CN115325840A - Sintering flue waste heat recovery device and recovery method thereof - Google Patents

Abstract

The invention relates to the technical field of waste heat recovery of sintering flues, in particular to a device and a method for recovering waste heat of sintering flues, which comprises a support box, a plurality of vent pipes, a transfer box, a fixed pipe, a first communicating pipe, a heat conducting group, a liquid storage tank, heat storage liquid, a liquid guide pipe, a heat release pipe, a water return pipe, a circulating pump, a second communicating pipe, heat conducting oil, a rotating pipe, a support pipe, a plurality of transfer plates, extension plates, a driven wheel, a motor and a driving wheel, wherein the driving wheel and the driven wheel are connected through a connecting belt; the efficiency of its conduction heat is higher, is convenient for clear up the smoke and dust, improves the heat conduction effect.

Description

Sintering flue waste heat recovery device and recovery method thereof

Technical Field

The invention relates to the technical field of sintering flue waste heat recovery, in particular to a sintering flue waste heat recovery device and a recovery method thereof.

Background

Sintering is to convert a powdery material into a compact body, sintering is a traditional process, people use the process for producing ceramics, powder metallurgy, refractory materials, ultrahigh-temperature materials and the like for a long time, and a large amount of heat is discharged along with flue gas in the using process of sintering, so that waste is caused.

Through retrieval, a patent with patent publication number CN208704476U discloses a sintering flue waste heat recovery device and a sintering flue waste heat recovery system, and belongs to the field of waste heat utilization. The waste heat recovery device for the sintering flue comprises a tank body and at least one evaporator, wherein a cavity is formed in the tank body, the at least one evaporator is arranged in a flue gas discharge pipeline, the top and the bottom of the tank body are respectively communicated with the evaporators through steam pipes and water delivery pipes, an exhaust pipe and a water inlet pipe are further arranged on the tank body, a partition plate is arranged in the tank body, the cavity is divided into a steam cavity communicated with the steam pipes and a water storage cavity communicated with the water delivery pipes through the partition plate, and at least one heat exchange pipe communicated with the steam cavity and the water storage cavity is formed in the bottom wall of the partition plate in a protruding mode. The utility model provides a sintering flue waste heat recovery device has simple structure, uses and maintains convenient advantage, and can effectual recycle coke oven exhaust flue gas waste heat, improves energy utilization. The utility model also provides a sintering flue waste heat recovery system.

The above prior art solutions still have the following drawbacks: in the using process, the efficiency of heat conduction is low, and after the heat conduction device is used for a long time, part of smoke dust is accumulated on a heat conductor, so that the smoke dust is inconvenient to clean, and the heat conduction effect is influenced;

