Dry ice machine carbon dioxide tail gas recovery device

Abstract

The application provides a dry ice machine carbon dioxide tail gas recovery device, belonging to the technical field of dry ice manufacturing, comprising a tank body, a base and a sealing cover, the base is threadedly connected to the inner wall at the bottom end of the tank body, the sealing cover is fixedly arranged at the top end of the tank body through bolts and a sealing ring, a recovery assembly is arranged at the inner wall of the tank body, wherein the recovery assembly comprises a liquefaction bottle, a heat preservation layer, an expansion pipe, a cooling pipe, a heat dissipation pipe and a liquefaction pipe, and the liquefaction bottle is embedded in the inner center of the tank body. Part of nitrogen is transported into the inside of the cooling pipe to cool the clean water in the expansion pipe to form an ice layer, finally the nitrogen is transported into a nitrogen gas vaporizer and then into a gas filling workshop for re-liquefaction, the heat preservation performance of the tank body is improved throughout the process, the excessive loss of liquid nitrogen is avoided, the production cost is prevented from being increased, the economic benefit is maximized, the dry ice machine is prevented from releasing tail gas into the air, and the environmental protection and economy are improved.

Description

Technical Field

[0001] This invention belongs to the field of dry ice manufacturing technology, and specifically relates to a carbon dioxide exhaust gas recovery device for dry ice machines. Background Technology

[0002] Dry ice is a solid form of carbon dioxide. It is produced by liquefying carbon dioxide into a colorless liquid at a pressure of 6250.5498 kPa and then rapidly solidifying it under low pressure. Dry ice is now widely used in many fields.

[0003] In the process of dry ice manufacturing, because liquid carbon dioxide is used to produce dry ice, 200 kg of liquid carbon dioxide can only be compressed into 100 kg of dry ice. The remaining gas will be emitted as waste gas during the dry ice compression process, resulting in a 50% waste of raw materials and the generation of a large amount of carbon dioxide tail gas. Existing carbon dioxide capture technology is often inefficient and difficult to treat efficiently, leading to leakage of some tail gas, which can easily cause safety accidents and cause economic costs to rise sharply. Summary of the Invention

[0004] The purpose of this invention is to provide a carbon dioxide exhaust gas recovery device for dry ice machines, which aims to solve the problems mentioned in the background art.

[0005] A dry ice machine carbon dioxide exhaust gas recovery device includes,

[0006] The tank body, the base, and the sealing cap are provided. The base is threaded to the inner wall of the bottom end of the tank body, and the sealing cap is fixed to the top end of the tank body by bolts and a sealing ring.

[0007] A recycling assembly is located on the inner wall of the tank. The recycling assembly includes a liquefaction bottle, an insulation layer, an expansion tube, a cooling tube, a heat dissipation tube, and a liquefaction tube. The liquefaction bottle is embedded in the center of the tank. The insulation layer is embedded in the inner wall of the tank. The expansion tube is sleeved on the outer wall of the liquefaction bottle. The cooling tube is embedded in the inner wall of the expansion tube. The heat dissipation tube is embedded in the center of the inner wall of the liquefaction bottle. The liquefaction tube and the liquefaction bottle are interconnected. A liquefaction tank is fixedly installed on the bottom of the outer wall of the base.

[0008] Furthermore, the outer wall of the heat dissipation pipe is fitted with fins, and the outer wall of the fins is provided with heat exchange holes.

[0009] Furthermore, both sides of the inner wall of the tank are embedded with conveying pipes, and the inner wall of the conveying pipes is embedded with circulation pipes, and the two circulation pipes are respectively connected to the two ends of the heat dissipation pipes.

[0010] Furthermore, the outer wall of the base is fitted with the center of the inner wall of the mounting plate.

[0011] Furthermore, clamping frames are embedded on both sides of the inner wall of the tank, and one end of the clamping frame is fitted onto the outer wall of the liquefied bottle.

[0012] Furthermore, the two ends of the cooling pipe are connected to the two ends of the circulation pipe through one-way valves and pipes.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] In this scheme, after sufficient cooling and utilization, a portion of the nitrogen is transported to the interior of the cooling pipe to cool the clean water inside the expansion pipe, forming an ice layer to cool the liquefied bottle. Finally, the nitrogen is transported to the nitrogen vaporizer and then to the gas filling workshop for re-liquefaction and later use. This process improves the insulation performance of the tank while avoiding excessive loss of liquid nitrogen, which would increase production costs and maximize economic benefits. It also avoids the release of exhaust gas from the dry ice machine into the air, thus improving both environmental protection and economic efficiency. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a schematic diagram of the heat exchange holes of the present invention;

[0018] Figure 3 This is a partial half-sectional perspective view of the liquefaction tube of the present invention.

