Drying device for producing food additive calcium carbonate

Abstract

The utility model provides a drying device for production of food additive calcium carbonate, and relates to the technical field of drying devices.The drying device for production of the food additive calcium carbonate comprises a drying mechanism, a drying mechanism and a drying mechanism, the drying mechanism comprises a drying bin, and a feeding port and a discharging port are formed in the drying bin; the smashing mechanism comprises a smashing bin and a smashing assembly arranged on the smashing bin, and the smashing bin communicates with the feeding port of the drying bin; and the conveying mechanism is used for conveying the materials discharged from the discharging opening of the drying bin into the crushing bin. In the drying process, part of materials are discharged from the discharging port, the materials discharged from the discharging port of the drying bin are conveyed into the smashing bin again through the conveying mechanism to be smashed, then the materials enter the roller to be continuously dried, and therefore the materials are smashed and dried repeatedly. And filter cakes with large volumes in the materials are continuously crushed into small blocks and then are dried, so that the drying effect is effectively improved, and the phenomenon of insufficient drying is reduced as much as possible.

Description

Technical Field

[0001] This application relates to the field of drying equipment technology, and in particular to a drying equipment for the production of calcium carbonate, a food additive. Background Technology

[0002] Calcium carbonate is an inorganic compound, usually existing as a white solid, and is the main component of limestone and calcite. It is widely distributed in nature and has applications in various fields, including the food industry. As a common food additive, calcium carbonate is mainly used to supplement calcium and improve food texture, specifically including the following functions: Supplementing calcium: Calcium carbonate increases the calcium content in food, helping to meet the body's calcium needs; Improving food texture: Calcium carbonate can make food more delicate in texture, such as adding crispness to pastries; As a leavening agent: In baked goods, calcium carbonate causes the food to expand in volume, becoming softer; Regulating pH: Calcium carbonate helps maintain the acid-base balance of food, ensuring its quality and taste; Enhancing food stability: Calcium carbonate can extend the shelf life of food and maintain its good quality.

[0003] The main production processes for food additive calcium carbonate include metathesis, carbonation, and natural ore processing, with carbonation being the most common. The carbonation process primarily involves the following steps: limestone calcination, lime milk preparation, carbonation reaction, filtration and washing, drying, and pulverization. A rotary drum dryer is used in the carbonation process to dry the filter cake after filtration and washing. For example, patent application CN111219975A discloses a drying device for food-grade calcium carbonate production. This device includes a drying chamber and a blower. A first connecting pipe with a feed inlet and an air inlet is installed at the higher end of the drying chamber, while a second connecting pipe with a discharge outlet is installed at the lower end. The discharge outlet is connected to a grinding mill via a pipe. The blower is connected to the air inlet via a pipe, and a heating device is installed on the pipe. The working principle of the above drying device is as follows: After filtration and washing, the calcium carbonate raw material forms a filter cake. The filter cake enters the drying chamber through the feed inlet for drying. The dried material is discharged from the discharge outlet and sent to the grinding mill for further fine grinding.

[0004] However, during the drying process of the aforementioned drying device, because the material entering the drying chamber consists of filter cake blocks of varying sizes, larger filter cake blocks are prone to insufficient drying. This means that while the exterior of the filter cake block is dry, the interior still contains significant moisture and is not fully dried. After drying, the material containing these insufficiently dried filter cake blocks is further ground in a grinding mill before being packaged as a finished product. This results in the presence of insufficiently dried material in the packaged product, leading to clumping and product deterioration. Utility Model Content

[0005] The purpose of this application is to provide a drying device for the production of calcium carbonate, a food additive, to solve the problem that drying devices in related technologies are prone to insufficient drying, which in turn leads to material clumping, product deterioration, and other problems.

[0006] The drying apparatus for producing calcium carbonate, a food additive, provided in this application adopts the following technical solution:

[0007] A drying apparatus for producing calcium carbonate, a food additive, includes:

[0008] A drying mechanism, comprising a drying chamber, wherein the drying chamber is provided with a feed inlet and a discharge outlet;

[0009] A crushing mechanism, comprising a crushing chamber and a crushing assembly disposed on the crushing chamber, wherein the crushing chamber is connected to the feed inlet of the drying chamber;

[0010] A conveying mechanism is used to convey materials discharged from the outlet of the drying chamber into the crushing chamber.

