An efficient and environmentally friendly polymerization device for producing styrene-butadiene latex

Abstract

The present invention discloses an efficient and environmentally friendly polymerization device for producing styrene-butadiene latex, belonging to the technical field of styrene-butadiene latex production equipment. The efficient and environmentally friendly polymerization device for producing styrene-butadiene latex includes a chassis, the top of the chassis is fixedly connected with a support frame, and a polymerization tank is fixedly installed at the center of the top of the chassis; a stirring mechanism is installed at the center of the polymerization tank, a dispersion mechanism is installed on the stirring mechanism, and a material taking mechanism is installed at the rear end of the outer wall of the polymerization tank. By designing the polymerization tank, the stirring mechanism and the cooling and heating exchanger, when stirring the raw materials, heating and cooling can be carried out at any time according to the specific stirring process to improve the stability of styrene-butadiene latex polymerization, prevent the phenomena of violent polymerization and gelation caused by too high or too low temperature, and always maintain the stability of styrene-butadiene latex polymerization.

Description

Technical Field

[0001] The present invention belongs to the technical field of styrene-butadiene latex production equipment, and particularly relates to an efficient and environmentally friendly polymerization device for producing styrene-butadiene latex. Background Art

[0002] Styrene-butadiene latex is a polymer aqueous dispersion system made by emulsion polymerization of styrene and butadiene. Its microscopic structure is that styrene-butadiene copolymer particles are stably dispersed in the water phase, and it appears as a milky white liquid, which is widely used in papermaking, coatings, textiles, medical and other fields; its production process mainly includes three stages: raw material preparation, polymerization reaction, and post-treatment. The core goal is to achieve a latex product with high conversion rate, low residual monomer, and good stability; the tail gas generated during the efficient and environmentally friendly polymerization of styrene-butadiene latex can be recycled. First, styrene is recovered through primary condensation (temperature 0–10°C), and then butadiene is recovered through secondary condensation (temperature -20 to -30°C) to achieve efficient resource utilization.

[0003] In the existing process of producing styrene-butadiene latex, styrene and butadiene raw materials are usually directly put into a polymerization tank and stirred by a stirring mechanism to achieve polymerization. However, the existing devices cannot accurately control the polymerization temperature. Too high or too low temperature will cause large particles to form in the styrene-butadiene latex, affecting the rheology and film-forming properties of the latex; and the existing polymerization devices have poor functionality and cannot recycle the tail gas generated during the production of styrene-butadiene latex, resulting in high production costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide an efficient and environmentally friendly polymerization device for producing styrene-butadiene latex.

[0005] The technical solution adopted to solve the above technical problem is: an efficient and environmentally friendly polymerization device for producing styrene-butadiene latex, including a chassis, the top of the chassis is fixedly connected with a support frame, and a polymerization tank is fixedly installed at the center of the top of the chassis;

[0006] A stirring mechanism is installed at the center of the polymerization tank, a dispersion mechanism is installed on the stirring mechanism, and a material taking mechanism is installed at the rear end of the outer wall of the polymerization tank;

[0007] A first raw material tank and a second raw material tank are respectively fixedly installed on both sides of the top of the chassis close to the polymerization tank, a heat exchanger is fixedly installed at the rear end of the top of the support frame, and a recycling mechanism is fixedly installed at the center of the top of the support frame.

[0008] Further, a discharge pipe is fixedly connected to the center of the bottom of the polymerization tank, a base is fixedly connected to the center of the inner surface of the bottom of the polymerization tank, an annular groove is formed in the inner surface of the top of the polymerization tank, feed sleeves are fixedly connected to both sides of the top of the polymerization tank, first springs are installed in both of the feed sleeves, and spheres are fixedly connected to the bottom ends of both of the first springs.

[0009] Through the above technical solution, when the raw materials in the first raw material tank and the second raw material tank are added into the polymerization tank for stirring, the movable plate rotates and touches the two spheres, causing the two spheres to be squeezed upward, thereby squeezing the corresponding first springs, and thus sticking to the through holes of the corresponding feed sleeves. Whenever the movable plate rotates one circle, the two feed sleeves are blocked once, so as to realize intermittent feeding, prevent a large amount of raw materials from being added at one time, which may cause violent heat release, and further prevent the occurrence of gelation. Moreover, intermittent feeding improves the stability of styrene-butadiene latex polymerization. By changing the rotation speed of the movable plate, the feeding rate of the two feed sleeves can be adjusted.

[0010] Further, the stirring mechanism includes a stirring pipe rotatably connected between the top and the base of the polymerization tank, a sealing disc is rotatably connected to the top end of the stirring pipe, two fixed pipes are fixedly connected to both sides of the outer wall of the stirring pipe, a scraping bar is fixedly connected between one ends of the two fixed pipes, a plurality of stirring plates are fixedly connected to the inner ends of the outer walls of the two scraping bars, and the inner cavities between the plurality of fixed pipes and the corresponding scraping bars and the corresponding stirring plates are communicated with each other.

