Boiler deaerator waste heat recovery device for cigarette factory

Abstract

The invention discloses a boiler deaerator waste heat recovery device for a cigarette factory. The boiler deaerator waste heat recovery device comprises a shell, an air guide assembly, a first box body, a second box body, a drain tank, a heat exchange assembly and a plugging assembly. The first box body and the second box body are both located in the shell. The drain tank is located at the bottom outside the shell. The gas guide assembly comprises a first medium inlet pipe, a second medium inlet pipe, a medium discharge pipe and an exhaust pipe, the first medium inlet pipe is arranged at the top of the shell and penetrates through the shell to be communicated with the interior of the first box body, the second medium inlet pipe is arranged on one side of the shell, and the medium discharge pipe is arranged at the bottom of the shell; the first end of the exhaust pipe communicates with the interior of the second box body, and the two ends of the multiple heat exchange pipes communicate with the bottom of the first box body and the top of the second box body correspondingly. And the plugging assembly is arranged in the second box body. The time that flue gas is located in the heat exchange pipe can be prolonged conveniently, then the heating effect on demineralized water is improved, and waste of waste heat is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette machinery and equipment, and more particularly to a waste heat recovery device for a boiler deaerator in a cigarette factory. Background Art

[0002] Currently, deaerators commonly used in cigarette factories primarily remove dissolved oxygen from water, preventing equipment corrosion and ensuring normal operation of production equipment. Deaerators primarily consist of a deaerator tower and a deaerator water tank, as well as pipe connections and external components. The deaerator (deaerator tower) comprises the outer shell, a steam-water separator, a new type of rotary membrane (membrane-forming tube), a water grate, a heat storage filler, and a liquid-vapor network.

[0003] The waste heat of the exhaust gas discharged from the existing deaerator is recovered and utilized to preheat the desalted water, which can increase the operating temperature of the desalted water and reduce the energy consumed by the deaerator. However, the exhaust waste heat recovery of the boiler deaerator still has the following problems: when the flue gas enters the interior of the shell, it cannot stay well, causing the flue gas to be quickly discharged from the interior of the shell, resulting in the waste heat in the flue gas not being fully utilized, thereby causing waste heat to be wasted.

[0004] Therefore, how to provide a waste heat recovery device for a boiler deaerator in a cigarette factory has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] An object of the present invention is to provide a new technical solution for a waste heat recovery device of a boiler deaerator in a cigarette factory.

[0006] According to a first aspect of the present invention, there is provided a waste heat recovery device for a boiler deaerator in a cigarette factory, comprising: a housing, an air guide assembly, a first box, a second box, a drain box, a heat exchange assembly, and a plugging assembly;

[0007] The first box and the second box are both located inside the shell, and the first box is arranged at the top of the shell, the second box is arranged at the bottom of the shell, the drain box is located at the bottom outside the shell, and the drain box is communicated with the second box;

[0008] The air guide assembly includes a first medium inlet pipe, a second medium inlet pipe, a medium outlet pipe, and an exhaust pipe. The first medium inlet pipe is arranged at the top of the shell, passes through the shell and communicates with the interior of the first box. The second medium inlet pipe is arranged on one side of the shell, and the medium outlet pipe is arranged at the bottom of the shell. Both the second medium inlet pipe and the medium outlet pipe are in communication with the interior of the shell. A first end of the exhaust pipe is in communication with the interior of the second box, and both ends of the exhaust pipe pass through the shell and extend to the outside of the shell.

[0009] The heat exchange assembly includes a plurality of heat exchange tubes, and both ends of the plurality of heat exchange tubes are respectively connected to the bottom of the first box and the top of the second box;

[0010] The blocking component is arranged inside the second box body and is used to block or open the exhaust pipe.

[0011] Optionally, the heat exchange assembly also includes a motor, a connecting shaft and a first fan blade. The motor is arranged inside the second box body, the output end of the motor is connected to the first end of the connecting shaft, and the second end of the connecting shaft rotates through the second box body and the first box body and extends to the interior of the first box body and is connected to the first fan blade.

