An apparatus for producing food-grade carbon dioxide

Abstract

The utility model provides a kind of preparation device of food-grade carbon dioxide, belong to gas preparation technical field, including, protective shell, inner shell and pressure tank, inner shell is embedded in the inner wall of protective shell, pressure tank is embedded in the outer wall of protective shell, circulating component, is located in the inner wall of protective shell, wherein: circulating component includes circulating pipe, rotating stand, moving frame, quick connector, return spring, quick connection filter element, buffer tank and drive assembly.Circulating component significantly reduces carbon dioxide loss by pressure relief gas recovery and cold energy recycling mechanism, actively introduces the release gas into buffer tank storage before the pressure tank is overpressure due to warming, drives refrigeration cycle using recycled high-pressure carbon dioxide, gas continuously reduces the temperature of heat preservation medium in protective shell after expansion heat absorption through circulating pipe, weaken the demand of pressure relief from source, integrated quick-change filter element structure, when replacing, residual gas in filter element is introduced into buffer tank through tee solenoid valve to realize zero emission recovery.

Description

Technical Field

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

[0002] Food-grade carbon dioxide is widely used in beverage carbonation, food preservation, cryogenic pulverization, and inert protection. Its preparation typically involves steps such as raw gas purification, drying, liquefaction, and high-pressure storage. Storage commonly utilizes pressure tanks (such as cylinders or storage tanks) to hold liquefied or high-pressure gaseous carbon dioxide. However, this storage method has a significant drawback: fluctuations in ambient temperature, especially temperature increases, cause the gas temperature inside the tank to rise accordingly. According to gas law equations (such as the ideal gas law or the real gas law), the temperature increase directly causes a sharp rise in pressure inside the tank. To ensure tank safety, when the pressure exceeds the design threshold, the safety relief valve is forced to open to release pressure, releasing a large amount of high-pressure carbon dioxide gas.

[0003] The main drawbacks of existing technologies are as follows: Gas waste and increased costs: Passive pressure relief from safety valves is an uncontrollable process that results in the direct release of large amounts of high-purity, food-grade carbon dioxide into the atmosphere. This not only leads to the waste of expensive raw materials and significantly increases production costs, but also contradicts the principles of resource conservation and environmental protection. Frequent temperature fluctuations exacerbate this waste.

[0004] Energy waste: The released high-pressure carbon dioxide gas contains a considerable amount of energy (pressure energy and cold energy). In current technology, this energy is completely dissipated into the environment during the release process and cannot be recovered or utilized in any way, which is a huge waste of energy.

[0005] The lack of active temperature control exacerbates pressure relief: Existing storage devices often rely solely on the tank insulation layer to slow down temperature rise, lacking an active and efficient cooling mechanism to suppress the increase in internal temperature and pressure caused by ambient temperature rise. This makes the system more prone to reaching the pressure relief threshold, resulting in more frequent passive pressure relief and further amplifying the aforementioned waste of gas and energy.

[0006] Residual gas loss during maintenance: When replacing consumables such as desiccants and filters (e.g., quick-connect filter cartridges), existing systems or operating procedures often struggle to effectively recover the high-pressure carbon dioxide gas remaining in the filter cartridges and connecting pipelines. This residual gas is often directly vented during disassembly, causing additional, avoidable losses.

[0007] Operational complexity and efficiency: Replacing consumables usually requires interrupting the process, depressurizing, or performing complex operations, which affects production efficiency. Utility Model Content

[0008] The purpose of this invention is to provide a device for preparing food-grade carbon dioxide, which aims to solve the problems raised in the background art.

[0009] An apparatus for preparing food-grade carbon dioxide, comprising, The protective shell, the inner shell, and the pressure tank are provided, wherein the inner shell is embedded in the inner wall of the protective shell, and the pressure tank is embedded in the outer wall of the protective shell. A circulation assembly, located on the inner wall of the protective shell, comprises: a circulation pipe, a rotating frame, a movable frame, a quick connector, a return spring, a quick-connect filter element, a buffer tank, and a drive assembly. The circulation pipe is embedded in the inner wall of the protective shell; the rotating frame is rotatably embedded in the inner wall of the inner shell; the movable frame is slidably embedded in a slot on the inner wall of the rotating frame; the quick connector is slidably inserted into the openings on the outer walls of both ends of the movable frame; the return spring is sleeved on the outer wall of the quick connector; the quick connector is connected to the quick-connect filter element; the buffer tank is embedded at the bottom of the inner wall of the inner shell; the drive assembly is located on the inner wall of the inner shell; the cavity on the inner wall of the protective shell is filled with a heat-insulating medium; the buffer tank is connected to the inner wall of the circulation pipe via a valve and a hose; and the output end of the circulation pipe is connected to an external carbon dioxide collection device via a hose and a valve.

