A chimney flue gas waste heat deep recovery heat exchanger

Abstract

The utility model discloses a chimney flue gas waste heat depth recovery heat exchanger, including the box, air inlet pipe and air outlet pipe, air inlet pipe and air outlet pipe are fixedly connected respectively at the both sides of box, and the pipe wall of air inlet pipe and air outlet pipe is fixedly provided with temperature sensor respectively, the inside of box is equipped with the gas pipe, the top fixedly connected with the apron of box, the inside fixedly connected with the heat exchange pipe of apron, the inner wall of apron is equipped with the cavity, the inner wall fixed of cavity is equipped with spring, the end fixedly connected with the plug of spring, in the utility model, spring pushes and inserts the plug into the limiting slot, and the plug is closely combined with the limiting slot, and the sealed connection of apron and box is ensured, prevents flue gas leakage, and the rotating ring is tightened and is drawn the rope, and at this time, spring is compressed, and the plug is separated from the slot, and the quick disassembly of apron can be completed, and the heat conduction fin and heat exchange pipe are convenient to take out and maintain replacement, and the gas pipe in the inside of box is handled simultaneously and is convenient to overhaul.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery heat exchanger technology, specifically a deep waste heat recovery heat exchanger for chimney flue gas. Background Technology

[0002] Waste heat recovery heat exchangers are devices that recover and reuse waste heat generated in industrial production or other processes. They transfer waste heat to the medium that needs to be heated through heat exchange principles, thereby achieving efficient energy utilization and reducing energy consumption. The core principle of waste heat recovery heat exchangers is to use heat transfer methods such as heat conduction, heat convection and heat radiation to exchange heat between high-temperature waste heat fluid and low-temperature medium without direct contact.

[0003] In existing technologies, during the use of waste heat recovery heat exchangers, flue gas flows through the tubes and cannot undergo sufficient and efficient heat exchange, resulting in heat loss and affecting heat exchange quality. Furthermore, after prolonged use, impurities in the flue gas accumulate inside the tubes, which are typically curved. The connection between the tubes and the heat exchanger is usually secured with bolts and clamps, making it difficult to remove the tubes for maintenance in confined spaces, thus impacting the subsequent use of the waste heat recovery heat exchanger. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a deep heat exchanger for waste heat recovery from flue gas in chimneys, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution.

[0006] This utility model provides a deep heat exchanger for waste heat recovery from chimney flue gas, including a housing, an inlet pipe, and an outlet pipe. The inlet pipe and outlet pipe are respectively fixedly connected to both sides of the housing. Temperature sensors are fixedly sleeved on the pipe walls of the inlet pipe and outlet pipe, respectively. A gas delivery pipe is provided inside the housing. A cover plate is fixedly connected to the top of the housing. A heat exchange pipe is fixedly connected inside the cover plate. A cavity is formed in the inner wall of the cover plate. A spring is fixedly installed in the inner wall of the cavity. An insert is fixedly connected to the end of the spring. The insert is slidably disposed in the inner wall of the cavity. A limit slot is formed in the inner wall of the housing. The insert is inserted into the inner wall of the limit slot. A pull rope is fixedly connected to the connection between the insert and the spring. A through groove is formed inside the cover plate. The end of the pull rope away from the insert extends into the through groove.

[0007] Preferably, the two ends of the gas supply pipe are respectively attached to the end of the inlet pipe and the outlet pipe located inside the box.

[0008] Preferably, the gas supply pipe is configured as a serpentine pipe, and the heat exchange pipe is configured with bends.

[0009] Preferably, the bottom of the cover plate is fixedly connected with multiple heat-conducting fins, and the heat exchange tube is arranged through the multiple heat-conducting fins.

[0010] Preferably, a rotating rod is rotatably connected inside the through groove, and the end of the pull rope away from the insert block is fixedly connected to the rotating rod.