[0012] Optionally, a plurality of first connection holes are provided inside the first box body, and the plurality of heat exchange tubes are connected to the plurality of first connection holes.

[0013] Optionally, the heat exchange assembly further includes a bracket, a rotating shaft, a second fan blade, a connecting rod, a gear ring and a gear;

[0014] The first end of the bracket is arranged inside the first box body and is located on one side of the first connecting hole. The second end of the bracket is rotatably connected to the first end of the rotating shaft, and the gear is arranged between the bracket and the rotating shaft; the second end of the rotating shaft is connected to the second fan blade, and the second fan blade is located in the heat exchange tube. The first ends of the two connecting rods are respectively connected to the outer peripheral wall of the connecting shaft, and the second ends of the two connecting rods are connected to the inner wall of the gear ring, and the gear ring is meshed with the gear.

[0015] Optionally, a second connecting hole is provided on the second box body, and the exhaust pipe is connected to the second connecting hole;

[0016] The sealing assembly includes a fixed shaft and a sealing plate. The fixed shaft is arranged on one side of the second connecting hole and is connected to the second box body. The sealing plate is rotatably connected to the fixed shaft. The sealing plate covers the second connecting hole and is used to open or close the second connecting hole.

[0017] Optionally, the sealing assembly further includes a torsion spring and a limit plate, wherein the limit plate is arranged on the top of the fixed shaft, the torsion spring is sleeved on the fixed shaft, and both ends of the torsion spring are respectively connected to the sealing plate and the limit plate.

[0018] Optionally, the sealing assembly also includes a support plate, a rotating ring and a protrusion, the first ends of the two support plates are connected to the connecting shaft located inside the second box body, the second ends of the two support plates are connected to the inner wall of the rotating ring, the protrusion is arranged on the outer wall of the rotating ring, the fixed shaft is located outside the rotating ring, and the length of the protrusion is greater than the distance between the sealing plate and the rotating ring.

[0019] Optionally, a sealing ring is fixedly installed inside the heat exchange tube, a support frame is fixedly installed inside the heat exchange tube, a sliding rod is slidably connected to the inside of the support frame, a sealing plug is fixedly installed on the upper end of the sliding rod, and the sealing plug is located inside the sealing ring. A plurality of extrusion blocks are fixedly installed inside the rotating ring, and the sliding rod is inserted into the rotating ring and moves up and down under the action of the extrusion blocks.

[0020] Optionally, a tension spring is movably sleeved on the sliding rod, a first end of the tension spring is fixedly connected to the support frame, and a second end of the tension spring is fixedly connected to the surface of the sliding rod.

[0021] Optionally, the lower end of the sliding rod is slidably connected inside the rotating ring, and the shape of the extrusion block is triangular, so that the sliding rod can move up and down.

[0022] The beneficial effects of the present invention are:

[0023] (1) The waste heat recovery device of the boiler deaerator, when the rotating ring rotates, one end of the sliding rod will slide inside the rotating ring, and then one end of the sliding rod will slide on the inclined surface of the extrusion block, and then the sliding rod will slide inside the support frame, stretching the tension spring, and at the same time, the sealing plug will move upward, and the sealing plug will no longer seal the sealing ring. When the extrusion block no longer squeezes the sliding rod, the sealing plug and the sliding rod will be reset by the tension of the tension spring, and then the sealing plug will seal the sealing ring, and then the heat exchange tube will be sealed, so as to increase the time that the flue gas is located inside the heat exchange tube, thereby improving the effect of heating the desalted water and reducing the waste heat.

[0024] (2) The waste heat recovery device of the boiler deaerator causes the torsion spring to deform, so that the sealing plate no longer blocks the exhaust pipe. As the rotating ring continues to rotate, the protrusion will no longer squeeze the sealing plate, so that the sealing plate is reset by the torsion of the torsion spring, and the sealing plate seals one end of the exhaust pipe, thereby facilitating intermittent opening of the exhaust pipe, increasing the time that the flue gas stays in the heat exchange pipe and the second box, thereby improving the utilization of the heat in the flue gas, reducing the heat in the flue gas, maximizing the utilization rate of the heat in the flue gas, and improving the efficiency of waste heat recovery.

