Rotor type heat transfer body resistant to heat change and regenerative air preheater

Abstract

The invention discloses a heat-change-resistant rotor type heat transfer body and a regenerative air preheater, and relates to the technical field of air heating, the heat-change-resistant rotor type heat transfer body comprises a heat exchange cylinder and further comprises a rotor installed in the heat exchange cylinder; the rotor comprises a rotating shaft rotationally installed on the heat exchange cylinder and a rotating pipe fixedly installed on the rotating shaft, a plurality of T-shaped heat exchange pieces are fixedly installed on the rotating pipe, an expansion mechanism is installed between every two adjacent heat exchange pieces, and the upper end and the lower end of the interior of the heat exchange cylinder are each fixedly provided with two baffles matched with the heat exchange pieces. A plurality of air holes and smoke holes are formed in the upper side and the lower side of the heat exchange cylinder and used for air and smoke to pass through. The rotor type heat transfer body has the advantages that the rotor type heat transfer body has the function of resisting heat change, the heat exchange degree can be automatically adjusted according to the air outlet temperature, the heat exchange degree of the air preheater is controllable, and the air preheater has higher heat exchange efficiency and higher heat exchange precision.

Description

Technical Field

[0001] This invention relates to the field of air heating technology, and more particularly to a rotor-type heat transfer medium resistant to thermal fluctuations and a regenerative air preheater. Background Technology

[0002] A rotor preheater is a device that uses the principle of heat exchange to transfer heat from high-temperature flue gas to cold air. Its core is a large, cylindrical or compartmented sector-shaped rotor driven by a motor and rotating slowly. The rotor is densely packed with numerous heat storage elements. The preheater's outer shell is equipped with a sealing device that divides the internal space into a flue gas passage and an air passage. High-temperature flue gas enters the flue gas passage from the boiler's tail flue, transferring heat to the heat storage elements as it flows through them, and then exits after its temperature decreases. Cold air is sent into the air passage by a fan. As it flows through the heated heat storage elements, the elements release their stored heat to the air, raising the air temperature before it is sent into the furnace for combustion.

[0003] CN207214116U discloses a rotary air preheater with a heat transfer surface that can reduce fouling in the rotor compartment. It includes a rotor, one end of which is a hot end and the other end is a cold end. The hot end of the rotor is provided with a flue gas inlet, a high-pressure primary air outlet and a low-pressure secondary air outlet. The cold end of the rotor is provided with a flue gas outlet, a high-pressure primary air inlet and a low-pressure secondary air inlet. The flue gas outlet and the flue gas inlet are connected by a flue gas passage passing through the rotor axially. The high-pressure primary air inlet and the high-pressure primary air outlet are connected by a high-pressure primary air passage passing through the rotor axially. The low-pressure secondary air inlet and the low-pressure secondary air outlet are connected by a low-pressure secondary air passage passing through the rotor axially.

[0004] When the above-mentioned rotary air preheater with heat transfer surface that can reduce fouling in the rotor compartment is in use, its rotor rotates under the drive of the motor. Flue gas with a large amount of heat enters the flue gas passage through the flue gas inlet at the hot end of the rotor, heating the heat transfer elements that rotate through each compartment in the flue gas passage, causing the temperature of the heat transfer elements to rise rapidly. Then the flue gas leaves the flue gas passage through the flue gas outlet at the cold end of the rotor. When the heated heat transfer elements rotate into the low-pressure secondary air passage and the high-pressure primary air passage, the air entering the low-pressure secondary air passage through the low-pressure secondary air inlet 7 at the cold end of the rotor and the air entering the high-pressure primary air passage through the high-pressure primary air inlet 7 at the cold end of the rotor will be heated by the heat transfer elements, thereby transferring the heat in the flue gas to the air passing through the low-pressure secondary air passage and the high-pressure primary air passage. The air in the circulating air duct and circulating air pipe can circulate under the drive of the fan. That is, the air in the circulating air duct and circulating air pipe is delivered by the fan to the side leakage air circulating cold port 12 and enters the circulating air duct. It then flows to the side leakage air circulating hot port. During this process, the hot air flowing out of the side leakage air circulating hot port will enter the circulating air duct from the side leakage air circulating cold port through the circulating air pipe, heating each compartment on the rotating rotor that passes through the circulating air duct and the heat transfer elements located in the compartment. This allows the temperature of the cold end of the rotor that is about to rotate into the flue gas duct to be advanced. When the rotor rises and enters the flue gas passage, the high temperature at the cold end of the rotor prevents condensable substances in the flue gas from condensing onto the inner wall of the chamber and the heat transfer elements located inside the chamber. In addition, the high-speed circulating hot airflow passing through the circulating air passage blows away any dust and dirt that may be present on the inner wall of the chamber and the heat transfer elements located inside the chamber, preventing dust and dirt from accumulating on their surfaces. Therefore, this application can improve the heat exchange efficiency and service life of the equipment, avoid energy waste, reduce the number of manual cleaning operations, and reduce the labor intensity of workers.

