Efficient preparation device for ultrafine production of nano calcium carbonate

Abstract

The invention provides an efficient preparation device for ultrafine production of nano calcium carbonate, and relates to the technical field of nano calcium carbonate preparation, the efficient preparation device comprises a preparation kettle, a feeding mechanism convenient for feeding lime milk is arranged on the preparation kettle, and a charging mechanism convenient for charging during preparation of nano calcium carbonate is arranged on the preparation kettle; the feeding mechanism comprises a feeding pipe, a motor, a rotating rod and a partition plate, the feeding mechanism comprises a storage box and a receiving hopper, and the storage box is located at the upper end of the preparation kettle. According to the device, the feeding pipe, the rotating rod, the material receiving hopper and the material storage box are matched, multiple functions are achieved through single motor driving, the motor drives the feeding pipe to rotate, meanwhile, uniform feeding of lime milk is completed, the stirring rod is driven to conduct stirring and mixing operation, the feeding and mixing procedures are synchronously carried out, and meanwhile the working efficiency is improved. The synchronous feeding and mixing further ensure that the lime milk can be timely and uniformly blended into the gas-liquid-solid three-phase system.

Description

Technical Field

[0001] This invention belongs to the field of nano-calcium carbonate preparation technology, and more specifically, it relates to an efficient preparation device for ultra-fine nano-calcium carbonate production. Background Technology

[0002] The core function of the high-efficiency preparation device for ultrafine nano-calcium carbonate production is to overcome the bottlenecks of traditional preparation technologies, such as uneven particle size, severe agglomeration, low production efficiency, and high energy consumption, by integrating efficient process modules such as raw material mixing and reaction. It achieves precise ultrafine processing of calcium carbonate raw materials and ensures the stability of key indicators such as purity, dispersibility, and uniform particle size distribution of the product.

[0003] The Chinese patent publication number is CN112642381A, which discloses an integrated reactor for preparing nano-calcium carbonate. In this invention, the air pressure generated by the rotation of the spiral fan blades forces carbon dioxide in the inner shell out through a one-way valve. The carbon dioxide is evenly distributed on the top side wall of the inner shell by the one-way valve, so that the carbon dioxide can be evenly dispersed into the calcium hydroxide suspension.

[0004] Existing nano-calcium carbonate production equipment has the following disadvantages: Issues related to uniformity of material feeding: Existing nano-calcium carbonate production equipment often uses a fixed feeding pipe when adding lime slurry. This feeding method easily leads to localized accumulation of lime slurry within the preparation vessel, preventing it from fully contacting and integrating with the gas-liquid-solid three-phase system inside. The resulting localized material concentration differences cause uneven reaction, severely impacting the quality of nano-calcium carbonate production and potentially leading to problems such as uneven particle size distribution and unstable quality.

[0005] Issues related to the control of material input: Existing production equipment has shortcomings in controlling the amount of raw materials fed, often involving large-scale, one-time feeding. This feeding method easily leads to localized reaction overload, as a large amount of raw material is added instantaneously but cannot participate in the reaction in time, resulting in material waste and reduced material utilization. Furthermore, excessive raw materials may disrupt the originally stable reaction conditions within the reactor, making the reaction difficult to control and affecting the stability of product quality.

[0006] Process coordination issues: Currently, the feeding and mixing processes in nano-calcium carbonate production equipment are relatively independent, lacking an effective coordination mechanism. Mixing only occurs after feeding is complete, increasing the intervals between equipment operations and resulting in longer production cycles. Furthermore, this separate operation makes it difficult to ensure the timely and uniform integration of lime slurry into the gas-liquid-solid three-phase system, affecting mixing quality and reducing overall production efficiency. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a highly efficient preparation apparatus for the ultrafine production of nano-calcium carbonate.