[0011] Optionally, the conveying mechanism includes a two-axis linear module, a transfer bucket, and a belt conveyor. The two-axis linear module is connected to the transfer bucket and is used to drive the transfer bucket to move laterally and vertically. The bottom of the transfer bucket is provided with a discharge port, and a baffle is provided at the discharge port of the transfer bucket. The belt conveyor is used to transport the material discharged from the outlet of the drying chamber into the transfer bucket.

[0012] Optionally, the conveying mechanism further includes an opening and closing assembly, which includes a rack, a rotating shaft, and an elastic element. The baffle is hinged to the transfer bucket via a pivot. A worm gear is provided on the pivot. The rack is slidably disposed on the transfer bucket. The rotating shaft is rotatably disposed on the transfer bucket. A worm gear meshing with the worm gear and a linkage gear meshing with the rack are provided on the rotating shaft. The elastic element is used to provide a spring force to push the baffle to close at the discharge port. The crushing chamber is provided with a limiting part that can abut against the rack.

[0013] Optionally, the elastic element is a spring, the transfer bucket is provided with a first boss, the rack is provided with a second boss, the second boss is provided with a column, the column is slidably inserted through the first boss, the spring is sleeved on the outside of the column, and the two ends of the spring abut against the first boss and the second boss respectively.

[0014] Optionally, the upper part of the crushing chamber is provided with a feed hopper with an opening on one side, and the limiting part is the side wall of the feed hopper opposite to the opening side.

[0015] Optionally, the drying mechanism further includes a first frame, the drying chamber includes a drum and a cover, the drum is rotatably mounted on the first frame, the cover is fixed on the first frame and sleeved on the end of the drum, the discharge port is located at the bottom of the cover, the cover is provided with a transfer chamber communicating with the discharge port, and the transfer chamber is provided with a discharge assembly for conveying the material in the transfer chamber to the belt conveyor.

[0016] Optionally, the discharge assembly includes a discharge valve, a valve plate, and a switching drive. The bottom of the transfer silo is provided with a discharge pipe, the discharge valve is provided on the discharge pipe, the discharge pipe is provided with a return port and a discharge port, the return port is used to discharge the material in the transfer silo onto the belt conveyor, the valve plate is provided on the discharge pipe, and the switching drive is used to drive the valve plate to close the return port or the discharge port.

[0017] Optionally, the drying mechanism further includes a rotary drive component connected to the drum and used to drive the drum to rotate. The inner peripheral wall of the drum is provided with spiral blades and lifting plates arranged at intervals along the spiral line.

[0018] In summary, this application includes at least the following beneficial technical effects: When drying materials using the drying device for producing calcium carbonate, a food additive, the materials are fed into a crushing chamber and crushed by crushing components. The crushed materials then enter a drying chamber for further drying. During the drying process, the materials are discharged from the outlet and conveyed back into the crushing chamber for crushing by a conveying mechanism. The materials then enter a drum for continued drying, thus repeatedly crushing and drying the materials. This process continuously breaks down larger filter cake blocks into smaller pieces before drying, effectively improving the drying effect and minimizing the occurrence of insufficient drying. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the drying device for producing calcium carbonate, a food additive, in the embodiments of this application.

[0020] Figure 2 This is a cross-sectional view of the drying apparatus for producing calcium carbonate, a food additive, in an embodiment of this application.

[0021] Figure 3 for Figure 2 A magnified view of part C in the middle;

[0022] Figure 4 for Figure 2 A magnified view of part B in the middle section;

[0023] Figure 5 for Figure 2A magnified view of part D in the middle;

[0024] Figure 6 for Figure 1 A magnified view of part A in the diagram.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Drying mechanism; 11. First frame; 12. Drum; 121. Feed inlet; 122. Spiral blades; 123. Lifting plate; 124. Gear ring; 125. Annular guide rail; 13. Cover; 131. Discharge outlet; 132. Transfer hopper; 133. Air inlet; 134. Discharge pipe; 135. Return port; 136. Discharge outlet; 14. Support roller; 15. Rotary drive motor; 151. Rotary gear;

[0027] 20. Crushing mechanism; 21. Crushing chamber; 211. Feed pipe; 212. Feed hopper; 22. Second frame; 23. Crushing shaft; 231. Crushing blade; 232. Transmission gear; 24. Crushing drive motor; 30. Two-axis linear module; 31. Third frame; 311. Vertical guide column; 32. Vertical lead screw; 33. Lifting drive motor; 34. Lifting frame; 341. Screw sleeve; 35. Horizontal electric push rod; 351. Telescopic rod;

[0028] 40. Transfer bucket; 41. Baffle; 411. Pivot; 412. Worm gear; 413. Guide sleeve; 42. Transverse guide rod; 43. First boss; 50. Belt conveyor; 51. Fourth frame; 52. Roller; 53. Conveyor belt; 54. Conveyor drive motor;

[0029] 60. Opening and closing assembly; 61. Rack; 611. Second boss; 612. Column; 62. Rotating shaft; 621. Worm gear; 622. Linkage gear; 63. Spring; 70. Discharge assembly; 71. Unloading valve; 72. Valve plate; 721. Valve shaft; 73. Switching drive motor. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail below.

