Carboxylic butyronitrile latex continuous coagulation device with multiple kettles connected in series

Abstract

The utility model provides a carboxyl butyronitrile latex continuous coagulation device with multiple kettles connected in series, which comprises a coagulation kettle, supporting seats are arranged on two sides of the coagulation kettle, a feed port is fixedly connected to the bottom of the coagulation kettle, and a latex feed pipeline is arranged at one end of the feed port. The utility model provides a carboxyl butyronitrile latex continuous coagulation device with multiple kettles connected in series, which is characterized in that a motor is matched with a transmission part, a hollow stirring shaft, a stirring blade and a hollow flat blade, so that a coagulant entering the coagulation kettles enters latex in a torrent form from an opening through the rotating hollow stirring shaft and the hollow flat blade; the device is simple in structure and convenient to operate, the local concentration of the coagulant is prevented from being too high, the dispersity of the coagulant in latex is effectively improved, large colloidal particles are reduced, meanwhile, the viscous colloidal particles are prevented from being adhered to open holes of the hollow flat blades, and meanwhile the multiple coagulation kettles are matched with the multiple cylindrical filters, the screening device and the high-temperature vibration fluidized bed.

Description

Technical Field

[0001] The utility model relates to the field of carboxyl nitrile latex production, in particular to a carboxyl nitrile latex continuous coagulation device with multiple kettles connected in series. Background Art

[0002] Carboxylated nitrile latex is an anionic polymer emulsion. The molecular weight and particle size distribution of the latex are relatively uniform. It is resistant to oil, solvent, acid and alkali. It can be cross-linked with sulfur and metal oxides. Its stability is better than that of natural latex.

[0003] Nitrile latex is a high molecular polymer emulsion formed by the copolymerization of acrylonitrile and butadiene. Carboxyl nitrile latex is obtained by introducing a monomer with a carboxyl group into the copolymerization of acrylonitrile and butadiene. The introduction of carboxyl group can improve the wear resistance, adhesion, mechanical stability, oil resistance, chemical resistance and other properties of nitrile latex. In addition to preparing disposable gloves and using them as adhesives in textiles, construction, home decoration and other fields, carboxyl nitrile latex can also be demulsified and condensed into powder particles for use in the field of resin modification. This not only broadens the application range of carboxyl nitrile latex, but also enables the further development of high value-added products.

[0004] Since carboxyl nitrile latex has a high viscosity, the current single coagulation kettle is too large, the material mixing is uneven, and the coagulation time of a single coagulation kettle is too long, which affects the coagulation efficiency and product quality of carboxyl nitrile latex.

[0005] Therefore, it is necessary to provide a multi-reactor series-connected carboxyl nitrile latex continuous coagulation device to solve the above-mentioned technical problems. Utility Model Content

[0006] The utility model provides a carboxyl nitrile latex continuous coagulation device with multiple kettles in series, which solves the problems that the coagulation efficiency and product quality of the carboxyl nitrile latex are affected by the large volume of the single coagulation kettle, uneven material mixing and long coagulation time of the single coagulation kettle.

[0007] In order to solve the above technical problems, the utility model provides a multi-reactor series-connected carboxyl nitrile latex continuous coagulation device, comprising:

[0008] A coagulation kettle, wherein both sides of the coagulation kettle are provided with support seats, a feed port is fixedly connected to the bottom of the coagulation kettle, a latex feed pipeline is provided at one end of the feed port, and a release agent feed pipeline is provided on the surface of the latex feed pipeline;

[0009] A motor, wherein the motor is arranged at the top of the coagulation kettle, a transmission member is arranged at the output end of the motor, a hollow stirring shaft is arranged inside the transmission member, a reinforcing ring is arranged on the surface of the hollow stirring shaft, a stirring blade is arranged on the surface of the hollow stirring shaft, a threaded hole is provided inside the hollow stirring shaft, a hollow bolt is connected to the internal thread of the threaded hole, a hollow flat blade is arranged at one end of the hollow bolt, an opening is arranged inside the hollow flat blade, and a coagulant feeding pipeline is arranged at one end of the hollow stirring shaft;

[0010] A discharge port, the discharge port is arranged on one side of the coagulation kettle, a cylindrical filter is arranged at one end of the discharge port, a liquid discharge pipeline is arranged at one side of the cylindrical filter, and a particle discharge pipeline is arranged at one end of the cylindrical filter;

[0011] A screening device, the screening device is arranged at one end of the granule discharge pipeline, and a high-temperature vibrating fluidized bed is arranged at one end of the screening device;

[0012] A wastewater discharge pipeline is arranged on one side of the cylindrical filter.

