A shell and tube heat exchanger and waste heat recovery system

Abstract

The present invention provides a shell and tube heat exchanger and a waste heat recovery system, which relate to the technical field of heat exchangers, including an incinerator. The waste heat recovery system includes an incinerator, two heat exchangers are arranged side by side on one side of the incinerator, and a preheating box is provided at the other end of the heat exchanger. The top of the preheating box is connected to the heat exchanger, and the top, bottom and both ends of the heat exchanger are provided with a switching component. The switching component includes a first connecting pipe and a second connecting pipe. The first connecting pipe is arranged at the top and bottom of the heat exchanger. Compared with the existing technology, the two groups of heat exchangers are used alternately to increase the heat exchange time, so that the heat exchange is more sufficient. The heat exchanger directly sends out a primary heat source, and the exhausted hot air is subjected to a secondary heat exchange through the preheating box. The gases exchanged twice are mixed together through the driving component and sent into the incinerator to maintain the temperature in the incinerator, reduce energy loss, improve the efficiency of heat exchange, and make it more sufficient.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to a shell-and-tube heat exchanger and a waste heat recovery system. Background Art

[0002] The shell-and-tube heat exchanger is the most widely used type of heat exchanger in chemical and alcohol production. It primarily consists of a shell, tubesheet, heat exchange tubes, header, and baffles. Materials available include ordinary carbon steel, copper, or stainless steel. During heat exchange, one fluid enters through the header's connecting pipe, flows through the tube, and exits through the outlet pipe at the other end of the header. This is known as the tube side. Another fluid enters through a connecting pipe on the shell and exits through another connecting pipe on the shell. This is known as the shell side.

[0003] Heat exchangers are primarily used for heat exchange and heat recovery. For example, hot steam from an incinerator is fed into a heat exchanger and, after coming into contact with newly introduced cold air or water, can be used for residential purposes. However, in common heat exchanger structures, due to the rapid flow of the fluid, some heat from the heat source is sent out before being fully exchanged. This results in a significant amount of heat being wasted and cannot be effectively recycled. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a shell and tube heat exchanger and a waste heat recovery system to solve the problems raised in the above background technology. The present invention has a novel structure. The two groups of heat exchangers are used alternately to increase the heat exchange time, making the heat exchange more sufficient. The heat exchanger directly sends out a primary heat source, and the exhausted hot air is subjected to a secondary heat exchange through a preheating box. The gases exchanged twice are mixed together through a driving component and sent into the incinerator to maintain the temperature inside the incinerator, reduce energy loss, and improve the efficiency of heat exchange to make it more sufficient.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a waste heat recovery system, including an incinerator, the waste heat recovery system includes an incinerator, two heat exchangers are arranged side by side on one side of the incinerator, and a preheating box is arranged at the other end of the heat exchanger, the top of the preheating box is connected to the heat exchanger, the top, bottom and both ends of the heat exchanger are provided with a switching component, the switching component includes a first connecting pipe and a second connecting pipe, the first connecting pipe is arranged at the top and bottom of the heat exchanger, and a pipe opening is arranged in the middle position of the first connecting pipe, the heat exchanger The first connecting pipe at the lower end is fixedly connected to the pre-storage box, one end of the pre-storage box is provided with a delivery pipe, and the other end of the pre-storage box is fixed with a delivery pipe, the other end of the delivery pipe is installed with a driving assembly, the driving assembly includes a mixing tube, one end of the mixing tube is fixed with an air supply pipe, and the air supply pipe is connected to the combustion chamber of the incinerator, a long tube is fixed on the top of the preheating box, and the other end of the long tube is fixedly connected to the mixing tube, piston rods are slidably inserted into the interior of the first connecting tube and the second connecting tube, and connecting assemblies are provided on the outside of the first connecting tube and the second connecting tube.

[0006] Furthermore, a hollow tube is rotatably installed inside the preheating box through a bearing, the top of the hollow tube is rotatably connected to the pipe mouth of the second connecting tube at the outlet end of the heat exchanger, a plurality of annular tubes are equidistantly fixed on the surface of the hollow tube, and the interior of the annular tube is connected to the hollow tube, and an air inlet pipe is opened on one side of the bottom of the preheating box.

