Sectional type gas heat exchanger

Abstract

The invention relates to a sectional type gas heat exchanger, and belongs to the technical field of gas heat exchange, the sectional type gas heat exchanger is formed by splicing more than two gas heat exchange group sections, each gas heat exchange group section comprises a heat insulation box and a heat exchange module, and each gas heat exchange group section comprises a heat insulation box and a heat exchange module. The heat exchange module comprises an inner pipe allowing hot waste gas to pass through and an outer pipe allowing cold fresh air to pass through, the outer pipe is arranged on the periphery of the inner pipe in a sleeving mode, a closed partition cavity is formed between the inner pipe and the outer pipe in a partition mode and communicated with the outside through fresh air guide pipes fixedly arranged at the two ends of the outer pipe, and the two corresponding sides of the heat insulation box are arranged to be connecting faces. The inner pipe is transversely arranged in the heat insulation box, the two ends of the inner pipe are exposed out of the heat insulation box along first through holes correspondingly formed in the two connecting faces respectively, the fresh air guide pipes at the two ends of the outer pipe are exposed out of the heat insulation box along second through holes correspondingly formed in the two connecting faces respectively, and packaging, storage, transportation and cleaning are convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas heat exchange, and in particular relates to a segmented gas heat exchanger. Background Art

[0002] Traditional gas heat exchangers often adopt an integral structure. After assembly, they are large in size and cannot be disassembled into sections, which is not conducive to packaging, storage and transportation. In addition, integral heat exchangers also have common industry problems such as the formation of oil, wax and dust blockage in the hot exhaust pipe, which is difficult to clean and prone to fire. Summary of the Invention

[0003] The present invention aims to provide a segmented gas heat exchange group, aiming to improve the above-mentioned deficiencies existing in the integral gas heat exchanger.

[0004] The present invention adopts the following technical solution:

[0005] The segmented gas heat exchanger is composed of two or more gas heat exchange segments, each of which includes a heat insulation box and a heat exchange module.

[0006] The heat exchange module adopts a dual-channel design, which includes an inner tube for heating exhaust gas to pass through and an outer tube for cooling fresh air to pass through. The outer tube is sleeved on the outer periphery of the inner tube, and end caps are fixed at both ends of the outer tube. The two ends of the inner tube are exposed outside the outer tube through the central through-holes provided on the end caps at the same end. The end caps at both ends of the inner and outer tubes are sealed, thereby forming a closed compartment between the inner and outer tubes. The closed compartment is connected to the outside world through the fresh air ducts fixed at both ends of the outer tube.

[0007] The corresponding two sides of the heat insulation box are set as connecting surfaces, the inner tube is horizontally arranged inside the heat insulation box and its two ends are exposed outside the heat insulation box along the first through holes correspondingly set on the two connecting surfaces, and the fresh air ducts at the two ends of the outer tube are exposed outside the heat insulation box along the second through holes correspondingly set on the two connecting surfaces;

[0008] The inner tube is provided with a thermal superconductor, which is a vacuum tube filled with a thermal superconducting medium. One end of the thermal superconductor is configured as a heat-absorbing section, and the other end is configured as a heat-dissipating section. The outer wall of the heat-dissipating section is axially provided with a plurality of spiral heat-dissipating fins. The thermal superconductor is plugged and fixed into the socket provided in the inner tube wall, so that the heat-absorbing section is exposed in the inner tube and the heat-dissipating section is exposed in the closed compartment.

[0009] The thermal insulation boxes of the gas heat exchange sections are connected to each other to fix all the gas heat exchange sections into one, the inner tubes of the gas heat exchange sections are butt-jointed to connect all the inner tubes into hot exhaust gas pipes, and the fresh air ducts of the gas heat exchange sections are butt-jointed to connect all the closed compartments into cold fresh air channels.

