CN218459095U - Flue gas purification device and fume extractor - Google Patents

Abstract

The application provides a flue gas purification device and smoke exhaust equipment, wherein the flue gas purification device comprises a machine body, a heater, a purifier and a first gas pipe; the machine body is provided with a heat exchange cavity, a first air inlet and a first air outlet; the heater is provided with a heating cavity, a second air inlet and a second air outlet; the purifier is provided with a purifying cavity, a third air inlet and a third air outlet; the first air pipe comprises a pipe body and a radiating piece, the pipe body is provided with a fourth air inlet and a fourth air outlet, the pipe body penetrates through the heat exchange cavity so that the fourth air inlet and the fourth air outlet are positioned outside the heat exchange cavity, and the radiating piece is connected to the part, positioned in the heat exchange cavity, of the pipe body; the first air inlet, the heat exchange cavity, the first air outlet, the second air inlet, the heating cavity, the second air outlet, the third air inlet, the purification cavity, the third air outlet, the fourth air inlet and the fourth air outlet are sequentially communicated to form a purification passage. Under the condition that the preset temperature of the flue gas is the same, the flue gas purification device can adopt a heater with relatively low power, so that the working energy consumption is effectively reduced.

Description

Flue gas purification device and fume extractor

Technical Field

The application belongs to the technical field of flue gas purification, and more specifically relates to a flue gas purification device and fume extractor.

Background

Smoke exhausting equipment such as moxibustion instrument, incinerator can produce a large amount of flue gases after burning the material, if with the flue gas direct discharge outside air environment, the flue gas can cause serious pollution to the air, consequently, adopt smoke purification device to purify the flue gas earlier at present, discharge the flue gas through purifying in the outside air environment again to reduce the pollution degree of flue gas to outside air environment.

The conventional flue gas purification device generally comprises a heater and a purifier, wherein the flue gas is heated to a preset temperature by the heater and then enters the purifier for chemical reaction, so that most pollutants in the flue gas are removed. However, because the temperature of the flue gas is low before entering the heater, the flue gas needs to be rapidly heated to a preset temperature by adopting a high-power heater, which undoubtedly results in great increase of the working energy consumption of the flue gas purification device, and is not beneficial to realizing the requirement of energy saving.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a flue gas purification device and fume extractor to solve the technical problem that the work energy consumption of the flue gas purification device in the prior art is large.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions: provided is a flue gas purification device including:

the heat exchanger comprises a machine body, a first heat exchanger, a second heat exchanger and a third heat exchanger, wherein the machine body is provided with a heat exchange cavity, a first air inlet and a first air outlet;

the heater is provided with a heating cavity, a second air inlet and a second air outlet;

a purifier having a purification chamber, a third air inlet and a third air outlet;

the first air pipe comprises a pipe body and a radiating piece, the pipe body is provided with a fourth air inlet and a fourth air outlet, the pipe body penetrates through the heat exchange cavity so that the fourth air inlet and the fourth air outlet are positioned outside the heat exchange cavity, and the radiating piece is connected to the outer wall of the part, positioned in the heat exchange cavity, of the pipe body;

wherein, first air inlet, heat transfer chamber first gas outlet the second air inlet the heating chamber the second gas outlet third air inlet purify the chamber the third gas outlet the fourth air inlet with the fourth gas outlet communicates in proper order and forms and purifies the route.