[0007] Furthermore, the drive assembly also includes a transmission belt, and the transmission belt is rotatably installed on the top of the preheating box through a mounting plate. A pulley on one side of the transmission belt is fixedly sleeved on the top of the hollow tube, and a first bevel gear is fixed to the bottom of the pulley at the other end of the transmission belt, and a second bevel gear is meshed and connected to one side of the bottom of the first bevel gear.

[0008] Furthermore, a gear ring frame is rotatably installed on the surface of the mixing tube through an axle ring, and a stirring frame is fixed on the gear ring frame at the axis center inside the mixing tube. A transmission rod is fixed on the rear end of the gear ring frame, and the transmission rod rotates out of the mixing tube and is fixedly connected to the second bevel gear.

[0009] Furthermore, a motor is fixed to the bottom of the mixing tube located outside the gear ring frame, and a driving gear is fixed to the output end of the motor, and the driving gear is meshed and connected to the gear ring frame.

[0010] Furthermore, the connecting assembly includes an insert rod, which is fixed on the same side of the piston column inside the first connecting tube and the second connecting tube, and the insert rod slides out of the first connecting tube and the second connecting tube, and the two insert rods at the inlet end and the top of the heat exchanger and the two insert rods at the outlet end and the bottom of the heat exchanger are respectively fixed with connecting plates.

[0011] Furthermore, ring ropes are fixed at both ends of the piston column of the first connecting pipe at the upper end of the heat exchanger, and both ends of the ring rope pass through the first connecting pipe. Guide blocks are fixed at both ends of the first connecting pipe corresponding to the positions where the ring rope passes through, and the ring rope slides through the guide blocks.

[0012] Furthermore, a connecting frame is fixed on the outside of the ring rope, and the bottom of the other end of the connecting frame is fixedly connected to the connecting plate connecting the outlet end and the bottom of the heat exchanger. An electric push rod is fixed on the outer wall of the first connecting pipe at the lower end of the heat exchanger, and the extended end of the electric push rod is fixedly connected to the connecting plate.

[0013] Furthermore, a connecting pipe is passed through the top of the preheating box, the other end of the connecting pipe is fixedly connected to the exhaust gas treatment box, and the connecting pipe is rotatably connected to the bottom of the hollow tube through a bearing.

[0014] A shell-and-tube heat exchanger, wherein a plurality of heat exchange tubes are arranged equidistantly inside the heat exchanger, horizontal tubes are fixed at both ends of the heat exchanger, and the horizontal tubes are fixed on the surface of a second connecting tube, the heat exchange tubes are fixedly connected to the horizontal tubes, vertical tubes are fixed at the top and bottom of the heat exchanger, and the vertical tubes are fixedly connected to the surface of the first connecting tube, a plurality of partitions are fixed equidistantly inside the heat exchanger, and the heat exchange tubes slide through the partitions, and adjacent partitions are staggered up and down.

[0015] Beneficial effects of the present invention:

[0016] The present invention drives the connecting plate at the lower end to move outward by the electric push rod, and the connecting plate pulls the first connecting pipe at the outlet end of the heat exchanger and the plug rod inside the second connecting pipe at the lower end to move, driving the piston column to move, closing the outlet end of one side of the heat exchanger, and suspending the discharge of high-temperature exhaust gas and air. At this time, the top vertical pipe and the horizontal pipe at the inlet end of the heat exchanger are opened, and air and high-temperature gas can be fed into the interior. The first connecting pipe around the upper end of the heat exchanger is driven by the connecting frame to rotate, driving the internal piston column to move. Because the piston column of the first connecting pipe at the upper end of the heat exchanger and the second connecting pipe at the inlet end are fixedly connected by the plug rod and the connecting plate, the movement direction is opposite to that of the piston column at the lower end. The opening states of the two sets of heat exchangers are opposite, and one set of outlet ends is closed, giving air and high-temperature exhaust gas time to contact and exchange heat, while the other set of inlet ends is closed, and the exhaust gas and air that have been exchanged are discharged. The two do not affect each other, which can shorten the waiting time of the individual heat exchangers for heat exchange and improve the efficiency of the overall heat exchange.

[0017] The present invention drives the driving gear to rotate by a motor and engages with the gear ring frame to drive the stirring frame to rotate. One side of the mixing tube receives the primary heat exchange air sent from the pre-storage box, and the tail end receives the secondary heat exchange air sent from the preheating box. After the twice exchanged air is evenly mixed by the stirring frame, it is sent into the combustion chamber of the incinerator. The air has a certain temperature, which can reduce energy consumption.