[0005] However, the rotors in the aforementioned and existing rotor preheaters are fixed, and the contact area between the cold air and the rotor is fixed. Once the temperature of the hot air in the rotor heat exchange chamber changes, this will cause thermal fluctuations in the cold air, resulting in fluctuations in the outlet air temperature, and will have a certain impact on the rotor.

[0006] Therefore, a novel rotor-type heat transfer medium resistant to thermal fluctuations and a regenerative air preheater can be used to address the shortcomings of existing technologies. Summary of the Invention

[0007] The purpose of this invention is to solve the problems existing in the prior art by proposing a rotor-type heat transfer medium and a regenerative air preheater that is resistant to thermal fluctuations.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A rotor-type heat transfer medium resistant to thermal fluctuations includes a heat exchange cylinder and a rotor installed inside the heat exchange cylinder. The rotor includes a rotating shaft rotatably mounted on a heat exchange cylinder and a rotating tube fixedly mounted on the rotating shaft. Multiple T-shaped heat exchange plates are fixedly mounted on the rotating tube along its axial direction. An expansion mechanism is installed between two adjacent heat exchange plates. Two baffles that cooperate with the heat exchange plates are fixedly installed at both the upper and lower ends inside the heat exchange cylinder. The heat exchange cylinder has multiple air holes and flue gas holes on both the upper and lower sides for air and flue gas to pass through.

[0009] Preferably, the number of heat exchange plates is eighteen, the spacing between two adjacent heat exchange plates is twenty degrees, and the curvature of each baffle is forty degrees.

[0010] Preferably, the expansion mechanism includes a fixed plate fixedly installed between two adjacent heat exchange fins. Multiple telescopic rods are fixedly installed on the fixed plate, and the telescopic ends of the multiple telescopic rods are jointly fixedly installed on an I-shaped expansion plate. Two first U-shaped expansion plates are slidably installed on opposite sides of the I-shaped expansion plate. A second U-shaped expansion plate is slidably installed on each of the two first U-shaped expansion plates. An expansion box is slidably installed on each of the two second U-shaped expansion plates. Multiple return springs are fixedly installed between the I-shaped expansion plate and the first U-shaped expansion plate, between the first U-shaped expansion plate and the second U-shaped expansion plate, and between the second U-shaped expansion plate and the expansion box. The two expansion boxes are slidably connected to the corresponding heat exchange fins via sliding grooves and sliding blocks. A through hole is provided in the middle of the expansion box, and a sealing plate that mates with the through hole is fixedly installed at one end of the I-shaped expansion plate. An adjustment structure that mates with the I-shaped expansion plate is installed on the fixed plate.

[0011] Preferably, a plurality of deflector plates are fixedly installed on the expansion box, and each deflector plate is located inside a through hole.

[0012] Preferably, the adjustment structure includes a rotating rod rotatably mounted on a fixed plate, the rotating rod being connected to an I-beam extension plate via a lead screw, the rotating rod penetrating and extending into the interior of a rotating tube, and a transmission component cooperating with the rotating rod being mounted on the rotating tube.

[0013] Preferably, the transmission component includes an electric actuator, and a transmission part is installed at the telescopic end of the electric actuator. The transmission part consists of two sets of wedge-shaped rubber rings, and a wedge-shaped rubber disc that cooperates with the two sets of rubber rings is fixedly installed on the rotating rod. The wedge-shaped rubber disc is located between the two sets of rubber rings.

[0014] A regenerative air preheater includes the aforementioned heat transfer rotor resistant to thermal fluctuations, a stabilizer, an insulation cover, and a heating cylinder installed inside the insulation cover. It also includes a partition fixedly installed on the insulation cover. The electric push rod is fixedly connected to the partition. Rollers are rotatably installed at the bottom of the insulation cover, and the stabilizer is used to limit the movement of the rollers. The partition divides the space above the heat exchange cylinder into a flue gas chamber and an air inlet chamber. A flue gas pipe and an air inlet pipe are fixedly installed on the partition. The flue gas pipe is connected to the flue gas chamber, and the air inlet pipe is connected to the air inlet chamber. The heating cylinder is divided into a smoke inlet chamber and an air outlet chamber. The smoke inlet chamber is connected to a smoke inlet pipe, and the air outlet chamber is connected to an air outlet pipe. A machine cover is fixedly installed at the bottom of the heat insulation cover, and a motor is fixedly installed inside the machine cover. The motor drive end is fixedly connected to the rotating shaft.

