Reinforced temperature-resistant and pressure-resistant sleeve heat exchanger

Abstract

The utility model discloses a strengthened temperature-resistant pressure-resistant sleeve heat exchanger which comprises a heat exchanger body, a smoke inlet and a smoke outlet, the smoke inlet and the smoke outlet are formed in the two sides of the heat exchanger body, a radiation cylinder is arranged at the smoke inlet of the smoke inlet in the heat exchanger body, and a strengthening ring is arranged at the connecting position of the outer side wall of the radiation cylinder and used for strengthening pressure resistance and temperature resistance. The opposite sides of the smoke inlet and the radiation cylinder are fixedly connected together through the Mohr head, so that the welding amount at the joint can be reduced, the risk of weld crack at the high-temperature smoke inlet is reduced, and meanwhile, a gas flowing channel is formed between the inner side wall and the outer side wall of the radiation cylinder; the heat exchange efficiency of a gas medium in the channel is improved through the uneven curved surface, accurate control over the gas temperature before high-temperature gas reaches the heat exchange plate is enhanced in cooperation with the tubular heat exchange structure, the welding amount at the connector position is further reduced through the mole head, the thrust rod and the triangular plate, and the heat exchange efficiency is improved. And the conditions of stress tension cracking caused by high temperature and equipment damage caused by oxidation corrosion are reduced, and the follow-up equipment maintenance cost of customers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of incinerator preheating and recovery technology, specifically to a reinforced temperature and pressure resistant sleeve heat exchanger. Background Technology

[0002] Incineration, currently the mainstream method for treating industrial waste gas, works by oxidizing the organic components in the waste gas at high temperatures to produce CO2 and H2O, thereby removing them. The oxidation temperature is typically between 800℃ and 850℃, and can reach as high as 1100℃ when the waste gas concentration is high. Therefore, the waste gas after incineration still has significant potential for heat recovery and utilization. The flue gas in this type of furnace places extremely high demands on the design and manufacturing of heat exchange equipment, resulting in considerable damage to heat exchange equipment each year. The maintenance and replacement of this equipment represents a significant expense for enterprises.

[0003] Currently, for gas heat exchangers, the exhaust gas temperature of incinerators in some special industries is far higher than 800 degrees Celsius. Extreme operating conditions place higher demands on the radiant tube's resistance to high temperature and pressure, which traditional radiant tubes cannot meet. To handle industrial flue gas with a temperature of over 800 degrees Celsius, the temperature needs to be controlled below 750 degrees Celsius. Since the heat exchange plates inside the heat exchanger are not resistant to high temperature and pressure, the high-temperature flue gas directly convections with the heat exchange plates, making it difficult to control the target temperature after heat exchange. At the same time, it can also cause high-temperature stress cracking or high-temperature oxidation corrosion on the heat exchange plates or other internal structures of the heat exchanger, greatly reducing the service life of the equipment and increasing the user's equipment maintenance costs.

[0004] Therefore, a reinforced temperature and pressure resistant sleeve heat exchanger is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a reinforced temperature and pressure resistant sleeve heat exchanger to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a reinforced temperature and pressure resistant sleeve heat exchanger, comprising a heat exchanger body and a flue gas inlet and an exhaust gas outlet disposed on both sides thereof. A radiant tube is provided at the flue gas inlet of the heat exchanger body. The opposite sides of the flue gas inlet and the radiant tube are fixedly connected by a molar head, reducing the amount of welding at the connection and lowering the risk of weld cracking at the high-temperature flue gas inlet. A gas flow channel is formed between the inner and outer walls of the radiant tube. The inner wall of the channel is a curved surface with uneven surfaces to enhance the heat exchange area of ​​the gas. A heat exchange plate is connected to the exhaust end of the radiant tube. A heat exchange tube is provided on the left side of the flue gas inlet end of the heat exchange plate and fixed to the radiant tube. A thrust rod for maintaining stable operation is installed between the radiant tube and the heat exchange tube. Reinforcing rings are provided at key locations connected to the outer wall of the radiant tube. A screw for adjusting support is rotatably connected to the outer wall of a corresponding set of reinforcing rings.

