CN112160923A

CN112160923A - Fan system for gas waste heat recovery

Info

Publication number: CN112160923A
Application number: CN202011068475.6A
Authority: CN
Inventors: 屠赛飞
Original assignee: Zhejiang Fengshen Ventilator Manufacture Co ltd
Current assignee: Zhejiang Fengshen Ventilator Manufacture Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-01-01
Anticipated expiration: 2040-09-28
Also published as: CN112160923B

Abstract

The invention discloses a fan system for recovering gas waste heat, which comprises a base and a fan, wherein the fan is provided with a recovered gas inlet and a recovered gas outlet, one side of the fan is provided with a slideway, the slideway is respectively provided with a plurality of air inlets and a plurality of air outlets in two rows at equal intervals, the air inlet at one end is connected with the recovered gas outlet, circulating air ducts are connected between the other air inlets and the adjacent air outlets, the slideway is provided with a slide block, and the slide block is provided with an adjusting air inlet and an adjusting air outlet which are in one-to-one correspondence with the plurality of air inlets and the plurality; the adjusting air inlet and the adjusting air outlet on the adjacent rear side of the adjusting air inlet are connected with an outlet and an inlet of the waste heat recovery device through a telescopic hose, the recovery temperature of the waste heat recovery device is gradually reduced from one side to the other side, and the fan system further comprises a sliding block driving mechanism driven by an adjusting motor and an automatic control circuit. Such a fan system can automatically allocate the appropriate recovery device according to the gas temperature.

Description

Fan system for gas waste heat recovery

Technical Field

The invention belongs to the technical field of fans, and particularly relates to a fan system for recovering gas waste heat.

Background

The fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Fans are widely used for ventilation, dust exhaust and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, and for ventilation and draught of boilers and industrial furnaces and kilns; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grain, wind tunnel wind source and air cushion boat inflating and propelling.

With the gradual increase of the awareness of energy conservation and emission reduction of people, in the prior art, high-temperature steam, flue gas and the like generated in a factory are often recycled to be recycled in production. The gas generated in each process step of the factory has different temperatures, so the recovery modes are different, the gas with different temperatures needs to be introduced into different recovery devices, for example, the recovery device needs to heat materials at 200 ℃, then the gas with the temperature higher than 200 ℃ needs to be introduced to recover the gas waste heat, and the other recovery device needs to heat water at 30 ℃, so the gas waste heat can be recovered as long as the gas temperature is higher than 30 ℃; the existing fan is difficult to convey gas into different recovery devices according to different gas temperatures.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the fan system for recovering the gas waste heat, and the fan system can automatically distribute proper recovery devices for the gas with different temperatures according to the temperature by switching channels according to the temperature, so that the gas waste heat can be recovered in an optimal recovery mode.

In order to solve the technical problem, the invention is solved by the following technical scheme: the fan system for recovering the gas waste heat comprises a base and a fan, wherein a recovered gas inlet and a recovered gas outlet are formed in the fan, a slide way is formed in one side of the fan, a plurality of air inlets and a plurality of air outlets are formed in the slide way in an equidistant mode and are arranged in two rows, the air inlet at one end is connected with the recovered gas outlet, a circulating air channel is connected between the rest air inlets and the adjacent air outlets, a sliding block is arranged on the slide way, and an adjusting air inlet and an adjusting air outlet which are in one-to-one correspondence with the plurality of air inlets and the plurality of air outlets are formed in the sliding block; the adjusting air inlet and the adjusting air outlet on the adjacent rear side of the adjusting air inlet are connected with an outlet and an inlet of a waste heat recovery device through a telescopic hose, the recovery temperature of the waste heat recovery device is gradually reduced from one side to the other side, the fan system further comprises a slider driving mechanism driven by an adjusting motor, a plurality of normally closed temperature control switches with different open circuit temperatures or normally open temperature control switches with different open circuit temperatures are arranged in the recycling gas inlet, a plurality of contact blocks with equal length to the adjacent air inlet center distance are arranged along the slide way direction, the contact blocks are spaced through an insulating layer and are adjacent to each other and are connected with one of the temperature control switches in series, the open circuit temperature or the open circuit temperature of the connected temperature control switches is gradually increased from one end to the other end of the contact blocks, the slider is provided with two contact pieces, the distance between the two contact pieces is equal to the adjacent air inlet center distance, and is respectively in contact, slide both ends be provided with respectively with slider complex first normally closed travel switch and second normally closed travel switch, two contacts the feeler block temperature detect switch first normally closed travel switch regulating motor, regulating switch and power are established ties and are formed regulating circuit, second normally closed travel switch regulating motor, reset switch and power are established ties and are formed reset circuit. The fan system can move the slide block according to the temperature of the recovered gas to adjust the waste heat recovery device communicated with each air outlet and each air inlet, when the temperature of the recovered gas is higher, the recovered gas firstly enters the waste heat recovery device with the higher temperature recovered at the front side, the gas with the reduced temperature is accelerated by the centrifugal fan blade and then enters the waste heat recovery device with the slightly lower temperature recovered at the rear side, and the gas is discharged after being recovered for multiple times; if the temperature of the recovered gas is slightly lower, the air outlet at the forefront side is directly connected with a waste heat recovery device for recovering slightly lower temperature through the movable sliding block; the fan can automatically switch the channels of the gas with different temperatures according to the temperatures, and a proper recovery device is distributed according to the temperatures, so that the waste heat of the gas can be recovered in an optimal recovery mode.