[0015] Preferably, a plurality of porous heat exchange plates are fixedly installed inside the heating cylinder, and each of the porous heat exchange plates penetrates both the flue gas inlet chamber and the exhaust gas outlet chamber.

[0016] Preferably, a disturbance mechanism is installed in each of the multiple air holes at the upper end of the heat exchange cylinder and the multiple smoke holes at the lower end of the heat exchange cylinder. The disturbance mechanism consists of a venturi tube bundle and guide vanes.

[0017] Preferably, the heat exchange cylinder has a plurality of first air guide holes at its upper end that match the corresponding air holes, and the venturi tube bundle has a second air guide hole in its middle section that communicates with the first air guide holes.

[0018] Compared with existing technologies, the advantages of this invention are: 1. When preheating air, this regenerative air preheater increases the flow velocity of flue gas and air by setting up venturi tube bundles, and changes the flow direction of flue gas and air by using guide vanes, thereby increasing the turbulence of flue gas and air, improving molecular motion, and thus effectively improving heat exchange efficiency.

[0019] 2. When preheating air, this regenerative air preheater uses a porous heat exchange plate to reheat the air after heat exchange, reducing the temperature difference between the air and the flue gas to an economically reasonable range. This can reduce equipment investment and operating energy consumption while ensuring heat exchange effect, and improve the overall economic efficiency of the system.

[0020] 3. When this rotor-type heat transfer body is exchanging heat, it changes the contact area between the flue gas and air and the heat exchange plates by setting an extension mechanism. It can adjust the degree of heat exchange according to the temperature of the air after heat exchange, and has the advantage of resisting thermal fluctuations to a certain extent, which can reduce the probability of the heat exchange plates deforming due to thermal fluctuations.

[0021] 4. When this rotor-type heat transfer body is performing heat exchange, by setting turbulence fins in the expansion box of the expansion mechanism, it can improve the heat exchange efficiency while causing the flue gas and air flowing through the through holes of the expansion box to generate turbulence, destroy the fluid flow boundary layer, enhance fluid mixing and heat transfer area utilization, thereby significantly improving the heat exchange efficiency. Attached Figure Description

[0022] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a rotor-type heat transfer body resistant to thermal fluctuations proposed in this invention. Figure 2 for Figure 1 Detailed schematic diagram of the structure after rotation at a certain angle; Figure 3 for Figure 2 Detailed schematic diagram of the structure after removing the stabilizer; Figure 4 for Figure 3 Detailed schematic diagram of the structure after removing the machine cover and the motor inside the machine cover; Figure 5 for Figure 4 Detailed schematic diagram of the structure after rotation at a certain angle; Figure 6 for Figure 4 Detailed schematic diagram of the structure of the heat insulation cover after it has been cut open and rotated at a certain angle; Figure 7 for Figure 6 Detailed schematic diagram of the structure after removing the insulation cover and partition; Figure 8 for Figure 7 Detailed schematic diagram of the structure of the intermediate heating cylinder and heat exchange cylinder after being cut open; Figure 9 for Figure 8 A detailed enlarged structural diagram showing the structure after removing the heating cylinder, flue pipe, exhaust pipe, and perforated heat exchange plate and rotating it at a certain angle. Figure 10 for Figure 9 Detailed schematic diagram of the structure after removing the electric actuator and heat exchange cylinder and rotating it by a certain angle; Figure 11 for Figure 10 Enlarged structural schematic diagram of the disturbance mechanism; Figure 12 for Figure 10 Detailed schematic diagram of the structure after removing multiple disturbance mechanisms; Figure 13 for Figure 12 Detailed schematic diagram of the structure after removing the baffle; Figure 14 for Figure 13 Detailed schematic diagram of the planar structure along one of the angles; Figure 15 for Figure 13 The diagram shows a detailed structural schematic of one of the heat exchange fins, one set of expansion mechanisms, and the adjustment structure. Figure 16 for Figure 15 Detailed schematic diagram of the structure after removing the rotating shaft, rotating tube and heat exchanger; Figure 17 for Figure 16 Detailed schematic diagram of the structure after rotation at a certain angle; Figure 18 for Figure 17 Detailed top-view plan view of the extended mechanism; Figure 19 for Figure 18 Detailed schematic diagram of the structure after the sealing plate is removed; Figure 20 for Figure 17 Detailed schematic diagram of the enlarged structure of the expansion box; Figure 21 for Figure 20 Detailed schematic diagram of the structure after the expansion box is cut open; Figure 22 for Figure 21 Detailed schematic diagram of the enlarged structure of the central spoiler.