[0011] Through the above technical solution, when stirring the raw materials in the polymerization tank, the stirring pipe rotates to drive the plurality of fixed pipes to rotate, thereby driving the two scraping bars to rotate, and further driving the corresponding plurality of stirring plates to rotate, so as to realize the stirring of the raw materials. While the two scraping bars rotate, they will scrape off the sticky materials attached to the inner wall of the polymerization tank, avoiding the concentration of reactants in the dead corner area and ensuring that the styrene-butadiene latex polymerization reaction is more uniform.

[0012] Further, the dispersion mechanism includes two movable plates fixedly connected to the outer wall of the stirring pipe, two rotating shafts are rotatably connected between the two movable plates, a plurality of dispersion serrated discs are fixedly connected to the outer walls of the two rotating shafts, first gears are fixedly connected to the top ends of the outer walls of the two rotating shafts, a toothed ring is fixedly installed in the annular groove, a second gear is fixedly connected to the top end of the outer wall of the stirring pipe, a frame is fixedly connected to the front end of the top of the polymerization tank, and a motor is fixedly installed on the top of the frame. A third gear is fixedly connected to the outer wall of the output shaft of the motor.

[0013] Through the above technical solution, start the motor. The rotation of the output shaft drives the rotation of the third gear, which in turn drives the rotation of the meshing second gear, thereby driving the rotation of the stirring tube, which drives the rotation of the two movable plates, which drives the revolution of the two rotating shafts, so that the corresponding first gears all roll meshingly on the toothed ring, driving the rotation of the two rotating shafts, and further driving the rotation of the corresponding plurality of dispersing sawtooth discs, thereby stirring the raw materials in the polymerization tank into a vortex shape, enhancing the collision frequency between materials, and cooperating with a plurality of stirring plates to achieve efficient mixing.

[0014] Further, both of the first gears mesh with the toothed ring, the third gear meshes with the second gear, and in the combined state, the movable plate contacts the two spheres.

[0015] Through the above technical solution, the rotation of the stirring tube drives the rotation of the two movable plates. The rotation of the movable plate at the top end inside the polymerization tank touches the two spheres, realizing intermittent feeding of the polymerization tank and improving the stability of styrene-butadiene latex polymerization.

[0016] Further, the material taking mechanism includes a connecting sleeve fixedly connected to the rear end of the outer wall of the polymerization tank. There is a discharge port at the bottom end of the outer wall of the connecting sleeve. A material taking plug is arranged inside the connecting sleeve. A material groove is arranged on the outer wall of the material taking plug. A pull rod is fixedly connected to the outer end of the material taking plug. A connecting plate is fixedly connected to the outer end of the connecting sleeve. The outer wall of the pull rod is rotatably connected to a fixing plate. A second spring is fixedly connected between the fixing plate and the connecting plate. Two limiting rods are fixedly connected to the inner end of the fixing plate.

[0017] Through the above technical solution, during the production of styrene-butadiene latex, when sampling and testing are required, the staff pushes the pull rod, thereby pushing the material taking plug, and then rotates the material taking plug to dig out the polymerized styrene-butadiene latex in the polymerization tank. Then rotate the pull rod so that the pointer points directly downward and aligns with the discharge port. When the material taking plug returns to the original position through the second spring, at this time the material groove just aligns with the discharge port, thereby pouring out the sample inside, so as to observe the real situation of the styrene-butadiene latex polymerization reaction, be able to timely discover possible problems in the reaction, and make adjustments to improve the final product quality.

[0018] Further, the pull rod is slidably connected to the connecting sleeve. A pointer is arranged on the pull rod. The pointer aligns with the material groove. Both of the limiting rods penetrate through the connecting plate.

[0019] Through the above technical solution, setting the pointer facilitates the staff to quickly take materials, and the two limiting rods improve the stability of the material taking plug when taking materials.

[0020] Further, pump bodies are fixedly installed on both sides of the top of the support frame. First connecting pipes are fixedly connected between the two pump bodies and the first raw material tank and the second raw material tank respectively. Second connecting pipes are fixedly connected between the two pump bodies and the corresponding feeding sleeves respectively.

[0021] Through the above technical solution, when feeding the polymerization tank, start the two pump bodies, extract the raw materials stored in the first raw material tank and the second raw material tank through the two first connecting pipes respectively, and then transport them to the corresponding feeding sleeves through the two second connecting pipes, so as to feed the polymerization tank. The first raw material tank can store styrene, and the second raw material tank can store butadiene.

[0022] Further, a third connecting pipe and a fourth connecting pipe are fixedly connected between the heat exchange cooler and the sealing plate.