[0008] A high-efficiency preparation device for the ultrafine production of nano-calcium carbonate includes a preparation vessel. The preparation vessel is equipped with a feeding mechanism for facilitating the addition of lime slurry and a feeding mechanism for adding materials during the preparation of nano-calcium carbonate. The feeding mechanism includes a feeding pipe, a motor, a rotating rod, and a partition plate. The feeding mechanism also includes a storage tank and a receiving hopper. The storage tank is located at the upper end of the preparation vessel, and a C-shaped upright is fixedly installed between the storage tank and the preparation vessel. The feeding pipe is rotatably mounted on the inner wall of the preparation vessel. The motor is located at the lower end of the preparation vessel. The rotating rod is located on the inner wall of the preparation vessel. The receiving hopper is located at the upper end of the preparation vessel. The partition plate is fixedly installed on the inner wall of the preparation vessel. A feed pipe is provided at the side end of the preparation vessel. A vessel support is fixedly installed at the circumferential end of the preparation vessel. A conveying hole is opened at the lower end of the preparation vessel. The motor... A transmission rod is fixedly installed at the output end, and a transmission gear is fixedly installed at the circumferential end of the transmission rod. The transmission rod is rotatably mounted through the preparation vessel and the partition plate. The feeding pipe is fixedly installed on the transmission rod, and multiple dispensing pipes are fixedly installed at the circumferential end of the feeding pipe. A fixing ring is fixedly installed at the circumferential end of the dispensing pipe. A cap is fitted on the side end of the dispensing pipe. Multiple springs and telescopic rods are fixedly installed between the cap and the fixing ring. Each telescopic rod is located on the inner side wall of the spring. Two mounting columns are fixedly installed between the motor and the preparation vessel. The receiving hopper is fixedly installed at the upper end of the feeding pipe. A cover plate is provided at the upper end of the receiving hopper. A receiving interface is opened through the upper end of the cover plate. There are two rotating rods, and both rotating rods are rotatably mounted through the partition plate. A sealed bearing is provided between the two rotating rods and the partition plate.

[0009] Preferably, multiple stirring rods are fixedly installed at the circumferential ends of the two rotating rods.

[0010] Preferably, a reduction gear is fixedly installed at the circumferential end of each of the two rotating rods, and both reduction gears mesh with the transmission gear.

[0011] Compared with the prior art, the present invention has the following beneficial effects: In this invention, by combining a feeding pipe and a distributing pipe, the distributing pipes on the feeding pipe are distributed at different heights when the lime slurry is fed and mixed. The distributing pipes at different heights can use the inertia generated by the rotation of the feeding pipe to throw the lime slurry in the feeding pipe to different areas in the reactor. This can avoid the problem of local material accumulation that is easily caused by a fixed feeding pipe, and allow the lime slurry to come into more complete contact and fusion with the gas-liquid-solid three-phase system in the reactor, reducing the reaction imbalance caused by local material concentration differences.

[0012] In this invention, by employing a material distribution pipe, a cap, and a spring in combination, when lime slurry is being fed, the cap separates from the material distribution pipe under inertia, allowing the lime slurry to be discharged smoothly. When no material discharge is required, the spring's restoring force can cause the cap to tightly close the material distribution pipe. This design can prevent the material in the gas-liquid-solid three-phase system inside the preparation vessel from flowing back into the feeding pipe, avoiding problems such as blockage of the feeding pipe and raw material contamination caused by backflow, and ensuring stable operation of the equipment.

[0013] In this invention, by employing a transmission gear and a reduction gear in combination, the linkage between the transmission gear and the reduction gear ensures that the rotational speed of the connected rotating rod is lower than that of the feeding pipe. This satisfies the requirement of high-speed rotation of the feeding pipe to disperse materials, while reducing the stirring speed of the rotating rod. This reduces unnecessary energy consumption caused by excessive stirring, and at the same time avoids excessive shearing of the materials in the reactor caused by high-speed stirring, as well as the breakage of the bubbles participating in the reaction, thus ensuring a stable reaction environment for the gas-liquid-solid three-phase system.

