Purification device for sulfolane solution

Abstract

The utility model discloses a sulfolane solution purification device which comprises an anion exchange resin tower body, the liquid inlet end of the anion exchange resin tower body is connected with a pressurization type micropore filtering structure, the liquid inlet end of the pressurization type micropore filtering structure is connected with a sedimentation filtering bin, the top of the sedimentation filtering bin is connected with a liquid injection pipe, and the liquid injection pipe is connected with a liquid outlet of the anion exchange resin tower body. The utility model relates to the technical field of sulfolane solution purification, which is characterized in that a pre-filtering structure of an anion exchange resin tower body in the existing sulfolane purification device is improved, and large-particle impurities and macromolecular groups in an inferior sulfolane solution are filtered and adsorbed by utilizing a sedimentation filtering bin; the resin tower body is provided with the porous ceramic filter pore plate, and the mechanical pressurizing assembly is matched to pressurize the sulfolane solution, so that the sulfolane solution passes through the porous ceramic filter pore plate, small-particle impurities in the solution are filtered out, the particle impurities entering the resin tower body are effectively reduced, and the resin exchange purification operation efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfolane solution purification, in particular to a sulfolane solution purification device. Background Art

[0002] In the process of aromatic extraction, sulfolane is one of the ideal solvents and is widely used in the field of petrochemicals. Sulfolane has high solubility and selectivity for aromatics, a large density difference with crude oil and a large boiling point difference with gasoline aromatics, small latent heat of evaporation and specific heat, and good thermal stability and chemical stability, so it can obtain a higher aromatic yield, facilitate two-phase separation and solvent recovery, and reduce heat energy and solvent consumption. Sulfolane has strong solubility. During daily operation, sulfolane undergoes solvent degradation, oxidation and other reactions to produce corrosive sulfonic acids and macromolecular polymers, etc., while corroding equipment to cause more impurities, affecting the separation efficiency of the tower plate and the heat exchange efficiency of the heat exchanger, causing equipment corrosion. Most of the existing sulfolane purification devices use anion exchange resins for purification. The solid impurities in the sulfolane solution are easy to block the resin penetration holes. The pre-filtration structure of the existing sulfolane purification device is relatively simple, and it is impossible to filter out small particle impurities in the solution, affecting the efficiency of subsequent resin exchange purification operations. In view of this, in-depth research was conducted on the above-mentioned problems, and this case was created. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a sulfolane solution purification device, which solves the problems raised in the background technology.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a sulfolane solution purification device, comprising an anion exchange resin tower body, the liquid inlet end of the anion exchange resin tower body is connected to a pressurized microporous filtration structure, the liquid inlet end of the pressurized microporous filtration structure is connected to a sedimentation filtration bin, and the top of the sedimentation filtration bin is connected to a liquid injection pipe;

[0005] The pressurized microporous filtration structure includes a filter silo, a porous ceramic filter plate, a liquid inlet pipe, a liquid outlet pipe, a mechanical supercharger assembly and a backwash assembly; the porous ceramic filter plate is arranged in the filter silo, one end of the liquid inlet pipe is connected to the side wall of the filter silo, and the other end is connected to the bottom of the sedimentation filter silo, a one-way valve is arranged on the liquid inlet pipe, and the conduction direction of the one-way valve points to one side of the filter silo, the liquid outlet pipe is arranged at the top of the filter silo and is connected to the liquid inlet end of the anion exchange resin tower body, the mechanical supercharger assembly is arranged at the lower part of the filter silo and one end extends into the filter silo, the backwash assembly is connected to the liquid outlet pipe through a three-way control valve, and a stop valve is arranged above the three-way control valve.

[0006] A quartz sand packing layer is arranged in the above-mentioned sedimentation and filtration bin, an activated carbon packing layer is arranged on the top of the quartz sand packing layer, and a ceramic orifice plate is arranged on the top of the activated carbon packing layer.

[0007] The above-mentioned mechanical supercharger assembly includes a bracket, a hydraulic cylinder, a pull rod and a rubber piston. The bracket is arranged at the lower part of the filter silo, and the hydraulic cylinder is arranged on the bracket. One end of the pull rod is connected to the telescopic end of the hydraulic cylinder, and the other end extends into the filter silo. The rubber piston is fixedly sleeved on the pull rod and slidably sealed with the inner wall of the filter silo.

[0008] The upper end surface of the rubber piston is an arc-shaped concave surface, the pull rod is a hollow rod, and a drain valve is arranged on the side wall of the pull rod.

[0009] The backwash assembly comprises a water tank, a booster pump and a connecting pipe. The booster pump is arranged on the water tank. One end of the connecting pipe is connected to the water outlet of the booster pump, and the other end is connected to the three-way control valve.

[0010] An exhaust valve is arranged on the top of the filter silo.

