Extraction device for detecting sulfolane

Abstract

The extraction device comprises an annular seat, an extraction pipe and a sampling bottle, a threaded groove used for being connected with a sampling opening of a sulfolane finished product storage tank is formed in the inner ring face of the lower end of the annular seat, the extraction pipe is inserted in the center of the annular seat, the top end of the extraction pipe is connected with a U-shaped pipe, and the sampling bottle is connected with the U-shaped pipe. The utility model relates to the technical field of sulfolane detection, a combined design is adopted, a sulfolane solution is extracted into the sampling bottle under the action of negative pressure, after one-time sampling is completed, the stop valve is closed, and the negative pressure extraction assembly is controlled to reset, so that the sulfolane solution is extracted into the sampling bottle, and the sulfolane solution is extracted into the sampling bottle. The sampling bottle is simple in structure and convenient to operate, a sulfolane sample can be extracted into the sampling bottle at a time, the sample is effectively prevented from being contaminated by external pollutants in the transferring process, and the reliability of a detection result is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfolane detection, in particular to an extraction device for sulfolane detection. Background Art

[0002] Sulfolane is an excellent non-protonic polar solvent, which is miscible with water, acetone, toluene, etc. It is also an ideal solvent in the process of aromatic extraction in petrochemical industry. It uses butadiene and sulfur dioxide as raw materials, and in the presence of methanol solvent of hydroquinone, it is heated in a pressure-resistant reactor (100-110°C) to synthesize sulfolane methanol solution. After fractionation, the crude sulfolane is hydrogenated in the presence of a nickel-containing catalyst to be converted into sulfolane, and then separated by gas-liquid separation and fractionated to obtain the finished product. The detection methods of sulfolane mainly include gas chromatography, liquid chromatography, fluorescence method and capillary electrophoresis. In the process of sulfolane detection, an extraction device is first needed to use. The sulfolane in the finished product storage tank is sampled by the extraction device and then sent for inspection. However, the structure of traditional sampling devices is relatively simple. Most of them need to extend the extraction device into the tank body, extract the sample and then transfer it to a test tube or reagent bottle for storage. During the transfer of the extraction device, the sample is easily contaminated with external pollutants, which affects the reliability of the test results. In view of this, in-depth research was conducted on the above-mentioned problems, and this case came into being. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides an extraction device for detecting sulfolane, which solves the problems raised in the background technology.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: an extraction device for sulfolane detection, comprising an annular seat, an extraction tube and a sampling bottle, wherein the inner ring surface at the lower end of the annular seat is provided with a threaded groove for connecting with a sampling port of a sulfolane finished product storage tank, the extraction tube is inserted in the center of the annular seat, the top of the extraction tube is connected with a U-shaped tube, the top of the sampling bottle is screwed with a sealing cover, the sealing cover is provided with a liquid inlet pipe and an exhaust pipe, the liquid inlet pipe is plugged and sealed with the open end of the U-shaped tube, and one end of the exhaust pipe is connected with a negative pressure sampling assembly;

[0005] The liquid inlet pipe is provided with a stop valve, the exhaust pipe is provided with a one-way valve, and the conducting direction of the one-way valve points to one side of the negative pressure sampling component;

[0006] The negative pressure sampling component includes a bracket, a drive control component and a negative pressure extraction component. The bracket is arranged on the side wall of the sulfolane finished product storage tank, the drive control component is arranged on the bracket, the negative pressure extraction component is arranged on the bracket and one end of the negative pressure extraction component is connected to the exhaust pipe through a flexible connecting pipe, and the moving end of the negative pressure extraction component is connected to the drive control component.

[0007] The above-mentioned drive control component includes a fixed groove, a transmission screw, a movable member and a servo motor. The fixed groove is arranged on the bracket, the transmission screw is rotatably arranged in the fixed groove, and guide members are symmetrically arranged on both sides of the transmission screw. The movable member is threadedly matched with the transmission screw and is respectively connected to the guide members on both sides. The servo motor is arranged on one side of the fixed groove and the output end is connected to the transmission screw.

[0008] The moving component comprises a moving seat and a lead screw nut, wherein the lead screw nut is embedded in the moving seat and rotationally cooperates with the transmission lead screw.

[0009] The guide component comprises a guide rod and a sliding block, wherein the guide rod is symmetrically arranged in the fixing groove, and the sliding block is slidably sleeved on the guide rod and fixedly connected with the moving seat.

[0010] The negative pressure extraction component comprises a silo, a rubber piston and a pull rod. The silo is arranged on the side wall of the bracket, and the rubber piston is fixed on one end of the pull rod and cooperates with the inner wall of the silo in a sliding and sealing manner.