[0007] Preferably, multiple triangular plates are evenly distributed around the inner and outer walls of the flue gas inlet. One side of each of the multiple triangular plates is fixedly installed inside the heat exchanger body. A threaded cylinder is threadedly connected to the rod wall of each set of screws. An mounting seat is installed on the opposite end of each set of threaded cylinders and fixed inside the heat exchanger body. A guide seat and a limiting seat are respectively connected to the outer wall of each set of reinforcing rings. Multiple guide seats are respectively inserted into the interior of the corresponding limiting seats.

[0008] Preferably, the input and output ends of the heat exchange tube are connected to a connecting pipe, the other end of the heat exchange tube is connected to the inside of the channel, and the exhaust end of the heat exchange plate is connected to the inside of the exhaust port.

[0009] Preferably, a pressure plate is installed on the outer wall of the heat exchange plate, and multiple reinforcing plates extend from the outer wall of the pressure plate and are fixed inside the heat exchanger body. The connection end of the radiant tube and the heat exchange plate is provided with a high-temperature sensor for monitoring whether the temperature after heat exchange meets the standard, so as to ensure stable operation of the equipment.

[0010] Preferably, the heat exchanger body includes an air inlet and an air outlet on both sides of its top. The heat exchange gas enters the heat exchange plate through the air inlet and enters the heat exchange tube through the connecting pipe connected to its output end for further heat exchange. Finally, it flows into the channel and is discharged from the air outlet, thus circulating.

[0011] Preferably, the inner wall of the heat exchanger body is provided with an insulation layer of materials such as rock wool and aluminum silicate fiber for heat preservation, so as to reduce the loss of internal heat.

[0012] Preferably, the channel is provided with a drain pipe inside, and the other end of the drain pipe extends to the outside of the heat exchanger body to drain rainwater during transportation, liquid generated during heat exchange, or cleaning fluid left over from maintenance and cleaning of the equipment. Multiple support seats for equipment support are installed on the outside of the heat exchanger body, and lifting lugs are installed on the top of the heat exchanger body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model can preheat and recover flue gas under extreme working conditions of over 800 degrees Celsius. The uneven curved surface increases the heat exchange efficiency of the gas medium inside the channel. Combined with the heat exchange tube structure, it further enhances the precise control of the gas temperature before the high-temperature gas reaches the heat exchange plate. Furthermore, the use of the molar head, thrust rod, and triangular plate further reduces the amount of welding at the interface, thereby reducing equipment damage caused by stress cracking and oxidation corrosion due to high temperature, reducing the customer's subsequent equipment maintenance costs, and increasing the company's benefits.

[0015] 2. This utility model, through the setting of reinforcing rings, screws, threaded cylinders, mounting bases, guide seats, and limiting seats, symmetrically sets reinforcing rings on the outer wall of the radiant cylinder, and installs adjustable screws on the outer wall of the reinforcing rings. It adopts a dynamic adjustment mechanism, which can adjust the cylinder wall support force in real time according to actual installation requirements or working conditions, significantly improving the support effect. At the same time, the synergistic effect of the reinforcing rings and screws enhances the overall pressure resistance of the radiant cylinder, effectively copes with the stress concentration problem under high temperature and high pressure environment, extends the service life of the equipment, and reduces maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0018] Figure 3 This is a top view cross-sectional structural diagram of the present invention;

[0019] Figure 4 This is a schematic diagram of the connection structure of the reinforcing ring, screw, and threaded cylinder of this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure between the smoke inlet, the molar head, and the radiant tube of this utility model.

