Drying device for high-solid-content nano calcium carbonate

Abstract

The utility model relates to the technical field of nano calcium carbonate production, in particular to a high-solid-content nano calcium carbonate drying device which comprises a drying box, a feeding port is formed in one end of the drying box, a discharging port is formed in the end, opposite to the feeding port, of the drying box, and a punching plate is fixedly arranged in the middle of the interior of the drying box. The punching plate divides the drying box body into an upper drying cavity and a lower air inlet cavity; a plurality of air outlets communicated with the upper drying cavity are formed in the drying box body, a plurality of impact components are further arranged in the upper drying cavity, a plurality of air inlets communicated with the lower air inlet cavity are formed in the drying box body, and the air inlets are connected with an air supply device; a vibration motor is arranged on the outer side wall of the drying box, and box fixing pieces are evenly arranged on the outer side of the bottom of the drying box. The drying device further comprises a bottom plate, bottom plate fixing pieces corresponding to the box body fixing pieces are arranged on the bottom plate, and the box body fixing pieces and the bottom plate fixing pieces are detachably connected with the vibration component. The drying and crushing device can synchronously realize drying and crushing, and is good in drying effect.

Description

Technical Field

[0001] This utility model relates to the field of nano-calcium carbonate production technology, specifically to a drying device for high-solids-content nano-calcium carbonate. Background Technology

[0002] Nano-calcium carbonate, as an important inorganic functional material, is widely used in plastics, rubber, coatings, papermaking, and other fields. Its high solids content (≥70%) has attracted much attention due to its low transportation costs and high processing efficiency. However, the drying process of high-solids-content materials faces significant technical bottlenecks: on the one hand, high solids content leads to poor material flowability and low heat transfer efficiency, making it difficult for traditional drying equipment (such as flash drying and disc drying) to achieve uniform heating, easily resulting in localized overheating or agglomeration; on the other hand, due to their high surface energy, nanoparticles are prone to secondary agglomeration during the drying process, directly affecting product dispersibility and application performance.

[0003] Chinese utility model patent CN210638387U discloses a dryer for nano-activated calcium carbonate, including a main shell with four fixed feet at the bottom corners. A door panel is rotatably connected to one side of the main shell. Multiple heating lamps are fixed to the upper part of the main shell, and support plates are fixed to both sides of the main shell. A storage box is disposed between two support plates, and upper plates are fixed to both sides of the storage box, with the upper plates placed on top of the support plates. A rotating plate is rotatably connected to one side of the storage box, and the upper sides of the rotating plate are connected to the storage box via an insertion mechanism. The multiple heating lamps inside the main shell heat the interior of the main shell, maintaining a high temperature to dry the calcium carbonate in the storage box. However, the above-mentioned prior art, which places calcium carbonate in the storage box and uses heating lamps to dry it, results in the calcium carbonate clumping due to moisture loss after drying, making it inconvenient for subsequent processing or use. Utility Model Content

[0004] To address the technical problems of poor material flowability and easy agglomeration after drying in the existing technology of nano-calcium carbonate drying process, this utility model provides a drying device for high solid content nano-calcium carbonate.

[0005] This utility model provides a drying device for high solid content nano-calcium carbonate, including a drying box, an inlet at one end of the drying box, an outlet at the end of the drying box opposite the inlet, and a perforated plate fixedly installed in the middle of the drying box, which divides the drying box into an upper drying chamber and a lower air inlet chamber.

[0006] The drying chamber has several air outlets that communicate with the upper drying chamber. Several impact components are also installed in the upper drying chamber. Several air inlets that communicate with the lower air inlet chamber are opened on the drying chamber. The air inlets are connected to the air supply device.

[0007] A vibration motor is installed on the outer wall of the drying chamber, and chamber fixing parts are evenly arranged on the bottom outer side of the drying chamber.

[0008] The drying device also includes a base plate, on which a base plate fixing component is provided corresponding to the box fixing component. The box fixing component and the base plate fixing component are detachably connected to the vibration component.

[0009] Furthermore, the perforated plate can be set horizontally or at an angle; when the perforated plate is set at an angle, the high end of the perforated plate corresponds to the feed port and the low end corresponds to the discharge port, with an angle of 5°-15°.

