Dimethyl sulfone extraction device and extraction method

Abstract

The invention provides a dimethyl sulfone extraction device and method, and relates to the technical field of dimethyl sulfone preparation. The dimethyl sulfone extraction device comprises a mixing box, a first feeding hopper and a second feeding hopper; the blocking mechanism comprises sliding columns arranged on the side walls of the two ends of the fixed box in a sliding mode, a sealing plate arranged at the ends, away from the fixed box, of the sliding columns, and a driving assembly arranged in the fixed box and used for driving the two sliding columns to move in the same direction so as to intermittently block discharging ports of the first feeding hopper and the second feeding hopper. The wall scraping mechanism can scrape off part of crystals attached to the surfaces of the stirring blades while the stirring blades rotate. According to the invention, sulfite and methanol can be intermittently put into the mixing box in sequence, so that the sulfite and the methanol are doped together to improve the reaction speed of a solution, and part of crystals which are separated out and attached to the surfaces of the stirring blades can be scraped off while the stirring blades rotate; the solution can react thoroughly, and resource waste caused by the fact that crystals cannot be collected subsequently can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of dimethyl sulfone preparation, and in particular to a dimethyl sulfone extraction device and an extraction method. Background Art

[0002] Dimethyl sulfone is a white crystalline powder, which is easily soluble in water, ethanol, benzene, methanol and acetone, and slightly soluble in ether. Dimethyl sulfone is used in industry as a high-temperature solvent and raw material for organic synthesis, a gas chromatography stationary liquid, an analytical reagent, a food additive and a drug. As an organic sulfide, dimethyl sulfone has the ability to enhance the body's ability to produce insulin, and also promotes the metabolism of carbohydrates. It is a necessary substance for the synthesis of human collagen. Dimethyl sulfone can promote wound healing, and can also play a role in the synthesis and activation of vitamin B, vitamin C, and biotin required for metabolism and nerve health. It is called "natural beautifying carbon substance". Dimethyl sulfone is contained in human skin, hair, nails, bones, muscles and organs. Dimethyl sulfone mainly exists in the ocean and soil in nature, and is absorbed as a nutrient in plant growth. Foreign countries use dimethyl sulfone as a nutrient as important as vitamins, but my country's application research on dimethyl sulfone has not been well carried out. Therefore, dimethyl sulfone is not only a high-tech product, but also a high-value-added fine chemical product. It has broad prospects for production and application development. Dimethyl sulfone can be prepared from sulfite and methanol by mixing sulfite with methanol; then heating the mixed solution to an appropriate reaction temperature, the solution will precipitate crystals, after the reaction is completed, the solution is cooled to room temperature, and the crystals in the solution are filtered or distilled to separate dimethyl sulfone. Finally, the separated dimethyl sulfone is dried to obtain the final product.

[0003] At present, when preparing dimethyl sulfone by mixing sulfite with methanol, the staff generally pours out all the sulfite from the mixing device first, and then continues to add methanol. As a result, the sulfite will be concentrated and accumulated, making it impossible for methanol to quickly contact and mix with all the accumulated sulfite, thereby affecting the reaction rate. In addition, when the solution is mixed, some of the crystals precipitated will adhere to the stirring blades, which is not only inconvenient for the solution to mix and react thoroughly, but also causes a waste of resources because the subsequent dimethyl sulfone crystals remain on the stirring blades and cannot be collected. Summary of the invention

[0004] The purpose of the present invention is to solve the problems that the existing dimethyl sulfone extraction device cannot intermittently pour sulfite and methanol into a mixing device in sequence and that part of the crystals precipitated from the solution will adhere to the stirring blades and affect the solution reaction.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: A dimethyl sulfone extraction device comprises a mixing box, a stirring mechanism arranged inside the mixing box, and a first feed hopper and a second feed hopper symmetrically arranged on both sides of the top of the mixing box, and further comprises: The blocking mechanism includes a fixed box arranged on the top wall of the mixing box, a sliding column slidably arranged on the side walls at both ends of the fixed box, a sealing plate arranged at one end of the sliding column away from the fixed box and in contact with the top wall of the mixing box, and a driving component arranged inside the fixed box for driving the two sliding columns to move in the same direction to achieve intermittent blocking of the discharge ports of the first feed hopper and the second feed hopper; The wall scraping mechanism comprises a scraping sleeve slidably arranged outside the stirring blade in the stirring mechanism and a propulsion component arranged between the stirring rod and the stirring blade of the stirring mechanism, wherein the propulsion component can push the scraping sleeve to slide back and forth against the outside of the stirring blade while the stirring rod rotates.

[0006] As a preferred technical solution of the present application, the drive assembly includes a motor arranged on the inner side wall of a fixed box, a first incomplete gear arranged at the output end of the motor, and an annular frame arranged between two sliding posts located on the inner end surfaces of the fixed box, and the inner top wall and the inner bottom wall of the annular frame are both provided with tooth grooves meshing with the first incomplete gear.