[0011] The utility model provides a sulfolane solution purification device. It has the following beneficial effects: the sulfolane solution purification device improves the pre-filter structure of the anion exchange resin tower body in the existing sulfolane purification device, adds a supercharged microporous filtration structure and a sedimentation filtration bin, the inferior sulfolane solution first enters the sedimentation filtration bin, and the sedimentation filtration bin is used to filter and adsorb large particle impurities and large molecular clusters in the inferior sulfolane solution, and the sulfolane solution after preliminary filtration further enters the supercharged microporous filtration structure, and the mechanical supercharger component is used to pressurize the sulfolane solution, so that the sulfolane solution passes through the porous ceramic filter plate, and the small particle impurities in the solution are filtered out, thereby effectively reducing the granular impurities entering the resin tower body, ensuring the efficiency of the resin exchange purification operation, and at the same time, the backwashing component can be used to realize the flushing operation of the filter silo and the porous ceramic filter plate, ensuring the overall stability of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main structure of a sulfolane solution purification device described in the utility model.

[0013] Figure 2 For this utility model Figure 1 Schematic diagram of the local enlarged structure at position a.

[0014] Figure 3 For this utility model Figure 1 Schematic diagram of the local enlarged structure at position b.

[0015] In the figure: 1. Resin tower body; 2. Sedimentation filter bin; 3. Liquid injection pipe; 4. Filter silo; 5. Porous ceramic filter plate; 6. Liquid inlet pipe; 7. Liquid outlet pipe; 8. Three-way control valve; 9. Stop valve; 10. Quartz sand packing layer; 11. Activated carbon packing layer; 12. Ceramic orifice plate; 13. Bracket; 14. Hydraulic cylinder; 15. Pull rod; 16. Rubber piston; 17. Drain valve; 18. Water tank; 19. Booster pump; 20. Connecting pipe; 21. Exhaust valve. DETAILED DESCRIPTION

[0016] 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.

[0017] Embodiment: In conjunction with the specification Figure 1-3As shown, in order to solve the problem that the pre-filter structure of the sulfolane purification device in the prior art is relatively simple and cannot filter out small particle impurities in the solution, affecting the efficiency of the subsequent resin exchange purification operation, a sulfolane solution purification device is specifically designed, including an anion exchange resin tower body 1, a pressurized microporous filtration structure is connected to the liquid inlet end of the anion exchange resin tower body 1, a sedimentation filter tank 2 is connected to the liquid inlet end of the pressurized microporous filtration structure, and a liquid injection pipe 3 is connected to the top of the sedimentation filter tank 2; wherein the pressurized microporous The filtration structure includes a filtration silo 4, a porous ceramic filter plate 5, a liquid inlet pipe 6, a liquid outlet pipe 7, a mechanical supercharger assembly and a backwash assembly; the porous ceramic filter plate 5 is arranged in the filtration silo 4, an exhaust valve 21 is arranged on the top of the filtration silo 4, one end of the liquid inlet pipe 6 is connected to the side wall of the filtration silo 4, and the other end is connected to the bottom of the sedimentation filter bin 2, a one-way valve is arranged on the liquid inlet pipe 6, and the conduction direction of the one-way valve points to one side of the filtration silo 4, and the liquid outlet pipe 7 is arranged on the top of the filtration silo 4 and connected to the liquid inlet end of the anion exchange resin tower body 1. The mechanical booster assembly is arranged at the lower part of the filter silo 4 and one end thereof extends into the filter silo 4. The backwash assembly is connected to the liquid outlet pipe 7 through a three-way control valve 8. A stop valve 9 is arranged above the three-way control valve 8. The pre-filter structure of the anion exchange resin tower body 1 in the existing sulfolane purification device is improved, and a booster microporous filtration structure and a sedimentation filter bin 2 are added. The inferior sulfolane solution first enters the sedimentation filter bin 2, and the large particle impurities and large molecular clusters in the inferior sulfolane solution are separated by the sedimentation filter bin 2. After filtering and adsorption, the sulfolane solution after preliminary filtration further enters the pressurized microporous filtration structure, and the sulfolane solution is pressurized by a mechanical supercharging component, so that the sulfolane solution passes through the porous ceramic filter plate 5, and the small particle impurities in the solution are filtered out, thereby effectively reducing the granular impurities entering the resin tower body 1, ensuring the efficiency of the resin exchange purification operation, and at the same time, the backwashing component can be used to realize the flushing operation of the filter silo 4 and the porous ceramic filter plate 5, ensuring the overall stability of the device operation.

[0018] In the specific implementation process, a quartz sand packing layer 10 is provided in the above-mentioned sedimentation filtration bin 2, an activated carbon packing layer 11 is provided on the top of the quartz sand packing layer 10, and a ceramic orifice plate 12 is provided on the top of the activated carbon packing layer 11. Gravity is used to guide the inferior sulfolane solution, so that the inferior sulfolane solution passes through the ceramic orifice plate 12, the activated carbon packing layer 11 and the quartz sand packing layer 10 from top to bottom in sequence, and then the large particle impurities and large molecular clusters in the inferior sulfolane solution are filtered and adsorbed, thereby achieving preliminary filtration of the inferior sulfolane solution.

