Multi-stage stirring blade mechanism and nano calcium carbonate coating reaction equipment

Abstract

The utility model discloses a multi-stage stirring blade mechanism and nano calcium carbonate coating reaction equipment, and relates to the technical field of nano calcium carbonate preparation, and the multi-stage stirring blade mechanism comprises a stirring barrel and a stirring rod, the secondary stirring mechanism comprises a moving block, a lifting disc is arranged on the moving block, the lifting disc is connected with the stirring barrel, a spraying head is arranged at the bottom of the lifting disc, a reciprocating spiral groove is formed in the peripheral surface of a stirring rod, and an abutting ball is arranged on the inner wall of the moving block; the liquid supplementing mechanism comprises a liquid extracting box, and the lifting disc is in sliding connection with the liquid extracting box; the slurry is stirred by the stirring blades, gas introduced from the bottom is smashed, the reaction rate is increased, the lifting disc is driven by the stirring rod to ascend and descend, so that the slurry at the bottom is extruded into the buffer cavity and sprayed out from the spraying head to be in contact reaction with the gas, and when the lifting disc moves downwards, the gas is compressed, so that the gas concentration is increased; further, the sprayed slurry is fully contacted and reacted with the gas.

Description

Technical Field

[0001] This utility model relates to the field of nano-calcium carbonate preparation technology, specifically to a multi-stage stirring blade mechanism and nano-calcium carbonate coating reaction equipment. Background Technology

[0002] Nano-calcium carbonate coating is a surface treatment technique for nano-calcium carbonate particles, designed to improve their properties and broaden their applications in various fields. Nano-calcium carbonate coating involves uniformly covering the surface of nano-calcium carbonate particles with one or more layers of other substances, commonly referred to as coating agents or surface modifiers. Due to their small particle size, large specific surface area, and high surface energy, nano-calcium carbonate particles are prone to aggregation and exhibit poor compatibility with other components in some application systems. Through coating treatment, utilizing the interaction between the coating agent and the surface of nano-calcium carbonate, such as chemical bonding and physical adsorption, a protective film is formed on the surface, thereby altering the surface properties of the nano-calcium carbonate. This mainly includes wet coating and dry coating methods.

[0003] Wet coating involves suspending nano-calcium carbonate in water or other solvents, adding an appropriate amount of coating agent, and then using methods such as stirring and ultrasound to ensure the coating agent is uniformly adsorbed onto the surface of the nano-calcium carbonate particles. This method offers good coating results and high particle dispersibility.

[0004] When preparing nano-calcium carbonate suspension, stirring is required to ensure that the calcium hydroxide slurry is mixed evenly with the introduced carbon dioxide and nitrogen gas, so that the reaction can proceed fully and generate a uniform nano-calcium carbonate suspension. In the existing technology, carbon dioxide and nitrogen gas are usually introduced into the calcium hydroxide slurry from the bottom of the stirring device for stirring and reaction. However, since carbon dioxide and other gases will quickly float to the surface after being introduced from the bottom of the liquid, the floating carbon dioxide gas accumulates on the top of the liquid and is difficult to mix and react with the slurry below, which reduces the preparation efficiency and wastes carbon dioxide and other gases. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage stirring blade mechanism and a nano-calcium carbonate coating reaction device to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage stirring blade mechanism, including a stirring cylinder, a stirring rod rotatably disposed inside the stirring cylinder, and a primary stirring mechanism fixedly disposed at the bottom of the stirring rod; a secondary stirring mechanism, including a moving block, a lifting plate fixedly disposed on the moving block, the lifting plate being slidably connected to the inner wall of the stirring cylinder, the lifting plate having a buffer cavity, a plurality of spray heads fixedly disposed at the bottom of the lifting plate, a reciprocating spiral groove being formed on the outer circumferential surface of the stirring rod, and an abutment ball adapted to the reciprocating spiral groove being fixedly disposed on the inner wall of the moving block; and a liquid replenishment mechanism, including a liquid lifting box rotatably disposed on the stirring rod, the lifting plate being slidably connected to the liquid lifting box.

[0007] Preferably, the primary stirring mechanism includes multiple stirring blades fixedly disposed at the bottom of the stirring rod.