[0021] In the diagram: 1. Heat exchanger body; 2. Air inlet; 3. Air outlet; 4. Flue gas outlet; 5. Flue gas inlet; 6. Radiant tube; 7. Channel; 8. Curved surface; 9. Mohr's head; 10. Thrust rod; 11. Triangular plate; 111. Connecting pipe; 12. Heat exchange tube; 13. Heat exchange plate; 14. Pressure plate; 15. Reinforcing plate; 16. Drain pipe; 17. Support seat; 18. Lifting lug; 19. Reinforcing ring; 20. Screw; 21. Threaded cylinder; 22. Mounting seat; 23. Guide seat; 24. Limiting seat. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: Please refer to Figure 1-5 This utility model provides a technical solution: a reinforced temperature and pressure resistant sleeve heat exchanger, including a heat exchanger body 1 and flue gas inlets 5 and exhaust outlets 4 on both sides thereof. High-temperature flue gas generated in the incinerator is discharged through the flue gas inlets 5 and discharged through the exhaust outlets 4. A radiant tube 6 is provided at the flue gas inlet 5 inside the heat exchanger body 1. The opposite sides of the flue gas inlet 5 and the radiant tube 6 are fixedly connected by a molar head 9. The molar head 9 is a stamped, one-piece, trumpet-shaped structure. The connection method of the molar head 9 can reduce the amount of welding at the connection, save time, and reduce the risk of weld cracking at the high-temperature flue gas inlet, thus improving the stability of the connection. At the same time, a gas flow channel 7 is formed between the inner and outer walls of the radiant tube 6. The inner wall of the channel 7 is an uneven curved surface 8, which enhances the heat exchange area of ​​the high-temperature gas and improves the heat exchange efficiency. The exhaust end of the radiant tube 6 is connected to a heat exchange plate 13. A heat exchange tube 12 is provided on the left side of the flue gas inlet end of the heat exchange plate 13 and fixed to the radiant tube 6. A thrust rod 10 is installed between the radiant tube 6 and the heat exchange tube 12 to maintain stable operation. This reduces equipment damage caused by stress cracking and oxidation corrosion due to high temperature, thus reducing the customer's subsequent equipment maintenance costs. Reinforcing rings 19 are provided at key parts that connect to the outer wall of the radiant tube 6. A screw 20 for adjusting the support is rotatably connected to the outer wall of a set of reinforcing rings 19. A dynamic adjustment mechanism is adopted here, which can adjust the support force of the tube wall in real time according to the actual installation requirements or working conditions, disperse the pressure on the tube wall, and significantly improve the support effect. At the same time, the synergistic effect of the reinforcing rings 19 and the screw enhances the overall pressure resistance of the radiant tube.

[0024] In this embodiment, multiple triangular plates 11 are evenly distributed around the inner and outer walls of the flue gas inlet 5. One side of each triangular plate 11 is fixedly installed inside the heat exchanger body 1. A threaded cylinder 21 is threadedly connected to the wall of a set of screws 20. A mounting seat 22 is installed on the opposite end of each set of threaded cylinders 21 and fixed inside the heat exchanger body 1. A guide seat 23 and a limiting seat 24 are respectively connected to the outer wall of a set of reinforcing rings 19. Multiple guide seats 23 are respectively inserted into the interior of the corresponding limiting seats 24. Rotating the screws 20 inside the threaded cylinders 21 pushes the reinforcing rings 19 to support the radiant cylinder 6. The guide seats 23 and limiting seats 24 facilitate actual installation and limit function.

[0025] In this embodiment, the input end of the heat exchange tube 12 and the output end of the heat exchange plate 13 are connected to a connecting pipe 111. The other end of the heat exchange tube 12 is connected to the inside of the channel 7, and the exhaust end of the heat exchange plate 13 is connected to the inside of the exhaust port 4.

