CN111238283B

CN111238283B - Combined preheater with air filtering function

Info

Publication number: CN111238283B
Application number: CN202010056759.7A
Authority: CN
Inventors: 钱晨
Original assignee: Wuxi Sushenger Machinery Equipment Co ltd
Current assignee: Wuxi Sushenger Machinery Equipment Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2021-08-24
Anticipated expiration: 2040-01-19
Also published as: CN111238283A

Abstract

The invention relates to a combined preheater with a gas filtering function, which comprises a machine body, wherein both ends of the machine body are respectively provided with a gas inlet channel and a gas outlet channel, the top side of a filter pipe is provided with a abdicating port communicated with a cavity of the filter pipe, a filter disc is arranged in the filter pipe, a support frame is arranged in the filter pipe, and the support frame is fixedly connected to the inner side wall of the filter pipe; the filter disc comprises a fixed frame, an inner fixed pipe and a filter layer, the longitudinal section of the fixed frame is circular, the inner fixed pipe is positioned at the axis of the fixed frame, the filter layer is wound between the inner fixed pipe and the fixed frame, a rotating shaft is fixedly arranged in the inner fixed pipe in a penetrating manner, and the rotating shaft is rotatably connected to the support frame; the fixed cover of circumference lateral wall of fixed frame is equipped with the rotation ring gear, fixedly connected with supporting seat on the filter tube, is connected with driving motor on the supporting seat, and the cover is equipped with the drive gear that meshes in the rotation ring gear on driving motor's the output shaft. The invention has the advantages of filtering the gas entering the combined preheater and improving the gas cleanliness.

Description

Combined preheater with air filtering function

Technical Field

The invention relates to a combined preheater, in particular to a combined preheater with a gas filtering function.

Background

The steam-air preheater is a combined preheater, is a main auxiliary device in refuse burning power plant, biomass power plant and drying industry, and is a heat exchange device using steam as heat source. The working principle is that saturated steam or superheated steam is introduced into the heat exchange module, the steam is uniformly distributed to the heat exchange tubes through the inlet header, and condensate is collected to the outlet header after heat is released and is discharged through the drainage system; the heated medium air is generally sent (or introduced) into the preheater by a fan, heated to a specified temperature by the heat exchange tube and discharged, and then hot air is introduced into the hearth or the dryer by the air duct.

At present, Chinese patent with publication number CN203286917U discloses a steam air preheater, which comprises a box body and a serpentine tube type heat exchange tube, wherein an air inlet and an air outlet are arranged on the box body, and the inlet and the outlet of the serpentine tube type heat exchange tube are respectively connected with a steam inlet and a steam outlet outside the box body; the straight pipes forming the coiled pipe type heat exchange pipe are located in the box body, and two ends of each straight pipe extend out of the box body respectively, so that the U-shaped bent pipe connecting the adjacent straight pipes is located outside the box body, and the welding seam at the joint of the U-shaped bent pipe and the straight pipe is also located outside the box body.

Above-mentioned technical scheme sets up the U-shaped pipe of heat exchange tube outside the box, seals up the investigation to weld joint department easily, but in the in-service use process, contain more impurity usually in the waste gas, above-mentioned scheme can't filter impurity wherein, when the waste gas after the heating is when entering into next process and using, impurity can cause the corruption or damage to the equipment in the next process, influence the life of equipment, consequently, cleanliness factor after the waste gas heating is especially important to the life of sequent equipment.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the combined preheater with the gas filtering function, which has the advantages of filtering the gas entering the combined preheater and improving the gas cleanliness.

