Boiler tail flue heat utilization device

Abstract

The application discloses a boiler tail flue gas heat utilization device and relates to the technical field of flue gas heat utilization. The boiler tail flue gas heat utilization device comprises a flue gas passing bin, a boiler water supplement bin is assembled on the top of the flue gas passing bin through a partition, a dust collecting bin is assembled on the bottom of the flue gas passing bin, a heat transfer plate is assembled between the flue gas passing bin and the boiler water supplement bin, a fixing seat is assembled in the flue gas passing bin, and a reciprocating screw rod driven by a servo motor is rotationally connected to the inside of the fixing seat. The boiler tail flue gas heat utilization device is characterized in that flue gas is introduced into the flue gas passing bin, water to be heated is injected into the boiler water supplement bin, two servo motors are started, the reciprocating screw rod and the stirring rod are driven to rotate, and the hydraulic bin, the stress rod, the gear ring, the spring one, the gear one, the rotating rod, the bevel gear one, the bevel gear two and the overturning plate are cooperated, so that the heat conduction efficiency of the device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas heat utilization, in particular to a boiler tail flue gas heat utilization device. BACKGROUND

[0002] The boiler tail flue gas heat utilization device mainly relates to the heat recovery and utilization of exhaust gas, especially the tail flue gas, generated in the combustion process of a boiler. In the combustion process of a boiler, fuel releases heat through a combustion reaction, which is converted into steam or hot water for production processes, heating or power generation. However, after the combustion of the boiler, the exhaust gas discharged is usually at a high temperature, which contains a large amount of heat that is not fully utilized. If this part of heat cannot be effectively recovered, not only energy is wasted, but also pollution is caused to the environment.

[0003] A coal-fired flue gas waste heat recycling, emission reduction and ash removal integrated device and method are disclosed in Chinese Patent CN104713075B granted and announced on May 18, 2016. The box is divided into an upper space and a lower space by a transverse partition, the upper part is a cold fluid flow space, i.e. a boiler water supply flow space; the lower part is a hot fluid flow space, i.e. a flue gas flow space; and a plurality of heat transfer pipes passing through the partition are vertically arranged in the shell, the upper end of the heat transfer pipe is located in the cold fluid flow space, and the lower end of the heat transfer pipe is located in the hot fluid flow space. The heat transfer pipe transfers the heat in the flue gas to the boiler water supply, and the boiler water supply with increased temperature is sent into the boiler to realize flue gas waste heat recycling. In the above application file, the heat of the flue gas is conducted to the water in the box by using a plurality of heat transfer pipes. The water in the box is in a relatively static state during heat conduction, so that the efficiency of heat conduction of the device is low. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a boiler tail flue gas heat utilization device to solve the problems raised in the background art. To achieve the above purpose, the present application is implemented by the following technical scheme: a boiler tail flue gas heat utilization device, comprising a flue gas passing bin, a boiler water supply bin is assembled on the top of the flue gas passing bin by setting a partition, a dust collecting bin is assembled on the bottom of the flue gas passing bin, a heat transfer plate is assembled between the flue gas passing bin and the boiler water supply bin, a fixed seat is assembled in the inside of the flue gas passing bin, a reciprocating screw rod driven by a servo motor is rotatably connected in the inside of the fixed seat, a sliding block is connected to the outside of the reciprocating screw rod by setting threads, and a cleaning plate is rotatably connected to the side surface of the sliding block.

[0005] The inside of the boiler water replenishing bin is provided with a feed water heating assembly, the inside of the flue gas passing bin is provided with an agitating rod driven by a servo motor, one end of the hydraulic bin is slidably connected with a force receiving rod, the other end of the hydraulic bin is slidably connected with a gear ring, the bottom of the force receiving rod is provided with a spring one, the inside of the agitating rod is rotatably connected with a gear one and a rotating rod, the bottom of the gear one is drivingly connected with a bevel gear one, the side of the rotating rod is fixedly connected with a bevel gear two, the outside of the rotating rod is fixedly connected with a turning plate.

[0006] Preferably, the sliding block is located in the inside of the fixed seat and is in a sliding connection state with the fixed seat.

[0007] Preferably, the spring one is away from the one end of the force receiving rod and is assembled on the inner wall of the hydraulic bin.

