Preparation device of food-grade carbon dioxide

Abstract

The utility model provides a preparation device of food-grade carbon dioxide, and relates to the technical field of carbon dioxide production, the preparation device of food-grade carbon dioxide comprises a rack, a preparation tank is installed on the rack, the top side of the preparation tank is provided with a drying and impurity-removing structure, the drying and impurity-removing structure is used for removing water vapor and impurities in gas, and the preparation tank is provided with an air inlet and an air outlet. The uppermost drying and impurity removing structure is connected with a gas inlet assembly, and the gas inlet assembly is used for introducing gas into the drying and impurity removing structures; by arranging an isolation flow guide cover, an exhaust pipe and a one-way valve, the influence of low-temperature and low-pressure environments in the preparation tank on the drying and impurity removing structure can be avoided, gas can only enter the preparation tank through the exhaust pipe, the condition of gas backflow is avoided, the gas can be dried by arranging a plurality of drying layers, and the drying efficiency is improved. Therefore, the condition that water is doped in the liquid carbon dioxide in the carbon dioxide production process is avoided, and the quality of the prepared food-grade carbon dioxide is better.

Description

Technical Field

[0001] This utility model relates to the field of carbon dioxide production technology, specifically a device for preparing food-grade carbon dioxide. Background Technology

[0002] Carbon dioxide has high civilian and industrial value and is widely used in many fields. Food-grade carbon dioxide is the most widely used. Carbon dioxide is a commonly used gas in the food processing industry. Under standard conditions, carbon dioxide is in a gaseous state, and the volume of a unit mass of carbon dioxide gas is hundreds of times that of the liquefied state. The carbon dioxide used in cutting-edge technology is also obtained by further purification of food-grade carbon dioxide. Therefore, large-scale production of food-grade carbon dioxide is very necessary.

[0003] Patent document CN220214425U discloses a food-grade carbon dioxide preparation device. This device uses an adsorption structure to adsorb impurities in carbon dioxide and introduce them into a preparation tower for carbon dioxide preparation and purification, thereby improving the carbon dioxide extraction efficiency.

[0004] Carbon dioxide is often mixed with water vapor during production. The aforementioned technical solutions only address these impurities. However, the interior of the preparation tower and the main body of the device is a low-temperature environment. When water vapor adheres to the inner wall of the preparation tower and the main body of the device, it easily forms water droplets. These water droplets mix with the liquid carbon dioxide, reducing the purity of the prepared liquid carbon dioxide. Furthermore, the connection between the preparation tower and the adsorption structure keeps the interior of the adsorption structure at a low temperature, which can easily cause carbon dioxide gas to liquefy within the adsorption structure, thus affecting the adsorption effect of the adsorption layer. Therefore, a food-grade carbon dioxide preparation device is needed to solve these problems. Utility Model Content

[0005] The purpose of this invention is to provide a device for preparing food-grade carbon dioxide, which aims to solve the problems in the prior art.

[0006] To achieve the above objectives, one embodiment of the present invention provides an apparatus for preparing food-grade carbon dioxide, comprising:

[0007] frame;

[0008] Preparation tank;

[0009] A drying and impurity removal structure is provided on the top side of the preparation tank, and the drying and impurity removal structure is used to remove water vapor and impurities from the gas;

[0010] An isolation guide hood is installed at the top of the preparation tank. The isolation guide hood is used to prevent heat exchange between the preparation tank and the drying and impurity removal structure.

[0011] An exhaust pipe is connected to the bottom of an isolation guide shroud. A one-way valve is installed on the exhaust pipe. The one-way valve and the exhaust pipe are used to prevent gas inside the preparation tank from entering the interior of the drying and impurity removal structure.

[0012] Preferably, the drying and impurity removal structure includes multiple storage basket structures, a filter screen, an adsorption layer, and multiple drying layers. The multiple storage basket structures are evenly arranged along the height direction of the preparation tank. Each storage basket structure has an isolation net installed inside. The filter screen is installed inside one storage basket structure, the adsorption layer is installed inside one storage basket structure, and the multiple drying layers are respectively installed inside the remaining storage basket structures.

