Device and method for preparing nanoscale ultrafine powder

Abstract

The invention provides a device and a method for preparing nanoscale ultrafine powder, and relates to the technical field of calcium particle preparation, the device comprises a solid-gas mixing cylinder body, a positive voltage cylinder, a negative voltage cylinder and a positive and negative ion impact tube; the solid-gas mixing cylinder body is provided with a material inlet, and the material inlet is used for inputting animal skeleton coarse particles and oxygen to form solid-gas mixed gas flow; the solid-gas mixing cylinder body is respectively communicated with the positive voltage cylinder and the negative voltage cylinder; the positive voltage cylinder ionizes oxygen in the solid-gas mixed gas flow into a positive ion state, and the negative voltage cylinder ionizes oxygen in the solid-gas mixed gas flow into a negative ion state; a positive-voltage cylinder is communicated with a discharge port of a negative-voltage cylinder, a solid-gas mixed gas flow with a positive ion state and a solid-gas mixed gas flow with a negative ion state converge at the discharge port and enter a positive-negative ion impact pipe, and the solid-gas mixed gas flow with the positive ion state and the solid-gas mixed gas flow with the negative ion state generate strong impact in the positive-negative ion impact pipe; a large amount of energy released when the positive and negative ions are combined crushes the animal skeleton coarse particles into ultrafine powder.

Description

Technical Field

[0001] The present invention relates to the technical field of calcium particle preparation, and particularly to a device and method for preparing nanoscale ultrafine powder. Background Art

[0002] Calcium is an important element in the human body, and 99% of the calcium in the human body is present in bones and teeth. Generally speaking, before the age of 35, the absorption rate of calcium in the human body is greater than the loss rate, and after the age of 35, the loss rate is greater than the absorption rate. With the loss of calcium, symptoms such as "osteoporosis" will appear. In order to relieve these symptoms, it is necessary to supplement some calcium-rich foods or drugs, so various calcium tablets have emerged. The traditional calcium source is mainly calcium carbonate (the main component of limestone). It has been proved by experiments that taking calcium carbonate for a long time has an irreversible impact on the renal tubules and may cause kidney stones. Decomposing animal bones into nanoscale ultrafine powder to obtain particles of hydroxyapatite (HAP) with a size of 3-9 nanometers can be fully absorbed by the body and has good biological activity.

[0003] At present, the preparation methods of calcium tablets include chemical methods and physical methods.

[0004] The chemical method uses calcium carbonate (the main component of limestone) as the main raw material to react with other compounds under the action of a catalyst to obtain a mixture mainly composed of hydroxyapatite, and then purifies it. The calcium tablets prepared by the chemical method contain other substances that the human body does not need or is harmful to the human body, no matter how high the purity is. Since it is made of minerals, it does not have the biological activity to combine with the human body.

[0005] The physical method uses calcium-rich organic substances such as animal bones, corals or shells, and obtains fine particles through physical methods such as crushing and grinding, and then makes the fine particles into calcium tablets. At present, the particle size prepared by the physical method can only reach 100 nanometers, and the human body absorption rate is low. Summary of the Invention

[0006] In view of the above deficiencies of the prior art, the purpose of the embodiments of the present invention is to provide a device and method for preparing nanoscale ultrafine powder, which can solve the technical problem that the active bio-calcium particles prepared by the physical method in the prior art can only reach 100 nanometers and the human body absorption rate is low.

[0007] In the first aspect of the embodiments of the present invention, a device for preparing nanoscale ultrafine powder is proposed, including: a solid-gas mixing cylinder, a positive voltage cylinder, a negative voltage cylinder, a positive and negative ion impact tube, and a centrifuge;

[0008] The solid-gas mixing cylinder is provided with a feeding port, and the feeding port is used to input coarse animal bone particles and oxygen to form a solid-gas mixed air flow;

[0009] The solid-gas mixing cylinder body is respectively communicated with the positive voltage cylinder and the negative voltage cylinder;

[0010] The positive voltage cylinder ionizes the oxygen in the solid-gas mixed gas flow into a positive ion state, and the negative voltage cylinder ionizes the oxygen in the solid-gas mixed gas flow into a negative ion state;

