A hot water recirculation system for flue gas waste heat recovery

Abstract

The present application relates to a hot water recirculation system for recovering waste heat from flue gas, and relates to the field of desulfurization towers. The system includes a desulfurization tower body having a circular cross-section and a hollow interior, a bevel gear ring disposed on the inner wall of the desulfurization tower body and coaxial with the desulfurization tower body, a demister disposed on the bevel gear ring, a motor disposed on the outer wall of the desulfurization tower body, the motor's rotating shaft passing through the desulfurization tower body, a first bevel gear disposed on the motor's rotating shaft and meshing with the bevel gear ring, a high-pressure nozzle connected to a hot water pipe for spraying hot water onto the demister, and a reciprocating drive assembly disposed on the desulfurization tower body and connected to the motor for driving the high-pressure nozzle to move radially along the demister. The present application achieves more comprehensive and detailed cleaning of the demister using hot water recovered from waste heat.

Description

Technical Field

[0001] The present application relates to the field of desulfurization towers, and in particular to a hot water recirculation system for recovering waste heat from flue gas. Background Art

[0002] At present, when recycling the flue gas discharged from the desulfurization tower, the residual heat of the flue gas is usually used to heat or preheat cold water, and then the heated or preheated water is used to generate electricity. The demister in the desulfurization tower is an important component for removing water vapor and other particles in the flue gas. The demister needs to be cleaned and maintained regularly. The existing cleaning method of the demister is usually for the staff to clean the demister with a handheld high-pressure water gun, or to disassemble the demister for cleaning. It is relatively inconvenient and time-consuming. The staff holding the high-pressure water gun is prone to incomplete and incomplete cleaning. Hot water has better stain solubility than cold water or room temperature water. Most of the hot water heated by the flue gas can be used for power generation, and some can also be used to clean the demister. Therefore, how to use the hot water recovered from the waste heat to clean the demister more comprehensively and carefully becomes a problem. Summary of the Invention

[0003] In order to achieve more comprehensive and detailed cleaning of the demister using hot water recovered from waste heat, the present application provides a hot water recycling system for flue gas waste heat recovery.

[0004] This application provides a hot water recirculation system for flue gas waste heat recovery, which adopts the following technical solutions:

[0005] A hot water recycling system for recovering waste heat from flue gas, comprising

[0006] A desulfurization tower body, wherein the cross section of the desulfurization tower body is circular and the interior is a cavity;

[0007] A bevel gear ring is provided on the inner wall of the desulfurization tower body and is coaxial with the desulfurization tower body, and a demister is provided on the bevel gear ring;

[0008] a motor, disposed on the outer wall of the desulfurization tower body and having a rotating shaft passing through the desulfurization tower body;

[0009] a first bevel gear, disposed on the rotating shaft of the motor and meshing with the bevel gear ring;

[0010] a high-pressure nozzle, connected to the hot water pipe, for spraying hot water to the demister;

[0011] A reciprocating drive assembly is provided on the desulfurization tower body and connected to the motor, and is used for driving the high-pressure nozzle to move along the radial direction of the demister.

[0012] By adopting the above technical solution, the motor drives the first bevel gear to rotate, and the rotation of the first bevel gear drives the bevel gear ring to rotate, and then drives the demister to rotate together. During the rotation, the reciprocating drive assembly drives the high-pressure nozzle to move along the radial direction of the demister, so that it can more comprehensively cover all positions of the demister and flush more thoroughly. That is, when the demister is rotating, the high-pressure nozzle sprays hot water formed by utilizing the waste heat of the flue gas to the demister, and the high-pressure nozzle moves along the radial direction of the demister, thereby fully utilizing the hot water and cleaning the surface of the demister more comprehensively and carefully.

[0013] Optionally, the reciprocating drive assembly includes a second bevel gear provided on the motor output shaft, a third bevel gear provided on the motor output shaft, a support rod provided on the outer wall of the desulfurization tower body, a transmission rod provided on the support rod, a fourth bevel gear provided on the transmission rod, a transmission gear fixedly connected to the transmission rod, a first rack meshing with the transmission gear, and an adjustment assembly for controlling the fourth bevel gear to separately mesh with the second bevel gear and the third bevel gear;

[0014] The second bevel gear is arranged opposite to the third bevel gear, and the interval between the second bevel gear and the third bevel gear is greater than the diameter of the fourth bevel gear;

[0015] The first rack passes through the outer wall of the desulfurization tower body, the interior of the first rack is a cavity, and the high-pressure nozzle is arranged at one end of the first rack located inside the desulfurization tower body and is connected to the cavity in the first rack;

[0016] The transmission gear is located on the back of the fourth bevel gear, the transmission rod is slidably connected to the support rod, and the end of the transmission rod away from the support rod is fixedly connected to a bearing. The bearing is sleeved on the output shaft of the motor and located between the second bevel gear and the third bevel gear, and the bearing is slidably connected to the output shaft of the motor.