[0014] In this invention, by providing a receiving hopper, a receiving interface, a storage box, and a conveying hole in combination, the receiving interface on the receiving hopper and the storage box will only be fed when the conveying hole and the receiving interface overlap. This intermittent feeding method can supply lime slurry in small amounts and multiple times, avoiding local reaction overload caused by feeding too much raw material at once, while reducing waste caused by excessive raw material that cannot react in time, improving raw material utilization, and also helping to maintain the stability of reaction conditions inside the reactor.

[0015] In this invention, a feeding pipe, a rotating rod, a receiving hopper, and a storage box are combined to achieve multiple functions through a single motor drive. While the motor drives the feeding pipe to rotate, it not only completes the uniform feeding of lime slurry but also drives the stirring rod to perform stirring and mixing operations, so that the feeding and mixing processes are carried out simultaneously. At the same time, the synchronous feeding and mixing further ensures that the lime slurry can be integrated into the gas-liquid-solid three-phase system in a timely and uniform manner, reducing the process interval of equipment operation, shortening the single production cycle, improving overall production efficiency, and improving mixing quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the preparation vessel of the present invention; Figure 2 This is a schematic cross-sectional view of the preparation vessel of the present invention; Figure 3 This is a schematic diagram of the structure of the storage box of the present invention; Figure 4 This is a schematic diagram of the material receiving hopper of the present invention; Figure 5 This is a schematic diagram of the structure of the motor of the present invention; Figure 6 This is a schematic diagram of the structure of the spacer plate of the present invention; Figure 7 This is a schematic diagram of the rotating rod of the present invention; Figure 8 This is a schematic diagram of the feeding tube of the present invention; Figure 9 This is the present invention. Figure 8 An enlarged schematic diagram of the structure at point A.

[0017] In the diagram, the correspondence between the component names and the attached drawing numbers is as follows: 1. Preparation vessel; 11. Feed pipe; 12. Vessel support; 2. Storage tank; 21. C-shaped upright; 22. Feeding hole; 3. Feeding pipe; 31. Distributing pipe; 32. Fixing ring; 34. Cap; 35. Spring; 36. Telescopic rod; 4. Motor; 41. Mounting column; 42. Transmission rod; 43. Transmission gear; 5. Rotating rod; 51. Stirring rod; 52. Reduction gear; 53. Sealed bearing; 6. Receiving hopper; 61. Cover plate; 62. Receiver; 7. Spacer plate. Detailed Implementation