In the above technical scheme, preferably, the fan system further includes a waste heat recovery device connecting plate, a plurality of air inlet connectors and air outlet connectors are arranged on the waste heat recovery device connecting plate, the air inlet connectors and the air outlet connectors are in one-to-one correspondence and are connected through the telescopic hoses to adjust the air inlets and adjust the air outlets, and inlets and outlets of the waste heat recovery devices are respectively connected with the air outlet connectors and the air inlet connectors. Adopt this structure to make waste heat recovery device lug connection on the connecting plate, waste heat recovery device's pipeline is fixed, changes the installation.

Among the above-mentioned technical scheme, it is preferred, scalable hose is the bellows, and is a plurality of adjust the air intake with all be provided with the bulge loop on the regulation air outlet, bellows one end is fixed in through the clamp on the bulge loop.

In the above technical scheme, preferably, a plurality of adjusting air inlets and adjusting air outlets are movably provided with a sealing sleeve, a spring is arranged between the tail of the sealing sleeve and the convex ring, a plurality of elastic sealing rings are arranged on the air inlets and the air outlets, and when the sealing sleeve is aligned with the air inlets or the air outlets, the sealing sleeve tightly pushes the elastic sealing rings for sealing. By adopting the structure, the spring can prop against the sealing sleeve and apply pressure to the elastic sealing ring, so that the sealing property is improved, and the leakage of the recovered gas is prevented.

In the above technical solution, preferably, the slider driving mechanism includes a screw rod driven by an adjusting motor and arranged along the direction of the slide way, the screw rod is in threaded fit with the slider, and the adjusting motor rotates to adjust the position of the slider on the slide way.

In the above technical solution, preferably, the slider driving mechanism includes a rack arranged along the direction of the slide, a gear driven by an adjusting motor is arranged on the slider, the gear is combined with the rack, and the adjusting motor rotates to adjust the position of the slider on the slide.

In the above technical solution, preferably, two ends of the power supply are connected to a main switch.

Compared with the prior art, the invention has the following beneficial effects: the fan system can move the slide block according to the temperature of the recovered gas to adjust the waste heat recovery device communicated with each air outlet and each air inlet, when the temperature of the recovered gas is higher, the recovered gas firstly enters the waste heat recovery device with the higher temperature recovered at the front side, the gas with the reduced temperature is accelerated by the centrifugal fan blade and then enters the waste heat recovery device with the slightly lower temperature recovered at the rear side, and the gas is discharged after being recovered for multiple times; if the temperature of the recovered gas is slightly lower, the air outlet at the forefront side is directly connected with a waste heat recovery device for recovering slightly lower temperature through the movable sliding block; the fan can automatically switch the channels of the gas with different temperatures according to the temperatures, and a proper recovery device is distributed according to the temperatures, so that the waste heat of the gas can be recovered in an optimal recovery mode.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic sectional view taken along the line a-a in fig. 1.

Fig. 3 is a schematic structural diagram of the present invention.

FIG. 4 is a schematic structural diagram of another embodiment of the present invention.

Fig. 5 is a connection circuit diagram of the adjustment motor of the present invention.

Fig. 6 is an exploded view of the present invention.

