Chemical industrial waste gas waste heat recovery device

Abstract

The utility model discloses a chemical industrial waste gas waste heat recovery device which comprises a heat exchange cylinder, a gas inlet cover is fixedly installed at one end of the heat exchange cylinder, the end, away from the heat exchange cylinder, of the gas inlet cover is communicated with a gas expansion cover, the end, away from the heat exchange cylinder, of the gas expansion cover is communicated with a gas inlet pipe, and a gas outlet cover is fixedly installed at the other end of the heat exchange cylinder. According to the waste gas heat exchanger, the arranged cavity plate is in a flat shape, introduced gas can be in a tiled state, the contact area between the gas and the cavity plate is greatly increased through the tiled state, and therefore heat in waste gas can be more efficiently transmitted into clear water in the heat exchange barrel through the cavity plate, heat exchange is conducted between the waste gas and the clear water, and the heat exchange efficiency is improved. The heat in the waste gas is effectively absorbed and transferred into the clear water, so that the heat in the waste gas is recycled, the temperature of the waste gas in the chemical industry is reduced, the thermal pollution of the waste gas to the environment is reduced, valuable heat energy is provided for the clear water, and subsequent utilization of hot water is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to a waste heat recovery device for waste gas in a chemical industry. Background Art

[0002] In the production of the chemical industry, chemical plants generate a large amount of high-temperature exhaust gas. The direct discharge of high-temperature exhaust gas will not only pollute the atmospheric environment, but the heat contained in the exhaust gas will also be wasted, thereby causing cost losses in production and processing.

[0003] After searching, the patent announcement number CN216815113U discloses a waste heat recovery device for chemical industrial waste gas, and its technical solution includes: a shell, a water pipe, a heat exchange pipe and a cleaning component. A protective cover is installed on the top of the shell, a slide rail is installed inside the protective cover, a linear motor is installed on the outside of the slide rail, a connecting plate is installed at the bottom of the linear motor, a cleaning component is installed at the bottom of the connecting plate, a mounting frame is installed in the cleaning component, two sets of shaft seats are installed on one side of the mounting frame, a roller is installed on one side of the shaft seat, and a cleaning belt is installed around the outside of the roller.

[0004] The above scheme cleans the dust on both sides of the heat exchange tube by contacting the cleaning belt with the outer side of the heat exchange tube, so that the dust can be detached from the outer side of the heat exchange tube, avoiding dust accumulation and dirt affecting the heat transfer effect of the heat exchange tube. However, there are still defects. The above device uses a coil for heat exchange. When the gas passes through the coil, due to the uneven distribution of the airflow, especially the poor gas flow in the center area, it cannot fully contact the inner wall of the coil, resulting in poor exhaust gas heat exchange efficiency at the center of the coil, affecting the heat exchange effect and efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a waste heat recovery device for waste gas in the chemical industry to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste heat recovery device for waste gas from chemical industry, comprising a heat exchange cylinder, an air inlet hood is fixedly installed at one end of the heat exchange cylinder, the air inlet hood is connected to an air expansion hood at the end away from the heat exchange cylinder, the air expansion hood is connected to an air inlet pipe at the end away from the heat exchange cylinder, an air outlet hood is fixedly installed at the other end of the heat exchange cylinder, the air outlet hood is connected to an air outlet pipe at the end away from the heat exchange cylinder, one side of the top of the heat exchange cylinder is connected to a water inlet pipe, one side of the bottom of the heat exchange cylinder is connected to a water outlet pipe, a heat exchange component is installed inside the heat exchange cylinder, and a drive component is installed inside the air outlet hood.

[0007] The heat exchange assembly includes thirteen cavity plates, and both ends of the thirteen cavity plates are connected with air guide pipes.

[0008] Preferably, the air guide pipes at both ends of the cavity plate are rotatably mounted inside the air inlet hood and the air outlet hood respectively.

[0009] Preferably, the driving assembly includes exhaust pipe three, eight exhaust pipe twos and four exhaust pipe ones, a driving gear is fixedly installed on the outer side of the exhaust pipe three, and driven gears are fixedly installed on the outer sides of the eight exhaust pipe twos. A rotating column is fixedly installed on one end of the exhaust pipe three, and a rotating fan is fixedly installed on the end of the rotating column away from the exhaust pipe three, and the driving gear is meshed with the other four driven gears through four driven gears.

[0010] Preferably, a partition is fixedly installed inside the air outlet hood, an exhaust port is opened on the outer side of the exhaust pipe three, the exhaust pipe one, the exhaust pipe two and the exhaust port are all located between the partition and the side wall of the air outlet hood close to one end of the heat exchange tube, the rotating column is rotatably installed inside the partition, and a connecting groove is opened inside the partition.

