Coaxial sleeve counter-flow oxygen generation system heat exchanger

Abstract

This utility model provides a coaxial tube counter-current oxygen generation system heat exchange device, comprising: a first coaxial tube, inside which is a second coaxial tube, and an outer casing tube wrapped around the first coaxial tube, which is composed of two sets of semi-casing tubes. Connecting components are fitted on both sides of the semi-casing tubes, and recovery components are fitted on both the inner and outer walls of the first coaxial tube; and an insulation box, which is placed on one side of the first coaxial tube. This utility model enhances heat exchange through counter-current heat exchange and spiral coils: the spiral coils enhance turbulent heat exchange; and the combined operation of double-layer spiral recovery effectively improves the overall heat exchange effect compared to straight-tube heat exchangers. Assembled by two semi-casing tubes connected by quick-release components with rubber gaskets, maintenance does not require disassembly of the main pipeline, and the bolted connection structure shortens assembly and disassembly time.

Description

Technical Field

[0001] This utility model relates to the field of oxygen generation system technology, specifically to a heat exchange device for a coaxial tube counter-flow oxygen generation system. Background Technology

[0002] In the fields of industrial oxygen production and medical oxygen supply, the oxygen production system is the core equipment for producing high-purity oxygen, and its energy efficiency directly affects the cost of oxygen production. The mainstream oxygen production system consists of an air compressor, an air buffer tank, a refrigerated dryer, a desiccant dryer, an oxygen generator, and an oxygen buffer tank connected in series. The process is as follows: the air compressor compresses air, the buffer tank stabilizes the pressure, and then the air is sent to the refrigerated dryer for preliminary dehydration, followed by deep drying by the desiccant dryer, and finally the oxygen generator separates the oxygen and stores it in the buffer tank.

[0003] Refrigerated dryers are key equipment for air pretreatment. They remove water through low-temperature liquefaction. They are equipped with air inlet and outlet pipes: ambient temperature compressed air enters through the inlet pipe, cools down to below the dew point and condensation is discharged, and dry low-temperature air is sent to the desiccant dryer through the outlet pipe.

[0004] However, the existing system has the following problem: the outer wall of the air outlet pipe of the freeze dryer remains at a low temperature due to the low temperature of the air inside the pipe, resulting in intense heat exchange with the ambient temperature air. This causes the air inside the pipe to heat up, leading to a significant loss of low-temperature energy and wasted energy. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a heat exchange device for a coaxial sleeve counter-current oxygen generation system, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A coaxial tube counter-current oxygen generation system heat exchange device, a freeze dryer body, wherein coaxial tube one and coaxial tube two are respectively connected and installed at the output and input ends of the freeze dryer body, and coaxial tube one and coaxial tube two are wrapped with an outer tube, and the outer tube is composed of two sets of semi-encased tubes. Connecting components are installed on both sides of the semi-encased tubes. The inner and outer walls of coaxial tube one are equipped with recovery components; an insulation box is placed on one side of coaxial tube one; the recovery components include an upper recovery tube and a lower recovery tube, and the upper recovery tube and lower recovery tube are respectively installed around the inner and outer walls of coaxial tube one.

[0008] Furthermore, a base is fixedly installed at the bottom of the insulated box, and a supply component is assembled on the top of the base. The supply component is installed and connected to the insulated box and the upper recycling pipe respectively.

[0009] Furthermore, the supply assembly includes an infusion pump, a delivery pipe, and an output pipe. The infusion pump is fixedly installed on the top of the base. The delivery pipe is connected to the output end of the infusion pump and is installed in connection with the upper recovery pipe. The output pipe is connected to the outer casing of the coaxial tube and is installed in connection with the lower recovery pipe.

[0010] Furthermore, the recycling assembly also includes an adapter and a connector. The lower recycling pipe and the upper recycling pipe are connected at the same end to each other. The other ends of the upper recycling pipe and the lower recycling pipe are equipped with connectors that are connected to the conveying pipe and the output pipe. The other end of the lower recycling pipe is connected to the output pipe.

[0011] Furthermore, the connecting component includes fastening screws, rubber pads, and connecting plates. Connecting plates are fixedly installed on both sides of the semi-enclosed tube, rubber pads are provided between the connecting plates, and fastening screws are threaded through the connecting plates.