FIG. 7 is a schematic view of the connection structure between the back of the slider and the slider driving mechanism according to the present invention.

FIG. 8 is a schematic cross-sectional view of the slide and the slider of the present invention.

Fig. 9 is a schematic structural diagram of another slide block driving mechanism adopted in the invention.

Detailed Description

The invention is described in further detail below with reference to the following detailed description and accompanying drawings: referring to fig. 1 to 9, a fan system for recovering waste heat of gas comprises a base 1 and a fan 2, the fan 2 is provided with a recovered gas inlet 21 and a recovered gas outlet 22, a fan blade 24 driven by a fan blade motor 23 is arranged in a casing of the fan 2, one side of the fan 2 is provided with two parallel slideways 3, the slideways 3 are respectively provided with four air inlets 31 and five air outlets 32 in two rows at equal intervals, the four air inlets 31 and the five air outlets 32 are respectively arranged on the slideways 3 in two rows at equal intervals, the four air inlets 31 are arranged in one row at equal intervals on one slideway 3, the five air outlets 32 are arranged in one row at equal intervals on the other slideway 3, the interval between the air inlets 31 is the same as that between the air outlets 32, the air inlet 31 at one end is connected with the recovered gas outlet 22, and the other air inlets 31 and the adjacent air outlets 32 are, the number of the circulating air ducts 33 is four, the slide rail 3 is provided with a slide block 4, and the slide block 4 is provided with an adjusting air inlet 41 and an adjusting air outlet 42 which are in one-to-one correspondence with the four air inlets 31 and the five air outlets 32; the adjusting air inlet 41 and the adjusting air outlet 42 at the adjacent rear side are connected with the outlet and the inlet of the waste heat recovery device through a telescopic hose 5, the recovery temperature of the waste heat recovery device is gradually reduced from one side to the other side, the fan system also comprises a slide block driving mechanism 8 driven by an adjusting motor 81, four normally closed temperature control switches 91 with different open circuit temperatures or normally open temperature control switches with different access temperatures are arranged in the recovered air inlet 21, five contact blocks 92 with the same distance with the centers of the adjacent air inlets 31 are arranged along the direction of the slideway 3, the contact blocks 92 are separated by an insulating layer 93, the adjacent contact block 92 is connected with one of the temperature control switches 91 in series, the open circuit temperature or the access temperature of the connected temperature control switch 91 is gradually increased from one end to the other end of the five contact blocks 92, two contact sheets 94 are arranged on the slide block 4, the distance between the two contact sheets 94 is the same as the center distance between the adjacent air, the two ends of the slideway 3 are respectively provided with a first normally closed travel switch 95 and a second normally closed travel switch 96 which are matched with the sliding block 4, the two contact pieces 94, the contact block 92, the temperature control switch 91, the first normally closed travel switch 95, the adjusting motor 81, the adjusting switch 97 and the power supply 98 are connected in series to form an adjusting circuit, and the second normally closed travel switch 96, the adjusting motor 81, the reset switch 99 and the power supply 98 are connected in series to form a reset circuit.

Referring to fig. 2, 3, 4, 6 and 7, the slide block driving mechanism 8 includes a screw rod 82 provided in the slide way direction and driven by an adjusting motor 81, the screw rod 82 is screw-engaged with the slide block 4, and the adjusting motor 81 rotates to adjust the position of the slide block 4 on the slide way 3.

Referring to fig. 9, another embodiment of the slide block driving mechanism 8 is shown, the slide block driving mechanism 8 includes a rack 83 disposed along the direction of the slide way 3, a gear 84 driven by an adjusting motor 81 is disposed on the slide block 4, the gear 84 is combined with the rack 83, and the adjusting motor 81 rotates to adjust the position of the slide block 4 on the slide way 3.