[0018] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0019] Please see Figure 1 - Figure 9 This invention provides a high-efficiency preparation device for the ultrafine production of nano-calcium carbonate, including a preparation vessel 1. The preparation vessel 1 is equipped with a feeding mechanism for facilitating the addition of lime slurry. During the preparation of nano-calcium carbonate, a three-phase system consisting of carbon dioxide, unreacted water, and calcium carbonate is introduced into the preparation vessel 1. Lime slurry is used as the calcium source. In the initial stage of the reaction, CO2 gas first dissolves in the liquid phase of the lime slurry, forming H2CO3 and dissociating to release CO3. 2 ⁻, then CO3 2 ⁻Ca dissociates from Ca(OH)2 in lime milk 2 ⁺ A chemical reaction occurs in the liquid phase to generate CaCO3. The initially generated CaCO3 consists of extremely fine nanoscale crystal nuclei. At this time, the system maintains a three-phase state of gas, liquid, and solid. During the preparation process, stirring is required to enhance the mixing of the gas, liquid, and solid phases, improve the CO2 mass transfer efficiency and system uniformity, and at the same time, by controlling parameters such as reaction temperature, CO2 introduction rate, lime milk concentration, and the addition of dispersants, the further growth of CaCO3 crystal nuclei is inhibited, and finally, a nano-calcium carbonate product with uniform particle size and good dispersibility is obtained. The feeding mechanism includes a feeding pipe 3, a motor 4, a rotating rod 5, and a partition plate 7. The feeding mechanism also includes a storage tank 2 and a receiving hopper 6. The storage tank 2 is located at the upper end of the preparation vessel 1. A C-shaped upright 21 is fixedly installed between the storage tank 2 and the preparation vessel 1. The feeding pipe 3 is rotatably installed on the inner wall of the preparation vessel 1. The motor 4 is located at the lower end of the preparation vessel 1. The rotating rod 5 is located on the inner wall of the preparation vessel 1. The receiving hopper 6 is located at the upper end of the preparation vessel 1. The partition plate 7 is fixedly installed on the inner wall of the preparation vessel 1. A feed pipe 11 is provided at the side end of the preparation vessel 1. A vessel support 12 is fixedly installed at the circumferential end of the preparation vessel 1. A conveying hole 22 is opened at the lower end of the preparation vessel 1. A transmission rod 42 is fixedly installed at the output end of the motor 4. A transmission gear 43 is fixedly installed at the circumferential end of the drive rod 42. The drive rod 42 is rotatably mounted on the preparation vessel 1 and the partition plate 7. The feeding pipe 3 is fixedly installed on the drive rod 42. Multiple dispensing pipes 31 are fixedly installed at the circumferential end of the feeding pipe 3. A fixing ring 32 is fixedly installed at the circumferential end of the dispensing pipe 31. A cap 34 is sleeved on the side end of the dispensing pipe 31. Multiple springs 35 and telescopic rods 36 are fixedly installed between the cap 34 and the fixing ring 32. Each telescopic rod 36 is located on the inner side wall of the spring 35. Two mounting columns 41 are fixedly installed between the motor 4 and the preparation vessel 1. The receiving hopper 6 is fixedly installed at the upper end of the feeding pipe 3. A cover plate 61 is provided at the upper end of the receiving hopper 6. The upper end of the cover plate 61 is open. The reactor is equipped with a receiving port 62. During the reaction, lime slurry needs to be added into the preparation vessel 1. Stirring is required during the reaction of the lime slurry and the gas-liquid-solid three-phase system. The user can start the motor 4, which drives the transmission rod 42 to rotate. The rotation of the transmission rod 42 drives the feeding pipe 3 to rotate. The rotation of the feeding pipe 3 generates inertia, causing the cap 34 to shift due to inertia. At this time, the spring 35 is stretched, and the cap 34 no longer obstructs the dispensing pipe 31. The lime slurry solution in the feeding pipe 3 is then added into the preparation vessel 1 and mixed with the gas-liquid-solid three-phase system. Centrifugal force can be used to throw the lime slurry out from the discharge holes at different heights, dispersing it into micron-sized droplets or mist within the preparation vessel 1, uniformly covering the vessel. The internal space avoids uneven reaction caused by localized dispensing. When the transmission rod 42 rotates, it drives the transmission gear 43 to rotate. The rotation of the transmission gear 43 drives the two reduction gears 52 to rotate. The rotation of the reduction gears 52 drives the rotating rod 5 to rotate. The rotation of the rotating rod 5 drives the stirring rod 51 to rotate, thus mixing the lime slurry and the gas-liquid-solid three-phase system in the preparation vessel 1. With the cooperation of the transmission gear 43 and the reduction gear 52, the rotation speed of the rotating rod 5 is lower than that of the feeding pipe 3. The feeding pipe 3 rotates faster to achieve a high centrifugal rate. The cooperation of the transmission gear 43 and the reduction gear 52 can reduce the rotation speed of the rotating rod 5, avoiding problems such as excessive energy consumption, excessive shearing of materials, or bubble breakage caused by excessively fast mixing rotation. There are two rotating rods 5, both of which are rotatably mounted on the partition plate 7. Sealed bearings 53 are provided between the two rotating rods 5 and the partition plate 7. Multiple stirring rods 51 are fixedly mounted on the circumferential ends of the two rotating rods 5. Reduction gears 52 are also fixedly mounted on the circumferential ends of the two rotating rods 5, and both reduction gears 52 mesh with transmission gears 43. When the feeding pipe 3 rotates, it drives the receiving hopper 6 to rotate. A valve body is provided between the bottom of the receiving hopper 6 and the feeding pipe 3 to receive material. The rotation of hopper 6 will cause the cover plate 61 to rotate. The cover plate 61 is provided with a receiving interface 62. When the cover plate 61 and the receiving interface 62 overlap, the lime slurry in the storage box 2 will enter the receiving hopper 6 through the conveying hole 22 and the receiving interface 62. It will then be transferred to the feeding pipe 3 through the receiving hopper 6. When lime slurry needs to be added to the feeding pipe 3, the valve body at the bottom of the receiving hopper 6 can be opened to connect the feeding pipes 3 of the receiving hopper 6. The rotation of the receiving hopper 6 will cause the conveying holes 22 of the receiving interface 62 to overlap, so as to achieve continuous feeding.