[0012] Furthermore, a foam surrounding layer is fixedly installed on the inner wall of the semi-encased tube, and a return pipe communicating with the insulation box is connected to the outer casing of the coaxial tube two.

[0013] This invention provides a heat exchange device for a coaxial sleeve counter-current oxygen generation system. Compared with the prior art, it has the following advantages:

[0014] 1. The coaxial tube and the outer tube form a counter-current flow, ensuring a high heat exchange temperature difference throughout the process and avoiding temperature crossover problems caused by co-current heat exchange. At the same time, the spiral coil enhances turbulent heat exchange.

[0015] By combining the operation of the double-layer spiral recovery, the low-temperature effect in the discharged tube can be effectively circulated back into the inlet tube. Compared with the straight tube heat exchanger, the overall heat transfer coefficient is effectively improved, which can effectively reduce the working load of the dryer and increase the drying process.

[0016] 2. Modular detachable outer pipe: It is assembled from two half-pipes through quick-release connecting parts with rubber pads. There is no need to disassemble the main pipe during maintenance. The bolt connection structure shortens the disassembly and assembly time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the overall structure of this utility model is shown;

[0019] Figure 2 A schematic diagram of the structure of the outer tube and coaxial tube of this utility model is shown;

[0020] Figure 3 A schematic diagram of the internal structure of the coaxial tube of this utility model is shown;

[0021] Figure 4 This invention illustrates the structure of the coaxial tube and the recycling assembly.

[0022] As shown in the diagram: 100, outer casing; 101, semi-casing; 102, return pipe; 103, foam surrounding layer;

[0023] 200. Insulated box body; 201. Base;

[0024] 300. Connecting component; 301. Fastening screw; 302. Rubber pad; 303. Connecting plate;

[0025] 400. Supply component; 401. Infusion pump; 402. Delivery pipe; 403. Output pipe;

[0026] 500. Recycling component; 501. Upper recycling pipe; 502. Adapter; 503. Lower recycling pipe; 504. Connector;

[0027] 600, Coaxial Tube 1; 601, Coaxial Tube 2;

[0028] 700. Freeze-drying machine body. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Example

[0031] To address the technical problems in the background section, the following coaxial sleeve counter-current oxygen generation system heat exchanger is provided:

[0032] Combination Figures 1-4As shown, the coaxial tube counter-current oxygen generation system heat exchange device provided by this utility model includes: a first coaxial tube 600, inside which a second coaxial tube 601 is fitted, and an outer tube 100 is wrapped around the first coaxial tube 600, and the outer tube 100 is composed of two sets of semi-encased tubes 101, with connecting components 300 connected to each other on both sides of the semi-encased tubes 101, and recycling components 500 are installed on both the inner and outer walls of the first coaxial tube 600; and an insulation box 200, which is placed on one side of the first coaxial tube 600.

[0033] The freeze dryer body 700 is used to deeply cool compressed air to separate water. The freeze dryer body 700 is exemplarily a Pilot10-15Pro vacuum freeze dryer.

[0034] Piping connections: The outlet of the freeze dryer body 700 is connected to a coaxial pipe 600 for conveying low-temperature air; its inlet is connected to another coaxial pipe 601 for introducing compressed air to be processed into the freeze dryer body 700.

[0035] Outer tube structure: Two coaxial tubes 600 and 601 are each wrapped with an outer tube 100; the outer tube is not integrally formed, but is formed by two semi-cylindrical semi-encased tubes 101 joined together by bolts to form a sealed cavity wrapped around the coaxial tube.

[0036] Energy recovery assembly arrangement: Energy recovery is implemented on the coaxial tube 600; specifically, an upper recovery tube 501 is spirally installed on its outer wall for the first cold energy recovery; a lower recovery tube 503 is also spirally installed on its inner wall, i.e., inside the inner sleeve of the coaxial tube, for the second, more direct cold energy recovery.

[0037] In this embodiment, a base 201 is fixedly installed at the bottom of the heat preservation box 200, and a supply component 400 is assembled on the top of the base 201. The supply component 400 is installed and connected to the heat preservation box 200 and the upper recycling pipe 501 respectively.

[0038] An insulated box 200 is placed near the coaxial tube 600, which stores a low-temperature heat exchange medium for circulation.