[0011] Preferably, a protection frame is fixedly mounted on one side of the partition, the rotating fan is located on the inner side of the protection frame, and the side of the protection frame away from the partition is fixedly connected to the inner wall of the air outlet hood away from the heat exchange cylinder.

[0012] Preferably, two oblique air guide baffles are fixedly installed on one side of the partition with a protective frame, and the two oblique air guide baffles are located on both sides of the connecting groove; two straight air guide baffles are fixedly installed on one side of the partition with a protective frame, and the two straight air guide baffles are located on both sides of the connection between the air outlet pipe and the air outlet hood.

[0013] Compared with the prior art, the utility model has the following beneficial effects: by setting the cavity plate in a flat shape, the gas introduced can be laid flat, which greatly increases the contact area between the gas and the cavity plate, so that the heat inside the exhaust gas can be more efficiently transferred to the clean water inside the heat exchange cylinder through the cavity plate, and the heat exchange between the exhaust gas and the clean water is performed. The heat in the exhaust gas is effectively absorbed and transferred to the clean water, realizing the recovery and utilization of the heat in the exhaust gas, which not only helps to reduce the temperature of the chemical industry exhaust gas and reduce its thermal pollution to the environment, but also provides valuable thermal energy for the clean water, which is convenient for the subsequent use of hot water;

[0014] In addition, when the exhaust gas is discharged into the interior of the exhaust hood through the exhaust pipe 1, the exhaust pipe 2 and the exhaust port, it will impact the rotating fan, so that the rotating fan rotates, driving the rotating column to rotate, thereby driving the driving gear to rotate through the exhaust pipe 3, thereby driving nine of the cavity plates to rotate. The rotation of the cavity plate not only improves the basic effect of the outer side of the cavity plate and the clean water, and improves the heat exchange efficiency, but also can stir the clean water inside the heat exchange cylinder to ensure that the temperature of each position of the clean water is uniform, ensure the uniformity of heat exchange, and realize the efficient recovery and utilization of heat in the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model when viewed from above.

[0017] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the utility model.

[0018] Figure 4 It is a schematic diagram of the partial appearance structure of the utility model.

[0019] In the figure: 1. heat exchange cylinder; 2. air inlet hood; 3. air outlet hood; 4. air expansion hood; 5. air inlet pipe; 6. water inlet pipe; 7. water outlet pipe; 8. air outlet pipe; 9. air guide pipe; 10. cavity plate; 11. exhaust pipe 1; 12. exhaust pipe 2; 13. driven gear; 14. exhaust pipe 3; 15. driving gear; 16. exhaust port; 17. rotating column; 18. protective frame; 19. connecting groove; 20. air guide oblique baffle; 21. air guide straight baffle; 22. partition; 23. rotating fan. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 4The utility model provides a technical solution: a waste heat recovery device for waste gas from chemical industry, comprising a heat exchange cylinder 1, an air inlet hood 2 is fixedly installed at one end of the heat exchange cylinder 1, an end of the air inlet hood 2 away from the heat exchange cylinder 1 is connected with an air expansion hood 4, an end of the air expansion hood 4 away from the heat exchange cylinder 1 is connected with an air inlet pipe 5, an air outlet hood 3 is fixedly installed at the other end of the heat exchange cylinder 1, an end of the air outlet hood 3 away from the heat exchange cylinder 1 is connected with an air outlet pipe 8, one side of the top of the heat exchange cylinder 1 is connected with a water inlet pipe 6, one side of the bottom of the heat exchange cylinder 1 is connected with a water outlet pipe 7, a heat exchange component is installed inside the heat exchange cylinder 1, the heat exchange component comprises thirteen cavity plates 10, both ends of the thirteen cavity plates 10 are connected with air guide pipes 9, the air guide pipes 9 at both ends of the cavity plates 10 are rotatably installed inside the air inlet hood 2 and the air outlet hood 3, a drive component is installed inside the air outlet hood 3, and the drive component comprises Exhaust pipe three 14, eight exhaust pipe twos 12 and four exhaust pipe one 11, a driving gear 15 is fixedly installed on the outer side of the exhaust pipe three 14, and a driven gear 13 is fixedly installed on the outer sides of the eight exhaust pipe twos 12. A rotating column 17 is fixedly installed at one end of the exhaust pipe three 14, and a rotating fan 23 is fixedly installed at the end of the rotating column 17 away from the exhaust pipe three 14. The driving gear 15 is meshed with the other four driven gears 13 through four driven gears 13. A partition 22 is fixedly installed inside the air outlet hood 3, and an exhaust port 16 is opened on the outer side of the exhaust pipe three 14. The exhaust pipe one 11, the exhaust pipe two 12 and the exhaust port 16 are all located between the partition 22 and the side wall of the air outlet hood 3 close to one end of the heat exchange tube 1. The rotating column 17 is rotatably installed inside the partition 22, and a connecting groove 19 is opened inside the partition 22.

