Device and method for manufacturing modified superfine ground calcium carbonate powder

Abstract

The invention provides a manufacturing device and method of modified superfine heavy calcium carbonate powder, and relates to a manufacturing device and method of heavy calcium carbonate powder, the manufacturing device of the modified superfine heavy calcium carbonate powder comprises a coating bin, and an air inlet nozzle is arranged on the coating bin; the feeding mechanism is communicated with the interior of the coating bin; the liquid spraying pipe is arranged in the coating bin in a penetrating manner; the depolymerization bin is communicated with the coating bin; the first valve mechanism is used for controlling on-off of material conveying between the coating bin and the depolymerization bin; the negative pressure conveying mechanism is communicated with the depolymerization bin; and the second valve mechanism is used for controlling on-off of material conveying between the depolymerization bin and the negative pressure conveying mechanism. Therefore, the retention time of the materials in the coating bin is prolonged, the mixed coating effect of the calcium carbonate powder and the liquid modifier is improved, the retention time of the materials in the depolymerization bin is prolonged, and the crushing and depolymerization effects on the materials are improved.

Description

Technical Field

[0001] The present application relates to the technical field of a device and method for producing heavy calcium carbonate powder, and in particular to a device and method for producing modified ultrafine heavy calcium carbonate powder. Background Art

[0002] Ultrafine heavy calcium carbonate powder has a wide range of applications in the medical field. It can be used as a calcium agent to treat calcium deficiency, osteoporosis and other diseases. It can also be used as a drug carrier to improve the stability and solubility of drugs, thereby improving drug efficacy. Modified ultrafine heavy calcium carbonate powder is based on ultrafine heavy calcium carbonate powder. The surface is modified by physical, chemical or a combination of the two methods to improve its particle morphology, dispersibility, lipophilicity and other properties. For example: ultrafine heavy calcium carbonate powder can more effectively protect drug molecules through surface modification, prevent degradation or inactivation during storage and use, and thus improve the stability of the drug; the modified ultrafine heavy calcium carbonate powder has better dispersibility and solubility, which helps to improve the absorption rate of calcium in the intestine, thereby more effectively supplementing the calcium needed by the human body; the modified ultrafine heavy calcium carbonate powder can improve the uniformity, fluidity and compressibility of the preparation by optimizing the particle size and surface properties of calcium carbonate powder, thereby producing higher quality and more stable performance drugs; the modified ultrafine heavy calcium carbonate powder has good biocompatibility and can be used in the biomedicine field, such as as a bone repair material, drug delivery system, etc.

[0003] The modification methods of modified ultrafine heavy calcium carbonate powder mainly include physical modification and chemical modification. Physical modification changes the surface morphology and dispersibility of particles through physical means such as mechanical force and ultrasound. Chemical modification uses chemical substances such as surfactants and coupling agents to react with the surface of particles to form a new surface layer, thereby changing the surface properties of particles. For example, the invention patent with publication number CN105860587B discloses a chemical modification device named calcium carbonate powder surface modification equipment, which includes a calcium carbonate powder mixing and conveying device, a calcium carbonate powder surface coating device, and a wind energy filtering and collecting device connected in sequence; the calcium carbonate powder mixing and conveying device mixes calcium carbonate powders of different particle sizes and conveys them to the calcium carbonate powder surface coating device; the calcium carbonate powder surface coating device sprays liquid organic matter on the calcium carbonate powder and stirs it with a high-speed mixer to fully coat the organic matter on the surface of the calcium carbonate; the wind energy filtering and collecting device uses a fan to extract the material in the high-speed mixer, uses a dust collector to filter out the calcium carbonate powder in the airflow and collects the calcium carbonate powder.

[0004] However, since the above-mentioned calcium carbonate powder surface modification equipment adopts wind power for continuous production and transportation, the calcium carbonate powder stays in the mixing box for a short time, resulting in that the mixed coating effect of the liquid organic matter and the calcium carbonate powder is not very ideal. At the same time, the liquid organic matter is easily agglomerated when sprayed on the calcium carbonate powder. If the liquid organic matter stays in the mixing box for a short time, it cannot achieve a good deagglomeration effect. Summary of the invention

[0005] The purpose of the present application is to provide a device and method for manufacturing modified ultrafine heavy calcium carbonate powder, which is used to solve the problem that the mixed coating effect of liquid organic matter and calcium carbonate powder in the surface modification equipment of calcium carbonate powder in the related art is not very ideal, and the agglomerated calcium carbonate powder cannot be deagglomerated well.