[0011] The open ends of the liquid inlet pipe and the exhaust pipe are both provided with rubber sealing sleeves.

[0012] The utility model provides an extraction device for sulfolane detection. It has the following beneficial effects: the extraction device for sulfolane detection adopts a modular design, and the sampling bottle and the extraction tube are directly assembled and connected. When sampling, the extraction tube is inserted into the sampling port, and is sealed and connected with the sampling port of the sulfolane finished product storage tank through the annular seat, and the driving control part is controlled to move, thereby driving the moving end of the negative pressure extraction part to move, so as to extract the air in the sampling bottle and the extraction tube, and then under the action of negative pressure, the sulfolane solution is extracted into the sampling bottle. After one sampling is completed, the stop valve is closed, and the negative pressure extraction part is controlled to reset. A new sampling bottle can be replaced to quickly perform secondary sampling. It has a simple structure and is easy to operate. The sulfolane sample can be extracted into the sampling bottle at one time, which effectively avoids contamination of external pollutants during sample transfer and enhances the reliability of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of an extraction device for detecting sulfolane described in the utility model.

[0014] Figure 2 It is a partial enlarged structural schematic diagram of the sampling bottle of the utility model.

[0015] Figure 3 It is a side structural schematic diagram of the drive control component of the utility model.

[0016] In the figure: 1. annular seat; 2. extraction tube; 3. sampling bottle; 4. finished product storage tank; 5. U-shaped tube; 6. sealing cover; 7. liquid inlet pipe; 8. exhaust pipe; 9. stop valve; 10. one-way valve; 11. bracket; 12. flexible connecting pipe; 13. fixing groove; 14. transmission screw; 15. servo motor; 16. moving seat; 17. screw nut; 18. guide rod; 19. slider; 20. silo; 21. rubber piston; 22. pull rod; 23. rubber sealing sleeve. DETAILED DESCRIPTION

[0017] 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.

[0018] Embodiment: In conjunction with the specification Figure 1-3It can be seen that in order to solve the problem in the prior art that when the sample extraction device for sulfolane detection is transferred, the sample is easily contaminated with external pollutants, which affects the reliability of the detection result, a specific extraction device for sulfolane detection is designed, including an annular seat 1, an extraction tube 2 and a sampling bottle 3. The inner ring surface of the lower end of the annular seat 1 is provided with a threaded groove for connecting with the sampling port of the sulfolane finished product storage tank 4. The extraction tube 2 is inserted in the center position of the annular seat 1, and the top of the extraction tube 2 is connected with a U-shaped tube 5. The top of the sampling bottle 3 is screwed with a sealing cover 6. The sealing cover 6 is provided with a liquid inlet pipe 7 and an exhaust pipe 8. The open ends of the liquid inlet pipe 7 and the exhaust pipe 8 are both provided with rubber sealing sleeves 23. The liquid inlet pipe 7 is plugged and sealed with the open end of the U-shaped tube 5, and one end of the exhaust pipe 8 is connected to a negative pressure sampling assembly; wherein a stop valve 9 is provided on the liquid inlet pipe 7, and a one-way valve 10 is provided on the exhaust pipe 8, and the conduction direction of the one-way valve 10 points to one side of the negative pressure sampling assembly; the above-mentioned negative pressure sampling assembly includes a bracket 11, a drive control component and a negative pressure extraction component, and the bracket 1 1 is arranged on the side wall of the sulfolane finished product storage tank 4, the driving control component is arranged on the bracket 11, the negative pressure extraction component is arranged on the bracket 11 and one end is connected with the exhaust pipe 8 through the flexible connecting pipe 12, the moving end of the negative pressure extraction component is connected with the driving control component, and the combined design is adopted to directly assemble and connect the sampling bottle 3 and the extraction tube 2. When sampling, the extraction tube 2 is inserted into the sampling port and sealed with the sampling port of the sulfolane finished product storage tank 4 through the annular seat 1, the driving control component is controlled to move and then the moving end of the negative pressure extraction component is driven to move, so that the air in the sampling bottle 3 and the extraction tube 2 is extracted, and then the sulfolane solution is extracted into the sampling bottle 3 under the action of negative pressure. After one sampling is completed, the stop valve 9 is closed, and the negative pressure extraction component is controlled to reset, and the new sampling bottle 3 is replaced to quickly carry out the secondary sampling work. The structure is simple and the operation is convenient. The sulfolane sample can be extracted into the sampling bottle 3 at one time, which effectively avoids the contamination of external pollutants during the sample transfer process and enhances the reliability of the detection result.