[0013] Preferably, the storage basket structure includes a bottom mounting ring, a rotating connecting rod, a storage basket, a connecting frame, and a connecting sealing assembly. The bottom mounting ring has annular sealing grooves on both its top and bottom sides. The rotating connecting rod is mounted on the outer surface of the bottom mounting ring, and a sleeve is rotatably connected to the outer surface of the rotating connecting rod. The storage basket is connected to the sleeve. The connecting frame is mounted on the outer surface of the bottom mounting ring. The connecting sealing assembly is disposed on the storage basket and is used to connect the storage basket to the bottom mounting ring and ensure a tight seal between the storage basket and the bottom mounting ring.

[0014] Preferably, the connecting sealing assembly includes an annular storage groove, an annular sealing ring, a guide groove, a guide rod, a fixing spring, and a movable plate. There are two annular storage grooves, respectively located on the top and bottom sides of the storage basket. There are also two annular sealing rings, which are slidably connected to the annular storage grooves, each corresponding to one of the grooves. The guide groove is located on the outer surface of the storage basket and communicates with the annular storage groove. Both the guide rod and the fixing spring are connected to the inner wall of the guide groove. The movable plate is slidably connected to the outer surface of the guide rod, and its end is connected to the outer surface of the annular sealing ring.

[0015] Preferably, the preparation vessel includes an inner vessel, an outer vessel, and a vacuum interlayer, wherein the outer vessel is connected to the inner vessel, and the vacuum interlayer is disposed between the inner vessel and the outer vessel.

[0016] Preferably, the air intake assembly includes an air intake shroud and a fan, the air intake shroud being connected to the uppermost bottom mounting ring, and the fan being connected to the air intake shroud via a pipe.

[0017] Preferably, the preparation tank is provided with a cooling and depressurization component, which includes a vacuum pump and a refrigerator structure, both of which are connected to the preparation tank.

[0018] Preferably, a controller is installed on the frame, and a pressure sensor and a temperature sensor are provided on the preparation tank. The temperature sensor and the pressure sensor are both electrically connected to the controller. The controller is electrically connected to the vacuum pump and the refrigeration unit structure.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. By setting up an isolation guide hood, exhaust pipe and one-way valve, the low temperature and low pressure environment inside the preparation tank can be avoided from affecting the drying and impurity removal structure. This ensures that the gas can only enter the interior of the preparation tank through the exhaust pipe, avoiding gas backflow. Furthermore, by setting up multiple drying layers, the gas can be dried, thereby avoiding the mixing of water into the liquid carbon dioxide during the carbon dioxide production process, thus making the quality of the prepared food-grade carbon dioxide better.

[0021] 2. By setting a bottom mounting ring, rotating connecting rod, annular sealing groove, storage basket and connecting sealing assembly, not only is the sealing between two adjacent storage basket structures relatively good, but the storage basket can also be rotated, which facilitates the replacement of the adsorption layer, drying layer or isolation net, thus improving the practicality of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the drying and impurity removal structure of this utility model;

[0025] Figure 4 This is a cross-sectional structural diagram of the drying and impurity removal structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the rotating structure of the storage basket of this utility model;

[0027] Figure 6 This utility model Figure 4 Enlarged structural diagram at point A;

[0028] Figure 7 This is a schematic diagram of the preparation tank of this utility model.

[0029] In the diagram: 10. Frame; 11. Controller; 20. Preparation tank; 201. Inner tank; 202. Outer tank; 203. Vacuum jacket; 21. Isolation guide hood; 22. Exhaust pipe; 23. One-way valve; 25. Vacuum pump; 26. Refrigeration unit structure; 27. Pressure sensor; 28. Temperature sensor; 30. Drying and impurity removal structure; 31. Isolation net; 32. Filter screen; 33. Adsorption layer; 34. Drying layer; 35. Bottom mounting ring; 351. Annular sealing groove; 352. Rotating connecting rod; 36. Storage basket; 361. Annular storage groove; 362. Annular sealing ring; 363. Guide groove; 364. Guide rod; 365. Fixing spring; 366. Moving plate; 37. Connecting frame; 38. Air inlet hood; 39. Fan. Detailed Implementation

[0030] The present invention will now be further described with reference to the accompanying drawings.