[0008] Preferably, the gear one is engaged with the gear ring when the feed water heating assembly is started.

[0009] Preferably, the bevel gear two is located at the side of the bevel gear one and is in an engagement state with the bevel gear one.

[0010] Preferably, the inside of the flue gas passing bin is provided with a cleaning assembly, the cleaning assembly comprises a gear rod, the outside of the cleaning plate is fixedly connected with a disc, the outside of the disc is rotatably connected with a gear tooth through the setting of a torsion spring block, the inside of the cleaning plate is provided with a placing groove one, the inside of the placing groove one is assembled with an iron block, and the inside of the flue gas passing bin is assembled with a magnetic block. Through the setting of the cleaning assembly, the both ends of the cleaning plate can clean the surface of the heat transfer plate in turn, and the cleaning effect of the device is improved.

[0011] Preferably, the gear rod is located at the side of the fixed seat and is in a fixed state with the fixed seat.

[0012] Preferably, the inside of the dust collecting bin is provided with a vibration assembly, the outside of the reciprocating wire rod is fixedly connected with a chain wheel one, the outside of the chain wheel one is assembled with a chain, the outside of the rotating rod is fixedly connected with a chain wheel two, the outside of the rotating rod is fixedly connected with a cam, the inside of the cam is provided with a placing groove two, and the inside of the placing groove two is assembled with a gravity block. Through the setting of the vibration assembly, the dust collecting bin can be vibrated twice, the collected dust in the dust collecting bin can be arranged due to the vibration, and the collecting efficiency of the dust collecting bin is improved.

[0013] Preferably, the rotating rod is located in the inside of the dust collecting bin and is in a rotating connection state with the dust collecting bin.

[0014] Preferably, the chain is assembled at the outer side of the second sprocket away from one end of the first sprocket.

[0015] The application provides a boiler tail flue gas heat utilization device.

[0016] (1) The boiler tail flue gas heat utilization device passes flue gas into the flue gas passing bin, injects water to be heated into the boiler water supplement bin, starts two servo motors, drives the reciprocating screw rod and the stirring rod to rotate respectively, and cooperates with the hydraulic bin, the stress rod, the gear ring, the spring one, the gear one, the rotating rod, the bevel gear one, the bevel gear two and the overturning plate, so that the heat conduction efficiency of the device is improved.

[0017] (2) The boiler tail flue gas heat utilization device reciprocally moves the sliding block in the vertical direction, drives the cleaning plate to reciprocally move in the vertical direction, cooperates with the toothed rod, the disc, the torsional spring block, the tooth, the placing groove one, the iron block and the magnetic block, so that the two ends of the cleaning plate clean the surface of the heat transfer plate in turn, and the cleaning effect of the device is improved.

[0018] (3) The boiler tail flue gas heat utilization device cooperates with the rotating rod, the sprocket one, the chain, the sprocket two, the cam, the placing groove two and the gravity block when the reciprocating screw rod rotates, so that the dust collection bin is vibrated again, the collected dust in the dust collection bin is arranged due to vibration, and the collection efficiency of the dust collection bin is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0020] Figure 1 It is a schematic diagram of the overall appearance three-dimensional structure of the application;

[0021] Figure 2 It is a schematic diagram of the overall cross-sectional three-dimensional structure of the application;

[0022] Figure 3 It is a schematic diagram of the water supply heating assembly three-dimensional structure of the application;

[0023] Figure 4 It is a schematic diagram of the cleaning assembly three-dimensional structure of the application; Figure 3 It is a schematic diagram of the enlarged structure of A in the application;

[0024] Figure 5 It is a schematic diagram of the cleaning assembly three-dimensional structure of the application;

[0025] Figure 6 For the purpose of the present invention Figure 5 Amplification structure schematic diagram in B of the present invention

[0026] Figure 7 Three-dimensional structure schematic diagram of the vibration assembly of the present invention

[0027] Figure 8 For the purpose of the present invention Figure 7 Amplification structure schematic diagram in C of the present invention

[0028] In the figure:

[0029] 100, flue gas through the warehouse; 200, boiler water supply warehouse; 300, dust collection warehouse; 400, heat transfer plate; 500, fixed seat; 600, reciprocating screw rod; 700, sliding block; 800, cleaning plate;