[0011] The positive voltage cylinder is communicated with the discharge port of the negative voltage cylinder. The solid-gas mixed gas flow with a positive ion state and the solid-gas mixed gas flow with a negative ion state converge at the discharge port and enter the positive and negative ion impact tube. In the positive and negative ion impact tube, the solid-gas mixed gas flow with a positive ion state and the solid-gas mixed gas flow with a negative ion state undergo a strong impact. A large amount of energy released when the positive and negative ions combine pulverizes the coarse animal bone particles into ultrafine powder;

[0012] The positive and negative ion impact tube is communicated with the centrifuge. The centrifuge is provided with a recovery port and a discharge port. The recovery port is communicated with the solid-gas mixing cylinder body through the coarse particle recovery tube;

[0013] The centrifuge screens the ultrafine powder. When the particle size of the ultrafine powder is less than or equal to the preset size, the ultrafine powder flows out through the discharge port. When the particle size of the ultrafine powder is greater than the preset size, the ultrafine powder re-enters the solid-gas mixing cylinder body through the coarse particle recovery tube for pulverization.

[0014] In the second aspect of the embodiment of the present invention, a method for preparing nano-scale ultrafine powder is proposed, which is applied to the above-mentioned nano-scale ultrafine powder preparation device, and includes:

[0015] S1: Using high-pressure air flow, input the coarse animal bone particles and oxygen from the feed port into the solid-gas mixing cylinder body;

[0016] S2: Fully mix the coarse animal bone particles and oxygen to form a solid-gas mixed gas flow;

[0017] S3: Input the solid-gas mixed gas flow into the positive voltage cylinder and the negative voltage cylinder respectively;

[0018] S4: Ionize the oxygen in the solid-gas mixed gas flow into a positive ion state through the positive voltage cylinder, and ionize the oxygen in the solid-gas mixed gas flow into a negative ion state through the negative voltage cylinder;

[0019] S5: The solid-gas mixed gas flow with a positive ion state and the solid-gas mixed gas flow with a negative ion state undergo a strong impact in the positive and negative ion impact tube. A large amount of energy released when the positive and negative ions combine pulverizes the coarse animal bone particles into ultrafine powder;

[0020] S6: Screen the ultrafine powder through a centrifuge. When the particle size of the ultrafine powder is less than or equal to a preset size, the ultrafine powder flows out through the discharge port. When the particle size of the ultrafine powder is greater than the preset size, the ultrafine powder re-enters the solid-gas mixing cylinder through the coarse particle recovery pipe for pulverization.

[0021] The beneficial effects brought by the technical solutions provided in the embodiments of the present invention at least include:

[0022] In the embodiments of the present invention, through the strong impact of the solid-gas mixed air flow in the positive ion state and the solid-gas mixed air flow in the negative ion state, a large amount of energy released when the positive and negative ions combine pulverizes the coarse particles of animal bones into finer ultrafine powder, improving the human absorption rate of calcium particles. Description of the Drawings

[0023] The drawings are only for the purpose of showing specific embodiments and are not considered as a limitation of the present invention. Throughout the drawings, the same reference signs denote the same components. Obviously, the drawings in the following description are only some embodiments described in the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a schematic structural diagram of a preparation device for nano-scale ultrafine powder provided by an embodiment of the present invention;

[0025] Figure 2 is a scanning electron microscope observation diagram of a nano-scale ultrafine powder provided by an embodiment of the present invention;

[0026] Figure 3 is a schematic flow diagram of a preparation method for nano-scale ultrafine powder provided by an embodiment of the present invention.

[0027] Description of the reference signs in the drawings: 1 - solid-gas mixing cylinder; 2 - positive voltage cylinder; 3 - negative voltage cylinder; 4 - positive and negative ion impact tube; 5 - centrifuge. Detailed Embodiments

[0028] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. It should be understood that these descriptions are only exemplary and are not used to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts disclosed in the present invention.

[0030] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

[0031] Refer to the attached Figure 1 drawings, which show a schematic structural diagram of a preparation device for nano-scale ultrafine powder provided by an embodiment of the present invention.

[0032] A preparation device for nano-scale ultrafine powder provided by an embodiment of the present invention includes: a solid-gas mixing cylinder 1, a positive voltage cylinder 2, a negative voltage cylinder 3, a positive and negative ion impact tube 4, and a centrifuge 5.

[0033] The solid-gas mixing cylinder 1 is provided with a feed inlet, and the feed inlet 11 is used for inputting animal bone coarse particles and oxygen to form a solid-gas mixed gas flow.