[0018] The present invention drives the transmission rod to rotate through the driving gear, the first bevel gear is engaged with the second bevel gear, and then the hollow tube and the annular tube rotate through the transmission of the transmission belt. The exhaust gas sent out from the heat exchanger still has a certain temperature, and the air is sucked in through the intake pipe and undergoes secondary heat exchange with the exhaust gas inside the annular tube and the hollow tube. The rotation of the hollow tube and the annular tube drives the air flow, making the heat exchange more uniform and efficient. Finally, the exhaust gas is sent to the exhaust gas treatment box for final treatment.

[0019] Compared with the prior art, the present invention uses two sets of heat exchangers alternately to increase the heat exchange time, making the heat exchange more sufficient. The heat exchanger directly sends out the primary heat source, and the exhausted hot air is subjected to secondary heat exchange through the preheating box. The gases exchanged twice are mixed together through the driving component and sent into the incinerator, thereby maintaining the temperature inside the incinerator, reducing energy loss, and improving the efficiency of heat exchange, making it more sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the system flow of a shell and tube heat exchanger and waste heat recovery system of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of a shell-and-tube heat exchanger and waste heat recovery system of the present invention;

[0022] Figure 3 This is a schematic diagram of the connections between various units of a shell-and-tube heat exchanger and a waste heat recovery system according to the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of a heat exchanger and a preheating box of a shell-and-tube heat exchanger and a waste heat recovery system of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection between the first bevel gear and the second bevel gear of a shell and tube heat exchanger and a waste heat recovery system of the present invention;

[0025] Figure 6 This is a schematic diagram of the internal structure of a mixing box of a shell-and-tube heat exchanger and a waste heat recovery system of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of a drive assembly of a shell-and-tube heat exchanger and a waste heat recovery system according to the present invention;

[0027] Figure 8 This is a schematic diagram of the internal structure of the first connecting pipe and the second connecting pipe of a shell and tube heat exchanger and a waste heat recovery system of the present invention.

[0028] In the figure: 1. incinerator; 2. heat exchanger; 21. heat exchange tube; 22. partition; 23. vertical tube; 24. horizontal tube; 3. preheating box; 31. air inlet pipe; 32. hollow tube; 33. annular tube; 4. exhaust gas treatment box; 41. connecting pipe; 5. switching assembly; 51. first connecting pipe; 52. second connecting pipe; 53. piston column; 54. plug rod; 55. connecting plate; 56. ring rope; 57. guide block; 58. connecting frame; 59. electric push rod; 6. connecting assembly; 7. drive assembly; 71. air supply pipe; 72. transmission belt; 73. first bevel gear; 74. second bevel gear; 75. transmission rod; 76. mixing tube; 77. gear ring frame; 78. stirring frame; 79. motor; 710. drive gear; 711. long tube; 8. pre-storage box; 81. delivery pipe; 82. delivery pipe. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] See also Figures 1 to 8The present invention provides a technical solution: a waste heat recovery system, including an incinerator 1, the waste heat recovery system includes an incinerator 1, two heat exchangers 2 are arranged side by side on one side of the incinerator 1, and a preheating box 3 is arranged at the other end of the heat exchanger 2, the top of the preheating box 3 is connected to the heat exchanger 2, the top, bottom and both ends of the heat exchanger 2 are provided with a switching component 5, the switching component 5 includes a first connecting pipe 51 and a second connecting pipe 52, the first connecting pipe 51 is arranged at the top and bottom of the heat exchanger 2, and a pipe mouth is provided in the middle position of the first connecting pipe 51, the pipe mouth of the first connecting pipe 51 at the lower end of the heat exchanger 2 is fixedly connected to a pre-storage box 8, one end of the pre-storage box 8 is provided with a delivery pipe 81, and the other end of the pre-storage box 8 is fixed with a delivery pipe 82, the other end of the delivery pipe 82 is installed with a driving component 7, the driving component 7 includes a mixing pipe 76, one end of the mixing pipe 76 is fixed with an air supply Tube 71, and the air supply pipe 71 is connected to the combustion chamber of the incinerator 1, a long tube 711 is fixed on the top of the preheating box 3, and the other end of the long tube 711 is fixedly connected to the mixing pipe 76, the interiors of the first communicating pipe 51 and the second communicating pipe 52 are slidably plugged with piston rods 53, and the outer sides of the first communicating pipe 51 and the second communicating pipe 52 are provided with a connecting component 6. When the device is used, the high-temperature exhaust gas generated by the incineration of the incinerator 1 is alternately sent into the two heat exchangers 2 through the switching component 5 at the inlet end, and the air is introduced through the vertical pipe 23 of the heat exchanger 2 and heat exchange is carried out inside the heat exchanger 2. The heat-exchanged air is sent to the pre-storage box 8, and the exhaust gas is sent to the interior of the preheating box 3 for secondary heat exchange with the new air. The twice exchanged air is mixed inside the mixing pipe 76 and then sent to the interior of the incinerator 1 to maintain the temperature in the incineration room and reduce energy consumption. In this device, the gas flow inside all pipelines is driven by a fan.