[0017] By adopting the above technical solution, the adjustment component drives the fourth bevel gear to move, so that the fourth bevel gear is engaged with the second bevel gear and the third bevel gear respectively. When the fourth bevel gear is engaged with the second bevel gear and the third bevel gear respectively, the fourth bevel gear can be rotated forward and reversed, thereby driving the transmission gear to rotate forward and reverse. The forward and reverse rotation of the transmission gear can drive the first rack to move toward the inside of the desulfurization tower body and to move toward the outside of the desulfurization tower body, thereby driving the high-pressure nozzle to move back and forth, achieving more comprehensive cleaning of the demister body. The rotation of the motor drives the demister to rotate and the reciprocating motion of the high-pressure nozzle respectively, thereby realizing the linkage between different functional components, improving the cleaning effect, saving installation space and the use of parts, and the first rack can reciprocate. When the desulfurization tower is performing desulfurization work, the first rack can move toward the outside of the desulfurization tower body to reduce the impact on the flue gas circulation.

[0018] Optionally, the adjustment assembly includes two first baffles provided at both ends of the bottom surface of the first rack, a contact switch provided on the outer wall of the desulfurization tower body, a connecting piece provided on the outer wall of the desulfurization tower body, two second baffles provided at both ends of the connecting piece, and an electric push rod provided on the outer wall of the desulfurization tower body, wherein the bottom surface of the first rack is the side opposite to the teeth;

[0019] The connecting piece is located below the contact switch and passes through the desulfurization tower body. The connecting piece is slidably connected to the desulfurization tower body. The two first blocking pieces, the two second blocking pieces, and the contact switch are all located at the same height. The two second blocking pieces are located between the two first blocking pieces. The two first blocking pieces are located inside and outside the desulfurization tower body, respectively. The two second blocking pieces are located inside and outside the desulfurization tower body, respectively.

[0020] The telescopic rod of the electric push rod is sleeved on the transmission rod and is rotatably connected to the transmission rod. The electric push rod is electrically connected to a contact switch. When the contact switch is triggered, the telescopic state of the electric push rod changes.

[0021] By adopting the above technical solution, when the first rack moves toward the inside of the demister, the first baffle located outside the desulfurization tower body moves toward the desulfurization tower body. When the first baffle contacts the second baffle outside the desulfurization tower, it pushes the second baffle to move and triggers the contact switch. After the contact switch is triggered, the state of the electric push rod changes, driving the fourth bevel gear to move. The second bevel gear and the other bevel gear of the third bevel gear are engaged and driven. The rotation direction of the fourth bevel gear changes, driving the rotation direction of the drive gear to change, and then driving the first rack to move toward the outside of the desulfurization tower body. When the first baffle inside the desulfurization tower contacts the second baffle inside the desulfurization tower, it pushes the second baffle to move and causes the second baffle at the other end to break away from contact with the contact switch. At this time, the state of the contact switch changes to an untriggered state. The state of the electric push rod changes again, driving the fourth bevel gear to move, and the original bevel gear is engaged with the fourth bevel gear, thereby causing the first rack to move toward the inside of the desulfurization tower again. Through the mutual cooperation between the electric push rod and the contact switch and other components, the movement direction of the first rack can be changed more flexibly.

[0022] Optionally, the demister is provided with a vibration component for driving the demister to vibrate, and the vibration component is connected to the output shaft of the motor.

[0023] By adopting the above technical solution, the motor drives the vibration component to operate, and the operation of the vibration component drives the demister to vibrate, thereby loosening particles and other attachments on the demister, enabling the high-pressure nozzle to flush the particles more easily and achieve better cleaning effect.

[0024] Optionally, the vibration assembly includes a half gear arranged on the output shaft of the motor, a first bottom plate and a second bottom plate arranged on the inner wall of the desulfurization tower, a knocking rod vertically passing through the first bottom plate and the second bottom plate, a second rack sleeved on the knocking rod, and a spring sleeved on the knocking rod;

[0025] The half gear is located in the desulfurization tower body, and the first bevel gear is located between the half gear and the desulfurization tower body;

[0026] The second rack is located between the first base plate and the second base plate, and the second rack is engaged with the half gear;

[0027] The spring is located between the first bottom plate and the second rack, and the first bottom plate and the second rack limit the spring.