Referring to fig. 2 to 5, taking the temperature control switch 91 as a normally closed temperature control switch as an example, the temperature control switch 91 is a thermal sensitive bimetallic strip temperature control switch, four normally closed temperature control switches 91 with different open circuit temperatures are arranged in the recovered gas inlet 21, five contact blocks 92 with the same center distance with the adjacent air inlet 31 are arranged along the direction of the chute 3, the contact blocks 92 are spaced by an insulating layer 93, the adjacent contact blocks 92 are connected in series with one of the normally closed temperature control switches 91, the open circuit temperature of the connected normally closed temperature control switch 91 is gradually increased from one end to the other end of the five contact blocks 92, the slider 4 is provided with two contact pieces 94, the distance between the two contact pieces 94 is equal to the center distance between the adjacent air inlet 31, and the two contact pieces 94 are respectively in contact with the adjacent contact blocks 92, the two ends of the chute 3 are respectively provided with a first normally closed travel switch 95 and a second normally closed travel switch 96 which are, The normally closed temperature control switch 91, the first normally closed travel switch 95, the adjusting motor 81, the adjusting switch 97 and the power supply 98 are connected in series to form an adjusting circuit, the second normally closed travel switch 96, the adjusting motor 81, the reset switch 99 and the power supply 98 are connected in series to form a reset circuit, and the two ends of the power supply 98 are connected with a main switch 910. Before recovery begins, the main switch 910 is turned on, the reset switch 99 is turned on to connect the reset circuit to adjust the motor 81 to rotate forward to reset the sliding block 4 to be in contact with the second normally closed travel switch 96, the adjusting motor 81 stops rotating automatically, namely the position shown in FIG. 3, and then the reset switch 99 turns off the reset circuit; the fan motor 23 is started to suck the recovered gas into the recovered gas inlet 21, four normally closed temperature control switches 91 in the recovered gas inlet 21 are all heated, the open circuit temperatures of the normally closed temperature control switches 91 in the embodiment are respectively 100 ℃, 200 ℃, 300 ℃ and 400 ℃, in fig. 3 and 4, the open circuit temperatures of the normally closed temperature control switches 91 connected with adjacent contact blocks 92 gradually rise from left to right, after the recovered gas is introduced into the recovered gas inlet 21 for a period of time, the normally closed temperature control switches 91 may be partially disconnected due to temperature rise, or may be completely disconnected or completely closed, when the recovered gas temperature is lower than 100 ℃, the temperature control switches 91 are completely closed, when the recovered gas temperature is higher than 100 ℃ and lower than 400 ℃, the normally closed temperature control switches 91 are partially closed, when the recovered gas temperature is higher than 400 ℃, the temperature control switches 91 are completely disconnected, and then the adjusting switches 97 are opened to connect the adjusting circuit, when the recovered gas temperature is higher than 400 ℃, the closed temperature control switch 91 is completely switched off, the normally closed temperature control switch 91 between the two contact blocks 92 at the rightmost side is switched off, so that the adjusting motor 81 does not operate, and when the recovered gas temperature is higher than 100 ℃ and lower than 400 ℃, the normally closed temperature control switch 91 between the two contact blocks 92 at the rightmost side is inevitably switched on, and the adjusting motor 81 reversely rotates to drive the sliding block 4 to move leftwards until the two contact blocks 94 move to the position where the normally closed temperature control switch 91 between the two contact blocks 92 in contact with the sliding block is switched off; when the temperature of the recovered gas is lower than 100 ℃, the normally closed temperature control switch 91 is completely closed, and the adjusting motor 81 rotates reversely to drive the sliding block 4 to move leftwards to be in contact with the first normally closed travel switch 95 to stop running, namely the position shown in fig. 4. The recovered air can be directly exhausted from the air outlet connecting port 62 at the rightmost side of the waste heat recovery device connecting plate 6 through the recovered air inlet 21, the air outlet 32 at the leftmost side, the adjusting air outlet 42 at the rightmost side and the telescopic hose 5.

