetrahydrofuran and molecular sieve passes through the filter screen 20 at the top of the storage cylinder 3, and the tetrahydrofuran will pass through the filter screen 20 and enter the storage cylinder 3. The dehydrated tetrahydrofuran can be taken out through the first valve 5 and the discharge port 4. At the same time, the molecular sieve will remain in the filter screen 20. Under the heating of the heating device 13, the molecular sieve undergoes regeneration treatment. After the regeneration is completed, the connection between the fixing bolts 8 and the fixing nuts 9 on the upper flange 7 and the lower flange 6 can be disconnected, so as to take out the filter screen 20, and thus the molecular sieve can be taken out.

[0028] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A tetrahydrofuran dehydration adsorbent regeneration device, comprising a base (1), characterized in that: The bottom of the base (1) is fixedly connected to a support foot (2), the top of the base (1) is fixedly connected to a material storage barrel (3), one side of the material storage barrel (3) is fixedly connected to a material discharge port (4), and a first valve (5) is provided on the top of the material discharge port (4); The top of the material storage barrel (3) is fixedly connected to a lower flange (6), the top of the lower flange (6) is movably connected to an upper flange (7), the top of the upper flange (7) is fixedly connected to a heating barrel (11), the inner wall of the heating barrel (11) is provided with a heating device (13), the outer wall of the heating barrel (11) is provided with a controller (12), the top of the heating barrel (11) is fixedly connected to a support (14), the top of the support (14) is fixedly connected to an adsorption barrel (17), the bottom of the adsorption barrel (17) is fixedly connected to a material delivery pipe (15), one side of the material delivery pipe (15) is provided with a second valve (16), the top of the adsorption barrel (17) is provided with a material feed port (18), and the interior of the material storage barrel (3) is movably connected to a filter screen (20).

2. A tetrahydrofuran dehydration adsorbent regeneration device as claimed in claim 1, characterized in that: The shape and size of the filter screen (20) match those of the storage barrel (3), and the filter screen (20) is movably connected to the storage barrel (3).

3. A tetrahydrofuran dehydration adsorbent regeneration device as claimed in claim 1, characterized in that: Blocks (21) are fixedly connected to both sides of the filter screen (20), and a clamping groove (19) is provided on the top inner wall of the storage barrel (3).

4. A tetrahydrofuran dehydration adsorbent regeneration device as claimed in claim 3, characterized in that: The shape and size of the clamping block (21) match those of the clamping slot (19), and the filter screen (20) is movably connected to the material storage barrel (3) via the clamping slot (19) and the clamping block (21).

5. A tetrahydrofuran dehydration adsorbent regeneration device as claimed in claim 1, characterized in that: The first valve (5) passes through the top of the discharge port (4) and extends to the inside of the discharge port (4), and the first valve (5) is movably connected to the discharge port (4).

6. A tetrahydrofuran dehydration adsorbent regeneration device as claimed in claim 1, characterized in that: The second valve (16) passes through one side of the material conveying pipe (15) and extends into the interior of the material conveying pipe (15), and the second valve (16) is movably connected to the material conveying pipe (15).

7. A tetrahydrofuran dehydration adsorbent regeneration device as claimed in claim 1, characterized in that: The upper flange (7) and the lower flange (6) are each provided with a mounting hole (10), and a fixing bolt (8) is provided inside the mounting hole (10), and the other end of the fixing bolt (8) is movably connected to a fixing nut (9).

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