[0031] In this embodiment, a hollow tube 32 is rotatably mounted inside the preheating box 3 through a bearing. The top of the hollow tube 32 is rotatably connected to the mouth of the second connecting tube 52 at the outlet end of the heat exchanger 2. A plurality of annular tubes 33 are fixed on the surface of the hollow tube 32 at equal intervals, and the interior of the annular tube 33 is connected to the hollow tube 32. An air inlet pipe 31 is provided on one side of the bottom of the preheating box 3. A connecting pipe 41 is passed through the top of the preheating box 3. The other end of the connecting pipe 41 is fixedly connected to the exhaust gas treatment box 4. The connecting pipe 41 is connected to the bottom of the hollow tube 32 through The bearings are connected in rotation, the driving gear 710 drives the transmission rod 75 to rotate, the first bevel gear 73 is engaged with the second bevel gear 74, and then the transmission is transmitted by the transmission belt 72, the hollow tube 32 and the annular tube 33 rotate, and the exhaust gas sent out from the heat exchanger 2 still has a certain temperature. The air is inhaled through the air intake pipe 31 and undergoes secondary heat exchange with the exhaust gas inside the annular tube 33 and the hollow tube 32. The rotation of the hollow tube 32 and the annular tube 33 drives the air flow, making the heat exchange more uniform and efficient. Finally, the exhaust gas is sent to the exhaust gas treatment box 4 for final treatment.

[0032] In this embodiment, the driving assembly 7 also includes a transmission belt 72. The top of the preheating box 3 is rotatably mounted with a transmission belt 72 through a mounting plate. A pulley on one side of the transmission belt 72 is fixedly sleeved on the top of the hollow tube 32, and a first bevel gear 73 is fixed to the bottom of the pulley at the other end of the transmission belt 72. A second bevel gear 74 is meshed and connected to one side of the bottom of the first bevel gear 73. A gear ring frame 77 is rotatably mounted on the surface of the mixing tube 76 through a shaft ring. A stirring frame 78 is fixed to the gear ring frame 77 at the internal axis of the mixing tube 76. A transmission rod 75 is fixed to the rear end of the gear ring frame 77, and the transmission rod 75 rotates to pass through the mixing tube 76. 6 is fixedly connected to the second bevel gear 74. A motor 79 is fixed to the bottom of the mixing tube 76 outside the gear ring frame 77, and a driving gear 710 is fixed to the output end of the motor 79. The driving gear 710 is meshed with the gear ring frame 77. The motor 79 drives the driving gear 710 to rotate and meshes with the gear ring frame 77 to drive the stirring frame 78 to rotate. One side of the mixing tube 76 receives the primary heat exchange air sent from the pre-storage box 8, and the tail end receives the secondary heat exchange air sent from the preheating box 3. The twice exchanged air is evenly mixed through the stirring frame 78 and finally sent to the combustion chamber of the incinerator 1. The air has a certain temperature to reduce energy consumption.