the existing clearing mechanism which adopts a motor to drive a hairbrush to rotate for scraping requires that a driving mechanism has bidirectional rotation capacity, for example, a bidirectional rotation motor has higher cost, can not completely scrape the unidirectional rotation motor completely, and can not effectively clear the part at the rear side when rotating relatively.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the sintering flue waste heat recovery device and the recovery method thereof, which have higher heat conduction efficiency, are convenient for cleaning smoke dust and improve the heat conduction effect.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a sintering flue waste heat recovery device comprises a support box, wherein the left end of the support box is communicated with a plurality of vent pipes, the top end and the bottom end of the support box are both connected with an adapter box, the middle part of the support box is fixedly connected with a fixed pipe, the top end and the bottom end of the fixed pipe are respectively communicated with the opposite ends of the adapter box, the outer wall of the adapter box at the upper side is communicated with a first communication pipe, the other end of the first communication pipe is communicated with a heat conduction group, the heat conduction group comprises a plurality of heat conduction rings, cavities are arranged inside the heat conduction rings, every two adjacent heat conduction rings are communicated through a plurality of connecting pipes, a liquid storage box is arranged in the middle of the heat conduction group, each heat conduction ring is sleeved on the liquid storage box, a heat storage liquid is arranged inside the liquid storage box, a liquid guide pipe is communicated with the top end of the liquid storage box, and a heat release pipe is communicated with the top end of the liquid guide pipe, the heat conduction ring on the rightmost side is communicated with the first communication pipe, the left end of the heat conduction ring on the leftmost side is communicated with a water return pipe, the bottom of the water return pipe is communicated with a circulating pump, the water outlet end of the circulating pump is communicated with a second communication pipe, the top end of the second communication pipe is communicated with the bottom end of the adapter box on the lower side, heat conduction oil is arranged in the fixed pipe, the adapter box, the first communication pipe, the second communication pipe, the water return pipe and the heat conduction ring, a rotary pipe is sleeved on the circumferential outer wall of the fixed pipe, a support pipe is sleeved on the bottom of the circumferential outer wall of the fixed pipe, the top end of the support pipe is contacted with the bottom end of the rotary pipe, a plurality of adapter plates are connected on the circumferential outer wall of the rotary pipe through screws, an extension plate is fixedly connected to the middle part of each adapter plate, a driven wheel is fixedly connected to the top end of the rotary pipe, and a motor is installed in the middle part of the top end of the support box, the output shaft end of the motor is fixedly connected with a driving wheel, the driving wheel is connected with the driven wheel through a connecting belt, the right end of the support box is communicated with an air outlet pipe, electric push rods are installed on the upper portion of the right end and the lower portion of the right end of the support box, an extension shaft is fixedly connected with the output shaft end of each electric push rod, a sliding plate is arranged inside the support box, the right end of each sliding plate is fixedly connected with the left end of each extension shaft, a plurality of brush plates are fixedly connected with the left end of each sliding plate, and each brush plate is inserted into the corresponding middle area of each extension plate.

The motor is a unidirectional rotating motor, a plurality of magnetic conductive metal blocks are arranged on the side portion, located on the rear side, of the rotating direction of the extending plate body located on the rear side in the rotating direction, the outside of the brush plate body is coated with heat insulation materials, a plurality of magnets are embedded in one side, away from the sliding plate, of the brush plate body, a plurality of bristles are fixedly connected to the top end and the bottom end of the brush plate, the front side portion and the rear side portion of the brush plate body respectively, the brush plates are horizontally hinged to be connected onto the sliding plate, a return spring is connected to the front side and the rear side of each brush plate, and the other end of the return spring is connected onto the sliding plate.

Preferably, a first electric valve is installed in the middle of each breather pipe, the left portion of breather pipe communicates with the air duct, a second electric valve is installed on the upper portion of the air duct, a temperature sensor is installed in the middle of the breather pipe, a control panel is installed on the top end of the support box, and each of the temperature sensor, the first electric valve and the second electric valve is electrically connected with the control panel.

Preferably, a plurality of bristles are fixedly connected to the top end and the bottom end of each brush plate.

Preferably, a first valve is installed in the middle of the first communicating pipe, and a second valve is installed in the middle of the second communicating pipe.

Preferably, the heat storage liquid is freon.

Preferably, the upper part and the lower part of the sliding plate are rotatably connected with rollers through shafts, and the circumferential outer wall of each roller is in contact with the inner wall of the supporting box.

Preferably, the extension plate is a copper plate.

A recovery method of a sintering flue waste heat recovery device comprises the following steps:

firstly, introducing flue gas in flues at different positions into a support box through a vent pipe, starting a circulating pump to enable heat conduction oil to flow, further enabling the heat conduction oil to drive heat at a fixed pipe to be transferred into a heat conduction ring, and transferring the heat to a liquid storage box with lower temperature through the heat conduction ring;

secondly, the heat storage liquid in the liquid storage tank absorbs part of heat after being heated;

step three, retracting the output shaft of the electric push rod, improving the contact area of the extension plate and the flue gas, and depositing smoke dust on the outer wall of the extension plate after long-time use;

and fourthly, a user extends an output shaft of the electric push rod to drive the sliding plate and the brush plate on the sliding plate to be close to a rotating path of the extension plate, the motor is started to drive the driving wheel to rotate, the driving wheel drives the driven wheel, the rotating pipe and the extension plate to rotate through a connecting belt to brush off smoke dust on the outer wall of the extension plate through the brush plate, when the extension plate rotates to be separated from the brush plate, magnetic adsorption force is generated between a magnet module in the brush plate and a magnetic conductive metal block on the rear side part of the extension plate, so that the brush plate swings and rotates in the horizontal direction to conduct side part tail sweeping and scraping on the extension plate, and when the extension plate rotates to be completely separated from the brush plate, the reset spring resets the brush plate.

