CN116428734B

CN116428734B - Air heater

Info

Publication number: CN116428734B
Application number: CN202310700005.4A
Authority: CN
Inventors: 李彤; 接柏年; 赵艳涛; 张营; 翟学广; 杨波
Original assignee: Taian North Washing Products Co ltd
Current assignee: Taian North Washing Products Co ltd
Priority date: 2023-06-14
Filing date: 2023-06-14
Publication date: 2023-08-18
Anticipated expiration: 2043-06-14
Also published as: CN116428734A

Abstract

The invention relates to an air heater, which belongs to the technical field of air heating, wherein an ash scraping piece is suitable for scraping ash on the surface of a coal ball when the burnt coal ball moves downwards along a first guide groove, a baffle plate is suitable for providing a stop for the coal ball stored on a second guide rail when the baffle plate is in a vertical state, a driving component is suitable for controlling the baffle plate to swing so that the coal ball stored on the second guide rail moves to a position of a limiting piece and is stopped by the limiting piece, an ignition device is suitable for igniting the coal ball at the position of the limiting piece, and then the driving component can push the burnt coal ball to pass through the limiting piece so that the burnt coal ball moves downwards along the first guide groove under the assistance of dead weight.

Description

Air heater

Technical Field

The invention belongs to the technical field of air heating, and particularly relates to an air heater.

Background

In the related art, the air heating mode can be divided into various modes, the air is heated by coal combustion, when the air is heated by the air heater, the combusted coal is placed on a grate in the air heater, then the air to be heated is introduced into the air heater, and the air heated by the coal is discharged from the air heater so as to meet the use requirement.

However, in the process of burning coal on the grate, coal ash is generated on the surface of the grate, and if the coal ash is attached to the surface of the burnt coal and cannot fall off in time, heat generated by burning the coal cannot be fully released, so that the air heating efficiency is reduced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an air heater, which aims to solve the problem that coal ash is attached to the surface of coal so that heat generated by coal combustion cannot be fully released.

The technical scheme of the invention is as follows:

an air heater comprises a furnace body, a grate, an ignition device, a second guide rail, a baffle plate and a driving assembly, wherein the bottom of the furnace body is provided with an air inlet pipe, the top of the furnace body is provided with an air outlet pipe, and air is suitable for being conveyed into the furnace body from the air inlet pipe to be heated and then is output through the air outlet pipe; the fire grate is arranged in the furnace body, the whole fire grate is spirally and downwardly extended, a first guide groove for the coal balls to roll is formed in the fire grate, an ash falling channel is formed in the first guide groove, a plurality of ash scraping pieces are arranged on the first guide groove at intervals along the extending direction of the first guide groove, the ash scraping pieces are suitable for scraping the coal ash on the surface of the coal balls when the burnt coal balls move downwards along the first guide groove, a limiting piece is arranged at the initial position close to the top end of the fire grate, and the limiting piece is suitable for limiting and stopping the coal balls; the ignition device is arranged on the furnace body and is suitable for igniting the coal balls moving to the limiting part; the second guide rail is fixedly connected with the furnace body, the second guide rail is arranged at the initial position of the top end of the grate, and the coal balls are suitable for being stored on the second guide rail; the baffle is rotatably arranged at the initial position of the top end of the grate, and is suitable for providing a stop for the coal balls stored on the second guide rail when the baffle is in a vertical state; the driving assembly is suitable for controlling the baffle to swing so that the coal balls stored on the second guide rail move to the position of the limiting piece and the coal balls are stopped by the limiting piece, the ignition device is suitable for igniting the coal balls at the position of the limiting piece, and then the driving assembly can push the burnt coal balls to pass the limiting piece so that the burnt coal balls move downwards along the first guide groove in a spiral manner under the assistance of self weight.

By adopting the technical scheme, the invention has the beneficial effects that: the ignited coal ball moves down the in-process along first guide way, and the produced coal ash of coal ball surface combustion can be scraped under the assistance of scraping the ash spare, and then the coal ash can drop to the inside bottom of furnace body through the ash passageway, and the coal ball after striking off the coal ash can release heat more abundant to carry out better heating to the air.