[0007] As a preferred technical solution of the present application, the stirring rod is rotatably arranged at the bottom of the fixed box, and a threaded groove is provided on the rod wall of the stirring rod near the bottom. The propulsion assembly includes a first gear arranged at one end of the stirring rod located inside the fixed box, a connecting column arranged at the bottom of the annular frame, a toothed plate arranged at the bottom of the connecting column and meshing with the first gear, a moving cylinder slidably arranged at the bottom of the mixing box and threadedly connected to the stirring rod, and a push rod hinged between the outer wall of the moving cylinder and the bottom of the scraper sleeve.

[0008] As a preferred technical solution of the present application, a curved rod is provided on the side wall of the scraper sleeve, an electric heating plate is provided at one end of the curved rod away from the scraper sleeve, and a battery box electrically connected to the electric heating plate is provided on the top of the electric heating plate.

[0009] As a preferred technical solution of the present application, a toggle mechanism is also provided inside the mixing box, and the toggle mechanism includes a rotating shaft rotatably arranged on the inner walls on both sides of the mixing box and extending toward the outside of one side of the mixing box, a toggle plate arranged on the rod wall inside the mixing box where the rotating shaft is located, a first rotating rod arranged on the end face of the first incomplete gear and extending outward through the mixing box, a second incomplete gear arranged on the first rotating rod at one end outside the mixing box, a second rotating rod rotatably arranged on the outer wall of the mixing box, a second gear arranged on the rod wall of the second rotating rod and meshing with the second incomplete gear, a torsion spring arranged on the rod wall of the second rotating rod between the second gear and the outer wall of the mixing box, and a pulley arranged between the second rotating rod and the rotating shaft.

[0010] As a preferred technical solution of the present application, a heat preservation cavity is provided in the inner wall of the mixing box, and a plurality of air inlet holes connected to the heat preservation cavity are also opened in the inner wall of the mixing box.

[0011] As a preferred technical solution of the present application, a filter box is provided at the bottom of the mixing box, a fixed frame is provided on the inner wall of the filter box, an elastic filter net is provided on the inner wall of the fixed frame, a pull rope is provided on the top of the elastic filter net, and a connector is provided at the end of the pull rope away from the elastic filter net, which is threadedly connected to the bottom of the moving cylinder, and the bottom of the moving cylinder extends through the mixing box to the inside of the filter box.

[0012] As a preferred technical solution of the present application, a feeding port is provided at the bottom of the mixing box, a partition is slidably provided on the inner wall of the feeding port, and a sliding surface is provided on the inner bottom wall of the mixing box which is gradually inclined toward the feeding port.

[0013] As a preferred technical solution of the present application, a bellows is provided at the bottom of the filter box, a fan is provided on the side wall of the bellows, a plurality of equally spaced exhaust outlets are provided at the bottom of the filter box, a plurality of fixed cylinders corresponding to the exhaust outlets are provided on the inner bottom wall of the bellows, a sliding rod is slidably provided inside the fixed cylinder, a spring is provided between the sliding rod and the inner bottom wall of the fixed cylinder, a sealing pad matching the exhaust outlet is provided on the top of the sliding rod, and the diameter of the sealing pad is larger than the diameter of the exhaust outlet.

[0014] The present invention also discloses an extraction method of a dimethyl sulfone extraction device, comprising the following steps: S1: First, nitrite and methanol are put into the first feed hopper and the second feed hopper respectively, and then the motor is started to drive the slide posts on both sides of the fixed box to reciprocate in the same direction through the first incomplete gear and the annular frame. Therefore, when one slide post blocks the discharge port of the first feed hopper through the sealing plate, the other slide post will release the discharge port of the second feed hopper through the sealing plate. The cycle can make the nitrite and methanol in the first feed hopper and the second feed hopper fall into the mixing box intermittently and be mixed in turn; S2: When the first incomplete gear rotates, it will also drive the rotating shafts on both sides of the mixing box to rotate back and forth through the first rotating rod, the second incomplete gear, the second rotating rod, the second gear, the torsion spring and the pulley. The rotating shaft will drive the shifting plate to flip back and forth to shift the fallen nitrite and methanol to the middle of the mixing box for contact reaction; S3: When nitrite and methanol fall into the mixing box in sequence, the solution can be heated by the electric heating plate to precipitate crystals from the reaction solution, and the toothed plate and the first gear can drive the stirring rod and the stirring blade to stir and mix the solution back and forth. At this time, the stirring rod can also drive the moving cylinder to move up and down, and the scraper sleeve can be attached to the surface of the stirring blade and move back and forth to scrape off some of the crystals attached to the surface of the stirring blade; S4: When the solution reaction is finished, stop heating, open the partition to let the solution and crystals fall into the filter box, first discharge the solution from the filter box to leave only the crystals, then connect the connector to the bottom of the moving cylinder, so that the moving cylinder sliding up and down will pull the drawstring and make the elastic filter net bounce up and down, bounce the accumulated crystals, and shake off the water droplets mixed in the crystals; S5: At the same time, the fan is started, and the sealing pad is blown upward and separated from the exhaust port under the action of high-pressure wind. The wind is blown evenly toward the crystals on the elastic filter through several exhaust ports, and the crystals are evenly dried to obtain dimethyl sulfone.