[0023] Through the above technical solution, when carrying out polymerization stirring on the polymerization tank, in the initial stage of the reaction, heating is required. Start the heat exchange cooler and transport hot water at 50-70 °C to the stirring pipe through the third connecting pipe. Since the stirring pipe is connected to multiple fixed pipes, two scraping bars and multiple stirring plates, the transported hot water can fill the entire connected cavity, so that it can contact the raw materials in a large area, greatly improving the polymerization reaction speed. In the later stage of the reaction, cooling is required. At this time, extract the hot water inside through the heat exchange cooler and the fourth connecting pipe, and then transport warm water below 40 °C through the third connecting pipe to prevent excessive polymerization or side reactions and maintain the stability of styrene-butadiene latex.

[0024] Further, the recycling mechanism includes a treatment tank fixedly connected to the center of the top of the support frame. The center of the inner surface of the bottom of the treatment tank is fixedly connected with a first air inlet pipe. A first mounting plate is fixedly connected inside the treatment tank. A plurality of first condenser pipes are fixedly installed at the bottom of the first mounting plate. A partition plate is fixedly connected above the first mounting plate inside the treatment tank. The center of the top of the partition plate is fixedly connected with a second air inlet pipe. A second mounting plate is fixedly connected above the partition plate inside the treatment tank. A plurality of second condenser pipes are fixedly installed at the bottom of the second mounting plate. Umbrella caps are fixedly connected to the tops of the first air inlet pipe and the second air inlet pipe. A filter pipe is fixedly connected to the center of the top of the treatment tank. A fifth connecting pipe and a sixth connecting pipe are fixedly connected between the treatment tank and the first raw material tank and the second raw material tank respectively. One end of the fifth connecting pipe is located below the plurality of first condenser pipes. One end of the sixth connecting pipe is located below the plurality of second condenser pipes. A seventh connecting pipe is fixedly connected between the first air inlet pipe and the polymerization tank.

[0025] Through the above technical solution, the tail gas generated by the polymerization reaction in the polymerization tank is transported to the treatment tank through the seventh connecting pipe and the first intake pipe. First, it contacts with multiple first condenser pipes. The multiple first condenser pipes perform a preliminary condensation of the tail gas at 0-10°C, thereby liquefying the gaseous styrene in the tail gas. The liquefied styrene drips onto the bottom inside the treatment tank in the form of water droplets. When a certain amount accumulates, it is transported to the first raw material tank for storage through the fifth connecting pipe. The preliminarily treated tail gas is discharged upward through the second intake pipe and contacts with multiple second condenser pipes. The multiple second condenser pipes perform a condensation of the tail gas at -20°C, thereby liquefying the gaseous butadiene in the tail gas. The liquefied butadiene drips onto the partition plate inside the treatment tank in the form of water droplets. When a certain amount accumulates, it is transported to the second raw material tank for storage through the sixth connecting pipe. The remaining tail gas is filtered and discharged through the filter pipe, realizing resource recycling and utilization, greatly reducing the production cost. At the same time, the two umbrella caps prevent the liquid from dripping into the first intake pipe and the second intake pipe.

[0026] The beneficial effects of the present invention are as follows: (1) By designing the polymerization tank, the stirring mechanism and the heat exchanger, when stirring the raw materials, heating and cooling can be carried out at any time according to the specific stirring process to improve the stability of the styrene-butadiene latex polymerization, prevent the phenomena of violent polymerization and gelation caused by too high or too low temperature, and always maintain the stability of the styrene-butadiene latex polymerization; (2) By designing the stirring mechanism and the dispersion mechanism, the raw materials are stirred into a vortex shape by multiple dispersion serrated disks to enhance the collision frequency between the materials. Cooperating with multiple stirring plates, efficient mixing is achieved, and the scraping bar will be driven to scrape off the sticky materials attached to the inner wall of the polymerization tank, avoiding the concentration of reactants in the dead corner area, ensuring that the styrene-butadiene latex polymerization reaction is more uniform. At the same time, during the rotation of the stirring mechanism, two spheres will be touched to achieve intermittent feeding of the raw materials, preventing a large amount of raw materials from being added at one time and causing violent heat release, and further preventing the occurrence of gelation; (3) By designing the recycling mechanism, the tail gas can be preliminarily condensed to recover the styrene in the tail gas and realize liquid storage, and then further condensed to recover the butadiene in the tail gas and realize liquid storage, thereby greatly reducing the production cost. Description of the Drawings

[0027] Figure 1 is the overall external view of the first perspective of the present invention;

[0028] Figure 2 is the overall external view of the second perspective of the present invention;

[0029] Figure 3 is the overall front view of the present invention;

[0030] Figure 4 is the overall sectional view of the present invention;

[0031] Figure 5It is a schematic structural diagram of the cold and heat exchanger of the present invention;

[0032] Figure 6 It is a sectional view of the first perspective polymerization tank and stirring mechanism of the present invention;

[0033] Figure 7 It is a sectional view of the second perspective polymerization tank and stirring mechanism of the present invention;

[0034] Figure 8 It is a schematic structural diagram of the stirring mechanism and dispersion mechanism of the present invention;

[0035] Figure 9 It is a sectional view of the recycling mechanism of the present invention;