(III) advantageous effects

Compared with the prior art, the invention provides a sintering flue waste heat recovery device and a recovery method thereof, and the device has the following beneficial effects:

1. the invention only needs to adopt a unidirectional rotating motor, and can clean dust at each part, especially at the rear side part, under unidirectional rotation by matching with the combined design of the end magnetic block, the horizontal hinge joint and the return spring.

2. The waste heat recovery device of the sintering flue and the recovery method thereof are characterized in that flue gas in different positions is introduced into a support box through a vent pipe, heat conducting oil flows through a circulating pump, the heat conducting oil drives heat at a fixed pipe to be transferred into a heat conducting ring, the heat is transferred to a liquid storage box with lower temperature through the heat conducting ring, heat storage liquid in the liquid storage box absorbs partial heat after being heated, the efficiency of heat conduction is improved, the output shaft of an electric push rod is retracted, the contact area of an extension plate and the flue gas is improved, after the device is used for a long time, smoke dust is deposited on the outer wall of the extension plate, the output shaft of the electric push rod stretches out through a user, a sliding plate is driven to rotate through a motor, the driving wheel drives a driven wheel through a connecting belt, the rotating pipe and the extension plate rotate to brush the smoke dust on the outer wall of the extension plate through a brush plate, the efficiency of the heat conduction is improved, the smoke dust is convenient to clean, and the heat conduction effect is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B according to the present invention;

FIG. 4 is a left side view of the connecting tube, the liquid storage tank and the heat conductive ring of the present invention;

FIG. 5 is a schematic top view of the driven and driving wheels of the present invention;

fig. 6 is a schematic top view of the fixed pipe, the adapter plate and the extension plate according to the present invention.

