Experimental device and method for improving PVB synthesis uniformity based on static mixer

Abstract

The invention discloses an experimental device for improving PVB synthesis uniformity based on a static mixer and a method thereof, and relates to the technical field of mixers.The experimental device comprises a stirring tank, a butyraldehyde pump fixedly installed at the top of the stirring tank, a hydrochloric acid pump fixedly installed at the top of the stirring tank, an auxiliary pump and a mixing device fixedly installed at the top of the stirring tank; the mixing device is arranged in the stirring tank, and the stirring device comprises a motor, static mixing equipment, a temperature detector, a temperature adjusting device, a conductivity meter, an electric telescopic rod, a storage rack, a reciprocating screw rod, a shearing stirrer, an L-shaped rod, a threaded block, a U-shaped frame, a rack, a gear, a rotating rod and an overturning plate; the solid acid is separated from the solution, the problems that the polymerization speed is too high, potential safety hazards exist, the solution precipitated at the bottom can be pushed upwards through rotation of the overturning plate, the solution is precipitated at the bottom, the synthesis uniformity is reduced, and the reaction effect is affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of mixers, and in particular to an experimental device and a method for improving the uniformity of PVB synthesis based on a static mixer. Background Art

[0002] The experimental device for improving the uniformity of PVB synthesis with a static mixer conducts reactions through a stirring tank, and uses a static mixer to mix the raw materials inside the stirring tank to improve the stirring and mixing effect of the raw materials. At the same time, a temperature regulating device is used to adjust to the appropriate temperature required for each reaction stage, and a step-by-step acid addition device is used to control the conductivity and pH value during the reaction to improve the mixing reaction effect.

[0003] The patent with patent announcement number CN218654490U relates to a mixing and stirring reactor, including a reactor body, a connecting block is provided on the top wall inside the reactor body, a main bevel gear is provided at the bottom of the connecting block, a slot is provided in the middle of the main bevel gear, a motor is provided on the top of the reactor body, a rotating rod passing through the slot is provided at the bottom of the motor, a first connecting plate arranged horizontally is fixedly connected to the bottom of the rotating rod, a movable rod is provided at the tail end of the first connecting plate, the movable rod is placed at 45° inside the reactor body, a secondary bevel gear meshingly connected to the main bevel gear is provided at the top of the movable rod, and a stirring blade is provided at the tail end of the movable rod. The patent has a simple structure, a reasonable design, and is easy to use. The stirring blade arranged in the reactor body can rotate 360 ​​degrees, and the stirring blade can be made to rotate around the middle and lower end of the stirring reactor body by a clamping ball, so as to achieve sufficient and rapid mixing and stirring of the mixed liquid in the reactor, make the reaction more thorough, improve the performance of the reactor, and improve the quality of the output material.

[0004] In the above patent, the stirring blades arranged in the reactor body can rotate 360 ​​degrees, and the clamping ball can make the stirring blades rotate around the middle and lower ends of the reactor body, so as to achieve sufficient and rapid mixing and stirring of the mixed liquid in the reactor, making the reaction more thorough, improving the performance of the reactor, and improving the quality of the output material. However, the raw materials may settle at the bottom during the mixing process, resulting in insufficient raw material mixing effect and affecting the reaction efficiency. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an experimental device and method for improving the uniformity of PVB synthesis based on a static mixer, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an experimental device for improving the uniformity of PVB synthesis based on a static mixer, comprising: a stirring tank, a butyraldehyde pump is fixedly installed on the top of the stirring tank, a hydrochloric acid pump is fixedly installed on the top of the stirring tank, an additive pump is fixedly installed on the top of the stirring tank, and a mixing device is arranged inside the stirring tank. The stirring device includes a motor, a static mixing device, a temperature detector, a temperature regulating device, a conductivity meter, an electric telescopic rod, a storage rack, a reciprocating screw, a shear stirrer, an L-shaped rod, a threaded block, a U-shaped rack, a rack, a gear, a rotating rod and a flip plate. First, hydrochloric acid is pumped into the stirring tank to fuse with butyraldehyde, and then the static mixing device is used to mix the raw materials inside the stirring tank to improve the stirring and mixing effect of the raw materials, and the temperature regulating device is used to adjust to the appropriate temperature required for each reaction stage. The motor is fixedly installed on the top of the stirring tank, the static mixing device is fixedly installed on the output end of the motor, and the temperature detector is fixedly installed on the output end of the motor. The device is fixedly mounted on the top of the stirring tank, the temperature regulating device is fixedly mounted on the surface of the stirring tank, the conductivity meter is fixedly mounted on the surface of the stirring tank, the electric telescopic rod is fixedly mounted on the top of the inner wall of the stirring tank, the storage rack is fixedly mounted on the output end of the electric telescopic rod, the reciprocating screw is fixedly mounted on the bottom of the static mixing device, the shear agitator is fixedly mounted on the bottom of the reciprocating screw, the L-shaped rod is fixedly mounted on the inner wall of the stirring tank, the threaded block is threadedly mounted on the surface of the reciprocating screw, the U-shaped frame is fixedly mounted on the surface of the L-shaped rod, the rack is fixedly mounted on the surface of the threaded block, the gear is rotatably mounted on the surface of the threaded block, the rack and the gear surface are meshed, the rotating rod is fixedly mounted on the surface of the gear, and the flip plate is fixedly mounted on the circumferential surface of the rotating rod. The rotation of the static mixing device will drive the reciprocating screw to rotate, the rotation of the reciprocating screw will drive the shear agitator to rotate, the rotation of the shear agitator will crush the generated polymer, and when the polymerization speed is too slow, the rotation of the rotating rod will drive the flip plate to rotate.