[0010] Furthermore, the drive assembly includes a slide rail, a moving motor, a moving block, a drive rod, a magnetic block, a gear ring, an adjusting motor, and a drive gear.

[0011] Furthermore, the slide rail is fixedly mounted on the inner wall of the inner shell by a bracket, the moving motor is fixedly mounted on the top outer wall of the slide rail, the moving block is slidably embedded in the inner wall of the slide rail, one end of the drive rod is rotatably inserted into the outer wall of the moving block, the other end of the drive rod is rotatably inserted into the outer wall of the magnetic block, and the output end of the moving motor is connected to the opening of the inner wall of the moving block by a bidirectional screw thread.

[0012] Furthermore, the gear ring is embedded in the inner wall of the rotating frame, the adjusting motor is fixedly mounted on the inner wall of the inner shell by a bracket, the driving gear is fixedly mounted on the outer wall of the output end of the adjusting motor, and the gear ring and the driving gear are meshed and connected.

[0013] Furthermore, one end of six of the quick connectors is connected to an external carbon dioxide supply device via a hose and a valve, one end of the remaining six quick connectors is connected to a pressure tank via a three-way solenoid valve, and one end of the remaining six quick connectors is connected to a buffer tank via a three-way solenoid valve.

[0014] Furthermore, the outer wall of the protective shell is provided with an operating groove, and a sealing cover is slidably embedded in the inner wall of the operating groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are: The circulation component significantly reduces carbon dioxide loss through a mechanism of depressurized gas recovery and cold energy reuse. Its core beneficial effects are reflected in three aspects: First, it actively guides the depressurized gas into a buffer tank for storage before the pressure tank becomes overpressured due to temperature rise, avoiding gas escape caused by the safety valve tripping and directly reducing raw material loss. Second, it uses the recovered high-pressure carbon dioxide to drive the refrigeration cycle. After the gas expands and absorbs heat through the circulation pipe, it continuously reduces the temperature of the insulation medium inside the protective shell, forming cold energy feedback to inhibit the temperature rise of the pressure tank and weaken the need for depressurization from the source. Third, it integrates a quick-change filter structure. When replacing the filter, the residual gas in the filter is guided into the buffer tank through a three-way solenoid valve to achieve zero-emission recovery. Combined with the magnetic block adsorption and bidirectional screw-driven moving frame, it enables quick disassembly and assembly in a sealed environment, ensuring gas purity while avoiding production interruption. This component transforms traditional depressurization waste into a closed-loop cold source, simultaneously solving the problems of gas loss and temperature rise control. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of the present utility model; Figure 2 This is a perspective view of the pressure tank of this utility model; Figure 3 This is a perspective view of the rotating frame of this utility model; Figure 4 This is a perspective view of the toothed ring of this utility model.

[0017] In the diagram: 1. Protective shell; 2. Inner shell; 3. Pressure tank; 4. Circulation pipe; 5. Rotating frame; 6. Moving frame; 7. Quick connector; 8. Return spring; 9. Quick-connect filter element; 10. Buffer tank; 11. Slide rail; 12. Moving motor; 13. Moving block; 14. Drive rod; 15. Magnetic block; 16. Gear ring; 17. Adjusting motor; 18. Drive gear; 101. Sealing cover; 102. Operating slot. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see Figure 1-4 The technical solution provided in this embodiment is as follows: An apparatus for preparing food-grade carbon dioxide, comprising, The protective shell 1, the inner shell 2, and the pressure tank 3 are provided. The inner shell 2 is embedded in the inner wall of the protective shell 1, and the pressure tank 3 is embedded in the outer wall of the protective shell 1. The circulation assembly is located on the inner wall of the protective shell 1. The circulation assembly includes a circulation pipe 4, a rotating frame 5, a moving frame 6, a quick connector 7, a return spring 8, a quick-connect filter element 9, a buffer tank 10, and a drive assembly. The circulation pipe 4 is embedded in the inner wall of the protective shell 1. The rotating frame 5 is rotatably embedded in the inner wall of the inner shell 2. The moving frame 6 is slidably embedded in the slot of the inner wall of the rotating frame 5. The quick connector 7 is slidably inserted into the openings on the outer walls of both ends of the moving frame 6. The return spring 8 is sleeved on the outer wall of the quick connector 7. The quick connector 7 is connected to the quick-connect filter element 9. The buffer tank 10 is embedded at the bottom of the inner wall of the inner shell 2. The drive assembly is located on the inner wall of the inner shell 2. The cavity of the inner wall of the protective shell 1 is filled with a heat-insulating medium. The buffer tank 10 is connected to the inner wall of the circulation pipe 4 through a valve and a hose. The output end of the circulation pipe 4 is connected to an external carbon dioxide collection device through a hose and a valve.