[0006] In the first aspect, the present application provides a modified ultrafine heavy calcium carbonate powder manufacturing device adopts the following technical solution:

[0007] A manufacturing device for modified ultrafine heavy calcium carbonate powder, comprising:

[0008] A coating bin, wherein an air inlet nozzle is provided on the coating bin;

[0009] A feeding mechanism, the feeding mechanism is connected to the interior of the coating bin;

[0010] A liquid spraying pipe, the liquid spraying pipe is arranged in the coating bin;

[0011] a depolymerization bin, the depolymerization bin being in communication with the coating bin;

[0012] A first valve mechanism, the first valve mechanism is used to control the on-off of material transportation between the coating bin and the depolymerization bin;

[0013] A negative pressure conveying mechanism, the negative pressure conveying mechanism is connected to the depolymerization bin;

[0014] The second valve mechanism is used to control the on / off of material transportation between the deagglomeration bin and the negative pressure transportation mechanism.

[0015] Optionally, it also includes a rotating drive member and a rotating joint, the spray pipe is rotatably arranged in the coating bin, the spray pipe is provided with branch pipes distributed along the circumferential direction, the branch pipes are provided with nozzles, the rotating drive member is fixed on the coating bin and connected to the spray pipe, the stator of the rotating joint is fixed on the coating bin, and the rotor of the rotating joint is connected to the spray pipe.

[0016] Optionally, the first valve mechanism includes a valve core and an elastic member, the coating bin is provided with a discharge pipe and a valve cylinder connected to the discharge pipe, the valve cylinder is connected to the depolymerization bin through a feed pipe, the valve core is slidably arranged in the valve cylinder, the elastic member is arranged on the valve cylinder and acts on the valve core, the elastic member can push the valve core to separate the valve cylinder from the feed pipe, and when the air pressure in the coating bin rises, the elastic force of the elastic member can be overcome to push the valve core to connect the valve cylinder and the feed pipe.

[0017] Optionally, the coating bin is cylindrical, and is provided with a feed pipe tangent to the cylindrical coating bin, the feeding mechanism is connected to the feed pipe, the air inlet nozzle is provided at the end of the feed pipe, and the discharge pipe is tangent to the cylindrical coating bin.

[0018] Optionally, the second valve mechanism includes a valve plate, the depolymerization bin is provided with a discharge pipe connected to the negative pressure conveying mechanism, the valve plate can be opened and closed on the discharge pipe, the valve core is connected to the valve plate through a linkage mechanism, and when the valve core moves, the valve plate can be driven to open or close through the linkage mechanism.

[0019] Optionally, the linkage mechanism includes a sliding sleeve and a connecting rod. The sliding sleeve is arranged on the outside of the discharge pipe and is connected to the valve core through a transmission assembly. When the valve core moves, the sliding sleeve can be driven by the transmission assembly to slide along the axial direction of the discharge pipe. A valve stem is provided on the valve plate, and the valve stem is hinged to the discharge pipe. Both ends of the connecting rod are respectively hinged to the valve stem and the sliding sleeve.

[0020] Optionally, the transmission assembly includes a rotating shaft and a worm, a cover shell connected to the negative pressure conveying mechanism is provided on the outside of the discharge pipe, a first rack is provided on the valve core, the worm is rotatably provided on the cover shell, a first gear meshing with the first rack is provided on the worm, a second rack is provided on the sliding sleeve, the rotating shaft is rotatably provided on the cover shell, a second gear meshing with the second rack, and a worm wheel meshing with the worm are provided on the rotating shaft.

[0021] Optionally, it also includes an axial flow wind force component and a centrifugal wind force component, the axial flow wind force component is arranged in the lower part of the deaggregation bin, and the centrifugal wind force component is arranged in the upper part of the deaggregation bin, the axial flow wind force component is used to blow the material in the lower part of the deaggregation bin to the axial flow wind force component, and the centrifugal wind force component is used to blow the material toward the inner wall of the deaggregation bin.

[0022] Optionally, the centrifugal wind power assembly includes a turntable and a centrifugal driving member, the turntable is rotatably arranged in the upper part of the deagglomeration bin, the turntable is provided with centrifugal blades distributed along the circumferential direction, the centrifugal driving member is fixed on the deagglomeration bin and connected to the turntable, the top wall of the deagglomeration bin is provided with a plurality of crushing rods extending downward, and the crushing rods are located on the circumferential side of the turntable.