[0034] The solid-gas mixing cylinder 1 is respectively communicated with the positive voltage cylinder 2 and the negative voltage cylinder 3.

[0035] The positive voltage cylinder 2 ionizes the oxygen in the solid-gas mixed gas flow into a positive ion state, and the negative voltage cylinder 3 ionizes the oxygen in the solid-gas mixed gas flow into a negative ion state.

[0036] The discharge port of the positive voltage cylinder 2 is communicated with the discharge port of the negative voltage cylinder 3. The solid-gas mixed gas flow with a positive ion state and the solid-gas mixed gas flow with a negative ion state converge at the discharge port and enter the positive and negative ion impact tube 4. In the positive and negative ion impact tube 4, the solid-gas mixed gas flow with a positive ion state and the solid-gas mixed gas flow with a negative ion state undergo a strong impact. A large amount of energy released when the positive and negative ions combine pulverizes the animal bone coarse particles into ultrafine powder.

[0037] The positive and negative ion impact tube 4 is communicated with the centrifuge 5. The centrifuge 5 is provided with a recovery port and a discharge port. The recovery port is communicated with the solid-gas mixing cylinder 1 through the coarse particle recovery tube.

[0038] The centrifuge 5 screens the ultrafine powder. When the particle size of the ultrafine powder is less than or equal to a preset size, the ultrafine powder flows out through the discharge port. When the particle size of the ultrafine powder is greater than the preset size, the ultrafine powder re-enters the solid-gas mixing cylinder 1 through the coarse particle recovery tube for pulverization.

[0039] Among them, those skilled in the art can set the size of the preset size according to the actual situation, and the present invention does not make a limitation. Optionally, the preset size is specifically 9 nm.

[0040] The beneficial effects brought by the technical solution provided by the embodiment of the present invention at least include:

[0041] In the embodiment of the present invention, through the strong impact of the solid-gas mixed air flow in the positive ion state and the solid-gas mixed air flow in the negative ion state, a large amount of energy released when the positive and negative ions combine pulverizes the coarse particles of animal bones into finer ultrafine powder, improving the human absorption rate of calcium particles.

[0042] In a possible implementation manner, the volume ratio of the coarse particles of animal bones input into the feed inlet of the solid-gas mixing cylinder body 1 to the oxygen is 1:3.

[0043] It should be noted that the number of hydroxyapatite HAP molecules on the surface of 1 volume of 100-nanometer-level coarse particles is basically the same as the number of 3 volumes of oxygen molecules, which can make full use of the efficiency of the combination of positive and negative ions. If the oxygen ratio is too high, the capacity of the cylinder body becomes larger and the cost is too high; if the oxygen ratio is too low, the proportion of hydroxyapatite on the surface of the coarse particles being torn is small and the efficiency becomes low.

[0044] Optionally, the solid-gas mixing cylinder body 1 is made of insulating and high-voltage-resistant silicone rubber material.

[0045] Optionally, the flow rate of the solid-gas mixed air flow input into the feed inlet of the solid-gas mixing cylinder body 1 is greater than 10 m / s.

[0046] Optionally, the positive voltage cylinder 2 and the negative voltage cylinder 3 have the same pipe diameter.

[0047] Optionally, the pipe diameters of the positive voltage cylinder 2 and the negative voltage cylinder 3 are one-fourth of the diameter of the feed inlet 11.

[0048] It should be noted that by reducing the pipe diameters of the positive voltage cylinder 2 and the negative voltage cylinder 3 compared with the diameter of the feed inlet 11, the flow rate of the solid-gas mixed air flow can be increased.

[0049] Optionally, the flow rate of the solid-gas mixed air flow in the discharge ports of the positive voltage cylinder 2 and the negative voltage cylinder 3 is greater than 40 m / s.

[0050] Optionally, the device for preparing nano-level ultrafine powder further includes: a transformer and a rectifier.

[0051] The transformer boosts 220V alternating current to 220kV alternating current. The transformer is electrically connected to the rectifier, and the rectifier rectifies 220kV alternating current into 220kV direct current. The positive pole of the rectifier is connected to the tungsten electrode of the positive voltage cylinder 2, and the negative pole of the rectifier is connected to the graphite electrode of the negative voltage cylinder 3.