[0033] In this embodiment, the connecting assembly 6 includes an insert rod 54, and an insert rod 54 is fixed on the same side of the piston column 53 inside the first connecting pipe 51 and the second connecting pipe 52, and the insert rod 54 slides out of the first connecting pipe 51 and the second connecting pipe 52. The two insert rods 54 at the inlet end and the top of the heat exchanger 2 and the two insert rods 54 at the outlet end and the bottom of the heat exchanger 2 are respectively fixed with connecting plates 55. The piston column 53 of the first connecting pipe 51 at the upper end of the heat exchanger 2 is fixed with a ring rope 56 at both ends, and the two ends of the ring rope 56 are passed through The first connecting pipe 51 is provided with a guide block 57 fixed at both ends of the first connecting pipe 51 corresponding to the position where the ring rope 56 passes through, and the ring rope 56 slides through the guide block 57. A connecting frame 58 is fixed to the outside of the ring rope 56. The bottom of the other end of the connecting frame 58 is fixedly connected to the connecting plate 55 connected to the outlet end and the bottom of the heat exchanger 2. An electric push rod 59 is fixed on the outer wall of the first connecting pipe 51 at the lower end of the heat exchanger 2, and the extended end of the electric push rod 59 is fixedly connected to the connecting plate 55. The electric push rod 59 drives the lower end of the heat exchanger 2 to move. When the connecting plate 55 at the end moves outward, the connecting plate 55 pulls the first connecting pipe 51 at the outlet end of the heat exchanger 2 and the plug rod 54 inside the second connecting pipe 52 at the lower end to move, driving the piston column 53 to move, closing the outlet end of the heat exchanger 2 on one side, and suspending the delivery of high-temperature exhaust gas and air. At this time, the top vertical pipe 23 and the inlet horizontal pipe 24 of the heat exchanger 2 are opened, and air and high-temperature gas can be sent into the interior. The first connecting pipe 51 around the upper end of the heat exchanger 2 is driven to rotate by the connecting frame 58, driving the internal piston column 53 to move. Because the piston column 53 of the first connecting pipe 51 at the upper end of the heat exchanger 2 and the second connecting pipe 52 at the inlet end are fixedly connected by the insert rod 54 and the connecting plate 55, the movement direction will be opposite to the movement direction of the piston column 53 at the lower end. The opening states of the two groups of heat exchangers 2 are opposite. The outlet end of one group is closed to give the air and high-temperature exhaust gas time to contact and exchange heat, and the inlet end of the other group is closed to send out the exhaust gas and air that have been exchanged. The two do not affect each other, which can shorten the time for a single heat exchanger 2 to wait for heat exchange and improve the efficiency of the overall heat exchange.

[0034] A shell and tube heat exchanger, wherein a plurality of heat exchange tubes 21 are arranged equidistantly inside the heat exchanger 2, a horizontal tube 24 is fixed at both ends of the heat exchanger 2, and the horizontal tube 24 is fixed on the surface of the second connecting tube 52, the heat exchange tube 21 is fixedly connected to the horizontal tube 24, the top and bottom of the heat exchanger 2 are fixed with vertical tubes 23, the vertical tube 23 is fixedly connected to the surface of the first connecting tube 51, a plurality of partitions 22 are fixed equidistantly inside the heat exchanger 2, and the heat exchange tube 21 slides through the partition 22, and the adjacent partitions 22 are staggered up and down. The operating principle of the heat exchanger 2 is the same as that of the prior art. The high-temperature exhaust gas sent from the inlet end of the heat exchanger 2 by the incinerator 1 is transported through the heat exchange tube 21, and air is sent into the heat exchanger 2 through the vertical tube 23 at the top of the heat exchanger 2. The air exchanges heat with the high-temperature exhaust gas, and finally the exhaust gas is discharged from the heat exchanger 2 is sent out from the horizontal pipe 24 at the outlet end, and the air after heat exchange is sent into the pre-storage box 8 from the bottom vertical pipe 23. Part of the pre-storage box 8 can be directly used for residential life or industrial use, and the other part is sent into the mixing pipe 76 through the delivery pipe 82. After mixing with the air of the secondary heat exchange, it is sent into the incinerator 1 together to maintain the temperature inside the incinerator 1. Two groups of heat exchangers 2 are provided in this solution, and the structures of the two groups of heat exchangers 2 are the same. Parts of the horizontal pipe 24 and the vertical pipe 23 are fixedly connected to the first connecting pipe 51 and the second connecting pipe 52 respectively. By moving the piston column 53, one group can be opened and the other group closed. The opened group is used for the input or output of high-temperature exhaust gas and air, and the closed group gives the high-temperature exhaust gas and air time for heat exchange, so that the air contacts the heat exchange pipe 21 more thoroughly.