[0023] In the second aspect, the present application provides a method for producing a modified ultrafine heavy calcium carbonate powder using the following technical solution:

[0024] A method for producing modified ultrafine heavy calcium carbonate powder is based on the manufacturing device of modified ultrafine heavy calcium carbonate powder and comprises the following steps:

[0025] Step 1. Calcium carbonate powder is fed into the coating bin through a feeding mechanism, the air inlet nozzle is connected to a high-pressure air source, the calcium carbonate powder entering the coating bin is blown away, and at the same time, a liquid modifier is sprayed into the coating bin through a liquid spray pipe to mix and coat the calcium carbonate powder;

[0026] Step 2. The coating bin and the deagglomeration bin are connected through the first valve mechanism, and the deagglomeration bin and the negative pressure conveying mechanism are connected through the second valve mechanism, so that the material in the coating bin enters the deagglomeration bin;

[0027] Step 3. The coating bin is separated from the deagglomeration bin by the first valve mechanism, and the deagglomeration bin is separated from the negative pressure conveying mechanism by the second valve mechanism, so that part of the material is mixed and coated in the coating bin, and the other part of the material is crushed and deagglomerated in the deagglomeration bin;

[0028] Step 4. The coating bin and the deagglomeration bin are periodically connected and disconnected through the first valve mechanism, so that the material in the coating bin periodically enters the deagglomeration bin, and the deagglomeration bin and the negative pressure conveying mechanism are periodically connected and disconnected through the second valve mechanism, so that the material in the deagglomeration bin is periodically discharged into the negative pressure conveying mechanism.

[0029] In summary, the present application includes at least the following beneficial technical effects: the manufacturing device of the modified ultrafine heavy calcium carbonate powder of the present application mixes and coats the calcium carbonate powder and the liquid modifier through the coating bin, and then crushes and depolymerizes the mixed and coated materials in the depolymerization bin, thereby avoiding the agglomeration of the calcium carbonate powder. At the same time, the coating bin and the depolymerization bin are periodically connected and disconnected through the first valve mechanism, so that the material in the coating bin periodically enters the depolymerization bin, and the depolymerization bin and the negative pressure conveying mechanism are periodically connected and disconnected through the second valve mechanism, so that the material in the depolymerization bin is periodically discharged into the negative pressure conveying mechanism, thereby extending the residence time of the material in the coating bin, improving the mixed coating effect of the calcium carbonate powder and the liquid modifier, and extending the residence time of the material in the depolymerization bin, improving the crushing and depolymerization effect of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of a manufacturing device for modified ultrafine heavy calcium carbonate powder in an embodiment of the present application;

[0031] Figure 2 It is a cross-sectional view of the manufacturing device of modified ultrafine heavy calcium carbonate powder in the embodiment of the present application, omitting components such as a cyclone separator and a bag dust collector, from a first perspective;

[0032] Figure 3 This is a schematic structural diagram of the manufacturing device for modified ultrafine heavy calcium carbonate powder in the embodiment of the present application from a second perspective after omitting components such as a cyclone separator and a bag filter;

[0033] Figure 4 for Figure 3 A partial enlarged schematic diagram of part A;

[0034] Figure 5 for Figure 2 A partial enlarged schematic diagram of part B;

[0035] Figure 6 It is a cross-sectional view of the manufacturing device of modified ultrafine heavy calcium carbonate powder in the embodiment of the present application, omitting components such as a cyclone separator and a bag dust collector, from a third perspective;

[0036] Figure 7 for Figure 6 A partial enlarged schematic diagram of part D in the middle;

[0037] Figure 8 It is a cross-sectional view of the manufacturing device for modified ultrafine heavy calcium carbonate powder in the embodiment of the present application, after omitting components such as a cyclone separator and a bag filter;

[0038] Fig. 9 for Figure 8 A partial enlarged schematic diagram of part C in the middle;

[0039] Fig.10 This is a cross-sectional view of the manufacturing device for modified ultrafine heavy calcium carbonate powder in the embodiment of the present application, taken from the fifth perspective after omitting components such as a cyclone separator and a bag dust collector.

[0040] Description of reference numerals:

[0041] 10. Coating bin; 11. Air inlet nozzle; 12. Discharge pipe; 13. Valve cylinder; 131. Bracket; 132. Guide hole; 133. Limiting boss; 14. Feed pipe; 15. Feed pipe;

[0042] 20. liquid spray pipe; 21. branch pipe; 22. spray head;

[0043] 30. deagglomeration bin; 31. discharge pipe; 311. convex ridge; 32. cover shell; 33. crushing rod;

[0044] 40. first valve mechanism; 41. valve core; 411. sliding column; 412. first rack; 42. spring; 43. sliding sleeve; 431. second rack; 44. connecting rod; 45. rotating shaft; 451. second gear; 452. worm gear; 46. worm; 461. first gear;

[0045] 50, second valve mechanism; 51, valve plate; 511, valve stem; 52, first pin shaft; 53, second pin shaft; 54, third pin shaft;

[0046] 60. Axial flow wind power assembly; 61. Central axis; 62. Axial flow drive member; 63. Axial flow blade;

[0047] 70. Centrifugal wind power assembly; 71. Rotating disk; 72. Centrifugal drive member; 73. Centrifugal blades;

[0048] 80. Rotary drive member; 81. Belt transmission member; 90. Rotary joint; 100. Powder silo; 110. Feed valve; 120. Cyclone separator; 130. Bag dust collector; 140. Negative pressure fan; 150. First pipeline; 160. Second pipeline. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1 -Attached Fig. 9 , further details of this application are given.

