System for recycling flue gas waste heat through rotating wheel

Abstract

The utility model belongs to the technical field of energy recovery, and particularly relates to a system for recovering flue gas waste heat through a rotating wheel. Comprising a front filtering device, the front filtering device is used for filtering smoke particles and tobacco tar in smoke and comprises a shell and a filter element, the shell is provided with a first air inlet and a first air outlet, and the first air inlet is connected with a smoke inlet pipe; the rotating wheel device is used for dehumidifying the filtered flue gas and comprises a shell and a rotating wheel, the shell is provided with a second air inlet, a second air outlet and a fresh air inlet, and the second air inlet communicates with the first air outlet through a first connecting pipe; the rotating wheel device is provided with an upper dehumidification area and a lower air return area, the second air inlet and the second air outlet are aligned to the upper dehumidification area, the fresh air inlet is aligned to the lower air return area, the second air outlet is communicated with a main air outlet pipe, and the main air outlet pipe is used for conveying dehumidified flue gas for other recycling purposes; the system can filter smoke particles and tobacco tar in smoke, dehumidify the smoke and recycle waste heat of the smoke.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the energy recovery technical field especially relates to a system recycling flue gas waste heat with runner. BACKGROUND

[0002] The flue gas generated in the cigarette rolling process is discharged into the atmosphere after being treated by the peculiar smell treatment equipment and passing environmental protection detection.

[0003] For example, the Chinese utility model patent with the application number 202122015355.6 discloses a hot air peculiar smell removal device for cigarette silk processing, which comprises an exhaust pipe and a plasma deodorization main body. The plasma deodorization main body is connected with a connecting pipe. The connecting pipe is connected into the pipe through a filtering and cooling device. The filtering and cooling device comprises a filtering mechanism and a cooling mechanism. A vibrating motor is installed on one side of the filtering box of the filtering mechanism. A filter screen is inserted into the inside of the filtering box through a socket. The bottom of the filtering box is fixedly installed with a storage mechanism through a spring and a longitudinally arranged connecting plate on the cooling mechanism.

[0004] However, the high-temperature and high-humidity flue gas is not conducive to the water washing treatment in the peculiar smell removal system. The peculiar smell removal process is relatively complicated. The low-temperature and low-humidity flue gas is more conducive to the water washing treatment in the peculiar smell removal system. Meanwhile, the waste heat of the flue gas is not well recycled and utilized, which causes a large amount of energy waste to a certain extent. UTILITY MODEL CONTENT

[0005] The utility model aims at the above-mentioned technical problems and provides a system recycling flue gas waste heat with runner, which achieves the effects of filtering smoke dust particles and tobacco tar in the flue gas, dehumidifying the flue gas, and recycling the waste heat of the flue gas.

[0006] Therefore, the utility model provides a system recycling flue gas waste heat with runner, which comprises:

[0007] A pre-filtering device is used for filtering smoke dust particles and tobacco tar in the flue gas and comprises a shell and a filter core. The shell is provided with a first air inlet and a first air outlet. The first air inlet is connected with a flue gas inlet pipe.

[0008] A runner device is used for dehumidifying the filtered flue gas and comprises a shell and a runner. The shell is provided with a second air inlet, a second air outlet, and a fresh air inlet. The second air inlet is communicated with the first air outlet through a first connecting pipe.

[0009] The runner device has an upper dehumidification zone and a lower return air zone. The second air inlet and the second air outlet are aligned with the upper dehumidification zone. The fresh air inlet is aligned with the lower return air zone. The second air outlet is communicated with a main air outlet pipe. The main air outlet pipe is used for conveying the dehumidified flue gas for other purposes.

[0010] In the technical solution, the pre-filtering device can filter smoke dust particles and tobacco tar in the flue gas, avoid the attachment of the smoke dust particles and the tobacco tar to the rotating device (cleaning of the rotating device is more complicated), and can be regularly replaced and cleaned; the rotating device can dehumidify the flue gas, facilitate water washing treatment of the flue gas in a subsequent odor system, the fresh air inlet is used to send fresh air to the lower return air area; the main air outlet pipe is used to transport the dehumidified flue gas for other recycling purposes, and the waste heat of the flue gas is recycled and utilized.

[0011] Further, the shell and the filter element are detachably connected.