[0007] According to the above technical solution, the L-shaped rod passes through the surface of the threaded block, and solid acid is arranged inside the storage rack to produce a polymer through the solid acid reaction.

[0008] According to the above technical solution, the reciprocating screw is provided with an anti-adhesion device to prevent polymer adhesion, and the anti-adhesion device is provided with a crushing device. The anti-adhesion device includes a spiral barrel, a connecting rod, an elastic telescopic rod, a slide rail, a slider, an elastic telescopic block and a scraper. When the threaded block moves upward, it will push the spiral barrel to move upward. The spiral barrel will rotate under the guidance of the spiral groove when it moves upward, and the rotation of the spiral barrel will drive the connecting rod to rotate. The surface of the L-shaped rod is provided with a spiral groove, the spiral barrel is threadedly installed on the surface of the L-shaped rod, the connecting rod is fixedly installed on the surface of the spiral barrel, the elastic telescopic rod is fixedly installed at the bottom of the connecting rod, the slide rail is fixedly installed on the inner wall of the mixing tank, one end of the slider is fixedly installed on the free end of the elastic telescopic rod, and the other end of the slider is slidably installed on the inner wall of the slide rail, the elastic telescopic block is fixedly installed at the bottom of the slider, and the scraper is fixedly installed at the bottom of the elastic telescopic block.

[0009] According to the above technical solution, a semicircular block is fixedly installed on the top of the scraper, and a pulley frame is fixedly installed on the bottom of the slide rail. The rotation of the scraper will drive the semicircular block to rotate, and the rotation of the semicircular block will contact the pulley frame. The pulley frame will squeeze the semicircular block to move downward, and the downward movement of the semicircular block will drive the scraper to move downward. During the scraping process, the up and down reciprocating motion of the scraper will shake off the attached polymer.

[0010] According to the above technical solution, the threaded block is arranged below the spiral cylinder, the semicircular block is arranged below the pulley frame, and a reset spring is arranged between the slider and the slide rail, and the slider is reset by the reset spring.

[0011] According to the above technical solution, the crushing device includes a push plate, a sliding ring and a filter plate. The rotation of the scraper will drive the push plate to rotate, and the rotation of the push plate will push the precipitated polymer to the middle of the filter plate. The push plate is fixedly installed on the surface of the scraper, a slide groove is opened at the bottom of the stirring tank, the sliding ring is slidably installed on the inner wall of the slide groove, and the filter plate is fixedly installed on the top of the sliding ring.

[0012] According to the above technical solution, a fixed plate is fixedly installed on the top of the filter plate, a rotating rod is rotatably installed on the surface of the fixed plate, a rotating plate is fixedly installed on the surface of the rotating rod, and a limiting block is fixedly installed on the surface of the fixed plate. The push plate will contact the rotating plate during rotation, and the rotating plate is limited by the limiting block, so that the push plate pushes the rotating plate to slide upward during rotation. The upward sliding of the rotating plate will drive the fixed plate to move upward, and the upward movement of the fixed plate will drive the filter plate to move upward.