[0036] Figure 10 It is Figure 6 a partial enlarged view of part A in

[0037] Figure 11 It is Figure 6 a partial enlarged view of part B in

[0038] Figure 12 It is Figure 7 a partial enlarged view of part C in

[0039] Reference numerals: 1, chassis; 2, support frame; 3, polymerization tank; 31, feed pipe; 32, base; 33, annular groove; 34, feed sleeve; 35, first spring; 36, sphere; 4, stirring mechanism; 401, stirring pipe; 402, sealing disc; 403, fixed pipe; 404, scraping bar; 405, stirring plate; 5, dispersion mechanism; 501, movable plate; 502, rotating shaft; 503, dispersion serrated disc; 504, first gear; 505, gear ring; 506, second gear; 507, frame; 508, motor; 509, third gear; 6, material taking mechanism; 601, connecting sleeve; 602, discharge port; 603, material taking plug; 604, material tank; 605, pull rod; 6051, pointer; 606, connecting plate; 607, fixing plate; 608, second spring; 609, limiting rod; 7, first raw material tank; 71, pump body; 72, first connecting pipe; 73, second connecting pipe; 8, second raw material tank; 9, cold and heat exchanger; 91, third connecting pipe; 92, fourth connecting pipe; 10, recycling mechanism; 1001, treatment tank; 1002, first intake pipe; 1003, first mounting plate; 1004, first condenser pipe; 1005, partition plate; 1006, second intake pipe; 1007, second mounting plate; 1008, second condenser pipe; 1009, umbrella cover; 1010, filter pipe; 1011, fifth connecting pipe; 1012, sixth connecting pipe; 1013, seventh connecting pipe. Detailed implementation manners

[0040] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] As Figures 1-8 shown, a high-efficiency and environmentally friendly polymerization device for producing styrene-butadiene latex in this embodiment includes a chassis 1. A support frame 2 is fixedly connected to the top of the chassis 1. A polymerization tank 3 is fixedly installed at the center of the top of the chassis 1. A feeding pipe 31 is fixedly connected to the center of the bottom of the polymerization tank 3. A base 32 is fixedly connected to the center of the inner surface of the bottom of the polymerization tank 3. An annular groove 33 is formed in the inner surface of the top of the polymerization tank 3. Feeding sleeves 34 are fixedly connected to both sides of the top of the polymerization tank 3. First springs 35 are installed in both feeding sleeves 34. Balls 36 are fixedly connected to the bottom ends of the two first springs 35. When the raw materials in the first raw material tank 7 and the second raw material tank 8 are added into the polymerization tank 3 for stirring, the rotation of the movable plate 501 will touch the two balls 36, so that the two balls 36 are squeezed upward, thereby squeezing the corresponding first springs 35, and thus tightly adhering to the through holes of the corresponding feeding sleeves 34. Whenever the movable plate 501 rotates one circle, the two feeding sleeves 34 are blocked once, so as to realize intermittent feeding, prevent a large amount of raw materials from being added at one time, which may cause violent heat release, and further prevent the occurrence of gelation phenomenon. And intermittent feeding improves the stability of styrene-butadiene latex polymerization. By changing the rotation speed of the movable plate 501, the feeding rate of the two feeding sleeves 34 can be adjusted.

[0042] As Figures 1-11 shown, a stirring mechanism 4 is installed in the center of the polymerization tank 3. The stirring mechanism 4 includes a stirring pipe 401 rotatably connected between the top of the polymerization tank 3 and the base 32. A sealing disk 402 is rotatably connected to the top end of the stirring pipe 401. Two fixed pipes 403 are fixedly connected to both sides of the outer wall of the stirring pipe 401. A scraping bar 404 is fixedly connected between one ends of the two fixed pipes 403. A plurality of stirring plates 405 are fixedly connected to the inner ends of the outer walls of the two scraping bars 404. The inner cavities between the plurality of fixed pipes 403 and the corresponding scraping bars 404 and the corresponding stirring plates 405 are connected. When stirring the raw materials in the polymerization tank 3, the rotation of the stirring pipe 401 drives the plurality of fixed pipes 403 to rotate, thereby driving the two scraping bars 404 to rotate, and further driving the corresponding plurality of stirring plates 405 to rotate, so as to realize the stirring of the raw materials. While the two scraping bars 404 are rotating, they will scrape off the sticky materials attached to the inner wall of the polymerization tank 3, avoiding the concentration of reactants in the dead corner area and ensuring that the styrene-butadiene latex polymerization reaction is more uniform.

