Stirring device for carbon black surface modification

Abstract

The utility model discloses a stirring device for carbon black surface modification, which comprises a stirring kettle, a stirring mechanism is arranged in the stirring kettle, the stirring mechanism comprises a stirring shaft arranged in the stirring kettle and a stirring motor which is arranged at the top of the stirring kettle and drives the stirring shaft to rotate, and a spiral stirring blade is arranged at the upper part of the stirring shaft. Anchor type stirring blades are arranged at the bottom of the stirring shaft; a scraping plate matched with the bottom of the stirring kettle in shape and propped against the bottom of the stirring kettle is arranged at the bottom of the anchor type stirring blade; a plurality of elastic bulges are arranged on the inner wall of the stirring kettle; the surface modifier storage tank is communicated with the stirring kettle; and a spraying head communicated with the surface modifier storage tank is arranged at the top of the stirring kettle. The device has a good stirring effect, and can ensure that carbon black and a surface modifier are fully mixed, so that the modification efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to carbon black modification technical field, concretely relates to a kind of stirring device for carbon black surface modification. BACKGROUND

[0002] Carbon black has unique physical and chemical structure and performance, it plays an important role in tire, rubber, plastics, paint and printing and other multiple fields. However, due to the lack of polar groups on the surface of carbon black particles, its surface presents inert characteristics, which limits its application range to some extent. Moreover, when carbon black is added to the base material as reinforcing material, due to the poor compatibility of the surface of carbon black particles with the base material, it will lead to poor particle dispersion, and then affect the overall performance of the material. Therefore, in order to improve the applicability of carbon black and improve the compatibility of carbon black and matrix, carbon black needs to be modified.

[0003] At present, the modification methods of carbon black mainly include the following: 1. By chemical grafting method, macromolecular polymer with the same properties as the base polymer is grafted on the surface of carbon black particles, so as to enhance the interaction between particles and matrix and change the polarity of particle surface; 2. Use the chemical reaction of part of functional groups on coupling agent with the functional groups on the surface of carbon black to change the group structure and distribution on the surface of carbon black, so as to improve the compatibility with matrix and the dispersion of itself; 3. Dispersant modification: use small molecule dispersant or macromolecular dispersant to treat the surface of carbon black, so as to enhance its dispersion in the base material. The mixing efficiency of carbon black and surface modifier in the above modification methods will directly affect the modification effect of carbon black. The structure of the current stirring device is single, and the stirring effect is not good, so that the carbon black cannot be fully mixed with the stirring, therefore, how to provide a device with good stirring and mixing effect is a problem to be solved by the person skilled in the art. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a stirring device for carbon black surface modification is provided, which has good stirring effect and can ensure that carbon black and surface modifier are fully mixed, thereby improving the modification efficiency.

[0005] To solve the above technical problems, the technical scheme of the utility model is:

[0006] A stirring device for carbon black surface modification, comprising a stirring kettle, a stirring mechanism is arranged in the stirring kettle, the stirring mechanism comprises a stirring shaft arranged in the stirring kettle and a stirring motor arranged at the top of the stirring kettle and driving the stirring shaft to rotate, the upper part of the stirring shaft is provided with helical stirring blades, and the bottom of the stirring shaft is provided with anchor stirring blades; the bottom of the anchor stirring blade is provided with a scraper which is adapted to the shape of the bottom of the stirring kettle and abuts against the bottom of the stirring kettle; a plurality of elastic protrusions are arranged on the inner wall of the stirring kettle;

[0007] The surface modifier storage tank is communicated with the stirring kettle, and a spray head communicated with the surface modifier storage tank is arranged on the top of the stirring kettle.

[0008] Preferably, the outer side of the spiral stirring blade is provided with a porous stirring cover connected with the inner wall of the stirring kettle through a connecting rod.

[0009] Preferably, the surface of the scraper is provided with a plurality of helical blades.

[0010] Preferably, the stirring kettle is provided with an air inlet mechanism, the air inlet mechanism comprises an annular air inlet pipe arranged at the bottom of the stirring kettle, the annular air inlet pipe is sleeved on the outer side of the stirring shaft, the bottom and the side towards the stirring shaft of the annular air inlet pipe are both provided with a plurality of air outlet holes, and the annular air inlet pipe is communicated with an air storage tank; and the top of the stirring kettle is further provided with an air outlet.

[0011] Preferably, the air outlet is communicated with the air storage tank through a valve and a pipeline, and a drying tank and a filter are further arranged on the pipeline communicated with the air storage tank.

[0012] Preferably, the drying tank is filled with a plurality of layers of desiccant filling layers.