[0030] 900, feed water heating assembly; 901, hydraulic chamber; 902, stirring rod; 903, force rod; 904, gear ring; 905, spring one; 906, gear one; 907, rotating rod; 908, bevel gear one; 909, bevel gear two; 910, turnover plate;

[0031] 1000, cleaning assembly; 1001, toothed rod; 1002, disc; 1003, torsional spring block; 1004, tooth; 1005, placement groove one; 1006, iron block; 1007, magnetic block;

[0032] 1100, vibration assembly; 1101, rotating rod; 1102, chain wheel one; 1103, chain; 1104, chain wheel two; 1105, cam; 1106, placement groove two; 1107, gravity block. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the present invention will be described clearly and completely below in combination with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present invention.

[0034] Embodiment one, please refer to Figures 1-4The utility model provides a boiler tail flue heat utilization device, including flue gas passes through the storehouse 100, the top of flue gas passes through the storehouse 100 is equipped with the boiler water replenishing storehouse 200 by setting the baffle, the bottom of flue gas passes through the storehouse 100 is equipped with dust collection storehouse 300, and the heat transfer plate 400 is equipped between flue gas passes through the storehouse 100 and boiler water replenishing storehouse 200, the inside of flue gas passes through the storehouse 100 is equipped with fixed seat 500, the inside rotation is connected with the reciprocating screw rod 600 by servo motor drive of fixed seat 500, the outside is equipped with sliding block 700 by setting the screw thread of reciprocating screw rod 600, and sliding block 700 is located in the inside of fixed seat 500, and with fixed seat 500 between sliding connection state, and the side of sliding block 700 is rotatably connected with cleaning plate 800;

[0035] The inside of boiler water replenishing storehouse 200 is provided with feedwater heating assembly 900, and feedwater heating assembly 900 includes hydraulic storehouse 901, and the inside of flue gas passes through the storehouse 100 is equipped with the stirring rod 902 by servo motor drive, the flue gas is passed into flue gas passes through the storehouse 100, and the water to be heated is injected into boiler water replenishing storehouse 200, and two servo motors are started, and reciprocating screw rod 600 and stirring rod 902 are driven to rotate respectively, and sliding block 700 is assembled on reciprocating screw rod 600 by screw thread and is restricted by fixed seat 500, so as to reciprocate in vertical direction, so that sliding block 700 moves and drives cleaning plate 800 rotatably connected with it, and preliminary cleaning operation is carried out to heat transfer plate 400.

[0036] One end of hydraulic storehouse 901 is slidably connected with stress rod 903, the other end of hydraulic storehouse 901 is slidably connected with gear ring 904, the bottom of stress rod 903 is equipped with spring one 905, the end, away from stress rod 903, of spring one 905 is assembled on the inner wall of hydraulic storehouse 901, the inside of stirring rod 902 is rotatably connected with gear one 906 and rotating rod 907 respectively, when feedwater heating assembly 900 is started, gear one 906 is engaged with gear ring 904.When sliding block 700 moves downward, stress rod 903 can be extruded and driven to move downward, in cooperation with hydraulic storehouse 901 slidably connected with stress rod 903, so that the pressure in hydraulic storehouse 901 increases, gear ring 904 slidably connected with hydraulic storehouse 901 is driven to move to the side, and gear ring 904 moves to the position of engagement with gear one 906, and because gear one 906 is in revolution with stirring rod 902 at this time, gear one 906 is driven to rotate under the action of gear ring 904.

[0037] The bottom of the gear one 906 is transmissionally connected with a bevel gear one 908, the side of the rotating rod 907 is fixedly connected with a bevel gear two 909, the bevel gear two 909 is located at the side of the bevel gear one 908 and is in meshing state with the bevel gear one 908, and the outside of the rotating rod 907 is fixedly connected with a turnover plate 910. When the gear one 906 rotates, the bevel gear one 908 connected with the gear one 906 rotates, the bevel gear two 909 meshing with the bevel gear one 908 rotates, the rotating rod 907 fixedly connected with the bevel gear two 909 rotates, and the turnover plate 910 fixedly connected with the rotating rod 907 rotates, so that the water near the bottom of the boiler water supplement bin 200 is turned up. When the sliding block 700 moves up, the stress rod 903 is no longer limited and resets under the action of the spring one 905, and the gear ring 904 resets, so that the turnover plate 910 stops rotating. In this way, the turnover plate 910 can intermittently turn the water in the boiler water supplement bin 200. The heat conduction efficiency of the device is improved.