[0019] In the diagram: 1. Tank body; 2. Base; 3. Sealing cap; 4. Delivery pipe; 5. Mounting plate; 6. Clamping frame; 7. Liquefaction bottle; 8. Insulation layer; 9. Expansion pipe; 10. Cooling pipe; 11. Heat dissipation pipe; 12. Fins; 13. Heat exchange hole; 14. Liquefaction pipe; 15. Circulation pipe; 101. Liquefaction tank. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, 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 invention based on the specific circumstances.

[0023] Please see Figure 1-3 The technical solution provided in this embodiment is as follows:

[0024] A dry ice machine carbon dioxide exhaust gas recovery device includes,

[0025] Tank body 1, base 2 and sealing cover 3, the base 2 is threaded to the inner wall of the bottom end of the tank body 1, and the sealing cover 3 is fixed to the top end of the tank body 1 by bolts and sealing rings;

[0026] The recycling assembly is located on the inner wall of the tank 1. The recycling assembly includes a liquefaction bottle 7, an insulation layer 8, an expansion tube 9, a cooling tube 10, a heat dissipation tube 11, and a liquefaction tube 14. The liquefaction bottle 7 is embedded in the center of the tank 1. The insulation layer 8 is embedded in the inner wall of the tank 1. The expansion tube 9 is sleeved on the outer wall of the liquefaction bottle 7. The cooling tube 10 is embedded in the inner wall of the expansion tube 9. The heat dissipation tube 11 is embedded in the center of the inner wall of the liquefaction bottle 7. The liquefaction tube 14 is connected to the liquefaction bottle 7. A liquefaction tank 101 is fixedly installed on the bottom of the outer wall of the base 2.

[0027] In a specific embodiment of the present invention, liquid nitrogen produced in the gas filling workshop is first stored in an external liquid nitrogen storage tank. The liquid nitrogen is then transported to the interior of the circulation pipe 15 via a booster pump and pipeline. The liquid nitrogen is then used to cool the interior of the liquefaction bottle 7 through the heat dissipation pipe 11, fins 12, and heat exchange holes 13, reducing the temperature to -60°C to -80°C. The carbon dioxide exhaust gas generated by the dry ice machine is buffered. Subsequently, the carbon dioxide is transported to a liquefaction pipe 14 at the top via a gas compressor. After heat exchange, the carbon dioxide forms liquid carbon dioxide, which is then connected to the liquefaction tank 101 via the bottom liquefaction pipe 14. The liquefaction tank 101 delivers liquid carbon dioxide to an external storage device. Subsequently, liquid nitrogen passes through multiple heat dissipation pipes 11, and after being fully cooled and utilized, a portion of the nitrogen is delivered to the interior of the cooling pipe 10 to cool the clean water inside the expansion pipe 9, forming an ice layer to cool the liquefaction bottle 7. Finally, the nitrogen is delivered to the nitrogen vaporizer and then to the gas filling workshop for re-liquefaction and use. The entire process improves the insulation performance of the tank 1 while avoiding excessive loss of liquid nitrogen, which would increase production costs and maximize economic benefits. It also avoids the release of exhaust gas from the dry ice machine into the air, thus improving environmental protection and economy.

[0028] Specifically, the outer wall of the heat dissipation pipe 11 is fitted with fins 12, and the outer wall of the fins 12 is provided with heat exchange holes 13.

[0029] In a specific embodiment of the present invention, heat exchange efficiency can be ensured through the fins 12 and the heat exchange holes 13.

[0030] Specifically, both sides of the inner wall of the tank 1 are fitted with conveying pipes 4, and the inner wall of the conveying pipes 4 is fitted with circulation pipes 15. The two circulation pipes 15 are connected to the two ends of the heat dissipation pipe 11 respectively.

[0031] In a specific embodiment of the present invention, the delivery pipe 4 can be used to protect the joint of the circulation pipe 15 and prevent leakage.

[0032] Specifically, the outer wall of the base 2 is fitted with the center of the inner wall of the mounting plate 5.

[0033] In a specific embodiment of the present invention, the stability of the skid mounting can be ensured by fitting the mounting plate 5 at the center of the inner wall of the outer wall of the base 2.

[0034] Specifically, clamping frames 6 are embedded on both sides of the inner wall of the tank 1, and one end of the clamping frame 6 is fitted onto the outer wall of the liquefied bottle 7.