[0010] The perforated plate is tilted, allowing high-solids-content nano-calcium carbonate to slide naturally from the high-end feed port to the low-end discharge port with the aid of gravity, reducing vibration energy consumption and extending the residence time of the material in the drying chamber; at the same time, the tilted surface and vibration work together to enhance the tumbling and dispersion effect of high-solids-content nano-calcium carbonate, further improving the drying uniformity.

[0011] Furthermore, a removable first filter screen is covered on the lower surface of the perforated plate.

[0012] Furthermore, the impact component is a polyhedron.

[0013] Furthermore, the air supply device includes an air heater and a blower; the air inlet is connected to the air heater through an air inlet duct; a flexible alloy connecting pipe is connected between the air inlet and the air inlet duct; and the air heater is connected to the blower.

[0014] The flexible alloy connecting pipe absorbs vibrations from the drying chamber, preventing deformation of the air inlet duct due to stress.

[0015] Furthermore, a second filter is installed at the air outlet; and a third filter is installed at the connection between the air inlet and the connecting flexible alloy pipe.

[0016] Furthermore, the flexible alloy connecting pipe is a stainless steel corrugated pipe.

[0017] Furthermore, the vibration component is a one-piece molded spring; the fixing parts at both ends of the spring are disc-shaped, the housing fixing part is an annular flange that matches the disc-shaped fixing part at one end of the spring, and the base plate fixing part is an annular flange that matches the disc-shaped fixing part at the other end of the spring; the fixing part at one end of the spring is threadedly connected to the housing fixing part, and the fixing part at the other end of the spring is threadedly connected to the base plate fixing part.

[0018] It facilitates the replacement of vibrating components.

[0019] Furthermore, a tempered glass observation window is provided on the side wall of the drying chamber for observing the condition inside the upper drying chamber, and the tempered glass observation window is hinged to the drying chamber; an inspection door for cleaning the lower air inlet chamber is also provided on the side wall of the drying chamber.

[0020] The condition of the high-solids-content nano-calcium carbonate can be monitored in real time through the tempered glass observation window. When the machine is shut down, the inspection door can be opened to clean any residual high-solids-content nano-calcium carbonate in the lower air inlet cavity.

[0021] Furthermore, the number of vibrating components is two to four.

[0022] The beneficial effects of this utility model are as follows:

[0023] This invention provides a drying device for high-solids-content nano-calcium carbonate. Firstly, a perforated plate inside the drying chamber divides the chamber into an upper drying chamber and a lower air inlet chamber. Combined with the air inlet and air supply device, this allows hot air to enter the lower air inlet chamber evenly and be stably transported upwards to the upper drying chamber, forming a good drying airflow field. This ensures that the nano-calcium carbonate is in full contact with the hot air during the drying process, effectively improving drying efficiency and uniformity. Secondly, an impact component inside the upper drying chamber increases the impact contact area, allowing for sufficient impact dispersion of the rising nano-calcium carbonate particles, preventing particle damage. The drying device features several advantages: firstly, it ensures uniform particle size of high-solids-content nano-calcium carbonate particles; secondly, the vibration motor installed on the outer wall of the drying chamber, in conjunction with the vibration component at the bottom, enables uniform vibration of the drying chamber, promoting directional flow of materials within the chamber, preventing material accumulation, and further improving the drying effect; thirdly, the detachable connection design of the chamber fixing components, bottom plate fixing components, and vibration components facilitates the installation, disassembly, and maintenance of the equipment; and finally, the overall structure of the drying device is compact and reasonable, with all components working in synergy to meet the needs of industrial production for the drying of nano-calcium carbonate, demonstrating good practicality and promotional value. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a partial structural cross-sectional schematic diagram of the drying device for high-solids-content nano-calcium carbonate in Example 1.

[0026] Figure 2 This is a top view schematic diagram of the drying device for high-solids-content nano-calcium carbonate in Example 1.

[0027] Figure 3 This is a top view of the base plate.

[0028] Figure 4 This is a partial structural cross-sectional schematic diagram of the drying device for high-solids-content nano-calcium carbonate in Example 2.