[0012] The shell is provided with a plurality of insertion slots, each of which is provided with a filter element, and the filter element has a filter layer.

[0013] The upper and lower inner walls of the insertion slot are provided with a plurality of positioning grooves, and the upper and lower sides of the filter element are detachably provided with positioning blocks which can be inserted into the positioning grooves.

[0014] Further, the positioning grooves are semispherical, and the positioning blocks are spherical.

[0015] The upper and lower sides of the filter element are provided with grooves aligned with the positioning grooves, and a vertical box is inserted into the grooves, and the vertical box is provided with a cover plate.

[0016] The positioning blocks are located in the vertical box, the cover plate is provided with a circular hole with a diameter smaller than that of the positioning blocks, to prevent the positioning blocks from falling out, a spring is arranged between the bottom of the vertical box and the positioning blocks to move the positioning blocks towards the circular hole, the cover plate is detachably connected to the filter element by a plurality of countersunk head bolts, and the outer end surface of the cover plate is flush with the outer end surface of the filter element.

[0017] Further, the filter element is provided with a handle on the outside, and the filter layer is a folded or wavy filter cloth.

[0018] Further, the fresh air inlet is connected with a heater, and the rotating wheel is driven by a motor.

[0019] The shell is provided with a return air pipe aligned with the lower return air area, the other end of the return air pipe is communicated with the flue gas inlet pipe, and is used for secondary filtration and secondary dehumidification of the flue gas.

[0020] Further, the flue gas inlet pipe is provided with a valve, and the main air outlet pipe and the return air pipe are each provided with a fan.

[0021] Further, the main air outlet pipe is communicated with a heat exchanger through a first branch pipe, and the first branch pipe is provided with a valve.

[0022] The lower part of the heat exchanger is provided with a first water inlet pipe, and the upper part is provided with a first water outlet pipe, the heat exchanger is provided with a heat exchange coil pipe which is communicated with the first water inlet pipe and the first water outlet pipe, and the lower end of the heat exchanger is provided with a first air outlet pipe.

[0023] Further, the main air outlet pipe is communicated with a steam boiler through a second branch pipe, the second branch pipe is provided with a valve, and the steam boiler is provided with a steam outlet pipe.

[0024] Further, the main air outlet pipe is communicated with a plate heat exchanger through a third branch pipe, the third branch pipe is provided with a valve, and the plate heat exchanger is provided with a second water inlet pipe, a second water outlet pipe and a second gas outlet pipe.

[0025] The utility model discloses beneficial effect is:

[0026] 1. The prefiltering device can filter smoke dust particles and tobacco tar in flue gas, avoid the adhesion of smoke dust particles and tobacco tar to the rotary device (the cleaning of the rotary device is more complicated), and can be replaced and cleaned regularly, the rotary device can dehumidify flue gas, facilitate the water washing treatment of flue gas in the subsequent odor system, the fresh air inlet is used for sending fresh air to the lower return air area, the main air outlet pipe is used for conveying the dehumidified flue gas for other recycling purposes, and the waste heat of flue gas is recycled and utilized.

[0027] 2. The arrangement of multiple slots and filter elements enables the prefiltering device to filter more smoke dust particles and tobacco tar, so as to prevent the adhesion of smoke dust particles and tobacco tar to the rotary device, greatly shorten the cleaning period of the rotary device, facilitate the subsequent odor treatment of flue gas, and additionally, the filter element and the shell are detachably connected through positioning blocks and slots, the filter element can be replaced, the filter element will not easily fall out, and the structure is more stable.

[0028] 3. The positioning groove in the shape of a hemisphere and the positioning block in the shape of a sphere enable the filter element and the shell to have a positioning structure and reduce the friction resistance during assembly and disassembly, facilitate the assembly and disassembly of the filter element, when the filter element is pushed into the slot to the right position, the positioning block is pushed into the positioning groove under the action of the spring force, the positioning of the filter element and the shell is completed, the outer end surface of the cover plate is flush with the outer end surface of the filter element, and the filter element is more smooth during assembly and disassembly.

[0029] 4. The arrangement of the handle facilitates the pushing and pulling of the filter element, and facilitates the assembly and disassembly, the filter layer is filter cloth in the shape of a fold or a wave, the filter layer has a larger surface area, and can filter more smoke dust particles and tobacco tar.