[0013] Thanks to the above technical scheme, the device has the following advantages:

[0014] The utility model provides a kind of stirring device for carbon black surface modification, including stirring kettle, stirring mechanism is arranged in stirring kettle, stirring mechanism includes the stirring shaft being arranged in stirring kettle and the stirring motor being arranged at the top of stirring kettle and driving stirring shaft rotation, the upper portion of stirring shaft is provided with spiral stirring blade, and the bottom of stirring shaft is provided with anchor type stirring blade;The bottom of anchor type stirring blade is provided with scraper, which is adapted to the shape of the bottom of stirring kettle and abuts against the bottom of stirring kettle;A plurality of elastic protrusions are arranged on the inner wall of stirring kettle;Surface modifier storage tank is further communicated with stirring kettle, and the top of stirring kettle is provided with spray head communicated with surface modifier storage tank.The combined arrangement of spiral stirring blade and anchor type stirring blade in the above structure not only ensures the good suspension and preliminary dispersion of carbon black in stirring kettle, but also enhances the turning of bottom material, reduces the deposition of carbon black, and further improves the dispersion effect of carbon black.The setting of scraper further scrapes the material deposited in the bottom of stirring kettle, and improves the dispersion effect of carbon black.

[0015] The outer side of the spiral stirring blade of the device is provided with a porous stirring cover, and the porous stirring cover is connected with the inner wall of the stirring kettle through a connecting rod.The setting of the porous stirring cover changes the flow path of fluid in the stirring kettle, helps to increase the shear force and collision frequency between fluids, and thus improves the mixing efficiency.

[0016] The scraper of this device has multiple helical blades on its surface. On the one hand, the helical blades generate forced convection and shear force through rotation, which can continuously push the material forward and cut and turn it, so that the material forms a circulating flow in the mixing tank, thereby achieving a uniform mixing effect. On the other hand, the helical blades can also increase the contact area between the material and the mixing mechanism, thereby improving the mixing efficiency.

[0017] The mixing vessel of this device is equipped with an air intake mechanism, which includes an annular air intake pipe located at the bottom of the mixing vessel. The annular air intake pipe is sleeved on the outside of the stirring shaft. Multiple air outlets are provided at the bottom of the annular air intake pipe and on the side facing the stirring shaft. The annular air intake pipe is connected to an air storage tank. An exhaust port is also provided at the top of the mixing vessel. These features increase the number of air bubbles in the liquid, further enhancing the mixing effect of carbon black and the surface modifier.

[0018] The exhaust port of this device is connected to an air storage tank via valves and pipes. A drying tank and a filter are also installed on the pipes connecting the exhaust port and the air storage tank; the drying tank is filled with multiple layers of desiccant. This setup allows for the treatment and recycling of gas escaping from the stirred tank, resulting in energy savings and reduced consumption. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Fig. 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0021] Fig. 2 This is a schematic diagram of the structure of the annular air intake pipe of this utility model;

[0022] Fig. 3 This is a schematic diagram of the scraper structure of this utility model;

[0023] In the diagram, 1. Mixing vessel; 2. Mixing shaft; 3. Mixing motor; 4. Spiral mixing blade; 5. Anchor mixing blade; 6. Scraper; 7. Elastic protrusion; 8. Surface modifier storage tank; 9. Spray head; 10. Porous mixing hood; 11. Connecting rod; 12. Helical blade; 13. Annular air inlet pipe; 14. Air outlet; 15. Air storage tank; 16. Exhaust port; 17. Drying tank; 18. Filter; 19. Desiccant filling layer. Detailed Implementation

[0024] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application

[0025] Embodiment 1

[0026] As Figs. 1 to 3 shown, a stirring device for surface modification of carbon black, comprising a stirring kettle 1, a stirring mechanism is arranged in the stirring kettle 1, the stirring mechanism comprises a stirring shaft 2 arranged in the stirring kettle 1 and a stirring motor 3 arranged at the top of the stirring kettle 1 and driving the stirring shaft 2 to rotate, the upper part of the stirring shaft 2 is provided with a spiral stirring blade 4, and the bottom of the stirring shaft 2 is provided with an anchor stirring blade 5; the bottom of the anchor stirring blade 5 is provided with a scraper 6 which is adapted to the shape of the bottom of the stirring kettle 1 and abuts against the bottom of the stirring kettle 1; a plurality of elastic protrusions 7 are arranged on the inner wall of the stirring kettle 1;

[0027] Further comprising a surface modifier storage tank 8 communicated with the stirring kettle 1, and a spraying head 9 communicated with the surface modifier storage tank 8 is arranged at the top of the stirring kettle 1.

[0028] Based on the above arrangement, the cooperation of the spiral stirring blade 4 and the anchor stirring blade 5 can effectively improve the mixing efficiency, mainly by utilizing the shear force and lifting force generated by the rotation of the spiral stirring blade 4 to lift the carbon black raw materials from the bottom to the top of the stirring kettle 1, so as to realize the full mixing of the upper and lower materials, the anchor stirring blade 5 can effectively prevent the carbon black from depositing at the bottom of the stirring kettle 1, and at the same time generate strong vortex to further promote the mixing of the carbon black and the surface modifier. The arrangement of the scraper 6 at the bottom of the anchor stirring blade 5 can also ensure that the materials will not be left at the bottom of the stirring kettle 1 during the stirring process, further improving the mixing efficiency. A plurality of elastic protrusions 7 are arranged on the inner wall of the stirring kettle 1, which can collide and rub with the materials during the stirring process, thereby enhancing the stirring effect and making the materials more fully mixed. In addition, the arrangement of the spraying head 9 can ensure that the surface modifier is uniformly sprayed on the carbon black raw materials, thereby realizing good modification effect. In summary, the combined arrangement of various structures greatly improves the modification efficiency of the carbon black, thereby improving the product quality and production efficiency.