[0029] In the diagram, 1-drying chamber, 2-impact component, 3-feed inlet, 4-air outlet, 5-perforated plate, 6-air inlet, 7-fixing bolt, 8-fixing nut, 9-chamber fixing component, 10-bottom plate fixing component, 11-vibration component, 12-bottom plate, 13-discharge outlet, 14-flexible alloy connecting pipe, 15-air inlet pipe, 16-air heater, 17-blower, 18-vibration motor. Detailed Implementation

[0030] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0031] Example 1

[0032] like Figures 1-3 As shown, a drying device for high solid content nano-calcium carbonate includes a drying chamber 1, an inlet 3 at one end of the drying chamber 1, an outlet 13 at the end of the drying chamber 1 opposite to the inlet 3, a perforated plate 5 fixedly installed in the middle of the drying chamber 1, the perforated plate 5 being horizontally installed, and a removable first filter screen covering the lower surface of the perforated plate 5.

[0033] The perforated plate 5 divides the drying chamber 1 into an upper drying chamber and a lower air inlet chamber;

[0034] The drying chamber 1 has three air outlets 4 that communicate with the upper drying chamber. A second filter screen is installed on the air outlets 4. A multi-faceted impact component 2 is also installed in the upper drying chamber.

[0035] The drying chamber 1 is also provided with three air inlets 6 that are connected to the lower air inlet chamber. The air inlets 6 are connected to the air heater 16 through the air inlet pipe 15. A stainless steel corrugated pipe is connected between the air inlets 6 and the air inlet pipe 15. The air heater 16 is connected to the blower 17. A third filter screen is installed at the connection between the air inlets 6 and the stainless steel corrugated pipe.

[0036] A vibration motor 18 is installed on the outer wall of the drying chamber 1. The vibration motor 18 and the air inlet 6 are respectively installed on both sides of the drying chamber 1. The chamber fixing parts 9 are evenly arranged on the outer bottom of the drying chamber 1.

[0037] The drying device also includes a base plate 12, on which a base plate fixing member 10 is provided corresponding to the box fixing member 9. The box fixing member 9 and the base plate fixing member 10 are detachably connected to the vibration member 11. There are two vibration members 11. Specifically, the vibration member 11 is an integrally formed spring, and the fixing parts at both ends of the spring are disc-shaped. The box fixing member 9 is an annular flange that matches the disc-shaped fixing part at one end of the spring, and the base plate fixing member 10 is an annular flange that matches the disc-shaped fixing part at the other end of the spring. After the fixing part of the spring is connected to the fixing part of the box 9, the fixing bolt 7 passes horizontally through the bolt hole of the fixing part and the fixing part of the box 9 and then the fixing bolt 7 is connected to the fixing nut 8. The fixing part of the other end of the spring is threadedly connected to the fixing part of the bottom plate 10 (the connection method is the same as the connection method between the fixing part of the spring and the fixing part of the box 9). A tempered glass observation window for observing the condition inside the upper drying chamber is provided on the side wall of the drying box 1. The tempered glass observation window is hinged to the drying box 1. An inspection door for cleaning the lower air inlet chamber is also provided on the side wall of the drying box 1.

[0038] In use, high-solids-content nano-calcium carbonate is fed into the upper drying chamber of the drying chamber 1 through the feed inlet 3. The vibration motor 18 and the blower 17 are turned on in succession. After the blower 17 draws in air, it inputs the filtered air into the air heater 16. The heated air is sent into the lower air inlet chamber through the air inlet 6. At this time, under the excitation force of the vibration motor 18, the drying chamber 1 produces directional and uniform vibration, which causes the high-solids-content nano-calcium carbonate to move directionally and uniformly from one end of the perforated plate 5 near the feed inlet 3 to the other end of the perforated plate 5 near the discharge outlet 13. In addition, the hot air blown upward from the lower air inlet chamber causes the high-solids-content nano-calcium carbonate to be in a boiling state. During the upward impact of the impact component 2, the dried and agglomerated high-solids-content nano-calcium carbonate is dispersed into finer particles, which enhances the drying effect.