[0038] In use, flue gas is introduced into the flue gas passing bin 100, water to be heated is injected into the boiler water supplement bin 200, and the two servo motors are started to drive the reciprocating screw rod 600 and the stirring rod 902 to rotate. The sliding block 700 threaded on the reciprocating screw rod 600 is limited in the vertical direction by the fixed seat 500, so that the sliding block 700 drives the cleaning plate 800 connected with it to move, and the heat transfer plate 400 is preliminarily cleaned. When the sliding block 700 moves down, the stress rod 903 is extruded and moves down, and the hydraulic bin 901 connected with the stress rod 903 moves, so that the pressure in the hydraulic bin 901 increases, the gear ring 904 connected with the hydraulic bin 901 moves to the side, and the gear ring 904 moves to the position meshing with the gear one 906. Because the gear one 906 rotates around the stirring rod 902 at this time, the gear one 906 rotates under the action of the gear ring 904, the bevel gear one 908 connected with the gear one 906 rotates, the bevel gear two 909 meshing with the bevel gear one 908 rotates, the rotating rod 907 fixedly connected with the bevel gear two 909 rotates, and the turnover plate 910 fixedly connected with the rotating rod 907 rotates, so that the water near the bottom of the boiler water supplement bin 200 is turned up. When the sliding block 700 moves up, the stress rod 903 is no longer limited and resets under the action of the spring one 905, and the gear ring 904 resets, so that the turnover plate 910 stops rotating. In this way, the turnover plate 910 can intermittently turn the water in the boiler water supplement bin 200.

[0039] Embodiment two, please refer to Figures 1-6On the basis of embodiment one, the inside of the flue gas passes through the bin 100 is provided with a cleaning assembly 1000, the cleaning assembly 1000 includes a rack bar 1001, the rack bar 1001 is located at the side of the fixed seat 500, and is in a fixed state with the fixed seat 500, the outside of the cleaning plate 800 is fixedly connected with a disc 1002, the outside of the disc 1002 is rotatably connected with a tooth 1004 through the setting of a torsion spring block 1003.When the sliding block 700 reciprocatingly moves in the vertical direction, the cleaning plate 800 rotatably connected with it can be driven to reciprocatingly move in the vertical direction, and when the cleaning plate 800 moves downward to the rack bar 1001, the tooth 1004 moves to the rack bar 1001 and is extruded by the rack bar 1001, at this time, because the tooth 1004 is not limited by the disc 1002, the tooth 1004 rotates around the torsion spring block 1003, so as to avoid the rack bar 1001, so that the disc 1002 does not rotate in this case; when the cleaning plate 800 moves downward beyond the rack bar 1001, the tooth 1004 moves to the rack bar 1001 when the cleaning plate 800 moves upward, the tooth 1004 is extruded by the rack bar 1001, at this time, because the tooth 1004 is limited by the disc 1002, it cannot rotate around the torsion spring block 1003, so that the disc 1002 is engaged with the rack bar 1001 through the tooth 1004, and the disc 1002 can rotate under the action of the rack bar 1001 when the cleaning plate 800 moves upward.

[0040] The inside of the cleaning plate 800 is provided with a placing groove one 1005, the inside of the placing groove one 1005 is assembled with an iron block 1006, and the inside of the flue gas passing through the bin 100 is assembled with a magnetic block 1007.When the disc 1002 rotates, the disc 1002 drives the cleaning plate 800 fixedly connected with it to rotate by one hundred and eighty degrees, the placing groove one 1005 provided in the cleaning plate 800 rotates at the same time, the iron block 1006 in the placing groove one 1005 moves to the other side under the action of the magnetic block 1007, the magnetic block 1007 and the iron block 1006 attract each other, so as to maintain the cleaning plate 800 in a relatively stable state; in this way, the cleaning plate 800 can be replaced to the other side to clean the surface of the heat transfer plate 400 under the condition that the sliding block 700 reciprocatingly moves once. In this way, the two ends of the cleaning plate 800 can clean the surface of the heat transfer plate 400 in turn, and the cleaning effect of the device is improved.