[0050] The embodiment of the present application discloses a device for manufacturing modified ultrafine heavy calcium carbonate powder.

[0051] A manufacturing device for modified ultrafine heavy calcium carbonate powder includes a coating bin 10, a feeding mechanism, a liquid spraying pipe 20, a depolymerization bin 30, a first valve mechanism 40, a negative pressure conveying mechanism, a second valve mechanism 50, a rotary drive member 80, a rotary joint 90, an axial flow wind power component 60 and a centrifugal wind power component 70.

[0052] Reference Figures 1 to 4 The coating bin 10 is provided with an air inlet nozzle 11, the coating bin 10 is cylindrical, a feeding pipe 15 tangent to the cylindrical coating bin 10 is provided on the coating bin 10, the feeding mechanism is connected with the feeding pipe 15, and the air inlet nozzle 11 is arranged at the end of the feeding pipe 15.

[0053] The feeding mechanism is connected to the interior of the coating bin 10 through the feeding pipe 15 . More specifically, the feeding mechanism includes a powder bin 100 and a feeding valve 110 . The powder bin 100 is connected to the feeding pipe 15 . The feeding valve 110 is disposed at the connection point between the powder bin 100 and the feeding pipe 15 .

[0054] The liquid spraying pipe 20 is rotatably arranged in the coating bin 10, and is used to spray the liquid modifier into the coating bin 10. The liquid spraying pipe 20 is provided with a branch pipe 21 distributed along the circumferential direction, and a nozzle 22 is provided on the branch pipe 21. The stator of the rotary joint 90 is fixed on the coating bin 10, and the rotor of the rotary joint 90 is connected with the liquid spraying pipe 20. The rotary drive member 80 is fixed on the coating bin 10 and connected with the liquid spraying pipe 20. The rotary drive member 80 can adopt a rotary drive motor, and the rotary drive motor can be connected with the liquid spraying pipe 20 through a belt transmission member 81.

[0055] The calcium carbonate powder is fed into the coating bin 10 through the powder bin 100 and the feed valve 110, and the air inlet nozzle 11 is connected to the high-pressure gas source. The high-pressure gas enters the coating bin 10 along the tangent line, and the calcium carbonate powder entering the coating bin 10 is blown away, so that the calcium carbonate powder is swirled in the coating bin 10. At the same time, the liquid spray pipe 20 and the branch pipe 21 are driven to rotate by the rotary drive member 80, and the rotary joint 90 is connected to the liquid modifier, and the liquid modifier is sprayed into the coating bin 10 through the nozzle 22 to mix and coat with the calcium carbonate powder. In the mixed coating process, the coating bin 10 can also be heated by means of an electric heating element or a heat-conducting oil jacket, so that the calcium carbonate powder and the liquid modifier are mixed and coated and then dried quickly.

[0056] Reference Figure 2 and Figure 5 The deagglomeration bin 30 is connected to the coating bin 10, and the first valve mechanism 40 is used to control the on-off of material transportation between the coating bin 10 and the deagglomeration bin 30. In an optional embodiment, the connection relationship between the deagglomeration bin 30 and the coating bin 10, and the structure of the first valve mechanism 40 are as follows:

[0057] The first valve mechanism 40 includes a valve core 41 and an elastic member. The coating bin 10 is provided with a discharge pipe 12 and a valve cylinder 13 connected to the discharge pipe 12. The discharge pipe 12 is tangent to the cylindrical coating bin 10. The valve cylinder 13 is connected to the depolymerization bin 30 through the feed pipe 14. The valve core 41 is slidably arranged in the valve cylinder 13. The valve cylinder 13 is provided with a limit boss 133 for limiting the sliding stroke of the valve core 41.

[0058] The elastic member is arranged on the valve cylinder 13 and acts on the valve core 41. The elastic member can push the valve core 41 to separate the valve cylinder 13 and the feed pipe 14. When the air pressure in the coating bin 10 rises, it can overcome the elastic force of the elastic member to push the valve core 41 to connect the valve cylinder 13 and the feed pipe 14, so that the material in the coating bin 10 can enter the depolymerization bin 30 through the discharge pipe 12, the valve cylinder 13 and the feed pipe 14. When the valve cylinder 13 and the feed pipe 14 are connected, the air pressure in the coating bin 10 decreases. When the air pressure drops to a certain value, the elastic member pushes the valve core 41 again to separate the valve cylinder 13 and the feed pipe 14, so that the depolymerization bin 30 and the coating bin 10 are periodically connected and isolated, thereby prolonging the residence time of the material in the coating bin 10 and improving the mixed coating effect of the calcium carbonate powder and the liquid modifier.

