CN113457797A

CN113457797A - Fly ash ultrafine powder grinding system

Info

Publication number: CN113457797A
Application number: CN202110752603.7A
Authority: CN
Inventors: 林忠; 谷建可; 刘玉中; 刘锋
Original assignee: Sinoma Suzhou Construction Co ltd
Current assignee: Sinoma Suzhou Construction Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-10-01

Abstract

The invention discloses a fly ash ultrafine powder grinding system which comprises a storage bin, a secondary crushing device positioned on one side of the storage bin, a cyclone separator positioned on one side of the secondary crushing device and a dust remover positioned on one side of a rotary separator, wherein a first crushing knife and a second crushing knife are arranged in the storage bin, and a vibrating piece is fixed on one side of the storage bin; the bottom of feed bin is fixed with reciprocal material feeding unit, should reciprocal material feeding unit include reciprocating motor and be located in the casing and with reciprocating motor fixed connection's connecting rod, the one end of connecting rod is fixed with the piston, reciprocating motor carries out the propelling movement through connecting rod drive piston to the fly ash in the casing for carry the pulverized coal ash. According to the invention, through the matching of the vibrating piece and the first crushing knife and the second crushing knife and the design of the reciprocating feeding device, the technical problems that the pulverized fuel ash is not crushed thoroughly and cannot be conveyed in a metering manner are solved.

Description

Fly ash ultrafine powder grinding system

Technical Field

The invention relates to the field of fly ash production, in particular to a fly ash ultrafine powder grinding system.

Background

The fly ash is fine ash collected from flue gas generated after coal combustion, is main solid waste discharged by a coal-fired power plant, and has the advantages that the yield of the fly ash is increased along with the development of the industry, the conventional fly ash treatment is usually distributed, the automation degree is low, the equipment process with high automation degree is complex, the cost is high, and therefore equipment which can treat the fly ash and is simple in process and convenient for personnel to operate is required to be provided.

Disclosure of Invention

In order to solve the technical problems, the invention provides a pulverized coal ash ultrafine powder grinding system which can more conveniently and quickly process pulverized coal to form ultrafine powder.

The technical scheme of the invention is as follows: a fly ash ultrafine powder grinding system comprises a storage bin, wherein a grinding mechanism is arranged in the storage bin, the grinding mechanism comprises a rotatable motor shaft and a transmission shaft, a first grinding cutter is uniformly arranged on the motor shaft, a second grinding cutter is uniformly arranged on the transmission shaft, and fly ash in the storage bin can be scattered through the rotation of the first grinding cutter and the second grinding cutter;

a vibration piece is fixed on the outer side of the bin, a buffer mechanism matched with the vibration piece for use is arranged on the periphery of the bin, and the fly ash in the bin is loosened through the vibration piece, so that the first crushing knife and the second crushing knife can crush conveniently;

the buffering mechanism comprises a first support which is elastically connected below the storage bin, a first fixed seat is arranged in the first support, a plurality of grooves are uniformly formed in the periphery of the inner side of the first fixed seat, an elastic part matched with the grooves is arranged in the grooves, the elastic part comprises a roller and a supporting rod, the end part of the supporting rod is fixedly connected with the roller, the other end of the supporting rod penetrates into the grooves, the roller is elastically connected with the grooves through springs, so that the lower part of the storage bin is elastically supported, and the vibrating part can conveniently loose the coal ash in the storage bin;

be equipped with in the first support and be fixed in the reciprocal material feeding unit of feed bin bottom, reciprocal material feeding unit include with the casing that the feed bin is linked together, be fixed in the reciprocating motor in the casing outside and be located in the casing and with reciprocating motor fixed connection's connecting rod, the one end of connecting rod is fixed with the piston, reciprocating motor carries out the propelling movement through connecting rod drive piston to the fly ash in the casing for carry the fly ash after smashing.

Further, the feed bin is the toper structure that the upper end diameter is greater than the bottom diameter, first fixing base is fixed in the surface of feed bin, just first fixing base is for the cooperation the shape structure of feed bin.

Furthermore, a second fixing seat is further arranged around the storage bin, the second fixing seat is located above the first fixing seat, and the shape and structure of the second fixing seat are the same as those of the first fixing seat.