Further, the drive assembly comprises a plurality of drive arms which are synchronously and rotatably arranged in the furnace body, the drive arms are positioned on the inner side of the spiral grate, a plurality of scraping plates are rotatably arranged on one side of each drive arm, which faces the grate, of each drive arm respectively, the coal balls are suitable for spirally downwards moving along the first guide grooves and driving the scraping plates to rotate, the baffle is rotatably connected with the drive arm, which is close to the starting position of the top end of the grate, of each drive arm, the limiting piece is positioned on one side, far away from the baffle, of each scraping plate, and when the drive arm drives the scraping plates to move in the direction far away from the baffle, the baffle can rotate and separate from a stop for the coal balls.

Further, the grate is formed by the cooperation of three support bars that are spiral, one of them the support bar is located the below of two other support bars for three the cross-section of support bar is three-point type and distributes and form approximately the shape of reverse triangle, and then limited out first guide way, and first guide way reduces along the direction that the grate spiral extends downwards gradually, the ash falling passageway is limited by the support bar that is located the below and two other support bars.

Further, the arc-shaped piece is fixedly arranged on the supporting rod located below, the other two supporting rods are fixedly connected with two ends of the arc-shaped piece respectively, the ash scraping piece is arranged on the upper side of the arc-shaped piece, and the ash scraping piece is in an arc shape matched with the arc-shaped piece.

By adopting the technical scheme, the effect is that: the fire grate is formed by the cooperation of three support bars that are spiral form, and the three the cross-section of support bar is three-point type and distributes and form approximately the shape of triangle that falls, has increased the area of contact of burnt coal ball and air through above-mentioned setting to do benefit to the heating of air, the ash falling passageway also is favorable to the whereabouts that the coal ash can be timely simultaneously, and then improves air heating efficiency.

Further, fixedly provided with installed part on the actuating arm, the installed part is the L type, the scraper blade rotates through the elasticity piece that resets and installs on the installed part, after the coal ball moves down along first guide way screw and rotates through the scraper blade, the scraper blade can reset under the effect of elasticity piece that resets, just the scraper blade can be in vertical state under the spacing effect of L type installed part, one side that the scraper blade is relative with first guide way has arc and scrapes the portion of getting, arc scrapes the portion of getting and is suitable for scraping the coal ash on the partial surface of the coal ball of burning.

Further, the driving assembly further comprises a rotating shaft rotatably arranged at the bottom of the furnace body, a plurality of driving arms are annularly arranged at the outer peripheral side of one end of the rotating shaft, which is positioned in the furnace body, the spiral radius of the fire grate is gradually reduced from top to bottom, so that the fire grate is of an inverted cone structure, a coal ash collecting piece is rotatably arranged in the furnace body, the whole coal ash collecting piece is of an inverted cone structure matched with the inverted cone fire grate, the coal ash collecting piece comprises an inner cone barrel and an outer cone barrel, the inner cone barrel is fixedly connected with the outer cone barrel through a connecting rod, an installation cavity for installing the fire grate and a plurality of driving arms is limited between the outer side of the inner cone barrel and the inner side of the outer cone barrel, and the inner cone barrel and the outer cone barrel are coaxially and rotatably installed at the outer peripheral side of the rotating shaft respectively.

Further, the back taper bottom surface of outer cone is the slope state setting, and the outside fixed mounting of outer cone has the ash discharging pipe that is linked together with the inside of outer cone, the inside bottom of ash discharging pipe is unanimous with the inclination of the back taper bottom surface of outer cone, the one end that outer cone was kept away from to the ash discharging pipe is laminated with the inner wall of furnace body and is contacted the outside that the one end was kept away from to the ash discharging pipe still is provided with the sunshade, the sunshade is laminated with the inner wall of furnace body and is contacted.

Further, the first through hole and the second through hole have been seted up to the periphery side of outer cone bottom the transition pipe that is linked together with the second through hole is installed to the inboard of outer cone, the one end that the second through hole was kept away from to the transition pipe is airtight intercommunication with the inboard of interior cone, the one end of intake pipe is to the furnace body internal extension and with the outer conical surface of outer cone laminating contact mutually, and through rotating the coal ash collecting piece can make intake pipe and first through hole or second through hole be linked together.

Further, when the air inlet pipe is communicated with the second through hole, the shielding plate seals the ash outlet, so that air can be conveyed to the inner side of the inner cone barrel through the air inlet pipe, the second through hole and the transition pipe in sequence, and then the air is heated by the burnt coal balls, and coal ash generated by the coal balls in the combustion process can fall on the inner side surface of the outer cone barrel and then slide to the inner bottom end of the outer cone barrel; when the air inlet pipe is communicated with the first through hole, the shielding plate is separated from blocking the ash outlet, air enters the installation cavity through the first through hole, and then under the assistance of the outer conical surface of the inner cone, coal ash can be blown into the ash discharge pipe well by the air, and then the coal ash is blown out of the furnace body through the ash outlet.