[0022] In a specific embodiment of this utility model, an external carbon dioxide supply device is connected to the quick connector 7. The quick-connect filter element 9 completes the filtration and drying of carbon dioxide. Subsequently, the carbon dioxide enters the pressure tank 3 through a three-way pipe. After preparation, it awaits packaging and delivery. When the pressure tank 3 experiences a pressure increase due to room temperature rise, the pressure needs to be released, allowing a large amount of carbon dioxide to be delivered through a hose to the interior of the buffer tank 10. By adjusting the motor 17 to drive the drive gear 18 to rotate, the gear ring 16 drives the rotating frame 5 to move, aligning the quick-connect filter element 9 that needs to be replaced with the operating slot 102. At this time, the moving motor 12 is started. The moving block 13 moves towards each other on the inner wall of the slide rail 11, and the magnetic block 15 moves through the drive rod 14 to complete the adsorption of the moving frame 6. The moving motor 12 is started again to push the moving frame 6 away from the rotating frame 5 and into the operating slot 102. At this time, the three-way solenoid valve is opened so that the carbon dioxide remaining in the quick-connect filter element 9 is injected into the buffer tank 10 for continuous recovery. The quick connector 7 is pushed to squeeze the reset spring 8 so that the quick-connect filter element 9 is removed and replaced. The buffer tank 10 extracts carbon dioxide and injects it into the inside of the circulation pipe 4 to reduce the temperature of the internal insulation medium of the protective shell 1 and continuously reduce the temperature of the pressure tank 3.

[0023] Specifically, the drive assembly includes a slide rail 11, a moving motor 12, a moving block 13, a drive rod 14, a magnetic block 15, a gear ring 16, an adjusting motor 17, and a drive gear 18.

[0024] In a specific embodiment of this utility model, the drive component can achieve stable replacement and drive of the quick-connect filter element 9.

[0025] Specifically, the slide rail 11 is fixedly mounted on the inner wall of the inner shell 2 by a bracket, the moving motor 12 is fixedly mounted on the top outer wall of the slide rail 11, the moving block 13 is slidably embedded in the inner wall of the slide rail 11, one end of the drive rod 14 is rotatably inserted into the outer wall of the moving block 13, and the other end of the drive rod 14 is rotatably inserted into the outer wall of the magnetic block 15. The output end of the moving motor 12 is connected to the opening of the inner wall of the moving block 13 by a bidirectional screw thread.

[0026] In a specific embodiment of this utility model, the output end of the moving motor 12 is connected to the opening on the inner wall of the moving block 13 via a bidirectional lead screw thread, which can ensure driving accuracy.

[0027] Specifically, the gear ring 16 is embedded in the inner wall of the rotating frame 5, the adjusting motor 17 is fixedly mounted on the inner wall of the inner shell 2 by a bracket, and the driving gear 18 is fixedly mounted on the outer wall of the output end of the adjusting motor 17. The gear ring 16 and the driving gear 18 are meshed and connected for transmission.

[0028] In a specific embodiment of this utility model, the gear ring 16 and the drive gear 18 are meshed and connected, which can ensure stable transmission.

[0029] Specifically, one end of six quick connectors 7 is connected to an external carbon dioxide supply device via a hose and a valve, one end of the remaining six quick connectors 7 is connected to a pressure tank 3 via a three-way solenoid valve, and one end of the remaining six quick connectors 7 is connected to a buffer tank 10 via a three-way solenoid valve.

[0030] In a specific embodiment of this utility model, one end of the remaining six quick connectors 7 is connected to the buffer tank 10 via a three-way solenoid valve, which can recover carbon dioxide from the quick-connect filter element 9.

[0031] Specifically, the outer wall of the protective shell 1 is provided with an operating groove 102, and a sealing cover 101 is slidably embedded in the inner wall of the operating groove 102.

[0032] In a specific embodiment of this utility model, a sealing cover 101 is slidably embedded in the inner wall of the operating groove 102, which can ensure a stable seal and achieve stable heat preservation.