[0041] In use, on the basis of Embodiment One, the sliding block 700 reciprocates in the vertical direction, thereby driving the cleaning plate 800 connected therewith to reciprocate in the vertical direction. When the cleaning plate 800 moves downward to the position of the toothed rod 1001, the tooth 1004 moves to the position of the toothed rod 1001 and is pressed by the toothed rod 1001. At this time, the tooth 1004 rotates about the torsional spring block 1003, thereby avoiding the toothed rod 1001, so that the disc 1002 does not rotate in this case. When the cleaning plate 800 moves upward after passing the toothed rod 1001, the tooth 1004 moves to the position of the toothed rod 1001 along with the cleaning plate 800, and is pressed by the toothed rod 1001. At this time, the tooth 1004 cannot rotate about the torsional spring block 1003 due to the restriction of the disc 1002, so that the disc 1002 rotates by meshing the tooth 1004 with the toothed rod 1001. The disc 1002 rotates under the action of the toothed rod 1001, so that the cleaning plate 800 fixedly connected with the disc 1002 rotates by one hundred and eighty degrees. The placing groove one 1005 in the cleaning plate 800 rotates, and the iron block 1006 in the placing groove one 1005 moves to the other side under the action of the magnetic block 1007. The magnetic block 1007 and the iron block 1006 attract each other, so that the cleaning plate 800 is maintained in a relatively stable state. In this way, the cleaning plate 800 can be replaced to the other side to clean the surface of the heat transfer plate 400 under the reciprocating movement of the sliding block 700 once.

[0042] Embodiment Three, please refer to Figures 1-8 On the basis of Embodiments One and Two, the inside of the dust collection bin 300 is provided with a vibration assembly 1100. The vibration assembly 1100 includes a rotating rod 1101 located inside the dust collection bin 300 and rotatably connected with the dust collection bin 300. The outside of the reciprocating wire rod 600 is fixedly connected with a chain wheel one 1102. The outside of the chain wheel one 1102 is fitted with a chain 1103. The outside of the rotating rod 1101 is fixedly connected with a chain wheel two 1104. The end of the chain 1103 away from the chain wheel one 1102 is fitted to the outside of the chain wheel two 1104. When the reciprocating wire rod 600 rotates, the chain wheel one 1102 fixedly connected with the reciprocating wire rod 600 rotates, and the chain wheel two 1104 connected with the chain wheel one 1102 through the chain 1103 rotates.

[0043] The outer side of the rotating rod 1101 is fixedly connected with a cam 1105, the inner side of the cam 1105 is provided with a placing groove two 1106, and the inner side of the placing groove two 1106 is assembled with a gravity block 1107. When the chain wheel two 1104 rotates, the rotating rod 1101 fixedly connected with the chain wheel two 1104 can be driven to rotate, so that the rotating rod 1101 drives the cam 1105 fixedly connected with the rotating rod 1101 to rotate. When the cam 1105 rotates, the protruding part of the cam 1105 rotates to the inner wall of the dust collecting bin 300, and the dust collecting bin 300 can be knocked and vibrate. When the protruding part of the cam 1105 slows down due to knocking the inner wall of the dust collecting bin 300, the gravity block 1107 in the cam 1105 can move under the action of inertia, so as to knock the inner wall of the placing groove two 1106. The dust collecting bin 300 is knocked twice by the placing groove two 1106 and the cam 1105, so that the dust collecting bin 300 vibrates twice. The collected dust in the dust collecting bin 300 is arranged due to vibration, and the collection efficiency of the dust collecting bin 300 is improved.

[0044] In use, on the basis of examples one and two, when the reciprocating wire rod 600 rotates, the chain wheel one 1102 fixedly connected with the reciprocating wire rod 600 can be driven to rotate, and the chain 1103 assembled on the outer side of the chain wheel one 1102 can be driven to rotate, so that the chain wheel two 1104 driven to rotate by the chain 1103 and the chain wheel one 1102 can be driven to rotate. The rotating rod 1101 fixedly connected with the chain wheel two 1104 can be driven to rotate, so that the rotating rod 1101 drives the cam 1105 fixedly connected with the rotating rod 1101 to rotate. When the cam 1105 rotates, the protruding part of the cam 1105 rotates to the inner wall of the dust collecting bin 300, and the dust collecting bin 300 can be knocked and vibrate. When the protruding part of the cam 1105 slows down due to knocking the inner wall of the dust collecting bin 300, the gravity block 1107 in the cam 1105 can move under the action of inertia, so as to knock the inner wall of the placing groove two 1106. The dust collecting bin 300 is knocked twice by the placing groove two 1106 and the cam 1105, so that the dust collecting bin 300 vibrates twice.