[0059] The elastic member can be a spring 42. More specifically, a bracket 131 is provided on the valve cylinder 13, a sliding column 411 is provided on the valve core 41, a guide hole 132 is provided on the bracket 131, the sliding column 411 slides through the guide hole 132, and the spring 42 is sleeved on the outside of the sliding column 411. The two ends of the spring 42 are respectively in contact with the bracket 131 and the valve core 41.

[0060] Reference Figures 5 to 9 , the negative pressure conveying mechanism is connected to the deagglomeration bin 30, and the second valve mechanism 50 is used to control the on-off of material transportation between the deagglomeration bin 30 and the negative pressure conveying mechanism. In an optional embodiment, the connection relationship between the negative pressure conveying mechanism and the deagglomeration bin 30, and the structure of the second valve mechanism 50 are as follows:

[0061] The second valve mechanism 50 includes a valve plate 51. The depolymerization bin 30 is provided with a discharge pipe 31 connected to the negative pressure conveying mechanism. The valve plate 51 can be opened and closed on the discharge pipe 31. The valve core 41 is connected to the valve plate 51 through a linkage mechanism. When the valve core 41 moves, the valve plate 51 can be driven to open or close through the linkage mechanism.

[0062] When the air pressure in the coating bin 10 rises, the valve core 41 is pushed to connect the valve cylinder 13 and the material delivery pipe 14, and the valve plate 51 is driven to open through the linkage mechanism, so that the deagglomeration bin 30 is connected to the negative pressure conveying mechanism, so that the material in the deagglomeration bin 30 can enter the negative pressure conveying mechanism through the discharge pipe 31. When the air pressure in the coating bin 10 drops to a certain value, the elastic member pushes the valve core 41 to separate the valve cylinder 13 and the material delivery pipe 14, and the valve plate 51 is driven to close through the linkage mechanism, so that the deagglomeration bin 30 is separated from the negative pressure conveying mechanism. In this way, the deagglomeration bin 30 and the negative pressure conveying mechanism can be periodically connected and separated, thereby extending the residence time of the material in the deagglomeration bin 30 and improving the crushing and deagglomeration effect of the material.

[0063] In an optional embodiment, the specific structure of the linkage mechanism, and the specific connection relationship between the valve core 41, the linkage mechanism and the valve plate 51 are as follows: the linkage mechanism includes a sleeve 43 and a connecting rod 44, the sleeve 43 is slidably sleeved on the outside of the discharge pipe 31, and is connected to the valve core 41 through a transmission assembly, and a ridge 311 is provided on the outer wall of the discharge pipe 31 to prevent the sleeve 43 from rotating. When the valve core 41 moves, the sleeve 43 can be driven to slide along the axial direction of the discharge pipe 31 through the transmission assembly, and a valve stem 511 is provided on the valve plate 51, and the valve stem 511 is hinged to the discharge pipe 31 through a first pin shaft 52, and the two ends of the connecting rod 44 are hinged to the valve stem 511 and the sleeve 43 through a second pin shaft 53 and a third pin shaft 54, respectively.

[0064] In an optional embodiment, the specific structure of the transmission assembly, and the specific connection relationship between the valve core 41, the transmission assembly and the sleeve 43 are as follows: the transmission assembly includes a rotating shaft 45 and a worm 46, a cover shell 32 connected to the negative pressure conveying mechanism is provided on the outer side of the discharge pipe 31, two valve plates 51 are provided, and two openable and closable covers are provided at the ends of the discharge pipe 31, a first rack 412 is provided on the valve core 41, the worm 46 is rotatably provided on the cover shell 32, a first gear 461 meshing with the first rack 412 is provided on the worm 46, a second rack 431 is provided on the sleeve 43, the rotating shaft 45 is rotatably provided on the cover shell 32, a second gear 451 meshing with the second rack 431, and a worm wheel 452 meshing with the worm 46 are provided on the rotating shaft 45.

[0065] When the air pressure in the coating bin 10 rises or falls to move the valve core 41, the first gear 461 and the worm 46 are driven to rotate through the first rack 412, and then the worm gear 452 and the second gear 451 are driven to rotate through the worm 46, and then the second rack 431 and the sleeve 43 are driven to slide along the axial direction of the discharge pipe 31 through the second gear 451, and then the valve plate 51 is driven to open or close through the connecting rod 44 and the valve stem 511.