Furthermore, the structure of the first crushing knife is the same as that of the second crushing knife, and the first crushing knife and the second crushing knife are alternately arranged to break up the fly ash in the storage bin.

Furthermore, a secondary crushing device capable of secondarily crushing the fly ash is arranged on one side of the shell, the secondary crushing device comprises a box body connected with the shell through a pipeline, a crushing table is arranged on the inner side of the box body and consists of an upper grinding disc and a lower grinding disc, a first driving motor is arranged at the upper end of the box body, and a transmission shaft of the driving motor penetrates into the box body and is fixedly connected with the upper grinding disc; a second driving motor is arranged at the bottom of the box body, and a transmission shaft of the second driving motor penetrates into the box body and is fixedly connected with the lower grinding disc; the first driving motor and the second driving motor respectively drive the upper grinding disc and the lower grinding disc to rotate so as to grind the fly ash between the upper grinding disc and the lower grinding disc for the second time.

Further, the first driving motor and the second driving motor rotate in opposite directions and have the same rotating speed.

Furthermore, the top of runner stone is equipped with the through hole, just the bottom of runner stone is equipped with the cooperation the arc wall that the through hole used, the arc wall surface extremely the height of arc wall bottom portion is followed the through hole is the center, reduces to all around gradually to carry the fly ash in the through hole to the surface of runner stone down.

Further, the bottom of runner stone evenly is equipped with a plurality of first slots, the top of mill down evenly is equipped with a plurality of cooperations the second slot that the slot used, when runner stone and mill down rotated, first slot with the second slot grinds to grind the fly ash between runner stone and the mill down.

Further, a collecting box located below the lower grinding disc is further arranged in the box body and used for collecting the ground coal ash, and one side of the collecting box is connected with a cyclone separator through a pipeline.

Further, cyclone includes the separator box, be equipped with the filter screen in the separator box, the top of filter screen is equipped with conical hopper, just conical hopper passes the separator box is connected with the rotating fan, there is the dust remover one side of rotating fan through the pipe connection, the rotating fan drive dust in the separator box passes through the pipeline and carries to the dust remover in to the fly ash in the separator box is collected.

The beneficial technical effects of the invention are as follows:

1. be equipped with rubbing crusher in the feed bin and construct, wherein, rubbing crusher constructs including rotatable motor shaft and transmission shaft, evenly is equipped with first crushing sword on the motor shaft, evenly is equipped with the crushing sword of second on the transmission shaft, smashes the sword cooperation through first crushing sword and second and rotates, can break up the fly ash in the feed bin. Further, the structure of first crushing sword with the same of the crushing sword of second, just first crushing sword with the crushing sword of second sets up in turn, in order to right fly ash in the feed bin is broken up, and simultaneously, the length through the length with first crushing sword and the length of the crushing sword of second shorten gradually to the shape structure of cooperation feed bin designs, can be abundant break up the fly ash in the feed bin.

2. The outside of feed bin is fixed with vibrations piece, and be equipped with the buffer gear that this vibrations piece of cooperation used around the feed bin, wherein, this buffer gear first support, be equipped with first fixing base in the first support, first fixing base inboard evenly is equipped with a plurality of recesses all around, elastic connection has the roller in this recess, utilize the surface of roller and the surface contact of feed bin, and through the elastic component in the recess, in order to cushion feed bin itself, and simultaneously, through the use of vibrations piece, can improve the looseness of the fly ash in the feed bin, improve the efficiency of breaing up of first crushing sword and the crushing sword of second.

3. Be equipped with the reciprocal material feeding unit who is fixed in the feed bin bottom in the first support, this reciprocal material feeding unit includes the casing that is linked together with the feed bin bottom and the reciprocating motor who is fixed in the casing outside, reciprocating motor's transmission shaft penetrates in the casing and fixedly connected with cam, the surperficial swing joint of cam has the connecting rod, the end fixing of connecting rod has the piston, reciprocating motor drive cam drives the connecting rod and rotates, thereby drive the piston and be reciprocating motion in the casing, so that will follow the fly ash that the feed bin got into in the casing and carry, furthermore, play the effect of measurement, the fly ash after the continuity will breaking up is carried to next station.