[0015] Compared with the prior art, the present invention has the following beneficial effects: First, nitrite and methanol are put into the first feed hopper and the second feed hopper respectively, and then the motor is started to drive the sliding columns on both sides of the fixed box to move back and forth in the same direction through the first incomplete gear and the annular frame. Therefore, when one sliding column blocks the discharge port of the first feed hopper through the sealing plate, the other sliding column will release the discharge port of the second feed hopper through the sealing plate. The cycle can make the nitrite and methanol in the first feed hopper and the second feed hopper fall into the mixing box intermittently in turn, so that nitrite and methanol are mixed with each other layer by layer, which is convenient for nitrite and methanol to contact and react quickly, and solves the problem of concentrated accumulation of nitrite caused by first adding nitrite and then adding methanol in the prior art, thereby causing methanol to be unable to contact and react quickly with the accumulated nitrite. When nitrite and methanol fall into the mixing box in sequence, the solution can be heated by the electric heating plate to precipitate crystals from the reaction solution, and the toothed plate and the first gear can drive the stirring rod and the stirring blade to stir and mix the solution back and forth to accelerate the reaction of the solution. At this time, the stirring rod can also drive the moving cylinder to move up and down, and make the scraper sleeve move back and forth on the surface of the stirring blade to scrape off some crystals attached to the surface of the stirring blade to continue the reaction, and the scraper sleeve can also drive the electric heating plate to rotate and move horizontally in the mixing box, so as to evenly heat the solution at different positions in the mixing box, further improve the reverse speed of the solution, and solve the problem in the prior art that some crystals adhere to the stirring blade and cannot be collected, resulting in waste of resources and incomplete reaction. When the solution reaction is finished, the heating is stopped, and the partition is opened to allow the solution and crystals to fall into the filter box. The solution is first discharged from the filter box to leave only the crystals, and then the connector is connected to the bottom of the moving cylinder. Therefore, the moving cylinder that slides up and down will also pull the draw rope and make the elastic filter net bounce up and down, thereby being able to bounce the crystals piled up together, which is convenient for shaking off water droplets mixed in the crystals and increasing the drying speed of the crystals. The fan can also be started to drive the sealing pad to move upward under the action of high-pressure wind force to open the exhaust port, so that the wind can pass through several exhaust ports and blow evenly onto the bounced crystals, which is convenient for quickly drying the crystals to obtain dimethyl sulfone crystals, solving the problem in the prior art that the static and piled crystals are blown through an air inlet but the crystals cannot be quickly and evenly dried. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall structure diagram of the present invention; Figure 2 It is one of the cross-sectional structural diagrams of the present invention; Figure 3 This is the second cross-sectional structural diagram of the present invention; Figure 4 It is a cross-sectional upward structural diagram of the present invention; Figure 5 It is a cross-sectional front view of the present invention; Figure 6It is the overall rear view structure diagram of the present invention; Figure 7 It is the structural diagram of the scraping mechanism and stirring mechanism of the present invention; Figure 8 It is a structural diagram of the driving assembly of the present invention; Fig. 9 The internal structure diagram of the bellows of the present invention; Fig.10 For the present invention Figure 3 The structure diagram at A is enlarged; Fig.11 For the present invention Figure 6 Enlarged structural diagram at point B in the middle.

[0017] Indicated in the figure: 1. Mixing box; 101. First feed hopper; 102. Second feed hopper; 103. Insulation chamber; 104. Air inlet; 2. Fixed box; 3. Sliding column; 301. Sealing plate; 4. Motor; 401. First incomplete gear; 402. First rotating rod; 403. Second incomplete gear; 5. Ring frame; 501. Connecting column; 502. Tooth plate; 6. Stirring rod; 601. Stirring blade; 602. First gear; 7. Moving cylinder; 701. Push rod; 8. Scraper sleeve; 801, curved rod; 9, electric heating plate; 10, filter box; 11, sliding surface; 12, partition; 13, fixed frame; 1301, elastic filter; 14, pull rope; 1401, connector; 15, bellows; 16, fan; 17, fixed cylinder; 1701, sliding rod; 1702, spring; 18, blocking pad; 19, rotating shaft; 1901, toggle plate; 1902, pulley; 20, second rotating rod; 2001, torsion spring; 2002, second gear. DETAILED DESCRIPTION

[0018] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0019] like Figures 1 to 5 As shown, this embodiment proposes a dimethyl sulfone extraction device, including a mixing box 1, a stirring mechanism arranged inside the mixing box 1, and a first feed hopper 101 and a second feed hopper 102 symmetrically arranged on both sides of the top of the mixing box 1, and also includes a blocking mechanism and a scraping mechanism, the blocking mechanism is used to intermittently block the discharge ports of the first feed hopper 101 and the second feed hopper 102, and the scraping mechanism is used to scrape off part of the crystals attached to the stirring blade 601; When dimethyl sulfone needs to be prepared, sulfite and methanol are first added to the first feed hopper 101 and the second feed hopper 102 respectively, and then fall into the mixing box 1. The sulfite and methanol can be stirred by the stirring mechanism to increase the mixing reaction speed of the solution. At the same time, the discharging ends of the first feed hopper 101 and the second feed hopper 102 can be intermittently blocked in sequence by the blocking mechanism. Therefore, sulfite and methanol can be sequentially dropped into the mixing box 1, which is convenient for sulfite and methanol to be mixed with each other, thereby increasing the contact speed between the two and thus increasing the reaction speed of the solution. Moreover, crystals will precipitate when the solutions are mixed, and some of the crystals will adhere to the surface of the stirring blade 601. Therefore, the scraping mechanism can be used to scrape off the crystals attached to the surface of the stirring blade 601 when the stirring blade 601 rotates, which can not only further facilitate the thorough mixing reaction of the solution, but also avoid the waste of resources caused by the subsequent inability to collect the crystals.