[0008] Preferably, a rotating disk is fixedly installed on the stirring rod, a first telescopic tube is fixedly installed between the rotating disk and the moving block, and a second telescopic tube is fixedly installed between the moving block and the extraction tank.

[0009] Preferably, the stirring rod has a lifting groove inside, a one-way valve is fixedly installed at the bottom of the lifting groove, and two water outlets connected to the lifting groove are opened at the top of the stirring rod.

[0010] Preferably, the extraction tank has two connecting pipes fixedly connected to it, and each connecting pipe is fixedly connected to an inner sleeve at the end away from the extraction tank. An outer sleeve is slidably provided on the outer circumference of each inner sleeve, and each outer sleeve is fixedly connected to the lifting plate.

[0011] Preferably, the bottom of the stirring drum is fixedly connected to an air inlet pipe, and multiple sealing rings are fixedly installed on the stirring rod.

[0012] A nano-calcium carbonate coating reaction device includes the multi-stage stirring blade mechanism described in any one of the above.

[0013] In the above technical solution, the present invention provides a multi-stage stirring blade mechanism and a nano-calcium carbonate coating reaction device, which has the following beneficial effects: while stirring the slurry by the stirring blade, the gas introduced at the bottom is broken up, increasing the reaction rate; the stirring rod drives the lifting plate to rise and fall, so that the slurry at the bottom is squeezed into the buffer chamber and sprayed out from the spray head to react with the gas; when the lifting plate moves down, the gas is compressed, thereby increasing the gas concentration, so that the sprayed slurry and gas can fully react with each other. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0016] Figure 2 A schematic diagram of the structure of the primary stirring mechanism provided in this embodiment of the utility model;

[0017] Figure 3 A schematic diagram of the structure of the stirring rod provided in an embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the lifting groove provided in an embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the contact ball provided in an embodiment of the present utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Stirring drum; 2. Servo motor; 3. Air inlet pipe; 4. Stirring rod; 5. Moving block; 6. Rotary disk; 7. First telescopic pipe; 8. Lifting plate; 9. Buffer chamber; 10. Spray head; 11. Stirring blade; 12. Outer sleeve; 13. Inner sleeve; 14. Connecting pipe; 15. Liquid lifting tank; 16. Sealing ring; 17. Water outlet; 18. One-way valve; 19. Lifting groove; 20. Second telescopic pipe; 21. Abutment ball. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Please see Figure 1-5A multi-stage stirring blade mechanism and nano-calcium carbonate coating reaction equipment are disclosed. The proposed technical solution includes a stirring cylinder 1, with a stirring rod 4 rotatably mounted inside the stirring cylinder 1. A primary stirring mechanism is fixedly mounted at the bottom of the stirring rod 4. A secondary stirring mechanism includes a moving block 5, with a lifting plate 8 fixedly mounted on the moving block 5. The lifting plate 8 is slidably connected to the inner wall of the stirring cylinder 1. The lifting plate 8 has a buffer chamber 9, and several spray heads 10 are fixedly mounted at the bottom of the lifting plate 8. A reciprocating spiral groove is formed on the outer circumference of the stirring rod 4. The moving block 5 contains… The wall is fixedly equipped with a contact ball 21 adapted to the reciprocating spiral groove; the liquid replenishment mechanism includes a liquid lifting box 15 rotatably mounted on the stirring rod 4, and a lifting plate 8 slidably connected to the liquid lifting box 15; a primary stirring mechanism is located at the bottom of the stirring drum 1. When gases such as carbon dioxide are introduced from the bottom of the stirring drum 1, the primary stirring mechanism disperses the introduced gas, which can increase the reaction rate between the gas and the slurry. The lifting plate 8 is slidably connected to the inner wall of the stirring drum 1. The lifting plate 8 can limit the movement of the moving block 5, so that when the stirring rod 4 rotates, it passes through the reciprocating spiral groove. The interaction between the vortex and the contact ball 21 drives the moving block 5 to rise and fall, which in turn drives the lifting plate 8 to rise and fall. In use, gases such as carbon dioxide are introduced into the slurry at the bottom of the mixing drum 1. The stirring rod 4 is rotated, and the primary stirring mechanism breaks up the gas. The gas then reacts with the slurry. Gases that haven't had time to react rise to the top of the slurry. As the stirring rod 4 rotates, the interaction between the contact ball 21 and the reciprocating spiral groove causes the lifting plate 8 to move downwards. When the lifting plate 8 moves downwards, it compresses the gas above the slurry, increasing the gas concentration. Simultaneously, the slurry... As the pressure between the lifting plate 8 and the slurry increases, the slurry at the bottom is squeezed into the extraction tank 15. As the liquid in the extraction tank 15 increases, the slurry in the extraction tank 15 enters the buffer chamber 9 of the lifting plate 8 and is sprayed out from the spray head 10 at the bottom of the lifting plate 8. Most of the sprayed slurry is from the bottom of the stirring drum 1. This part of the slurry is far from the surface and has difficulty contacting the upper gas, so the reaction is relatively slow. After the slurry at the bottom is sprayed out, it comes into full contact with the concentrated gas, which greatly increases the reaction rate and makes full use of gases such as carbon dioxide.