In the figure: 1. a support box; 2. a breather pipe; 3. a transfer box; 4. a fixed tube; 5. a first communication pipe; 6. a heat conducting ring; 7. a connecting pipe; 8. a liquid storage tank; 9. a heat storage liquid; 10. a catheter; 11. a heat releasing pipe; 12. a water return pipe; 13. a circulation pump; 14. a second communicating pipe; 15. heat conducting oil; 16. rotating the tube; 17. supporting a tube; 18. an adapter plate; 19. an extension plate; 20. a driven wheel; 21. a motor; 22. a driving wheel; 23. a connecting belt; 24. an air outlet pipe; 25. an electric push rod; 26. lengthening a shaft; 27. a sliding plate; 28. brushing the board; 29. a first electrically operated valve; 30. an air duct; 31. a second electrically operated valve; 32. a temperature sensor; 33. a control panel; 34. brushing; 35. a first valve; 36. a second valve; 37. and a roller.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-6, a sintering flue waste heat recovery device comprises a support box 1, wherein the left end of the support box 1 is communicated with a plurality of vent pipes 2, the middle part of each vent pipe 2 is provided with a first electric valve 29, the left part of each vent pipe 2 is communicated with a gas guide pipe 30, the upper part of each gas guide pipe 30 is provided with a second electric valve 31, the middle part of each vent pipe 2 is provided with a temperature sensor 32, the top end of the support box 1 is provided with a control panel 33, and each temperature sensor 32, the first electric valve 29 and the second electric valve 31 are electrically connected with the control panel 33; the temperature of the flue gas is detected through a temperature sensor 32, and after the temperature of the flue gas is sensed to be lower through the temperature sensor 32, a signal is transmitted to a control panel 33, the control panel 33 controls a first electric valve 29 to be closed, and a second electric valve 31 is opened, so that the flue gas enters a support box 1, the situation that the heat in heat conduction oil 15 is taken away by the flue gas with lower temperature is reduced, the top end and the bottom end of the support box 1 are both connected with a switching box 3, the middle part of the support box 1 is fixedly connected with a fixed pipe 4, the top end and the bottom end of the fixed pipe 4 are respectively communicated with opposite ends of the switching box 3, the outer wall of the switching box 3 at the upper side is communicated with a first communication pipe 5, the other end of the first communication pipe 5 is communicated with a heat conduction group, the heat conduction group comprises a plurality of heat conduction rings 6, cavities are arranged in the heat conduction rings 6, each two adjacent heat conduction rings 6 are communicated through a plurality of connection pipes 7, a liquid storage box 8 is arranged in the middle part of the heat conduction group, each heat conduction ring 6 is sleeved on the liquid storage box 8, the liquid storage 9 is arranged in the liquid storage box 8, and the liquid storage 9 is freon the liquid storage box; the Freon is vaporized after being heated, and then the Freon floats up to the inside of the heat release pipe 11, and contacts with the outside through the heat release pipe 11, so that heat is utilized, and the Freon becomes liquid after heat dissipation and flows into the liquid storage tank 8, so that the effect of facilitating heat conduction to a high place is achieved, the top end of the liquid storage tank 8 is communicated with the liquid guide pipe 10, the top end of the liquid guide pipe 10 is communicated with the heat release pipe 11, the rightmost heat conduction ring 6 is communicated with the first communication pipe 5, the left end of the leftmost heat conduction ring 6 is communicated with the water return pipe 12, the bottom of the water return pipe 12 is communicated with the circulating pump 13, the water outlet end of the circulating pump 13 is communicated with the second communication pipe 14, the top end of the second communication pipe 14 is communicated with the bottom end of the adapter box 3 on the lower side, the heat conduction oil fixing pipe 4, the adapter box 3, the first communication pipe 5, the second communication pipe 14, the water return pipe 12 and the heat conduction ring 6 are both provided with the heat conduction oil 15, the first valve 35 is installed in the middle part of the first communication pipe 5, and the second communication pipe 36 is installed in the middle part of the second communication pipe 14; the situation that the whole heat conducting oil 15 leaks out after the leakage at the fixed pipe 4 is reduced by opening the first valve 35 and the second valve 36 when in use and closing the first valve 35 and the second valve 36 when not in use.

The motor 21 is a unidirectional rotating motor, a plurality of magnetic conductive metal blocks are arranged on the side portion of the extending plate 19 located at the rear side in the rotating direction, the side portion of the brush plate 28 is coated with heat insulation materials, a plurality of magnets are embedded in one side of the brush plate 28, which is far away from the sliding plate 27, the top end and the bottom end of each brush plate 28 are fixedly connected with a plurality of bristles 34, the brush plates 28 are horizontally hinged to the sliding plate 27, the front side and the rear side of each brush plate 28 are connected with return springs, and the other ends of the return springs are connected to the sliding plate 27.