4. One side of casing is equipped with can carry out the secondary crushing's with fly ash second grade reducing mechanism, this second grade reducing mechanism include with casing pipe connection's box is equipped with crushing platform in the box, wherein, crushing platform includes runner stone and lower mill, the runner stone is rotatory through the first driving motor control that is located the box top, the second driving motor control that the lower mill is through being located the box below is rotatory, thereby turn to the same of opposite rotational speed through runner stone and lower mill and polish, thereby in order to accomplish the reprocess to fly ash, make the fineness of fly ash promote a grade once more.

5. The top of runner stone is equipped with the through hole, and the bottom of runner stone is equipped with the arc wall that this through hole of cooperation used, and wherein the surface of arc wall highly follows the through hole to the arc tank bottom and for the center, reduces to all around gradually to be convenient for carry the fly ash in the through hole to mill surface down, conveniently grind.

6. The cyclone separator comprises a separation box, a filter screen is arranged in the separation box, a conical funnel is arranged above the filter screen, the conical funnel penetrates through the separation box and is connected with a rotary fan, one side of the rotary fan is connected with a dust remover through a pipeline, and the rotary fan drives dust in the separation box to be conveyed into the dust remover through the pipeline so as to collect fly ash in the separation box; so as to separate the fine-grained pulverized coal and dust in the separation box, and further collect the grinded fine-grained pulverized coal.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the interior of the first fixing base according to the present invention;

FIG. 3 is a schematic view of the interior of the reciprocating feeding apparatus of the present invention;

FIG. 4 is a schematic view showing the structure of the inside of the secondary pulverization apparatus of the present invention;

fig. 5 is a schematic view of the structure of the inside of the cyclone separator of the present invention.

The reference signs are:

1. a first bracket; 2. a storage bin; 3. a motor shaft; 4. a drive shaft; 5. a first crushing cutter; 6. a second crushing cutter; 7. vibrating a motor; 8. a first fixed seat; 9. a second fixed seat; 10. a reciprocating feeding device; 11. a secondary crushing device; 12. a cyclone separator; 13. a dust remover; 14. a pipeline; 15. a housing; 16. a reciprocating motor; 17. a cam; 18. a connecting rod; 19. a piston; 20. a box body; 21. an upper grinding disc; 22. a lower grinding disc; 23. a first drive motor; 24. a second drive motor; 25. a collection box; 26. a through hole; 27. an arc-shaped slot; 28. a separation tank; 29. a filter screen; 30. a conical funnel; 31. rotating a fan; 32. a groove; 33. a roller; 34. a support bar; 35. a spring.

Detailed Description

In order to make the technical means of the present invention clearer and to make the technical means of the present invention capable of being implemented according to the content of the specification, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples, which are provided for illustrating the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the invention specifically relates to a pulverized fuel ash ultrafine powder grinding system, which comprises a storage bin 2, wherein a grinding mechanism is arranged in the storage bin 2, the grinding mechanism comprises a rotatable motor shaft 3 and a transmission shaft 4, a first grinding cutter 5 is uniformly arranged on the motor shaft 3, a second grinding cutter 6 is uniformly arranged on the transmission shaft 4, and pulverized fuel ash in the storage bin 2 can be scattered through the rotation of the first grinding cutter 5 and the second grinding cutter 6;

a vibration piece is fixed on the outer side of the bin 2, a buffer mechanism matched with the vibration piece for use is arranged on the periphery of the bin 2, and the fly ash in the bin 2 is loosened through the vibration piece, so that the first crushing knife 5 and the second crushing knife 6 can crush conveniently;

it should be noted that this vibrations piece is shock dynamo 7, fixes shock dynamo 7 in one side of feed bin 2, thereby starts shock dynamo 7 and drives feed bin 2 and shake together, can provide the relaxation degree of the fly ash in feed bin 2 to be convenient for first crushing sword 5 and the second smash the more abundant fly ash to in the feed bin 2 and break up the grinding.

As shown in fig. 1 and 2, buffer gear include elastic connection in first support 1 of 2 below in the feed bin, be equipped with first fixing base 8 in

first support

1, 8 inboard evenly are equipped with a plurality of recesses 32 all around of first fixing base, just the inside elastic component that uses of cooperation that is equipped with of recess 32, the elastic component includes roller 33 and bracing piece 34, the tip of bracing piece 34 with roller 33 fixed connection, just the other end of bracing piece 34 penetrates in the recess 32, and will through spring 35 roller 33 with recess 32 elastic connection carries out elastic support to the below of feed bin 2, is convenient for it is right to shake the piece fly ash in the feed bin 2 relaxes, improves the efficiency of breaing up of first crushing sword 5 and the second crushing sword 6.