[0023] In the diagram: 1. Stabilizer; 2. Roller; 3. Machine cover; 4. Insulation cover; 5. Baffle; 6. Exhaust pipe; 7. Inlet pipe; 8. Electric actuator; 9. Exhaust pipe; 10. Inlet pipe; 11. Heating cylinder; 12. Rotating shaft; 13. Heat exchange cylinder; 14. Perforated heat exchange plate; 15. Rotor; 16. Air vent; 17. First air guide hole; 18. Disturbance mechanism; 19. Baffle; 20. Venturi tube bundle; 21. Guide vane; 22. Second... 23. Air vent; 24. Heat exchange fin; 25. Rotating tube; 26. Expansion mechanism; 27. Adjustment structure; 28. Fixing plate; 29. ​​Telescopic rod; 30. Lead screw; 31. Rotating rod; 32. Transmission component; 33. Wedge-shaped rubber disc; 34. Expansion box; 35. Sliding block; 36. I-shaped expansion plate; 37. First U-shaped expansion plate; 38. Second U-shaped expansion plate; 39. Sealing plate; 40. Turbidator; 51. Return spring. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1: Refer to Figures 9-22 A rotor-type heat transfer body resistant to thermal fluctuations includes a heat exchange cylinder 13 and a rotor 15 installed inside the heat exchange cylinder 13. The rotor 15 includes a rotating shaft 12 rotatably mounted on the heat exchange cylinder 13 and a rotating tube 24 fixedly mounted on the rotating shaft 12. Multiple T-shaped heat exchange plates 23 are fixedly mounted on the rotating tube 24 along its axial direction. An expansion mechanism 25 is installed between two adjacent heat exchange plates 23. Two baffles 19 that cooperate with the heat exchange plates 23 are fixedly installed at both the upper and lower ends inside the heat exchange cylinder 13. To prevent air leakage when the heat exchange plate 23 rotates, a sealing ring needs to be fixed around the heat exchange plate 23. The rotation of the heat exchange plate 23 will drive the sealing ring to rotate, and the sealing ring will be tightly attached to the inner wall of the heat exchange cylinder 13. In this way, there will be no air leakage between the flue gas and the air inside the heat exchange cylinder 13.

[0026] Multiple air holes 16 and flue holes are provided on both the upper and lower sides of the heat exchange cylinder 13 for air and flue gas to pass through. The air holes 16 and flue holes are symmetrically arranged. Flue gas passes through the flue holes and air passes through the air holes 16. Flue gas flows from bottom to top and air flows from top to bottom. Heat exchange occurs inside the heat exchange cylinder 13. The heat exchange plate 23 slowly rotates from the flue gas side to the air side. At this time, the heat exchange plate 23 carries a large amount of heat absorbed from the flue gas. As the air flows, the air will carry away the heat on the heat exchange plate 23. The heat exchange plate 23 that slowly rotates from the air side to the flue gas side has a lower temperature and will absorb heat from the flue gas side to raise its temperature.

[0027] There are eighteen heat exchange fins 23, the distance between two adjacent heat exchange fins 23 is twenty degrees, and the curvature of each baffle 19 is forty degrees. The purpose of setting up the baffle 19 is to block the gap between three adjacent heat exchange fins 23 at the junction of flue gas and air, so as to ensure that the flue gas or air entering the gap at the junction will not enter the air or flue gas side in reverse, thus preventing leakage. The number of baffles set here is determined according to the size of the heat exchange fins 23, and the curvature of the baffle 19 is also determined according to the size of the heat exchange fins 23.

