Dry ice machine gaseous CO2 tail gas recovery device

Abstract

The utility model relates to the technical field of CO2 recovery, in particular to a gaseous CO2 tail gas recovery device of a dry ice machine, which comprises a first tank body, a second tank body and a storage tank, the circumferential surface of the left side of the first tank body is fixedly connected with a first connecting pipe, and the top end of the first tank body is fixedly connected with a second connecting pipe; a third connecting pipe and a valve are fixedly connected to the circumferential surface of the front side of the second tank body, the end, away from the second tank body, of the third connecting pipe is fixedly installed at the upper end of the storage tank, a sealing cover is installed at the upper end of the second tank body, a pressing mechanism is installed on the circumferential surface of the second tank body, and a first fixing plate is fixedly connected to the interior of the second tank body; air holes are formed in the upper end face of the first fixing plate, a net cylinder is fixedly connected to the upper end of the first fixing plate, and a filtering assembly is installed in the net cylinder. According to the utility model, the absorbed carbon dioxide gas can be filtered, so that the finally stored carbon dioxide tail gas is less in impurity content and higher in purity.

Description

Technical Field

[0001] The utility model relates to the technical field of CO2 recovery, in particular to a device for recovering gaseous CO2 tail gas from a dry ice machine. Background Art

[0002] A dry ice machine is a machine that produces dry ice. It can remove dirt from objects by spraying extremely low-temperature particles onto the object. The dirt on the surface of the object will then be rapidly frozen to brittleness and burst due to contact with the extremely low-temperature particles, thereby achieving the purpose of dirt removal. The dry ice machine will produce some gaseous carbon dioxide in the process of producing dry ice. In order to achieve the purpose of energy conservation and environmental protection, the carbon dioxide exhaust gas needs to be recycled and reused.

[0003] At present, when the carbon dioxide exhaust gas discharged from the dry ice machine is recovered, it is directly absorbed and stored. Since the exhaust gas discharged from the dry ice machine contains not only carbon dioxide gas, but also other impurities and particulate matter, direct storage will result in a large amount of impurities in the carbon dioxide gas. In order to improve the purity of the recovered carbon dioxide exhaust gas, it is necessary to design a dry ice machine gaseous CO2 exhaust recovery device. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a dry ice machine gaseous CO2 tail gas recovery device.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a dry ice machine gaseous CO2 tail gas recovery device, comprising a first tank body, a second tank body and a storage tank, the circumferential surface on the left side of the first tank body is fixedly connected to a first connecting pipe, and the first connecting pipe is used to connect to the air outlet pipe of the dry ice machine, the top of the first tank body is fixedly connected to a second connecting pipe, the circumferential surface on the left side of the second tank body is fixedly connected to an air pump, the exhaust end of the air pump extends into the second tank body and is communicated with the second tank body, and the air inlet end of the air pump is fixedly connected to the second connecting pipe , a third connecting pipe and a valve are fixedly connected to the circumferential surface of the front side of the second tank body, and the valve is fixedly connected to the third connecting pipe, one end of the third connecting pipe away from the second tank body is fixedly installed on the upper end of the storage tank, a sealing cover is installed on the upper end of the second tank body, a pressing mechanism is installed on the circumferential surface of the second tank body, and the pressing mechanism is used to press the sealing cover, a first fixing plate is fixedly connected to the interior of the second tank body, an air vent is opened on the upper end surface of the first fixing plate, a mesh cylinder is fixedly connected to the upper end of the first fixing plate, and a filter assembly is installed inside the mesh cylinder;

[0006] The filter assembly includes a second fixed plate, a threaded cylinder, a first filter mesh cylinder, a second filter mesh cylinder and an activated carbon adsorption cylinder. The second fixed plate is tightly pressed on the upper end of the mesh cylinder. The upper end of the second fixed plate is fixedly connected to the threaded cylinder. The threaded cylinder and the second fixed plate are an integrated structure. The sealing cover extends downward into the second tank body, and the circumferential surface of the sealing cover is provided with an external thread that cooperates with the threaded cylinder. The threaded cylinder is threadedly connected to the sealing cover through the external thread. The bottom end of the second fixed plate is fixedly connected with the second filter mesh cylinder, the first filter mesh cylinder and the activated carbon adsorption cylinder in sequence from the inside to the outside, and the second filter mesh cylinder, the first filter mesh cylinder and the activated carbon adsorption cylinder are all located in the mesh cylinder and tightly pressed on the upper end of the first fixed plate.