[0020] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig.10 and Fig.11 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the blocking mechanism includes a fixed box 2 arranged on the inner top wall of the mixing box 1, a sliding column 3 slidably arranged on the side walls at both ends of the fixed box 2, a sealing plate 301 arranged at one end of the sliding column 3 away from the fixed box 2 and in contact with the inner top wall of the mixing box 1, and a driving component arranged inside the fixed box 2 for driving the two sliding columns 3 to move in the same direction to achieve intermittent blocking of the discharge ports of the first feed hopper 101 and the second feed hopper 102; The driving assembly includes a motor 4 arranged on the inner wall of the fixed box 2, a first incomplete gear 401 arranged at the output end of the motor 4, and an annular frame 5 arranged between the two slide posts 3 located at the inner end surfaces of the fixed box 2, and the inner top wall and the inner bottom wall of the annular frame 5 are both provided with tooth grooves meshing with the first incomplete gear 401; When sulfite and methanol are added, the motor 4 can be started to drive the first incomplete gear 401 connected to its output end to rotate, and the first incomplete gear 401 will drive the annular frame 5 and the two slide pillars 3 to move back and forth. Therefore, when one slide pillar 3 drives the sealing plate 301 to seal the discharge end of the first feed hopper 101, the other slide pillar 3 will drive the sealing plate 301 to open the discharge end of the second feed hopper 102. When one slide pillar 3 drives the sealing plate 301 to open the discharge end of the first feed hopper 101, the other slide pillar 3 will drive the sealing plate 301 to block the discharge end of the second feed hopper 102. 2, so that the sulfite in the first feed hopper 101 and the methanol in the second feed hopper 102 can be intermittently dropped into the mixing box 1 in sequence, and the sulfite and the methanol will be mixed with each other layer by layer, so that the sulfite and the methanol can quickly contact and react. In addition, in order to clearly see the liquid level of the solution inside the mixing box 1, a transparent observation window can be provided on the outside of the mixing box 1, and a scale groove can be provided on the surface of the observation window, so that the staff can see the specific liquid level of the solution put into the mixing box 1, so as to avoid too much solution being submerged in the fixed box 2 and affecting the operation of the blocking mechanism.

[0021] The mixing box 1 is also provided with a toggle mechanism, which includes a rotating shaft 19 rotatably arranged on the inner walls of both sides of the mixing box 1 and extending toward the outside of one side of the mixing box 1, a toggle plate 1901 arranged on the rotating shaft 19 on the rod wall inside the mixing box 1, a first rotating rod 402 arranged on the end face of the first incomplete gear 401 and extending outward through the mixing box 1, a second incomplete gear 403 arranged on the first rotating rod 402 at one end outside the mixing box 1, a second rotating rod 20 rotatably arranged on the outer wall of the mixing box 1, a second gear 2002 arranged on the rod wall of the second rotating rod 20 and meshing with the second incomplete gear 403, a torsion spring 2001 arranged on the rod wall of the second rotating rod 20 between the second gear 2002 and the outer wall of the mixing box 1, and a pulley 1902 arranged between the second rotating rod 20 and the rotating shaft 19; when the first incomplete gear 401 rotates, the second incomplete gear 403 is also driven to rotate through the first rotating rod 402, and the second incomplete gear 403 rotates to the side with teeth When the second gears 2002 on both sides thereof come into contact, the second gears 2002 and the second rotating rod 20 will be driven to rotate and the torsion spring 2001 will be rotated. When the second incomplete gear 403 rotates to the side without teeth and comes into contact with the second gears 2002 on both sides thereof, the torsion spring 2001 will be released from the force and drive the second rotating rod 20 to reverse and reset, thereby being able to drive the rotating shaft 19 and the toggle plate 1901 to reciprocate through the pulley 1902. Therefore, the toggle plate 1901 located below the discharge ends of the first feed hopper 101 and the second feed hopper 102 will toggle the falling sulfite and methanol toward the middle of the mixing box 1, further facilitating the contact reaction between the two. In addition, in order to prevent the second rotating rod 20, the second incomplete gear 403, the second gear 2002, the torsion spring 2001 and the pulley 1902 and other components from being exposed to the outside of the mixing box 1 and being damaged by collision with foreign objects, a protective cover can be provided on the outside of the mixing box 1 to shield and protect the above components to prevent damage to the components from affecting the normal operation of the toggle mechanism.