[0028] The expansion mechanism 25 includes a fixed plate 27 fixedly installed between two adjacent heat exchange fins 23. Multiple telescopic rods 28 are fixedly installed on the fixed plate 27. An H-shaped expansion plate 35 is fixedly installed at the telescopic ends of the multiple telescopic rods 28. Two first U-shaped expansion plates 36 are slidably installed on opposite sides of the H-shaped expansion plate 35. A second U-shaped expansion plate 37 is slidably installed on each of the two first U-shaped expansion plates 36. An expansion box 33 is slidably installed on each of the two second U-shaped expansion plates 37. The H-shaped expansion plate 35 and... Multiple return springs 40 are fixedly installed between the first U-shaped expansion plates 36, between the first U-shaped expansion plate 36 and the second U-shaped expansion plate 37, and between the second U-shaped expansion plate 37 and the expansion box 33. The two expansion boxes 33 and the corresponding heat exchange plates 23 are slidably connected by sliding grooves and sliding blocks 34. The expansion box 33 has a through hole in the middle, and a sealing plate 38 that matches the through hole is fixedly installed at one end of the I-shaped expansion plate 35. An adjustment structure 26 that matches the I-shaped expansion plate 35 is installed on the fixing plate 27. Since the angle between two adjacent heat exchange plates 23 is 30 degrees and they are not parallel, under the elastic force of the return spring 40, the expansion box 33 will abut against the heat exchange plate 23. According to the force decomposition, the abutting force will be divided into a component force along the heat exchange plate 23. This component force will drive the expansion box 33 to move along the heat exchange plate 23 (sliding through the sliding block 34 and the sliding groove). Under the action of the return spring 40, the first U-shaped expansion plate 36 will extend from the H-shaped expansion plate 35, and the second U-shaped expansion plate 37 will extend from the first U-shaped expansion plate 36. At this time, the flue gas and air will increase the contact area with the expansion mechanism 25, thereby increasing the heat conduction and improving the heat conduction efficiency. When the expansion box 33 retracts into the first U-shaped expansion plate 36, the sealing plate 38 will block the through hole on the expansion box 33, so that smoke or air will not flow in the through hole.

[0029] Multiple baffles 39 are fixedly installed on the expansion box 33, and each baffle 39 is located inside the through hole; As the extension box 33 gradually extends, the through hole is gradually opened (the opening of the through hole gradually increases), and the flow rate of flue gas or air through the through hole gradually increases. When the flue gas or air passes through the inside of the through hole, it will drive the turbulence tamper 39 to generate non-fixed frequency vibration under the action of the airflow. This will form turbulence in the through hole, causing the boundary layer to separate and break, forming local eddies or turbulence, accelerating the renewal of the hot fluid in the boundary layer, and sending the high-temperature fluid directly to the vicinity of the wall, significantly reducing the thermal resistance.

[0030] The fluid flow state is determined by the Reynolds number (Re): in laminar flow, heat transfer is mainly by molecular diffusion, which is inefficient; in turbulent flow, the fluid mixes violently, and heat transfer is mainly by convection, which is several to tens of times more efficient than laminar flow. The surface of the turbulence deflector 39 is roughened, which can trigger the conversion from laminar to turbulent flow at a low Re, and can achieve a strong convective heat transfer effect even at low flow rates.

[0031] The adjustment structure 26 includes a rotating rod 30 rotatably mounted on a fixed plate 27. The rotating rod 30 is connected to the I-beam extension plate 35 via a screw rod 29. The rotating rod 30 passes through and extends into the rotating tube 24. A transmission component that cooperates with the rotating rod 30 is installed on the rotating tube 24. The transmission component includes an electric push rod 8, and a transmission component 31 is installed at the telescopic end of the electric push rod 8. The transmission component 31 consists of two sets of wedge-shaped rubber rings. A wedge-shaped rubber disc 32 that cooperates with the two sets of rubber rings is fixedly installed on the rotating rod 30. The wedge-shaped rubber disc 32 is located between the two sets of rubber rings. Because the extension box 33 is always in the extended state under the action of the return spring 40, but in order to adjust the contact area between the extension mechanism 25 and the flue gas or air, it is necessary to adjust the area of ​​the extension mechanism 25. Therefore, in addition to the forward movement under the elastic force of the return spring 40, it is also necessary to move in the opposite direction to achieve the adjustment purpose. The directional movement is controlled by the adjustment structure 26, and the specific operation is as follows: Initially, under the action of the adjustment structure 26, the extension mechanism 25 is in a semi-retracted state. If thermal fluctuations occur at this time, the heat exchange needs to be changed. The electric push rod 8 extends to drive the transmission component 31 to move up and down. When the rubber ring at the upper end of the transmission component 31 abuts against the wedge-shaped rubber disc 32, the wedge-shaped rubber disc 32 rotates around the rubber ring. Under the action of friction, the wedge-shaped rubber disc 32 will rotate around the axis of the rotating rod 30, thereby driving the rotating rod 30 to rotate. Similarly, if the rotating rod 30 needs to be reversed, the electric push rod 8 needs to retract to drive the rubber ring at the lower end of the transmission component 31 to abut against the wedge-shaped rubber disc 32. At this time, the wedge-shaped rubber disc 32 still rotates around the rubber ring in the same direction. Under the action of friction, the wedge-shaped rubber disc 32 will rotate around the axis of the rotating rod 30, thereby driving the rotating rod 30 to rotate. However, at this time, the rotation direction of the rotating rod 30 is opposite to that described above. This is how the forward and reverse rotation of the rotating rod 30 can be achieved. The lead screw assembly 29 consists of a lead screw, a threaded sleeve, and a push rod. The threaded sleeve rotates on the lead screw, and the push rod is fixed on the threaded sleeve. The other end of the push rod is fixed to the I-beam expansion plate 35. The lead screw is fixed to the rotating rod 30. The rotation of the rotating rod 30 will drive the lead screw to rotate, but the I-beam expansion plate 35 will not rotate, so the push rod and the threaded sleeve will not rotate. The rotation of the lead screw will drive the threaded sleeve to move on the lead screw. Under the action of the push rod, the I-beam expansion plate 35 will move, changing the position of the I-beam expansion plate 35. Due to the different positions, the spacing between two adjacent heat exchange fins 23 is different, so the expansion degree of the expansion mechanism 25 is different, thereby achieving the purpose of adjusting the expansion area.