[0028] By adopting the above technical solution, the motor drives the half gear to rotate during rotation. When the teeth on the half gear engage with the second rack, the second rack is driven to move vertically upward and compress the spring. The half gear continues to rotate so that the half gear disengages from the second rack. The compressed spring releases the pressure, thereby accelerating the knocking rod. The knocking rod hits the defogger, causing the defogger to vibrate, thereby loosening the particles and other debris on the defogger, making it easier to clean. While the defogger is rotating, the knocking rod periodically knocks on the defogger, thereby hitting different positions on the defogger, and fully knocking the particles and other debris at different positions on the defogger, so that the particles and debris at different positions on the defogger can be loosened more comprehensively.

[0029] Optionally, a knocking ball head is provided on the knocking rod, and a force ring is provided on the upper end surface of the demister, and a plurality of through holes are opened on the force ring.

[0030] By adopting the above technical solution, the knocking ball head can better release pressure, and the force of the knocking ball head acts on the force ring. The force ring separates the knocking ball head from the demister, so that the knocking ball head is not easy to cause damage to the demister body. The through hole connects the demister part below the force ring with the space inside the desulfurization tower body, so that the flue gas in the demister can circulate better.

[0031] Optionally, the multiple through holes are arranged at equal intervals along the circumferential direction of the force ring.

[0032] By adopting the above technical solution, multiple through holes are evenly spaced, so that the demister area below the stress ring can be better connected with the space inside the desulfurization tower body, and the high-pressure nozzle can clean the demister part below the stress ring through the through holes.

[0033] Optionally, a reducer is connected to the output shaft of the motor.

[0034] By adopting the above technical solution, the torque of the motor output shaft is reduced by the reducer, and the torque is increased, so that the motor can more easily drive the various components to operate.

[0035] Optionally, a limit frame is provided on the outer wall of the desulfurization tower body, and the first rack is located in the limit frame.

[0036] By adopting the above technical solution, the limit frame plays a role in supporting and guiding the first rack, so that the first rack is not easy to fall off or tilt horizontally on the desulfurization tower body, so that the first rack maintains lateral movement.

[0037] Optionally, a third baffle is provided on the first rack, and the third baffle is located at an end of the first rack where the high-pressure nozzle is provided, and the third baffle is located on a side of the first rack opposite to the first baffle.

[0038] By adopting the above technical solution, when the first rack is about to leave the interior of the desulfurization tower body, the third baffle plays a role of limiting and sealing the first rack, so that the flue gas in the desulfurization tower body is not easy to flow to the outside through the gap between the first rack and the desulfurization tower body, and the third baffle and the first baffle located in the desulfurization tower can both play a sealing role.

[0039] In summary, this application includes at least one of the following beneficial technical effects:

[0040] 1. The motor drives the first bevel gear to rotate, and the rotation of the first bevel gear drives the bevel gear ring to rotate, and then drives the demister to rotate together. During the rotation, the reciprocating drive assembly drives the high-pressure nozzle to move along the radial direction of the demister, so that it can more comprehensively cover all positions of the demister and flush more thoroughly. That is, when the demister is rotating, the high-pressure nozzle sprays hot water generated by the waste heat of the flue gas into the demister, and the high-pressure nozzle moves along the radial direction of the demister, thereby making full use of the hot water and cleaning the demister surface more comprehensively and carefully.

[0041] 2. When the first rack moves toward the inside of the demister, the first baffle located outside the desulfurization tower body moves toward the desulfurization tower body. When the first baffle contacts the second baffle outside the desulfurization tower, it pushes the second baffle to move and triggers the contact switch. After the contact switch is triggered, the state of the electric push rod changes, driving the fourth bevel gear to move. The second bevel gear and the other bevel gear of the third bevel gear engage and drive. The rotation direction of the fourth bevel gear changes, driving the rotation direction of the drive gear to change, and then driving the first rack to move toward the outside of the desulfurization tower body. When the first baffle inside the desulfurization tower contacts the second baffle inside the desulfurization tower, it pushes the second baffle to move and causes the second baffle at the other end to break away from contact with the contact switch. At this time, the state of the contact switch changes to an untriggered state. The state of the electric push rod changes again, driving the fourth bevel gear to move, and the original bevel gear engages with the fourth bevel gear, thereby causing the first rack to move toward the inside of the desulfurization tower again. The mutual cooperation between the electric push rod and the contact switch and other components allows the movement direction of the first rack to be more flexibly changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is an axonometric diagram of a hot water recycling system for recovering waste heat from flue gas according to an embodiment of the present application.

[0043] Figure 2 yes Figure 1 The figure shows a partial structural diagram of a hot water recirculation system for recovering waste heat from flue gas.

[0044] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0045] Figure 4 yes Figure 1 Another partial structural schematic diagram of a hot water recycling system for recovering waste heat from flue gas is shown.

[0046] Figure 5 yes Figure 4 Enlarged view of part B in the middle.