[0020] Working principle: In the first step of preparing nano-calcium carbonate, a three-phase system consisting of carbon dioxide, unreacted water, and calcium carbonate is introduced into preparation vessel 1. Lime slurry is used as the calcium source. In the initial stage of the reaction, CO2 gas first dissolves in the liquid phase of the lime slurry to form H2CO3 and then dissociates into CO3. 2 ⁻, then CO3 2 ⁻Ca dissociates from Ca(OH)2 in lime milk 2 ⁺ A chemical reaction occurs in the liquid phase to generate CaCO3. The initially generated CaCO3 consists of extremely fine nanoscale crystal nuclei. At this point, the system maintains a three-phase state of gas, liquid, and solid. During the preparation process, stirring is required to enhance the mixing of the gas, liquid, and solid phases, improve the CO2 mass transfer efficiency and system uniformity, and at the same time, by controlling parameters such as reaction temperature, CO2 introduction rate, lime milk concentration, and the addition of dispersants, the further growth of CaCO3 crystal nuclei is inhibited, and finally, a nano-calcium carbonate product with uniform particle size and good dispersibility is obtained.

[0021] The second step involves adding lime slurry into the preparation vessel 1 during the reaction. Stirring is required during the reaction of the lime slurry and the gas-liquid-solid three-phase system. The user can start the motor 4, which will drive the transmission rod 42 to rotate. The rotation of the transmission rod 42 will drive the feeding pipe 3 to rotate. The rotation of the feeding pipe 3 generates inertia, causing the cap 34 to shift due to inertia. At this time, the spring 35 is stretched, and the cap 34 no longer obstructs the dispensing pipe 31. The lime slurry solution in the feeding pipe 3 will then be added into the preparation vessel 1 and mixed with the gas-liquid-solid three-phase system. Centrifugal force can then propel the lime slurry out of the discharge holes at different heights, dispersing it into micron-sized droplets or mist within the preparation vessel 1, uniformly covering the interior. To avoid uneven reaction caused by localized addition, the rotation of the transmission rod 42 drives the transmission gear 43 to rotate, which in turn drives two reduction gears 52 to rotate. The rotation of the reduction gears 52 drives the rotating rod 5 to rotate, which in turn drives the stirring rod 51 to rotate. This mixes the lime slurry and the gas-liquid-solid three-phase system in the preparation vessel 1. With the cooperation of the transmission gear 43 and the reduction gears 52, the rotation speed of the rotating rod 5 is lower than that of the feeding pipe 3. The feeding pipe 3 rotates at a relatively high speed to achieve a high centrifugal rate. The cooperation of the transmission gear 43 and the reduction gears 52 reduces the rotation speed of the rotating rod 5, avoiding problems such as excessive energy consumption, excessive shearing of materials, or breakage of bubbles caused by excessively fast mixing rotation. This device uses a combination of a feeding pipe 3 and a distributing pipe 31. When feeding and mixing lime slurry, the distributing pipes 31 on the feeding pipe 3 are distributed at different heights. The distributing pipes 31 at different heights can use the inertia generated by the rotation of the feeding pipe 3 to throw the lime slurry in the feeding pipe 3 to different areas in the reactor. This can avoid the problem of local material accumulation that is easily caused by a fixed feeding pipe, and allow the lime slurry to come into more full contact and fuse with the gas-liquid-solid three-phase system in the reactor, reducing the reaction imbalance caused by local material concentration differences. This