[0025] (3) The waste heat recovery device of the boiler deaerator drives the connecting rod to rotate when the connecting shaft rotates, and then the gear ring rotates. The gear ring drives the gear and the rotating shaft to rotate, and then the second fan blade rotates, blowing the flue gas into the interior of the heat exchange tube, thereby facilitating the rapid entry of the flue gas into the interior of the heat exchange tube, increasing the flow rate of the flue gas, and facilitating the utilization of the waste heat in the flue gas.

[0026] (4) The waste heat recovery device of the boiler deaerator connects one end of the first medium inlet pipe to the boiler deaerator exhaust pipe, and one end of the medium outlet pipe to the deaerator, so that the flue gas enters the interior of the first box through the first medium inlet pipe, enters the interior of the second box through multiple heat exchange pipes, and is discharged through the exhaust pipe. At the same time, the desalted water enters the shell through the second medium inlet pipe and exchanges heat with the waste gas in the heat exchange pipe. The desalted water is preheated and flows out through the medium outlet pipe, and then enters the deaerator through the medium outlet pipe. After the waste gas in the heat exchange pipe undergoes heat exchange, the water vapor therein is condensed into condensed water and enters the drain tank. The gas that cannot be condensed is discharged into the atmosphere through the exhaust pipe. The waste heat of the waste gas discharged from the deaerator can be recovered and used to preheat the desalted water, thereby increasing the operating temperature of the desalted water and reducing the energy consumed by the deaerator.

[0027] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0029] Figure 1 It is a structural schematic diagram of the waste heat recovery device of the boiler deaerator of the present invention;

[0030] Figure 2 is a schematic diagram of the interior of the housing of the present invention;

[0031] Figure 3 This is a schematic diagram of the interior of the first box of the present invention;

[0032] Figure 4 for Figure 3 A in the middle is an enlarged schematic diagram;

[0033] Figure 5 is a schematic diagram of the interior of the second box of the present invention;

[0034] Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle;

[0035] Figure 7 is a schematic diagram of a rotating ring of the present invention;

[0036] Figure 8 Schematic diagram of the interior of the heat exchange tube of the present invention.

[0037] The markings in the figure are as follows: 1. Outer casing; 2. Exhaust pipe; 3. First medium inlet pipe; 4. Drain tank; 5. Medium discharge pipe; 6. Second medium inlet pipe; 7. First box body; 8. Heat exchange tube; 9. Connecting shaft; 10. Second box body; 11. First fan blade; 12. Connecting rod; 13. Gear ring; 14. Bracket; 15. Rotating shaft; 16. Second fan blade; 17. Gear; 18. Motor; 19. Rotating ring; 20. Bump; 21. Support plate; 22. Fixed shaft; 23. Torsion spring; 24. Sealing plate; 25. Extrusion block; 26. Sliding rod; 27. Sealing plug; 28. Tension spring; 29. ​​Support frame; 30. Sealing ring. DETAILED DESCRIPTION

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0041] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0042] like Figures 1 to 8 As shown, an embodiment of the present invention provides a boiler deaerator waste heat recovery device for a cigarette factory according to the first aspect of the present invention, comprising: an outer shell 1, an air guide component, a first box body 7, a second box body 10, a drain box 4, a heat exchange component and a sealing component.

[0043] The first box body 7 and the second box body 10 are both located inside the shell 1, and the first box body 7 is arranged at the top of the shell 1, the second box body 10 is arranged at the bottom of the shell 1, the drain tank 4 is located at the bottom outside the shell 1, and the drain tank 4 is connected to the second box body 10.