[0047] Explanation of the accompanying symbols: 1. Desulfurization tower body; 11. demister; 21. bevel gear ring; 22. first bevel gear; 3. motor; 4. high-pressure nozzle; 5. reciprocating drive assembly; 51. second bevel gear; 52. third bevel gear; 53. support rod; 54. transmission rod; 541. bearing; 55. fourth bevel gear; 56. transmission gear; 57. first rack; 571. third baffle; 58. adjustment assembly; 581. first baffle; 582. contact switch; 583. connecting plate; 584. second baffle; 585. electric push rod; 6. vibration assembly; 61. half gear; 62. first base plate; 63. second base plate; 64. knocking rod; 641. knocking ball head; 65. second rack; 66. spring; 67. force ring; 671. through hole; 7. reducer; 8. limit frame. DETAILED DESCRIPTION

[0048] The present application is further described in detail below with reference to the accompanying drawings.

[0049] The embodiments of the present application disclose a hot water recirculation system for recovering waste heat from flue gas.

[0050] Reference Figure 1 and Figure 2 A hot water recycling system for recovering waste heat from flue gas includes a desulfurization tower body 1, a bevel gear ring 21 arranged on the desulfurization tower body 1, a demister 11 arranged on the bevel gear ring 21, a motor 3 arranged on the outer wall of the desulfurization tower body 1, a first bevel gear 22 arranged on the rotating shaft of the motor 3, a high-pressure nozzle 4, and a reciprocating drive assembly 5 that drives the high-pressure nozzle 4 to reciprocate along the radial direction of the demister 11.

[0051] Reference Figure 2 and Figure 3The desulfurization tower body 1 is a cylindrical tower-shaped structure with a cavity inside. The demister 11 is located in the cavity and is arranged horizontally. The demister 11 is used to remove steam, particles and other impurities from the flue gas. The demister 11 is circular and coaxial with the desulfurization tower body 1. The bevel gear ring 21 is fixedly connected to the upper surface of the demister 11 and is coaxial with the demister 11. The motor 3 is fixedly connected to the outer wall of the desulfurization tower body 1 through a bracket. The output shaft of the motor 3 passes vertically through the side wall of the desulfurization tower body 1. The first bevel gear 22 is fixedly connected to the output shaft of the motor 3 and meshes with the bevel gear ring 21. The high-pressure nozzle 4 is connected to a pipe that uses the waste heat of the flue gas to heat cold water, so that the heated hot water can be used to rinse the demister 11. The better solubility of hot water in stains can further improve the cleaning effect. The reciprocating drive assembly 5 is arranged on the desulfurization tower body 1, and the high-pressure nozzle 4 is arranged on the reciprocating drive assembly 5, and the output shaft of the motor 3 is connected to the reciprocating drive assembly 5, so that the rotation of the motor 3 can drive the reciprocating drive assembly 5 to operate, and then drive the high-pressure nozzle 4 to make horizontal reciprocating movements along the radial direction of the demister 11. The rotation of the motor 3 drives the first bevel gear 22 to rotate, the rotation of the first bevel gear 22 drives the bevel gear ring 21 to rotate, and the rotation of the bevel gear ring 21 drives the demister 11 to rotate, so that the high-pressure nozzle 4 that reciprocates during the rotation of the demister 11 can more comprehensively and carefully rinse and clean the demister 11. And one motor 3 simultaneously drives the demister 11 to rotate and the high-pressure nozzle 4 to reciprocate, realizing the linkage coordination of the two functions and saving the number of components and installation space.

[0052] Reference Figure 2 and Figure 4 The reciprocating drive assembly 5 includes a second bevel gear 51 and a third bevel gear 52 fixedly connected to the output shaft of the motor 3, a support rod 53 fixedly connected to the outer wall of the desulfurization tower body 1, a transmission rod 54 slidably connected to the support rod 53, a fourth bevel gear 55 fixedly connected to the transmission rod 54, a transmission gear 56 fixedly connected to the transmission rod 54, a first rack 57 meshing with the transmission gear 56, and an adjustment assembly 58 for controlling the fourth bevel gear 55 to separately mesh with the second bevel gear 51 and the third bevel gear 52. The first rack 57 passes through the desulfurization tower body 1 and is slidably connected to the desulfurization tower body 1. The interior of the first rack 57 is a cavity opened along the length direction of the first rack 57, which acts as a pipe. The cavity of the first rack 57 is connected to a pipe that uses the waste heat of the flue gas to heat cold water, and the high-pressure nozzle 4 is arranged on one end of the first rack 57 located inside the desulfurization tower body 1.