[0032] Example 2: Refer to Figures 1-9 A regenerative air preheater includes the aforementioned heat transfer rotor resistant to thermal fluctuations, a stabilizer 1, an insulation cover 4, and a heating cylinder 11 installed inside the insulation cover 4. It also includes a partition 5 fixedly installed on the insulation cover 4, an electric push rod 8 fixedly connected to the partition 5, and a roller 2 rotatably installed at the bottom of the insulation cover 4. The stabilizer 1 is used to limit the roller 2. The partition 5 divides the space above the heat exchange cylinder 13 of the heat insulation cover 4 into a smoke outlet chamber and an air inlet chamber. A smoke outlet pipe 6 and an air inlet pipe 7 are fixedly installed on the partition 5. The smoke outlet pipe 6 is connected to the smoke outlet chamber, and the air inlet pipe 7 is connected to the air inlet chamber. The heating cylinder 11 is divided into a smoke inlet chamber and an air outlet chamber. The smoke inlet chamber is connected to a smoke inlet pipe 10, and the air outlet chamber is connected to an air outlet pipe 9. The bottom of the heat insulation cover 4 is fixedly installed with a cover 3. A motor is fixedly installed inside the cover 3, and the motor drive end is fixedly connected to the rotating shaft 12.

[0033] Flue gas is introduced through the flue gas inlet pipe 10, enters the flue gas inlet chamber, then enters the heat exchange cylinder 13 for heat exchange, and finally exits from the flue gas outlet chamber and the flue gas outlet pipe 6. The flue gas flows from bottom to top. Air enters through the air inlet pipe 7, then enters the air inlet chamber and enters the heat exchange cylinder 13 for heat exchange. After heat exchange, it enters the air outlet chamber and finally exits from the air outlet pipe 9. The air flows from top to bottom. Multiple perforated heat exchange plates 14 are fixedly installed inside the heating cylinder 11, and each perforated heat exchange plate 14 penetrates the flue gas inlet chamber and the exhaust gas chamber. Flue gas enters the inlet chamber and air enters the outlet chamber. They flow through the heating cylinder 11. At this time, under the action of the porous heat exchange plate 14, the heated air will absorb some of the heat from the flue gas that has not been heated, which can further heat the air and increase the heat exchange. Furthermore, it can reduce the temperature difference between air and flue gas to an economically reasonable range, thereby reducing equipment investment and operating energy consumption while ensuring heat exchange efficiency and improving the overall economic efficiency of the system.