The embodiment of the application provides a flue gas purification device has following beneficial effect at least: the embodiment of the application provides a flue gas purification device is through passing the body heat transfer chamber, make fourth air inlet and fourth gas outlet be located the heat transfer chamber outside, and connect the radiating piece on the partial outer wall that is located the heat transfer intracavity of body, simultaneously with first air inlet, the heat transfer chamber, first gas outlet, the second air inlet, the heating chamber, the second gas outlet, the third air inlet, purify the chamber, the third gas outlet, fourth air inlet and fourth gas outlet communicate in proper order and form the purification route, in operation, low temperature flue gas gets into the heat transfer intracavity from first air inlet earlier, then continue to get into the high temperature flue gas that the heating chamber heated to become to have predetermined temperature along above-mentioned purification route, high temperature flue gas gets into to purify the intracavity afterwards and purifies the reaction and clear away most pollutant in the high temperature flue gas, thereby realize purifying the high temperature flue gas, at last high temperature flue gas is discharged to the outside air environment through first trachea. At above-mentioned in-process, when the high temperature flue gas flows through first trachea, partial heat in the high temperature flue gas can transmit to the radiating piece through the body, and the part that is located the heat transfer intracavity of body and radiating piece can be with heat transfer to low temperature flue gas afterwards to the realization preheats the low temperature flue gas. So, compare with traditional gas cleaning device, the gas cleaning device that this application embodiment provided can adopt the less heater of power relatively under the same condition of the temperature of predetermineeing that the flue gas needs to reach to effectively reduced gas cleaning device's work energy consumption, in order to reach energy-conserving purpose.

In some embodiments of the present application, the number of the first air tubes is plural.

In some embodiments of the present application, the machine body further has a first air cavity separated from the heat exchange cavity, and the third air outlet is communicated with each of the fourth air inlets through the first air cavity.

In some embodiments of the present application, the flue gas purification apparatus further includes an exhaust fan, the exhaust fan has an air inlet, the apparatus further has a second air cavity separated from the heat exchange cavity, and the air inlet is communicated with each of the fourth air outlets through the second air cavity.

In some embodiments of the present application, the heat radiating members of the respective first air tubes are connected to each other.

In some embodiments of the present application, the portions of the tubes located in the heat exchange cavity each extend in the flow direction of the flue gas.

In some embodiments of the present application, the first air tube includes a plurality of the heat dissipation members, and the plurality of heat dissipation members are spaced apart along a length of the tube body.

In some embodiments of the present application, the heat sink is a sheet-like structure.

In some embodiments of the present application, the flue gas cleaning device further comprises a filter element, which is disposed on the cleaning path.

In order to achieve the above object, an embodiment of the present application further provides a smoke exhaust device, which includes a device main body and the smoke purification apparatus described in any of the above embodiments, wherein the device main body has a smoke exhaust port, and the first air inlet is communicated with the smoke exhaust port.

The smoke exhaust equipment provided by the embodiment of the application effectively reduces the working energy consumption due to the adoption of the smoke purification device in any one of the embodiments, thereby achieving the purpose of energy conservation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic structural diagram of a flue gas purification device provided in an embodiment of the present application;

FIG. 2 is a left side view schematically showing the flue gas cleaning apparatus shown in FIG. 1;

FIG. 3 isbase:Sub>A schematic sectional view of the flue gas purifying apparatus shown in FIG. 2 taken along the line A-A;

fig. 4 is a schematic structural diagram of a first air tube according to an embodiment of the present application.

Wherein, in the figures, the various reference numbers:

100. a body; 110. a heat exchange cavity; 120. a first air inlet; 130. a first air outlet; 140. a first air cavity; 150. a second air cavity;

200. a heater; 210. a first housing; 211. a heating chamber; 212. a second air inlet; 220. a heating member;

300. a purifier; 310. a second housing; 311. a purification chamber; 320. purifying the reaction member;

400. a first air pipe; 410. a pipe body; 411. a fourth air inlet; 412. a fourth air outlet; 420. a heat sink;

500. an exhaust fan;

600. a second air pipe;

700. and a third air pipe.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", "third", "fourth" may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

A first aspect of the embodiments of the present application provides a smoke purification apparatus, which can be used to collect smoke discharged from a smoke exhausting device and purify the smoke, wherein the smoke exhausting device includes, but is not limited to, a moxibustion instrument, an incense burner, etc. The flue gas purification device provided by the embodiment of the present application will now be described with reference to the accompanying drawings.