[0026] A pressure plate 14 is installed on the outer wall of the heat exchange plate 13. Multiple reinforcing plates 15 extend from the outer wall of the pressure plate 14 and are fixed inside the heat exchanger body 1. Traditional heat exchangers can only guarantee 5-10 kPa. After the pressure plate 14 is reinforced with multiple reinforcing plates 15, the design pressure can be increased to a maximum of 30 kPa. The connection end between the radiant cylinder 6 and the heat exchange plate 13 is equipped with a high-temperature sensor for monitoring the gas temperature to ensure stable operation of the equipment. The high-temperature sensor can monitor in real time whether the high-temperature gas after heat exchange exceeds the temperature, preventing the gas after exceeding the temperature from contacting the heat exchange plate 13 and improving the service life of the heat exchange plate 13.

[0027] In this embodiment, the heat exchanger body 1 includes an air inlet 2 and an air outlet 3 disposed on both sides of its top. The heat exchange gas enters the heat exchange plate 13 through the air inlet 2 and enters the heat exchange tube 12 through the connecting pipe 111 connected to its output end for further heat exchange. Finally, it flows into the channel 7 and is discharged from the air outlet 3. This cycle continues. The inner wall of the heat exchanger body 1 is provided with an insulation layer for insulation materials such as rock wool and aluminum silicate fiber to reduce the loss of internal heat. The application of the heat exchange gas in heat exchange is mainly based on its own characteristics, including inertness, non-toxicity, non-flammability and other physicochemical properties.

[0028] In this embodiment, a drain pipe 16 is provided inside the channel 7, and the other end of the drain pipe 16 extends to the outside of the heat exchanger body 1. It is used to drain rainwater during transportation, liquid generated during heat exchange, or cleaning fluid left over from maintenance and cleaning of the equipment. Multiple support seats 17 for supporting the equipment are installed on the outside of the heat exchanger body 1. Lifting lugs 18 are installed opposite each other on the top of the heat exchanger body 1. The support seats 17 are used to support the equipment to separate from the ground, reducing the impact of the humid environment on the equipment. The lifting lugs 18 facilitate the transfer of the equipment.

[0029] The working principle is as follows: When using this utility model, the heat exchanger body 1 is first hoisted to the designated position using the lifting lug 18, and then placed stably using the support base 17 to ensure the stability of the equipment. The inlet 5 is connected to the incinerator exhaust pipe, and the exhaust port 4 is connected to the subsequent waste gas treatment equipment pipe. At the same time, the inlet 2 and outlet 3 are connected to the gas medium heat exchange system, as well as the connecting pipe 111 of the heat exchange tube 12. The sealing of each connection part is checked. Before operation, it is checked to ensure that the cold side gas flows in from the inlet 2. Then, the incinerator is turned on, allowing the high-temperature flue gas to flow from the inlet. 5. Entering the heat exchanger, the cold-side gas enters the channel 7 through the heat exchanger body 1. The high-temperature flue gas in the radiant tube 6 exchanges heat with the cold-side gas through the uneven curved surface 8 of the inner wall of the channel 7. Then, after further temperature control by the heat exchange tube 12, it enters the heat exchange plate 13. Finally, the cold-side gas after heat exchange is discharged from the outlet 3, and the flue gas after cooling to the specified temperature is discharged from the exhaust port 4. At the same time, before the radiant tube 6 is installed or before operation, the screw 20 is rotated to push the reinforcing ring 19 to increase the support force of the radiant tube 6 according to the requirements or actual working conditions, thereby improving the support effect.

[0030] A symmetrical reinforcing ring 19 is set on the outer wall of the radiant cylinder 6, and an adjustable screw 20 is installed on the outer wall of the reinforcing ring 19. The dynamic adjustment mechanism can adjust the cylinder wall support force in real time according to the actual installation requirements or working conditions. By rotating the screw 20 inside the threaded cylinder 21 and moving it to one side, the two reinforcing rings 19 on both sides are pushed to move relative to or opposite to each other. This effectively solves the stress concentration problem under high temperature and high pressure environment, extends the service life of the equipment and reduces maintenance costs.