[0019] In the specific implementation process, the above-mentioned mechanical supercharger assembly includes a bracket 13, a hydraulic cylinder 14, a tie rod 15 and a rubber piston 16. The bracket 13 is arranged at the lower part of the filter silo 4, and the hydraulic cylinder 14 is arranged on the bracket 13. One end of the tie rod 15 is connected to the telescopic end of the hydraulic cylinder 14, and the other end extends into the filter silo 4. The rubber piston 16 is fixedly sleeved on the tie rod 15 and is slidably sealed with the inner wall of the filter silo 4. The upper end surface of the rubber piston 16 is an arc-shaped concave surface, the tie rod 15 is a hollow rod, and the side wall of the tie rod 15 is provided with a drain valve 17. When in use, the sulfolane solution after preliminary filtration is further injected into In the filter silo 4, the stop valve 9 is opened to control the expansion of the telescopic end of the hydraulic cylinder 14, thereby pushing the pull rod 15 and the rubber piston 16 to move upward. During the upward process, the sulfolane solution is squeezed and then passes through the porous ceramic filter plate 5, thereby intercepting and filtering out small particle impurities in the sulfolane solution, further improving the cleanliness of the sulfolane solution. In this process, some of the granular impurities remaining in the sulfolane solution are gathered in the arc-shaped concave surface at the top of the rubber piston 16 under the action of gravity, which can effectively reduce the clogging of the porous ceramic filter plate 5 by the granular impurities, and improve the operating stability and filtration efficiency of the device.

[0020] In the specific implementation process, the above-mentioned backwashing component includes a water tank 18, a booster pump 19 and a connecting pipe 20. The booster pump 19 is arranged on the water tank 18. One end of the connecting pipe 20 is connected to the water outlet end of the booster pump 19, and the other end is connected to the three-way control valve 8. When in use, close the stop valve 9, adjust the conduction direction of the three-way control valve 8, start the booster pump 19, and use the booster pump 19 to inject the cleaning in the water tank 18 through the top of the filter silo 4, and then reversely flush the porous ceramic filter plate 5. During the flushing process, open the drain valve 17 on the side of the pull rod 15 to discharge the sewage.

[0021] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sulfolane solution purification device, comprising an anion exchange resin tower body, characterized in that: The liquid inlet end of the anion exchange resin tower body is connected to a pressurized microporous filtration structure, the liquid inlet end of the pressurized microporous filtration structure is connected to a sedimentation filtration bin, and the top of the sedimentation filtration bin is connected to a liquid injection pipe; The pressurized microporous filtration structure includes a filter silo, a porous ceramic filter plate, a liquid inlet pipe, a liquid outlet pipe, a mechanical supercharger assembly and a backwash assembly; the porous ceramic filter plate is arranged in the filter silo, one end of the liquid inlet pipe is connected to the side wall of the filter silo, and the other end is connected to the bottom of the sedimentation filter silo, a one-way valve is arranged on the liquid inlet pipe, and the conduction direction of the one-way valve points to one side of the filter silo, the liquid outlet pipe is arranged at the top of the filter silo and is connected to the liquid inlet end of the anion exchange resin tower body, the mechanical supercharger assembly is arranged at the lower part of the filter silo and one end extends into the filter silo, the backwash assembly is connected to the liquid outlet pipe through a three-way control valve, and a stop valve is arranged above the three-way control valve.

2. A sulfolane solution purification device according to claim 1, characterized in that: A quartz sand filling layer is arranged in the sedimentation and filtering bin, an activated carbon filling layer is arranged on the upper part of the quartz sand filling layer, and a ceramic orifice plate is arranged on the upper part of the activated carbon filling layer.

3. A purification device for sulfolane solution according to claim 1, characterized in that: The mechanical supercharger assembly includes a bracket, a hydraulic cylinder, a pull rod and a rubber piston. The bracket is arranged at the lower part of the filter silo, the hydraulic cylinder is arranged on the bracket, one end of the pull rod is connected to the telescopic end of the hydraulic cylinder, and the other end extends into the filter silo, and the rubber piston is fixedly sleeved on the pull rod and slidingly sealed with the inner wall of the filter silo.

4. A sulfolane solution purification device according to claim 3, characterized in that: The upper end surface of the rubber piston is an arc-shaped concave surface, the pull rod is a hollow rod, and a drain valve is arranged on the side wall of the pull rod.

5. A sulfolane solution purification device according to claim 1, characterized in that: The backwash component comprises a water tank, a booster pump and a connecting pipe. The booster pump is arranged on the water tank. One end of the connecting pipe is connected to the water outlet end of the booster pump, and the other end is connected to the three-way control valve.

6. A sulfolane solution purification device according to claim 1, characterized in that: An exhaust valve is arranged on the top of the filter silo.

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