[0013] According to the above technical solution, a No. 1 spring is arranged between the sliding ring and the sliding groove, and the sliding ring is reset by the No. 1 spring. A No. 1 torsion spring is arranged between the rotating rod and the fixed plate, and the rotating rod is reset by the No. 1 torsion spring. The rotating plate contacts the surface of the limit block.

[0014] A method for using an experimental device for improving PVB synthesis uniformity based on a static mixer comprises the following steps: Step 1: First, pump hydrochloric acid into the mixing tank to mix with butyraldehyde, and then use a static mixing device to mix the raw materials inside the mixing tank to improve the mixing effect of the raw materials; Step 2: Use the temperature regulating device to adjust to the appropriate temperature required for each reaction stage, and use the hydrochloric acid pump and the auxiliary pump to control the conductivity and pH value during the reaction. The conductivity and pH value are displayed on the conductivity meter. The reaction progress deduced from the conductivity is as follows: kt=b(G0-Gt) / cb[(G0-G∞)-(G0-Gt)]= (G0-Gt) / c(G0-G∞); Step 3: The electric telescopic rod moves downward to drive the storage rack to move downward. The solid acid catalyzes the solution inside the storage rack to produce a polymerization reaction. When the reaction is too intense, the electric telescopic rod drives the storage rack to move upward, and the solid acid is separated from the solution to prevent the polymerization speed from being too fast, which poses a safety hazard. Step 4: The static mixing device rotates to drive the reciprocating screw to rotate, and the reciprocating screw rotates to drive the shearing agitator to rotate. The shearing agitator rotates to crush the generated polymer. When the polymerization speed is too slow, the electric telescopic rod is restarted to drive the solid acid to move downward for reaction; Step 5: The reciprocating screw rotates to drive the threaded block to move up and down, and the up and down reciprocating motion of the threaded block drives the gear to move up and down. The gear contacts the rack during the up and down reciprocating motion, and the rack drives the gear to rotate during the up and down movement. The rotation of the gear drives the rotating rod to rotate, and the rotation of the rotating rod drives the flip plate to rotate. The rotation of the flip plate pushes the solution precipitated at the bottom upward to prevent the solution from precipitating at the bottom, resulting in reduced synthesis uniformity and affecting the reaction efficiency.

[0015] The present invention provides an experimental device and method for improving the uniformity of PVB synthesis based on a static mixer, which has the following beneficial effects: (1) The invention first pumps hydrochloric acid into a stirring tank to fuse with butyraldehyde, then uses a static mixing device to mix the raw materials inside the stirring tank to improve the stirring and mixing effect of the raw materials, cooperates with a temperature regulating device to adjust to the appropriate temperature required for each reaction stage, and controls the conductivity and pH value during the reaction process through a hydrochloric acid pump and an auxiliary agent pump. The storage rack moves downward and the solid acid catalyzes the solution inside. The catalysis will produce a polymerization reaction to produce a polymer. When the reaction is too intense, the electric telescopic rod will drive the storage rack to move upward to separate the solid acid from the solution to prevent the polymerization speed from being too fast, which poses a safety hazard. The rotation of the rotating rod will drive the flip plate to rotate, and the rotation of the flip plate will push the solution precipitated at the bottom upward to prevent the solution from precipitating at the bottom, resulting in reduced synthesis uniformity and affecting the reaction efficiency.

[0016] (2) In the present invention, the elastic telescopic rod rotates and the slider rotates, which in turn drives the elastic telescopic block to rotate, which in turn drives the scraper to rotate. The bottom of the mixing tank is scraped by the rotation of the scraper to prevent the generated polymer from adhering to the bottom, which causes the shear mixer to be unable to effectively crush the polymer, thus affecting the mixing efficiency. At the same time, the pulley frame squeezes the semicircular block to move downward, and the downward movement of the semicircular block drives the scraper to move downward. During the scraping process, the up and down reciprocating motion of the scraper will shake off the attached polymer, thus preventing the polymer from adhering to the scraper and affecting the scraping effect of the scraper.