[0029] Further, in the embodiment, the outer side of the spiral stirring blade 4 is provided with a perforated stirring cover 10, which is connected with the inner wall of the stirring kettle 1 through a connecting rod 11. The perforated stirring cover 10 can change the flow path of the fluid in the stirring kettle 1, so that the fluid forms a more complex vortex and shear field during stirring, thereby enhancing the uniformity of the material mixing, improving the stirring effect, and thereby improving the modification effect of the carbon black. Based on the combined arrangement of the spiral stirring blade 4 and the perforated stirring cover 10, when the spiral stirring blade 4 rotates, the perforated stirring cover 10 generates additional shear force on the fluid through the hole, which helps to break the material agglomerates and promote the dispersion of fine particles, further improving the stirring efficiency. In addition, the perforated stirring cover 10 can guide the flow direction of the material in the stirring kettle 1, so that the material is more uniformly distributed in the stirring kettle 1.

[0030] Further, in the embodiment, the surface of the scraper 6 is provided with a plurality of spiral blades 12. The scraper 6 can scrape the material deposited at the bottom of the stirring kettle 1, so that the material is re-dispersed in the surface modifier, improving the modification effect of the carbon black, and the spiral blades 12 generate forced convection and shear force by rotation, which can continuously push the material forward and cut and turn it, so that the material forms a circulating flow in the stirring kettle 1, thereby achieving the effect of uniform mixing. The combined arrangement of the scraper 6 and the spiral blade 12 can increase the contact area between the material and the stirring mechanism, improve the stirring efficiency, and at the same time, the strong vortex generated by the rotation of the spiral blade 12 can further promote the contact between the carbon black and the surface modifier, improving the modification effect of the carbon black.

[0031] Further, in the embodiment, the stirring kettle 1 is provided with an air inlet mechanism, which includes an annular air inlet pipe 13 arranged at the bottom of the stirring kettle 1, the annular air inlet pipe 13 is arranged outside the stirring shaft 2, the bottom of the annular air inlet pipe 13 and the side facing the stirring shaft 2 are both provided with a plurality of air outlet holes 14, and the annular air inlet pipe 13 is communicated with an air storage tank 15; the top of the stirring kettle 1 is also provided with an air outlet 16. By introducing a certain amount of air into the stirring kettle 1 through the annular air inlet pipe 13, the air forms bubbles and rises in the material, which process will bring the material flow, reduce the material deposition and agglomeration, and further enhance the fluidity of the material.

[0032] Further, in the embodiment, the air outlet 16 is communicated with the air storage tank 15 through a valve and a pipeline, and a drying tank 17 and a filter 18 are further arranged on the pipeline communicated with the air storage tank 15; the drying tank 17 is filled with a plurality of drying agent filling layers 19. The gas discharged from the stirring kettle 1 is dried in the drying tank 17 and filtered by the filter 18, and then re-enters the air storage tank 15, thereby saving energy and reducing consumption.

[0033] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stirring device for surface modification of carbon black, characterized by: The stirring kettle is provided with a stirring mechanism, which comprises a stirring shaft arranged in the stirring kettle and a stirring motor arranged at the top of the stirring kettle and driving the stirring shaft to rotate, the upper part of the stirring shaft is provided with helical stirring blades, and the bottom of the stirring shaft is provided with anchor stirring blades; the bottom of the anchor stirring blades is provided with a scraper which is adapted to the shape of the bottom of the stirring kettle and abuts against the bottom of the stirring kettle; a plurality of elastic protrusions are arranged on the inner wall of the stirring kettle; The stirring kettle is further provided with a surface modifier storage tank in communication with the stirring kettle, and the top of the stirring kettle is provided with a spraying head in communication with the surface modifier storage tank.

2. A stirring device for surface modification of carbon black as claimed in claim 1 wherein: The outer side of the helical stirring blades is provided with a porous stirring cover which is connected with the inner wall of the stirring kettle through a connecting rod.

3. A stirring device for surface modification of carbon black as claimed in claim 1 wherein: The surface of the scraper is provided with a plurality of solenoid blades.

4. A stirring device for surface modification of carbon black as claimed in claim 1 wherein: The stirring kettle is provided with a gas inlet mechanism, which comprises an annular gas inlet pipe arranged at the bottom of the stirring kettle, the annular gas inlet pipe is sleeved on the outer side of the stirring shaft, the bottom and the side facing the stirring shaft of the annular gas inlet pipe are both provided with a plurality of gas outlet holes, and the annular gas inlet pipe is in communication with an air storage tank; the top of the stirring kettle is further provided with an exhaust port.

5. A stirring device for surface modification of carbon black as claimed in claim 4 wherein: The exhaust port is in communication with the air storage tank through a valve and a pipeline, and the pipeline in communication with the air storage tank is further provided with a drying tank and a filter.

6. A stirring device for surface modification of carbon black as claimed in claim 5 wherein: The drying tank is filled with a plurality of drying agent filling layers.

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