[0044] The air guide assembly includes a first medium inlet pipe 3, a second medium inlet pipe 6, a medium discharge pipe 5 and an exhaust pipe 2. The first medium inlet pipe 3 is arranged at the top of the shell 1, and the first medium inlet pipe 3 passes through the shell 1 and is connected to the interior of the first box 7. The second medium inlet pipe 6 is arranged on one side of the shell 1, and the medium discharge pipe 5 is arranged at the bottom of the shell 1. The second medium inlet pipe 6 and the medium discharge pipe 5 are both connected to the interior of the shell 1. The first end of the exhaust pipe 2 is connected to the interior of the second box 10, and both ends of the exhaust pipe 2 pass through the shell 1 and extend to the outside of the shell 1.

[0045] The heat exchange assembly includes a plurality of heat exchange tubes 8, both ends of which are connected to the bottom of the first box 7 and the top of the second box 10. Specifically, the plurality of heat exchange tubes 8 are evenly spaced along the outer edges of the first box 7 and the second box 10.

[0046] The blocking component is arranged inside the second box body 10 and is used to block or open the exhaust pipe 2.

[0047] Specifically, the first end of the first medium inlet pipe 3 is connected to the boiler deaerator exhaust pipe, and the second end of the first medium inlet pipe 3 passes through the outer shell 1 and is communicated with the interior of the first box 7; the first end of the medium discharge pipe 5 is connected to the deaerator, and the second end of the medium discharge pipe 5 is communicated with the interior of the outer shell 1, so that the flue gas enters the interior of the first box 7 through the first medium inlet pipe 3, enters the interior of the second box 10 through multiple heat exchange pipes 8, and is then discharged through the exhaust pipe 2. At the same time, the desalted water enters the outer shell 1 through the second medium inlet pipe 6 and performs heat exchange with the residual gas in the heat exchange pipe 8. The desalted water is preheated and flows out through the medium discharge pipe 5.

[0048] Then, it enters the deaerator through the medium discharge pipe 5. After the residual gas in the heat exchange pipe 8 undergoes heat exchange, the water vapor therein is condensed into condensed water and enters the drain tank 4. The gas that cannot be condensed is discharged into the atmosphere through the exhaust pipe 2. The waste heat of the residual gas discharged from the deaerator can be recovered and utilized to preheat the desalted water, thereby increasing the operating temperature of the desalted water and reducing the energy consumed by the deaerator.

[0049] In one embodiment of the waste heat recovery device for a boiler deaerator in a cigarette factory of the present invention, Figure 3 and Figure 5 As shown, the heat exchange assembly also includes a motor 18, a connecting shaft 9 and a first fan blade 11. The motor 18 is arranged inside the second box body 10. The output end of the motor 18 is connected to the first end of the connecting shaft 9. The second end of the connecting shaft 9 rotates through the second box body 10 and the first box body 7 and extends to the interior of the first box body 7 and is connected to the first fan blade 11.

[0050] Specifically, when the motor 18 is started, the motor 18 can drive the connecting shaft 9 to rotate, thereby rotating the first fan blade 11, and then sucking the smoke inside the first medium entry tube 3 into the first box body 7, thereby accelerating the flow of the smoke and increasing the speed of the smoke flow.

[0051] In one embodiment of the waste heat recovery device of a boiler deaerator for a cigarette factory of the present invention, a plurality of first connecting holes are provided inside the first box body 7, and a plurality of heat exchange tubes 8 are connected to the plurality of first connecting holes, so that the flue gas in the first box body 7 is introduced into the heat exchange tubes 8, and then introduced into the second box body 10 through the heat exchange tubes 8.

[0052] Further, such as Figure 4 As shown, the heat exchange assembly further includes a bracket 14 , a rotating shaft 15 , a second fan blade 16 , a connecting rod 12 , a gear ring 13 and a gear 17 .

[0053] The first end of the bracket 14 is arranged inside the first box body 7 and is located on one side of the first connecting hole. The second end of the bracket 14 is rotatably connected to the first end of the rotating shaft 15, and the gear 17 is arranged between the bracket 14 and the rotating shaft 15; the second end of the rotating shaft 15 is connected to the second fan blade 16, and the second fan blade 16 is located in the heat exchange tube 8. The first ends of the two connecting rods 12 are respectively connected to the outer peripheral wall of the connecting shaft 9, and the second ends of the two connecting rods 12 are connected to the inner wall of the gear ring 13, and the gear ring 13 is meshed with the gear 17.