Further, a driving piece is installed at the bottom end of the furnace body, a rack is installed at the output end of the driving piece, the lower end of the rotating shaft extends downwards to the bottom of the furnace body and is coaxially provided with a driving gear, the driving gear is meshed with the rack, and the driving piece can drive the rack to reciprocate, so that the rotating shaft can reciprocate within a set angle range.

By adopting the technical scheme, the effect is that: when heating the air, the produced coal ash of coal ball burning can drop at the medial surface of outer cone barrel and then the inside bottom of landing to outer cone barrel, after the air heater used a period, the coal ash accumulation volume of the inside bottom of outer cone barrel reached certain degree, rotate the position that corresponds to intake pipe and first through-hole with the coal ash collecting member through rotating the handle, the shutoff to the ash outlet breaks away from this moment, and the air gets into the installation cavity through first through-hole, then under the assistance of the outer conical surface of inner cone barrel for the coal ash can be fine by blowing to the ash intraductal, and the back blows out the furnace body with the coal ash through the ash outlet.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic diagram of a second perspective structure of the present invention.

Fig. 3 is a schematic view of a third perspective structure of the present invention.

FIG. 4 is a partial cross-sectional view of a furnace body of the present invention.

Fig. 5 is a schematic structural view of the second guide rail.

Fig. 6 is a schematic view of a part of the structure of the grate and the drive assembly.

Fig. 7 is an enlarged partial schematic view of the portion a in fig. 6.

Fig. 8 is a schematic view of a portion of the structure of the drive assembly.

Fig. 9 is a partially enlarged schematic view of the portion B in fig. 8.

Fig. 10 is a schematic perspective view of a second embodiment of the present invention.

Fig. 11 is a partial cross-sectional view of a soot collection member.

FIG. 12 is another partial cross-sectional view of a soot collection member.

Fig. 13 is a schematic perspective view of the soot collecting member, the grate and the second rail.

Fig. 14 is a schematic perspective view of a soot collecting member and a soot discharging tube.

In the figure, 10, a furnace body; 11. an air inlet pipe; 12. an ash outlet; 13. an air outlet pipe; 14. an ignition device; 15. a feed pipe; 20. a grate; 21. a support rod; 211. an arc-shaped member; 22. a dust scraping piece; 23. a limiting piece; 30. a second guide rail; 41. a rotating shaft; 411. a drive gear; 42. a driving arm; 421. a mounting member; 43. a scraper; 431. an arc scraping part; 44. a baffle; 441. a transition piece; 45. a driving member; 51. an inner cone barrel; 52. an outer cone; 521. an ash discharge pipe; 522. conical gear ring; 523. a first through hole; 524. a guide cover; 525. a transition pipe; 53. a shutter; 54. a handle; 541. bevel gears.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1-4, a first embodiment of an air heater comprises a furnace body 10, an air inlet pipe 11 and an ash outlet 12 are arranged at the bottom of the furnace body 10, an air outlet pipe 13 is arranged at the top of the furnace body 10, air is suitable for being conveyed from the air inlet pipe 11 into the furnace body 10 to be heated and then output to equipment requiring hot air through the air outlet pipe 13, a grate 20 is arranged in the furnace body 10, the grate 20 is integrally spirally and downwardly arranged, an ignition device 14 is also arranged on the furnace body 10, coal balls ignited by the ignition device 14 are suitable for rolling downwards along the grate 20 until the coal balls burn out and scatter at the inner bottom end of the furnace body 10 in the form of coal ash, and the coal ash is cleaned out of the furnace body 10 from the ash outlet 12 after a period of time.

As shown in fig. 4-7, the grate 20 has an ash falling channel, the coal ash generated by the combustion of the surface of the coal ball is suitable for falling to the bottom end inside the furnace body 10 through the ash falling channel, furthermore, the ash falling channel also provides a channel for the passage of air, so that the heat generated by the combusted coal ball can be fully contacted with the air, specifically, in this embodiment, the grate 20 is formed by matching three spiral support rods 21, the three support rods 21 are arranged at intervals and limit a first guide groove for the coal ball to roll, one support rod 21 is located below the other two support rods 21, so that the cross sections of the three support rods 21 are distributed in a three-point mode and form an approximately inverted triangle shape, the ash falling channel is limited by the support rods 21 located below and the other two support rods 21, thereby the combustion coal ball can be heated with air better in the moving process of the first guide groove, and the first guide groove can be gradually reduced along the direction of the downward spiral extension of the grate 20, the three support rods 21 need to be fixed by a plurality of arc-shaped pieces 211, and the arc-shaped pieces are fixed between the arc-shaped pieces 21 and the arc-shaped pieces are fixed.