[0017] (3) In this invention, the rotation of the scraper plate will drive the push plate to rotate, and the rotation of the push plate will push the precipitated polymer to the middle of the filter plate, so that the shear agitator can effectively crush the polymer, thereby improving the overall crushing effect. At the same time, the upward movement of the fixed plate will drive the filter plate to move upward, and the upward movement of the filter plate will make the polymer accumulated on the filter plate closer to the shear agitator, so that the shear agitator and the polymer are closer, thereby improving the crushing effect. At the same time, when the scraper plate drives the push plate to reset, the push plate will push the rotating plate to rotate upward, thereby preventing the rotating plate from continuously sliding upward during the reset process of the push plate. The reset force of the push plate cannot push the rotating plate to slide upward, thereby affecting the normal use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the stirring tank of the present invention; Figure 4 It is a schematic diagram of the structure of the mixing device of the present invention; Figure 5 It is a schematic structural diagram of the anti-adhesion device of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the structure enlargement of part A; Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure of part B.

[0019] In the figure: 1, stirring tank; 2, butyraldehyde pump; 3, hydrochloric acid pump; 4, auxiliary agent pump; 5, motor; 6, static mixing equipment; 7, temperature detector; 8, temperature regulating device; 9, conductivity meter; 10, electric telescopic rod; 11, storage rack; 12, reciprocating screw rod; 13, shear mixer; 14, L-shaped rod; 15, threaded block; 16, U-shaped rack; 17, rack; 18, gear; 19, rotating rod; 20, flip plate; 211, spiral drum; 212, connecting rod; 213, elastic telescopic rod; 214, slide rail; 215, slider; 216, elastic telescopic block; 217, scraper; 218, semicircular block; 219, pulley frame; 221, push plate; 222, sliding ring; 223, filter plate; 224, fixed plate; 225, rotating rod; 226, rotating plate; 227, limit block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 4, one embodiment of the present invention is: an experimental device for improving the uniformity of PVB synthesis based on a static mixer, comprising: a stirring tank 1, a butyraldehyde pump 2 is fixedly installed on the top of the stirring tank 1, a hydrochloric acid pump 3 is fixedly installed on the top of the stirring tank 1, an auxiliary agent pump 4 is fixedly installed on the top of the stirring tank 1, a mixing device, the mixing device is arranged inside the stirring tank 1, the stirring device comprises a motor 5, a static mixing device 6, a temperature detector 7, a temperature regulating device 8, a conductivity meter 9, an electric telescopic rod 10, a storage rack 11, a reciprocating screw rod 12, a shearing stirrer 13, an L-shaped rod 14, a threaded block 15, a U-shaped rack 16, a rack 17, a gear 18, a rotating rod 19 and a flip plate 20. When the reaction is too intense, the electric telescopic rod 10 will drive the storage rack 11 to move upward, so that the solid acid is separated from the solution to prevent the polymerization speed from being too fast, which poses a safety hazard. The motor 5 is fixedly installed on the top of the stirring tank 1, and the static mixing device 6 is fixedly installed at the output end of the motor 5. 500 static Static mixer, temperature detector 7 is fixedly mounted on the top of stirring tank 1, temperature regulating device 8 is fixedly mounted on the surface of stirring tank 1, conductivity meter 9 is fixedly mounted on the surface of stirring tank 1, electric telescopic rod 10 is fixedly mounted on the top of inner wall of stirring tank 1, storage rack 11 is fixedly mounted on the output end of electric telescopic rod 10, reciprocating screw rod 12 is fixedly mounted on the bottom of static mixing device 6, shearing agitator 13 is fixedly mounted on the bottom of reciprocating screw rod 12, L-shaped rod 14 is fixedly mounted on the inner wall of stirring tank 1, threaded block 15 is threadedly mounted on the surface of reciprocating screw rod 12, U-shaped frame 16 is fixedly mounted on the surface of L-shaped rod 14, rack 17 is fixedly mounted on the surface of threaded block 15, gear 18 is rotatably mounted on the surface of threaded block 15, rack 17 and gear 18 are meshed, rotating rod 19 is fixedly mounted on the surface of gear 18, flip plate 20 is fixedly mounted on the circumferential surface of rotating rod 19, and the rotation of flip plate 20 will push the solution precipitated at the bottom upward to prevent the solution from precipitating at the bottom, resulting in reduced synthesis uniformity and affecting reaction efficiency.

[0022] The L-shaped rod 14 penetrates through the surface of the threaded block 15. Solid acid is arranged inside the storage rack 11, and polymer is generated through the reaction of the solid acid.