[0054] Specifically, there are multiple brackets 14, rotating shafts 15, second blades 16, connecting rods 12 and gears 17, and the number of brackets 14, rotating shafts 15, second blades 16, connecting rods 12 and gears 17 matches the number of first connecting holes.

[0055] When the motor 18 drives the connecting shaft 9 to rotate, the rotation of the connecting shaft 9 drives the connecting rod 12 to rotate, and then the gear ring 13 rotates. The gear ring 13 drives the gear 17 and the rotating shaft 15 to rotate, and then the second fan blade 16 rotates, blowing the flue gas into the interior of the heat exchange tube 8, thereby facilitating the rapid entry of the flue gas into the interior of the heat exchange tube 8, increasing the flow rate of the flue gas, and facilitating the utilization of the waste heat in the flue gas.

[0056] In one embodiment of the waste heat recovery device for a boiler deaerator in a cigarette factory of the present invention, Figure 5 and Figure 6 As shown, a second connecting hole is provided on the second box body 10, and the exhaust pipe 2 is communicated with the second connecting hole.

[0057] The blocking assembly includes a fixed shaft 22 and a sealing plate 24. The fixed shaft 22 is arranged on one side of the second connecting hole and is connected to the second box body 10. The sealing plate 24 is rotatably connected to the fixed shaft 22. The sealing plate 24 covers the second connecting hole and is used to open or close the second connecting hole.

[0058] Specifically, when the sealing plate 24 is opened, the exhaust pipe 2 is connected to the second box body 10 through the second connecting hole, thereby being able to discharge the smoke.

[0059] In one embodiment of the waste heat recovery device for a boiler deaerator in a cigarette factory of the present invention, Figure 6 As shown, the blocking assembly further includes a torsion spring 23 and a limit plate. The limit plate is arranged on the top of the fixed shaft 22. The torsion spring 23 is sleeved on the fixed shaft 22. The two ends of the torsion spring 23 are respectively connected to the sealing plate 24 and the limit plate.

[0060] The present invention sets a limit plate on the top of the fixed shaft 22, and a torsion spring 23 is sleeved on the fixed shaft 22. The two ends of the torsion spring 23 are respectively connected to the sealing plate 24 and the limit plate. Through the action of the torsion spring 23, the sealing plate 24 can automatically return to its position.

[0061] Furthermore, the sealing assembly also includes a support plate 21, a rotating ring 19 and a protrusion 20. The first ends of the two support plates 21 are connected to the connecting shaft 9 located inside the second box body 10, and the second ends of the two support plates 21 are connected to the inner wall of the rotating ring 19. The protrusion 20 is arranged on the outer wall of the rotating ring 19, and the fixed shaft 22 is located outside the rotating ring 19. The length of the protrusion 20 is greater than the distance between the sealing plate 24 and the rotating ring 19.

[0062] Specifically, when the motor 18 drives the connecting shaft 9 to rotate, the rotation of the connecting shaft 9 will drive the support plate 21 to rotate, causing the rotating ring 19 and the protrusion 20 to rotate, and then when the protrusion 20 contacts one end of the sealing plate 24, the protrusion 20 will squeeze one end of the sealing plate 24, causing the sealing plate 24 to rotate around the fixed shaft 22, so that the torsion spring 23 is deformed, and the sealing plate 24 no longer blocks the exhaust pipe 2. As the rotating ring 19 continues to rotate, the protrusion 20 will no longer squeeze the sealing plate 24, so that the sealing plate 24 is reset by the torsion of the torsion spring 23, and the sealing plate 24 is sealed to one end of the exhaust pipe 2, which is convenient for intermittently opening the exhaust pipe 2, increasing the time that the flue gas stays inside the heat exchange tube 8 and the second box 10, thereby improving the utilization of heat in the flue gas, reducing the heat in the flue gas, maximizing the utilization rate of heat in the flue gas, and improving the efficiency of waste heat recovery.