Further, a rotating pipe 16 is sleeved on the circumferential outer wall of the fixed pipe 4, a supporting pipe 17 is sleeved at the bottom of the circumferential outer wall of the fixed pipe 4, the top end of the supporting pipe 17 is in contact with the bottom end of the rotating pipe 16, the circumferential outer wall of the rotating pipe 16 is connected with a plurality of adapter plates 18 through screws, the middle part of each adapter plate 18 is fixedly connected with an extension plate 19, and each extension plate 19 is a copper plate; the copper plate has good heat conduction effect, so that the heat conduction effect of the extension plate 19 is improved, the driven wheel 20 is fixedly connected to the top end of the rotating tube 16, the motor 21 is installed in the middle of the top end of the support box 1, the output shaft of the motor 21 is fixedly connected with the driving wheel 22, the driving wheel 22 is connected with the driven wheel 20 through the connecting band 23, the driving wheel 22 and the driven wheel 20 are both belt pulleys, the connecting band 23 is a belt, the right end of the support box 1 is communicated with the air outlet pipe 24, the upper portion and the lower portion of the right end of the support box 1 are both provided with the electric push rod 25, the output shaft of the electric push rod 25 is fixedly connected with the lengthened shaft 26, the support box 1 is internally provided with the sliding plate 27, the upper portion and the lower portion of the sliding plate 27 are both rotatably connected with the rollers 37 through shafts, and the circumferential outer walls of the rollers 37 are both contacted with the inner wall of the support box 1; through the rolling of the roller 37, the sliding plate 27 is replaced to directly rub with the supporting box 1, the smoothness of sliding is improved, the right end of the sliding plate 27 is fixedly connected with the left end of each lengthened shaft 26, the left end of the sliding plate 27 is fixedly connected with a plurality of brush plates 28, each brush plate 28 is inserted into the corresponding middle area of each corresponding two extending plates 19, the top end and the bottom end of each brush plate 28 are fixedly connected with a plurality of brush hairs 34, and each brush hair 34 is tightly attached to each corresponding extending plate 19; the extension plate 19 is brushed by the bristles 34, so that the brushing effect is improved; through letting in the inside flue gas of flue through breather pipe 2 with different places inside supporting box 1, make conduction oil 15 produce through circulating pump 13 and flow, and then make conduction oil 15 drive the heat transfer of fixed pipe 4 department to in the heat conduction ring 6, through heat conduction ring 6 with heat transfer for lower liquid reserve tank 8 of temperature, the inside heat-retaining liquid 9 of liquid reserve tank 8 absorbs partial heat after being heated, improve the efficiency of conducting heat, withdraw through the output shaft that makes electric putter 25, improve the area of contact of extension board 19 and flue gas, treat long-time after using, the outer wall deposit of extension board 19 has the smoke and dust, make electric putter 25's output shaft stretch out through the user, and then drive sliding plate 27, it is rotatory to drive action wheel 22 through motor 21, action wheel 22 drives from driving wheel 20 through connecting band 23, rotatory pipe 16 and extension board 19 are rotatory to brush the smoke and dust of removing extension board 19 through brush board 28, and then improve the efficiency of conducting heat, be convenient for clearing up the smoke and dust, improve the heat conduction effect.

A recovery method of a sintering flue waste heat recovery device comprises the following steps:

firstly, introducing flue gas in flues at different positions into a support box 1 through a vent pipe 2, starting a circulating pump 13 to enable heat conduction oil 15 to flow, further enabling the heat conduction oil 15 to drive heat at a fixed pipe 4 to be transferred into a heat conduction ring 6, and transferring the heat to a liquid storage box 8 with lower temperature through the heat conduction ring 6; the heat conduction rings 6 are sleeved on the liquid storage tank 8, so that heat can be conveniently transferred.

Secondly, absorbing part of heat after the heat storage liquid 9 in the liquid storage tank 8 is heated;

step three, retracting the output shaft of the electric push rod 25, improving the contact area of the extension plate 19 and the flue gas, and depositing smoke dust on the outer wall of the extension plate 19 after long-time use;

step four, the user extends the output shaft of the electric push rod 25 to drive the sliding plate 27 and the brush plate 28 thereon to approach the rotating path of the extension plate 19, the motor 21 is started, the motor 21 drives the driving wheel 22 to rotate, the driving wheel 22 drives the driven wheel 20, the rotating pipe 16 and the extension plate 19 to rotate through the connecting belt 23 to brush off the smoke dust on the outer wall of the extension plate 19 through the brush plate 28, wherein when the extension plate 19 rotates to be separated from the brush plate 28, a magnetic adsorption force is generated between the magnet module in the brush plate 28 and the magnetic conductive metal block on the rear side part of the extension plate 19, so that the brush plate 28 swings and rotates in the horizontal direction to perform side-part tail-sweeping and scraping on the extension plate 19, and when the extension plate 19 rotates to be completely separated from the brush plate 28, the return spring returns the brush plate 28; the driving wheel 22 and the driven wheel 20 are driven by the motor 21 to rotate, so that the power part is arranged outside, the maintenance is convenient for a user, and the interference between the motor 21 and the fixed pipe 4 is reduced by changing the rotating position.