[0034] A disturbance mechanism 18 is installed in multiple air holes 16 located at the upper end of the heat exchange cylinder 13 and multiple smoke holes located at the lower end of the heat exchange cylinder 13. The disturbance mechanism 18 consists of a venturi tube bundle 20 and a guide vane 21; The heat exchange cylinder 13 has a number of first air guide holes 17 that match the corresponding air holes 16 at its upper end, and the venturi tube bundle 20 has a second air guide hole 22 that communicates with the first air guide holes 17 in its middle section. As flue gas or air enters the corresponding vent 16 and flue, it passes through the Venturi tube bundle 20. Under the action of the Venturi tube bundle 20, the flue gas and air are accelerated, the molecular motion is accelerated, and the heat exchange efficiency is effectively improved. Meanwhile, on one side of the airflow channel (referring to the airflow passage, including the air inlet pipe 7, air inlet chamber, air outlet pipe 9, air outlet chamber, etc.), the airflow rate is the highest in the middle section of the Venturi tube bundle 20. This will generate negative pressure in the first air guide hole 17 and the second air guide hole 22, drawing out the heat in the heat exchange cylinder 13 through the first air guide hole 17 and the second air guide hole 22 to preheat the air in the Venturi tube bundle 20. Preheating has the effect of promoting resistance to thermal changes.

[0035] The specific operating steps of this device are as follows: Flue gas is introduced through the flue gas inlet pipe 10, enters the flue gas inlet chamber, then enters the heat exchange cylinder 13 for heat exchange, and finally exits from the flue gas outlet chamber and the flue gas outlet pipe 6. The flue gas flows from bottom to top. Air enters through the air inlet pipe 7, then enters the air inlet chamber and enters the heat exchange cylinder 13 for heat exchange. After heat exchange, it enters the air outlet chamber and finally exits from the air outlet pipe 9. The air flows from top to bottom. After the flue gas and air enter the heat exchange cylinder 13, the motor is started. The motor rotates and drives the rotating shaft 12 to rotate. The rotating shaft 12 rotates and drives the rotating tube 24 and the heat exchange plate 23 to rotate. The heat exchange plate 23 will rotate from the flue gas side to the air side. The air will absorb the heat on the heat exchange plate 23 to achieve the purpose of heat exchange. If the air or flue gas temperature changes at this time, in order to reduce the impact of thermal fluctuations on heat exchanger 23, the heat exchange capacity needs to be changed, as follows: The electric actuator 8 extends to drive the transmission component 31 to move up and down. When the rubber ring at the upper end of the transmission component 31 abuts against the wedge-shaped rubber disc 32, the wedge-shaped rubber disc 32 rotates around the rubber ring. Under the action of friction, the wedge-shaped rubber disc 32 will rotate around the axis of the rotating rod 30, thereby driving the rotating rod 30 to rotate. The rotation of the rotating rod 30 will drive the lead screw to rotate, while the I-beam expansion plate 35 will not rotate, so the push rod and the threaded sleeve will not rotate. The rotation of the lead screw will drive the threaded sleeve to move on the lead screw, and under the action of the push rod, it will drive the I-beam expansion plate 35 to move, changing the position of the I-beam expansion plate 35. Due to the different positions, the distance between two adjacent heat exchange plates 23 is different, so the expansion degree of the expansion mechanism 25 is different, thereby achieving the purpose of adjusting the expansion area. As the extension box 33 gradually extends, the through hole is gradually opened (the opening of the through hole gradually increases), and the flow rate of flue gas or air through the through hole gradually increases. When the flue gas or air passes through the inside of the through hole, it will drive the turbulence tumbler 39 to vibrate at a non-fixed frequency under the action of the airflow. This will form turbulence in the through hole, causing the boundary layer to separate and break, forming local eddies or turbulence, accelerating the renewal of the hot fluid in the boundary layer, and sending the high-temperature fluid directly to the vicinity of the wall, significantly reducing the thermal resistance and increasing the heat exchange. Conversely, it will reduce the heat exchange.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A heat variable resistance rotor type heat transfer body comprising a heat exchange cylinder (13), characterized in that, It also includes the rotor (15) installed inside the heat exchange cylinder (13); The rotor (15) includes a rotating shaft (12) rotatably installed on the heat exchange cylinder (13) and a rotating pipe (24) fixedly installed on the rotating shaft (12), a plurality of T-shaped heat exchange fins (23) are fixedly installed on the rotating pipe (24) along the axial direction thereof, an expansion mechanism (25) is installed between adjacent two heat exchange fins (23), and two baffles (19) cooperating with the heat exchange fins (23) are fixedly installed on the inside of the heat exchange cylinder (13) at the upper and lower ends thereof. A plurality of air holes (16) and smoke holes are formed on the upper and lower sides of the heat exchange cylinder (13) for air and flue gas to pass through.

2. The heat variable-resistant rotor type heat transmitting body according to claim 1, characterized by The number of the heat exchange fins (23) is eighteen, the distance between adjacent two heat exchange fins (23) is twenty degrees, and the arc of each baffle (19) is forty degrees.