[0063] In one embodiment of the waste heat recovery device for a boiler deaerator in a cigarette factory of the present invention, Figure 7 and Figure 8 As shown, a sealing ring 30 is fixedly installed inside the heat exchange tube 8, a support frame 29 is fixedly installed inside the heat exchange tube 8, a sliding rod 26 is slidably connected inside the support frame 29, a sealing plug 27 is fixedly installed on the upper end of the sliding rod 26, and the sealing plug 27 is located inside the sealing ring 30, and a plurality of extrusion blocks 25 are fixedly installed inside the rotating ring 19. The sliding rod 26 is inserted into the rotating ring 19 and moves up and down under the action of the extrusion block 25.

[0064] Specifically, when the rotating ring 19 rotates, it drives the rotating ring 19 to rotate. At this time, the sliding rod 26 slides inside the rotating ring 19 and is squeezed by the extrusion block 25, causing the sliding rod 26 to move up and down, thereby driving the sealing plug 27 to move up and down, so that the sealing ring 30 can circulate the heat exchange tube 8 in a closed and open state, thereby increasing the time that the flue gas is located inside the heat exchange tube, thereby improving the effect of heating the desalted water and reducing the waste of waste heat.

[0065] Further, such as Figure 7 and Figure 8 As shown, a tension spring 28 is movably sleeved on the sliding rod 26 , a first end of the tension spring 28 is fixedly connected to the support frame 29 , and a second end of the tension spring 28 is fixedly connected to the surface of the sliding rod 26 .

[0066] The present invention fixedly connects the first end of the tension spring 28 to the support frame 29 and the second end of the tension spring 28 to the surface of the sliding rod 26, so that the sliding rod 26 can automatically return to its position under the action of the tension spring 28, so that the sealing ring 30 can quickly seal the heat exchange tube 8, thereby improving the efficiency of sealing the heat exchange tube.

[0067] Further, such as Figure 7 and Figure 8 As shown, the lower end of the sliding rod 26 is slidably connected inside the rotating ring 19, and the squeezing block 25 is in the shape of a triangle to enable the sliding rod 26 to move up and down.

[0068] When the rotating ring 19 rotates, one end of the sliding rod 26 will slide inside the rotating ring 19, and then one end of the sliding rod 26 will slide on the inclined surface of the extrusion block 25, and then the sliding rod 26 will slide inside the support frame 29, stretching the tension spring 28, and at the same time causing the sealing plug 27 to move upward, and the sealing plug 27 will no longer seal the sealing ring 30. When the extrusion block 25 no longer squeezes the sliding rod 26, the sealing plug 27 and the sliding rod 26 will be reset by the tension of the tension spring 28, and then the sealing plug 27 will seal the sealing ring 30, and then seal the heat exchange tube 8, thereby facilitating the increase of the time that the flue gas is located inside the heat exchange tube 8, thereby improving the effect of heating the desalted water and reducing the waste of waste heat.

[0069] The working principle of the waste heat recovery device of the boiler deaerator used in the cigarette factory of the present invention is as follows:

[0070] One end of the first medium inlet pipe 3 is connected to the boiler deaerator exhaust pipe, and one end of the medium discharge pipe 5 is connected to the deaerator, so that the flue gas enters the interior of the first box body 7 through the first medium inlet pipe 3, enters the interior of the second box body 10 through multiple heat exchange pipes 8, and is then discharged through the exhaust pipe 2. At the same time, the desalted water enters the shell 1 through the second medium inlet pipe 6 and exchanges heat with the residual gas in the heat exchange pipe 8. The desalted water is preheated and flows out through the medium discharge pipe 5, and then enters the deaerator through the medium discharge pipe 5. After the residual gas in the heat exchange pipe 8 undergoes heat exchange, the water vapor therein is condensed into condensed water and enters the drain tank 4, and the gas that cannot be condensed is discharged into the atmosphere through the exhaust pipe 2.