[0066] Reference Figure 8 and Fig.10 The axial flow wind assembly 60 is disposed in the lower part of the deagglomeration bin 30, and the centrifugal wind assembly 70 is disposed in the upper part of the deagglomeration bin 30. The axial flow wind assembly 60 is used to blow the material in the lower part of the deagglomeration bin 30 to the axial flow wind assembly 60, and the centrifugal wind assembly 70 is used to blow the material toward the inner peripheral wall of the deagglomeration bin 30. In an optional embodiment, the axial flow wind assembly 60 and the centrifugal wind assembly 70 may adopt the following structure:

[0067] The axial flow wind power assembly 60 includes a central axis 61 and an axial flow driving member 62. The central axis 61 is rotatably arranged in the lower part of the deagglomeration bin 30. Axial flow blades 63 are arranged on the central axis 61. The axial flow driving member 62 is fixed on the deagglomeration bin 30 and connected to the central axis 61. The axial flow driving member 62 can adopt an axial flow driving motor.

[0068] The centrifugal wind assembly 70 includes a rotating disk 71 and a centrifugal driving member 72. The rotating disk 71 is rotatably arranged in the upper part of the deagglomeration bin 30. The rotating disk 71 is provided with centrifugal blades 73 distributed along the circumferential direction. The centrifugal driving member 72 is fixedly arranged on the deagglomeration bin 30 and connected to the rotating disk 71. The centrifugal driving member 72 can adopt a centrifugal driving motor. The top wall of the deagglomeration bin 30 is provided with a plurality of crushing rods 33 extending downward, and the crushing rods 33 are located on the circumferential side of the rotating disk 71.

[0069] When the material enters the deagglomeration bin 30 from the coating bin 10, the axial flow blade 63 is driven to rotate by the axial flow driving member 62 to blow the material to the turntable 71, and then the turntable 71 and the centrifugal blade 73 are driven to rotate by the centrifugal driving member 72, and the material is blown toward the inner peripheral wall of the deagglomeration bin 30 by the centrifugal blade 73, and then the material collides with the crushing rod 33 and is crushed and falls to the lower part of the deagglomeration bin 30, and then the material in the lower part of the deagglomeration bin 30 is blown upward to the axial flow wind assembly 60 by the axial flow wind assembly 60, and the material is fully crushed and deagglomerated in this cycle. When the material is crushed and deagglomerated in the deagglomeration bin 30, the inside of the deagglomeration bin 30 can also be heated by an electric heating member or a heat-conducting oil jacket to fully dry, crush and deagglomerate the material.

[0070] Reference Figure 1 The negative pressure conveying mechanism includes a cyclone separator 120, a bag dust collector 130 and a negative pressure fan 140. The cyclone separator 120 is connected to the housing 32 through a first pipe 150, the bag dust collector 130 is connected to the cyclone separator 120 through a second pipe 160, and the negative pressure fan 140 is connected to the bag dust collector 130. When the valve plate 51 is opened, the material in the depolymerization bin 30 is collected by the cyclone separator 120 and the bag dust collector 130 in turn under the action of the negative pressure fan 140 to collect the modified depolymerized calcium carbonate powder.

[0071] The embodiments of the present application also disclose a method for producing modified ultrafine heavy calcium carbonate powder.

[0072] A method for manufacturing modified ultrafine heavy calcium carbonate powder is based on a manufacturing device for modified ultrafine heavy calcium carbonate powder and comprises the following steps:

[0073] Step 1. Calcium carbonate powder is fed into the coating bin 10 through the feeding mechanism, the air inlet nozzle 11 is connected to the high-pressure air source, the calcium carbonate powder entering the coating bin 10 is blown away, and at the same time, the spray pipe 20 and the branch pipe 21 are driven to rotate by the rotating drive member 80, and the liquid modifier is sprayed into the coating bin 10 through the nozzle 22 on the spray pipe 20 and the branch pipe 21 to mix and coat the calcium carbonate powder.

[0074] Step 2. The coating bin 10 is connected to the deagglomeration bin 30 through the first valve mechanism 40 , and the deagglomeration bin 30 is connected to the negative pressure conveying mechanism through the second valve mechanism 50 , so that the material in the coating bin 10 enters the deagglomeration bin 30 .

[0075] More specifically, high-pressure air is continuously introduced into the coating bin 10 through the air inlet nozzle 11. When the air pressure in the coating bin 10 rises, the valve core 41 is pushed to move and connect the valve cylinder 13 and the feed pipe 14. When the valve core 41 moves, the first gear 461 and the worm 46 are driven to rotate through the first rack 412, and then the worm wheel 452 and the second gear 451 are driven to rotate through the worm 46. Then, the second rack 431 and the sleeve 43 are driven to slide along the axial direction of the discharge pipe 31 through the second gear 451, and then the valve plate 51 is driven to open through the connecting rod 44 and the valve stem 511, so as to connect the deagglomeration bin 30 with the negative pressure conveying mechanism, so that the material in the coating bin 10 enters the deagglomeration bin 30.