[0024] Specifically, the primary mixing mechanism includes multiple mixing blades 11 fixedly installed at the bottom of the mixing rod 4; when the mixing rod 4 rotates, it will drive the mixing blades 11 to rotate, and the mixing blades 11 can mix the slurry, while breaking up the gas introduced from the bottom, increasing the mixing rate between the gas and the slurry.

[0025] Specifically, a rotating disk 6 is fixedly installed on the stirring rod 4, a first telescopic tube 7 is fixedly installed between the rotating disk 6 and the moving block 5, and a second telescopic tube 20 is fixedly installed between the moving block 5 and the liquid lifting tank 15; the reciprocating spiral groove on the stirring rod 4 is only a middle part, and the liquid lifting tank 15 and the rotating disk 6 are rotated and sealed with the outer circumference of the stirring rod 4. The first telescopic tube 7 and the second telescopic tube 20 can cover the entire reciprocating spiral groove, thereby preventing the slurry from passing through the reciprocating spiral groove through the moving block 5 to reach the top of the lifting plate 8, ensuring the sealing between the lifting plate 8 and the slurry surface, and the lifting plate 8 slides and seals with the inner wall of the stirring cylinder 1.

[0026] Specifically, the stirring rod 4 has a lifting groove 19 inside, and a one-way valve 18 is fixedly installed at the bottom of the lifting rod. The top of the stirring rod 4 has two outlets 17 that communicate with the lifting groove 19. The one-way valve 18 only allows the slurry to enter the lifting groove 19 from the bottom of the stirring rod 4. The two outlets 17 connect the liquid extraction tank 15 to the lifting groove 19. When the lifting plate 8 moves down to a certain extent, the slurry is subjected to sufficient pressure. The slurry at the bottom of the stirring rod 4 enters the lifting groove 19 through the one-way valve 18. As the pressure increases, the liquid in the lifting rod enters the liquid extraction tank 15 through the outlets 17.

[0027] Specifically, the outer circumference of the liquid extraction tank 15 is fixedly connected to two connecting pipes 14. Each connecting pipe 14 is fixedly connected to an inner sleeve 13 at the end away from the liquid extraction tank 15. An outer sleeve 12 is slidably disposed on the outer circumference of each inner sleeve 13. Each outer sleeve 12 is fixedly connected to the lifting plate 8. The inner sleeve 13 and the outer sleeve 12 are slidably sealed. When the liquid in the liquid extraction tank 15 gradually increases, the slurry will enter the inner sleeve 13 through the connecting pipe 14, and then enter the buffer chamber 9 of the lifting plate 8 from the inner sleeve 13. Finally, it will be sprayed out from the spray head 10. When the lifting plate 8 moves down, the gas between the slurry and the lifting plate 8 is squeezed, causing the slurry to enter the lifting tank 19 and be sprayed out from the spray head 10. At the same time, the lifting plate 8 moves down and the inner sleeve 13 and outer sleeve 12 are slidably sealed. The increased space between the inner sleeve 13 and the outer sleeve 12 creates a negative pressure, which draws the slurry into the space between the inner sleeve 13 and the outer sleeve 12. It should be noted that the negative pressure generated between the inner sleeve 13 and the outer sleeve 12 is less than the squeezing force on the slurry. That is, when the lifting plate 8 moves down, the negative pressure generated in the inner sleeve 13 cannot completely compensate for the pressure of the slurry, so that the slurry can be smoothly squeezed into the buffer chamber 9. When the lifting plate 8 moves up, the space between the inner sleeve 13 and the outer sleeve 12 shrinks, but the slurry inside cannot flow out from the bottom of the lifting trough 19. Therefore, the slurry between the inner sleeve 13 and the outer sleeve 12 can only be sprayed out from the spray head 10, so that the spray head 10 sprays slurry when the lifting plate 8 rises or falls, thus increasing the reaction rate.