[0052] Optionally, the angle between the discharge ports of the positive voltage cylinder 2 and the negative voltage cylinder 3 is 90 degrees.

[0053] Optionally, the included angles between the discharge ports of the positive voltage cylinder 2 and the negative voltage cylinder 3 and the horizontal line are both 45 degrees, so that the angle between the discharge ports of the positive voltage cylinder 2 and the negative voltage cylinder 3 is 90 degrees.

[0054] It should be noted that when the solid-gas mixed gas flow with positive ion state and the solid-gas mixed gas flow with negative ion state collide at 90 degrees, the impact force generated by the combination of positive and negative ions can be fully utilized, and at the same time, no reaction force will be generated.

[0055] Refer to the attached Figure 2 description, which shows a scanning electron microscope observation image of a nano-scale ultrafine powder provided by an embodiment of the present invention.

[0056] Using an SU8010 type scanning electron microscope with an acceleration voltage of 5.0 KV, the sample is the nano-scale ultrafine powder collected at the discharge port. The distance from the sample to the objective aperture is 14.0 mm, and the magnification is 18,000 times for the secondary electron image. According to the secondary electron imaging principle, the secondary electron yield of the protruding part is high. The sample particles protrude from the surface, so they appear as bright images in the secondary electron image, especially at the edges of the particles.

[0057] As Figure 2 shown, the particle size distribution of the sample is relatively uniform, and the particle size is between 3 nm and 9 nm. There are individual particles with larger sizes, which is due to the agglomeration effect of nano-scale particles.

[0058] Refer to the attached Figure 3 description, which shows a schematic flow chart of a preparation method of a nano-scale ultrafine powder provided by an embodiment of the present invention.

[0059] A preparation method of a nano-scale ultrafine powder provided by an embodiment of the present invention is applied to the above-mentioned preparation device for nano-scale ultrafine powder, and includes:

[0060] S1: Using high-pressure air flow, input animal bone coarse particles and oxygen from the feed inlet into the solid-gas mixing cylinder.

[0061] S2: Fully mix the animal bone coarse particles and oxygen to form a solid-gas mixed gas flow.

[0062] S3: Input the solid-gas mixed airflow into the positive voltage cylinder and the negative voltage cylinder respectively.

[0063] S4: Ionize the oxygen in the solid-gas mixed airflow into positive ion state through the positive voltage cylinder, and ionize the oxygen in the solid-gas mixed airflow into negative ion state through the negative voltage cylinder.

[0064] S5: The solid-gas mixed airflow with positive ion state and the solid-gas mixed airflow with negative ion state collide strongly in the positive and negative ion impact tube. A large amount of energy released when the positive and negative ions combine pulverizes the coarse animal bone particles into ultrafine powder.

[0065] S6: Screen the ultrafine powder through a centrifuge. When the particle size of the ultrafine powder is less than or equal to the preset size, the ultrafine powder flows out through the discharge port. When the particle size of the ultrafine powder is greater than the preset size, the ultrafine powder re-enters the solid-gas mixing cylinder through the coarse particle recovery pipe for pulverization.

[0066] The beneficial effects brought by the technical solution provided in the embodiments of the present invention at least include:

[0067] In the embodiments of the present invention, through the strong collision of the solid-gas mixed airflow with positive ion state and the solid-gas mixed airflow with negative ion state, a large amount of energy released when the positive and negative ions combine pulverizes the coarse animal bone particles into finer ultrafine powder, improving the human absorption rate of calcium particles.