[0023] A method for using an experimental device for improving PVB synthesis uniformity based on a static mixer comprises the following steps: Step 1: First, hydrochloric acid is pumped into the stirring tank 1 to be mixed with butyraldehyde, and then the raw materials in the stirring tank 1 are mixed with a static mixing device 6 to improve the stirring and mixing effect of the raw materials; Step 2: Cooperate with the temperature regulating device 8 to adjust to the appropriate temperature required for each reaction stage, and control the conductivity and pH value during the reaction process through the hydrochloric acid pump 3 and the auxiliary pump 4. The conductivity and pH value are displayed on the conductivity meter 9. The reaction progress derived from the conductivity is as follows: kt=b(G0-Gt) / cb[(G0-G∞)-(G0-Gt)]= (G0-Gt) / c(G0-G∞); Step 3: The electric telescopic rod 10 moves downward to drive the storage rack 11 to move downward. The storage rack 11 moves downward to catalyze the solution inside, catalyzing a polymerization reaction to produce a polymer. When the reaction is too intense, the electric telescopic rod 10 drives the storage rack 11 to move upward, and the solid acid is separated from the solution to prevent the polymerization speed from being too fast, which poses a safety hazard. Step 4: The static mixing device 6 rotates to drive the reciprocating screw 12 to rotate, and the reciprocating screw 12 rotates to drive the shearing agitator 13 to rotate, and the shearing agitator 13 rotates to crush the generated polymer. When the polymerization speed is too slow, the electric telescopic rod 10 is restarted to drive the solid acid to move downward for reaction; Step 5: The reciprocating screw 12 rotates to drive the threaded block 15 to reciprocate up and down, and the up and down reciprocating movement of the threaded block 15 drives the gear 18 to reciprocate up and down. The gear 18 contacts the rack 17 during the up and down reciprocating movement, and the rack 17 drives the gear 18 to rotate during the up and down movement. The rotation of the gear 18 drives the rotating rod 19 to rotate, and the rotation of the rotating rod 19 drives the flip plate 20 to rotate. The rotation of the flip plate 20 pushes the solution precipitated at the bottom upward to prevent the solution from precipitating at the bottom, resulting in reduced synthesis uniformity and affecting the reaction efficiency.

[0024] When the present embodiment is working, hydrochloric acid is first pumped into the stirring tank 1 to fuse with butyraldehyde, and then the static mixing device 6 is used to mix the raw materials inside the stirring tank 1 to improve the stirring and mixing effect of the raw materials, and the temperature regulating device 8 is used to adjust to the appropriate temperature required for each reaction stage, and the conductivity and pH value in the reaction process are controlled by the hydrochloric acid pump 3 and the auxiliary agent pump 4. The conductivity and pH value will be displayed on the conductivity meter 9, and at the same time, the electric telescopic rod 10 is started to move downward, and the electric telescopic rod 10 moving downward will drive the storage rack 11 to move downward. The solid acid catalyzes the solution inside when the storage rack 11 moves downward, and the catalysis will produce a polymerization reaction to produce a polymer. When the reaction is too intense, the electric telescopic rod 10 will drive the storage rack 11 to move upward to separate the solid acid from the solution to prevent the polymerization speed from being too fast, which poses a safety hazard. At the same time, the static The rotation of the mixing device 6 will drive the reciprocating screw 12 to rotate, and the rotation of the reciprocating screw 12 will drive the shearing agitator 13 to rotate. The rotation of the shearing agitator 13 will crush the generated polymer. When the polymerization speed is too slow, the electric telescopic rod 10 is restarted to drive the solid acid to move downward for reaction. At the same time, the rotation of the reciprocating screw 12 will drive the threaded block 15 to reciprocate up and down, and the up and down reciprocating movement of the threaded block 15 will drive the gear 18 to reciprocate up and down. The gear 18 will contact the rack 17 during the up and down reciprocating movement, and the rack 17 will cause the gear 18 to rotate during the up and down movement. The rotation of the gear 18 will drive the rotating rod 19 to rotate, and the rotation of the rotating rod 19 will drive the flip plate 20 to rotate. The rotation of the flip plate 20 will push the solution precipitated at the bottom upward to prevent the solution from precipitating at the bottom, resulting in reduced synthesis uniformity and affecting the reaction efficiency.