[0019] In the specific implementation process, the above-mentioned drive control component includes a fixed groove 13, a transmission screw 14, a moving component and a servo motor 15. The fixed groove 13 is arranged on the bracket 11, and the transmission screw 14 is rotatably arranged in the fixed groove 13. Guide components are symmetrically arranged on both sides of the transmission screw 14. The moving component is threadedly matched with the transmission screw 14 and the two sides are respectively connected to the guide components. The servo motor 15 is arranged on one side of the fixed groove 13 and the output end is connected to the transmission screw 14. The moving component includes a moving seat 16 and a screw nut 17. The screw nut 17 is embedded in the moving seat 16 and rotatably matched with the transmission screw 14; the above-mentioned guide component includes a guide rod 18 and a slider 19. The guide rod 18 is symmetrically arranged in the fixed groove 13, and the slider 19 is slidably mounted on the guide rod 18 and fixedly connected to the moving seat 16. The negative pressure extraction component includes a silo 20, The rubber piston 21 and the pull rod 22, the silo 20 are arranged on the side wall of the bracket 11, the rubber piston 21 is fixed on one end of the pull rod 22 and cooperates with the inner wall of the silo 20 in a sliding and sealing manner. When in use, after the sampling bottle 3 is connected to the U-shaped tube 5 and the flexible connecting tube 12 and other components, the stop valve 9 on the liquid inlet pipe 7 is opened, the servo motor 15 is started, and the driving end of the servo motor 15 is controlled to rotate to drive the transmission screw 14 to rotate. The moving seat 16 slides along the guide rod 18 under the driving action of the screw nut 17, and then pulls the pull rod 22 to move. During the movement of the pull rod 22 and the rubber piston 21, the air pressure on the upper part of the silo 20 decreases, thereby extracting the gas in the sampling bottle 3 through the exhaust pipe 8. After the negative pressure is generated in the sampling bottle 3, the sulfolane product in the sulfolane finished product storage tank 4 is sucked into the sampling bottle 3 through the extraction tube 2 and the liquid inlet tube 7, and the extraction and sampling operation is completed.

[0020] Although 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. An extraction device for sulfolane detection, characterized in that: It includes an annular seat, an extraction tube and a sampling bottle. The inner ring surface at the lower end of the annular seat is provided with a threaded groove for connecting with the sampling port of the sulfolane finished product storage tank. The extraction tube is inserted in the center of the annular seat. The top of the extraction tube is connected with a U-shaped tube. The top of the sampling bottle is screwed with a sealing cover. The sealing cover is provided with a liquid inlet pipe and an exhaust pipe. The liquid inlet pipe is plugged and sealed with the open end of the U-shaped tube. One end of the exhaust pipe is connected with a negative pressure sampling assembly. The liquid inlet pipe is provided with a stop valve, the exhaust pipe is provided with a one-way valve, and the conducting direction of the one-way valve points to one side of the negative pressure sampling component; The negative pressure sampling component includes a bracket, a drive control component and a negative pressure extraction component. The bracket is arranged on the side wall of the sulfolane finished product storage tank, the drive control component is arranged on the bracket, the negative pressure extraction component is arranged on the bracket and one end of the negative pressure extraction component is connected to the exhaust pipe through a flexible connecting pipe, and the moving end of the negative pressure extraction component is connected to the drive control component.

2. The extraction device for sulfolane detection according to claim 1, characterized in that: The drive control component includes a fixed groove, a transmission screw, a movable member and a servo motor. The fixed groove is arranged on a bracket, and the transmission screw is rotatably arranged in the fixed groove. Guide members are symmetrically arranged on both sides of the transmission screw. The movable member is threadedly matched with the transmission screw and is respectively connected to the guide members on both sides. The servo motor is arranged on one side of the fixed groove and the output end is connected to the transmission screw.

3. The extraction device for detecting sulfolane according to claim 2, characterized in that: The moving component comprises a moving seat and a lead screw nut. The lead screw nut is embedded in the moving seat and rotatably cooperates with the transmission lead screw.

4. The extraction device for detecting sulfolane according to claim 3, characterized in that: The guide component comprises a guide rod and a sliding block. The guide rod is symmetrically arranged in the fixing groove. The sliding block is slidably sleeved on the guide rod and fixedly connected with the moving seat.

5. The extraction device for sulfolane detection according to claim 1, characterized in that: The negative pressure extraction component comprises a silo, a rubber piston and a pull rod. The silo is arranged on the side wall of the bracket. The rubber piston is fixed on one end of the pull rod and is slidably sealed with the inner wall of the silo.

6. The extraction device for sulfolane detection according to claim 1, characterized in that: The open ends of the liquid inlet pipe and the exhaust pipe are both provided with rubber sealing sleeves.

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