[0031] like Figures 1 to 7 As shown, a food-grade carbon dioxide preparation apparatus includes a frame 10, on which a preparation tank 20 is mounted. A drying and impurity removal structure 30 is provided on the top side of the preparation tank 20. The drying and impurity removal structure 30 is used to remove water vapor and impurities from the gas. An air inlet assembly is connected to the top of the drying and impurity removal structure 30, which is used to introduce gas into the interior of the drying and impurity removal structure 30. An isolation guide hood 21 is provided inside the preparation tank 20. The isolation guide hood 21 is made of a material with good heat insulation properties, such as a heat insulation board. The isolation guide hood 21 is used to prevent heat exchange between the preparation tank 20 and the drying and impurity removal structure 30. An exhaust pipe 22 is connected to the bottom end of the isolation guide hood 21. A one-way valve 23 is provided on the exhaust pipe 22, which ensures that the gas can only enter the interior of the preparation tank 20 through the drying and impurity removal structure 30.

[0032] The drying and impurity removal structure 30 includes multiple storage basket structures, which are evenly arranged along the height of the preparation tank 20. Each storage basket structure has an isolation net 31 installed inside. One of the storage basket structures has a filter screen 32 installed inside, and another storage basket structure has multiple adsorption layers 33 installed inside. The adsorption layers 33 are used to remove impurities from the gas. The remaining storage basket structures have a drying layer 34 installed inside. The drying layer 34 can be a granular desiccant such as molecular sieve or silica gel particles. The drying layer 34 is used to dry the gas and remove water vapor from the gas. The adsorption layer 33 is located between the drying layer 34 and the filter screen 32, and the filter screen 32 is located above the adsorption layer 33.

[0033] The gas introduced into the drying and impurity removal structure 30 passes through the filter screen 32 and the adsorption layer 33 in sequence to remove impurities from the gas. After the impurities are removed, the gas passes through multiple drying layers 34 to remove water vapor mixed in with the gas. The dried gas enters the preparation tank 20 under the action of the isolation guide hood 21 and the exhaust pipe 22. The low pressure and low temperature environment inside the preparation tank 20 liquefies carbon dioxide. The drying process makes the prepared food-grade carbon dioxide liquid purer.

[0034] The storage basket structure includes a bottom mounting ring 35. Both the top and bottom sides of the bottom mounting ring 35 have annular sealing grooves 351. A rotating connecting rod 352 is connected to the outer surface of the bottom mounting ring 35. The rotating connecting rod 352 has a T-shaped cross-section. A sleeve is rotatably connected to the outer surface of the rotating connecting rod 352. A ring-shaped storage basket 36 is fixedly connected to one side of the sleeve. A connecting sealing assembly is provided on the storage basket 36. The connecting sealing assembly is used to connect the storage basket 36 and the bottom mounting ring 35, and to ensure the sealing between the storage basket 36 and the bottom mounting ring 35. A connecting frame 37 is connected to the outer surface of the bottom mounting ring 35, and the connecting frame 37 is used to connect two adjacent bottom mounting rings 35.

[0035] The connecting sealing assembly includes annular storage grooves 361 formed on the top and bottom sides of the storage basket 36 and two guide grooves 363 formed on the outer surface of the storage basket 36. The guide grooves 363 are connected to the annular storage grooves 361 and correspond one-to-one. Annular sealing rings 362 are slidably connected to the inner walls of the two annular storage grooves 361. The size of the annular sealing rings 362 is adapted to the annular sealing grooves 351. Guide rods 364 and fixed springs 365 are fixedly connected to the inner walls of the two guide grooves 363. Movable plates 366 connected to the annular sealing rings 362 are slidably connected to the outer surfaces of the two guide rods 364. One end of the fixed spring 365 away from the inner wall of the guide groove 363 is fixedly connected to the movable plate 366. A part of the guide rod 364 is located inside the fixed spring 365.