[0013] Preferably, the hollow stirring shaft is made of hard metal, and the reinforcement ring is arranged between the hollow stirring shaft and the stirring blade to prevent the blade from falling off.

[0014] Preferably, the hollow stirring shaft is provided with a plurality of sets of stirring blades, and all of them are normal blades except the hollow flat blades at the bottom.

[0015] Preferably, the openings are provided on both the upper and lower surfaces of the hollow flat blades, and the hollow flat blades are threadedly connected to the threaded holes on the hollow stirring shaft via the hollow bolts, so as to facilitate independent disassembly of the hollow flat blades.

[0016] Preferably, the transmission member comprises two transmission wheels, and transmission belts are arranged on the surfaces of the two transmission wheels.

[0017] Preferably, a rotating ring is fixedly connected to the surface of the hollow stirring shaft, and a scraper is fixedly connected to the bottom of the rotating ring.

[0018] Preferably, one end of the scraper is fixedly connected to a connecting ring, and the inner surface of the connecting ring is fixedly connected to a connecting rod.

[0019] Compared with the related art, the multi-reactor series-connected carboxyl nitrile latex continuous coagulation device provided by the utility model has the following beneficial effects:

[0020] The utility model provides a carboxyl nitrile latex continuous coagulation device with multiple kettles connected in series. The coagulant entering the coagulation kettle through a motor cooperates with a transmission part, a hollow stirring shaft, a stirring blade and a hollow flat blade is passed through the rotating hollow stirring shaft and the hollow flat blade, and enters the latex from the opening in the form of a torrent, thereby avoiding excessive local concentration of the coagulant, effectively improving the dispersibility of the coagulant in the latex, reducing the generation of large particles of rubber particles, and also avoiding the adhesion of sticky rubber particles to the openings of the hollow flat blades. At the same time, multiple coagulation kettles are matched with multiple cylindrical filters, screening devices and high-temperature vibrating fluidized beds to connect multiple coagulation kettles in series, thereby avoiding the large volume of a single coagulation kettle, uneven material mixing, and too long coagulation time of a single coagulation kettle, which affect the coagulation efficiency and product quality of the carboxyl nitrile latex. At the same time, the multiple coagulation kettles connected in series can completely coagulate the solids in the latex, thereby avoiding the waste of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a first embodiment of a multi-reactor series-connected carboxyl nitrile latex continuous coagulation device provided by the utility model;

[0022] Figure 2 for Figure 1 A schematic cross-sectional structural diagram of the overall device shown;

[0023] Figure 3 for Figure 2 The schematic diagram of the structure of the hollow flat blade shown;

[0024] Figure 4 The utility model provides a structural schematic diagram of a second embodiment of a multi-reactor series-connected carboxyl nitrile latex continuous coagulation device.

[0025] Numbers in the figure: 1. latex feed pipeline, 2. release agent feed pipeline, 3. coagulant feed pipeline, 4. motor, 5. transmission part, 6. hollow stirring shaft, 7. stirring blade, 8. hollow flat blade, 9. support seat, 10. feed port, 11. discharge port, 12. cylindrical filter, 13. liquid discharge pipeline, 14. particle discharge pipeline, 15. screening device, 16. high-temperature vibrating fluidized bed, 17. wastewater discharge pipeline, 18. reinforcement ring, 19. opening, 20. threaded hole, 21. hollow bolt, 22. coagulant kettle, 23. rotating ring, 24. scraper, 25. connecting ring, 26. connecting rod. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0027] First embodiment

[0028] Please refer to Figure 1 , Figure 2and Figure 3 ,in, Figure 1 A schematic structural diagram of a first embodiment of a multi-reactor series-connected carboxyl nitrile latex continuous coagulation device provided by the utility model; Figure 2 for Figure 1 A schematic cross-sectional structural diagram of the overall device shown; Figure 3 for Figure 2 A multi-reactor continuous coagulation device for carboxylated nitrile latex, comprising:

[0029] A coagulation kettle 22, wherein support seats 9 are arranged on both sides of the coagulation kettle 22, a feed port 10 is fixedly connected to the bottom of the coagulation kettle 22, a latex feed pipeline 1 is arranged at one end of the feed port 10, and a release agent feed pipeline 2 is arranged on the surface of the latex feed pipeline 1;