[0025] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, an anti-adhesion device is provided on the reciprocating screw 12 to prevent the polymer from being adhered, and a crushing device is provided on the anti-adhesion device. The anti-adhesion device includes a spiral barrel 211, a connecting rod 212, an elastic telescopic rod 213, a slide rail 214, a slider 215, an elastic telescopic block 216 and a scraper 217. A spiral groove is provided on the surface of the L-shaped rod 14, the spiral barrel 211 is threadedly installed on the surface of the L-shaped rod 14, the connecting rod 212 is fixedly installed on the surface of the spiral barrel 211, and the elastic telescopic rod 213 is fixedly installed. Installed at the bottom of the connecting rod 212, the slide rail 214 is fixedly installed on the inner wall of the mixing tank 1, one end of the slider 215 is fixedly installed on the free end of the elastic telescopic rod 213, and the other end of the slider 215 is slidably installed on the inner wall of the slide rail 214, the elastic telescopic block 216 is fixedly installed at the bottom of the slider 215, and the scraper 217 is fixedly installed at the bottom of the elastic telescopic block 216. The scraper 217 is rotated to scrape the bottom of the mixing tank 1 to prevent the generated polymer from adhering to the bottom, resulting in the shear agitator 13 being unable to effectively crush the polymer, affecting the mixing efficiency.

[0026] A semicircular block 218 is fixedly installed on the top of the scraper 217 , and a pulley frame 219 is fixedly installed on the bottom of the slide rail 214 to prevent the polymer from adhering to the scraper 217 and affecting the scraping effect of the scraper 217 .

[0027] The threaded block 15 is arranged below the spiral cylinder 211, the semicircular block 218 is arranged below the pulley frame 219, and a return spring is arranged between the slider 215 and the slide rail 214, and the slider 215 is driven to return to its original position by the return spring.

[0028] The crushing device includes a push plate 221, a sliding ring 222 and a filter plate 223. The push plate 221 is fixedly mounted on the surface of the scraper 217. A slide groove is provided at the bottom of the stirring tank 1. The sliding ring 222 is slidably mounted on the inner wall of the slide groove. The filter plate 223 is fixedly mounted on the top of the sliding ring 222, so that the shear agitator 13 can effectively crush the polymer and improve the overall crushing effect.

[0029] A fixed plate 224 is fixedly installed on the top of the filter plate 223, a rotating rod 225 is rotatably installed on the surface of the fixed plate 224, a rotating plate 226 is fixedly installed on the surface of the rotating rod 225, and a limiting block 227 is fixedly installed on the surface of the fixed plate 224, so that the shear mixer 13 is closer to the polymer and the crushing effect is improved.

[0030] A No. 1 spring is arranged between the sliding ring 222 and the sliding groove, and the sliding ring 222 is reset by the No. 1 spring. A No. 1 torsion spring is arranged between the rotating rod 225 and the fixed plate 224, and the rotating rod 225 is reset by the No. 1 torsion spring. The rotating plate 226 is in contact with the surface of the limit block 227.

[0031] When the present embodiment is working, when the screw block 15 moves upward, it will push the spiral barrel 211 to move upward. The spiral barrel 211 moves upward and rotates under the guidance of the spiral groove. The rotation of the spiral barrel 211 drives the connecting rod 212 to rotate. The rotation of the connecting rod 212 drives the elastic telescopic rod 213 to rotate. The elastic telescopic rod 213 rotates the slider 215. The rotation of the slider 215 drives the elastic telescopic block 216 to rotate. The rotation of the elastic telescopic block 216 drives the scraper 217 to rotate. The scraper 217 rotates to scrape the bottom of the stirring tank 1 to prevent the generated polymer from adhering to the bottom, causing shear stirring. The mixer 13 cannot effectively crush the polymer, which affects the mixing efficiency. At the same time, the rotation of the scraper 217 will drive the semicircular block 218 to rotate, and the rotation of the semicircular block 218 will contact the pulley frame 219. The pulley frame 219 will squeeze the semicircular block 218 to move downward. The downward movement of the semicircular block 218 will drive the scraper 217 to move downward. The up and down reciprocating motion of the scraper 217 during the scraping process will shake off the attached polymer, preventing the polymer from adhering to the scraper 217 and affecting the scraping effect of the scraper 217.