[0031] During operation, regularly inspect the equipment through the inspection port to check for damage to components such as the Moore head 9, thrust rod 10, and triangular plate 11. Also check whether the pressure plate 14 and reinforcing plate 15 are normal. If any problems are found, repair or replace them in time to ensure stable operation of the equipment and reduce maintenance costs.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reinforced temperature and pressure resistant sleeve heat exchanger, comprising a heat exchanger main body (1) and a smoke inlet (5) and a smoke outlet (4) arranged on both sides of the heat exchanger main body (1), characterized in that: Radiant cylinder (6) is arranged at the smoke inlet of the heat exchanger body (1), the opposite side of the smoke inlet (5) and the radiant cylinder (6) are fixedly connected through the mole head (9), the inner side wall and the outer side wall of the radiant cylinder (6) form the channel (7) for gas flow, the inner side wall of the channel (7) is provided with a curved surface (8), the smoke outlet end of the radiant cylinder (6) is connected with the heat exchange plate (13), the left side of the smoke gas input end of the heat exchange plate (13) is provided with the heat exchange pipe (12) and is fixed on the radiant cylinder (6), the thrust rod (10) is arranged between the radiant cylinder (6) and the heat exchange pipe (12), the reinforcing ring (19) is arranged at the connecting position of the outer side wall of the radiant cylinder (6), and the screw rod (20) is connected to the outer side wall corresponding to a group of the reinforcing ring (19).

2. The reinforced temperature and pressure resistant double-pipe heat exchanger according to claim 1, characterized in that: The side wall of the smoke inlet (5) is provided with a plurality of triangular plates (11), one side of the triangular plate (11) is arranged in the heat exchanger body (1), the rod wall corresponding to a group of the screw rod (20) is screw-connected with the threaded cylinder (21), the opposite end corresponding to a group of the threaded cylinder (21) is provided with the mounting seat (22) and is fixed in the heat exchanger body (1), the outer side wall corresponding to a group of the reinforcing ring (19) is respectively connected with the guide seat (23) and the limiting seat (24) in opposite directions, and a plurality of the guide seats (23) are respectively inserted into the corresponding limiting seats (24).

3. The reinforced temperature and pressure resistant double-pipe heat exchanger according to claim 1, characterized in that: The input end of the heat exchange pipe (12) and the output end of the heat exchange plate (13) are connected with the connecting pipe (111), the other end of the heat exchange pipe (12) is connected with the channel (7), and the smoke outlet end of the heat exchange plate (13) is connected with the inside of the smoke outlet (4).

4. The reinforced temperature and pressure resistant double-pipe heat exchanger according to claim 3, characterized in that: The outer side wall of the heat exchange plate (13) is provided with the pressing plate (14), a plurality of reinforcing plate pieces (15) are extended from the outer side wall of the pressing plate (14) and are fixed in the heat exchanger body (1), and the connecting end of the radiant cylinder (6) and the heat exchange plate (13) is provided with the high-temperature sensor.

5. The reinforced temperature and pressure resistant double-pipe heat exchanger according to claim 3, characterized in that: The heat exchanger body (1) comprises the gas inlet (2) and the gas outlet (3) arranged on both sides of the top of the heat exchanger body (1), the heat exchange gas enters the heat exchange plate (13) through the gas inlet (2) and enters the heat exchange pipe (12) through the connecting pipe (111) connected with the output end, and then further exchanges heat, flows into the channel (7) and is discharged from the gas outlet (3).

6. The enhanced temperature and pressure containment sleeve heat exchanger of claim 5, wherein: The inner side wall of the heat exchanger body (1) is provided with a heat preservation layer.

7. The reinforced temperature and pressure resistant double pipe heat exchanger according to claim 1, characterized in that: The inside of the channel (7) is provided with the liquid discharge pipe (16), the other end of the liquid discharge pipe (16) extends to the outside of the heat exchanger body (1), a plurality of support seats (17) for equipment support are arranged on the outside of the heat exchanger body (1), and the top of the heat exchanger body (1) is provided with the lifting lug (18) in opposite directions.

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