The above object of the present invention is achieved by the following technical solutions:

a combined preheater with a gas filtering function comprises a machine body, wherein an air inlet channel and an air outlet channel are respectively arranged at two ends of the machine body, the air inlet channel is communicated with a filter pipe, a abdicating port communicated with a cavity of the filter pipe is formed in the top side of the filter pipe, a filter disc is arranged in the filter pipe, the filter disc is perpendicular to the length direction of the filter pipe, the addicating port is penetrated from the top end of the filter disc, the bottom end of the filter disc is close to the inner side wall of the bottom side of the filter pipe, support frames are respectively arranged in the filter pipe and positioned at two sides of the filter disc, and the support frames are fixedly connected to the inner side wall of the filter pipe; the filter disc comprises a fixed frame, an inner fixed pipe and a filter layer, the longitudinal section of the fixed frame is circular, the inner fixed pipe is positioned at the axis of the fixed frame, the filter layer is wound between the inner fixed pipe and the fixed frame, a rotating shaft is fixedly arranged in the inner fixed pipe in a penetrating manner, and the rotating shaft is rotatably connected to the support frame; the fixed cover of circumference lateral wall of fixed frame is equipped with the rotation ring gear, fixedly connected with supporting seat on the filter tube, be connected with driving motor on the supporting seat, the cover is equipped with the drive gear that meshes in the rotation ring gear on driving motor's the output shaft.

Through adopting above-mentioned technical scheme, in the course of the work, waste gas gets into in the filter tube, and waste gas is at the in-process that the filter tube flows, realizes filtering through the filter disc, before getting into combined heater, has improved gaseous cleanliness factor. In addition, in the filtering process, the filtering disc is in a rotating state under the driving of the driving motor, the filtering disc in the rotating state can scatter the waste gas, the pressure from the waste gas is weakened, the waste gas can more uniformly pass through the filtering disc, the possibility that the local filtering pressure generated by the filtering disc is too large is reduced, and the service life of the filtering disc is prolonged.

The present invention in a preferred example may be further configured to: the filter tube is located the pipe shaft between filter disc and the inlet channel and is equipped with the baffler, the baffler is including opening and closing board, fixed plate and the lower board that opens and closes on from top to bottom sets gradually, the coexistence limit difference fixed connection of fixed plate is in two inside walls of filter tube, on open and close the board and open and close respectively the driving shaft with the board body of board down, the driving shaft is the level setting, the lateral wall of filter tube is worn out respectively at the both ends of driving shaft to and the side wall of filter tube between normal running fit, the filter tube is connected with and is used for driving shaft pivoted linkage motor, it has the through-hole to open the expert on the board body of fixed plate, the one side that the fixed plate deviates from the filter disc is connected with and passes through the communicating air supply pipe, the lateral wall and the intercommunication that the filter tube was stretched out to the air supply pipe has air inlet fan.

Through adopting above-mentioned technical scheme, in the in-process that lets in waste gas, the staff utilizes the linkage motor to make and opens and close the board and be the level form with lower opening and close the board, and the upper and lower both sides of fixed plate have the waste gas flow space this moment, and waste gas is behind the filter disc, can flow to the inlet channel in through the space of the upper and lower both sides of fixed plate. After using a period, adsorb impurity too much and when leading to the filter effect to descend on the filter disc, the staff stops the transport of waste gas, utilizes the linkage motor to make simultaneously and opens and close the board and open and close the board parallel to the fixed plate with down, and the three contradicts each other this moment, forms the baffler. Then, the staff starts air intake fan, and the air current that air intake fan produced blows to the filter disc, and opposite with the air inlet direction of waste gas, can carry out the blowback to its inside impurity from the inboard of filter disc to this makes impurity deviate from the filter disc, reaches the effect of clearance filter disc.

The present invention in a preferred example may be further configured to: wear to be equipped with the leading water pipe that one end opening one end was sealed dead in the filter tube, the leading water pipe is located one side that the filter disc deviates from the baffler, the leading water pipe is on a parallel with the filter disc, and the intercommunication has the shower nozzle towards the filter disc on its pipe shaft, the shower nozzle sets up to one side, the open end of leading water pipe is worn out the filter tube and is communicateed and have the water pump.

Through adopting above-mentioned technical scheme, after utilizing air intake fan to carry out the blowback to the filter disc, the water pump supplies water in towards the leading water pipe, and rivers pass through the shower nozzle and spout to the filter disc on for the impurity that is blown off by the air current and adsorbs on the filter disc surface obtains wasing, has further improved to this and has carried out abluent effect to the filter disc.

The present invention in a preferred example may be further configured to: an oil guide pipe is wound outside the pipe body of the air supply pipe, and heat conduction oil circulates in the oil guide pipe.