[0068] The present invention covers any substitutions, modifications, equivalent methods and solutions made on the essence and scope of the present invention. For the public to have a thorough understanding of the present invention, specific details are described in detail in the preferred embodiments of the present invention. However, those skilled in the art can also fully understand the present invention without these detailed descriptions. In addition, in order to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A preparation device for nanoscale ultrafine powder, characterized in that, Comprising: A solid-gas mixing cylinder body, a positive voltage cylinder, a negative voltage cylinder, a positive and negative ion impact tube, and a centrifuge; The solid-gas mixing cylinder body is provided with a feed inlet, and the feed inlet is used for inputting coarse animal bone particles and oxygen to form a solid-gas mixed air flow; The solid-gas mixing cylinder body is respectively communicated with the positive voltage cylinder and the negative voltage cylinder; The positive voltage cylinder ionizes the oxygen in the solid-gas mixed air flow into a positive ion state, and the negative voltage cylinder ionizes the oxygen in the solid-gas mixed air flow into a negative ion state; The discharge port of the positive voltage cylinder is communicated with the discharge port of the negative voltage cylinder. The solid-gas mixed air flow with a positive ion state and the solid-gas mixed air flow with a negative ion state converge at the discharge port and enter the positive and negative ion impact tube. In the positive and negative ion impact tube, the solid-gas mixed air flow with a positive ion state and the solid-gas mixed air flow with a negative ion state undergo a strong impact. A large amount of energy released when the positive and negative ions combine pulverizes the coarse animal bone particles into ultrafine powder; The positive and negative ion impact tube is communicated with the centrifuge. The centrifuge is provided with a recovery port and a discharge port. The recovery port is communicated with the solid-gas mixing cylinder body through the coarse particle recovery tube; The centrifuge screens the ultrafine powder. When the particle size of the ultrafine powder is less than or equal to a preset size, the ultrafine powder flows out through the discharge port. When the particle size of the ultrafine powder is greater than the preset size, the ultrafine powder re-enters the solid-gas mixing cylinder body through the coarse particle recovery tube for pulverization.

2. The preparation device for the nano-level ultrafine powder according to claim 1, characterized in that, The volume ratio of the coarse animal bone particles to the oxygen input into the feed inlet of the solid-gas mixing cylinder body is 1:

3.

3. The preparation device of the nanoscale ultrafine powder according to claim 1, characterized in that, The flow rate of the solid-gas mixed air flow input into the feed inlet of the solid-gas mixing cylinder body is greater than 10 m / s.

4. The preparation device for nanoscale ultrafine powder according to claim 1, wherein The diameters of the positive voltage cylinder and the negative voltage cylinder are the same.

5. The preparation device of the nano-level ultrafine powder according to claim 1, characterized in that, The diameters of the positive voltage cylinder and the negative voltage cylinder are one-fourth of the diameter of the feed inlet.

6. The preparation device for nanoscale ultrafine powder according to claim 1, characterized in that, The flow rate of the solid-gas mixed air flow in the discharge ports of the positive voltage cylinder and the negative voltage cylinder is greater than 40 m / s.

7. The preparation device of the nano-scale ultrafine powder according to claim 1, characterized in that, Also comprising: A transformer and a rectifier; The transformer boosts 220V alternating current to 220kV alternating current. The transformer is electrically connected to the rectifier. The rectifier rectifies 220kV alternating current into 220kV direct current. The positive electrode of the rectifier is connected to the tungsten electrode of the positive voltage cylinder, and the negative electrode of the rectifier is connected to the graphite electrode of the negative voltage cylinder.

8. The preparation device for the nanoscale ultrafine powder according to claim 1, characterized in that, The angle between the discharge ports of the positive voltage cylinder and the negative voltage cylinder is 90 degrees.

9. The preparation device for nanoscale ultrafine powder according to claim 1, characterized in that, The preset size is specifically 9 nm.

10. A preparation method of a nano-level ultrafine powder, applied to the preparation device of the nano-level ultrafine powder described in any one of claims 1 to 9, characterized in that, Comprising: S1: Using high-pressure air flow, inputting coarse animal bone particles and oxygen from the feed inlet into the solid-gas mixing cylinder body; S2: Fully mixing the coarse animal bone particles and oxygen to form a solid-gas mixed air flow; S3: Inputting the solid-gas mixed air flow into the positive voltage cylinder and the negative voltage cylinder respectively; S4: Ionizing the oxygen in the solid-gas mixed air flow into a positive ion state through the positive voltage cylinder, and ionizing the oxygen in the solid-gas mixed air flow into a negative ion state through the negative voltage cylinder; S5: The solid-gas mixed airflow with positive ion state and the solid-gas mixed airflow with negative ion state strongly collide in the positive and negative ion impact tube. A large amount of energy released when the positive and negative ions combine pulverizes the coarse animal bone particles into ultrafine powder. S6: The ultrafine powder is screened by a centrifuge. When the particle size of the ultrafine powder is less than or equal to the preset size, the ultrafine powder flows out through the discharge port. When the particle size of the ultrafine powder is greater than the preset size, the ultrafine powder re-enters the solid-gas mixing cylinder through the coarse particle recovery pipe for pulverization.

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