[0035] When the device is in use, the high-temperature exhaust gas sent into the inlet end of the heat exchanger 2 from the incinerator 1 is transported through the heat exchange pipe 21, and air is sent into the interior of the heat exchanger 2 through the vertical pipe 23 at the top of the heat exchanger 2. The air exchanges heat with the high-temperature exhaust gas, and finally the exhaust gas is sent out from the horizontal pipe 24 at the outlet end of the heat exchanger 2, and the air after heat exchange is sent into the pre-storage box 8 from the bottom vertical pipe 23. Part of the pre-storage box 8 can be directly used for residential life or industrial use, and the other part is sent into the mixing pipe 76 through the delivery pipe 82. After mixing with the air of the secondary heat exchange, it is sent into the incinerator 1 together to maintain the temperature inside the incinerator 1. Two groups of heat exchangers 2 are provided in this scheme, and the structures of the two groups of heat exchangers 2 are the same. Parts of the horizontal pipe 24 and the vertical pipe 23 are connected to the first connecting pipe 51 and the first connecting pipe 51 respectively. The two connecting pipes 52 are fixedly connected, and through the movement of the piston column 53, one group can be opened and the other closed. The opened group is used for the introduction or discharge of high-temperature exhaust gas and air, and the closed group gives the high-temperature exhaust gas and air time for heat exchange, so that the air contacts the heat exchange tube 21 more thoroughly. When the electric push rod 59 drives the connecting plate 55 at the lower end to move outward, the connecting plate 55 pulls the first connecting pipe 51 at the outlet end of the heat exchanger 2 and the plug 54 inside the second connecting pipe 52 at the lower end to move, driving the piston column 53 to move, closing the outlet end of the heat exchanger 2 on one side, and suspending the discharge of high-temperature exhaust gas and air. At this time, the top vertical pipe 23 and the inlet horizontal pipe 24 of the heat exchanger 2 are opened, and air and high-temperature gas can be fed into the interior, and the ring-shaped heat exchanger is driven by the connecting frame 58. 2. The first connecting pipe 51 at the upper end of the heat exchanger 2 rotates, driving the internal piston rod 53 to move. Because the piston rod 53 of the first connecting pipe 51 at the upper end and the second connecting pipe 52 at the inlet end of the heat exchanger 2 are fixedly connected by the plug rod 54 and the connecting plate 55, the direction of movement is opposite to that of the piston rod 53 at the lower end. The opening states of the two groups of heat exchangers 2 are opposite. The outlet end of one group is closed to give the air and high-temperature exhaust gas time to contact and exchange heat. The inlet end of the other group is closed to send out the exhaust gas and air that have been exchanged. The two do not affect each other, which can shorten the time for a single heat exchanger 2 to wait for heat exchange and improve the efficiency of the overall heat exchange. The motor 79 drives the driving gear 710 to rotate and engage with the gear ring frame 77 to drive the stirring frame 78 to rotate. One side of the mixing pipe 76 receives the primary heat exchange air sent from the pre-storage box 8. The tail end receives the secondary heat exchange air sent from the preheating box 3, mixes the twice exchanged air evenly through the stirring frame 78, and finally sends it to the combustion chamber of the incinerator 1. The air has a certain temperature to reduce energy consumption. The driving gear 710 drives the transmission rod 75 to rotate, and the first bevel gear 73 and the second bevel gear 74 are engaged and then driven by the transmission belt 72. The hollow tube 32 and the annular tube 33 rotate. The exhaust gas sent out from the heat exchanger 2 still has a certain temperature. The air is inhaled through the air inlet pipe 31 and undergoes secondary heat exchange with the exhaust gas inside the annular tube 33 and the hollow tube 32. The rotation of the hollow tube 32 and the annular tube 33 drives the air flow, making the heat exchange more uniform and efficient. Finally, the exhaust gas is sent to the exhaust gas treatment box 4 for final treatment.