[0010] The present invention is composed of two or more gas heat exchange sections, which is not only convenient for disassembly, packaging, storage, transportation and cleaning, but also can avoid problems such as blockage and fire caused by oil stains and dust remaining in the hot exhaust pipe after cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is one of the overall structural diagrams of the present invention;

[0012] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0013] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0014] Figure 4 It is an exploded view of the overall structure of the present invention.

[0015] Figure 5 This is an external view of the overall structure of the gas heat exchange group section of the present invention;

[0016] Figure 6 A cross-sectional view of a gas heat exchange group section of the present invention;

[0017] Figure 7 This is an exploded view of the heat exchange module of the present invention;

[0018] Figure 8 is a cross-sectional view of a heat exchange module of the present invention;

[0019] Figure 9 This is a schematic diagram of the superconducting heat pipe installation structure of the present invention; DETAILED DESCRIPTION

[0020] In order to better understand the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 4 The segmented gas heat exchanger shown is composed of three gas heat exchange segments arranged along a straight line and having the same structure.

[0022] like Figures 5 to 8As shown, the gas heat exchange group includes a heat insulation box 1 and a heat exchange module. The heat exchange module adopts a double-channel design, which includes an inner tube 2 for hot exhaust gas to pass through and an outer tube 3 for cooling fresh air to pass through. The inner tube 2 and the outer tube 3 are both metal round tubes. The outer tube 3 is sleeved on the outer periphery of the inner tube 2. Both ends of the outer tube 3 are fixed with end covers 3.1. The two ends of the inner tube 2 are respectively exposed outside the outer tube 3 along the central through hole provided on the end cover 3.1 at the same end. The end covers 3.1 at both ends of the inner tube 2 and the outer tube 3 are sealed and connected, so that a partition is formed between the inner tube 2 and the outer tube 3 to prevent leakage of hot exhaust gas or heat. The short-circuited closed compartment 4 is connected to the outside world through the fresh air duct 5 provided at both ends of the outer tube 3; the heat-insulating box 1 is a rectangular box and its two short sides are set as connecting surfaces. The inner tube 2 is horizontally arranged inside the heat-insulating box 1 and its two ends are exposed to the outside of the heat-insulating box 1 along the first through holes corresponding to the two connecting surfaces. The fresh air ducts 5 at both ends of the outer tube 3 are exposed to the outside of the heat-insulating box 1 along the second through holes corresponding to the two connecting surfaces. The outer tube 3 is wrapped in the heat-insulating box 1 as a whole, which can reduce the heat loss of the inner tube 2 and the outer tube 3, and at the same time protect the internal structure from interference from the external environment.

[0023] like Figures 6 to 8 As shown, the outer wall of the inner tube 2 is spirally provided with a spiral guide plate 11 extending to its two ends. The outer edge of the spiral guide plate 11 is tightly abutted against the inner wall of the outer tube 3 to form a fresh air spiral flow channel in the closed compartment 4. The two ends of the fresh air spiral flow channel are respectively connected to the fresh air ducts 5 at the two ends of the outer tube 3. During operation, the hot exhaust gas can flow axially in the inner tube 2, and the cold fresh air can flow around the inner tube 2 along the spiral flow channel, which can extend the heat exchange time between the hot exhaust gas and the cold fresh air, making the heat exchange between the hot exhaust gas and the cold fresh air more sufficient.

[0024] like Figures 6 to 9 As shown, in order to further accelerate the heat exchange between the hot exhaust gas in the inner tube 2 and the cold fresh air in the closed compartment 4, a number of heat superconducting tubes 6 are arranged on the wall of the inner tube 2. Figure 4 As shown, the thermal superconducting tube 6 is a vacuum tube filled with a thermal superconducting medium. One end of the thermal superconducting tube 6 is designated as a heat absorbing section 6.1, the other end as a heat dissipating section 6.2, a spacer ring 6.3 is provided on the central outer wall, and a plurality of heat sinks 6.21 are axially provided on the outer wall of the heat dissipating section 6.2 to increase the heat dissipation area. The thermal superconducting tube 6 is inserted and fixed into a socket provided in the wall of the inner tube 2, so that the heat absorbing section 6.1 is exposed within the inner tube 2 and the heat dissipating section 6.2 is exposed within the enclosed compartment 4. During use, the heat absorbing section 6.1 absorbs heat from the hot exhaust gas flowing through the inner tube 2 and transfers it to the heat dissipating section 6.2, which in turn heats the cool fresh air flowing through the enclosed compartment 4. The thermal superconducting medium accelerates the transfer of heat from the heat absorbing section 6.1 to the heat dissipating section 6.2, and the spiral heat sinks 6.21 accelerate the heat dissipation of the heat dissipating section 6.2.