Through adopting above-mentioned technical scheme, the conduction oil can heat the air current that air inlet fan produced, after washing the filter disc, can weather the heating plate through the air current that has steam, has increased the drying rate of filter disc.

The present invention in a preferred example may be further configured to: the filter layer comprises a graphite layer and a fixed layer made of glass fiber sheets, the graphite layer is bonded to the fixed layer, and the fixed layer bonded with the graphite layer is wound on the inner fixed pipe.

By adopting the technical scheme, the graphite layer and the glass fiber sheet have good flexibility and are convenient to wind, and meanwhile, the graphite layer and the glass fiber sheet can resist high temperature and can bear the high temperature from waste gas. The fixed layer plays impurity filtering and fixed effect, and the graphite layer plays the effect of filtering miscellaneous flavor, and both cooperate jointly, have improved filterable effect.

The present invention in a preferred example may be further configured to: be equipped with the installation lath between the interval of support frame and filter disc respectively, installation lath fixed connection is in the inside wall of filter tube, and the installation lath on each inside wall is fixed connection in proper order end to end, it has the sealing rubber pipe to glue the joint on the installation lath, the lateral wall extrusion of sealing rubber pipe is in the filter disc.

Through adopting above-mentioned technical scheme, at filter disc pivoted in-process, the sealing rubber pipe laminating reaches sealed effect in the lateral wall of filter disc, has reduced the possibility that waste gas overflows through the interval between filter disc and the filter tube inside wall to this has improved the whole filterable volume of waste gas, has improved the purifying effect of waste gas.

The present invention in a preferred example may be further configured to: the top side of the filter pipe is fixedly connected with a sealing cover, the sealing cover covers the yielding position opening, and the part of the filter disc, which is exposed out of the yielding position opening, is positioned in the sealing cover.

Through adopting above-mentioned technical scheme, the sealed cowling can seal the mouth of stepping down to this has reduced waste gas and has passed through the filter disc and has stepped down the possibility that the clearance spills over between the mouth, has improved the utilization ratio of waste gas.

The present invention in a preferred example may be further configured to: the top and the bottom of fixed plate are fixedly connected with side shield respectively, the side shield is located the fixed plate and is close to one side of filter disc, the last board of opening and close and the one side of opening and close the board down towards the filter disc is spliced respectively to have sealing rubber pad.

Through adopting above-mentioned technical scheme, at last open and close the board with open and close the board down rotatory to being on a parallel with the fixed plate when, the side shield plays the restriction effect, can restrict and open and close the rotational position of board and lower open and close the board on, sealing rubber pad plays sealed effect simultaneously, can seal up opening and closing the clearance between board, fixed plate and the lower board of opening and close.

In summary, the invention includes at least one of the following beneficial technical effects:

1. in the process that the waste gas flows in the filter pipe, the waste gas is filtered by the filter disc, and before entering the combined preheater, the cleanliness of the gas is improved;

2. the filter disc is in a rotating state under the driving of the driving motor, the filter disc in the rotating state can break up waste gas, the pressure of the waste gas is weakened, the waste gas can uniformly pass through the filter disc, the possibility that the filter disc generates a phenomenon of overlarge local filtering pressure is reduced, and the service life of the filter disc is prolonged.

Drawings

Fig. 1 is a schematic structural diagram for embodying the present invention.

Fig. 2 is a sectional view for embodying an inner structure of a filter tube.

Fig. 3 is an enlarged view for embodying a portion a in fig. 2.

Fig. 4 is a schematic structural diagram for embodying the escape slot.

Fig. 5 is a schematic structural view for embodying a filter disk.