[0039] A metal base 201 is fixedly installed at the bottom of the insulated box 200 by a bracket to stably support the entire recycling device;

[0040] A supply assembly 400 is installed on the base 201. The supply assembly 400 is connected to the medium inside the insulation box 200 through a pipe, and is also connected to the inlet of the upper recovery pipe 501 coiled on the outer wall of the coaxial pipe 600 through a pipe, thus forming the power and supply source of the circulation system.

[0041] In this embodiment, the supply component 400 includes an infusion pump 401, a delivery pipe 402, and an output pipe 403. The infusion pump 401 is fixedly installed on the top of the base 201. The delivery pipe 402 is connected to the output end of the infusion pump 401, and the delivery pipe 402 is connected to the upper recovery pipe 501. The output pipe 403 is connected to the outer tube 100 of the coaxial tube 601, and the output pipe 403 is connected to the lower recovery pipe 503.

[0042] The outlet of the infusion pump 401 is connected to the inlet connector of the top-mounted recovery pipe 501 via a delivery pipe 402, such as a stainless steel hose.

[0043] An interface is opened on the outer tube 100 wrapped by the coaxial tube 2 601 and connected to an output tube 403. The other end of the output tube 403 is connected to the outlet of the heat exchange recovery medium pipeline, i.e., the lower recovery pipe.

[0044] Thus, the infusion pump 401 pumps the refrigerant out of the insulation box 200 and sends it into the recovery component through the delivery pipe 402; the refrigerant after the recovery component has worked flows into the outer tube cavity of the coaxial tube 601 through the output pipe 403.

[0045] In this embodiment, the recycling assembly 500 further includes an adapter 502 and a connector 504. The lower recycling pipe 503 and the upper recycling pipe 501 are connected to each other by the adapter 502. The other ends of the upper recycling pipe 501 and the lower recycling pipe 503 are equipped with connectors 504 that are connected to the conveying pipe 402 and the output pipe 403. The other end of the lower recycling pipe 503 is connected to the output pipe 403.

[0046] The outlet of the upper recovery pipe 501 and the inlet of the lower recovery pipe 503 are located at the same end of the coaxial pipe 600. The two pipes are connected at this end by an adapter 502, so that the medium can be directly transferred from the upper recovery pipe to the lower recovery pipe after flowing out.

[0047] At the other end, the inlet of the top-mounted recovery pipe 501 is equipped with a connector 504 for connecting to the delivery pipe 402;

[0048] Similarly, the outlet of the lower recovery pipe 503 is also equipped with another connector 504 for connecting to the output pipe 403; thus forming a complete recovery flow path.

[0049] In this embodiment, the connecting component 300 includes a fastening screw 301, a rubber pad 302, and a connecting plate 303. The connecting plate 303 is fixedly installed on both sides of the semi-encased tube 101, the rubber pad 302 is provided between the connecting plates 303, and the fastening screw 301 is threaded through the connecting plates 303.

[0050] Each half-tube 101 has a connecting plate 303 with through holes welded to both sides of its edge;

[0051] When the two semi-encased tubes 101 close together and wrap around the coaxial tube, their connecting plates 303 will fit together in pairs.

[0052] A rubber pad 302 is sandwiched between the two sets of mating connecting plates 303 for sealing and shock absorption;

[0053] Finally, by passing the fastening screws 301 and nuts through the through holes of the connecting plate 303 and tightening them, the two semi-encased tubes 101 can be firmly and sealed together, facilitating on-site installation, disassembly and maintenance.

[0054] In this embodiment, a foam surrounding layer 103 is fixedly installed on the inner wall of the semi-encasing tube 101, and a return pipe 102 communicating with the insulation box 200 is connected to the outer casing 100 of the coaxial tube 2 601.

[0055] A layer of insulating foam 103 is adhered to the inner wall of each semi-encased tube 101. When the outer encased tube 100 wraps around the coaxial tube, the foam layer 103 is tightly attached to the outer wall of the coaxial tube, providing good insulation, preventing the loss of cold energy between the recovery chamber and the external environment, and improving the recovery efficiency.

[0056] An outlet is opened at the end of the outer tube 100 of the coaxial tube 601 near the freeze dryer body 700 and connected to a return pipe 102. The other end of the return pipe 102 is connected back to the insulation box 200.