[0022] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the wall scraping mechanism includes a scraping sleeve 8 slidably arranged outside the stirring blade 601 in the stirring mechanism and a propulsion component arranged between the stirring rod 6 of the stirring mechanism and the stirring blade 601, wherein the propulsion component can push the scraping sleeve 8 to slide reciprocatingly on the outside of the stirring blade 601 while the stirring rod 6 rotates; The stirring rod 6 is rotatably arranged at the bottom of the fixed box 2, and a threaded groove is arranged on the rod wall of the stirring rod 6 near the bottom. The propulsion assembly includes a first gear 602 arranged at one end of the stirring rod 6 located inside the fixed box 2, a connecting column 501 arranged at the bottom of the annular frame 5, a tooth plate 502 arranged at the bottom of the connecting column 501 and meshing with the first gear 602, a moving cylinder 7 slidably arranged at the bottom of the mixing box 1 and threadedly connected to the stirring rod 6, and a push rod 701 hinged between the outer wall of the moving cylinder 7 and the bottom of the scraper sleeve 8; A curved rod 801 is provided on the side wall of the scraper sleeve 8, an electric heating plate 9 is provided at one end of the curved rod 801 away from the scraper sleeve 8, and a battery box electrically connected to the electric heating plate 9 is provided on the top of the electric heating plate 9; When the annular frame 5 slides back and forth inside the fixed box 2, the annular frame 5 will drive the stirring rod 6 provided with the first gear 602 to rotate back and forth through the tooth plate 502 at the bottom thereof, so as to drive the stirring blade 601 to rotate back and forth. It is easy to stir in two opposite directions. In the prior art, the stirring blade 601 only stirs the solution in one direction, which can improve the reaction speed of the solution. Moreover, when the stirring rod 6 reciprocates, it will also drive the moving cylinder 7 on the rod wall at its bottom to move up and down. Therefore, the moving cylinder 7 will squeeze the scraping sleeve 8 back and forth through the movable push rod 701. Therefore, when the stirring blade 601 rotates, the scraping sleeve 8 will stick to the surface of the stirring blade 601 and move back and forth. Sliding can facilitate scraping off some of the crystals precipitated from the solution and attached to the surface of the stirring blade 601, which can not only make the solution continue to react thoroughly, but also avoid the waste of resources caused by the subsequent inability to collect the crystals completely. The solution can be heated by the set electric heating plate 9, which is convenient for further improving the reaction speed of the solution and precipitating crystals. The electric heating plate 9 will rotate and move horizontally along the axis of the stirring rod 6 with the scraping sleeve 8, which is convenient for uniform heating of the solution at various positions in the mixing box 1. It should be noted that the heating temperature is usually controlled between 100-150°C, and the reaction time of the solution is about several hours, which should not be too short.

[0023] In addition, a heat preservation chamber 103 is provided in the inner wall of the mixing box 1, and a plurality of air inlet holes 104 connected to the heat preservation chamber 103 are also opened in the inner wall of the mixing box 1; when the solution is heated, part of the hot air will enter the heat preservation chamber 103 through the air inlet holes 104, so the interior of the mixing box 1 can be kept warm to prevent the heat from being lost too quickly and affecting the solution reaction.

[0024] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, a filter box 10 is provided at the bottom of the mixing box 1, a fixing frame 13 is provided on the inner wall of the filter box 10, an elastic filter screen 1301 is provided on the inner wall of the fixing frame 13, a pull rope 14 is provided on the top of the elastic filter screen 1301, and a connector 1401 threadedly connected to the bottom of the moving cylinder 7 is provided at one end of the pull rope 14 away from the elastic filter screen 1301, and the bottom of the moving cylinder 7 passes through the mixing box 1 and extends to the inside of the filter box 10; A material drop opening is provided at the bottom of the mixing box 1, a partition 12 is slidably provided on the inner wall of the material drop opening, and a sliding surface 11 which is gradually inclined toward the material drop opening is provided on the inner bottom wall of the mixing box 1; When the solution reaction is completed, the partition 12 is pulled out to allow the solution and the crystals mixed therein to fall into the filter box 10 through the drop port. The inclined sliding surface 11 is provided to facilitate the crystals to roll completely into the filter box 10, and then the solution is discharged through the drain pipe provided on the side wall of the filter box 10, and the precipitated crystals will be blocked and filtered on the elastic filter net 1301. Then, the box door of the side wall of the filter box 10 is opened, and the connector 1401 at the top of the pull rope 14 is threadedly connected to the bottom of the moving cylinder 7, and then the motor 4 is started to continue to drive the stirring rod 6 and the stirring blade 601 to rotate, which can not only further shake off the crystals and solution attached to the stirring blade 601, but also enable the moving cylinder 7 sliding up and down to pull the elastic filter net 1301 through the pull rope 14, so that the elastic filter net 1301 will bounce and disperse the crystals accumulated on its surface, which is convenient for further shaking off the water stains attached to the crystals and improving the drying speed of the crystals.