Referring to fig. 1 to 4, the flue gas purifying apparatus includes a body 100, a heater 200, a purifier 300 and a first air pipe 400. The body 100 has a heat exchange chamber 110, a first air inlet 120, and a first air outlet 130. The heater 200 has a heating chamber 211, a second air inlet 212 and a second air outlet (not shown). The purifier 300 has a purifying chamber 311, a third air inlet (not shown) and a third air outlet (not shown). The first air duct 400 comprises a duct body 410 and a heat sink 420, the duct body 410 having a fourth air inlet 411 and a fourth air outlet 412, the duct body 410 passing through the heat exchange chamber 110 such that the fourth air inlet 411 and the fourth air outlet 412 are located outside the heat exchange chamber 110, the heat sink 420 being attached to an outer wall of a portion of the duct body 410 located inside the heat exchange chamber 110. The first air inlet 120, the heat exchange cavity 110, the first air outlet 130, the second air inlet 212, the heating cavity 211, the second air outlet, the third air inlet, the purification cavity 311, the third air outlet, the fourth air inlet 411 and the fourth air outlet 412 are sequentially communicated to form a purification passage.

Specifically, the heater 200 refers to a mechanism for heating low-temperature flue gas into high-temperature flue gas having a preset temperature. The heater 200 comprises a first housing 210 and a heating element 220, the first housing 210 has a heating cavity 211, a second air inlet 212 and a second air outlet, the heating element 220 is disposed in the heating cavity 211, the low-temperature flue gas enters the heating cavity 211 through the second air inlet 212, the heating element 220 generates heat and transfers the heat to the low-temperature flue gas, so as to heat the low-temperature flue gas into high-temperature flue gas.

Specifically, the purifier 300 refers to a mechanism that has temperature requirements on the flue gas to be purified and converts at least some of the pollutants in the high temperature flue gas into harmless substances through a series of chemical reactions, such as a three-way catalyst. The purifier 300 comprises a second casing 310 and a purification reaction member 320, the second casing 310 has a purification cavity 311, a third air inlet and a third air outlet, the purification reaction member 320 is disposed in the purification cavity 311, the high temperature flue gas enters the purification cavity 311 through the third air inlet and contacts with the purification reaction member 320, so that the related pollutants in the high temperature flue gas and the purification substances in the purification reaction are subjected to a chemical reaction, and the related pollutants in the high temperature flue gas are converted into harmless substances. The kind of the purification reaction member 320 may be determined according to the kind of the purifier 300, for example, the purifier 300 is a three-way catalyst, and accordingly, the purification reaction member 320 is a three-way catalyst carrier.

It should be noted that, when the tube body 410 passes through the heat exchange cavity 110 so that the fourth air inlet 411 and the fourth air outlet 412 are located outside the heat exchange cavity 110, it means that the first end of the tube body 410 extends out of the heat exchange cavity 110, the first end of the tube body 410 is provided with the fourth air inlet 411, and the outer peripheral wall of the first end of the tube body 410 is hermetically connected with the cavity wall of the heat exchange cavity 110, so that the flue gas flowing through the fourth air inlet 411 cannot enter the internal environment of the heat exchange cavity 110, similarly, the second end of the tube body 410 extends out of the heat exchange cavity 110, the second end of the tube body 410 is provided with the fourth air outlet 412, and the outer peripheral wall of the second end of the tube body 410 is hermetically connected with the cavity wall of the heat exchange cavity 110, so that the flue gas flowing through the fourth air outlet 412 cannot enter the internal environment of the heat exchange cavity 110.

It is understood that the heat sink 420 refers to a component having a heat conductive property, and the heat sink 420 serves as a heat conductive medium between the tube body 410 and the internal air environment of the heat exchange cavity 110, i.e. heat on the tube body 410 can be transferred to the internal air environment of the heat exchange cavity 110 through the heat sink 420.

It is understood that the cleaning path refers to a flow path of the flue gas, in other words, the flue gas flows through the first gas inlet 120, the heat exchange cavity 110, the first gas outlet 130, the second gas inlet 212, the heating cavity 211, the second gas outlet, the third gas inlet, the cleaning cavity 311, the third gas outlet, the fourth gas inlet 411 and the fourth gas outlet 412 in sequence.

Specifically, the flue gas purification device further comprises a second gas pipe 600 and a third gas pipe 700, one end of the second gas pipe 600 is connected to the first gas outlet 130, and the other end of the second gas pipe 600 is connected to the second gas inlet 212, so as to communicate the first gas outlet 130 with the second gas inlet 212. One end of the third air pipe 700 is connected to the first air inlet 120, and the other end of the third air pipe 700 is connected to the smoke outlet of the smoke exhausting device, so as to collect the smoke exhausted by the smoke exhausting device.