[0007] Furthermore, the mesh size of the second filter screen cartridge is larger than the mesh size of the first filter screen cartridge, and the inner diameter of the second filter screen cartridge is larger than the diameter of the air pores.

[0008] Furthermore, sealing grooves are provided in the interior and circumferential surface of the sealing cover, and sealing rings are fixedly connected to the interiors of the two sealing grooves, and the sealing rings are tightly fitted to the second tank body.

[0009] Furthermore, the clamping mechanism includes an electric telescopic rod, a support plate, a pressure plate, a fixed shaft and a circular hole. The circumferential surface of the second tank body is fixedly connected to two fixed seats distributed on the left and right. The top ends of the two fixed seats are fixedly connected to the electric telescopic rod. The output ends of the two electric telescopic rods are fixedly connected to the support plate. The upper ends of the two support plates are rotatably connected to the pressure plate. A circular hole is provided on the upper end surface of the pressure plate. The upper end of the sealing cover is fixedly connected to the fixed shaft, and the fixed shaft is connected to the pressure plate through the circular hole.

[0010] Furthermore, the upper ends of the two fixing seats are fixedly connected to positioning rods, and the positioning rods are located at the front end of the pressing plate and in contact with the pressing plate.

[0011] Furthermore, the upper end surface of the sealing cover is provided with two positioning holes distributed front to back, the top end of the second tank body is fixedly connected with two positioning shafts distributed front to back, and the positioning shafts are connected to the sealing cover through the positioning holes.

[0012] The utility model has the following beneficial effects:

[0013] 1. Compared with the existing technology, this dry ice machine gaseous CO2 tail gas recovery device can filter the absorbed carbon dioxide gas during the absorption process and before storing the carbon dioxide tail gas under the action of the filtering component, so that the impurities, particulate matter and even odor inside it are filtered out, so that the carbon dioxide tail gas finally stored contains less impurities and has higher purity.

[0014] 2. Compared with the existing technology, this dry ice machine gaseous CO2 exhaust recovery device, through the mutual cooperation of the first tank body, the second tank body and the valve, needs to pass through two tank bodies before the carbon dioxide exhaust is collected in the storage tank, thereby buffering the collection of the gas and preventing it from rushing into the storage tank all at once, which would affect the life of the storage tank. In addition, when the storage tank is full and needs to be replaced, the first tank body and the second tank body can temporarily store the carbon dioxide exhaust, which buys time for the replacement of the storage tank. There is no need to immediately stop the recovery of the carbon dioxide exhaust when replacing the storage tank, which is more convenient to use.

[0015] 3. Compared with the prior art, the dry ice machine gaseous CO2 tail gas recovery device facilitates the compression of the sealing cover under the action of the compression mechanism, so that it is firmly installed on the top of the second tank body. At the same time, when the compression mechanism no longer compresses the sealing cover, the sealing cover can be removed from the second tank body, thereby facilitating the subsequent removal and replacement of the filter assembly. Since the installation and removal of the sealing cover are relatively simple and convenient, it brings convenience to the subsequent removal and replacement of the filter assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a dry ice machine gaseous CO2 tail gas recovery device proposed in the utility model from the left side;

[0017] Figure 2 This is a schematic diagram of the overall structure of a right-side view of a dry ice machine gaseous CO2 tail gas recovery device proposed in the utility model;

[0018] Figure 3 This utility model proposes a dry ice machine gaseous CO2 tail gas recovery device Figure 2 Schematic diagram of the enlarged structure of A;

[0019] Figure 4 This is a schematic diagram of the structure of a dry ice machine gaseous CO2 tail gas recovery device proposed in the utility model after a partial cross-section view;

[0020] Figure 5 This utility model proposes a dry ice machine gaseous CO2 tail gas recovery device Figure 4 Schematic diagram of the enlarged structure of B;

[0021] Figure 6 This utility model proposes a dry ice machine gaseous CO2 tail gas recovery device Figure 4 Schematic diagram of the enlarged structure of C in the middle.