In the figure, 1, a machine body; 11. an air intake passage; 12. an air outlet channel; 2. a filter tube; 21. a let position port; 3. a filter tray; 31. a fixing frame; 311. a left semicircular frame; 312. a right semicircle frame; 313. rotating the gear ring; 32. an inner fixed tube; 321. a rotating shaft; 33. a filter layer; 331. a graphite layer; 332. a fixed layer; 4. a support frame; 5. a drive motor; 51. a supporting seat; 52. a drive gear; 6. installing a batten; 61. sealing the rubber tube; 7. a sealing cover; 8. a barrier plate; 81. an upper opening and closing plate; 82. a fixing plate; 821. a through port; 83. a lower opening and closing plate; 84. a drive shaft; 85. a linkage motor; 86. a gas supply pipe; 861. an oil guide pipe; 87. a side dam; 88. sealing the rubber pad; 9. a water conduit; 91. a spray head; 92. a water pump; 10. an air intake fan.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The invention discloses a combined preheater with a gas filtering function, which comprises a machine body 1 and a preheater body 2, wherein two ends of the machine body 1 are respectively communicated with a gas inlet channel 11 and a gas outlet channel 12. The intake passage 11 is connected to the filter pipe 2 by a bolt, and a relief port 21 (see fig. 4) communicating with a cavity of the filter pipe 2 is opened on a top side thereof. Be equipped with filter disc 3 in the filter tube 2, filter disc 3 perpendicular to filter tube 2's length direction, its top is worn out and is let a mouthful 21, and the bottom is close to the inside wall in filter tube 2 bottom side. And support frames 4 are respectively arranged in the filter pipe 2 and positioned on two sides of the filter disc 3, and the support frames 4 are fixedly connected on the inner side wall of the filter pipe 2 in a welding mode.

Referring to fig. 5, the filter tray 3 includes a fixing frame 31, an inner fixing tube 32, and a filter layer 33. The fixing frame 31 has a circular longitudinal section, and the inner fixing tube 32 is located at the axis of the fixing shaft. The filter layer 33 includes a graphite layer 331 and a fixing layer 332 made of a glass fiber sheet, the graphite layer 331 is bonded to the fixing layer 332, and the filter layer 33 is spirally wound between the inner fixing tube 32 and the fixing frame 31.

Referring to fig. 5, the fixing frame 31 includes a left semicircular frame 311 and a right semicircular frame 312, and the left semicircular frame 311 and the right semicircular frame 312 are fastened to each other by bolts. The filter layer 33 is firstly wrapped on the inner fixing pipe 32, then the worker tightens the left semicircular frame 311 and the right semicircular frame 312 on the filter layer 33, and the left semicircular frame 311 and the right semicircular frame 312 are locked by bolts, so that the tightening of the filter layer 33 is realized. The fixing layer 332 arranged in the filter layer 33 plays a role in fixing and filtering, and the graphite layer 331 plays a role in filtering and adsorbing, so that the content of impurities and foreign flavor in the gas is reduced, and the cleanness degree of the gas is improved.

Referring to fig. 5, a rotating shaft 321 is fixedly inserted into the inner fixing tube 32, and both ends of the rotating shaft 321 are rotatably connected to the supporting frames 4 on both sides of the transition plate through bearings. The outer side wall of the fixed frame 31 is fixedly sleeved with a rotating gear ring 313, the filter pipe 2 is welded with a supporting seat 51, the supporting seat 51 is connected with a driving motor 5 through bolts, and an output shaft of the driving motor 5 is in interference fit with a driving gear 52 meshed with the rotating gear ring 313.

Referring to fig. 2, during operation, exhaust gas enters the filter pipe 2 through the end of the filter pipe 2 far away from the air inlet channel 11, and during flowing, the exhaust gas is filtered by the filter disc 3. In the filtering process, the filtering disc 3 is in a rotating state under the driving of the driving motor 5, the filtering disc 3 in the rotating state can break up waste gas, the pressure from the waste gas is weakened, so that the waste gas can more uniformly pass through the filtering disc 3, the possibility that the filtering disc 3 generates a phenomenon of local filtering pressure is reduced, the service life of the filtering disc 3 is prolonged, and the service life of the filtering disc 3 for generating a filtering effect is prolonged.

Referring to fig. 2, mounting laths 6 are respectively arranged between the space between the supporting frame 4 and the filter disc 3, the mounting laths 6 are welded on the inner side walls of the filter pipes 2, and the mounting laths 6 on the inner side walls are sequentially and fixedly connected end to end. A sealing rubber tube 61 is glued to the mounting strip 6, and the side wall of the sealing rubber tube 61 is pressed against the filter disc 3.