[0071] Next, the motor 18 is started, so that the motor 18 drives the connecting shaft 9 to rotate, and then the first fan blade 11 rotates, and then the flue gas inside the first medium inlet tube 3 is sucked into the interior of the first box body 7. When the connecting shaft 9 rotates, it drives the connecting rod 12 to rotate, and then the gear ring 13 rotates. The gear ring 13 drives the gear 17 and the rotating shaft 15 to rotate, and then the second fan blade 16 rotates, blowing the flue gas into the interior of the heat exchange tube 8, thereby facilitating the flue gas to quickly enter the interior of the heat exchange tube 8 and increase the flow rate of the flue gas.

[0072] When the connecting shaft 9 rotates, it will drive the support plate 21 to rotate, and then the rotating ring 19 and the protrusion 20 will rotate. When the protrusion 20 contacts one end of the sealing plate 24, the protrusion 20 will squeeze one end of the sealing plate 24, and then the sealing plate 24 will rotate around the fixed shaft 22, and then the torsion spring 23 will be deformed, and then the sealing plate 24 will no longer block the exhaust pipe 2. As the rotating ring 19 continues to rotate, the protrusion 20 will no longer squeeze the sealing plate 24, and then the sealing plate 24 will be reset by the torsion of the torsion spring 23, and then the sealing plate 24 will seal one end of the exhaust pipe 2, thereby facilitating intermittent opening of the exhaust pipe 2.

[0073] When the rotating ring 19 rotates, one end of the sliding rod 26 will slide inside the rotating ring 19, and then one end of the sliding rod 26 will slide on the inclined surface of the extrusion block 25, and then the sliding rod 26 will slide inside the support frame 29, stretching the tension spring 28, and at the same time the sealing plug 27 will move upward, and the sealing plug 27 will no longer seal the sealing ring 30. When the extrusion block 25 no longer squeezes the sliding rod 26, the sealing plug 27 and the sliding rod 26 will be reset by the tension of the tension spring 28, and then the sealing plug 27 will seal the sealing ring 30.

[0074] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A waste heat recovery device for a boiler deaerator in a cigarette factory, characterized in that: include: A housing (1), an air guide assembly, a first box body (7), a second box body (10), a drain box (4), a heat exchange assembly, and a plugging assembly; The first box (7) and the second box (10) are both located inside the shell (1), and the first box (7) is arranged at the top of the shell (1), and the second box (10) is arranged at the bottom of the shell (1), and the drain box (4) is located at the bottom outside the shell (1), and the drain box (4) is communicated with the second box (10); The air guide assembly comprises a first medium inlet pipe (3), a second medium inlet pipe (6), a medium outlet pipe (5) and an exhaust pipe (2), wherein the first medium inlet pipe (3) is arranged at the top of the shell (1), the first medium inlet pipe (3) passes through the shell (1) and is in communication with the interior of the first box (7), the second medium inlet pipe (6) is arranged on one side of the shell (1), the medium outlet pipe (5) is arranged at the bottom of the shell (1), and both the second medium inlet pipe (6) and the medium outlet pipe (5) are in communication with the interior of the shell (1), the first end of the exhaust pipe (2) is in communication with the interior of the second box (10), and both ends of the exhaust pipe (2) pass through the shell (1) and extend to the outside of the shell (1); The heat exchange assembly comprises a plurality of heat exchange tubes (8), and both ends of the plurality of heat exchange tubes (8) are respectively connected to the bottom of the first box (7) and the top of the second box (10); The blocking component is arranged inside the second box (10) and is used to block or open the exhaust pipe (2).

2. The waste heat recovery device for boiler deaerator in cigarette factory according to claim 1, characterized in that: The heat exchange assembly further comprises a motor (18), a connecting shaft (9) and a first fan blade (11); the motor (18) is arranged inside the second housing (10); the output end of the motor (18) is connected to the first end of the connecting shaft (9); the second end of the connecting shaft (9) rotates through the second housing (10) and the first housing (7) and extends to the interior of the first housing (7) to be connected to the first fan blade (11).