[0022] Legend:

[0023] 1. First tank body; 2. First connecting pipe; 3. Second connecting pipe; 4. Vacuum pump; 5. Second tank body; 6. Storage tank; 7. Third connecting pipe; 8. Valve; 9. Positioning shaft; 10. Sealing cover; 11. Electric telescopic rod; 12. Positioning hole; 13. Fixed seat; 14. Support plate; 15. Threaded cylinder; 16. Pressing plate; 17. Positioning rod; 18. Fixed shaft; 19. Circular hole; 20. Sealing ring; 21. First fixing plate; 22. Second fixing plate; 23. Mesh cylinder; 24. Air vent; 25. Activated carbon adsorption cylinder; 26. First filter cylinder; 27. Second filter cylinder. DETAILED DESCRIPTION

[0024] Reference Figure 1-6 The utility model provides a dry ice machine gaseous CO2 tail gas recovery device, including a first tank body 1, a second tank body 5 and a storage tank 6. The circumferential surface on the left side of the first tank body 1 is fixedly connected to a first connecting pipe 2, and the first connecting pipe 2 is used to connect the air outlet pipe of the dry ice machine. The top of the first tank body 1 is fixedly connected to a second connecting pipe 3. The circumferential surface on the left side of the second tank body 5 is fixedly connected to an air pump 4. The exhaust end of the air pump 4 extends into the second tank body 5 and is communicated with the second tank body 5. The air inlet end of the air pump 4 is fixedly connected to the second connecting pipe 3. The circumferential surface on the front side of the second tank body 5 is fixedly connected to the second connecting pipe 3. The circumferential surface is fixedly connected with a third connecting pipe 7 and a valve 8, and the valve 8 is fixedly connected to the third connecting pipe 7. One end of the third connecting pipe 7 away from the second tank body 5 is fixedly installed on the upper end of the storage tank 6. A sealing cover 10 is installed on the upper end of the second tank body 5. A pressing mechanism is installed on the circumferential surface of the second tank body 5, and the pressing mechanism is used to press the sealing cover 10. A first fixing plate 21 is fixedly connected to the interior of the second tank body 5. An air vent 24 is opened on the upper end surface of the first fixing plate 21. A mesh cylinder 23 is fixedly connected to the upper end of the first fixing plate 21, and a filter assembly is installed inside the mesh cylinder 23.

[0025] The filter assembly includes a second fixed plate 22, a threaded cylinder 15, a first filter screen cylinder 26, a second filter screen cylinder 27 and an activated carbon adsorption cylinder 25. The second fixed plate 22 is pressed against the upper end of the screen cylinder 23. The upper end of the second fixed plate 22 is fixedly connected to the threaded cylinder 15. The threaded cylinder 15 and the second fixed plate 22 are an integrated structure. The sealing cover 10 extends downward into the second tank body 5, and the circumferential surface of the sealing cover 10 is provided with an external thread that cooperates with the threaded cylinder 15. The threaded cylinder 15 is connected to the second tank body 5 by the external thread. Threadedly connected to the sealing cover 10, the bottom end of the second fixed plate 22 is fixedly connected with the second filter mesh cylinder 27, the first filter mesh cylinder 26 and the activated carbon adsorption cylinder 25 in sequence from the inside to the outside, and the second filter mesh cylinder 27, the first filter mesh cylinder 26 and the activated carbon adsorption cylinder 25 are all located in the mesh cylinder 23 and tightly pressed against the upper end of the first fixed plate 21; the mesh size of the second filter mesh cylinder 27 is larger than the mesh size of the first filter mesh cylinder 26, and the inner diameter of the second filter mesh cylinder 27 is larger than the diameter of the air vent 24. During operation, the first connecting pipe 2 is connected to the exhaust pipe of the dry ice machine, and the carbon dioxide exhaust gas discharged from the dry ice machine enters the first tank body 1 along the first connecting pipe 2, and then enters the second tank body 5 along the second connecting pipe 3. At this time, the carbon dioxide exhaust gas will enter the filter assembly along the air vent 24, and then pass through the second filter mesh cylinder 27, the first filter mesh cylinder 26 and the activated carbon adsorption cylinder 25 in the filter assembly in turn. The second filter mesh cylinder 27 and the first filter mesh cylinder 26 respectively filter the impurities and particulate matter in the carbon dioxide exhaust gas twice, and then are adsorbed by the activated carbon adsorption cylinder 25. The odor contained therein can also be absorbed. The filtered carbon dioxide exhaust gas finally floats out through the mesh cylinder 23, and then enters the storage tank 6 along the third connecting pipe 7 for storage. In this way, the carbon dioxide exhaust gas finally stored contains less impurities and has higher purity.