Referring to fig. 2, in the process that waste gas passes through filter disc 3, sealing rubber tube 61 can seal the clearance between filter disc 3 and the inside wall of filter tube 2, has reduced the possibility that waste gas overflows through the interval between filter disc 3 and the inside wall of filter tube 2 to this further improved the filtration efficiency to waste gas, improved the holistic filter effect of waste gas.

Referring to fig. 2, a sealing cover 7 is fixedly connected to the top side of the filter tube 2, the sealing cover 7 covers the relief opening 21, and the part of the filter disc 3 exposed from the relief opening 21 is located in the sealing cover 7. In addition, in order to facilitate the output shaft of the driving motor 5 to enter the sealing cover 7, a hole for the input shaft of the driving motor 5 to enter is formed in the sealing cover 7, and the output shaft of the driving motor 5 is rotatably connected in the hole through a sealing bearing.

Referring to fig. 2 and 3, a blocking plate 8 is arranged in the pipe body of the filter pipe 2 between the filter disc 3 and the air inlet channel 11, and the blocking plate 8 comprises an upper opening and closing plate 81, a fixed plate 82 and a lower opening and closing plate 83 which are sequentially arranged from top to bottom. Two vertical edges of the fixed plate 82 are respectively and fixedly connected to two inner side walls of the filter pipe 2, driving shafts 84 are respectively welded on the plate bodies of the upper opening and closing plate 81 and the lower opening and closing plate 83, and the driving shafts 84 are horizontally arranged. Two ends of the driving shaft 84 respectively penetrate through the side wall of the filter pipe 2 and are in running fit with the side wall of the filter pipe 2 through bearings, a linkage motor 85 is connected outside the filter pipe 2, and an output shaft of the linkage motor 85 is coaxially fixed on the driving shaft 84.

Referring to fig. 2, a through hole 821 is opened on the plate body of the fixing plate 82, an air supply pipe 86 communicated with the through hole 821 is welded on one surface of the fixing plate 82 departing from the filter disc 3, and the air supply pipe 86 extends out of the outer side wall of the filter pipe 2 and is communicated with the air intake fan 10. In the process of introducing waste gas, the worker utilizes the linkage motor 85 to enable the upper opening and closing plate 81 and the lower opening and closing plate 83 to be horizontal, the upper side and the lower side of the fixing plate 82 are provided with waste gas flowing spaces, and waste gas can flow into the air inlet channel 11 through the spaces on the upper side and the lower side of the fixing plate 82 after passing through the filter disc 3.

Referring to fig. 2 and 3, after using for a period of time, when adsorbing impurity on the filter disc 3 too much and resulting in the filter effect to descend, the staff stops the transport of waste gas and pulls down the conveying pipeline who is connected with the one end of filter tube 2 far away from air intake duct 11, utilizes linkage motor 85 to make simultaneously and opens and close board 81 and lower and open and close board 83 and be on a parallel with fixed plate 82, and the three contradicts each other this moment, forms baffling board 8, forms the interlayer of separation air current in filter tube 2. Then, the staff starts air intake fan 10, and the air current that air intake fan 10 produced blows to filter disc 3, and the opposite direction of admitting air with waste gas can be followed filter disc 3's inboard and carried out the blowback to its inside impurity to this makes impurity deviate from filter disc 3, reaches the effect of clearance filter disc 3.

Referring to fig. 2, when the upper opening and closing plate 81 and the lower opening and closing plate 83 are attached to the fixing plate 82, in order to improve the sealing performance of the upper opening and closing plate 81 and the lower opening and closing plate 83 against the fixing plate 82, side baffles 87 are welded to the top and the bottom of the fixing plate 82 respectively, the side baffles 87 are located on one side of the fixing plate 82 close to the filter disc 3, and sealing rubber gaskets 88 are respectively glued to one surfaces of the upper opening and closing plate 81 and the lower opening and closing plate 83 facing the filter disc 3.

Referring to fig. 2 and 3, when the upper opening and closing plate 81 and the lower opening and closing plate 83 are parallel to the fixing plate 82, the side surfaces of the upper opening and closing plate 81 and the lower opening and closing plate 83 are attached to the side baffle 87, and the side baffle 87 can block gaps among the upper opening and closing plate 81, the fixing plate 82 and the lower opening and closing plate 83, so that a sealing effect is achieved, air flow generated by the air intake fan 10 can be applied to the filter disc 3 more, and the cleaning effect on the filter disc 3 is further improved.