In summary, when the device and the method for recovering the waste heat of the sintering flue are used, firstly, smoke in the flue at different positions is introduced into the supporting box 1 through the vent pipe 2, the circulating pump 13 is started, the heat conduction oil 15 flows, the heat conduction oil 15 drives the heat at the fixed pipe 4 to be transferred into the heat conduction ring 6, and the heat is transferred to the liquid storage box 8 with lower temperature through the heat conduction ring 6; through the form of a plurality of 6 suits of heat conduction rings at liquid reserve tank 8, be convenient for thermal transmission, the inside heat-retaining liquid 9 of liquid reserve tank 8 absorbs partial heat after being heated, make electric putter 25's output shaft withdraw, improve the area of contact of extension board 19 and flue gas, treat long-time back of using, the outer wall deposit of extension board 19 has the smoke and dust, later the user makes electric putter 25's output shaft stretch out, and then drive sliding plate 27 starter motor 21, motor 21 drives the action wheel 22 rotatory, action wheel 22 drives from driving wheel 20 through connecting band 23, the rotatory pipe 16 and the rotatory smoke and dust of the outer wall of extension board 19 of brushing off through brush board 28 of extension board 19.

The model of the motor 21 is YVF2-63M1-4, the model of the electric push rod 25 is DT500, the model of the temperature sensor 32 is PT100, the model of the first electric valve 29 is D971X-16Q, the model of the second electric valve 31 is Q941F-16P, the model of the circulating pump 13 is ISG25-125, and the model of the control panel 33 is JZ-20, wherein the motor 21, the electric push rod 25, the temperature sensor 32, the first electric valve 29, the second electric valve 31 and the circulating pump 13 are all known devices directly purchased from the market and are well known by technicians in the field, and the device is used only and is not structurally and functionally improved, and detailed description is omitted.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a sintering flue waste heat recovery device which characterized in that: comprises a supporting box (1), the left end of the supporting box (1) is communicated with a plurality of vent pipes (2), the top end and the bottom end of the supporting box (1) are both connected with an adapter box (3), the middle part of the supporting box (1) is fixedly connected with a fixed pipe (4), the top end and the bottom end of the fixed pipe (4) are respectively communicated with the opposite ends of the adapter box (3), the outer wall of the adapter box (3) at the upper side is communicated with a first communicating pipe (5), the other end of the first communicating pipe (5) is communicated with a heat conducting group, the heat conducting group comprises a plurality of heat conducting rings (6), the inside of each heat conducting ring (6) is provided with a cavity, every two adjacent heat conducting rings (6) are communicated with each other through a plurality of connecting pipes (7), the middle part of the heat conducting group is provided with a liquid storage box (8), each heat conducting ring (6) is sleeved on the liquid storage box (8), the inside of the liquid storage tank (8) is provided with a heat storage liquid (9), the top end of the liquid storage box (8) is communicated with a liquid guide pipe (10), the top end of the heat pipe (10) is communicated with a second communicating pipe (6), the liquid storage pipe (6) at the right side, the first communicating pipe (6) is communicated with a second communicating pipe (12), the bottom of the liquid storage pipe (6) and a water return pipe (12), the top end of the second communicating pipe (14) is communicated with the bottom end of the junction box (3) on the lower side, heat conduction oil (15) is arranged in the fixed pipe (4), the junction box (3), the first communicating pipe (5), the second communicating pipe (14), the water return pipe (12) and the heat conduction ring (6), a rotating pipe (16) is sleeved on the outer circumferential wall of the fixed pipe (4), a supporting pipe (17) is sleeved on the bottom of the outer circumferential wall of the fixed pipe (4), the top end of the supporting pipe (17) is in contact with the bottom end of the rotating pipe (16), a plurality of junction plates (18) are connected to the outer circumferential wall of the rotating pipe (16) through screws, an extending plate (19) is fixedly connected to the middle portion of each junction plate (18), a driven wheel (20) is fixedly connected to the top end of the rotating pipe (16), a motor (21) is installed in the middle of the top end of the supporting box (1), an output shaft end of the motor (21) is fixedly connected with a driving wheel (22), the driving wheel (22) is connected with the driven wheel (20) through a connecting belt (23), an air outlet pipe (24) is fixedly connected to the right end of the supporting box (1), and an electric push rod (25) is installed on the lower end of the push rod (25), a sliding plate (27) is arranged in the support box (1), the right end of the sliding plate (27) is fixedly connected with the left end of each lengthened shaft (26), the left end of the sliding plate (27) is connected with a plurality of brush plates (28), and each brush plate (28) is inserted into the relative middle area of each corresponding two extending plates (19);