[0053] Reference Figure 2 and Figure 4The second bevel gear 51 and the third bevel gear 52 are located outside the desulfurization tower body 1, and the second bevel gear 51 and the third bevel gear 52 are arranged opposite to each other. The distance between the second bevel gear 51 and the third bevel gear 52 is greater than the diameter of the fourth bevel gear 55. The fourth bevel gear 55 is located between the second bevel gear 51 and the third bevel gear 52, and above the second bevel gear 51 and the third bevel gear 52. The support rod 53 is vertically fixed to the outer wall of the desulfurization tower and is located above the third bevel gear 52. A sliding groove is provided on the top surface of the support rod 53, making the support rod 53 U-shaped. One end of the transmission rod 54 is located in the sliding groove of the support rod 53, so that the transmission rod 54 can slide on the support rod 53. The transmission rod 54 is vertically arranged. The other end of the transmission rod 54 is fixedly connected to a bearing 541. The bearing 541 is sleeved on the output shaft of the motor 3 and is located between the second bevel gear 51 and the third bevel gear 52. The bearing 541 is slidably connected to the output shaft of the motor 3, that is, the bearing 541 can slide between the second bevel gear 51 and the third bevel gear 52, and the transmission rod 54 is rotatably connected to the output shaft of the motor 3 through the bearing 541. The adjustment component 58 is connected to the transmission rod 54 and is used to drive the transmission rod 54 to move. The movement of the transmission rod 54 can drive the fourth bevel gear 55 to move, thereby enabling the fourth bevel gear 55 to engage with the second bevel gear 51 and the third bevel gear 52 respectively.

[0054] The motor 3 rotates to drive the second bevel gear 51 and the third bevel gear 52 to rotate. At this time, the adjustment component 58 controls the fourth bevel gear 55 and the second bevel gear 51 to rotate. The rotation of the second bevel gear 51 drives the fourth bevel gear 55 to rotate. The rotation of the second bevel gear 51 drives the transmission gear 56 to rotate. The rotation of the transmission gear 56 drives the first rack 57 to move toward the inside of the desulfurization tower body 1. When the first rack 57 moves, it drives the high-pressure nozzle 4 to move along the radial direction of the demister 11, thereby cleaning the rotating demister 11. When the high-pressure nozzle 4 moves toward the inside of the desulfurization tower until it is aligned with the desulfurization tower body 1, the high-pressure nozzle 4 moves toward the inside of the desulfurization tower body 1 until it is aligned with the desulfurization tower body 1. When the inner wall of the tower is in contact, the adjusting assembly 58 drives the fourth bevel gear 55 to disengage from the second bevel gear 51, and then drives the fourth bevel gear 55 to engage with the third bevel gear 52. Therefore, when the rotation direction of the motor 3 remains unchanged, the engagement of the fourth bevel gear 55 with the third bevel gear 52 can change the rotation direction of the fourth bevel gear 55, thereby changing the rotation direction of the transmission gear 56, and then changing the moving direction of the first rack 57 from moving toward the inside of the desulfurization tower to moving toward the outside of the desulfurization tower. At this time, the high-pressure nozzle 4 also moves toward the outside of the desulfurization tower and flushes the demister 11.

[0055] The first bevel gear 22 and the bevel gear ring 21 are rotated by the rotation of the motor 3, thereby rotating the demister 11, and the reciprocating drive assembly 5 is driven by the rotation of the motor 3 to operate, thereby causing the high-pressure nozzle 4 to reciprocate along the radial direction of the demister 11, and the hot water formed by the recovery of the flue gas passes through the first rack 57 and the high-pressure nozzle 4 to clean the demister 11, thereby achieving more comprehensive and detailed cleaning of the demister 11.

[0056] Reference Figure 2 In order to make the first rack 57 move more stably, a limit frame 8 is fixedly connected to the outer wall of the desulfurization tower body 1. The vertical cross-section of the limit frame 8 is U-shaped. The first rack 57 is located in the limit frame 8, thereby supporting and guiding the first rack 57, making the first rack 57 more stable during sliding and not easy to deviate from the direction.

[0057] Reference Figure 1 and Figure 2 Because there is a gap between the teeth of the first rack 57 and the sidewall of the desulfurization tower body 1, a third baffle 571 is fixedly connected to the first rack 57. The third baffle 571 is located at the end of the first rack 57 where the high-pressure nozzle 4 is located, and is located on the side with the teeth. That is, the third baffle 571 and the first baffle 581 are located on two opposite end faces. When the high-pressure nozzle 4 moves toward the outside of the desulfurization tower body 1 and is about to contact the inner wall of the desulfurization tower body 1, the third baffle 571 and the first baffle 581 located inside the desulfurization tower body 1 come into contact with the inner wall of the desulfurization tower body 1, thereby acting as a limiter and sealing force, preventing the flue gas in the desulfurization tower body 1 from leaking and preventing the first rack 57 from moving outside the desulfurization tower body 1.