[0031] This application discloses a drying apparatus for the production of calcium carbonate, a food additive.

[0032] A drying device for producing calcium carbonate, a food additive, includes a drying mechanism 10, a crushing mechanism 20, and a conveying mechanism.

[0033] Reference Figures 1 to 3The drying mechanism 10 includes a drying chamber, a first frame 11, a support roller 14, and a rotary drive component. The drying chamber includes a drum 12 and a cover 13. The drum 12 is rotatably mounted on the first frame 11. More specifically, the support roller 14 is rotatably mounted on the first frame 11. An annular guide rail 125 is provided on the outer peripheral wall of the drum 12. The drum 12 is rotatably mounted on the support roller 14 via the annular guide rail 125.

[0034] The rotary drive is connected to the drum 12 and is used to drive the drum 12 to rotate. More specifically, the rotary drive is a rotary drive motor 15, which is fixed on the first frame 11. The output shaft of the rotary drive motor 15 is provided with a rotary gear 151, and the outer peripheral wall of the drum 12 is provided with a gear ring 124 that meshes with the rotary gear 151.

[0035] The drying chamber is provided with a feed inlet 121 and a discharge outlet 131. More specifically, the feed inlet 121 is located at one end of the drum 12, the cover 13 is fixed on the first frame 11 and sleeved on the other end of the drum 12 opposite to the feed inlet 121, and the discharge outlet 131 is located at the bottom of the cover 13.

[0036] The inner circumferential wall of the drum 12 is provided with spiral blades 122 and lifting plates 123 arranged at intervals along the spiral line. The cover 13 is provided with an air inlet 133 for introducing hot air into the drum 12. When the material is dried in the drum 12, the air inlet 133 is connected to the hot air source, and the hot air enters the drum 12 through the air inlet 133 to dry the material. During the drying process, the drum 12 is driven to rotate by the rotary drive motor 15. During the rotation of the drum 12, the lifting plates 123 turn the material over, so that the material is in full contact with the hot air to improve the drying effect. At the same time, the spiral blades 122 slowly convey the material forward, so that the material is discharged from the drum 12 through the discharge port 131.

[0037] Reference Figure 1 and Figure 4 The crushing mechanism 20 includes a second frame 22, a crushing chamber 21, and a crushing assembly mounted on the crushing chamber 21. The crushing chamber 21 is fixedly mounted on the second frame 22. The crushing assembly includes crushing shafts 23 and a crushing drive motor 24. There are two crushing shafts 23, which are rotatably mounted inside the crushing chamber 21. Crushing blades 231 are mounted on the crushing shafts 23, and meshing transmission gears 232 are mounted on the two crushing shafts 23. The crushing drive motor 24 is fixedly mounted on the crushing chamber 21 and connected to one of the crushing shafts 23. The crushing chamber 21 communicates with the feed inlet 121 of the drying chamber. More specifically, the bottom of the crushing chamber 21 has a feed pipe 211 that passes through the feed inlet 121 and extends into the inside of the drum 12.

[0038] Before the material enters the drum 12 for drying, it is put into the crushing chamber 21. The crushing drive motor 24 drives the crushing shaft 23 and the crushing blade 231 to rotate. The crushing blade 231 crushes the material. The crushed material is discharged into the drum 12 through the feed pipe 211 for drying.

[0039] Reference Figures 1 to 5 The conveying mechanism is used to transport the material discharged from the outlet 131 of the drying chamber to the crushing chamber 21. More specifically, the conveying mechanism can adopt the following structure: the conveying mechanism includes a two-axis linear module 30, a transfer bucket 40 and a belt conveyor 50. The two-axis linear module 30 is connected to the transfer bucket 40 and is used to drive the transfer bucket 40 to move laterally and vertically. The bottom of the transfer bucket 40 is provided with a discharge port. A baffle 41 can be opened and closed at the discharge port of the transfer bucket 40. The belt conveyor 50 is used to transport the material discharged from the outlet 131 of the drying chamber to the transfer bucket 40.