[0025] like Figure 9As shown, the end of heat dissipation section 6.2 is provided with a port for injecting a thermal superconducting medium into superconducting heat pipe 6. The port is threadedly sealed with a cap 7. The thermal superconducting medium can be a gaseous heat transfer medium, a liquid heat transfer medium, or a vapor-liquid mixed heat transfer medium. A vapor-liquid mixed heat transfer medium is preferred to achieve rapid and uniform heat transfer.

[0026] like Figures 5 to 8 As shown, in order to facilitate the splicing between different sections, a first flange 2.1 is fixed at both ends of the inner tube 2; the inner end of the fresh air duct 5 is inserted and fixed in the pipe hole provided in the wall of the outer tube 3, the pipe body is connected to the pipe sleeve 3.11 provided on the outer edge of the end cover 3.1 on the same side, and the outer end is exposed outside the connecting surface on the same side of the insulation box 1.

[0027] like Figure 1-4 As shown, the insulation boxes 1 of adjacent gas heat exchange sections are interconnected by a rectangular frame 8 to fix all the gas heat exchange sections as a whole, and the inner tubes 2 of adjacent gas heat exchange sections are connected to each other by the first flanges 2.1 at the corresponding ends to connect all the inner tubes 2 into hot exhaust gas pipes, and the fresh air ducts 5 of adjacent gas heat exchange sections are interconnected by a connecting pipe 12 to connect all the closed compartments 4 into cold fresh air channels.

[0028] like Figures 1 to 4 As shown, a hot exhaust gas inlet cover 9 and a hot exhaust gas outlet cover 10 are respectively provided at both ends of the hot exhaust gas channel, and the fresh air ducts 5 located at both ends of the cold fresh air channel are respectively used as the cold fresh air inlet pipe 5' and the cold fresh air outlet pipe 5", the cold fresh air inlet pipe 5' is arranged at the same end of the hot exhaust gas outlet cover 10, and the cold fresh air outlet pipe 5" is arranged at the same end of the hot exhaust gas inlet cover 9, so that the flow directions of the hot exhaust gas and the cold fresh air are opposite, forming a cross heat exchange path, which is conducive to speeding up the heat exchange speed.

[0029] It should be noted that the present invention is not limited to the use of three gas heat exchange segments, and more than two gas heat exchange segments can be spliced ​​and assembled as needed.