[0025] like Figure 2 , Figure 4 and Fig. 9 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, a wind box 15 is provided at the bottom of the filter box 10, a fan 16 is provided on the side wall of the wind box 15, a plurality of equally spaced exhaust ports are opened at the bottom of the filter box 10, a plurality of fixed cylinders 17 corresponding to the exhaust ports are provided on the inner bottom wall of the wind box 15, a slide bar 1701 is slidably provided inside the fixed cylinder 17, a spring 1702 is provided between the slide bar 1701 and the inner bottom wall of the fixed cylinder 17, a plugging pad 18 matching the exhaust port is provided on the top of the slide bar 1701, and the diameter of the plugging pad 18 is larger than the diameter of the exhaust port; Under normal conditions, the blocking pad 18 will be pulled by the spring 1702 to block the exhaust port. When the fan 16 is started, the fan 16 will pass high-pressure wind into the bellows 15. The high-pressure wind will blow the blocking pad 18, so that the blocking pad 18 can slide upward through the slide bar 1701 to detach from the exhaust port. At this time, several exhaust ports are opened, and the wind will pass through several exhaust ports and blow evenly onto the crystals in the filter box 10, so as to evenly dry the scattered crystals. Compared with the prior art that only one air inlet is used to dry the concentrated and accumulated crystals, the above-mentioned drying method can increase the drying speed of the crystals, thereby facilitating the rapid and convenient preparation of dimethyl sulfone crystals.

[0026] The working principle of the present invention is as follows: when dimethyl sulfone needs to be prepared, sulfite and methanol are first added to the first feed hopper 101 and the second feed hopper 102 respectively, and fall into the mixing box 1, and then the motor 4 is started to drive the first incomplete gear 401 connected to its output end to rotate, and the first incomplete gear 401 will drive the annular frame 5 and the two slide columns 3 to move back and forth. Therefore, when one slide column 3 drives the sealing plate 301 to seal the discharge end of the first feed hopper 101, the other slide column 3 will drive the sealing plate 301 to open the discharge end of the second feed hopper 102, so that the sulfite in the first feed hopper 101 and the methanol in the second feed hopper 102 can be intermittently dropped into the mixing box 1 in turn, and the sulfite and methanol will be mixed with each other layer by layer, so that the sulfite and methanol can quickly contact and react. And when the annular frame 5 slides back and forth inside the fixed box 2, the annular frame 5 will drive the stirring rod 6 provided with the first gear 602 to rotate back and forth through the tooth plate 502 at its bottom, and then drive the moving cylinder 7 on the rod wall at its bottom to move up and down. Therefore, the moving cylinder 7 will squeeze the scraper sleeve 8 back and forth through the movably arranged push rod 701. Therefore, when the stirring blade 601 rotates, the scraper sleeve 8 will slide back and forth on the surface of the stirring blade 601, so as to facilitate the scraping off of part of the crystals precipitated from the solution and attached to the surface of the stirring blade 601, which can not only make the solution continue to react thoroughly, but also avoid the subsequent waste of resources caused by the inability to collect the crystals completely, and the solution can be heated by the arranged electric heating plate 9, so as to further increase the reaction speed of the solution and precipitate crystals, and the electric heating plate 9 will rotate and move horizontally along the axis of the stirring rod 6 with the scraper sleeve 8, so as to facilitate the uniform heating of the solution at various positions in the mixing box 1. Finally, when the solution reaction is completed, pull out the partition 12, so that the solution and the crystals mixed therein fall into the filter box 10 through the drop port, and then the solution is discharged through the drain pipe arranged on the side wall of the filter box 10, and the precipitated crystals will be blocked and filtered on the elastic filter net 1301, and then open the box door on the side wall of the filter box 10, and then the connector 1401 at the top of the pull rope 14 is threadedly connected to the bottom of the moving cylinder 7, and then start the motor 4 to continue to drive the stirring rod 6 and the stirring blade 601 to rotate, which can not only further shake off the crystals and solution attached to the stirring blade 601, but also make the moving cylinder 7 sliding up and down pull the elastic filter net 1301 through the pull rope 14, so that the elastic filter net 1301 will bounce and scatter the crystals accumulated on its surface, so as to further shake off the water stains attached to the crystals and improve the drying speed of the crystals.At the same time, when the fan 16 is started, the fan 16 passes high-pressure wind into the bellows 15, and the high-pressure wind will blow the blocking pad 18, so that the blocking pad 18 can slide upward through the slide bar 1701 to leave the exhaust port. At this time, several exhaust ports are opened, and the wind will pass through several exhaust ports and blow evenly onto the crystals in the filter box 10, so as to evenly dry the scattered crystals. Compared with the prior art that only uses one air inlet to dry the concentrated and accumulated crystals, the above-mentioned drying method can increase the drying speed of the crystals, thereby facilitating the rapid preparation of dimethyl sulfone crystals.