[0043] As Figures 1-10As shown in the figure, a dispersion mechanism 5 is installed on the stirring mechanism 4. The dispersion mechanism 5 includes two movable plates 501 fixedly connected to the outer wall of the stirring tube 401. Two rotating shafts 502 are rotatably connected between the two movable plates 501. A plurality of dispersion sawtooth discs 503 are fixedly connected to the outer walls of the two rotating shafts 502. First gears 504 are fixedly connected to the tops of the outer walls of the two rotating shafts 502. A gear ring 505 is fixedly installed in the annular groove 33. A second gear 506 is fixedly connected to the top of the outer wall of the stirring tube 401. A frame 507 is fixedly connected to the front end of the top of the polymerization tank 3. A motor 508 is fixedly installed on the top of the frame 507. A third gear 509 is fixedly connected to the outer wall of the output shaft of the motor 508. Start the motor 508, drive the third gear 509 to rotate through the rotation of the output shaft, thereby driving the engaged second gear 506 to rotate, thereby driving the stirring tube 401 to rotate, thereby driving the two movable plates 501 to rotate, thereby driving the two rotating shafts 502 to revolve, so that the corresponding first gears 504 all roll meshingly on the gear ring 505, thereby driving the two rotating shafts 502 to rotate self, and further driving the corresponding plurality of dispersion sawtooth discs 503 to rotate, thereby stirring the raw materials in the polymerization tank 3 into a vortex shape, enhancing the collision frequency between materials, and cooperating with a plurality of stirring plates 405 to achieve efficient mixing. The two first gears 504 are both meshed with the gear ring 505, and the third gear 509 is meshed with the second gear 506. In the combined state, the movable plate 501 contacts the two spheres 36. The rotation of the stirring tube 401 drives the two movable plates 501 to rotate. The rotation of the movable plate 501 at the inner top of the polymerization tank 3 will touch the two spheres 36, realizing intermittent feeding of the polymerization tank 3 and improving the stability of styrene-butadiene latex polymerization.

[0044] As Figures 1-12As shown in the figure, a sampling mechanism 6 is installed at the rear end of the outer wall of the polymerization tank 3. The sampling mechanism 6 includes a connecting sleeve 601 fixedly connected to the rear end of the outer wall of the polymerization tank 3. An outlet 602 is provided at the bottom end of the outer wall of the connecting sleeve 601. A sampling plug 603 is arranged inside the connecting sleeve 601. A material groove 604 is provided on the outer wall of the sampling plug 603. A pull rod 605 is fixedly connected to the outer end of the sampling plug 603. A connecting plate 606 is fixedly connected to the outer end of the connecting sleeve 601. A fixing plate 607 is rotatably connected to the outer wall of the pull rod 605. A second spring 608 is fixedly connected between the fixing plate 607 and the connecting plate 606. Two limiting rods 609 are fixedly connected to the inner end of the fixing plate 607. During the production of styrene-butadiene latex, when sampling and testing are required, the staff pushes the pull rod 605, thereby pushing the sampling plug 603, and then rotates the sampling plug 603 to dig out the styrene-butadiene latex polymerized in the polymerization tank 3. Then rotate the pull rod 605 to make the pointer 6051 face directly downward and align with the outlet 602. When the sampling plug 603 returns to the original position through the second spring 608, at this time the material groove 604 is exactly aligned with the outlet 602, so as to pour out the sample inside, so that the real situation of the styrene-butadiene latex polymerization reaction can be observed, problems that may exist in the reaction can be discovered in time, and adjustments can be made to improve the final product quality. The pull rod 605 is slidably connected to the connecting sleeve 601. A pointer 6051 is provided on the pull rod 605. The pointer 6051 is aligned with the material groove 604. Both of the two limiting rods 609 penetrate through the connecting plate 606. The setting of the pointer 6051 facilitates the staff to quickly take samples. The two limiting rods 609 improve the stability of the sampling plug 603 when taking samples.

[0045] As Figures 1-3 shown in the figure, a first raw material tank 7 and a second raw material tank 8 are respectively and fixedly installed on both sides of the top of the chassis 1 close to the polymerization tank 3. Pump bodies 71 are fixedly installed on both sides of the top of the support frame 2. First connecting pipes 72 are fixedly connected between the two pump bodies 71 and the first raw material tank 7 and the second raw material tank 8 respectively. Second connecting pipes 73 are fixedly connected between the two pump bodies 71 and the corresponding feed sleeves 34 respectively. When feeding the polymerization tank 3, start the two pump bodies 71, respectively extract the raw materials stored in the first raw material tank 7 and the second raw material tank 8 through the two first connecting pipes 72, and then transport them to the corresponding feed sleeves 34 through the two second connecting pipes 73, so as to feed the polymerization tank 3. And the first raw material tank 7 can store styrene, and the second raw material tank 8 can store butadiene.

[0046] As Figures 1-11As shown in the figure, a hot and cold exchanger 9 is fixedly installed at the rear end of the top of the support frame 2. A third connecting pipe 91 and a fourth connecting pipe 92 are fixedly connected between the hot and cold exchanger 9 and the sealing disc 402. When carrying out polymerization stirring on the polymerization tank 3, in the initial stage of the reaction, heating is required. Start the hot and cold exchanger 9 and convey hot water at 50 - 70 °C into the stirring pipe 401 through the third connecting pipe 91. Since the stirring pipe 401 is communicated with a plurality of fixed pipes 403, two scraping bars 404 and a plurality of stirring plates 405, the conveyed hot water can fill the entire communicated cavity, so that it can contact the raw materials in a large area, greatly improving the polymerization reaction speed. In the later stage of the reaction, cooling is required. At this time, the hot water inside is extracted through the hot and cold exchanger 9 and the fourth connecting pipe 92, and then warm water below 40 °C is conveyed through the third connecting pipe 91 to prevent excessive polymerization or side reactions and maintain the stability of styrene-butadiene latex.