[0039] The dried high-solids-content nano-calcium carbonate, under the combined action of hot air and vibration in the drying chamber, forms a fluidized state, resulting in a long contact time and large contact area between the high-solids-content nano-calcium carbonate and the hot air, thus achieving a highly efficient drying effect. The dried high-solids-content nano-calcium carbonate is discharged from outlet 13. The moisture generated in the upper drying chamber is discharged through outlet 4 by the induced draft fan for further processing.

[0040] The flow status of high-solids-content nano-calcium carbonate can be monitored in real time through the tempered glass observation window. If local accumulation or uneven drying occurs, the frequency of the vibration motor 18 and / or the hot air temperature can be adjusted. The stainless steel corrugated pipe absorbs the vibration of the drying chamber 1, preventing the air inlet duct 15 from being deformed by stress, which would affect the stability of the air heater 16 and the blower 17.

[0041] During vibration, the high-solids-content nano-calcium carbonate adhering to the first, second, and third filter screens will be shaken off and will not cause blockage. If blockage occurs, for the first filter screen, the inspection door can be opened to remove and replace it; for the second filter screen, it can be removed from the air outlet 4 and replaced; for the third filter screen, the stainless steel corrugated pipe can be disconnected from the air inlet 6 and the second filter screen can be removed and replaced.

[0042] After use, use two lifts to support both sides of the drying chamber 1, and then raise the lifting platform of the lifts to disassemble the vibration component 11. This will prevent the vibration component 11 from being subjected to long-term stress and shorten its service life. Regularly inspect the vibration component 11 and replace it in time if there are any problems.

[0043] Example 2

[0044] like Figure 2-4 As shown, a drying device for high-solids-content nano-calcium carbonate includes a drying chamber. The drying device for high-solids-content nano-calcium carbonate includes a drying chamber body 1. A feed inlet 3 is provided at one end of the drying chamber body 1, and a discharge outlet 13 is provided at the other end of the drying chamber body 1 opposite to the feed inlet 3. A perforated plate 5 is fixedly provided in the middle of the drying chamber body 1. The perforated plate 5 is inclined, with the high end of the perforated plate 5 corresponding to the feed inlet 3 and the low end corresponding to the discharge outlet 13. The inclination angle is -15°. A removable first filter screen is covered on the lower surface of the perforated plate 5.

[0045] The perforated plate 5 divides the drying chamber 1 into an upper drying chamber and a lower air inlet chamber;

[0046] The drying chamber 1 has three air outlets 4 that communicate with the upper drying chamber. A second filter screen is installed on the air outlets 4. A multi-faceted impact component 2 is also installed in the upper drying chamber.

[0047] The drying chamber 1 is also provided with three air inlets 6 that are connected to the lower air inlet chamber. The air inlets 6 are connected to the air heater 16 through the air inlet pipe 15. A stainless steel corrugated pipe is connected between the air inlets 6 and the air inlet pipe 15. The air heater 16 is connected to the blower 17. A third filter screen is installed at the connection between the air inlets 6 and the stainless steel corrugated pipe.

[0048] A vibration motor 18 is installed on the outer wall of the drying chamber 1. The vibration motor 18 and the air inlet 6 are respectively installed on both sides of the drying chamber 1. The chamber fixing parts 9 are evenly arranged on the outer bottom of the drying chamber 1.

[0049] The drying device also includes a base plate 12, on which a base plate fixing member 10 is provided corresponding to the box fixing member 9. The box fixing member 9 and the base plate fixing member 10 are detachably connected to the vibration component 11. There are two vibration components 11. Specifically, the vibration component 11 is an integrally formed spring, and the fixing parts at both ends of the spring are disc-shaped. The box fixing member 9 is an annular flange adapted to the disc-shaped fixing part at one end of the spring, and the base plate fixing member 10 is an annular flange adapted to the disc-shaped fixing part at the other end of the spring. A flange is formed; after the fixing part at one end of the spring is connected to the fixing part 9 of the box, the fixing bolt 7 passes horizontally through the bolt hole of the fixing part and the fixing part 9 of the box and then the fixing bolt 7 is connected to the fixing nut 8. The fixing part at the other end of the spring is threadedly connected to the fixing part 10 of the bottom plate (the connection method is the same as the connection method between the fixing part at one end of the spring and the fixing part 9 of the box); a tempered glass observation window for observing the condition inside the upper drying chamber is provided on the side wall of the drying box 1, and an inspection door for cleaning the lower air inlet chamber is also provided on the side wall of the drying box 1.