[0030] A motor 4, wherein the motor 4 is arranged at the top of the coagulation kettle 22, a transmission member 5 is arranged at the output end of the motor 4, a hollow stirring shaft 6 is arranged inside the transmission member 5, a reinforcing ring 18 is arranged on the surface of the hollow stirring shaft 6, a stirring blade 7 is arranged on the surface of the hollow stirring shaft 6, a threaded hole 20 is provided inside the hollow stirring shaft 6, a hollow bolt 21 is connected to the inner thread of the threaded hole 20, a hollow flat blade 8 is arranged at one end of the hollow bolt 21, an opening 19 is arranged inside the hollow flat blade 8, and a coagulant feeding pipeline 3 is arranged at one end of the hollow stirring shaft 6;

[0031] A discharge port 11, the discharge port 11 is arranged at one side of the coagulation kettle 22, a cylindrical filter 12 is arranged at one end of the discharge port 11, a liquid discharge pipeline 13 is arranged at one side of the cylindrical filter 12, and a particle discharge pipeline 14 is arranged at one end of the cylindrical filter 12;

[0032] A screening device 15, wherein the screening device 15 is disposed at one end of the pellet discharging pipeline 14, and a high-temperature vibrating fluidized bed 16 is disposed at one end of the screening device 15;

[0033] A wastewater discharge pipeline 17 is provided at one side of the cylindrical filter 12 .

[0034] The hollow stirring shaft 6 is made of hard metal, and the reinforcing ring 18 is arranged between the hollow stirring shaft 6 and the stirring blade 7 to prevent the blade from falling off.

[0035] The hollow stirring shaft 6 is provided with a plurality of stirring blades 7 , and all of them are normal blades except the hollow flat blade 8 at the bottom.

[0036] The openings 19 are formed on both the upper and lower surfaces of the hollow flat blade 8 , and the hollow flat blade 8 is threadedly connected to the threaded hole 20 on the hollow stirring shaft 6 via the hollow bolt 21 , so as to facilitate the independent disassembly of the hollow flat blade 8 .

[0037] The transmission member 5 includes two transmission wheels, and transmission belts are arranged on the surfaces of the two transmission wheels.

[0038] There are a latex feed pipeline 1, an isolating agent feed pipeline 2 and a coagulant feed pipeline 3, wherein the isolating agent feed pipeline 2 is connected to the latex feed pipeline 1, and the isolating agent is preliminarily mixed with the latex before entering the coagulation kettle 22. The mixed latex and isolating agent enter from the feed port 10 at the bottom of the coagulation kettle, and the coagulant enters from the top of the coagulation kettle 22 through the coagulant feed pipeline 3.

[0039] The coagulation kettle 22 is fixed and supported by the support seat 9 to prevent the hollow stirring shaft 6 from driving the coagulation kettle 22 to move.

[0040] The transmission method is mechanical transmission. The output end of the stirring motor 4 is fixedly connected to a transmission wheel, and the surface of the hollow stirring shaft 6 is also fixedly connected to a transmission wheel. The two transmission wheels are connected by a transmission belt. The motor 4 drives the transmission wheel connected to the transmission belt to rotate to one side, thereby driving the other transmission wheel connected to the hollow stirring shaft 6 to rotate to one side.

[0041] The surface of the hollow stirring shaft 6 is provided with multiple sets of stirring blades 7 and a specially made hollow flat blade 8 at the bottom. The upper and lower surfaces of the hollow flat blade 8 are provided with openings 19. The coagulant passes through the hollow stirring shaft 6, the hollow flat blade 8 and the opening 19 in sequence and enters the latex in the form of a torrent. The latex contacts the coagulant to break the emulsion and condense to form rubber particles. Under the action of the isolation agent, an isolation layer is formed on the surface of the rubber particles to avoid the formation of large rubber blocks.

[0042] In order to prevent the hollow stirring shaft 6 from deformation, hard metal is selected as its material. In order to prevent the stirring blade 7 from falling off, a reinforcing ring 18 is added at the connection between the stirring blade 7 and the hollow stirring shaft 6. The reinforcing ring 18 is made of hard metal.

[0043] The hollow flat blade 8 is connected to the threaded hole 20 on the hollow stirring shaft 6 through a hollow bolt 21. When the hollow flat blade 8 is deformed or blocked by rubber particles, it is easy to clean and replace.

[0044] The cylindrical filter 12 is used for coagulating latex into particles in the coagulation kettle 22. As the liquid flows out from the discharge port 11 on the upper side of the coagulation kettle 22, it is separated into solid and liquid phases through the cylindrical filter 12. The filtered particles enter the post-processing device, and the incompletely coagulated liquid enters from the bottom feed port 10 of the next coagulation kettle 22 through the liquid discharge pipeline 13 for a new round of coagulation and separation. Finally, the completely coagulated liquid is sent to the wastewater treatment station through the wastewater discharge pipeline 17, and part of the wastewater is used to prepare coagulant, thereby reducing the cost of wastewater treatment and realizing the recycling of water resources.