[0047] As Figures 1-9As shown in the figure, a recycling mechanism 10 is fixedly installed at the center of the top of the support frame 2. The recycling mechanism 10 includes a processing tank 1001 fixedly connected to the center of the top of the support frame 2. The center of the inner surface of the bottom of the processing tank 1001 is fixedly connected with a first intake pipe 1002. A first mounting plate 1003 is fixedly connected inside the processing tank 1001. A plurality of first condenser pipes 1004 are fixedly installed at the bottom of the first mounting plate 1003. A partition plate 1005 is fixedly connected above the first mounting plate 1003 inside the processing tank 1001. The center of the top of the partition plate 1005 is fixedly connected with a second intake pipe 1006. A second mounting plate 1007 is fixedly connected above the partition plate 1005 inside the processing tank 1001. A plurality of second condenser pipes 1008 are fixedly installed at the bottom of the second mounting plate 1007. The tops of the first intake pipe 1002 and the second intake pipe 1006 are both fixedly connected with umbrella caps 1009. A filter pipe 1010 is fixedly connected to the center of the top of the processing tank 1001. A fifth connecting pipe 1011 and a sixth connecting pipe 1012 are fixedly connected between the processing tank 1001 and the first raw material tank 7 and the second raw material tank 8 respectively. One end of the fifth connecting pipe 1011 is located below the plurality of first condenser pipes 1004. One end of the sixth connecting pipe 1012 is located below the plurality of second condenser pipes 1008. A seventh connecting pipe 1013 is fixedly connected between the first intake pipe 1002 and the polymerization tank 3. The tail gas generated by the polymerization reaction in the polymerization tank 3 is transported into the processing tank 1001 through the seventh connecting pipe 1013 and the first intake pipe 1002. First, it contacts the plurality of first condenser pipes 1004. The plurality of first condenser pipes 1004 perform preliminary condensation of the tail gas at 0-10°C, thereby liquefying the gaseous styrene in the tail gas. The liquefied styrene drips onto the bottom inside the processing tank 1001 in the form of water droplets. When a certain amount accumulates, it is transported to the first raw material tank 7 for storage through the fifth connecting pipe 1011. The preliminarily treated tail gas is discharged upward through the second intake pipe 1006 and contacts the plurality of second condenser pipes 1008. The plurality of second condenser pipes 1008 perform condensation of the tail gas at -20°C, thereby liquefying the gaseous butadiene in the tail gas. The liquefied butadiene drips onto the partition plate 1005 inside the processing tank 1001 in the form of water droplets. When a certain amount accumulates, it is transported to the second raw material tank 8 for storage through the sixth connecting pipe 1012. The remaining tail gas is filtered and discharged through the filter pipe 1010, realizing resource recycling, greatly reducing the production cost. At the same time, the two umbrella caps 1009 prevent liquid from dripping into the first intake pipe 1002 and the second intake pipe 1006.

[0048] The working principle of this embodiment is as follows. When feeding the polymerization tank 3, start the two pump bodies 71, respectively extract the raw materials stored in the first raw material tank 7 and the second raw material tank 8 through the two first connecting pipes 72, and then transport them to the corresponding feeding sleeves 34 through the two second connecting pipes 73, thereby feeding the polymerization tank 3.

[0049] When stirring the raw materials in the polymerization tank 3, start the motor 508. The rotation of the output shaft drives the rotation of the third gear 509, which in turn drives the rotation of the meshing second gear 506, thereby driving the rotation of the stirring pipe 401. The rotation of the stirring pipe 401 drives the rotation of multiple fixed pipes 403, which in turn drives the rotation of two scraping bars 404, and further drives the rotation of the corresponding multiple stirring plates 405 to achieve the stirring of the raw materials. When the two scraping bars 404 rotate, they will scrape off the sticky materials attached to the inner wall of the polymerization tank 3, avoiding the concentration of reactants in the dead corner area and ensuring a more uniform polymerization reaction of styrene-butadiene latex. The rotation of the two movable plates 501 drives the revolution of the two rotating shafts 502, causing the corresponding first gears 504 to roll meshingly on the gear ring 505, thereby driving the rotation of the two rotating shafts 502, and further driving the rotation of the corresponding multiple dispersion serrated disks 503, thus stirring the raw materials in the polymerization tank 3 into a vortex shape, enhancing the collision frequency between materials, and cooperating with multiple stirring plates 405 to achieve efficient mixing. Moreover, the rotation of the movable plate 501 will touch the two spheres 36, causing the two spheres 36 to be squeezed upward, thereby squeezing the corresponding first spring 35 and tightly adhering to the through holes of the corresponding feeding sleeves 34. Every time the movable plate 501 rotates one circle, the two feeding sleeves 34 are blocked once, thereby realizing intermittent feeding, preventing a large amount of raw materials from being added at one time, which may cause intense heat release, and further preventing the occurrence of gelation;