According to the flue gas purification device provided by the embodiment of the application, the pipe body 410 penetrates through the heat exchange cavity 110, so that the fourth gas inlet 411 and the fourth gas outlet 412 are located outside the heat exchange cavity 110, the heat dissipation member 420 is connected to the outer wall of the part, located in the heat exchange cavity 110, of the pipe body 410, and meanwhile, the first gas inlet 120, the heat exchange cavity 110, the first gas outlet 130, the second gas inlet 212, the heating cavity 211, the second gas outlet, the third gas inlet, the purification cavity 311, the third gas outlet, the fourth gas inlet 411 and the fourth gas outlet 412 are sequentially communicated to form a purification passage. In the above process, when the high temperature flue gas flows through the first air pipe 400, part of the heat in the high temperature flue gas can be transferred to the heat dissipation member 420 through the pipe body 410, and then the part of the pipe body 410 located in the heat exchange cavity 110 and the heat dissipation member 420 can transfer the heat to the low temperature flue gas, so as to preheat the low temperature flue gas. So, compare with traditional gas cleaning device, the gas cleaning device that this application embodiment provided can adopt the less heater 200 of power relatively under the condition that the temperature is the same in presetting that the flue gas needs to reach to effectively reduced gas cleaning device's work energy consumption, in order to reach energy-conserving purpose.

In addition, the heat conduction area of the first air pipe 400 is effectively increased by connecting the heat dissipation member 420 to the outer wall of the part, located in the heat exchange cavity 110, of the pipe body 410, so that heat can be effectively transferred to low-temperature flue gas, the preheating effect on the low-temperature flue gas is effectively improved, the working power of the heater 200 can be further reduced, and the working energy consumption of the flue gas purification device is further reduced.

In addition, through the heat transfer with the high temperature flue gas for low temperature flue gas in heat transfer chamber 110, can effectively reduce the temperature of high temperature flue gas, when smoke purification device was applied to the indoor environment on the one hand, can avoid resulting in the circumstances that the indoor environment temperature rose by a wide margin because of the exhaust temperature of high temperature flue gas to take place, thereby effectively reduced the energy consumption of carrying out refrigeration accuse temperature to the indoor environment, on the other hand need not additionally to set up radiator fan and cools off the high temperature flue gas, thereby smoke purification device's noise at work has been reduced, smoke purification device's manufacturing cost has also been reduced simultaneously.

In some embodiments of the present application, referring to fig. 3, the number of the first air pipes 400 is plural.

It should be noted that the number of the first air pipes 400 can be determined according to the actual application, for example, the number of the first air pipes 400 is two; also, for example, the number of the first air tubes 400 is three, etc., and is not particularly limited herein.

Through adopting above-mentioned technical scheme for the high temperature flue gas can be discharged to the outside air environment through many first trachea 400, in this process, the heat of high temperature flue gas can transmit to on each first trachea 400, and each first trachea 400 can be with heat transfer for low temperature flue gas in heat transfer chamber 110, thus, effectively increased the heat transfer area who acts on low temperature flue gas, thereby effectively promoted the effect of preheating to low temperature flue gas, can further reduce heater 200's operating power, and then further reduced gas cleaning device's work energy consumption.

In some embodiments of the present application, referring to fig. 3, the machine body 100 further has a first air cavity 140 separated from the heat exchange cavity 110, and the third air outlet is communicated with each fourth air inlet 411 through the first air cavity 140.

It should be noted that, the first air cavity 140 and the heat exchange cavity 110 are separately arranged, that is, during the operation of the flue gas purification apparatus, the flue gas in the heat exchange cavity 110 can only sequentially pass through the first air outlet 130, the second air inlet 212, the heating cavity 211, the second air outlet, the third air inlet, the purification cavity 311 and the third air outlet and then enter the first air cavity 140, and the flue gas in the first air cavity 140 cannot enter the heat exchange cavity 110.