[0036] The basic principles, main features and advantages of the present invention are shown and described above. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0037] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A waste heat recovery system, comprising an incinerator (1), characterized in that: The waste heat recovery system comprises an incinerator (1), two heat exchangers (2) are arranged side by side on one side of the incinerator (1), and a preheating box (3) is arranged at the other end of the heat exchanger (2), the top of the preheating box (3) is connected to the heat exchanger (2), and the top, bottom and both ends of the heat exchanger (2) are provided with a switching assembly (5), and the switching assembly (5) comprises a first connecting pipe (51) and a second connecting pipe (52), the first connecting pipe (51) is arranged at the top and bottom of the heat exchanger (2), and a pipe opening is arranged in the middle position of the first connecting pipe (51), and the pipe opening of the first connecting pipe (51) at the lower end of the heat exchanger (2) is fixedly connected to A pre-storage box (8), one end of the pre-storage box (8) is provided with a delivery pipe (81), and the other end of the pre-storage box (8) is fixed with a delivery pipe (82), the other end of the delivery pipe (82) is installed with a drive assembly (7), the drive assembly (7) includes a mixing tube (76), one end of the mixing tube (76) is fixed with an air supply pipe (71), and the air supply pipe (71) is communicated with the combustion chamber of the incinerator (1), a long tube (711) is fixed on the top of the preheating box (3), and the other end of the long tube (711) is fixedly connected to the mixing tube (76), and the interiors of the first connecting tube (51) and the second connecting tube (52) are both slidably connected with movable The piston rod (53) is fixed on the same side of the piston rod (53) inside the first communicating tube (51) and the second communicating tube (52), and the piston rod (54) is fixed on the same side of the piston rod (53) inside the first communicating tube (51) and the second communicating tube (52), and the piston rod (54) slides out of the first communicating tube (51) and the second communicating tube (52), and the two piston rods (54) at the inlet end and the top of the heat exchanger (2) and the two piston rods (54) at the outlet end and the bottom of the heat exchanger (2) are respectively fixed with connecting plates (55), and the piston rod (53) of the first communicating tube (51) at the upper end of the heat exchanger (2) is fixed on the 53) are fixed with ring ropes (56) at both ends, and both ends of the ring rope (56) pass through the first connecting pipe (51), and guide blocks (57) are fixed at both ends of the first connecting pipe (51) corresponding to the positions where the ring rope (56) passes through, and the ring rope (56) slides through the guide blocks (57), and a connecting frame (58) is fixed on the outside of the ring rope (56), and the bottom of the other end of the connecting frame (58) is fixedly connected to the connecting plate (55) connected to the outlet end and the bottom of the heat exchanger (2), and an electric push rod (59) is fixed on the outer wall of the first connecting pipe (51) at the lower end of the heat exchanger (2), and the extended end of the electric push rod (59) is fixedly connected to the connecting plate (55).

2. The waste heat recovery system according to claim 1, characterized in that: A hollow tube (32) is rotatably mounted inside the preheating box (3) via a bearing. The top of the hollow tube (32) is rotatably connected to the mouth of the second connecting tube (52) at the outlet end of the heat exchanger (2). A plurality of annular tubes (33) are fixed at equal intervals on the surface of the hollow tube (32), and the interiors of the annular tubes (33) are connected to the hollow tube (32). An air inlet pipe (31) is provided on one side of the bottom of the preheating box (3).

3. The waste heat recovery system according to claim 2, characterized in that: The driving assembly (7) further comprises a transmission belt (72), the transmission belt (72) being rotatably mounted on the top of the preheating box (3) via a mounting plate, a pulley on one side of the transmission belt (72) being fixedly sleeved on the top of the hollow tube (32), and a first bevel gear (73) being fixed to the bottom of the pulley at the other end of the transmission belt (72), and a second bevel gear (74) being meshedly connected to one side of the bottom of the first bevel gear (73).

4. The waste heat recovery system according to claim 3, characterized in that: A gear ring frame (77) is rotatably mounted on the surface of the mixing tube (76) via a shaft ring. A stirring frame (78) is fixed to the gear ring frame (77) at the axis center inside the mixing tube (76). A transmission rod (75) is fixed to the rear end of the gear ring frame (77). The transmission rod (75) rotates out of the mixing tube (76) and is fixedly connected to the second bevel gear (74).

5. The waste heat recovery system according to claim 4, characterized in that: A motor (79) is fixed to the bottom of the mixing tube (76) located outside the gear ring frame (77), and a driving gear (710) is fixed to the output end of the motor (79), and the driving gear (710) is meshed and connected with the gear ring frame (77).

6. The waste heat recovery system according to claim 2, characterized in that: A connecting pipe (41) extends from the top of the preheating box (3), the other end of the connecting pipe (41) is fixedly connected to the exhaust gas treatment box (4), and the connecting pipe (41) is rotatably connected to the bottom of the hollow tube (32) via a bearing.

Images