device uses a combination of a material distribution pipe 31, a cap 34, and a spring 35. When lime slurry is being fed, the cap 34 separates from the material distribution pipe 31 due to inertia, allowing the lime slurry to be discharged smoothly. When no material is needed, the restoring force of the spring 35 can cause the cap 34 to tightly close the material distribution pipe 31. This design can prevent the material in the gas-liquid-solid three-phase system in the preparation vessel 1 from flowing back into the feeding pipe 3, avoiding problems such as blockage of the feeding pipe and contamination of raw materials caused by backflow, and ensuring stable operation of the equipment. This device uses a transmission gear 43 and a reduction gear 52 in combination. The linkage between the transmission gear 43 and the reduction gear 52 makes the rotation speed of the connected rotating rod 5 lower than that of the feeding pipe 3. This satisfies the need for the feeding pipe 3 to rotate at high speed to disperse materials, while reducing the stirring speed of the rotating rod 5. This reduces unnecessary energy consumption caused by excessive stirring, and avoids excessive shearing of the materials in the reactor by high-speed stirring, as well as breakage of the bubbles participating in the reaction, thus ensuring a stable reaction environment for the gas-liquid-solid three-phase system. Thirdly, when the feeding pipe 3 rotates, it will drive the receiving hopper 6 to rotate. A valve body is provided between the bottom of the receiving hopper 6 and the feeding pipe 3. The rotation of the receiving hopper 6 will drive the cover plate 61 to rotate. The cover plate 61 is provided with a receiving interface 62. When the cover plate 61 and the receiving interface 62 overlap, the lime slurry in the storage box 2 will enter the receiving hopper 6 through the conveying hole 22 and the receiving interface 62. It will then be transferred to the feeding pipe 3 through the receiving hopper 6. When lime slurry needs to be added to the feeding pipe 3, the valve body at the bottom of the receiving hopper 6 can be opened to connect the feeding pipes 3 of the receiving hopper 6. By rotating the receiving hopper 6, the conveying holes 22 of the receiving interface 62 will overlap, so as to achieve continuous feeding. This device is equipped with a receiving hopper 6, a receiving port 62, a storage box 2, and a conveying hole 22. The receiving port 62 on the receiving hopper 6 and the storage box 2 will only be fed when the conveying hole 22 and the receiving port 62 overlap. This intermittent feeding method can supply lime slurry in small amounts and multiple times, avoiding local reaction overload caused by feeding too much raw material at once. At the same time, it reduces waste caused by excessive raw material that cannot react in time, improves raw material utilization, and also helps to maintain the stability of reaction conditions inside the reactor. This device, through the coordinated arrangement of a feeding pipe 3, a rotating rod 5, a receiving hopper 6, and a storage box 2, achieves multiple functions driven by a single motor 4. While the motor 4 drives the feeding pipe 3 to rotate, it not only completes the uniform feeding of lime slurry but also drives the stirring rod 51 to perform stirring and mixing operations, enabling the feeding and mixing processes to be carried out simultaneously. At the same time, the synchronous feeding and mixing further ensures that the lime slurry can be integrated into the gas-liquid-solid three-phase system in a timely and uniform manner, reducing the process interval of equipment operation, shortening the single production cycle, improving overall production efficiency, and enhancing mixing quality.