[0030] 5. The arrangement of the return air pipe can convey fresh air and flue gas in the return air area into the flue gas inlet pipe, perform secondary filtration and secondary dehumidification on the flue gas, and facilitate the subsequent treatment of the flue gas.

[0031] 6. The dehumidified flue gas can enter the heat exchanger through the first branch pipe, be used for heating normal-temperature water, the heated hot water is discharged through the first water outlet pipe and conveyed to corresponding hot water equipment, the flue gas is not only cooled, but also used for other recycling purposes, the energy utilization rate is greatly improved, and additionally, the flue gas discharged from the first gas outlet pipe is low-temperature and low-humidity flue gas, which is more conducive to the water washing treatment in the odor system.

[0032] 7. The dehumidified flue gas can enter the steam boiler through the second branch pipe, the waste heat can be converted into high-pressure steam through the steam boiler, and then sent to the corresponding heat-using equipment through the steam outlet pipe, so that the energy utilization rate is improved.

[0033] 8. The dehumidified flue gas can enter the plate heat exchanger through the third branch pipe, the plate heat exchanger can realize heat exchange of medium-temperature hot air, and then the second air outlet pipe is sent to other heat-using equipment, so that the energy utilization rate is improved.

[0034] The cigarette factory can control the opening of the corresponding first branch pipe and / or second branch pipe and / or third branch pipe according to the amount and temperature of the flue gas and the use of other heat-using water or heat-using equipment, so as to realize different uses under different conditions, and the applicability is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is the system structure principle diagram of the utility model;

[0036] Figure 2 is the internal structure schematic view of the pre-filtering device in the utility model;

[0037] Figure 3 is Figure 2 the enlarged view of A in the utility model;

[0038] Figure 4 is the cross-sectional structure schematic view of the filter element in the utility model;

[0039] The mark in the figure represents:

[0040] 1, pre-filtering device; 2, shell; 3, filter element; 4, first air inlet; 5, first air outlet; 6, flue gas inlet pipe; 7, rotating device; 8, shell; 9, second air inlet; 10, second air outlet; 11, fresh air inlet; 12, first connecting pipe; 13, main air outlet pipe; 15, slot; 16, filter layer; 17, positioning groove; 18, positioning block; 19, groove; 20, vertical box; 21, cover plate; 22, round hole; 23, spring; 24, countersunk bolt; 25, handle; 26, heater; 27, return air pipe; 28, valve; 29, fan; 30, first branch pipe; 31, heat exchanger; 32, first water inlet pipe; 33, first water outlet pipe; 34, first air outlet pipe; 35, second branch pipe; 36, steam boiler; 37, steam outlet pipe; 38, third branch pipe; 39, plate heat exchanger; 40, second water inlet pipe; 41, second water outlet pipe; 42, second air outlet pipe. DETAILED DESCRIPTION

[0041] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0042] In the description of the present application, it should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship. The technology, methods and devices known to those skilled in the art can not be discussed in detail, but in appropriate cases, the technology, methods and devices should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0043] Embodiment 1:

[0044] The present embodiment provides a system for recycling flue gas waste heat by using a rotating wheel, comprising:

[0045] The pre-filtering device 1 is used for filtering smoke dust particles and smoke oil in the flue gas, comprising a shell 2 and a filter core 3, the shell 2 has a first air inlet 4 and a first air outlet 5, the first air inlet 4 is connected to a flue gas inlet pipe 6;

[0046] The rotating wheel device 7 is used for dehumidifying the filtered flue gas, comprising a shell 8 and a rotating wheel, the shell 8 has a second air inlet 9, a second air outlet 10 and a fresh air inlet 11, the second air inlet 9 is communicated with the first air outlet 5 through a first connecting pipe 12;

[0047] Wherein, the rotating wheel device 7 has an upper dehumidification zone and a lower return air zone, the second air inlet 9 and the second air outlet 10 are aligned with the upper dehumidification zone, the fresh air inlet 11 is aligned with the lower return air zone, the second air outlet 10 is communicated with a main air outlet pipe 13, the main air outlet pipe 13 is used for conveying the dehumidified flue gas for other purposes.