[0027] The present invention also discloses an extraction method of a dimethyl sulfone extraction device, comprising the following steps: S1: First, nitrite and methanol are respectively put into the first feed hopper 101 and the second feed hopper 102, and then the motor 4 is started to work to drive the slide posts 3 on both sides of the fixed box 2 to reciprocate in the same direction through the first incomplete gear 401 and the annular frame 5. Therefore, when one slide post 3 blocks the discharge port of the first feed hopper 101 through the sealing plate 301, the other slide post 3 will release the discharge port of the second feed hopper 102 through the sealing plate 301. The cycle can make the nitrite and methanol in the first feed hopper 101 and the second feed hopper 102 fall into the mixing box 1 intermittently in turn and be mixed; S2: When the first incomplete gear 401 rotates, it will also drive the rotating shafts 19 on both sides of the mixing box 1 to rotate back and forth through the first rotating rod 402, the second incomplete gear 403, the second rotating rod 20, the second gear 2002, the torsion spring 2001 and the pulley 1902. The rotating shaft 19 will drive the shifting plate 1901 to flip back and forth to shift the fallen nitrite and methanol to the middle of the mixing box 1 for contact reaction; S3: When nitrite and methanol fall into the mixing box 1 in sequence, the electric heating plate 9 can heat the solution to precipitate crystals from the reaction solution, and the toothed plate 502 and the first gear 602 can drive the stirring rod 6 and the stirring blade 601 to stir and mix the solution back and forth. At this time, the stirring rod 6 can also drive the moving cylinder 7 to move up and down, and the scraper sleeve 8 is attached to the surface of the stirring blade 601 and moves back and forth to scrape off some of the crystals attached to the surface of the stirring blade 601; S4: When the solution reaction is finished, the heating is stopped, and the partition 12 is opened to allow the solution and the crystals to fall into the filter box 10. The solution is first discharged from the filter box 10 to leave only the crystals, and then the connector 1401 is connected to the bottom of the moving cylinder 7. The moving cylinder 7 sliding up and down will pull the pull rope 14 and make the elastic filter net 1301 bounce up and down, bounce the accumulated crystals, and shake off the water droplets mixed in the crystals; S5: At the same time, the fan 16 is started to work. Under the action of high-pressure wind, the sealing pad 18 will be blown upward and separated from the exhaust port. The wind will evenly blow toward the crystals on the elastic filter 1301 through several exhaust ports, and the crystals will be evenly dried to obtain dimethyl sulfone.

[0028] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; all technical solutions and improvements that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A dimethyl sulfone extraction device, comprising a mixing box (1), a stirring mechanism arranged inside the mixing box (1), and a first feed hopper (101) and a second feed hopper (102) symmetrically arranged on both sides of the top of the mixing box (1), characterized in that: Also includes: A blocking mechanism, the blocking mechanism comprising a fixed box (2) arranged on the inner top wall of the mixing box (1), a sliding column (3) slidably arranged on the side walls at both ends of the fixed box (2), a sealing plate (301) arranged at one end of the sliding column (3) away from the fixed box (2) and in contact with the inner top wall of the mixing box (1), and a driving component arranged inside the fixed box (2) for driving the two sliding columns (3) to move in the same direction to achieve intermittent blocking of the discharge ports of the first feed hopper (101) and the second feed hopper (102); A wall scraping mechanism, the wall scraping mechanism comprising a scraping sleeve (8) slidably arranged outside a stirring blade (601) in a stirring mechanism, and a propulsion component arranged between a stirring rod (6) of the stirring mechanism and the stirring blade (601), wherein the propulsion component can push the scraping sleeve (8) to slide reciprocatingly against the outside of the stirring blade (601) while the stirring rod (6) rotates.

2. A dimethyl sulfone extraction device according to claim 1, characterized in that: The drive assembly comprises a motor (4) arranged on the inner side wall of a fixed box (2), a first incomplete gear (401) arranged at the output end of the motor (4), and an annular frame (5) arranged between two slide posts (3) located on the inner end surfaces of the fixed box (2), wherein the inner top wall and the inner bottom wall of the annular frame (5) are both provided with tooth grooves meshing with the first incomplete gear (401).

3. A dimethyl sulfone extraction device according to claim 1, characterized in that: The stirring rod (6) is rotatably arranged at the bottom of the fixed box (2), and a threaded groove is provided on the rod wall of the stirring rod (6) near the bottom. The propulsion assembly comprises a first gear (602) arranged at one end of the stirring rod (6) located inside the fixed box (2), a connecting column (501) arranged at the bottom of the annular frame (5), a toothed plate (502) arranged at the bottom of the connecting column (501) and meshing with the first gear (602), a moving cylinder (7) slidably arranged at the bottom of the mixing box (1) and threadedly connected to the stirring rod (6), and a push rod (701) hinged between the outer wall of the moving cylinder (7) and the bottom of the scraper sleeve (8).

4. A dimethyl sulfone extraction device according to claim 3, characterized in that: A curved rod (801) is provided on the side wall of the scraper sleeve (8), an electric heating plate (9) is provided at one end of the curved rod (801) away from the scraper sleeve (8), and a battery box electrically connected to the electric heating plate (9) is provided on the top of the electric heating plate (9).