[0028] Specifically, an air inlet pipe 3 is fixedly connected to the bottom of the mixing drum 1, and multiple sealing rings 16 are fixedly installed on the stirring rod 4; a servo motor 2 is fixedly installed at the top of the mixing drum 1, and the output end of the servo motor 2 is fixedly connected to the stirring rod 4. The servo motor 2 drives the stirring rod 4 to rotate, thereby driving the stirring blades 11 to rotate, and at the same time driving the moving block 5 to rise and fall. The air inlet pipe 3 is used to introduce gases such as carbon dioxide into the bottom of the slurry. There are three sealing rings 16. There are two contact positions between the upper wall of the liquid extraction box 15 and the stirring rod 4, and one contact position between the rotating disk 6 and the stirring rod 4. The sealing rings 16 can ensure the sealing between the liquid extraction box 15, the rotating disk 6 and the stirring rod 4.

[0029] A nano-calcium carbonate coating reaction device, comprising any one of the above-mentioned multi-stage stirring blade mechanisms.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage paddle mechanism comprising a mixing drum (1), characterized in that, The stirring barrel (1) is internally rotatably provided with a stirring rod (4), and a primary stirring mechanism is fixedly arranged at the bottom of the stirring rod (4); The secondary stirring mechanism comprises a moving block (5), wherein the moving block (5) is fixedly provided with a lifting disc (8), the lifting disc (8) is in sliding connection with the inner wall of the stirring barrel (1), the lifting disc (8) is provided with a buffer cavity (9), the bottom of the lifting disc (8) is fixedly provided with a plurality of spray heads (10), the outer circumferential surface of the stirring rod (4) is provided with a reciprocating spiral groove, and the inner wall of the moving block (5) is fixedly provided with an abutting ball (21) matched with the reciprocating spiral groove. The liquid supplementing mechanism comprises a liquid lifting tank (15) rotatably arranged on the stirring rod (4), and the lifting disc (8) is in sliding connection with the liquid lifting tank (15).

2. A multi-stage paddle mechanism according to claim 1, wherein, The primary stirring mechanism comprises a plurality of stirring blades (11) fixedly arranged at the bottom of the stirring rod (4).

3. A multi-stage paddle mechanism according to claim 2, wherein, The stirring rod (4) is fixedly provided with a rotating disc (6), a first telescopic pipe (7) is fixedly arranged between the rotating disc (6) and the moving block (5), and a second telescopic pipe (20) is fixedly arranged between the moving block (5) and the liquid lifting tank (15).

4. A multi-stage paddle mechanism according to claim 3, wherein, The stirring rod (4) is internally provided with a lifting groove (19), the bottom of the lifting groove (19) is fixedly provided with a one-way valve (18), and the top of the stirring rod (4) is provided with two water outlets (17) in communication with the lifting groove (19).

5. A multi-stage paddle mechanism according to claim 4, wherein, The liquid lifting tank (15) is fixedly and communicatively provided with two connecting pipes (14), one end of each connecting pipe (14) is fixedly and communicatively provided with an inner sleeve pipe (13) away from the liquid lifting tank (15), the outer circumferential surface of each inner sleeve pipe (13) is slidingly provided with an outer sleeve pipe (12), and each outer sleeve pipe (12) is fixedly and communicatively provided with the lifting disc (8).

6. A multi-stage paddle mechanism according to claim 5, wherein, The bottom of the stirring barrel (1) is fixedly and communicatively provided with an air inlet pipe (3), and the stirring rod (4) is fixedly provided with a plurality of sealing rings (16).

7. A nano calcium carbonate coating reaction apparatus, characterized in that, The multi-stage stirring blade mechanism comprises the multi-stage stirring blade mechanism according to any one of claims 1-6. The multi-stage stirring blade mechanism comprises the multi-stage stirring blade mechanism according to any one of claims 1-6.

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