3. The waste heat recovery device for boiler deaerator in cigarette factory according to claim 2, characterized in that: A plurality of first connection holes are provided inside the first box (7), and the plurality of heat exchange tubes (8) are in communication with the plurality of first connection holes.

4. The waste heat recovery device for boiler deaerator in cigarette factory according to claim 3, characterized in that: The heat exchange assembly further includes a bracket (14), a rotating shaft (15), a second fan blade (16), a connecting rod (12), a gear ring (13) and a gear (17); The first end of the bracket (14) is arranged inside the first box (7) and is located on one side of the first connecting hole. The second end of the bracket (14) is rotatably connected to the first end of the rotating shaft (15), and the gear (17) is arranged between the bracket (14) and the rotating shaft (15); the second end of the rotating shaft (15) is connected to the second fan blade (16), and the second fan blade (16) is located in the heat exchange tube (8). The first ends of the two connecting rods (12) are respectively connected to the outer peripheral wall of the connecting shaft (9), and the second ends of the two connecting rods (12) are connected to the inner wall of the gear ring (13), and the gear ring (13) is meshed with the gear (17).

5. The waste heat recovery device for boiler deaerator in cigarette factory according to claim 2, characterized in that: The second box body (10) is provided with a second connecting hole, and the exhaust pipe (2) is in communication with the second connecting hole; The blocking assembly comprises a fixed shaft (22) and a sealing plate (24), wherein the fixed shaft (22) is arranged on one side of the second connecting hole and is connected to the second box body (10), and the sealing plate (24) is rotatably connected to the fixed shaft (22). The sealing plate (24) covers the second connecting hole and is used to open or close the second connecting hole.

6. The waste heat recovery device for boiler deaerator in cigarette factory according to claim 5, characterized in that: The blocking assembly further comprises a torsion spring (23) and a limit plate, wherein the limit plate is arranged on the top of the fixed shaft (22), the torsion spring (23) is sleeved on the fixed shaft (22), and the two ends of the torsion spring (23) are respectively connected to the sealing plate (24) and the limit plate.

7. The waste heat recovery device for boiler deaerator in cigarette factory according to claim 6, characterized in that: The blocking assembly further comprises a support plate (21), a rotating ring (19) and a protrusion (20), wherein the first ends of the two support plates (21) are connected to the connecting shaft (9) located inside the second box body (10), and the second ends of the two support plates (21) are connected to the inner wall of the rotating ring (19), the protrusion (20) is arranged on the outer wall of the rotating ring (19), the fixed shaft (22) is located outside the rotating ring (19), and the length of the protrusion (20) is greater than the distance between the sealing plate (24) and the rotating ring (19).

8. The waste heat recovery device for boiler deaerator in cigarette factory according to claim 7, characterized in that: A sealing ring (30) is fixedly installed inside the heat exchange tube (8), a support frame (29) is fixedly installed inside the heat exchange tube (8), a sliding rod (26) is slidably connected inside the support frame (29), a sealing plug (27) is fixedly installed on the upper end of the sliding rod (26), and the sealing plug (27) is located inside the sealing ring (30), and a plurality of extrusion blocks (25) are fixedly installed inside the rotating ring (19), and the sliding rod (26) is inserted into the rotating ring (19) and moves up and down under the action of the extrusion blocks (25).

9. The waste heat recovery device for boiler deaerator in cigarette factory according to claim 8, characterized in that: A tension spring (28) is movably sleeved on the sliding rod (26), a first end of the tension spring (28) is fixedly connected to the support frame (29), and a second end of the tension spring (28) is fixedly connected to the surface of the sliding rod (26).

10. The waste heat recovery device for boiler deaerator in cigarette factory according to claim 9, characterized in that: The lower end of the sliding rod (26) is slidably connected inside the rotating ring (19), and the shape of the extrusion block (25) is triangular, so that the sliding rod (26) can move up and down.

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