[0048] In the embodiment, the pre-filtering device 1 can filter the smoke dust particles and the tobacco tar in the flue gas, avoid the smoke dust particles and the tobacco tar from adhering to the rotary device 7 (the cleaning of the rotary device 7 is more complicated), and can be replaced and cleaned regularly. The rotary device 7 can dehumidify the flue gas, facilitate the water washing treatment of the flue gas in the subsequent odor system, the fresh air inlet 11 is used for sending fresh air to the lower return air area, and the main air outlet pipe 13 is used for conveying the dehumidified flue gas for other recycling purposes, and the waste heat of the flue gas is recycled and utilized.

[0049] Embodiment 2

[0050] The embodiment provides a system for recycling waste heat of flue gas by using a rotary device, in addition to the technical solutions of the above-mentioned embodiments, further comprising the following technical features.

[0051] The shell 2 and the filter element 3 are detachably connected;

[0052] The shell 2 is provided with a plurality of insertion grooves 15, and each insertion groove 15 is provided with a filter element 3, and the filter element 3 has a filter layer 16;

[0053] The upper and lower inner walls of the insertion groove 15 are provided with a plurality of positioning grooves 17, and the upper and lower sides of the filter element 3 are detachably provided with positioning blocks 18 which can be inserted into the positioning grooves 17.

[0054] In the embodiment, the plurality of insertion grooves 15 and the filter element 3 can filter more smoke dust particles and tobacco tar, so as to prevent the smoke dust particles and the tobacco tar from adhering to the rotary device 7, greatly shorten the cleaning period of the rotary device 7, facilitate the subsequent odor treatment of the flue gas, and facilitate the replacement of the filter element 3. The filter element 3 will not easily fall out, and the structure is more stable.

[0055] Embodiment 3

[0056] The embodiment provides a system for recycling waste heat of flue gas by using a rotary device, in addition to the technical solutions of the above-mentioned embodiments, further comprising the following technical features.

[0057] The positioning groove 17 is semispherical, and the positioning block 18 is spherical;

[0058] The upper and lower sides of the filter element 3 are provided with grooves 19 which are aligned with the positioning grooves 17, a vertical box 20 is inserted into the groove 19, and the vertical box 20 is provided with a cover plate 21;

[0059] The positioning block 18 is located in the vertical box 20, the cover plate 21 is provided with a circular hole 22 with a diameter smaller than that of the positioning block 18, so as to prevent the positioning block 18 from falling out, a spring 23 is arranged between the bottom of the vertical box 20 and the positioning block 18, and the spring 23 is used to move the positioning block 18 to the direction of the circular hole 22, the cover plate 21 is detachably connected with the filter core 3 through a plurality of countersunk head bolts 24, and the outer end surface of the cover plate 21 is flush with the outer end surface of the filter core 3.

[0060] In the embodiment, the semispherical positioning groove 17 and the spherical positioning block 18 not only have a positioning structure, but also reduce the frictional resistance during assembly and disassembly, so that the assembly and disassembly of the filter core 3 are facilitated, when the filter core 3 is pushed into the insertion slot 15 to a position, the positioning block 18 is pushed into the positioning groove 17 under the action of the spring 23, so that the positioning of the filter core 3 and the shell 2 is completed, and the outer end surface of the cover plate 21 is flush with the outer end surface of the filter core 3, so that the assembly and disassembly of the filter core 3 are more smooth.

[0061] Embodiment 4:

[0062] The embodiment provides a system for recycling waste heat of flue gas by using a rotating wheel, in addition to the technical solutions of the above embodiments, has the following technical features.

[0063] The filter core 3 is provided with a handle 25, the filter layer 16 is a folded or wavy filter cloth, the fresh air inlet 11 is connected with a heater 26, and the rotating wheel is driven by a motor.

[0064] In the embodiment, the handle 25 facilitates the pushing and pulling of the filter core 3, and facilitates the assembly and disassembly, the filter layer 16 is a folded or wavy filter cloth, so that the filter layer 16 has a larger surface area and can filter more smoke dust particles and tobacco tar.

[0065] Embodiment 5:

[0066] The embodiment provides a system for recycling waste heat of flue gas by using a rotating wheel, in addition to the technical solutions of the above embodiments, has the following technical features.