Referring to fig. 2, a water conduit 9 with an open end and a sealed end is arranged in the filter pipe 2, and the water conduit 9 is located on one side of the filter disc 3 departing from the baffle plate 8. The water conduit 9 is parallel to the filter disc 3, the pipe body is communicated with a spray head 91 facing the filter disc 3, and the spray head 91 is obliquely and downwards arranged. The open end of the water conduit 9 passes through the filter pipe 2 and is communicated with a water pump 92. After utilizing air intake fan 10 to carry out the blowback to filter disc 3, water pump 92 supplies water in towards leading water pipe 9, and rivers spout to filter disc 3 through shower nozzle 91 on for the impurity that is blown off by the air current and adsorbs on filter disc 3 surface obtains wasing, has further improved to this and has carried out abluent effect to filter disc 3.

Referring to fig. 2, an oil guide pipe 861 is wound around the body of the air supply pipe 86, two ends of the oil guide pipe 861 extend out of the filter pipe 2, two ends of the oil guide pipe 861 are open, one end of the oil guide pipe is an oil inlet, the other end of the oil guide pipe is an oil outlet, and heat conduction oil circulates in the oil guide pipe 861 through the oil inlet and the oil storage port. After the filter disc 3 is washed, the worker starts the air inlet fan 10 again, meanwhile, heat conduction oil is guided into the oil guide pipe 861, the heat conduction oil can heat air flow generated by the air inlet fan 10, and therefore the air flow blowing to the filter disc 3 is hot air flow, and drying of the filter disc 3 is accelerated.

The implementation principle of the embodiment is as follows:

1. before waste gas gets into filter tube 2, the staff utilizes linkage motor 85 to make upper opening and close board 81 and lower opening and close board 83 be in the horizontality, then, starts the transport of waste gas, and waste gas is at first got into filter tube 2, and in the in-process of flowing, waste gas realizes filtering through filter disc 3. In the filtering process, the filter disc 3 is in a rotating state under the driving of the driving motor 5, and the filter disc 3 in the rotating state can scatter the waste gas and weaken the pressure from the waste gas;

2. when adsorbing more impurity on the filter disc 3, the staff stops the transport of waste gas, utilizes the linkage motor 85 to make simultaneously and opens and close board 81 and lower opening and close board 83 and laminate in side shield 87. Next, the worker starts the air inlet fan 10, air flow generated by the air inlet fan 10 blows to the filter disc 3, and back blowing is carried out on impurities in the filter disc 3, so that the impurities overflow from the filter disc 3 and are separated from or adsorbed on one side surface of the filter disc 3, which is far away from the air inlet channel 11;

3. close air intake fan 10, start water pump 92 simultaneously, water pump 92 spouts rivers to filter disc 3 surface for the impurity on filter disc 3 surface obtains wasing, and the staff closes water pump 92 and restarts air intake fan 10 after that, air intake fan 10 is in the course of the work, and the conduction oil gets into in oil pipe 861, and the conduction oil heats air intake fan 10's air current, and the air current after the heating blows to filter disc 3 on, realizes drying to filter disc 3, accomplishes the clearance to filter disc 3 with this.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a combination formula preheater with strain gas function, includes organism (1), the both ends of organism (1) are equipped with inlet channel (11) and outlet channel (12) respectively, its characterized in that: the air inlet channel (11) is communicated with a filter pipe (2), the top side of the filter pipe (2) is provided with a position-giving opening (21) communicated with the cavity of the filter pipe, a filter disc (3) is arranged in the filter pipe (2), the filter disc (3) is perpendicular to the length direction of the filter pipe (2), the top end of the filter disc (3) penetrates out of the position-giving opening (21), the bottom end of the filter disc is close to the inner side wall of the bottom side of the filter pipe (2), support frames (4) are respectively arranged in the filter pipe (2) and positioned at two sides of the filter disc (3), and the support frames (4) are fixedly connected to the inner side wall of the filter pipe (2); the filter disc (3) comprises a fixed frame (31), an inner fixed pipe (32) and a filter layer (33), the longitudinal section of the fixed frame (31) is circular, the inner fixed pipe (32) is located at the axis of the fixed frame (31), the filter layer (33) is wound between the inner fixed pipe (32) and the fixed frame (31), a rotating shaft (321) penetrates through the inner fixed pipe (32), and the rotating shaft (321) is rotatably connected to the support frame (4); the fixed cover of circumference lateral wall of fixed frame (31) is equipped with rotation ring gear (313), fixedly connected with supporting seat (51) on filter tube (2), be connected with driving motor (5) on supporting seat (51), the cover is equipped with drive gear (52) that mesh in rotation ring gear (313) on the output shaft of driving motor (5).