[0040] During the drying process, the material is discharged from the discharge port 131 under the action of the spiral blades 122, and then conveyed to the transfer bucket 40 by the belt conveyor 50. Then, the transfer bucket 40 is moved by the two-axis linear module 30 to the top of the crushing chamber 21, and the baffle 41 is opened, so that the material in the transfer bucket 40 falls into the crushing chamber 21 from the discharge port. The material is crushed again by the crushing component, and then the material enters the drum 12 for further drying. The material is repeatedly crushed and dried, and the larger filter cake blocks in the material are continuously broken into smaller pieces before drying, thereby effectively improving the drying effect and minimizing the occurrence of insufficient drying.

[0041] In an optional embodiment, the belt conveyor 50 has the following specific structure: the belt conveyor 50 includes a fourth frame 51, rollers 52, a conveyor belt 53 and a conveyor drive motor 54. The rollers 52 are rotatably mounted on the fourth frame 51, the conveyor belt 53 is wound around the rollers 52, and the conveyor drive motor 54 is fixed on the fourth frame 51 and connected to the rollers 52.

[0042] In an optional embodiment, the material discharged from the outlet 131 of the drying chamber can be fed onto the belt conveyor 50 via the following structure, and then transported to the transfer hopper 40 by the belt conveyor 50:

[0043] The housing 13 is provided with a transfer chamber 132 connected to the discharge port 131. The transfer chamber 132 is provided with a discharge assembly 70 for conveying the material in the transfer chamber 132 to the belt conveyor 50. The discharge assembly 70 includes a discharge valve 71, a valve plate 72 and a switching drive component. The bottom of the transfer chamber 132 is provided with a discharge pipe 134. The discharge valve 71 is provided on the discharge pipe 134. The discharge pipe 134 is provided with a return port 135 and a discharge outlet 136. The return port 135 is used to discharge the material in the transfer chamber 132 to the belt conveyor 50.

[0044] The valve plate 72 is mounted on the discharge pipe 134. The switching drive is used to drive the valve plate 72 to close the return port 135 or the discharge port 136. More specifically, the switching drive is a switching drive motor 73 fixed on the discharge pipe 134. The valve plate 72 is provided with a valve shaft 721. The valve plate 72 can be flipped on the discharge pipe 134 through the valve shaft 721 and is located between the return port 135 and the discharge port 136. The switching drive motor 73 is connected to the valve shaft 721.

[0045] Material discharged from the discharge port 131 of the drying chamber falls into the transfer chamber 132. When it is necessary to discharge the material in the transfer chamber 132 onto the belt conveyor 50, the valve shaft 721 and valve plate 72 are driven to rotate by switching the drive motor 73, so that the valve plate 72 closes the discharge port 136. At this time, the discharge pipe 134 is connected to the return port 135. Then the unloading valve 71 is opened so that the material in the transfer chamber 132 is discharged onto the conveyor belt 53 of the belt conveyor 50.

[0046] In an optional embodiment, the specific structure of the two-axis linear module 30 and its specific connection relationship with the transfer bucket 40 are as follows: The two-axis linear module 30 includes a third frame 31, a vertical lead screw 32, a lifting drive motor 33, a lifting frame 34, and a horizontal electric push rod 35. The third frame 31 is provided with a vertical guide column 311, the lifting frame 34 is slidably sleeved on the vertical guide column 311, and a threaded sleeve 341 is provided on the lifting frame 34. The vertical lead screw 32 is rotatably mounted on the third frame 31 and screwed to the threaded sleeve 341. The lifting drive motor 33 is fixedly mounted on the third frame 31 and connected to the vertical lead screw 32. The transfer bucket 40 is provided with a horizontal guide rod 42, which slidably passes through the lifting frame 34. The horizontal electric push rod 35 is fixedly mounted on the lifting frame 34, and the telescopic rod 351 of the horizontal electric push rod 35 is fixedly connected to the transfer bucket 40.