[0057] Working principle and usage process of this utility model:

[0058] When using it, first assemble and connect the device to the coaxial sleeve on the freeze dryer body 700;

[0059] The outer tube 100 is fitted onto the coaxial tube 600 and the coaxial tube 601. The outer tube 100 is formed by combining two half tubes 101 into a tubular structure. After being connected by the connecting plate 303, they are fastened by the fastening screw 301. Then, the conveying pipe 402 and the output pipe 403 are installed and connected to ensure that the device can guide the recovered medium.

[0060] During this process, the freeze dryer 700 operates, and the coaxial tube 600 delivers low-temperature air to the storage or user end. Meanwhile, the infusion pump 401 is activated to extract the heat exchange medium from the insulation box 200 and deliver it through the delivery pipe 402 to the upper recovery pipe 501. The upper recovery pipe 501 then performs a first recovery on the outer wall of the coaxial tube 600, and then enters the lower recovery pipe 503 through the delivery pipe 402. Since the lower recovery pipe 503 is located on the inner wall of the coaxial tube 600, it can then... Secondary recycling involves the medium undergoing circumferential cooling as it passes through the inner and outer surfaces of coaxial tube 600 and coaxial tube 601. Finally, it enters the output tube 403 through the connector 504 at the other end of the lower recycling tube 503, and then enters the outer casing 100 of coaxial tube 601 to pre-cool it, reducing the temperature of the hot gas entering coaxial tube 601 and lowering the preparation load of the freeze dryer 700. Finally, it flows back into the insulation box 200, completing the required circumferential circulation operation.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat exchange device for a coaxial sleeve counter-current oxygen generation system, characterized in that, include: The freeze dryer body (700) has a coaxial tube 1 (600) and a coaxial tube 2 (601) respectively connected to its output end and input end. The coaxial tube 1 (600) and the coaxial tube 2 (601) are wrapped with an outer tube (100), and the outer tube (100) is composed of two sets of semi-encased tubes (101). The two sides of the semi-encased tubes (101) are equipped with interconnected connecting parts (300). The inner and outer walls of the coaxial tube 1 (600) are equipped with recovery components (500). Insulated box (200), the insulated box (200) is placed on one side of coaxial tube (600); The recycling assembly (500) includes an upper recycling pipe (501) and a lower recycling pipe (503), and the upper recycling pipe (501) and the lower recycling pipe (503) are respectively installed around the inner and outer walls of the coaxial tube (600).

2. The heat exchange device for the coaxial sleeve counter-current oxygen generation system according to claim 1, characterized in that: The bottom of the insulated box (200) is fixedly installed with a base (201), and the top of the base (201) is equipped with a supply component (400). The supply component (400) is installed and connected to the insulated box (200) and the upper recycling pipe (501) respectively.

3. The heat exchange device for the coaxial sleeve counter-current oxygen generation system according to claim 2, characterized in that: The supply component (400) includes an infusion pump (401), a delivery pipe (402), and an output pipe (403). The infusion pump (401) is fixedly installed on the top of the base (201). The delivery pipe (402) is connected to the output end of the infusion pump (401), and the delivery pipe (402) is connected to the upper recovery pipe (501). The output pipe (403) is connected to the outer tube (100) of the coaxial tube (601), and the output pipe (403) is connected to the lower recovery pipe (503).

4. The heat exchange device for the coaxial sleeve counter-current oxygen generation system according to claim 3, characterized in that: The recycling assembly (500) also includes an adapter (502) and a connector (504). The lower recycling pipe (503) and the upper recycling pipe (501) are connected to each other at the same end by an adapter (502). The other end of the upper recycling pipe (501) and the lower recycling pipe (503) is equipped with a connector (504) that is connected to the conveying pipe (402) and the output pipe (403). The other end of the lower recycling pipe (503) is connected to the output pipe (403).

5. The heat exchange device for the coaxial sleeve counter-current oxygen generation system according to claim 4, characterized in that: The connecting component (300) includes a fastening screw (301), a rubber pad (302), and a connecting plate (303). The connecting plate (303) is fixedly installed on both sides of the semi-encased tube (101), and a rubber pad (302) is provided between the connecting plates (303). The fastening screw (301) is threaded through the connecting plates (303).

6. The heat exchange device for the coaxial sleeve counter-current oxygen generation system according to claim 5, characterized in that: The inner wall of the semi-encasing tube (101) is fixedly installed with a foam surrounding layer (103), and the outer casing (100) of the coaxial tube (601) is connected with a return pipe (102) that communicates with the insulation box (200).

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