[0033] Working principle: The external carbon dioxide supply device is connected to the quick connector 7. The carbon dioxide is filtered and dried through the quick-connect filter element 9. Then, the carbon dioxide enters the pressure tank 3 through the three-way pipe. After preparation, it awaits packaging and delivery. When the pressure tank 3 increases due to room temperature rise, the pressure needs to be released, allowing a large amount of carbon dioxide to be delivered to the interior of the buffer tank 10 through the hose. By adjusting the motor 17 to drive the drive gear 18 to rotate, the gear ring 16 drives the rotating frame 5 to move, so that the quick-connect filter element 9 to be replaced is aligned with the operating slot 102. At this time, the moving motor 12 is started, driving the moving block 1 3. Moving towards each other on the inner wall of the slide rail 11, the magnetic block 15 is moved by the drive rod 14 to complete the adsorption of the moving frame 6. The moving motor 12 is started to push the moving frame 6 away from the rotating frame 5 and into the operating slot 102. At this time, the three-way solenoid valve is opened to allow the carbon dioxide remaining in the quick-connect filter element 9 to be injected into the buffer tank 10 for continuous recovery. The quick connector 7 is pushed to squeeze the reset spring 8, so that the quick-connect filter element 9 is removed and replaced. The buffer tank 10 extracts carbon dioxide and injects it into the inside of the circulation pipe 4 to reduce the temperature of the internal insulation medium of the protective shell 1 and continuously reduce the temperature of the pressure tank 3.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An apparatus for preparing food-grade carbon dioxide, characterized in that, include, The protective shell (1), the inner shell (2) and the pressure tank (3) are provided, wherein the inner shell (2) is embedded in the inner wall of the protective shell (1) and the pressure tank (3) is embedded in the outer wall of the protective shell (1); A circulation assembly is located on the inner wall of the protective shell (1), wherein: the circulation assembly includes a circulation pipe (4), a rotating frame (5), a moving frame (6), a quick connector (7), a return spring (8), a quick-connect filter element (9), a buffer tank (10), and a drive assembly. The circulation pipe (4) is embedded in the inner wall of the protective shell (1). The rotating frame (5) is rotatably embedded in the inner wall of the inner shell (2). The moving frame (6) is slidably embedded in the slot of the inner wall of the rotating frame (5). The quick connector (7) is slidably inserted into both ends of the moving frame (6). At the opening of the wall, the reset spring (8) is sleeved on the outer wall of the quick connector (7), the quick connector (7) is connected to the quick-connect filter element (9), the buffer tank (10) is embedded at the bottom of the inner wall of the inner shell (2), the drive assembly is located on the inner wall of the inner shell (2), the cavity of the inner wall of the protective shell (1) is filled with heat-insulating medium, the buffer tank (10) is connected to the inner wall of the circulation pipe (4) through a valve and a hose, and the output end of the circulation pipe (4) is connected to the external carbon dioxide collection device through a hose and a valve.

2. The apparatus for preparing food-grade carbon dioxide according to claim 1, characterized in that, The drive assembly includes a slide rail (11), a moving motor (12), a moving block (13), a drive rod (14), a magnetic block (15), a gear ring (16), an adjusting motor (17), and a drive gear (18).

3. The apparatus for preparing food-grade carbon dioxide according to claim 2, characterized in that, The slide rail (11) is fixedly mounted on the inner wall of the inner shell (2) by a bracket. The moving motor (12) is fixedly mounted on the top outer wall of the slide rail (11). The moving block (13) is slidably embedded in the inner wall of the slide rail (11). One end of the driving rod (14) is rotatably inserted into the outer wall of the moving block (13). The other end of the driving rod (14) is rotatably inserted into the outer wall of the magnetic block (15). The output end of the moving motor (12) is connected to the opening of the inner wall of the moving block (13) by a bidirectional screw thread.

4. The apparatus for preparing food-grade carbon dioxide according to claim 3, characterized in that, The gear ring (16) is embedded in the inner wall of the rotating frame (5), the adjusting motor (17) is fixedly mounted on the inner wall of the inner shell (2) by a bracket, the driving gear (18) is fixedly mounted on the outer wall of the output end of the adjusting motor (17), and the gear ring (16) and the driving gear (18) are meshed and connected.

5. The apparatus for preparing food-grade carbon dioxide according to claim 4, characterized in that, One end of six of the quick connectors (7) is connected to the external carbon dioxide supply device via a hose and a valve. One end of the remaining six quick connectors (7) is connected to the pressure tank (3) via a three-way solenoid valve. One end of the remaining six quick connectors (7) is connected to the buffer tank (10) via a three-way solenoid valve.

6. The apparatus for preparing food-grade carbon dioxide according to claim 5, characterized in that, The outer wall of the protective shell (1) is provided with an operating groove (102), and the inner wall of the operating groove (102) is slidably fitted with a sealing cap (101).

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