[0045] The sieving device 15 and the high-temperature vibrating fluidized bed 16, the colloid particles separated by the cylindrical filter 12 are uniformly transported to the sieving device 15 through the colloid particle discharge pipeline 14, and the dehydrated colloid particles are sieved to facilitate the next step of drying. The pore size of the molecular sieve should be equivalent to the particle size of the colloid particles, and the isolation layer on the surface of the colloid particles should not be damaged while sieving the colloid particles. The sieved colloid particles enter the high-temperature vibrating fluidized bed 16 for drying to obtain finished carboxyl nitrile latex powder particles.

[0046] The working principle of the multi-reactor series-connected carboxyl nitrile latex continuous coagulation device provided by the utility model is as follows:

[0047] When in use, latex and isolation agent enter the feed port 10 through the latex feed pipeline 1 and the isolation agent feed pipeline 2, and enter the interior of the condensation kettle 22. After starting the motor 4, the transmission member 5 connected to the hollow stirring shaft 6 is driven to rotate to one side, thereby driving multiple stirring blades 7 and two hollow flat blades 8 to rotate, stirring and mixing the interior of the condensation kettle 22 evenly.

[0048] After the coagulant enters the temporal part of the hollow stirring shaft 6 from the coagulant feed pipeline 3, it enters the latex from the bottom hollow flat blade 8 in the form of a torrent, and the latex is demulsified to form particles.

[0049] After the liquid containing the colloid particles enters the interior of the cylindrical filter 12 through the discharge port 11 of the condensation kettle 22, the colloid particles are filtered and separated, and the liquid that is not completely condensed enters the interior of the next condensation kettle 22 until it is completely condensed.

[0050] The separated rubber particles enter the screening device 15 for screening and dispersion, and are dried in the high-temperature vibrating fluidized bed 16 to obtain finished carboxylated nitrile latex powder particles.

[0051] In order to reduce wastewater treatment costs and save water resources, part of the wastewater is used to dissolve solid coagulants and recycled.

[0052] Compared with the related art, the multi-reactor series-connected carboxyl nitrile latex continuous coagulation device provided by the utility model has the following beneficial effects:

[0053] The utility model provides a carboxyl nitrile latex continuous coagulation device with multiple reactors connected in series. The coagulant entering the coagulation reactor 22 is passed through the rotating hollow stirring shaft 6 and the hollow flat blade 8 by a motor 4, and enters the latex from the opening in the form of a torrent, thereby avoiding the local concentration of the coagulant to be too high, effectively improving the dispersibility of the coagulant in the latex, reducing the generation of large particles of colloid, and also avoiding the adhesion of sticky colloid to the opening of the hollow flat blade 8. At the same time, multiple coagulation reactors 22 are matched with multiple cylindrical filters 12, screening devices 15 and high-temperature vibrating fluidized beds 16 to connect multiple coagulation reactors 22 in series, thereby avoiding the single coagulation reactor 22 from being too large in volume, uneven material mixing, and the single coagulation reactor 22 from being too long in coagulation time, which affect the coagulation efficiency and product quality of the carboxyl nitrile latex. At the same time, the multiple coagulation reactors 22 in series can completely coagulate the solids in the latex, thereby avoiding the waste of raw materials.

[0054] Second embodiment

[0055] Please refer to Figure 4 Based on the first embodiment of the present application, a continuous coagulation device for carboxylated nitrile latex with multiple kettles connected in series is provided. The second embodiment of the present application provides another continuous coagulation device for carboxylated nitrile latex with multiple kettles connected in series. The second embodiment is only a preferred mode of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0056] Specifically, the second embodiment of the present application provides a continuous coagulation device for carboxylated nitrile latex with multiple reactors connected in series. The difference is that, in a continuous coagulation device for carboxylated nitrile latex with multiple reactors connected in series, a rotating ring 23 is fixedly connected to the surface of the hollow stirring shaft 6, and a scraper 24 is fixedly connected to the bottom of the rotating ring 23.

[0057] A plurality of scrapers 24 are fixedly connected to the bottom of the rotating ring 23 , and one end of each of the scrapers 24 is fixedly connected to the top of the connecting ring 25 , so as to scrape off the raw materials attached to the inner wall of the condensation kettle 22 .

[0058] A connecting ring 25 is fixedly connected to one end of the scraper 24 , and a connecting rod 26 is fixedly connected to the inner surface of the connecting ring 25 .