[0032] The rotation of the scraper 217 drives the push plate 221 to rotate. The rotation of the push plate 221 pushes the precipitated polymer to the middle of the filter plate 223, so that the shear mixer 13 can effectively crush the polymer and improve the overall crushing effect. At the same time, the push plate 221 will contact the rotating plate 226 during the rotation. The rotating plate 226 is limited by the limit block 227, so that the push plate 221 pushes the rotating plate 226 to slide upward during the rotation. The upward sliding of the rotating plate 226 drives the fixed plate 224 to move upward. The fixed plate 224 moves upward. It will drive the filter plate 223 to move upward. The upward movement of the filter plate 223 will make the polymer accumulated on the filter plate 223 closer to the shear agitator 13, so that the shear agitator 13 is closer to the polymer, thereby improving the crushing effect. At the same time, when the scraper 217 drives the push plate 221 to reset, the push plate 221 will push the rotating plate 226 to rotate upward, preventing the push plate 221 from continuously pushing the rotating plate 226 to slide upward during the reset process. The reset force of the push plate 221 cannot push the rotating plate 226 to slide upward, thereby affecting the normal use of the equipment.

[0033] 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 experimental device for improving the uniformity of PVB synthesis based on a static mixer, characterized in that: include: A stirring tank (1), wherein a butyraldehyde pump (2) is fixedly installed on the top of the stirring tank (1), a hydrochloric acid pump (3) is fixedly installed on the top of the stirring tank (1), and an auxiliary agent pump (4) is fixedly installed on the top of the stirring tank (1); A mixing device, the mixing device being arranged inside a stirring tank (1), the stirring device comprising a motor (5), a static mixing device (6), a temperature detector (7), a temperature regulating device (8), a conductivity meter (9), an electric telescopic rod (10), a storage rack (11), a reciprocating screw rod (12), a shearing stirrer (13), an L-shaped rod (14), a threaded block (15), a U-shaped rack (16), a rack (17), a gear (18), a rotating rod (19) and a flip plate (20), the motor (5) being fixedly mounted on the top of the stirring tank (1), the static mixing device (6) being fixedly mounted on the output end of the motor (5), the temperature detector (7) being fixedly mounted on the top of the stirring tank (1), the temperature regulating device (8) being fixedly mounted on the surface of the stirring tank (1), the conductivity meter (9) being fixedly mounted on the surface of the stirring tank (1), the ... the reciprocating screw rod (12), the shearing stirrer (13), the L-shaped rod (14), the threaded block (15), the U-shaped rack (16), the rack (17), the gear (18), the rotating rod (19) The retractable rod (10) is fixedly mounted on the top of the inner wall of the stirring tank (1), the storage rack (11) is fixedly mounted on the output end of the electric telescopic rod (10), the reciprocating screw rod (12) is fixedly mounted on the bottom of the static mixing device (6), the shearing agitator (13) is fixedly mounted on the bottom of the reciprocating screw rod (12), the L-shaped rod (14) is fixedly mounted on the inner wall of the stirring tank (1), the threaded block (15) is threadedly mounted on the surface of the reciprocating screw rod (12), the U-shaped rack (16) is fixedly mounted on the surface of the L-shaped rod (14), the rack (17) is fixedly mounted on the surface of the threaded block (15), the gear (18) is rotatably mounted on the surface of the threaded block (15), the rack (17) and the gear (18) are meshed with each other, the rotating rod (19) is fixedly mounted on the surface of the gear (18), and the flip plate (20) is fixedly mounted on the circumferential surface of the rotating rod (19); Wherein, the reciprocating screw (12) is provided with an anti-adhesion device for preventing polymer from adhering, and the anti-adhesion device is provided with a crushing device.

2. The experimental device for improving the uniformity of PVB synthesis based on a static mixer according to claim 1, characterized in that: The L-shaped rod (14) penetrates the surface of the threaded block (15), and solid acid is arranged inside the storage rack (11).

3. The experimental device for improving the uniformity of PVB synthesis based on a static mixer according to claim 2, characterized in that: The anti-adhesion device comprises a spiral cylinder (211), a connecting rod (212), an elastic telescopic rod (213), a slide rail (214), a slider (215), an elastic telescopic block (216) and a scraper (217); a spiral groove is provided on the surface of the L-shaped rod (14); the spiral cylinder (211) is threadedly mounted on the surface of the L-shaped rod (14); the connecting rod (212) is fixedly mounted on the surface of the spiral cylinder (211); the elastic telescopic rod (213) is fixedly mounted on the bottom of the connecting rod (212); the slide rail (214) is fixedly mounted on the inner wall of the stirring tank (1); one end of the slider (215) is fixedly mounted on the free end of the elastic telescopic rod (213); the other end of the slider (215) is slidably mounted on the inner wall of the slide rail (214); the elastic telescopic block (216) is fixedly mounted on the bottom of the slider (215); and the scraper (217) is fixedly mounted on the bottom of the elastic telescopic block (216).