[0058] Reference Figure 3 and Figure 4The adjustment assembly 58 includes two first baffles 581 fixedly connected to the first rack 57, a contact switch 582 fixedly connected to the outer wall of the desulfurization tower body 1, a connecting piece 583 disposed on the outer wall of the desulfurization tower body 1, two second baffles 584 disposed on the connecting piece 583, and an electric push rod 585 fixedly connected to the outer wall of the desulfurization tower. The telescopic rod of the electric push rod 585 is sleeved on the transmission rod 54 and is rotatably connected to the transmission rod 54. The telescopic rod of the electric push rod 585 is located between the fourth bevel gear 55 and the transmission gear 56. The connecting piece 583 passes through the sidewall of the desulfurization tower body 1 and is slidably connected to the desulfurization tower body 1. Two second baffles 584 are fixedly connected to each end of the connecting piece 583, one located inside the desulfurization tower body 1 and the other located outside. The contact switch 582 is located between the second baffle 584 located outside the desulfurization tower body 1 and the desulfurization tower body 1. The contact switch 582 is connected to the electric push rod 585 via a wire. The two first baffles 581 are both located on the bottom surface of the first rack 57, the bottom surface of the first rack 57 being the surface opposite the teeth. One first baffle 581 is located outside the desulfurization tower, and the other is located inside the desulfurization tower. The distance between the two first baffles 581 is the same as the diameter of the demister 11. The two first baffles 581, the two second baffles 584, and the contact switch 582 are all located at the same height.

[0059] The electric push rod 585 is initially in an extended state. At this time, the fourth bevel gear 55 is engaged with the second bevel gear 51. The rotation of the motor 3 drives the second bevel gear 51 to rotate, and the rotation of the second bevel gear 51 drives the transmission gear 56 to rotate. The rotation of the transmission gear 56 drives the first rack 57 to move toward the interior of the desulfurization tower body 1, and then drives the high-pressure nozzle 4 to move toward the interior of the desulfurization tower body 1, while cleaning the demister 11. At this time, the first baffle 581 located outside the desulfurization tower body 1 also moves toward the desulfurization tower body 1. When the high-pressure nozzle 4 is about to contact the inner wall of the desulfurization tower, the first baffle 581 located outside the desulfurization tower body 1 presses against the second baffle 584 located outside the desulfurization tower body 1 and pushes the second baffle 584 to move toward the inside of the desulfurization tower body 1. During the movement, the second baffle 584 touches the contact switch 582. After the contact switch 582 is triggered, the telescopic state of the electric push rod 585 is changed from extension to contraction, driving the transmission rod 54 to move toward the third bevel gear 52, so that the fourth bevel gear 55 engages with the third bevel gear 52, and then changes the rotation direction of the fourth bevel gear 55. The change in the rotation direction of the fourth bevel gear 55 causes the first rack 57 to move toward the outside of the desulfurization tower body 1. During the movement, the high-pressure nozzle 4 continues to clean the rotating demister 11. When the high-pressure nozzle 4 is about to contact the inner wall of the desulfurization tower body 1, the first baffle 581 located inside the desulfurization tower body 1 presses against the second baffle 584 located inside the desulfurization tower body 1 and pushes the second baffle 584 toward the outside of the desulfurization tower body 1, thereby disengaging the second baffle 584 outside the desulfurization tower body 1 from the contact switch 582. This retracts the electric push rod 585 again, causing the push rod 585 to extend, driving the transmission rod 54 toward the second bevel gear 51, causing the fourth bevel gear 55 to mesh with the second bevel gear 51 again, thereby moving the first rack 57 toward the inside of the desulfurization tower body 1 again. This ultimately achieves reciprocating motion of the high-pressure nozzle 4, improving comprehensive cleaning coverage. Furthermore, since the first rack 57 does not point toward the center of the demister 11, the angle of the high-pressure nozzle 4 can be adjusted to align the nozzle 4 toward the center of the demister 11, ultimately achieving more comprehensive cleaning of the demister 11. In other embodiments, the number of high-pressure nozzles 4 may be multiple. Furthermore, the electric push rod 585 enters a self-locking state after being extended and contracted, thereby enabling the fourth bevel gear 55 to mesh more stably with the second bevel gear 51 and the third bevel gear 52 .