[0011] Preferably, the top wall of the rotating rod extends through the through groove to the top of the cover plate and is fixedly connected to a rotating ring.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This deep heat recovery heat exchanger for waste heat from chimney flue gas uses a spring to push a plug into a limiting slot. The plug fits tightly with the limiting slot, ensuring a sealed connection between the cover plate and the housing to prevent flue gas leakage. Rotating the rotating ring tightens the pull rope, at which point the spring is compressed, and the plug disengages from the slot, allowing for quick removal of the cover plate. This facilitates the removal of the heat-conducting fins and heat exchange tubes for maintenance and replacement, and also makes it convenient to inspect and repair the gas transmission pipes inside the housing.

[0013] 2. This deep heat recovery heat exchanger for waste heat from chimney flue gas enters the housing through the inlet pipe and flows slowly through the gas delivery pipe, extending the residence time to ensure full heat release. Low-temperature medium flows in from one end of the heat exchange tube and flows in the opposite direction to the gas delivery pipe along the bend path. Heat transfer is enhanced through heat-conducting fins, improving heat exchange efficiency.

[0014] 3. The deep heat recovery heat exchanger for waste heat from the chimney flue gas monitors the flue gas temperature in real time through temperature sensors in the inlet and outlet pipes. When the temperature in the outlet pipe is too high, the temperature sensor can transmit the data to the main control device in a timely manner, so that it can adjust the flow rate of the heat exchange medium. The temperature difference data is fed back in real time, which is convenient for evaluating the waste heat recovery efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial structural cross-sectional view of the present invention; Figure 3 for Figure 2 A magnified schematic diagram of part A in the middle section.

[0016] In the diagram: 1. Housing, 2. Inlet pipe, 3. Outlet pipe, 4. Gas supply pipe, 5. Temperature sensor, 6. Cover plate, 7. Heat exchanger pipe, 8. Heat-conducting fins, 9. Spring, 10. Insert block, 11. Pull rope, 12. Rotating rod, 13. Rotating ring. Detailed Implementation

[0017] A deep heat exchanger for recovering waste heat from flue gas in a chimney, such as Figure 1-3 The device includes a housing 1, an air inlet pipe 2, and an air outlet pipe 3. The air inlet pipe 2 and the air outlet pipe 3 are fixedly connected to the two sides of the housing 1, respectively. Temperature sensors 5 are fixedly sleeved on the walls of the air inlet pipe 2 and the air outlet pipe 3, respectively. An air supply pipe 4 is provided inside the housing 1. A cover plate 6 is fixedly connected to the top of the housing 1. A heat exchange pipe 7 is fixedly connected inside the cover plate 6. A cavity is opened in the inner wall of the cover plate 6. A spring 9 is fixedly installed in the inner wall of the cavity. An insert block 10 is fixedly connected to the end of the spring 9. The insert block 10 is slidably disposed in the inner wall of the cavity. A limit slot is opened in the inner wall of the housing 1. The insert block 10 is inserted into the inner wall of the limit slot.

[0018] The two ends of the gas supply pipe 4 are respectively attached to the inlet pipe 2 and the outlet pipe 3 at one end inside the box 1. The gas supply pipe 4 is set as a serpentine pipe. The heat exchange pipe 7 is bent. Multiple heat-conducting fins 8 are fixedly connected to the bottom of the cover plate 6. The heat exchange pipe 7 is set through the multiple heat-conducting fins 8.

[0019] In summary: Through the flue gas flow process: high-temperature flue gas enters the housing 1 from the inlet pipe 2 and flows slowly through the gas delivery pipe 4, extending the residence time to ensure sufficient heat release. Low-temperature medium flows in from one end of the heat exchange pipe 7 and flows in the opposite direction to the gas delivery pipe 4 along the bend path. Heat transfer is enhanced by the heat-conducting fins 8, improving heat exchange efficiency. Temperature sensors 5 of the inlet pipe 2 and the outlet pipe 3 monitor the flue gas temperature in real time. When the temperature in the outlet pipe 3 is too high, the temperature sensor 5 can transmit the data to the main control device in a timely manner, so that it can adjust the flow rate of the heat exchange medium. The temperature difference data is fed back in real time, which is convenient for evaluating the waste heat recovery efficiency.