5. A dimethyl sulfone extraction device according to claim 2, characterized in that: The mixing box (1) is also provided with a toggle mechanism inside, the toggle mechanism comprising a rotating shaft (19) rotatably arranged on the inner walls of both sides of the mixing box (1) and extending toward the outside of one side of the mixing box (1), a toggle plate (1901) arranged on the rotating shaft (19) on the rod wall inside the mixing box (1), a first rotating rod (402) arranged on the end surface of the first incomplete gear (401) and extending outward through the mixing box (1), a second incomplete gear (403) arranged on the first rotating rod (402) at one end outside the mixing box (1), a second rotating rod (20) rotatably arranged on the outer wall of the mixing box (1), a second gear (2002) arranged on the rod wall of the second rotating rod (20) and meshing with the second incomplete gear (403), a torsion spring (2001) arranged on the rod wall of the second rotating rod (20) between the second gear (2002) and the outer wall of the mixing box (1), and a pulley (1902) arranged between the second rotating rod (20) and the rotating shaft (19).

6. A dimethyl sulfone extraction device according to claim 1, characterized in that: A heat preservation cavity (103) is provided in the inner wall of the mixing box (1), and a plurality of air inlet holes (104) connected to the heat preservation cavity (103) are also provided in the inner wall of the mixing box (1).

7. A dimethyl sulfone extraction device according to claim 3, characterized in that: A filter box (10) is provided at the bottom of the mixing box (1), a fixing frame (13) is provided on the inner wall of the filter box (10), an elastic filter net (1301) is provided on the inner wall of the fixing frame (13), a pull rope (14) is provided on the top of the elastic filter net (1301), and a connector (1401) is provided at one end of the pull rope (14) away from the elastic filter net (1301) and is threadedly connected to the bottom of the moving cylinder (7), and the bottom of the moving cylinder (7) passes through the mixing box (1) and extends to the interior of the filter box (10).

8. A dimethyl sulfone extraction device according to claim 7, characterized in that: The mixing box (1) has a material drop opening at the bottom, a partition (12) is slidably provided on the inner wall of the material drop opening, and a sliding surface (11) is provided on the inner bottom wall of the mixing box (1) which gradually inclines toward the material drop opening.

9. A dimethyl sulfone extraction device according to claim 8, characterized in that: A bellows (15) is provided at the bottom of the filter box (10), a fan (16) is provided on the side wall of the bellows (15), a plurality of equally spaced exhaust ports are provided at the bottom of the filter box (10), a plurality of fixed cylinders (17) corresponding to the exhaust ports are provided on the inner bottom wall of the bellows (15), a sliding rod (1701) is slidably provided inside the fixed cylinder (17), a spring (1702) is provided between the sliding rod (1701) and the inner bottom wall of the fixed cylinder (17), a blocking pad (18) matching the exhaust port is provided on the top of the sliding rod (1701), and the diameter of the blocking pad (18) is larger than the diameter of the exhaust port.

10. The extraction method of a dimethyl sulfone extraction device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: First, nitrite and methanol are respectively put into the first feed hopper (101) and the second feed hopper (102), and then the motor (4) is started to work through the first incomplete gear (401) and the annular frame (5) to drive the slide columns (3) on both sides of the fixed box (2) to reciprocate in the same direction, so that when one slide column (3) blocks the discharge port of the first feed hopper (101) through the sealing plate (301), the other slide column (3) will release the discharge port of the second feed hopper (102) through the sealing plate (301), and the cycle can be repeated in sequence to make the nitrite and methanol in the first feed hopper (101) and the second feed hopper (102) fall into the mixing box (1) intermittently and be mixed; S2: When the first incomplete gear (401) rotates, it also drives the rotating shafts (19) on both sides of the mixing box (1) to rotate back and forth through the first rotating rod (402), the second incomplete gear (403), the second rotating rod (20), the second gear (2002), the torsion spring (2001) and the pulley (1902). The rotating shaft (19) drives the shifting plate (1901) to shift back and forth to shift the fallen nitrite and methanol to the middle of the mixing box (1) for contact reaction; S3: When nitrite and methanol fall into the mixing box (1) in sequence, the solution can be heated by the electric heating plate (9) to precipitate crystals from the reaction solution, and the toothed plate (502) and the first gear (602) can drive the stirring rod (6) and the stirring blade (601) to stir and mix the solution back and forth. At this time, the stirring rod (6) can also drive the moving cylinder (7) to move up and down, and make the scraper sleeve (8) stick to the surface of the stirring blade (601) and move back and forth to scrape off some of the crystals attached to the surface of the stirring blade (601); S4: When the solution reaction is finished, the heating is stopped, and the partition (12) is opened to allow the solution and the crystals to fall into the filter box (10). The solution is first discharged from the filter box (10) to leave only the crystals, and then the connector (1401) is connected to the bottom of the moving cylinder (7). The moving cylinder (7) slides up and down, so that the pull rope (14) is pulled and the elastic filter net (1301) is bounced up and down, so that the accumulated crystals are bounced up and the water droplets mixed in the crystals are shaken off. S5: At the same time, the fan (16) is started to work. Under the action of high-pressure wind, the sealing pad (18) will be blown upward and separated from the exhaust port. The wind will evenly blow toward the crystals on the elastic filter (1301) through a number of exhaust ports, and the crystals will be evenly dried to obtain dimethyl sulfone.

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