3. The heat variable resistant rotor type heat transmitting body according to claim 2, wherein The expansion mechanism (25) includes a fixed plate (27) fixedly installed between adjacent two heat exchange fins (23), a plurality of telescopic rods (28) fixedly installed on the fixed plate (27), a I-shaped expansion plate (35) fixedly installed at the telescopic ends of the plurality of telescopic rods (28), two first U-shaped expansion plates (36) slidably installed on the opposite sides of the I-shaped expansion plate (35), a second U-shaped expansion plate (37) slidably installed on each of the two first U-shaped expansion plates (36), an expansion box (33) slidably installed on each of the two second U-shaped expansion plates (37), a plurality of reset springs (40) fixedly installed between the I-shaped expansion plate (35) and the first U-shaped expansion plate (36), the first U-shaped expansion plate (36) and the second U-shaped expansion plate (37), and the second U-shaped expansion plate (37) and the expansion box (33), the expansion box (33) is slidably connected with the corresponding heat exchange fin (23) through a sliding groove and a sliding block (34), a through hole is formed in the middle of the expansion box (33), one end of the I-shaped expansion plate (35) is fixedly installed with a blocking plate (38) matched with the through hole, and an adjusting structure (26) matched with the I-shaped expansion plate (35) is installed on the fixed plate (27).

4. The heat-resistant rotor type heat transfer body according to claim 3, wherein A plurality of turbulence paddles (39) are fixedly installed on the expansion box (33), and each turbulence paddle (39) is located inside the through hole.

5. The heat variable resistant rotor type heat transmitting body according to claim 4, wherein The adjusting structure (26) includes a rotating rod (30) rotatably installed on the fixed plate (27), the rotating rod (30) is connected with the I-shaped expansion plate (35) through a screw rod (29), the rotating rod (30) penetrates and extends into the inside of the rotating pipe (24), and a transmission member is installed on the rotating pipe (24) matched with the rotating rod (30).

6. The heat-resistant rotary heat transfer body according to claim 5, wherein The transmission member includes an electric push rod (8), a transmission part (31) is installed at the telescopic end of the electric push rod (8), the transmission part (31) is composed of two groups of wedge-shaped rubber rings, a wedge-shaped rubber disc (32) matched with the two groups of rubber rings is fixedly installed on the rotating rod (30), and the wedge-shaped rubber disc (32) is located between the two groups of rubber rings.

7. A regenerative air preheater comprising the heat resistant rotor type heat transfer body according to claim 6, further comprising a stabilizing frame (1), an insulation cover (4), and a heating cylinder (11) installed inside the insulation cover (4), characterized in that, It also includes fixedly installed in the heat shield (4) partition (5), the electric push rod (8) and partition (5) between fixed connection, heat shield (4) bottom rotatingly installed with the roller (2), the stabilizer frame (1) is used for limiting roller (2) to carry out; Partition (5) will heat shield (4) be located above heat exchange cylinder (13) space is divided into smoke cavity and air inlet cavity, partition (5) is fixedly installed with smoke outlet pipe (6) and air inlet pipe (7), smoke outlet pipe (6) is communicated with smoke cavity, air inlet pipe (7) is communicated with air inlet cavity; The heating cylinder (11) is divided into smoke cavity and air outlet cavity, the smoke cavity is communicated with the smoke pipe (10), the air outlet cavity is communicated with the air outlet pipe (9), the heat shield (4) bottom is fixedly installed with the machine cover (3), the machine cover (3) is fixedly installed with motor, the motor driving end is fixedly connected with rotating shaft (12).

8. The heat-resistant rotary heat transfer body according to claim 7, wherein The heating cylinder (11) is fixedly installed with a plurality of porous heat exchange plates (14) inside, each porous heat exchange plate (14) penetrates the smoke cavity and the air outlet cavity.

9. The heat-resistant rotor type heat transfer body according to claim 7, wherein A plurality of air holes (16) located on the upper end of the heat exchange cylinder (13) and a plurality of smoke holes located on the lower end of the heat exchange cylinder (13) are installed with disturbance mechanism (18); The disturbance mechanism (18) is composed of venturi tube bundle (20) and guide vane (21).

10. The heat-resistant rotary heat transfer body according to claim 9, wherein A plurality of first air guide holes (17) matched with corresponding air holes (16) are formed on the upper end of the heat exchange cylinder (13), and a second air guide hole (22) communicated with the first air guide hole (17) is formed in the middle of the venturi tube bundle (20).

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