Through adopting above-mentioned technical scheme, the high temperature flue gas of following the discharge of third gas outlet can get into each first trachea 400 in the homodisperse back in first air cavity 140 for the flow of the high temperature flue gas of each first trachea 400 is roughly the same, in other words, the heat that the high temperature flue gas transmits for each first trachea 400 is also roughly the same, makes the heat distribution in the heat transfer chamber 110 more even, thereby realizes evenly preheating the low temperature flue gas.

In some embodiments of the present application, referring to fig. 1 to 3, the flue gas cleaning apparatus further includes an exhaust fan 500, the exhaust fan 500 has an air inlet, the body 100 further has a second air cavity 150 separated from the heat exchange cavity 110, and the air inlet is communicated with each fourth air outlet 412 through the second air cavity 150.

It should be noted that the suction fan 500 includes, but is not limited to, a dc fan, a vortex fan, etc.

It should be further noted that the second air cavity 150 and the heat exchange cavity 110 are separately arranged, which means that in the working process of the flue gas cleaning device, the flue gas in the heat exchange cavity 110 can only sequentially pass through the first air outlet 130, the second air inlet 212, the heating cavity 211, the second air outlet, the third air inlet, the cleaning cavity 311, the third air outlet, the fourth air inlet 411 and the fourth air outlet 412 and then enter the second air cavity 150, and the flue gas in the second air cavity 150 cannot enter the heat exchange cavity 110.

By adopting the above technical scheme, the flue gas discharged from the fourth gas outlet 412 of each first gas pipe 400 is gathered in the second gas cavity 150, and then the flue gas is extracted outwards by the exhaust fan 500, thereby effectively improving the smoke exhaust speed of the flue gas purification device.

In other embodiments, the air inlet of the air blower 500 can be connected to the fourth air outlet 412 of the first air pipe 400 through a pipe.

In some embodiments of the present application, the heat sink 420 of each of the first air tubes 400 is connected to each other.

Through adopting above-mentioned technical scheme, the heat of each first trachea 400 passes through heat dissipation piece 420 and transmits each other for the heat of each first trachea 400 is roughly the same, thereby makes the heat distribution in the heat transfer chamber 110 more even, effectively realizes evenly preheating the low temperature flue gas.

In some embodiments of the present application, referring to fig. 3, the portions of the tubes 410 located in the heat exchange cavity 110 extend along the flow direction of the flue gas.

In other words, the portion of the tube 410 located in the heat exchange chamber 110 is parallel to the direction of the flue gas flowing in the heat exchange chamber 110.

Through adopting above-mentioned technical scheme for the in-process that the low temperature flue gas flows in heat transfer chamber 110 can fully contact with first trachea 400, with the heat transfer of first trachea 400 to low temperature flue gas more effectively, thereby effectively promoted the preheating effect to low temperature flue gas, can further reduce heater 200's operating power, and then further reduced gas cleaning device's work energy consumption.

In some embodiments of the present application, referring to fig. 4, the first air pipe 400 includes a plurality of heat dissipation members 420, and the plurality of heat dissipation members 420 are spaced apart along the length direction of the pipe 410.

It should be noted that the number of heat dissipation members 420 of first air pipe 400 may be determined according to practical application requirements, for example, the number of heat dissipation members 420 of first air pipe 400 is 20; for another example, the heat dissipation members 420 of the first air tube 400 are provided in a number of 30, which is not particularly limited herein.

Through adopting above-mentioned technical scheme, the heat conduction area of first trachea 400 has further been increased to can be more effectively with heat transfer to low temperature flue gas, effectively promoted the effect of preheating to low temperature flue gas, can further reduce heater 200's operating power, and then further reduce gas cleaning device's work energy consumption.

In some embodiments of the present application, referring to fig. 4, the heat sink 420 has a sheet-like structure.

Through adopting above-mentioned technical scheme, the heat conduction area of first trachea 400 has further been increased to can be more effectively with heat transfer to low temperature flue gas, effectively promoted the effect of preheating to low temperature flue gas, can further reduce heater 200's operating power, and then further reduce gas cleaning device's work energy consumption.