[0059] The connecting rod 26 is used to connect to the connecting ring 25 and rotate to one side to scrape the raw materials on the bottom of the inner wall of the condensation kettle 22.

[0060] The working principle of the multi-reactor series-connected carboxyl nitrile latex continuous coagulation device provided by the utility model is as follows:

[0061] When in use, when the hollow stirring shaft 6 rotates to one side, it drives the rotating ring 23 connected to the multiple scrapers 24 to rotate to one side, so as to scrape off the raw materials attached to the inner wall of the condensation kettle 22. At the same time, when the multiple scrapers 24 rotate to one side, they drive the connecting ring 25 connected to the connecting rod 26 to rotate to one side, so as to scrape off the raw materials on the bottom of the inner wall of the condensation kettle 22.

[0062] Compared with the related art, the multi-reactor series-connected carboxyl nitrile latex continuous coagulation device provided by the utility model has the following beneficial effects:

[0063] The utility model provides a carboxyl nitrile latex continuous coagulation device with multiple kettles connected in series, wherein when a hollow stirring shaft 6 rotates to one side, a rotating ring 23 connected to a plurality of scrapers 24 is driven to rotate to one side, so that raw materials attached to the inner wall of the coagulation kettle 22 are scraped off; at the same time, when the plurality of scrapers 24 rotate to one side, a connecting ring 25 connected to a connecting rod 26 is driven to rotate to one side, so that raw materials on the bottom of the inner wall of the coagulation kettle 22 are scraped off, thereby reducing waste and preventing insufficient stirring of raw materials attached to the coagulation kettle 22.

[0064] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A continuous coagulation device for carboxylated nitrile latex with multiple reactors connected in series, characterized in that: include: A coagulation kettle, wherein both sides of the coagulation kettle are provided with support seats, a feed port is fixedly connected to the bottom of the coagulation kettle, a latex feed pipeline is provided at one end of the feed port, and a release agent feed pipeline is provided on the surface of the latex feed pipeline; A motor, wherein the motor is arranged at the top of the coagulation kettle, a transmission member is arranged at the output end of the motor, a hollow stirring shaft is arranged inside the transmission member, a reinforcing ring is arranged on the surface of the hollow stirring shaft, a stirring blade is arranged on the surface of the hollow stirring shaft, a threaded hole is provided inside the hollow stirring shaft, a hollow bolt is connected to the internal thread of the threaded hole, a hollow flat blade is arranged at one end of the hollow bolt, an opening is arranged inside the hollow flat blade, and a coagulant feeding pipeline is arranged at one end of the hollow stirring shaft; A discharge port, the discharge port is arranged on one side of the coagulation kettle, a cylindrical filter is arranged at one end of the discharge port, a liquid discharge pipeline is arranged at one side of the cylindrical filter, and a particle discharge pipeline is arranged at one end of the cylindrical filter; A screening device, the screening device is arranged at one end of the granule discharge pipeline, and a high-temperature vibrating fluidized bed is arranged at one end of the screening device; A wastewater discharge pipeline is arranged on one side of the cylindrical filter.

2. A multi-reactor series-connected carboxyl nitrile latex continuous coagulation device according to claim 1, characterized in that: The hollow stirring shaft is made of hard metal, and the reinforcing ring is arranged between the hollow stirring shaft and the stirring blade to prevent the blade from falling off.

3. A multi-reactor continuous coagulation device for carboxylated nitrile latex according to claim 1, characterized in that: The hollow stirring shaft is provided with a plurality of stirring blades, and all of them are normal blades except the hollow flat blades at the bottom.

4. A multi-reactor continuous coagulation device for carboxylated nitrile latex according to claim 1, characterized in that: The openings are provided on both the upper and lower surfaces of the hollow flat blades, and the hollow flat blades are threadedly connected to the threaded holes on the hollow stirring shaft through the hollow bolts, so as to facilitate the independent disassembly of the hollow flat blades.

5. A multi-reactor series-connected carboxyl nitrile latex continuous coagulation device according to claim 1, characterized in that: The transmission member comprises two transmission wheels, and transmission belts are arranged on the surfaces of the two transmission wheels.

6. A multi-reactor series-connected carboxyl nitrile latex continuous coagulation device according to claim 3, characterized in that: A rotating ring is fixedly connected to the surface of the hollow stirring shaft, and a scraper is fixedly connected to the bottom of the rotating ring.

7. A multi-reactor continuous coagulation device for carboxylated nitrile latex according to claim 6, characterized in that: One end of the scraper is fixedly connected with a connecting ring, and the inner surface of the connecting ring is fixedly connected with a connecting rod.

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