[0047] Reference Figure 2 , Figure 5 and Figure 6After the material is conveyed into the transfer bucket 40 by the belt conveyor 50, the transfer bucket 40 can be driven to move laterally by the horizontal electric push rod 35, and the lifting frame 34 and the transfer bucket 40 can be driven to move vertically by the lifting drive motor 33, thereby moving the transfer bucket 40 above the crushing chamber 21. Then, the baffle 41 is opened by the opening and closing component 60, allowing the material in the transfer bucket 40 to fall from the discharge port into the crushing chamber 21. In an optional embodiment, the specific structure of the opening and closing component 60 and the working principle of controlling the opening of the baffle 41 by the opening and closing component 60 are as follows:

[0048] The opening and closing assembly 60 includes a rack 61, a rotating shaft 62, and an elastic element. A pivot 411 is provided on the baffle 41, and the baffle 41 is hinged to the transfer bucket 40 through the pivot 411. A worm gear 412 is provided on the pivot 411, and a guide sleeve 413 is provided on the transfer bucket 40. The rack 61 is slidably disposed on the guide sleeve 413 of the transfer bucket 40. The rotating shaft 62 is rotatably disposed on the transfer bucket 40. A worm 621 that meshes with the worm gear 412 and a linkage gear 622 that meshes with the rack 61 are provided on the rotating shaft 62.

[0049] The elastic element is used to provide the elastic force to push the baffle 41 to close at the feed port. More specifically, the elastic element is a spring 63. The transfer bucket 40 is provided with a first boss 43, the rack 61 is provided with a second boss 611, the second boss 611 is provided with a column 612, the column 612 slides through the first boss 43, the spring 63 is sleeved on the outside of the column 612, and the two ends of the spring 63 abut against the first boss 43 and the second boss 611 respectively.

[0050] The crushing chamber 21 is provided with a limiting part that can abut against the rack 61. The upper part of the crushing chamber 21 is provided with a feed hopper 212 with an opening on one side. The limiting part is the side wall of the feed hopper 212 opposite to the opening side.

[0051] During the process of moving the transfer bucket 40 above the crushing chamber 21 via the two-axis linear module 30, the transfer bucket 40 is first driven vertically upward by the lifting drive motor 33 to a position level with the feed hopper 212. Then, the transfer bucket 40 is driven to move laterally by the horizontal electric push rod 35, so that the transfer bucket 40 passes through the opening and enters the feed hopper 212. After the transfer bucket 40 enters the feed hopper 212, it continues to move. During this process, the rack 61 first abuts against the limiting part, and then the rack 61 moves relative to the transfer bucket 40, compressing the spring 63. At the same time, the rack 61 drives the linkage gear 622, the rotating shaft 62, and the worm gear 621 to rotate. The worm gear 621 drives the worm wheel 412 and the pivot 411 to rotate, opening the baffle 41 and allowing the material in the transfer bucket 40 to fall into the crushing chamber 21.

[0052] The implementation principle of the drying device for producing calcium carbonate, a food additive, in this embodiment is as follows: The material to be dried is put into the crushing chamber 21, where it is crushed by the crushing components. The crushed material is then discharged into the drum 12 through the feed pipe 211. The air inlet 133 is connected to a hot air source, and hot air enters the drum 12 through the air inlet 133 to dry the material. During the drying process, the drum 12 is driven to rotate by the rotary drive motor 15. As the drum 12 rotates, the lifting plates 123 flip the material, and the spiral blades 122 slowly convey the material forward, causing it to exit the drum 12 from the discharge port 131 and fall into the transfer chamber 132. Next, by switching the drive motor 73 to drive the valve shaft 721 and valve plate 72 to rotate, the valve plate 72 closes the discharge port 136, and the discharge pipe 134 is connected to the return port 135. Then, the discharge valve 71 is opened, so that the material in the transfer bin 132 is discharged onto the conveyor belt 53 of the belt conveyor 50, and then transported to the transfer bucket 40 by the conveyor belt 53.

[0053] Next, the lifting drive motor 33 drives the transfer bucket 40 to rise vertically to a position level with the feed hopper 212. Then, the horizontal electric push rod 35 drives the transfer bucket 40 to move laterally, allowing it to pass through the opening and enter the feed hopper 212. The opening and closing assembly 60 then opens the baffle 41, allowing the material in the transfer bucket 40 to fall into the crushing chamber 21. The material is then crushed again by the crushing assembly and enters the drum 12 for further drying. This repeated crushing and drying process continuously breaks down larger filter cake blocks into smaller pieces before drying, improving the drying effect and minimizing incomplete drying. During the movement of the transfer bucket 40 driven by the two-axis linear module 30, the belt conveyor 50 is stopped, and the discharge valve 71 is closed.