[0060] In order to more easily remove particles and other debris on the demister 11, refer to Figure 3 and Figure 4A vibration assembly 6 is provided on the demister 11 for driving the demister 11 to vibrate. The vibration assembly 6 is also connected to the output shaft of the motor 3. The rotation of the motor 3 drives the vibration assembly 6 to operate, and the vibration assembly 6 drives the demister 11 to vibrate, thereby loosening particles and other debris attached to the demister 11, which can be more easily washed away, further improving the cleaning effect. The vibration assembly 6 includes a half-gear 61 fixedly connected to the output shaft of the motor 3, a first base plate 62 and a second base plate 63 fixedly connected to the inner wall of the desulfurization tower, a knocking rod 64 vertically passing through the first base plate 62 and the second base plate 63, a second rack 65 sleeved on the knocking rod 64, and a spring 66 sleeved on the knocking rod 64. The half-gear 61 is located inside the desulfurization tower body 1, and the first bevel gear 22 is located between the half-gear 61 and the inner wall of the desulfurization tower body 1. The first base plate 62 and the second base plate 63 are arranged vertically, with the first base plate 62 on top and the second base plate 63 on the bottom. The knocking rod 64 is slidingly connected to the first base plate 62 and the second base plate 63, the second rack 65 is located between the first base plate 62 and the second base plate 63, the spring 66 is located between the first base plate 62 and the second rack 65, one end of the spring 66 is fixedly connected to the first base plate 62, and the other end is fixedly connected to the second rack 65.

[0061] During the rotation of the motor 3, the half gear 61 is driven to rotate. Since only a part of the circumference of the half gear 61 has teeth, when the half gear 61 is engaged with the second rack 65, the second rack 65 is driven to move vertically upward, and the spring 66 is compressed during the movement. When the half gear 61 is disengaged from the second rack 65, the spring 66 in the compressed state releases the pressure, pushing the knocking rod 64 to move downward, so that the knocking rod 64 knocks the demister 11, and the demister 11 vibrates, thereby loosening the particles and other attachments on the demister 11. This makes it easier for the high-pressure nozzle 4 to flush and remove the particles and other attachments. Since the demister 11 is always in a rotating state, the knocking rod 64 can knock on different positions of the demister 11, thereby uniformly vibrating all parts of the demister 11, so that the particles attached to all parts of the demister 11 are fully loosened.

[0062] In order to make the knocking rod 64 vibrate the demister 11 better and reduce the damage to the demister 11, refer to Figure 3 and Figure 4A knocking ball head 641 is fixedly connected to the knocking rod 64, and the knocking ball head 641 is located below the second base plate 63. A force ring 67 is fixedly connected to the upper surface of the demister 11, and the force ring 67 is located below the knocking ball head 641. A plurality of through holes 671 are also provided in the circumferential direction of the force ring 67. The through holes 671 connect the demister 11 area below the force ring 67 with the internal space of the desulfurization tower body 1, so as to better circulate the flue gas and enable the high-pressure nozzle 4 to better clean the demister 11 below the force ring 67. The knocking ball head 641 can fully release the pressure on the force ring 67, and the force ring 67 separates the knocking ball head 641 from the demister 11 body, so that the knocking ball head 641 does not directly knock on the demister 11, reducing the damage to the demister 11 caused by the knocking ball head 641. In other embodiments, the force ring 67 can also be a mesh structure.

[0063] Reference Figure 2 and Figure 4 A reducer 7 is fixedly connected between the second bevel gear 51 and the motor 3. The reducer 7 reduces the speed of the motor 3 and increases the output torque, so that the motor 3 can more easily drive the operation of the first bevel gear 22, the reciprocating drive assembly 5 and the vibration assembly 6.

[0064] Furthermore, a valve (not shown) may be fixedly connected to the first rack 57. The valve is located at one end of the first rack 57 outside the desulfurization tower body 1 and communicates with the cavity of the first rack 57. The valve is also connected to a pipeline that generates hot water using waste heat from flue gas, thereby more conveniently controlling the on / off flow of hot water. The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, any equivalent changes based on the structure, shape, and principle of this application shall be covered by the scope of protection of this application.