Referring to fig. 2 to 5 as well, taking the temperature control switch 91 as a normally open temperature control switch as an example, the temperature control switch 91 is a thermal sensitive bimetallic strip temperature control switch, and the circuit diagram of the connection is not changed, but the difference is that the positions of the first normally closed travel switch 95 and the second normally closed travel switch 96 on the slideway 3 are exchanged, and the rotation directions of the adjusting motor 81 during resetting and adjusting are opposite, that is, the position in fig. 4 is an initial position, and the position in fig. 3 is a position where all the normally open temperature control switches 91 are closed. Before recovery begins, the main switch 910 is turned on, the reset switch 99 is turned on, the reset circuit adjusting motor 81 is turned on, the sliding block 4 is reset to be in contact with the second normally closed travel switch 96, the adjusting motor 81 stops automatically, namely the position shown in FIG. 4, and then the reset circuit is turned off by the reset switch 99; the open circuit temperature of the normally open temperature controlled switch 91 is 100 ℃, 200 ℃, 300 ℃ and 400 ℃, respectively, in fig. 3 and 4, the open circuit temperature of the normally closed temperature controlled switch 91 connected with the adjacent contact block 92 gradually rises from left to right, after the recovered gas is introduced into the recovered gas inlet 21 for a period of time, part of the normally open temperature controlled switch 91 may be closed due to temperature rise, or may be completely opened or completely closed, when the recovered gas temperature is lower than 100 ℃, the normally open temperature controlled switch 91 is completely opened, when the recovered gas temperature is higher than 100 ℃ and lower than 400 ℃, the normally open temperature controlled switch 91 is partially opened, the normally open temperature controlled switch 91 is partially closed, when the recovered gas temperature is higher than 400 ℃, the normally open temperature controlled switch 91 is completely closed, then the adjusting switch 97 is opened to switch on the adjusting circuit, when the recovered gas temperature is higher than 400 ℃, the adjusting motor 81 positively moves to drive the slide block 4 to be contacted with the first normally closed travel switch 95 to stop operation, i.e., the figure 3 position; when the temperature of the recovered gas is lower than 100 ℃, the sliding block 4 stays at the initial position because the normally open temperature control switch 91 between the two contact blocks 92 at the leftmost side is switched off, so that the adjusting motor 81 does not operate; when the temperature of the recovered gas is higher than 100 ℃ and lower than 400 ℃, the normally open temperature control switch 91 between the two contact blocks 92 at the leftmost side is closed inevitably, the regulating motor 81 rotates forwards to drive the sliding block 4 to move rightwards until the two contact pieces 94 move to the position where the normally open temperature control switch 91 between the two contact blocks 92 contacted with the sliding block is opened.

The fan system can move the slide block 4 according to the temperature of the recovered gas to adjust the waste heat recovery device communicated with each air outlet 32 and each air inlet 31, when the temperature of the recovered gas is higher, the recovered gas firstly enters the waste heat recovery device at the front side for recovering higher temperature, and then the discharged gas with reduced temperature enters the waste heat recovery device at the rear side for recovering slightly lower temperature, and the gas is discharged after being recovered for multiple times; if the temperature of the recovered gas is slightly lower, the air outlet 32 at the forefront side is directly connected with a waste heat recovery device for recovering slightly lower temperature through the movable sliding block 4; the channels are switched according to the temperature of the gas with different temperatures, and the gas is distributed to appropriate recovery devices according to the temperature, so that the waste heat of the gas can be recovered in an optimal recovery mode.

In order to fix the pipeline of the waste heat recovery device when the fan system operates and to facilitate installation, the fan system further comprises a waste heat recovery device connecting plate 6, an air inlet connecting port 61 and an air outlet connecting port 62 are arranged on the waste heat recovery device connecting plate 6, the air inlet connecting port 61 and the air outlet connecting port 62 are connected with an adjusting air inlet 41 and an adjusting air outlet 42 through a telescopic hose 5 in one-to-one correspondence, and an inlet and an outlet of the waste heat recovery device are respectively connected with the air outlet connecting port 62 and the air inlet connecting port 61.

Referring to fig. 8, in the present embodiment, the flexible hose 5 is a corrugated tube, the adjusting air inlet 41 and the adjusting air outlet 42 are both provided with a protruding ring 44, and one end of the corrugated tube is fixed on the protruding ring 44 through the clip 7.