[0026] Furthermore, sealing grooves are formed on both the interior and circumferential surface of the sealing cover 10. Sealing rings 20 are fixedly connected to the interiors of both sealing grooves, and the sealing rings 20 fit tightly against the second tank body 5. During operation, the cooperation of the sealing rings 20 enhances the sealing effect between the sealing cover 10 and the second tank body 5. Carbon dioxide exhaust gas that enters the second tank body 5 can be discharged centrally through the third connecting pipe 7, and is less likely to leak from the connection between the sealing cover 10 and the second tank body 5.

[0027] Furthermore, the clamping mechanism includes an electric telescopic rod 11, a support plate 14, a pressure plate 16, a fixed shaft 18 and a circular hole 19. The circumferential surface of the second tank body 5 is fixedly connected to two fixed seats 13 distributed on the left and right. The top ends of the two fixed seats 13 are fixedly connected to the electric telescopic rod 11, and the output ends of the two electric telescopic rods 11 are fixedly connected to the support plate 14. The upper ends of the two support plates 14 are rotatably connected to the pressure plate 16. The upper end surface of the pressure plate 16 is provided with a circular hole 19. The upper end of the sealing cover 10 is fixedly connected to the fixed shaft 18, and the fixed shaft 18 is connected to the pressure plate 16 through the circular hole 19. During operation, the electric telescopic rod 11 drives the support plate 14 to move upward, and then drives the pressure plate 16 and the circular hole 19 to move upward until the pressure plate 16 is disengaged from the fixed shaft 18. The operator manually rotates the pressure plate 16 so that it is in a staggered state with the sealing cover 10, and then the sealing cover 10 can be directly taken out from the second tank body 5, and at the same time drives the filter assembly to be detached from the second tank body 5. Since the filter assembly is threadedly connected to the sealing cover 10, it is convenient to remove the removed filter assembly from the lower end of the sealing cover 10 for replacement.

[0028] Furthermore, the upper ends of the two fixing seats 13 are fixedly connected to positioning rods 17, and the positioning rods 17 are located at the front end of the pressure plate 16 and in contact with the pressure plate 16. During operation, the presence of the positioning rods 17 can position the position of the pressure plate 16 so that the pressure plate 16 and the circular hole 19 can be more accurately located at the upper end of the fixed shaft 18.

[0029] Furthermore, the upper end surface of the sealing cover 10 is provided with two positioning holes 12 distributed front to back. The top end of the second tank body 5 is fixedly connected to two positioning shafts 9 distributed front to back. The positioning shafts 9 are connected to the sealing cover 10 through the positioning holes 12. During operation, the positioning shafts 9 cooperate with the positioning holes 12 to accurately locate the installation position of the sealing cover 10. When the sealing cover 10 is installed on the upper end of the second tank body 5, it also drives the fixing shaft 18 to accurately locate the appropriate position at the lower end of the pressure plate 16, so that the sealing cover 10 can be subsequently compressed by using the pressure plate 16 and the circular holes 19 in conjunction with the fixing shafts 18.

[0030] Working principle:

[0031] During use, the first connecting pipe 2 is connected to the exhaust pipe of the dry ice machine, and then the vacuum pump 4 is controlled to operate, and the valve 8 is opened at the same time. At this time, the carbon dioxide exhaust gas discharged from the dry ice machine will enter the first tank body 1 along the first connecting pipe 2, and then enter the second tank body 5 along the second connecting pipe 3. At this time, the carbon dioxide exhaust gas will enter the filter component along the air vent 24, and the filter component will filter the impurities and particulate matter in the carbon dioxide exhaust gas. The filtered carbon dioxide exhaust gas will eventually float out through the mesh tube 23 and enter the storage tank 6 along the third connecting pipe 7 for storage. In this way, the carbon dioxide exhaust gas finally stored has less impurities and higher purity.

