Example: Figure 1 to 14 As shown in a boiler feed water preheating means includes an upper and lower direction extending flue 1, the shape of a section of the flue is rectangular. The flue is connected to a plurality of rotatable inside the heating tank by the rotation driving means 25, specifically, a plurality of heating tank 25 in the left-right direction are arranged, each heating tank 25 in the front-rear direction is provided, the heating the shape of the tank 25 is elongated, in the initial state, the heating water tank 25 arranged vertically thereon, the thickness of the both side edges decreases from the inside outwardly, when the heating tank 25 by 90 degrees, two adjacent the gap between the edge of the heating member of the tank 25 is small, reduce dust or smoke. Reduce dust.
 Specifically, the heating tank 25 at both ends of the middle shaft 16 are provided, the rotation shaft 1 is rotatably connected to the exhaust passage 16, and the projecting end of the shaft 16 of the flue boiler 1 with water supply means in communication or the shaft 16 is a hollow structure in which a shaft 16 located in the heating tank 25 inside the lower inlet 34 communicating, another shaft member 16 and the upper portion of the heating tank 25 inside outlet 33 in communication. In use, with the shaft 16 and the pump inlet 34 communicates in communication, the water outlet 33 communicating with the rotary shaft 16 communicates with the boiler, the support shaft 16 and simultaneously play the role of preheating the water delivery, compact structure. When the need for preheating the water, the water pump water into the heating tank water supply apparatus 25, the flue gas flue of the heating tank 1 through 25, to transfer heat from heating the tank 25, and thus the heating tank 25 water, through the heated water into the boiler, using residual heat of flue gas preheating boiler water, to improve the heat efficiency, save fuel. When the heating tank 25 in an upright state, the gap between two adjacent heating the water tank 25 is larger, the flue gas in a flue through faster, smoke and short contact time of the heating tank 25 ; when it is necessary to raise the heating temperature of water in the tank 25, the rotation driving means to start driving the heating tank 25 is rotated, the gap between two adjacent heating tank 25 reduced, reducing the exhaust passage 1 through the flue gas velocity, smoke gas longer contact time with the heated water tank 25, help to improve the heat efficiency. In actual use, according to different requirements, to vary the inclination angle of the heating tank 25, in order to achieve a reasonable flue gas water heating efficiency and discharge efficiency, optimal balancing effect.
The rotary drive means includes a motor disposed outside the exhaust passage 1 41, the output of the drive motor 41 is connected with a first shaft 8, the third pulley 23 is provided with a first shaft 8, the said fourth pulley 36 is provided on the rotary shaft 16, the first belt shaft 36 is wound between the pulley 8 and the second plurality of fourth belt 22. In use, the motor 41 is driven to rotate with the first shaft 8 and rotated by a second drive belt 22 rotating shaft 16, the tank 25 is heated to achieve deflection.
 Said side walls having at least a portion of the exhaust passage 1 has an inner plate 19 and outer plate 20, the inner plate 19 and outer plate 20 between the cavity 18, the third pulley 23, pulley 36 and the fourth the second belt 22 is located within cavity 18. The optimal selection, the rotation shaft is provided between the refractory fiber felt ring 1916 and the inner panel 35, using the prior art refractory fiber, this is not repeated herein. The effect of the gap between the refractory fiber felt 19 ring seal 35 from the support shaft 16 and the inner panel, avoiding the flue gas into the cavity 18, the third bearing 39 is provided between the shaft 2016 and the outer plate. In use, the third pulley 23, a fourth pulley 36 and belt 22 is located within the second cavity 18, to reduce the interference between the movable member and the outside member, to improve the reliability.
 1 outside the exhaust passage slidably connected to a second shuttle drive means, and is positioned below the shaft 16 pipes 3, 3 and the pipes or boiler water supply means communicating, an outer Specifically, the flue 2 is provided with a plurality of guide shoe, the guide slide hole tolerance pipes 3 defines the two activities, the sliding shape of the hole is rectangular, the pipes 3 and the slide hole fitting portion is rectangular. Said second drive means includes a second reciprocating cylinder, a second cylinder prior art, this is not repeated herein.
 The pipes 3 and the upper portion of the rotary shaft 16 connected to bellows 17 extends between the lower end side of the exhaust passage 1, the output of the motor drive 41 is also connected to a drive gear 11, the rotation of the outer flue 1 connected to a transmission gear set 11 can be meshed with the driving gear 12, the input pipe 3 is provided with teeth of the transmission gear set 12 engaged. In use, the motor 41 while driving the heating tank 25 is deflected, moving the drive pipes 3, e.g., the rotational shaft 16 counterclockwise, the shaft 16 is connected to a side of the bellows 17 to the right, the pipes 3 corresponding to the right, reducing distortion 17 due to relative movement between the pipes 3 and the rotary shaft 16 caused by the bellows, the bellows 17 is to improve the life.