[0020] Spring 9 pushes the insert 10 into the limiting slot, and the insert 10 fits tightly with the limiting slot to ensure a sealed connection between the cover 6 and the box 1 and prevent smoke leakage.

[0021] To facilitate the removal of the heat-conducting fins 8 and heat exchange tubes 7 for maintenance and replacement, such as Figure 1-3 As shown, a pull rope 11 is fixedly connected to the connection between the insert block 10 and the spring 9. A through groove is opened inside the cover plate 6. The end of the pull rope 11 away from the insert block 10 extends into the inside of the through groove. A rotating rod 12 is rotatably connected inside the through groove. The end of the pull rope 11 away from the insert block 10 is fixedly connected to the rotating rod 12. The top wall of the rotating rod 12 extends through the through groove to the top of the cover plate 6 and is fixedly connected to a rotating ring 13.

[0022] Rotating the ring 13 tightens the pull rope 11, at which point the spring 9 is compressed and the insert block 10 disengages from the slot, allowing for quick disassembly of the cover plate 6. This facilitates the removal of the heat-conducting fins 8 and heat exchange tubes 7 for maintenance and replacement, and also makes it convenient to inspect and repair the gas supply pipe 4 inside the housing 1.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A deep heat exchanger for waste heat recovery from chimney flue gas, comprising a housing (1), an inlet pipe (2), and an outlet pipe (3), characterized in that: The air inlet pipe (2) and the air outlet pipe (3) are fixedly connected to the two sides of the box body (1). Temperature sensors (5) are fixedly sleeved on the pipe walls of the air inlet pipe (2) and the air outlet pipe (3). The box body (1) is provided with an air supply pipe (4). The top of the box body (1) is fixedly connected with a cover plate (6). The inside of the cover plate (6) is fixedly connected with a heat exchange pipe (7). The inner wall of the cover plate (6) is provided with a cavity. The inner wall of the cavity is fixedly provided with a spring (9). The end of the spring (9) is fixedly connected with a plug (10). The plug (10) is slidably disposed on the inner wall of the cavity. The inner wall of the box body (1) is provided with a limit slot. The plug (10) is inserted into the inner wall of the limit slot. A pull rope (11) is fixedly connected at the connection between the plug (10) and the spring (9). The inside of the cover plate (6) is provided with a through groove. The end of the pull rope (11) away from the plug (10) extends into the inside of the through groove.

2. The deep heat recovery heat exchanger for flue gas waste heat according to claim 1, characterized in that: The two ends of the gas supply pipe (4) are respectively attached to the end of the inlet pipe (2) and the outlet pipe (3) located inside the box (1).

3. The deep heat recovery heat exchanger for flue gas waste heat according to claim 1, characterized in that: The gas transmission pipe (4) is configured as a serpentine pipe, and the heat exchange pipe (7) is configured as a bent pipe.

4. The deep heat recovery heat exchanger for flue gas waste heat according to claim 1, characterized in that: The bottom of the cover plate (6) is fixedly connected with multiple heat-conducting fins (8), and the heat exchange tube (7) is arranged through the multiple heat-conducting fins (8).

5. The deep heat recovery heat exchanger for flue gas waste heat according to claim 1, characterized in that: The through groove is rotatably connected to a rotating rod (12), and the end of the pull rope (11) away from the insert block (10) is fixedly connected to the rotating rod (12).

6. The deep heat recovery heat exchanger for flue gas waste heat according to claim 1, characterized in that: The top wall of the rotating rod (12) extends through the through groove to the top of the cover plate (6) and is fixedly connected to a rotating ring (13).

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