[0076] Step 3. The coating bin 10 is separated from the deagglomeration bin 30 by the first valve mechanism 40, and the deagglomeration bin 30 is separated from the negative pressure conveying mechanism by the second valve mechanism 50, so that part of the material is mixed and coated in the coating bin 10, and the other part of the material is crushed and deagglomerated in the deagglomeration bin 30.

[0077] More specifically, after the coating bin 10 is connected to the deagglomeration bin 30, and the deagglomeration bin 30 is connected to the negative pressure conveying mechanism, the air pressure in the coating bin 10 drops. When the air pressure in the coating bin 10 drops to a certain value, the elastic member pushes the valve core 41 to separate the valve cylinder 13 and the feed pipe 14, and at the same time drives the valve plate 51 to close through the linkage mechanism, thereby isolating the deagglomeration bin 30 from the negative pressure conveying mechanism.

[0078] When the material enters the deagglomeration bin 30, the axial flow blades 63 are driven to rotate by the axial flow driving member 62 to blow the material to the turntable 71, and then the turntable 71 and the centrifugal blades 73 are driven to rotate by the centrifugal driving member 72, and the material is blown toward the inner wall of the deagglomeration bin 30 by the centrifugal blades 73. Then, the material collides with the crushing rod 33 and is crushed and falls to the lower part of the deagglomeration bin 30, and then the material in the lower part of the deagglomeration bin 30 is blown upward to the axial flow wind assembly 60 by the axial flow wind assembly 60, and this cycle is repeated to fully crush and deagglomerate the material.

[0079] Step 4. The coating bin 10 and the deagglomeration bin 30 are periodically connected and disconnected through the first valve mechanism 40, so that the material in the coating bin 10 periodically enters the deagglomeration bin 30; the deagglomeration bin 30 and the negative pressure conveying mechanism are periodically connected and disconnected through the second valve mechanism 50, so that the material in the deagglomeration bin 30 is periodically discharged into the negative pressure conveying mechanism, and the modified deagglomerated calcium carbonate powder is collected through the negative pressure conveying mechanism.

[0080] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for producing modified ultrafine heavy calcium carbonate powder, characterized in that: include: A coating bin (10), wherein the coating bin (10) is provided with an air inlet nozzle (11); A feeding mechanism, the feeding mechanism being in communication with the interior of the coating bin (10); a liquid spraying pipe (20), the liquid spraying pipe (20) being arranged in the coating bin (10); a depolymerization chamber (30), the depolymerization chamber (30) being in communication with the coating chamber (10); A first valve mechanism (40), the first valve mechanism (40) being used to control the on / off of material transportation between the coating bin (10) and the depolymerization bin (30); A negative pressure conveying mechanism, the negative pressure conveying mechanism being in communication with the deagglomeration bin (30); A second valve mechanism (50), wherein the second valve mechanism (50) is used to control the on / off of material transportation between the deagglomeration bin (30) and the negative pressure transportation mechanism.

2. The manufacturing device of modified ultrafine heavy calcium carbonate powder according to claim 1, characterized in that: The invention also comprises a rotary drive member (80) and a rotary joint (90); the liquid spraying pipe (20) is rotatably arranged in the coating bin (10); the liquid spraying pipe (20) is provided with branch pipes (21) distributed along the circumferential direction; the branch pipes (21) are provided with spray heads (22); the rotary drive member (80) is fixedly arranged on the coating bin (10) and connected to the liquid spraying pipe (20); the stator of the rotary joint (90) is fixedly arranged on the coating bin (10); and the rotor of the rotary joint (90) is communicated with the liquid spraying pipe (20).

3. The manufacturing device of modified ultrafine heavy calcium carbonate powder according to claim 1, characterized in that: The first valve mechanism (40) comprises a valve core (41) and an elastic member. The coating bin (10) is provided with a discharge pipe (12) and a valve cylinder (13) connected to the discharge pipe (12). The valve cylinder (13) is connected to the depolymerization bin (30) via a feed pipe (14). The valve core (41) is slidably arranged in the valve cylinder (13). The elastic member is arranged on the valve cylinder (13) and acts on the valve core (41). The elastic member can push the valve core (41) to separate the valve cylinder (13) from the feed pipe (14). When the air pressure in the coating bin (10) rises, it can overcome the elastic force of the elastic member and push the valve core (41) to connect the valve cylinder (13) and the feed pipe (14).

4. The manufacturing device of modified ultrafine heavy calcium carbonate powder according to claim 3, characterized in that: The coating bin (10) is cylindrical, and is provided with a feed pipe (15) tangent to the cylindrical coating bin (10), the feed mechanism is connected to the feed pipe (15), the air inlet nozzle (11) is provided at the end of the feed pipe (15), and the discharge pipe (12) is tangent to the cylindrical coating bin (10).