[0045] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A boiler tail flue heat utilization device, comprising a flue passing bin (100), a boiler water replenishing bin (200) is assembled by setting a partition plate at the top of the flue passing bin (100), a dust collecting bin (300) is assembled at the bottom of the flue passing bin (100), a heat transfer plate (400) is assembled between the flue passing bin (100) and the boiler water replenishing bin (200), a fixed seat (500) is assembled inside the flue passing bin (100), a reciprocating screw rod (600) driven by a servo motor is rotationally connected inside the fixed seat (500), a sliding block (700) is connected by setting threads at the outer side of the reciprocating screw rod (600), a cleaning plate (800) is rotationally connected at the side of the sliding block (700). characterized in that A feedwater heating assembly (900) is arranged inside the boiler water replenishing bin (200), the feedwater heating assembly (900) comprises a hydraulic bin (901), an agitating rod (902) driven by a servo motor is assembled inside the flue passing bin (100), a force rod (903) is slidingly connected at one end of the hydraulic bin (901), a gear ring (904) is slidingly connected at the other end of the hydraulic bin (901), a spring one (905) is assembled at the bottom of the force rod (903), a gear one (906) and a rotating rod (907) are rotationally connected inside the agitating rod (902), a bevel gear one (908) is drivingly connected at the bottom of the gear one (906), a bevel gear two (909) is fixedly connected at the side of the rotating rod (907), a turnover plate (910) is fixedly connected at the outer side of the rotating rod (907). A cleaning assembly (1000) is arranged inside the flue passing bin (100), the cleaning assembly (1000) comprises a toothed rod (1001), a disc (1002) is fixedly connected at the outer side of the cleaning plate (800), a tooth (1004) is rotationally connected at the outer side of the disc (1002) by setting a torsion spring block (1003), a placing groove one (1005) is formed inside the cleaning plate (800), an iron block (1006) is assembled inside the placing groove one (1005), a magnetic block (1007) is assembled inside the flue passing bin (100). A vibration assembly (1100) is arranged inside the dust collecting bin (300), the vibration assembly (1100) comprises a rotating rod (1101), a chain wheel one (1102) is fixedly connected at the outer side of the reciprocating screw rod (600), a chain (1103) is assembled at the outer side of the chain wheel one (1102), a chain wheel two (1104) is fixedly connected at the outer side of the rotating rod (1101), a cam (1105) is fixedly connected at the outer side of the rotating rod (1101), a placing groove two (1106) is formed inside the cam (1105), a gravity block (1107) is assembled inside the placing groove two (1106).

2. A boiler tail flue heat utilization device according to claim 1, characterized in that: The sliding block (700) is located inside the fixed seat (500) and is in a sliding connection state with the fixed seat (500).

3. A boiler tail flue heat utilization device according to claim 1, characterized in that: The spring one (905) is away from one end of the force bar (903) and is assembled on the inner wall of the hydraulic bin (901).

4. A boiler tail flue heat utilization device according to claim 1, characterized in that: When the water heating assembly (900) is started, the gear one (906) is engaged with the gear ring (904).

5. A boiler tail flue heat utilization device according to claim 1, characterized in that: The bevel gear two (909) is located at the side of the bevel gear one (908) and is in an engaged state with the bevel gear one (908).

6. A boiler tail flue heat utilization device according to claim 1, characterized in that: The toothed rod (1001) is located at the side of the fixed seat (500) and is in a fixed state with the fixed seat (500).

7. A boiler tail flue heat utilization device according to claim 1, characterized in that: The rotating rod (1101) is located inside the dust collecting bin (300) and is in a rotating connection state with the dust collecting bin (300).

8. A boiler backpass flue gas heat utilization device according to claim 1, characterized in that: One end of the chain (1103) away from the chain wheel one (1102) is assembled at the outer side of the chain wheel two (1104).

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