[0050] The difference from Example 1 is that the perforated plate 5 is inclined, and the high solid content nano calcium carbonate can slide naturally from the high-end feed port 3 to the low-end discharge port 13 with the help of gravity, reducing vibration energy consumption and extending the residence time of the material in the drying chamber; at the same time, the inclined surface and vibration work together to enhance the tumbling and dispersion effect of the high solid content nano calcium carbonate, further improving the drying uniformity.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drying device for high-solids-content nano-calcium carbonate, comprising a drying chamber (1), characterized in that, A feed inlet (3) is provided at one end of the drying chamber (1), and a discharge outlet (13) is provided at the other end of the drying chamber (1) opposite to the feed inlet (3). A perforated plate (5) is fixedly provided in the middle of the drying chamber (1), and the perforated plate (5) divides the drying chamber (1) into an upper drying chamber and a lower air inlet chamber. The drying chamber (1) has several air outlets (4) connected to the upper drying chamber. Several impact components (2) are also installed in the upper drying chamber. Several air inlets (6) connected to the lower air inlet chamber are opened on the drying chamber (1). The air inlets (6) are connected to the air supply device. A vibration motor (18) is installed on the outer wall of the drying chamber (1), and chamber fixing parts (9) are evenly installed on the outer bottom of the drying chamber (1). The drying device also includes a base plate (12), on which a base plate fixing member (10) is provided corresponding to the box fixing member (9). The box fixing member (9) and the base plate fixing member (10) are detachably connected to the vibration component (11).

2. The drying apparatus for high-solids-content nano-calcium carbonate as described in claim 1, characterized in that, The perforated plate (5) is set horizontally or inclined; when the perforated plate (5) is set inclined, the high end of the perforated plate (5) corresponds to the feed port (3) and the low end corresponds to the discharge port (13), with an inclination angle of 5°-15°.

3. A drying apparatus for high-solids-content nano-calcium carbonate as described in claim 1 or 2, characterized in that, The lower surface of the perforated plate (5) is covered with a removable first filter screen.

4. The drying apparatus for high-solids-content nano-calcium carbonate as described in claim 1, characterized in that, The impact component (2) is a polyhedron.

5. The drying apparatus for high-solids-content nano-calcium carbonate as described in claim 1, characterized in that, The air supply device includes an air heater (16) and a blower (17); the air inlet (6) is connected to the air heater (16) through the air inlet pipe (15); a flexible alloy connecting pipe (14) is connected between the air inlet (6) and the air inlet pipe (15); the air heater (16) is connected to the blower (17).

6. The drying apparatus for high-solids-content nano-calcium carbonate as described in claim 5, characterized in that, A second filter screen is installed on the air outlet (4); a third filter screen is installed at the connection between the air inlet (6) and the connecting flexible alloy connecting pipe (14).

7. A drying apparatus for high-solids-content nano-calcium carbonate as described in claim 5 or 6, characterized in that, The flexible alloy connecting pipe (14) is a stainless steel corrugated pipe.

8. The drying apparatus for high-solids-content nano-calcium carbonate as described in claim 1, characterized in that, The vibration component (11) is an integrally formed spring; the fixing parts at both ends of the spring are disc-shaped, the box fixing part (9) is an annular flange that matches the disc-shaped fixing part at one end of the spring, and the bottom plate fixing part (10) is an annular flange that matches the disc-shaped fixing part at the other end of the spring; the fixing part at one end of the spring is threadedly connected to the box fixing part (9), and the fixing part at the other end of the spring is threadedly connected to the bottom plate fixing part (10).

9. The drying apparatus for high-solids-content nano-calcium carbonate as described in claim 1, characterized in that, A tempered glass observation window is provided on the side wall of the drying chamber (1) for observing the condition inside the upper drying chamber. The tempered glass observation window is hinged to the drying chamber (1). An inspection door for cleaning the lower air inlet chamber is also provided on the side wall of the drying chamber (1).

10. The drying apparatus for high-solids-content nano-calcium carbonate as described in claim 1, characterized in that, The number of vibrating components (11) is two to four.

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