[0022] The working principle of the above technical solution is as follows: first, open the valve inside the water inlet pipe 6, and then inject clean water into the interior of the heat exchange tube 1 through the water inlet pipe 6, and then introduce the chemical industrial waste gas through the air inlet pipe 5, and the waste gas enters the interior of the air inlet cover 2 through the air expansion cover 4, and then disperses into the interior of the thirteen cavity plates 10 through the thirteen air guide pipes 9. The cavity plates 10 are flat, so that the introduced gas can be in a flat state. The flat state greatly increases the contact area between the gas and the cavity plates 10, so that the heat inside the waste gas can be more efficiently transferred to the clean water inside the heat exchange tube 1 through the cavity plates 10, which is beneficial to the waste gas. Heat is exchanged between the exhaust gas and the clean water, and the heat in the exhaust gas is effectively absorbed and transferred to the clean water, realizing the recovery and utilization of the heat in the exhaust gas, which not only helps to reduce the temperature of the chemical industry exhaust gas and reduce its thermal pollution to the environment, but also provides valuable thermal energy for the clean water, which is convenient for the subsequent use of hot water. The exhaust gas after heat exchange will be discharged into the exhaust pipe 1 11, the exhaust pipe 2 12 and the exhaust pipe 3 14 through the air guide pipe 9 at the other end of the cavity plate 10, and then discharged into the exhaust hood 3 through the exhaust pipe 1 11, the exhaust pipe 2 12 and the exhaust port 16, and then discharged through the exhaust pipe 8;

[0023] In addition, when the exhaust gas is discharged into the interior of the exhaust hood 3 through the exhaust pipe 1 11, the exhaust pipe 2 12 and the exhaust port 16, it will first be discharged into one side of the partition 22, and then discharged into the other side of the partition 22 through the connecting groove 19, and impact the rotating fan 23, so that the rotating fan 23 rotates, driving the rotating column 17 to rotate, thereby driving the driving gear 15 to rotate through the exhaust pipe 3 14, thereby driving the exhaust pipe 2 12 to rotate through the driven gear 13, thereby driving nine of the air guide pipes 9 to rotate, and driving nine of the cavity plates 10 to rotate. The rotation of the cavity plate 10 not only improves the basic effect of the outer side of the cavity plate 10 and the clean water, and improves the heat exchange efficiency, but also can stir the clean water inside the heat exchange tube 1, to ensure that the temperature of each position of the clean water is uniform, to ensure the uniformity of heat exchange, and to achieve efficient recovery and utilization of heat in the exhaust gas.

[0024] In another embodiment, Figure 1-Figure 4 As shown, a protective frame 18 is fixedly installed on one side of the partition 22, and the rotating fan 23 is located on the inner side of the protective frame 18. The side of the protective frame 18 away from the partition 22 is fixedly connected to the inner wall of the air outlet hood 3 away from the heat exchange tube 1. Two air guide oblique baffles 20 are fixedly installed on the side of the partition 22 on which the protective frame 18 is installed, and the two air guide oblique baffles 20 are located on both sides of the connecting groove 19. Two air guide straight baffles 21 are fixedly installed on the side of the partition 22 on which the protective frame 18 is installed, and the two air guide straight baffles 21 are located on both sides of the connection between the air outlet pipe 8 and the air outlet hood 3.

[0025] The exhaust gas discharged through the connecting groove 19 can be guided by the inclined air guide baffle 20 , the protection frame 18 and the straight air guide baffle 21 , so that the exhaust gas can impact the surface of the rotating fan 23 , causing the rotating fan 23 to rotate, and then be discharged through the exhaust pipe 8 .