[0036] Under normal conditions, the annular sealing ring 362 is inserted into the annular sealing groove 351, thus ensuring the sealing between the multiple annular storage basket structures. When it is necessary to replace the drying layer 34, the adsorption layer 33, or the filter screen 32, the moving plate 366 moves the annular sealing ring 362, causing it to move out of the annular sealing groove 351 and retract into the annular storage groove 361. At this time, the fixing spring 365 is compressed, and the storage basket 36 is no longer connected to the bottom mounting ring 35. Then, the storage basket 36 can be rotated. The structural diagram of the rotating storage basket 36 is shown below. Figure 5As shown, this facilitates the replacement of the drying layer 34, adsorption layer 33, or filter screen 32. After replacement, the storage basket 36 is rotated and reset. At this time, the annular sealing ring 362 corresponds to the position of the annular sealing groove 351. Then, the moving plate 366 is slowly released. Under the reaction force of the fixed spring 365, the annular sealing ring 362 is inserted into the interior of the annular sealing groove 351. This ensures the sealing between the bottom mounting ring 35 and the storage basket 36 while connecting the storage basket 36 and the bottom mounting ring 35.

[0037] It should be noted that the height of the annular sealing ring 362 is greater than the depth of the annular sealing groove 351. After the annular sealing ring 362 is inserted into the annular sealing groove 351, the annular sealing ring 362 can block the guide groove 363, thereby better ensuring the sealing between the bottom mounting ring 35 and the storage basket 36. Furthermore, the bottom mounting ring 35, located at the very bottom, is connected to the top of the preparation tank 20.

[0038] The preparation tank 20 includes an inner tank 201, an outer tank 202 connected to the inner tank 201, and a vacuum interlayer 203 between the inner tank 201 and the outer tank 202. The vacuum interlayer 203 is filled with heat-insulating materials such as perlite to prevent the preparation tank 20 from exchanging temperature with the outside world.

[0039] The air intake assembly includes an air intake shroud 38 connected to a bottom mounting ring 35 located at the top. The air intake shroud 38 is connected to a fan 39 via a pipe. An air intake pipe is connected to the fan 39, and the fan 39 accelerates the airflow speed.

[0040] The preparation tank 20 is equipped with a cooling and depressurization assembly, which includes a vacuum pump 25 connected to the preparation tank 20. The vacuum pump 25 is connected to the interior of the preparation tank 20 through a pipe. The vacuum pump 25 is used to change the pressure inside the preparation tank 20. A refrigerator structure 26 is connected to the preparation tank 20. The refrigerator structure 26 is used to reduce the temperature inside the preparation tank 20. The refrigerator structure 26 and the vacuum pump 25 can provide a low-pressure and low-temperature environment inside the preparation tank 20, which facilitates the liquefaction of carbon dioxide liquid.

[0041] A controller 11 is installed on the frame 10, and a pressure sensor 27 and a temperature sensor 28 are installed on the preparation tank 20. Both the temperature sensor 28 and the pressure sensor 27 are electrically connected to the controller 11. The controller 11 is electrically connected to the vacuum pump 25 and the refrigeration structure 26.

[0042] The controller 11 can set the pressure and temperature inside the preparation tank 20, thereby enabling the controller 11 to control the vacuum pump 25 and the refrigeration structure 26 based on the signals from the pressure sensor 27 and the temperature sensor 28.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for producing food grade carbon dioxide, characterized by, include: Rack (10); Preparation tank (20); A drying and impurity removal structure (30) is provided on the top side of the preparation tank (20), and the drying and impurity removal structure (30) is used to remove water vapor and impurities from the gas; An air intake assembly is installed on top of the drying and impurity removal structure (30), the air intake assembly being used to introduce gas into the interior of the drying and impurity removal structure (30); An isolation guide hood (21) is installed at the top of the preparation tank (20). The isolation guide hood (21) is used to prevent heat exchange between the preparation tank (20) and the drying and impurity removal structure (30). An exhaust pipe (22) is connected to the bottom end of an isolation guide shroud (21). A one-way valve (23) is provided on the exhaust pipe (22). The one-way valve (23) and the exhaust pipe (22) are used to prevent gas inside the preparation tank (20) from entering the interior of the drying and impurity removal structure (30).