[0067] The shell 8 is provided with a return air pipe 27 aligned with the lower return air area, one end of the return air pipe 27 is communicated with the flue gas inlet pipe 6, and the other end of the return air pipe 27 is communicated with the flue gas inlet pipe 6, for secondary filtration and secondary dehumidification of the flue gas, the flue gas inlet pipe 6 is provided with a valve 28, and the main air outlet pipe 13 and the return air pipe 27 are both provided with a fan 29.

[0068] In the embodiment, the return air pipe 27 can transport the fresh air and the flue gas in the return air area into the flue gas inlet pipe 6, so as to perform secondary filtration and secondary dehumidification on the flue gas, and facilitate subsequent processing of the flue gas.

[0069] Embodiment 6:

[0070] The embodiment provides a system for recycling waste heat of flue gas by using a rotating wheel.

[0071] The main air outlet pipe 13 is communicated with the heat exchanger 31 through the first branch pipe 30, and the first branch pipe 30 is provided with a valve 28.

[0072] The lower part of the heat exchanger 31 is provided with the first water inlet pipe 32, the upper part is provided with the first water outlet pipe 33, the heat exchanger 31 is provided with a heat exchange coil pipe communicating the first water inlet pipe 32 and the first water outlet pipe 33, and the lower end of the heat exchanger 31 is provided with the first gas outlet pipe 34.

[0073] In the embodiment, the flue gas after dehumidification can enter the heat exchanger 31 through the first branch pipe 30, and is used for heating normal temperature water, the heated hot water is discharged through the first water outlet pipe 33 and is delivered to corresponding water heating equipment, the flue gas is cooled, and the waste heat of the flue gas is used for other recycling purposes, so that the energy utilization rate is greatly improved, and in addition, the flue gas discharged from the first gas outlet pipe 34 is low-temperature and low-humidity flue gas, which is more conducive to water washing treatment in an odor system.

[0074] Embodiment 7:

[0075] The embodiment provides a system for recycling waste heat of flue gas by using a rotating wheel, and has the following technical features in addition to the technical solutions of the above embodiments.

[0076] The main air outlet pipe 13 is communicated with the steam boiler 36 through the second branch pipe 35, the second branch pipe 35 is provided with a valve 28, and the steam boiler 36 is provided with a steam outlet pipe 37.

[0077] In the embodiment, the flue gas after dehumidification can enter the steam boiler 36 through the second branch pipe 35, the waste heat can be converted into high-pressure steam through the steam boiler 36, and then is sent to corresponding heat using equipment through the steam outlet pipe 37, so that the energy utilization rate is improved.

[0078] Embodiment 8:

[0079] The embodiment provides a system for recycling waste heat of flue gas by using a rotating wheel, and has the following technical features in addition to the technical solutions of the above embodiments.

[0080] The main air outlet pipe 13 is communicated with the plate heat exchanger 39 through the third branch pipe 38, the third branch pipe 38 is provided with a valve 28, and the plate heat exchanger 39 is provided with the second water inlet pipe 40, the second water outlet pipe 41 and the second gas outlet pipe 42.

[0081] In the embodiment, the dehumidified flue gas can enter the plate heat exchanger 39 through the third branch pipe 38, and the plate heat exchanger 39 can exchange the medium-temperature hot air, and then the second gas outlet pipe 42 can send the medium-temperature hot air to other heat-using equipment, so as to improve the energy utilization rate.

[0082] The cigarette factory can control the corresponding valve 28 to open the corresponding first branch pipe 30 and / or the second branch pipe 35 and / or the third branch pipe 38 according to the amount and temperature of the flue gas and the use of the hot water or the heat-using equipment, so as to realize different uses in different conditions, and the applicability is stronger.

[0083] The embodiments of the application are described above in combination with the drawings, the embodiments in the application and the features in the embodiments can be combined with each other without conflict, the application is not limited to the above specific embodiments, the above specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the application without departing from the scope of the application and the protection scope of the claims, and all the forms belong to the protection scope of the application.