[0026] Working principle: First, open the valve inside the water inlet pipe 6, and then inject clean water into the heat exchange cylinder 1 through the water inlet pipe 6, and then introduce chemical industrial waste gas through the air inlet pipe 5. The waste gas enters the interior of the air inlet hood 2 through the air expansion hood 4, and then disperses into the interior of the thirteen cavity plates 10 through the thirteen air guide pipes 9. The cavity plates 10 are flat, which can make the introduced gas flat. The flat state greatly increases the contact area between the gas and the cavity plates 10, so that the heat inside the waste gas can be more efficiently transferred to the heat exchange through the cavity plates 10. In the clean water inside the cylinder 1, heat exchange is carried out between the exhaust gas and the clean water, and the heat in the exhaust gas is effectively absorbed and transferred to the clean water, realizing the recovery and utilization of the heat in the exhaust gas, which not only helps to reduce the temperature of the chemical industry exhaust gas and reduce its thermal pollution to the environment, but also provides valuable thermal energy for the clean water, which is convenient for the subsequent use of hot water. The exhaust gas after heat exchange will be discharged into the exhaust pipe 1 11, the exhaust pipe 2 12 and the exhaust pipe 3 14 through the air guide pipe 9 at the other end of the cavity plate 10, and then through the exhaust pipe 1 11, the exhaust pipe 2 12 and the exhaust port 16 are discharged into the interior of the air outlet hood 3, and then discharged through the exhaust pipe 8; when the external exhaust gas is discharged into the interior of the air outlet hood 3 through the exhaust pipe 1 11, the exhaust pipe 2 12 and the exhaust port 16, it will first be discharged into one side of the partition 22, and then discharged into the other side of the partition 22 through the connecting groove 19. The exhaust gas discharged through the connecting groove 19 can be guided by the arranged air guide oblique baffle 20, the protective frame 18 and the air guide straight baffle 21, so that the exhaust gas can impact the surface of the rotating fan 23, so that the rotating fan 23 rotates, driving the rotating fan 23 to rotate. The column 17 rotates, thereby driving the driving gear 15 to rotate through the exhaust pipe three 14, thereby driving the exhaust pipe two 12 to rotate through the driven gear 13, thereby driving nine of the air guide pipes 9 to rotate, and driving nine of the cavity plates 10 to rotate. The rotation of the cavity plate 10 not only improves the basic effect of the outside of the cavity plate 10 and the clean water, and improves the heat exchange efficiency, but also can stir the clean water inside the heat exchange tube 1, to ensure that the temperature of each position of the clean water is uniform, to ensure the uniformity of heat exchange, and to achieve efficient recovery and utilization of heat in the exhaust gas.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for chemical industry waste gas, comprising a heat exchange cylinder (1), characterized in that: An air inlet hood (2) is fixedly mounted on one end of the heat exchange cylinder (1), an end of the air inlet hood (2) away from the heat exchange cylinder (1) is connected to an air expansion hood (4), an end of the air expansion hood (4) away from the heat exchange cylinder (1) is connected to an air inlet pipe (5), an air outlet hood (3) is fixedly mounted on the other end of the heat exchange cylinder (1), an end of the air outlet hood (3) away from the heat exchange cylinder (1) is connected to an air outlet pipe (8), one side of the top of the heat exchange cylinder (1) is connected to a water inlet pipe (6), and one side of the bottom of the heat exchange cylinder (1) is connected to a water outlet pipe (7), a heat exchange component is mounted inside the heat exchange cylinder (1), and a drive component is mounted inside the air outlet hood (3); The heat exchange assembly comprises thirteen cavity plates (10), and both ends of the thirteen cavity plates (10) are connected to air guide pipes (9).

2. A chemical industry waste gas waste heat recovery device according to claim 1, characterized in that: The air guide pipes (9) at both ends of the cavity plate (10) are rotatably mounted inside the air inlet hood (2) and the air outlet hood (3), respectively.

3. A chemical industry waste gas waste heat recovery device according to claim 2, characterized in that: The driving assembly comprises an exhaust pipe 3 (14), eight exhaust pipe 2s (12) and four exhaust pipe 1s (11); a driving gear (15) is fixedly mounted on the outer side of the exhaust pipe 3 (14); a driven gear (13) is fixedly mounted on the outer sides of the eight exhaust pipe 2s (12); a rotating column (17) is fixedly mounted on one end of the exhaust pipe 3 (14); a rotating fan (23) is fixedly mounted on the end of the rotating column (17) away from the exhaust pipe 3 (14); and the driving gear (15) meshes with the other four driven gears (13) through the four driven gears (13).

4. A chemical industry waste gas waste heat recovery device according to claim 3, characterized in that: A partition (22) is fixedly mounted inside the gas outlet hood (3); an exhaust port (16) is provided on the outside of the exhaust pipe 3 (14); the exhaust pipe 1 (11), the exhaust pipe 2 (12) and the exhaust port (16) are all located between the partition (22) and a side wall of the gas outlet hood (3) close to one end of the heat exchange cylinder (1); the rotating column (17) is rotatably mounted inside the partition (22); and a connecting groove (19) is provided inside the partition (22).

5. A chemical industry waste gas waste heat recovery device according to claim 4, characterized in that: A protective frame (18) is fixedly mounted on one side of the partition (22), the rotating fan (23) is located on the inner side of the protective frame (18), and the side of the protective frame (18) away from the partition (22) is fixedly connected to the inner wall of the air outlet hood (3) away from the heat exchange cylinder (1).

6. A chemical industry waste gas waste heat recovery device according to claim 5, characterized in that: Two oblique air guide baffles (20) are fixedly mounted on one side of the partition (22) on which the protective frame (18) is mounted, and the two oblique air guide baffles (20) are located on both sides of the connecting groove (19); two straight air guide baffles (21) are fixedly mounted on one side of the partition (22) on which the protective frame (18) is mounted, and the two straight air guide baffles (21) are located on both sides of the connection between the air outlet pipe (8) and the air outlet cover (3).

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