2. A device for producing food grade carbon dioxide as claimed in claim 1, wherein: The drying and impurity removal structure (30) includes multiple storage basket structures, a filter screen (32), an adsorption layer (33), and multiple drying layers (34). The multiple storage basket structures are evenly arranged along the height direction of the preparation tank (20). Each storage basket structure has an isolation net (31) installed inside. The filter screen (32) is installed inside one storage basket structure, the adsorption layer (33) is installed inside one storage basket structure, and the multiple drying layers (34) are installed inside the remaining storage basket structures respectively.

3. A device for producing food grade carbon dioxide as claimed in claim 2, wherein: The storage basket structure includes a bottom mounting ring (35), a rotating connecting rod (352), a storage basket (36), a connecting frame (37), and a connecting sealing assembly. The bottom mounting ring (35) has an annular sealing groove (351) on both its top and bottom sides. The rotating connecting rod (352) is installed on the outer surface of the bottom mounting ring (35), and a sleeve is rotatably connected to the outer surface of the rotating connecting rod (352). The storage basket (36) is connected to the sleeve. The connecting frame (37) is installed on the outer surface of the bottom mounting ring (35). The connecting sealing assembly is set on the storage basket (36). The connecting sealing assembly is used to connect the storage basket (36) and the bottom mounting ring (35) and ensure the sealing between the storage basket (36) and the bottom mounting ring (35).

4. A device for producing food grade carbon dioxide as claimed in claim 3, wherein: The connecting sealing assembly includes an annular storage groove (361), an annular sealing ring (362), a guide groove (363), a guide rod (364), a fixing spring (365), and a moving plate (366). There are two annular storage grooves (361), which are respectively located on the top and bottom sides of the storage basket (36). There are two annular sealing rings (362), which are slidably connected to the annular storage grooves (361). The sealing ring (362) corresponds one-to-one with the annular storage groove (361). The guide groove (363) is opened on the outer surface of the storage basket (36). The guide groove (363) is connected to the annular storage groove (361). The guide rod (364) and the fixing spring (365) are both connected to the inner wall of the guide groove (363). The moving plate (366) is slidably connected to the outer surface of the guide rod (364), and the end of the moving plate (366) is connected to the outer surface of the annular sealing ring (362).

5. The apparatus of claim 2, wherein: The preparation tank (20) includes an inner tank (201), an outer tank (202), and a vacuum interlayer (203). The outer tank (202) is connected to the inner tank (201), and the vacuum interlayer (203) is disposed between the inner tank (201) and the outer tank (202).

6. A device for producing food grade carbon dioxide as claimed in claim 5 wherein: The air intake assembly includes an air intake shroud (38) and a fan (39). The air intake shroud (38) is connected to the uppermost bottom mounting ring (35), and the fan (39) is connected to the air intake shroud (38) through a pipe.

7. A device for producing food grade carbon dioxide as claimed in claim 5 wherein: The preparation tank (20) is equipped with a cooling and depressurization assembly, which includes a vacuum pump (25) and a refrigerator structure (26). Both the vacuum pump (25) and the refrigerator structure (26) are connected to the preparation tank (20).

8. A device for producing food grade carbon dioxide as claimed in claim 7, wherein: A controller (11) is installed on the frame (10), and a pressure sensor (27) and a temperature sensor (28) are provided on the preparation tank (20). The temperature sensor (28) and the pressure sensor (27) are both electrically connected to the controller (11). The controller (11) is electrically connected to the vacuum pump (25) and the controller (11) is electrically connected to the refrigeration structure (26).

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