2. A combined preheater with a gas filtering function as set forth in claim 1, wherein: the filter tube (2) is arranged in a tube body between the filter disc (3) and the air inlet channel (11), the blocking plate (8) comprises an upper opening and closing plate (81), a fixed plate (82) and a lower opening and closing plate (83) which are sequentially arranged from top to bottom, two vertical edges of the fixed plate (82) are respectively and fixedly connected to two inner side walls of the filter tube (2), the upper opening and closing plate (81) and the lower opening and closing plate (83) are respectively and fixedly connected with a driving shaft (84), the driving shaft (84) is horizontally arranged, two ends of the driving shaft (84) penetrate through the side walls of the filter tube (2) respectively and are in rotating fit with the side walls of the filter tube (2), a linkage motor (85) used for driving the driving shaft (84) to rotate is connected to the outside of the filter tube (2), and a through opening (821) is formed in the plate body of the fixed plate (82), one side of the fixing plate (82) departing from the filter disc (3) is connected with an air supply pipe (86) communicated with the through hole (821), and the air supply pipe (86) extends out of the outer side wall of the filter pipe (2) and is communicated with an air inlet fan (10).

3. A combined preheater with a gas filtering function as set forth in claim 2, wherein: wear to be equipped with diversion pipe (9) that one end opening one end was sealed up in filter tube (2), diversion pipe (9) are located one side that filter disc (3) deviate from baffler (8), diversion pipe (9) are on a parallel with filter disc (3), and the intercommunication has shower nozzle (91) towards filter disc (3) on its pipe shaft, shower nozzle (91) set up to one side down, filter tube (2) and intercommunication have water pump (92) are worn out to the open end of diversion pipe (9).

4. A combined preheater with a gas filtering function as set forth in claim 3, wherein: an oil guide pipe (861) is wound outside the gas supply pipe (86), and heat conduction oil circulates in the oil guide pipe (861).

5. A combined preheater with a gas filtering function as set forth in claim 1, wherein: the filter layer (33) comprises a graphite layer (331) and a fixing layer (332) made of glass fiber sheets, the graphite layer (331) is adhered to the fixing layer (332), and the fixing layer (332) adhered with the graphite layer (331) is wound on the inner fixing tube (32).

6. A combined preheater with a gas filtering function as set forth in claim 1, wherein: be equipped with installation lath (6) between the interval of support frame (4) and filter disc (3) respectively, installation lath (6) fixed connection is in the inside wall of filter tube (2), and installation lath (6) head and the tail fixed connection in proper order on each inside wall, it has sealing rubber tube (61) to glue joint on installation lath (6), the lateral wall extrusion of sealing rubber tube (61) is in filter disc (3).

7. A combined preheater with a gas filtering function as set forth in claim 1, wherein: the top side fixedly connected with sealed cowling (7) of filter tube (2), sealed cowling (7) cover is established on letting a mouthful (21), the position that filter disc (3) leaked and let a mouthful (21) is located sealed cowling (7).

8. A combined preheater with a gas filtering function as set forth in claim 2, wherein: the top and the bottom of fixed plate (82) are fixedly connected with side shield (87) respectively, side shield (87) are located fixed plate (82) and are close to one side of filter disc (3), go up open and close board (81) and open and close board (83) down and glue respectively and have sealing rubber pad (88) towards the one side of filter disc (3).