4. The experimental device for improving the uniformity of PVB synthesis based on a static mixer according to claim 3, characterized in that: A semicircular block (218) is fixedly mounted on the top of the scraper (217), and a pulley frame (219) is fixedly mounted on the bottom of the slide rail (214).

5. The experimental device for improving the uniformity of PVB synthesis based on a static mixer according to claim 4, characterized in that: The threaded block (15) is arranged below the spiral cylinder (211), the semicircular block (218) is arranged below the pulley frame (219), and a return spring is arranged between the slider (215) and the slide rail (214).

6. The experimental device for improving the uniformity of PVB synthesis based on a static mixer according to claim 5, characterized in that: The pulverizing device comprises a push plate (221), a sliding ring (222) and a filter plate (223); the push plate (221) is fixedly mounted on the surface of the scraper (217); a slide groove is provided at the bottom of the stirring tank (1); the sliding ring (222) is slidably mounted on the inner wall of the slide groove; and the filter plate (223) is fixedly mounted on the top of the sliding ring (222).

7. The experimental device for improving the uniformity of PVB synthesis based on a static mixer according to claim 6, characterized in that: A fixing plate (224) is fixedly mounted on the top of the filter plate (223); a rotating rod (225) is rotatably mounted on the surface of the fixing plate (224); a rotating plate (226) is fixedly mounted on the surface of the rotating rod (225); and a limiting block (227) is fixedly mounted on the surface of the fixing plate (224).

8. The experimental device for improving the uniformity of PVB synthesis based on a static mixer according to claim 7, characterized in that: A first spring is provided between the sliding ring (222) and the sliding groove, a first torsion spring is provided between the rotating rod (225) and the fixed plate (224), and the rotating plate (226) is in surface contact with the limiting block (227).

9. A method for using an experimental device for improving the uniformity of PVB synthesis based on a static mixer, using the experimental device for improving the uniformity of PVB synthesis based on a static mixer according to claim 8, characterized in that: The following steps are involved: Step 1: firstly, hydrochloric acid is pumped into the stirring tank (1) to be mixed with butyraldehyde, and then the raw materials in the stirring tank (1) are mixed using a static mixing device (6) to improve the stirring and mixing effect of the raw materials; Step 2: Use the temperature regulating device (8) to adjust the temperature to the appropriate temperature required for each reaction stage, and use the hydrochloric acid pump (3) and the auxiliary agent pump (4) to control the conductivity and pH value during the reaction. The conductivity and pH value are displayed on the conductivity meter (9). The reaction progress deduced from the conductivity is as follows: kt=b(G0-Gt) / cb[(G0-G∞)-(G0-Gt)]= (G0-Gt) / c(G0-G∞); Step 3: The electric telescopic rod (10) moves downward, driving the storage rack (11) to move downward. The storage rack (11) moves downward, and the solid acid catalyzes the solution inside, catalyzing a polymerization reaction to produce a polymer. When the reaction is too intense, the electric telescopic rod (10) drives the storage rack (11) to move upward, and the solid acid is separated from the solution to prevent the polymerization speed from being too fast, which poses a safety hazard. Step 4: The static mixing device (6) rotates to drive the reciprocating screw (12) to rotate, and the reciprocating screw (12) rotates to drive the shearing agitator (13) to rotate, and the shearing agitator (13) rotates to crush the generated polymer. When the polymerization speed is too slow, the electric telescopic rod (10) is restarted to drive the solid acid to move downward for reaction; Step 5: The reciprocating screw (12) rotates to drive the threaded block (15) to reciprocate up and down. The threaded block (15) reciprocates up and down to drive the gear (18) to reciprocate up and down. The gear (18) contacts the rack (17) during the reciprocating up and down movement. The rack (17) drives the gear (18) to rotate during the up and down movement. The rotation of the gear (18) drives the rotating rod (19) to rotate. The rotation of the rotating rod (19) drives the flip plate (20) to rotate. The rotation of the flip plate (20) pushes the solution precipitated at the bottom upward to prevent the solution from precipitating at the bottom, resulting in reduced synthesis uniformity and affecting the reaction efficiency.

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