Claims

1. Segmented gas heat exchanger, characterized by: It is composed of two or more gas heat exchange groups with the same structure, each gas heat exchange group comprises a heat insulation box (1) and a heat exchange module, wherein: The heat exchange module adopts a double-channel design, which includes an inner tube (2) for heating exhaust gas to pass through and an outer tube (3) for cooling fresh air to pass through. The outer tube (3) is sleeved on the outer periphery of the inner tube (2). End caps (3.1) are fixedly provided at both ends of the outer tube (3). The two ends of the inner tube (2) are exposed outside the outer tube (3) along the central through holes provided on the end caps (3.1) at the same end. The end caps (3.1) at both ends of the inner tube (2) and the outer tube (3) are sealed and connected, thereby forming a closed compartment (4) between the inner tube (2) and the outer tube (3). The closed compartment (4) is connected to the outside through the fresh air ducts (5) fixedly provided at both ends of the outer tube (3); The corresponding two sides of the heat insulation box (1) are provided as connection surfaces, the inner tube (2) is horizontally arranged inside the heat insulation box (1) and its two ends are exposed outside the heat insulation box (1) along first through holes correspondingly provided on the two connection surfaces, and the fresh air ducts (5) at the two ends of the outer tube (3) are exposed outside the heat insulation box (1) along second through holes correspondingly provided on the two connection surfaces; A thermal superconducting tube (6) is arranged on the wall of the inner tube (2). The thermal superconducting tube (6) is a vacuum tube filled with a thermal superconducting medium. One end of the thermal superconducting tube (6) is set as a heat absorbing section (6.1), and the other end is set as a heat dissipating section (6.2). A plurality of spiral heat dissipating fins (6.21) are axially arranged on the outer wall of the heat dissipating section (6.2). The thermal superconducting tube (6) is plugged and fixed into a socket provided on the wall of the inner tube (2), so that the heat absorbing section (6.1) is exposed in the inner tube (2) and the heat dissipating section (6.2) is exposed in the closed compartment (4). The heat insulation boxes (1) of the gas heat exchange segments are connected to each other to fix all the gas heat exchange segments into one body, the inner tubes (2) of the gas heat exchange segments are butted against each other to connect all the inner tubes (2) into a hot exhaust gas duct, and the fresh air ducts (5) of the gas heat exchange segments are butted against each other to connect all the closed compartments (4) into a cold fresh air channel.

2. The segmented gas heat exchanger according to claim 1, characterized in that: The heat insulation box (1) is a rectangular box body, and its two short side surfaces are set as connecting surfaces.

3. The segmented gas heat exchanger according to claim 1, characterized in that: The inner tube (2) and the outer tube (3) are both metal round tubes.

4. The segmented gas heat exchanger according to claim 3, characterized in that: The outer peripheral wall of the inner tube (2) is spirally provided with a spiral guide plate (11) extending toward both ends thereof, and the outer edge of the spiral guide plate (11) is in close contact with the inner wall of the outer tube (3) to form a fresh air spiral flow channel in the closed compartment (4), and the two ends of the fresh air spiral flow channel are respectively connected to the fresh air ducts (5) at both ends of the outer tube (3).

5. The segmented gas heat exchanger according to claim 4, characterized in that: Both ends of the inner tube (2) are fixedly provided with first flanges (2.1).

6. The segmented gas heat exchanger according to claim 6, characterized in that: The inner end of the fresh air duct (5) is inserted and fixed in a pipe hole provided in the pipe wall of the outer pipe (5), the pipe body is connected to the pipe sleeve (3.11) provided on the outer edge of the end cover (3.1) on the same side, and the outer end is exposed outside the connecting surface on the same side of the heat insulation box (3.1).

7. The segmented gas heat exchanger according to claim 6, characterized in that: The heat insulation boxes (1) of adjacent gas heat exchange sections are connected to each other via a rectangular frame (8), the inner tubes (2) of adjacent gas heat exchange sections are butted against each other via first flanges (2.1) at corresponding ends, and the fresh air ducts (5) of adjacent gas heat exchange sections are butted against each other via respective second flanges (5.1).

8. The segmented gas heat exchanger according to claim 1, characterized in that: A hot exhaust gas inlet cover (9) and a hot exhaust gas outlet cover (10) are respectively provided at both ends of the hot exhaust gas channel. The fresh air ducts (5) located at both ends of the cold fresh air channel serve as a cold fresh air inlet pipe (5') and a cold fresh air outlet pipe (5"), respectively. The cold fresh air inlet pipe (5') is provided at the same end as the hot exhaust gas outlet cover (10), and the cold fresh air outlet pipe (5") is provided at the same end as the hot exhaust gas inlet cover (9), so that the hot exhaust gas and the cold fresh air flow in opposite directions.

9. The segmented gas heat exchanger according to claim 1, characterized in that: The end of the heat dissipation section (6.2) is provided with a port for injecting a thermal superconducting medium into the superconducting heat pipe (6), and the port is provided with a cover (7).

Images