5. The manufacturing device of modified ultrafine heavy calcium carbonate powder according to claim 3, characterized in that: The second valve mechanism (50) includes a valve plate (51). The deagglomeration bin (30) is provided with a discharge pipe (31) connected to the negative pressure conveying mechanism. The valve plate (51) can be opened and closed on the discharge pipe (31). The valve core (41) is connected to the valve plate (51) through a linkage mechanism. When the valve core (41) moves, the valve plate (51) can be driven to open or close through the linkage mechanism.

6. The manufacturing device of modified ultrafine heavy calcium carbonate powder according to claim 5, characterized in that: The linkage mechanism comprises a sleeve (43) and a connecting rod (44); the sleeve (43) is slidably mounted on the outside of the discharge pipe (31) and is connected to the valve core (41) via a transmission assembly; when the valve core (41) moves, the sleeve (43) can be driven by the transmission assembly to slide along the axial direction of the discharge pipe (31); a valve stem (511) is provided on the valve plate (51); the valve stem (511) is hinged to the discharge pipe (31); and two ends of the connecting rod (44) are respectively hinged to the valve stem (511) and the sleeve (43).

7. The manufacturing device of modified ultrafine heavy calcium carbonate powder according to claim 6, characterized in that: The transmission assembly includes a rotating shaft (45) and a worm (46); a cover (32) connected to the negative pressure conveying mechanism is provided on the outer side of the discharge pipe (31); a first rack (412) is provided on the valve core (41); the worm (46) is rotatably arranged on the cover (32); a first gear (461) meshing with the first rack (412) is provided on the worm (46); a second rack (431) is provided on the sliding sleeve (43); the rotating shaft (45) is rotatably arranged on the cover (32); a second gear (451) meshing with the second rack (431) and a worm wheel (452) meshing with the worm (46) are provided on the rotating shaft (45); 8. The manufacturing device of modified ultrafine heavy calcium carbonate powder according to claim 1, characterized in that: The invention also comprises an axial flow wind force component (60) and a centrifugal wind force component (70), wherein the axial flow wind force component (60) is arranged in the lower part of the deaggregation bin (30), and the centrifugal wind force component (70) is arranged in the upper part of the deaggregation bin (30), and the axial flow wind force component (60) is used to blow the material in the lower part of the deaggregation bin (30) to the axial flow wind force component (60), and the centrifugal wind force component (70) is used to blow the material toward the inner peripheral wall of the deaggregation bin (30).

9. The manufacturing device of modified ultrafine heavy calcium carbonate powder according to claim 8, characterized in that: The centrifugal wind force component (70) comprises a rotating disk (71) and a centrifugal driving member (72); the rotating disk (71) is rotatably arranged in the upper part of the deagglomeration bin (30); the rotating disk (71) is provided with centrifugal blades (73) distributed along the circumferential direction; the centrifugal driving member (72) is fixedly arranged on the deagglomeration bin (30) and connected to the rotating disk (71); the top wall of the deagglomeration bin (30) is provided with a plurality of crushing rods (33) extending downward; the crushing rods (33) are located on the circumferential side of the rotating disk (71).

10. A method for producing modified ultrafine heavy calcium carbonate powder, characterized in that: The manufacturing device of the modified ultrafine heavy calcium carbonate powder according to claim 1 comprises the following steps: Step 1. Calcium carbonate powder is fed into the coating bin (10) through a feeding mechanism, and the air inlet nozzle (11) is connected to a high-pressure air source to blow away the calcium carbonate powder entering the coating bin (10), and at the same time, a liquid modifier is sprayed into the coating bin (10) through a liquid spray pipe (20) to mix with the calcium carbonate powder for coating; Step 2. The coating bin (10) and the deagglomeration bin (30) are connected through the first valve mechanism (40), and the deagglomeration bin (30) and the negative pressure conveying mechanism are connected through the second valve mechanism (50), so that the material in the coating bin (10) enters the deagglomeration bin (30); Step 3. The coating bin (10) is separated from the deagglomeration bin (30) by the first valve mechanism (40), and the deagglomeration bin (30) is separated from the negative pressure conveying mechanism by the second valve mechanism (50), so that a part of the material is mixed and coated in the coating bin (10), and the other part of the material is crushed and deagglomerated in the deagglomeration bin (30); Step 4. The coating bin (10) and the deagglomeration bin (30) are periodically connected and disconnected by the first valve mechanism (40), so that the material in the coating bin (10) periodically enters the deagglomeration bin (30), and the deagglomeration bin (30) and the negative pressure conveying mechanism are periodically connected and disconnected by the second valve mechanism (50), so that the material in the deagglomeration bin (30) is periodically discharged into the negative pressure conveying mechanism.

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