A sealing sleeve 45 is movably arranged in each of the adjusting air inlet 41 and the adjusting air outlet 42, a spring 46 is arranged between the tail part of the sealing sleeve 45 and the convex ring 44, elastic sealing rings 48 are arranged on the air inlet 31 and the air outlet 32, and when the sealing sleeve 45 is aligned with the air inlet 31 or the air outlet 32, the sealing sleeve 45 tightly pushes the elastic sealing rings 48 for sealing. When the adjusting air inlet 41 is aligned with the air inlet 31 or the adjusting air outlet 42 is aligned with the air outlet 32, the spring 46 can abut against the sealing sleeve 56 and apply pressure to the elastic sealing ring 48, so that the sealing performance is improved, and the leakage of the recovered gas is prevented.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A fan system for gaseous waste heat recovery, including base (1) and fan (2), be provided with recovery gas entry (21) and recovery gas export (22), its characterized in that on fan (2): a slide way (3) is arranged on one side of the fan (2), a plurality of air inlets (31) and a plurality of air outlets (32) are respectively arranged on the slide way (3) in two rows at equal intervals, the air inlet (31) at one end is connected with the recovered gas outlet (22), a circulating air duct (33) is connected between the rest air inlets (31) and the adjacent air outlets (32), a slide block (4) is arranged on the slide way (3), and adjusting air inlets (41) and adjusting air outlets (42) which are in one-to-one correspondence with the air inlets (31) and the air outlets (32) are arranged on the slide block (4); adjust air intake (41) and its adjacent rear side adjust air outlet (42) and pass through scalable hose (5) and connect waste heat recovery device's export and import, waste heat recovery device's recovery temperature reduces from a side to opposite side gradually, fan system is still including slider actuating mechanism (8) by adjusting motor (81) driven, be provided with a plurality of normally closed temperature control switch (91) or the different normally open temperature control switch of route temperature in recovery gas entry (21), follow slide (3) direction be provided with a plurality of with adjacent touch multitouch (92) of air intake (31) center interval isometric, pass through insulating layer (93) interval between touch multitouch (92), it is adjacent touch multitouch (92) and one of them temperature control switch (91) establish ties, and the temperature of opening or the route temperature of temperature control switch (91) that connect rises from a plurality of one end to the other end of touch multitouch (92) gradually, the novel air conditioner is characterized in that two contact pieces (94) are arranged on the sliding block (4), the distance between the two contact pieces (94) and the distance between the centers of the adjacent air inlets (31) are equal in length and are respectively in contact conduction with the adjacent contact blocks (92), two ends of the slide way (3) are respectively provided with a first normally closed travel switch (95) and a second normally closed travel switch (96) which are matched with the sliding block (4), the two contact pieces (94), the contact blocks (92), the temperature control switch (91), the first normally closed travel switch (95), the adjusting motor (81), the adjusting switch (97) and the power supply (98) are connected in series to form an adjusting circuit, and the second normally closed travel switch (96), the adjusting motor (81), the reset switch (99) and the power supply (98) are connected in series to form a reset circuit.

2. The fan system for gas waste heat recovery of claim 1, wherein: the fan system is characterized by further comprising a waste heat recovery device connecting plate (6), wherein a plurality of air inlet connectors (61) and air outlet connectors (62) are arranged on the waste heat recovery device connecting plate (6), the air inlet connectors (61) and the air outlet connectors (62) are in one-to-one correspondence to each other and are connected through telescopic hoses (5) to adjust the air inlets (41) and the air outlets (42), and the inlets and the outlets of the waste heat recovery devices are respectively connected with the air outlet connectors (62) and the air inlet connectors (61).

3. The fan system for gas waste heat recovery according to claim 1 or 2, wherein: scalable hose (5) are the bellows, and are a plurality of adjust air intake (41) with all be provided with bulge loop (44) on adjusting air outlet (42), bellows one end is fixed in through clamp (7) on bulge loop (44).

4. The fan system for gas waste heat recovery of claim 3, wherein: a sealing sleeve (45) is movably arranged in the plurality of adjusting air inlets (41) and the adjusting air outlet (42), a spring (46) is arranged between the tail part of the sealing sleeve (45) and the convex ring (44), a plurality of elastic sealing rings (48) are arranged on the air inlets (31) and the air outlet (32), and when the sealing sleeve (45) is aligned to the air inlets (31) or the air outlet (32), the sealing sleeve (45) is tightly propped against the elastic sealing rings (48) for sealing.

5. The fan system for gas waste heat recovery of claim 1, wherein: slider actuating mechanism (8) include and follow the slide direction is provided with by accommodate motor (81) driven screw rod (82), screw rod (82) with slider (4) screw-thread fit, accommodate motor (81) rotate in order to adjust slider (4) is in position on slide (3).

6. The fan system for gas waste heat recovery of claim 1, wherein: slider actuating mechanism (8) include and follow slide (3) direction is provided with rack (83), be provided with on slider (4) by adjusting motor (81) driven gear (84), gear (84) with rack (83) combine, adjusting motor (81) rotate in order to adjust slider (4) are in position on slide (3).

7. The fan system for gas waste heat recovery of claim 1, wherein: and a main switch (910) is connected to two ends of the power supply (98).