[0032] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dry ice machine gaseous CO2 tail gas recovery device, comprising a first tank body (1), a second tank body (5) and a storage tank (6), characterized in that: The circumferential surface on the left side of the first tank body (1) is fixedly connected to a first connecting pipe (2), and the first connecting pipe (2) is used for connecting to an air outlet pipe of an external dry ice machine. The top of the first tank body (1) is fixedly connected to a second connecting pipe (3). The circumferential surface on the left side of the second tank body (5) is fixedly connected to an air pump (4). The exhaust end of the air pump (4) extends into the second tank body (5) and is communicated with the second tank body (5). The air inlet end of the air pump (4) is fixedly connected to the second connecting pipe (3). The circumferential surface on the front side of the second tank body (5) is fixedly connected to a third connecting pipe (7) and a valve (8), and the valve (8) is connected to the third connecting pipe (7). The third connecting pipe (7) is fixedly connected, and one end of the third connecting pipe (7) away from the second tank body (5) is fixedly installed on the upper end of the storage tank (6); the upper end of the second tank body (5) is installed with a sealing cover (10); the circumferential surface of the second tank body (5) is installed with a pressing mechanism, and the pressing mechanism is used to press the sealing cover (10); the interior of the second tank body (5) is fixedly connected with a first fixing plate (21); the upper end surface of the first fixing plate (21) is provided with an air vent (24); the upper end of the first fixing plate (21) is fixedly connected with a mesh cylinder (23), and the interior of the mesh cylinder (23) is installed with a filter assembly; The filter assembly comprises a second fixed plate (22), a threaded cylinder (15), a first filter screen cylinder (26), a second filter screen cylinder (27) and an activated carbon adsorption cylinder (25); the second fixed plate (22) is pressed tightly against the upper end of the screen cylinder (23); the upper end of the second fixed plate (22) is fixedly connected to the threaded cylinder (15); the threaded cylinder (15) and the second fixed plate (22) are an integrated structure; the sealing cover (10) extends downward into the second tank body (5), and the sealing cover (10) The circumferential surface of the second fixing plate (22) is provided with an external thread that matches the threaded cylinder (15), and the threaded cylinder (15) is threadedly connected to the sealing cover (10) through the external thread. The bottom end of the second fixing plate (22) is fixedly connected with the second filter screen cylinder (27), the first filter screen cylinder (26) and the activated carbon adsorption cylinder (25) in sequence from the inside to the outside, and the second filter screen cylinder (27), the first filter screen cylinder (26) and the activated carbon adsorption cylinder (25) are all located in the screen cylinder (23) and are tightly pressed against the upper end of the first fixing plate (21).

2. The dry ice machine gaseous CO2 tail gas recovery device according to claim 1, characterized in that: The mesh size of the second filter screen cartridge (27) is larger than the mesh size of the first filter screen cartridge (26), and the inner diameter of the second filter screen cartridge (27) is larger than the diameter of the air vent (24).

3. The dry ice machine gaseous CO2 tail gas recovery device according to claim 1, characterized in that: The sealing cover (10) is provided with sealing grooves on its interior and circumferential surface. The interiors of the two sealing grooves are fixedly connected with sealing rings (20), and the sealing rings (20) are tightly fitted to the second tank body (5).

4. The dry ice machine gaseous CO2 tail gas recovery device according to claim 1, characterized in that: The clamping mechanism comprises an electric telescopic rod (11), a support plate (14), a pressure plate (16), a fixed shaft (18) and a circular hole (19); the circumferential surface of the second tank body (5) is fixedly connected to two fixed seats (13) distributed on the left and right; the top ends of the two fixed seats (13) are fixedly connected to the electric telescopic rod (11); the output ends of the two electric telescopic rods (11) are fixedly connected to the support plate (14); the upper ends of the two support plates (14) are rotatably connected to the pressure plate (16); the upper end surface of the pressure plate (16) is provided with a circular hole (19); the upper end of the sealing cover (10) is fixedly connected to the fixed shaft (18); and the fixed shaft (18) is connected to the pressure plate (16) through the circular hole (19).

5. The dry ice machine gaseous CO2 tail gas recovery device according to claim 4, characterized in that: The upper ends of the two fixing seats (13) are fixedly connected with positioning rods (17), and the positioning rods (17) are located at the front end of the pressing plate (16) and are in contact with the pressing plate (16).

6. The dry ice machine gaseous CO2 tail gas recovery device according to claim 1, characterized in that: The upper end surface of the sealing cover (10) is provided with two positioning holes (12) distributed front and back, and the top end of the second tank body (5) is fixedly connected to two positioning shafts (9) distributed front and back, and the positioning shafts (9) are connected to the sealing cover (10) through the positioning holes (12).

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