Claims

1. A system for recovering waste heat from flue gases using a runner, characterized in that , comprising: A pre-filtering device (1) for filtering smoke dust particles and oil in flue gas, comprising a shell (2) and a filter core (3), the shell (2) has a first air inlet (4) and a first air outlet (5), the first air inlet (4) is connected with a flue gas inlet pipe (6); A rotating wheel device (7) for dehumidifying the flue gas after filtering, comprising a shell (8) and a rotating wheel, the shell (8) has a second air inlet (9), a second air outlet (10) and a fresh air inlet (11), the second air inlet (9) is communicated with the first air outlet (5) through a first connecting pipe (12); Wherein, the rotating wheel device (7) has an upper dehumidification area and a lower return air area, the second air inlet (9) and the second air outlet (10) are aligned with the upper dehumidification area, the fresh air inlet (11) is aligned with the lower return air area, and the second air outlet (10) is communicated with a main air outlet pipe (13), the main air outlet pipe (13) is used to transport the dehumidified flue gas for other recycling purposes.

2. The system for recovering waste heat from flue gas using a rotating wheel according to claim 1, wherein, The shell (2) and the filter core (3) can be detachably connected; The shell (2) is provided with a plurality of insertion slots (15), each of which is inserted with a filter core (3), and the filter core (3) has a filter layer (16); Wherein, the upper and lower inner walls of the insertion slot (15) are provided with a plurality of positioning grooves (17), and the upper and lower sides of the filter core (3) are detachably provided with positioning blocks (18) which can be inserted into the positioning grooves (17).

3. The system for recovering waste heat from flue gas using a rotating wheel according to claim 2, wherein, The positioning grooves (17) are semispherical, and the positioning blocks (18) are spherical; The upper and lower sides of the filter core (3) are provided with grooves (19) aligned with the positioning grooves (17), and vertical boxes (20) are inserted into the grooves (19), and the vertical boxes (20) are provided with cover plates (21); Wherein, the positioning blocks (18) are located in the vertical boxes (20), the cover plates (21) are provided with circular holes (22) with a diameter smaller than that of the positioning blocks (18), which prevent the positioning blocks (18) from falling out, springs (23) are arranged between the bottoms of the vertical boxes (20) and the positioning blocks (18) to move the positioning blocks (18) towards the circular holes (22), the cover plates (21) are detachably connected with the filter core (3) through a plurality of countersunk head bolts (24), and the outer end faces of the cover plates (21) are flush with the outer end faces of the filter core (3).

4. The system for recovering waste heat from flue gas using a rotating wheel according to claim 3, characterized in that, The filter core (3) is provided with a handle (25) on the outside, and the filter layer (16) is a folded or wavy filter cloth.

5. The system for recovering waste heat from flue gas using a rotating wheel according to any one of claims 1-4, characterized in that, The fresh air inlet (11) is connected with a heater (26), and the rotating wheel is driven by a motor; The shell (8) is provided with a return air pipe (27) aligned with the lower return air area, the other end of the return air pipe (27) is communicated with the flue gas inlet pipe (6), which is used for secondary filtering and dehumidifying of the flue gas.

6. The system for recovering waste heat from flue gas using a rotating wheel according to claim 5, wherein, Valves (28) are arranged on the flue gas inlet pipe (6), and fans (29) are arranged on the main air outlet pipe (13) and the return air pipe (27).

7. The system for recovering waste heat from flue gas using a rotating wheel according to any one of claims 1-4, characterized in that, The main air outlet pipe (13) is communicated with a heat exchanger (31) through a first branch pipe (30), and valves (28) are arranged on the first branch pipe (30); The heat exchanger (31) is provided with a first water inlet pipe (32) at the lower part and a first water outlet pipe (33) at the upper part, and is provided with a heat exchange coil communicating with the first water inlet pipe (32) and the first water outlet pipe (33) in the heat exchanger (31), and is provided with a first gas outlet pipe (34) at the lower end.

8. The system for recovering waste heat from flue gas using a rotating wheel according to any one of claims 1-4, characterized in that, The main air outlet pipe (13) is communicated with a steam boiler (36) through a second branch pipe (35), and the second branch pipe (35) is provided with a valve (28), and the steam boiler (36) is provided with a steam outlet pipe (37).

9. The system for recovering waste heat from flue gas using a rotating wheel according to any one of claims 1-4, characterized in that, The main air outlet pipe (13) is communicated with a plate heat exchanger (39) through a third branch pipe (38), and the third branch pipe (38) is provided with a valve (28), and the plate heat exchanger (39) is provided with a second water inlet pipe (40), a second water outlet pipe (41) and a second gas outlet pipe (42).

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