As shown in fig. 1 and 3, a reciprocating feeding device 10 fixed at the bottom of the bunker 2 is arranged in the first support 1, the reciprocating feeding device 10 includes a housing 15 communicated with the bunker 2, a reciprocating motor 16 fixed at the outer side of the housing 15, and a connecting rod 18 located in the housing 15 and fixedly connected with the reciprocating motor 16, a piston 19 is fixed at one end of the connecting rod 18, and the reciprocating motor 16 drives the piston 19 through the connecting rod 18 to push the pulverized fuel ash in the housing 15, so as to convey the pulverized fuel ash.

It should be noted that the transmission shaft 4 of the reciprocating motor 16 penetrates into the housing 15 and is fixedly connected with the cam 17, the surface of the cam 17 is movably connected with the connecting rod 18, the end of the connecting rod 18 is fixed with the piston 19, the reciprocating motor 16 drives the cam 17 to drive the connecting rod 18 to rotate, so as to drive the piston 19 to reciprocate in the housing 15, so that the fly ash entering the housing 15 from the storage bin 2 is conveyed, further, the metering function is achieved, and the scattered fly ash is continuously conveyed to the next station; meanwhile, the amount of the fly ash conveyed each time is not too large, and the fineness of the fly ash can be fully improved to one level again by secondary grinding of subsequent stations.

The design of the reciprocating feeding device 10 is various, and may be a connecting rod drive, a screw rod drive or a cylinder drive, in this embodiment, it is preferable that the reciprocating motor 16 drives the connecting rod 18 and drives the piston 19 to reciprocate through the cam 17.

As shown in fig. 1, the bunker 2 is a conical structure with an upper end diameter larger than a bottom diameter, the first fixing seat 8 is fixed on the surface of the bunker 2, and the first fixing seat 8 is matched with the shape structure of the bunker 2.

Still be equipped with second fixing base 9 around the feed bin 2, second fixing base 9 is located first fixing base 8's top, just second fixing base 9's shape structure with first fixing base 8 is the same.

It should be noted that, the second fixing seat 9 is fixed in the first support 1 as well, and is matched with the first fixing seat 8 and the first fixing seat 8, so that the storage bin 2 can be stabilized, and meanwhile, when the vibration motor 7 drives the storage bin 2 to vibrate, the storage bin 2 which cannot be separated from the support.

The structure of the first crushing cutter 5 is the same as that of the second crushing cutter 6, and the first crushing cutter 5 and the second crushing cutter 6 are alternately arranged to break up the fly ash in the storage bin 2.

As shown in fig. 1 and 4, a secondary crushing device 11 capable of secondarily crushing the fly ash is arranged on one side of the casing 15, the secondary crushing device 11 includes a box 20 connected to the pipeline 14 of the casing 15, a crushing table is arranged inside the box 20, the crushing table is composed of an upper grinding disc 21 and a lower grinding disc 22, a first driving motor 23 is arranged at the upper end of the box 20, and a transmission shaft 4 of the driving motor penetrates into the box 20 and is fixedly connected to the upper grinding disc 21; a second driving motor 24 is arranged at the bottom of the box body 20, and a transmission shaft 4 of the second driving motor 24 penetrates into the box body 20 and is fixedly connected with the lower grinding disc 22; the first driving motor 23 and the second driving motor 24 respectively drive the upper grinding disc 21 and the lower grinding disc 22 to rotate so as to perform secondary grinding on the fly ash between the upper grinding disc 21 and the lower grinding disc 22.

The first driving motor 23 and the second driving motor 24 are opposite in rotation direction and same in rotation speed, so that the pulverized coal between the upper grinding disc 21 and the lower grinding disc 22 can be sufficiently ground when the upper grinding disc 21 and the lower grinding disc 22 grind.