 The motor 41 is located below the transport pipe 3, the output of the motor 41 is provided with a second shaft 10, the second pulley 38 is provided with a second shaft 10, with the first shaft 8 provided on a first pulley 37, the first pulley 37 and second pulley belt 9 is wound between a first 38, a second bearing 21 is provided between the second tape shaft 20 and the outer plate 10, the the first bearing 24 is provided between said first tape shaft 20 and the outer panel 8. In use, the motor drive shaft 41 by a second belt 10 which in turn drives a first tape shaft 8, the motor 41 is located below the transport pipe 3, and to reduce the rotation shaft 3 is located above the pipes or bellows 16 of the interferometer 17, to improve the reliability sex.
 The pipes 3 relative to the first upper portion has a plurality of arcuate plate 13 and the second curved plate 14, the bellows 17 is positioned between the first arcuate plate 14 and the second arcuate plate 13, a first edge of the arcuate plate 13 and the second curved plate 14 is provided with a stopper plate 15, the stopper plate 15 for preventing the bellows 17 coming out of the first arcuate plate 13 or the second arcuate plate 14. In use, the first arcuate plate 13 and the second plate 14 with the arcuate motion pipes 3, for providing the guide bellows 17, e.g., the shaft 16 rotates counterclockwise, the shaft 16 is connected to the bellows 17 to the right side of the respective pipes 3 moves to the right, the first arcuate plate 13 push the bellows 17, the bellows 17 along a first arcuate plate 13 is formed an arcuate transition, bellows 17 to avoid excessive bending damage, improve the service life of the bellows 17.
 1 the left and right side walls of each exhaust passage 26 defines an opening, the opening width of the same width and the inner side of the flue 26. The flue 1 left and right outer sides are slidably connected to two reciprocating drive means driven by the first push rod 4, the first reciprocating drive means includes a first cylinder, the first cylinder using the prior art , not repeat them here.
 The pull-push rod can be provided to close the opening 32 of the shutter 26, the push rod is hinged on the swing plate 4 is also driven by a pivot drive means 27, Specifically, the pivot drive means includes a cylinder 6, the upper 4 cylinder block 4 with the push rod 6 is articulated, the cylinder of the jack 6 and the swing plate 27 is hinged. In use, the cylinder 27 drives the wobble plate 6 motion. The wobble plate 27 slidably connected to the lower end of the movable plate 29, the lower end of the movable plate 29 is connected to the brush body 30, the pressure sensor 28 is provided between the pivot plate 27 and movable plate 29, a lower opening 26 provided on the outside dust box 7. The push-pull rod 4 is provided on the dust-proof plate 40, an end portion of the dust-proof plate 40 and the shutter plate 32 is connected to the dust-plate 40 side into contact with the upper edge of the opening 26. The push rod 4 projects into the opening 26, the shutter plate 32 is closed risk side push-pull rod 4, above the dust-proof plate 40 closing the push rod 4, to reduce the leakage of flue gas through the opening 26.
 In use, the deflection of the heating tank 25, the push rod 4 projects into the opening 26, at this time, the swing plate 27 in the inclined state, not in contact with the heating body 30 of the brush tank 25, when the push rod 4 backoff when the motion of wobble plate 27, the heating member 30 in contact with the brush tank 25, with the movement of the push rod 4, the brush 30 brush dust on a heated water tank 25 in addition, when the brush body 30 is moved to the two heating between the tank 25 when the pressure between the body 30 and the heating tank 25 of brush decreases, the pressure sensor 28 signals this case, the operation cylinder 6, pushing the swing plate 27, the brush holder body 30 of the heating tank 25 between the pressure, it will help improve the cleaning effect, finally, brushing dust into the dust box 7, to facilitate processing.
 The swing plate 31 is provided on the intake pipe 27, the intake pipe 31 is connected to the cleaner through the suction pipe 5, into the upper end of a length greater than the length of the lower end of the pipe 31, the vacuum cleaner using the prior art, this No longer. When used, use a vacuum cleaner dust sucked out in time, help to improve the cleaning effect.
 In actual use, the heating can first tank 25 side is deflected to heat the other side of the water tank 25 is not deflected, clean heated water tank 25 of the left side, the right side of the flue gas can be discharged through convenient downtime for cleanup .