[0054] After the material is dried, the valve shaft 721 and valve plate 72 are rotated by switching the drive motor 73, so that the valve plate 72 closes the return port 135 and connects the discharge pipe 134 with the discharge port 136. Then the discharge valve 71 is opened, so that the dried material in the drum 12 is discharged to the next process through the transfer chamber 132, the discharge pipe 134 and the discharge port 136.

[0055] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drying device for producing a food additive calcium carbonate, characterized by, The utility model relates to a kind of drying mechanism and its conveying mechanism, including: Drying mechanism (10), the drying mechanism (10) includes drying bin, and inlet (121) and discharge outlet (131) are equipped on the drying bin; Pulverization mechanism (20), the pulverization mechanism (20) includes pulverization bin (21) and is equipped on the pulverization bin (21) pulverization subassembly, the pulverization bin (21) with the inlet (121) of the drying bin communication; Conveying mechanism, the conveying mechanism is used to convey material from the discharge outlet (131) of the drying bin to the pulverization bin (21).

2. The drying device for producing food additive calcium carbonate according to claim 1, characterized in that, The conveying mechanism includes two-axis linear module (30), transfer hopper (40) and belt conveyor (50), the two-axis linear module (30) is connected with the transfer hopper (40), and is used to drive the transfer hopper (40) transverse and vertical movement, the bottom of the transfer hopper (40) is equipped with discharge port, the discharge port of the transfer hopper (40) can be open and closed with baffle (41), and the belt conveyor (50) is used to convey material from the discharge outlet (131) of the drying bin to the transfer hopper (40).

3. The drying device for producing food additive calcium carbonate according to claim 2, characterized in that, The conveying mechanism further includes open-close component (60), the open-close component (60) includes rack (61), rotating shaft (62) and elastic member, the baffle (41) is hinged with the transfer hopper (40) by pivot (411), the pivot (411) is equipped with worm wheel (412), the rack (61) is slidably arranged on the transfer hopper (40), the rotating shaft (62) is rotatably arranged on the transfer hopper (40), the rotating shaft (62) is equipped with worm (621) meshing with the worm wheel (412) and linkage gear (622) meshing with the rack (61), and the elastic member is used to provide the elastic force that pushes the baffle (41) to close in the discharge port, the pulverization bin (21) is equipped with limiting portion capable of abutting against the rack (61).

4. The drying device for producing food additive calcium carbonate according to claim 3, characterized in that, The elastic member is spring (63), the transfer hopper (40) is equipped with first boss (43), the rack (61) is equipped with second boss (611), the second boss (611) is equipped with column (612), the column (612) is slidably arranged in the first boss (43), the spring (63) is sleeved on the outside of column (612), and the both ends of the spring (63) are respectively abutted with the first boss (43) and the second boss (611).

5. The drying device for producing food additive calcium carbonate according to claim 3, characterized in that, The upper portion of the pulverization bin (21) is equipped with one-side opening feed hopper (212), and the limiting portion is the side wall opposite to the opening side on the feed hopper (212).

6. The drying device for producing food additive calcium carbonate according to claim 2, characterized in that, The drying mechanism (10) further comprises a first frame (11), the drying bin comprises a drum (12) and a cover (13), the drum (12) is rotatably arranged on the first frame (11), the cover (13) is fixedly arranged on the first frame (11) and sleeved on the end of the drum (12), the discharge port (131) is located at the bottom of the cover (13), the cover (13) is provided with a transfer bin (132) in communication with the discharge port (131), and the transfer bin (132) is provided with a discharging assembly (70) for conveying materials in the transfer bin (132) to the belt conveyor (50).

7. The drying device for producing food additive calcium carbonate according to claim 6, characterized in that, The discharging assembly (70) comprises a discharge valve (71), a valve plate (72) and a switching driving member, the bottom of the transfer bin (132) is provided with a discharging pipe (134), the discharge valve (71) is arranged on the discharging pipe (134), the discharging pipe (134) is provided with a material return port (135) and a discharge port (136), the material return port (135) is used for discharging materials in the transfer bin (132) onto the belt conveyor (50), the valve plate (72) is arranged on the discharging pipe (134), and the switching driving member is used for driving the valve plate (72) to close the material return port (135) or the discharge port (136).

8. The drying device for producing food additive calcium carbonate according to claim 6, characterized in that, The drying mechanism (10) further comprises a rotary driving member, the rotary driving member is connected with the drum (12) and is used for driving the drum (12) to rotate, and the inner circumferential wall of the drum (12) is provided with a spiral blade (122) and a wiper (123) arranged along a spiral line at intervals.

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