[0035] In a specific embodiment of the present invention, the clamping frame 6 can ensure that the liquefied bottle 7 is clamped and suspended in the air.

[0036] Specifically, the two ends of the cooling pipe 10 are connected to the two ends of the circulation pipe 15 through one-way valves and pipes.

[0037] In a specific embodiment of the present invention, the two ends of the cooling pipe 10 are connected to the two ends of the circulation pipe 15 through one-way valves and pipes, which can ensure the reuse of nitrogen.

[0038] The working process of the carbon dioxide exhaust gas recovery device for a dry ice machine provided by this invention is as follows:

[0039] First, the liquid nitrogen produced in the gas filling workshop is stored in an external liquid nitrogen storage tank. The liquid nitrogen is then transported to the inside of the circulation pipe 15 via a booster pump and pipelines. The liquid nitrogen is then used to cool the inside of the liquefaction bottle 7 through the heat dissipation pipe 11, fins 12, and heat exchange holes 13. The carbon dioxide exhaust gas generated by the dry ice machine is buffered. Subsequently, the carbon dioxide is transported to a liquefaction pipe 14 at the top via a gas compressor. After heat exchange, the carbon dioxide becomes liquid carbon dioxide and is transported by the bottom liquefaction pipe 14 to the liquid carbon dioxide storage pipe. Liquid nitrogen, after being fully cooled and utilized through multiple heat dissipation pipes 11, is partially transported to the interior of cooling pipe 10 to cool the clean water inside expansion pipe 9, forming an ice layer to cool liquefaction bottle 7. Finally, the nitrogen is transported to nitrogen vaporizer and then to the gas filling workshop for re-liquefaction and later use. This process improves the insulation performance of tank 1 while avoiding excessive loss of liquid nitrogen, which would increase production costs and maximize economic benefits. It also prevents the dry ice machine from releasing exhaust gas into the air, thus improving both environmental friendliness and economic efficiency.

[0040] Finally, it should be noted that the above descriptions are merely 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 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A dry ice machine carbon dioxide tail gas recovery apparatus, characterized by, The utility model relates to a kind of liquid nitrogen tank, including, Tank body (1), base (2) and sealing cover (3), the base (2) is threadedly connected in the bottom end inner wall of tank body (1), the sealing cover (3) is fixedly arranged at the top end of tank body (1) by bolt and sealing ring; Recycling assembly is located at the inner wall of tank body (1), wherein: the recycling assembly includes liquefied bottle (7), heat preservation layer (8), expansion pipe (9), cooling pipe (10), heat dissipation pipe (11) and liquefaction pipe (14), the liquefied bottle (7) is embedded in the inner center of tank body (1), the heat preservation layer (8) is embedded in the inner wall of tank body (1), the expansion pipe (9) is sleeved on the outer wall of liquefied bottle (7), and the expansion pipe (9) is filled with clean water, the cooling pipe (10) is embedded in the inner wall of expansion pipe (9), the heat dissipation pipe (11) is embedded in the inner wall center of liquefied bottle (7), the liquefaction pipe (14) is arranged in communication with the liquefied bottle (7), and the outer wall bottom of base (2) is fixedly provided with liquefaction box (101).

2. The dry ice machine carbon dioxide tail gas recovery unit of claim 1, wherein, The outer wall of the heat dissipation pipe (11) is sleeved with fin (12), and the outer wall of fin (12) is provided with heat exchange hole (13).

3. The dry ice machine carbon dioxide exhaust gas recovery apparatus according to claim 2, wherein The inner wall of the tank body (1) is embedded with conveying pipe (4) on both sides, the inner wall of the conveying pipe (4) is embedded with circulation pipe (15), and the two ends of the two circulation pipes (15) are arranged in communication with the two ends of the heat dissipation pipe (11) respectively.

4. The dry ice machine carbon dioxide exhaust gas recovery apparatus according to claim 3, wherein The inner wall center of the mounting plate (5) is sleeved on the outer wall of the base (2).

5. The dry ice machine carbon dioxide exhaust gas recovery apparatus according to claim 4, wherein The inner wall of the tank body (1) is embedded with clamping frame (6) on both sides, and one end of the clamping frame (6) is sleeved on the outer wall of the liquefied bottle (7).

6. The dry ice machine carbon dioxide exhaust gas recovery apparatus according to claim 5, wherein The two ends of the cooling pipe (10) are communicated with the two ends of the circulation pipe (15) through one-way valve and pipeline.

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