the motor (21) is a unidirectional rotating motor, a plurality of magnetic conductive metal blocks are arranged on the side portion, located on the rear side, of the plate body of the extending plate (19) located on the rear side in the rotating direction, heat insulation materials are coated outside the plate body of the brush plate (28), a plurality of magnets are embedded in one side, far away from the sliding plate (27), of the plate body of the brush plate (28), a plurality of bristles (34) are fixedly connected to the top end and the bottom end of each brush plate (28) and the front side portion and the rear side portion of each brush plate (28), the brush plates (28) are horizontally hinged to the sliding plate (27), return springs are connected to the front side and the rear side of each brush plate (28), and the other ends of the return springs are connected to the sliding plate (27).

2. The device for recovering the waste heat of the sintering flue as claimed in claim 1, wherein: each first electric valve (29) is installed at the middle part of breather pipe (2), the left part intercommunication of breather pipe (2) has air duct (30), second electric valve (31) is installed on the upper portion of air duct (30), the mid-mounting of breather pipe (2) has temperature sensor (32), control panel (33) are installed on the top of supporting box (1), each temperature sensor (32), first electric valve (29) and second electric valve (31) all with control panel (33) electricity is connected.

3. The device for recovering the waste heat of the sintering flue as claimed in claim 2, wherein: each brush hair (34) is made of hard thin rod-shaped plastic material.

4. The sintering flue waste heat recovery device of claim 3, characterized in that: a first valve (35) is installed in the middle of the first communicating pipe (5), and a second valve (36) is installed in the middle of the second communicating pipe (14).

5. The device for recovering the waste heat of the sintering flue as claimed in claim 4, wherein: the heat storage liquid (9) is freon.

6. The device for recovering the waste heat of the sintering flue as claimed in claim 5, wherein: the upper part and the lower part of the sliding plate (27) are rotatably connected with rollers (37) through shafts, and the circumferential outer wall of each roller (37) is contacted with the inner wall of the supporting box (1).

7. The device for recovering the waste heat of the sintering flue as claimed in claim 6, wherein: the extension plate (19) is a copper plate.

8. The recovery method of the sintering flue waste heat recovery device according to any one of claims 1 to 7, characterized by comprising the following steps:

firstly, smoke inside flues at different positions is introduced into a support box (1) through a vent pipe (2), a circulating pump (13) is started to enable heat conduction oil (15) to flow, so that the heat conduction oil (15) drives heat at a fixed pipe (4) to be transferred into a heat conduction ring (6), and the heat is transferred to a liquid storage box (8) with lower temperature through the heat conduction ring (6);

secondly, absorbing partial heat after the heat storage liquid (9) in the liquid storage tank (8) is heated;

step three, retracting an output shaft of the electric push rod (25), increasing the contact area of the extension plate (19) and the flue gas, and depositing smoke dust on the outer wall of the extension plate (19) after long-time use;

and fourthly, extending an output shaft of the electric push rod (25) by a user to drive the sliding plate (27) and the brush plate (28) on the sliding plate to be close to a rotating path of the extension plate (19), starting the motor (21), driving the driving wheel (22) to rotate by the motor (21), driving the driven wheel (20), the rotating pipe (16) and the extension plate (19) to rotate through the connecting belt (23) to brush off smoke dust on the outer wall of the extension plate (19) through the brush plate (28), wherein when the extension plate (19) rotates to be separated from the brush plate (28), magnetic adsorption force is generated between a magnet module in the brush plate (28) and a magnetic conductive metal block on the rear side part of the extension plate (19), so that the brush plate (28) swings and rotates in the horizontal direction to scrape the tail of the extension plate (19), and when the extension plate (19) rotates to be completely separated from the brush plate (28), the return spring returns the brush plate (28).

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