[0050] In the initial stage of the reaction, heating is required. Start the heat exchanger 9 and convey hot water at 50 - 70 °C into the stirring pipe 401 through the third connecting pipe 91. Since the stirring pipe 401 is connected to multiple fixed pipes 403, two scraping bars 404 and multiple stirring plates 405, the conveyed hot water can fill the entire connected cavity, so that it can contact the raw materials over a large area and improve the polymerization reaction rate. In the middle stage of the reaction, when sampling and testing are required in the later stage of the reaction, the staff pushes the pull rod 605, thereby pushing the sampling plug 603, and then rotates the sampling plug 603 to dig out the polymerized styrene-butadiene latex in the polymerization tank 3. Then rotate the pull rod 605 to make the pointer 6051 point directly downward and align with the discharge port 602. When the sampling plug 603 returns to the original position through the second spring 608, the trough 604 is exactly aligned with the discharge port 602 at this time, so as to pour out the sample inside, so that the true situation of the styrene-butadiene latex polymerization reaction can be observed, possible problems in the reaction can be detected in time, and adjustments can be made to improve the final production quality of styrene-butadiene latex. In the later stage of the reaction, cooling is required. At this time, the hot water inside is pumped out through the heat exchanger 9 and the fourth connecting pipe 92, and warm water below 40 °C is conveyed through the third connecting pipe 91 to prevent excessive polymerization or side reactions and maintain the stability of styrene-butadiene latex. After the reaction is completed, the polymerized styrene-butadiene latex is discharged through the blanking pipe 31;

[0051] The tail gas generated by the polymerization reaction in the polymerization tank 3 is transported to the treatment tank 1001 through the seventh connecting pipe 1013 and the first intake pipe 1002. First, it comes into contact with a plurality of first condenser pipes 1004. The plurality of first condenser pipes 1004 conduct preliminary condensation of the tail gas at 0-10°C, thereby liquefying the gaseous styrene in the tail gas. The liquefied styrene drips onto the inner bottom of the treatment tank 1001 in the form of water droplets. When a certain amount accumulates, it is transported to the first raw material tank 7 for storage through the fifth connecting pipe 1011. The preliminarily treated tail gas is discharged upward through the second intake pipe 1006 and comes into contact with a plurality of second condenser pipes 1008. The plurality of second condenser pipes 1008 conduct condensation of the tail gas at -20°C, thereby liquefying the gaseous butadiene in the tail gas. The liquefied butadiene drips onto the partition plate 1005 in the treatment tank 1001 in the form of water droplets. When a certain amount accumulates, it is transported to the second raw material tank 8 for storage through the sixth connecting pipe 1012, realizing resource recycling and utilization. The remaining tail gas is filtered and discharged through the filter pipe 1010.

[0052] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. An efficient and environmentally friendly polymerization device for producing styrene-butadiene latex, comprising a chassis (1), characterized in that: A support frame (2) is fixedly connected to the top of the chassis (1), and a polymerization tank (3) is fixedly installed at the center of the top of the chassis (1); A stirring mechanism (4) is installed at the center of the polymerization tank (3), a dispersion mechanism (5) is installed on the stirring mechanism (4), and a material taking mechanism (6) is installed at the rear end of the outer wall of the polymerization tank (3); A first raw material tank (7) and a second raw material tank (8) are respectively and fixedly installed on both sides of the top of the chassis (1) close to the polymerization tank (3). A heat exchanger (9) is fixedly installed at the rear end of the top of the support frame (2), and a recycling mechanism (10) is fixedly installed at the center of the top of the support frame (2). The recycling mechanism (10) includes a treatment tank (1001) fixedly connected to the center of the top of the support frame (2). A first intake pipe (1002) is fixedly connected to the center of the inner surface of the bottom of the treatment tank (1001). A first mounting plate (1003) is fixedly connected inside the treatment tank (1001). A plurality of first condenser pipes (1004) are fixedly installed at the bottom of the first mounting plate (1003). A partition plate (1005) is fixedly connected above the first mounting plate (1003) inside the treatment tank (1001). A second intake pipe (1006) is fixedly connected to the center of the top of the partition plate (1005). A second mounting plate (1007) is fixedly connected above the partition plate (1005) inside the treatment tank (1001). A plurality of second condenser pipes (1008) are fixedly installed at the bottom of the second mounting plate (1007). The tops of the first intake pipe (1002) and the second intake pipe (1006) are both fixedly connected with umbrella caps (1009). A filter pipe (1010) is fixedly connected to the center of the top of the treatment tank (1001). A fifth connecting pipe (1011) and a sixth connecting pipe (1012) are fixedly connected between the treatment tank (1001) and the first raw material tank (7) and the second raw material tank (8) respectively. One end of the fifth connecting pipe (1011) is located below a plurality of first condenser pipes (1004). One end of the sixth connecting pipe (1012) is located below a plurality of second condenser pipes (1008). A seventh connecting pipe (1013) is fixedly connected between the first intake pipe (1002) and the polymerization tank (3).