Claims

1. A hot water recirculation system for recovering waste heat from flue gas, characterized by: include A desulfurization tower body (1), wherein the cross section of the desulfurization tower body (1) is circular and the interior is a cavity; A bevel gear ring (21) is arranged on the inner wall of the desulfurization tower body (1) and is coaxial with the desulfurization tower body (1), and a demister (11) is arranged on the bevel gear ring (21); A motor (3) is arranged on the outer wall of the desulfurization tower body (1), and a rotating shaft of the motor (3) passes through the desulfurization tower body (1); a first bevel gear (22) disposed on the rotating shaft of the motor (3) and meshing with the bevel gear ring (21); a high-pressure nozzle (4), connected to a hot water pipe, for spraying hot water toward the demister (11); A reciprocating drive assembly (5), arranged on the desulfurization tower body (1) and connected to the motor (3), is used to drive the high-pressure nozzle (4) to move radially along the demister (11); The reciprocating drive assembly (5) comprises a second bevel gear (51) arranged on the output shaft of the motor (3), a third bevel gear (52) arranged on the output shaft of the motor (3), a support rod (53) arranged on the outer wall of the desulfurization tower body (1), a transmission rod (54) arranged on the support rod (53), a fourth bevel gear (55) arranged on the transmission rod (54), a transmission gear (56) fixedly connected to the transmission rod (54), a first rack (57) meshed with the transmission gear (56), and an adjustment assembly (58) for controlling the fourth bevel gear (55) to mesh with the second bevel gear (51) and the third bevel gear (52) respectively. The second bevel gear (51) and the third bevel gear (52) are arranged opposite to each other, and the interval between the second bevel gear (51) and the third bevel gear (52) is greater than the diameter of the fourth bevel gear (55); The first rack (57) passes through the outer wall of the desulfurization tower body (1), the interior of the first rack (57) is a cavity, and the high-pressure nozzle (4) is arranged at one end of the first rack (57) located inside the desulfurization tower body (1) and is connected to the cavity inside the first rack (57); The transmission gear (56) is located on the back side of the fourth bevel gear (55), the transmission rod (54) is slidably connected to the support rod (53), and one end of the transmission rod (54) away from the support rod (53) is fixedly connected to a bearing (541), the bearing (541) is sleeved on the output shaft of the motor (3) and is located between the second bevel gear (51) and the third bevel gear (52), and the bearing (541) is slidably connected to the output shaft of the motor (3).

2. The hot water recirculation system for flue gas waste heat recovery according to claim 1, characterized in that: The adjustment assembly (58) comprises two first baffles (581) arranged at both ends of the bottom surface of the first rack (57), a contact switch (582) arranged on the outer wall of the desulfurization tower body (1), a connecting piece (583) arranged on the outer wall of the desulfurization tower body (1), two second baffles (584) arranged at both ends of the connecting piece (583), and an electric push rod (585) arranged on the outer wall of the desulfurization tower body (1), wherein the bottom surface of the first rack (57) is the side opposite to the teeth; The connecting piece (583) is located below the contact switch (582) and passes through the desulfurization tower body (1). The connecting piece (583) is slidably connected to the desulfurization tower body (1). The two first baffles (581), the two second baffles (584) and the contact switch (582) are all located at the same height. The two second baffles (584) are located between the two first baffles (581). The two first baffles (581) are respectively located inside the desulfurization tower body (1) and outside the desulfurization tower body (1). The two second baffles (584) are respectively located inside the desulfurization tower body (1) and outside the desulfurization tower body (1). The telescopic rod of the electric push rod (585) is sleeved on the transmission rod (54) and is rotatably connected to the transmission rod (54). The electric push rod (585) is electrically connected to the contact switch (582). When the contact switch (582) is triggered, the telescopic state of the electric push rod (585) changes.

3. The hot water recirculation system for flue gas waste heat recovery according to claim 1, characterized in that: The demister (11) is provided with a vibration component (6) for driving the demister (11) to vibrate, and the vibration component (6) is connected to the output shaft of the motor (3).

4. The hot water recirculation system for flue gas waste heat recovery according to claim 3, characterized in that: The vibration assembly (6) comprises a half gear (61) arranged on the output shaft of the motor (3), a first base plate (62) and a second base plate (63) arranged on the inner wall of the desulfurization tower, a knocking rod (64) vertically passing through the first base plate (62) and the second base plate (63), a second rack (65) sleeved on the knocking rod (64), and a spring (66) sleeved on the knocking rod (64); The half gear (61) is located inside the desulfurization tower body (1); The second rack (65) is located between the first base plate (62) and the second base plate (63), and the second rack (65) is meshed with the half gear (61); The spring (66) is located between the first bottom plate (62) and the second rack (65), and the first bottom plate (62) and the second rack (65) limit the spring (66).

5. The hot water recirculation system for flue gas waste heat recovery according to claim 4, characterized in that: The knocking rod (64) is provided with a knocking ball head (641), the upper end surface of the demister (11) is provided with a force ring (67), and the force ring (67) is provided with a plurality of through holes (671).

6. The hot water recirculation system for flue gas waste heat recovery according to claim 5, characterized in that: The plurality of through holes (671) are arranged at equal intervals along the circumferential direction of the force ring (67).

7. The hot water recirculation system for flue gas waste heat recovery according to claim 1, characterized in that: A speed reducer (7) is connected to the output shaft of the motor (3).

8. The hot water recirculation system for flue gas waste heat recovery according to claim 2, characterized in that: A limit frame (8) is provided on the outer wall of the desulfurization tower body (1), and the first rack (57) is located in the limit frame (8).

9. The hot water recirculation system for flue gas waste heat recovery according to claim 2, characterized in that: A third baffle (571) is provided on the first rack (57), and the third baffle (571) is located at one end of the first rack (57) where the high-pressure nozzle (4) is provided, and the third baffle (571) is located on a side of the first rack (57) opposite to the first baffle (581).

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