Of course, in other embodiments, the heat dissipation member 420 may have other structures, such as a strip structure, which is not limited in this respect.

In some embodiments of the present application, the flue gas cleaning device further comprises a filter (not shown) disposed on the cleaning path.

The filter element refers to a component for filtering solid substances in the flue gas, and includes, but is not limited to, a filter screen, an activated carbon filter, and the like.

Specifically, the filter element may be disposed anywhere on the purification pathway, e.g., the filter element is disposed at the first inlet port 120; as another example, a filter is disposed at the first outlet port 130. Of course, the number of the filter elements may be one or more, and when the number of the filter elements is more than one, the filter elements may be disposed at different positions on the purifying path, for example, one filter element is disposed at each of the first air inlet 120 and the first air outlet 130.

Through adopting above-mentioned technical scheme, effectively isolate the solid state material in the flue gas to effectively promote gas cleaning device's purifying effect.

A second aspect of the embodiments of the present application provides a smoke evacuation apparatus, comprising an apparatus main body and the smoke purification apparatus of any of the above embodiments, wherein the apparatus main body has a smoke exhaust, and the first air inlet 120 is communicated with the smoke exhaust.

The smoke exhaust equipment provided by the embodiment of the application effectively reduces the working energy consumption due to the adoption of the smoke purification device of any one of the embodiments, thereby achieving the purpose of energy conservation.

The smoke exhaust device is a device for generating smoke after burning materials and exhausting the smoke to the outside air environment, and includes, but is not limited to, a moxibustion instrument, an incinerator, and the like.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A flue gas purification device is characterized in that: the flue gas purification device comprises:

the heat exchanger comprises a machine body, a first heat exchanger, a second heat exchanger and a third heat exchanger, wherein the machine body is provided with a heat exchange cavity, a first air inlet and a first air outlet;

a heater having a heating chamber, a second air inlet and a second air outlet;

a purifier having a purification chamber, a third air inlet and a third air outlet;

the first air pipe comprises a pipe body and a radiating piece, the pipe body is provided with a fourth air inlet and a fourth air outlet, the pipe body penetrates through the heat exchange cavity so that the fourth air inlet and the fourth air outlet are positioned outside the heat exchange cavity, and the radiating piece is connected to the outer wall of the part, positioned in the heat exchange cavity, of the pipe body;

the first air inlet, the heat exchange cavity, the first air outlet, the second air inlet, the heating cavity, the second air outlet, the third air inlet, the purification cavity, the third air outlet, the fourth air inlet and the fourth air outlet are sequentially communicated to form a purification passage.

2. The flue gas purification device according to claim 1, wherein: the number of the first air pipes is multiple.

3. The flue gas purification apparatus according to claim 2, wherein: the machine body is also provided with a first air cavity separated from the heat exchange cavity, and the third air outlet is communicated with the fourth air inlets through the first air cavity.

4. The flue gas cleaning device according to claim 2, wherein: the smoke purifying device also comprises an exhaust fan, the exhaust fan is provided with an air inlet, the machine body is also provided with a second air cavity which is separated from the heat exchange cavity, and the air inlet is communicated with the fourth air outlets through the second air cavity.

5. The flue gas cleaning device according to claim 2, wherein: the heat radiating members of the respective first air tubes are connected to each other.

6. The flue gas purification apparatus according to any one of claims 1 to 5, wherein: the part of the pipe body, which is positioned in the heat exchange cavity, extends along the flowing direction of the flue gas.

7. The flue gas purification apparatus according to any one of claims 1 to 5, wherein: the first air pipe comprises a plurality of heat dissipation members which are distributed at intervals along the length direction of the pipe body.

8. The flue gas cleaning device according to any one of claims 1 to 5, wherein: the heat dissipation piece is of a sheet structure.

9. The flue gas purification apparatus according to any one of claims 1 to 5, wherein: the flue gas purification device further comprises a filtering piece, and the filtering piece is arranged on the purification passage.

10. A fume extraction apparatus, characterized by: the fume extractor comprising an apparatus body and a fume cleaning device according to any one of claims 1 to 9, the apparatus body having a smoke outlet, the first air inlet being in communication with the smoke outlet.

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