2. The high-efficiency and environmentally friendly polymerization device for producing styrene-butadiene latex according to claim 1, wherein, A discharge pipe (31) is fixedly connected to the center of the bottom of the polymerization tank (3). A base (32) is fixedly connected to the center of the inner surface of the bottom of the polymerization tank (3). An annular groove (33) is formed in the inner surface of the top of the polymerization tank (3). Feed sleeves (34) are fixedly connected to both sides of the top of the polymerization tank (3). First springs (35) are installed in both of the feed sleeves (34). Spheres (36) are fixedly connected to the bottom ends of both of the first springs (35).

3. The high-efficiency and environmentally friendly polymerization device for producing styrene-butadiene latex according to claim 2, wherein, The stirring mechanism (4) includes a stirring tube (401) rotatably connected between the top of the polymerization tank (3) and the base (32). A sealing disc (402) is rotatably connected to the top end of the stirring tube (401). Two fixed tubes (403) are fixedly connected to both sides of the outer wall of the stirring tube (401). A scraping bar (404) is fixedly connected between one ends of the two fixed tubes (403). A plurality of stirring plates (405) are fixedly connected to the inner ends of the outer walls of the two scraping bars (404). The inner cavities between the plurality of fixed tubes (403) and the corresponding scraping bars (404) and the corresponding stirring plates (405) are in communication with each other.

4. The high-efficiency and environmentally friendly polymerization device for producing styrene-butadiene latex according to claim 3, characterized in that, The dispersion mechanism (5) includes two movable plates (501) fixedly connected to the outer wall of the stirring tube (401). Two rotating shafts (502) are rotatably connected between the two movable plates (501). A plurality of dispersion serrated discs (503) are fixedly connected to the outer walls of the two rotating shafts (502). First gears (504) are fixedly connected to the top ends of the outer walls of the two rotating shafts (502). A toothed ring (505) is fixedly installed in the annular groove (33). A second gear (506) is fixedly connected to the top end of the outer wall of the stirring tube (401). A frame (507) is fixedly connected to the front end of the top of the polymerization tank (3). A motor (508) is fixedly installed on the top of the frame (507). A third gear (509) is fixedly connected to the outer wall of the output shaft of the motor (508).

5. The high-efficiency and environmentally friendly polymerization device for producing styrene-butadiene latex according to claim 4, characterized in that, Both of the two first gears (504) are engaged with the toothed ring (505). The third gear (509) is engaged with the second gear (506). In the combined state, the movable plate (501) is in contact with the two spheres (36).

6. The high-efficiency and environmentally friendly polymerization device for producing styrene-butadiene latex according to claim 1, wherein, The material taking mechanism (6) includes a connecting sleeve (601) fixedly connected to the rear end of the outer wall of the polymerization tank (3). An outlet (602) is provided at the bottom end of the outer wall of the connecting sleeve (601). A material taking plug (603) is provided in the connecting sleeve (601). A material groove (604) is provided on the outer wall of the material taking plug (603). A pull rod (605) is fixedly connected to the outer end of the material taking plug (603). A connecting plate (606) is fixedly connected to the outer end of the connecting sleeve (601). A fixing plate (607) is rotatably connected to the outer wall of the pull rod (605). A second spring (608) is fixedly connected between the fixing plate (607) and the connecting plate (606). Two limiting rods (609) are fixedly connected to the inner end of the fixing plate (607).

7. The high-efficiency and environmentally friendly polymerization device for producing styrene-butadiene latex according to claim 6, wherein The pull rod (605) is slidably connected to the connecting sleeve (601). A pointer (6051) is provided on the pull rod (605). The pointer (6051) is aligned with the material groove (604). Both of the two limiting rods (609) penetrate through the connecting plate (606).

8. The high-efficiency and environmentally friendly polymerization device for producing styrene-butadiene latex according to claim 2, wherein, On both sides of the top of the support frame (2), pump bodies (71) are fixedly installed. First connecting pipes (72) are fixedly connected between the two pump bodies (71) and the first raw material tank (7) and the second raw material tank (8) respectively. Second connecting pipes (73) are fixedly connected between the two pump bodies (71) and the corresponding feeding sleeves (34) respectively.

9. The high-efficiency and environmentally friendly polymerization device for producing styrene-butadiene latex according to claim 3, characterized in that, A third connecting pipe (91) and a fourth connecting pipe (92) are fixedly connected between the heat exchanger (9) and the sealing disc (402).

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