The top of the upper grinding disc 21 is provided with a through hole 26, the bottom of the upper grinding disc 21 is provided with an arc groove 27 matched with the through hole 26 for use, and the height from the surface of the arc groove 27 to the bottom of the arc groove 27 is gradually reduced towards the periphery along the through hole 26 so as to convey the fly ash in the through hole 26 to the surface of the lower grinding disc 22.

The bottom of runner stone 21 evenly is equipped with a plurality of first slots, the top of lower mill 22 evenly is equipped with a plurality of cooperations the second slot that the slot used, when runner stone 21 rotated with lower mill 22, first slot with the second slot grinds to grind the fly ash between runner stone 21 and the lower mill 22.

A collecting box 25 positioned below the lower grinding disc 22 is also arranged in the box body 20 and used for collecting the ground fly ash, and a cyclone separator 12 is connected to one side of the collecting box 25 through a pipeline 14.

As shown in fig. 5, the cyclone separator 12 includes a separation box 28, a filter screen 29 is disposed in the separation box 28, a conical funnel 30 is disposed above the filter screen 29, the conical funnel 30 passes through the separation box 28 and is connected to a rotary fan 31, one side of the rotary fan 31 is connected to the dust remover 13 through a pipe 14, and the rotary fan 31 drives the dust in the separation box 28 to be conveyed into the dust remover 13 through the pipe 14 so as to collect the fly ash in the separation box 28.

The working process of the invention is as follows:

1. firstly, the fly ash is placed in the silo 2, the vibration piece drives the silo 2 body to vibrate, and the first crushing knife 5 and the second crushing knife 6 in the silo 2 are driven by the motor shaft 3 to break up and grind the fly ash in the silo 2.

2. After repeated grinding, the reciprocating motor 16 is started, the reciprocating motor 16 drives the connecting rod 18 through the cam 17 to drive the piston 19 to reciprocate in the shell 15, so that the fly ash falling into the shell 15 from the bottom of the storage bin 2 is conveyed, and metering and conveying are further completed.

3. The fly ash conveyed by the piston 19 driven by the reciprocating motor 16 falls into the upper grinding disc 21 and falls into the arc-shaped groove 27 through the through hole 26 of the upper grinding disc 21, at this time, the first driving motor 23 drives the upper grinding disc 21 to rotate, and the second driving motor 24 drives the lower grinding disc 22 to rotate, so that the fly ash is positioned between the upper grinding disc 21 and the lower grinding disc 22, and is fully ground through the first groove positioned at the bottom of the upper grinding disc 21 and the second groove positioned at the top of the lower grinding disc 22.

4. The pulverized fly ash falls into the collection box 25 for collection, and at the same time, the rotary fan 31 located at the bottom of the separation box 28 is started to drive the dust generated after the grinding into the dust collector 13, so as to separate the fine particle fly ash from the dust.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The coal ash ultrafine powder grinding system is characterized by comprising a storage bin (2), wherein a grinding mechanism is arranged in the storage bin (2), the grinding mechanism comprises a rotatable motor shaft (3) and a transmission shaft (4), a first grinding cutter (5) is uniformly arranged on the motor shaft (3), a second grinding cutter (6) is uniformly arranged on the transmission shaft (4), and the coal ash in the storage bin (2) can be scattered through the rotation of the first grinding cutter (5) and the second grinding cutter (6);

a vibration piece is fixed on the outer side of the stock bin (2), a buffer mechanism matched with the vibration piece for use is arranged on the periphery of the stock bin (2), and the fly ash in the stock bin (2) is loosened through the vibration piece, so that the first crushing knife (5) and the second crushing knife (6) can crush conveniently;

the buffer mechanism comprises a first support (1) which is elastically connected below the storage bin (2), a first fixing seat (8) is arranged in the first support (1), a plurality of grooves (32) are uniformly formed in the periphery of the inner side of the first fixing seat (8), an elastic part matched with the grooves for use is arranged in each groove (32), the elastic part comprises a roller (33) and a supporting rod (34), the end part of each supporting rod (34) is fixedly connected with the roller (33), the other end of each supporting rod (34) penetrates into each groove (32), and the rollers (33) are elastically connected with the grooves (32) through springs (35) so as to elastically support the lower part of the storage bin (2), so that the vibration part can easily loosen the fly ash in the storage bin (2);

be equipped with in first support (1) and be fixed in reciprocal material feeding unit (10) of feed bin (2) bottom, reciprocal material feeding unit (10) include with casing (15) that feed bin (2) are linked together, be fixed in reciprocating motor (16) in casing (15) outside and be located in casing (15) and with reciprocating motor (16) fixed connection's connecting rod (18), the one end of connecting rod (18) is fixed with piston (19), reciprocating motor (16) carry out the propelling movement through connecting rod (18) drive piston (19) to the fly ash in casing (15) for carry the fly ash after smashing.