[0022] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A high-efficiency preparation device for the ultrafine production of nano-calcium carbonate, comprising a preparation vessel (1), characterized in that: The preparation vessel (1) is provided with a feeding mechanism to facilitate the feeding of lime slurry, and the preparation vessel (1) is provided with a feeding mechanism to facilitate the feeding of materials during the preparation of nano-calcium carbonate; The feeding mechanism includes a feeding pipe (3), a motor (4), a rotating rod (5), and a partition plate (7). The feeding mechanism includes a storage box (2) and a receiving hopper (6). The storage box (2) is located at the upper end of the preparation vessel (1). A C-shaped upright (21) is fixedly installed between the storage box (2) and the preparation vessel (1). The feeding pipe (3) is rotatably installed on the inner wall of the preparation vessel (1). The motor (4) is located at the lower end of the preparation vessel (1). The rotating rod (5) is located on the inner wall of the preparation vessel (1). The receiving hopper (6) is located at the upper end of the preparation vessel (1). The partition plate (7) is fixedly installed on the inner wall of the preparation vessel (1).

2. The high-efficiency preparation device for ultrafine nano-calcium carbonate production as described in claim 1, characterized in that, The preparation vessel (1) is provided with a feed pipe (11) at its side end, and a vessel support (12) is fixedly installed at the circumferential end of the preparation vessel (1).

3. The high-efficiency preparation device for ultrafine nano-calcium carbonate production as described in claim 2, characterized in that, The lower end of the preparation vessel (1) is provided with a material conveying hole (22), and the output end of the motor (4) is fixedly installed with a transmission rod (42), and the circumferential end of the transmission rod (42) is fixedly installed with a transmission gear (43).

4. The high-efficiency preparation device for ultrafine nano-calcium carbonate production as described in claim 3, characterized in that, The transmission rod (42) is rotatably mounted through the preparation vessel (1) and the spacer plate (7), and the feeding pipe (3) is fixedly mounted on the transmission rod (42).

5. The high-efficiency preparation device for ultrafine nano-calcium carbonate production as described in claim 4, characterized in that, The feeding pipe (3) has multiple material dispensing pipes (31) fixedly installed at its circumferential end. The material dispensing pipe (31) has a fixed ring (32) fixedly installed at its circumferential end. The material dispensing pipe (31) has a cap (34) sleeved on its side end.

6. The high-efficiency preparation apparatus for ultrafine nano-calcium carbonate production as described in claim 5, characterized in that, A plurality of springs (35) and telescopic rods (36) are fixedly installed between the cap (34) and the fixing ring (32), and each of the telescopic rods (36) is located on the inner sidewall of the spring (35).

7. The high-efficiency preparation apparatus for the ultrafine production of nano-calcium carbonate as described in claim 6, characterized in that, Two mounting columns (41) are fixedly installed between the motor (4) and the preparation vessel (1). The receiving hopper (6) is fixedly installed at the upper end of the feeding pipe (3). The upper end of the receiving hopper (6) is provided with a cover plate (61), and the upper end of the cover plate (61) is provided with a receiving interface (62).

8. The high-efficiency preparation apparatus for the ultrafine production of nano-calcium carbonate as described in claim 7, characterized in that, There are two rotating rods (5), both of which are rotatably mounted on the spacer plate (7), and a sealed bearing (53) is provided between the two rotating rods (5) and the spacer plate (7).

9. The high-efficiency preparation apparatus for ultrafine nano-calcium carbonate production as described in claim 8, characterized in that, Multiple stirring rods (51) are fixedly installed at the circumferential ends of the two rotating rods (5).

10. The high-efficiency preparation apparatus for the ultrafine production of nano-calcium carbonate as described in claim 9, characterized in that, Both rotating rods (5) have reduction gears (52) fixedly installed at their circumferential ends, and both reduction gears (52) mesh with the transmission gears (43).

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