2. The system for grinding the fly ash micropowder according to claim 1, wherein the silo (2) is of a conical structure with the upper end diameter larger than the bottom diameter, the first fixed seat (8) is fixed on the surface of the silo (2), and the first fixed seat (8) is of a shape structure matched with the silo (2).

3. The fly ash ultrafine powder grinding system according to claim 2, characterized in that a second fixed seat (9) is further provided around the storage bin (2), the second fixed seat (9) is located above the first fixed seat (8), and the shape and structure of the second fixed seat (9) are the same as those of the first fixed seat (8).

4. The fly ash micropowder grinding system according to claim 1, wherein the first pulverizing cutter (5) has the same structure as the second pulverizing cutter (6), and the first pulverizing cutter (5) and the second pulverizing cutter (6) are alternately arranged to scatter the fly ash in the silo (2).

5. The fly ash ultrafine powder grinding system according to claim 1, wherein one side of the casing (15) is provided with a secondary grinding device (11) capable of secondarily grinding fly ash, the secondary grinding device (11) comprises a box body (20) connected with a pipeline (14) of the casing (15), a grinding table is arranged on the inner side of the box body (20), the grinding table consists of an upper grinding disc (21) and a lower grinding disc (22), the upper end of the box body (20) is provided with a first driving motor (23), and a transmission shaft (4) of the driving motor penetrates into the box body (20) and is fixedly connected with the upper grinding disc (21); a second driving motor (24) is arranged at the bottom of the box body (20), and a transmission shaft (4) of the second driving motor (24) penetrates into the box body (20) and is fixedly connected with the lower grinding disc (22); the first driving motor (23) and the second driving motor (24) respectively drive the upper grinding disc (21) and the lower grinding disc (22) to rotate so as to grind the fly ash between the upper grinding disc (21) and the lower grinding disc (22) for the second time.

6. The fly ash micropowder grinding system of claim 5 wherein the first drive motor (23) and the second drive motor (24) are counter-rotating and rotate at the same speed.

7. The fly ash ultrafine powder grinding system according to claim 5, wherein a through hole (26) is formed in the top of the upper grinding disc (21), an arc-shaped groove (27) matched with the through hole (26) is formed in the bottom of the upper grinding disc (21), and the height from the surface of the arc-shaped groove (27) to the bottom of the arc-shaped groove (27) is gradually reduced towards the periphery along the through hole (26) so as to convey fly ash in the through hole (26) to the surface of the lower grinding disc (22).

8. The fly ash ultra fine powder grinding system as claimed in claim 7, wherein a plurality of first grooves are uniformly formed at the bottom of the upper grinding disc (21), a plurality of second grooves matched with the grooves are uniformly formed at the top of the lower grinding disc (22), and when the upper grinding disc (21) and the lower grinding disc (22) rotate, the first grooves and the second grooves grind to grind the fly ash between the upper grinding disc (21) and the lower grinding disc (22).

9. The fly ash ultra fine powder grinding system as set forth in any one of claims 5 to 8, wherein a collecting box (25) is further provided in the box body (20) below the lower grinding disc (22) for collecting the ground fly ash, and a cyclone (12) is connected to one side of the collecting box (25) through a pipe (14).

10. The fly ash ultra fine powder grinding system as set forth in claim 9, wherein the cyclone separator (12) comprises a separation box (28), a filter screen (29) is arranged in the separation box (28), a conical funnel (30) is arranged above the filter screen (29), a rotary fan (31) is connected to the conical funnel (30) through the separation box (28), a dust collector (13) is connected to one side of the rotary fan (31) through a pipeline (14), and the rotary fan (31) drives dust in the separation box (28) to be conveyed into the dust collector (13) through the pipeline (14) so as to collect fly ash in the separation box (28).