As shown in fig. 4 to 7, 11 and 13, a second guide rail 30 is fixedly installed at the initial position of the top end of the grate 20, the second guide rail 30 is integrally spirally downwardly arranged and communicated with the grate 20, a second guide groove consistent with the spiral extending direction of the second guide rail 30 is formed in the second guide rail 30, a feed pipe 15 is also installed on the furnace body 10, and one end of the second guide rail 30, which is far away from the grate 20, is communicated with the feed pipe 15, so that coal balls are conveniently added onto the second guide rail 30 from the feed pipe 15 and can be stored in a certain amount on the second guide rail 30, and then the coal balls positioned on the second guide rail 30 roll downwards along the grate 20 after being ignited until the coal balls burn out and are scattered at the inner bottom end of the furnace body 10 in the form of coal ash.

It should be noted that, as shown in fig. 4, the second guide rail 30 is fixedly connected to the inner wall of the furnace body 10 through a plurality of supporting members to maintain the stability of the entirety of the grate 20 and the second guide rail 30.

As shown in fig. 4 and 6 to 9, a driving assembly is rotatably mounted in the furnace body 10, the driving assembly comprises a rotating shaft 41 rotatably mounted at the bottom of the furnace body 10, a plurality of driving arms 42 are annularly arranged at the outer peripheral side of one end of the rotating shaft 41 positioned in the furnace body 10, the driving arms 42 are fixedly connected with the rotating shaft 41, the driving arms 42 are positioned at the spiral inner side of the spiral grate 20, a plurality of scraping plates 43 are rotatably mounted at one side of each driving arm 42 facing the grate 20, the scraping plates 43 are arranged at intervals along the length extending direction of the driving arms 42, and the scraping plates 43 on each driving arm 42 are matched with the first guide grooves of the grate 20.

Specifically, as shown in fig. 6-9, a plurality of mounting members 421 are fixedly disposed on the driving arm 42, the plurality of mounting members 421 are in one-to-one correspondence with the plurality of scraping plates 43, in this embodiment, the mounting members 421 are in an L shape, the scraping plates 43 are rotatably mounted on the mounting members 421 through elastic reset members, and an arc scraping portion 431 is disposed on a side of the scraping plates 43 opposite to the first guiding groove.

As shown in fig. 4 and 6 to 9, a baffle 44 is rotatably installed at a top end start position of the grate 20, the baffle 44 is adapted to provide a stop for the coal balls stored on the second guide rail 30 when the baffle 44 is in a vertical state, a transition piece 441 is rotatably installed at a lower end of the baffle 44, one end of the transition piece 441 away from the baffle 44 is rotatably installed on a mounting piece 421 closest to the baffle 44 along an extending direction of the grate 20, so that when the driving arm 42 drives the mounting piece 421 to rotate a certain angle along the extending direction of the grate 20 in a direction away from the baffle 44, the baffle 44 can swing from the vertical state to a direction close to the mounting piece 421 with the aid of the transition piece 441, and then the baffle 44 can be separated from the stop for the coal balls stored on the second guide rail 30 and close to the baffle 44, and then the driving arm 42 drives the mounting piece 421 to move a distance to a direction close to the baffle 44 after passing through the baffle 44, so that the baffle 44 swings to the vertical state, and then the rest of the coal balls can stop, and the driving arm 42 can be released from the first guide rail 20 to the second reciprocating movement range of the coal balls when the driving arm is in a set range of rotation.

In addition, referring to fig. 4 and 6 to 9, a plurality of ash scraping members 22 are arranged on the first guide groove at intervals along the extending direction of the first guide groove, the ash scraping members 22 are arranged on the upper side of the arc-shaped member 211, the ash scraping members 22 are arc-shaped, the ash scraping members 22 are suitable for scraping off the coal ash on the surface of the burnt coal balls, it is noted that a limiting member 23 is arranged at the starting position near the top end of the grate 20, the limiting member 23 is positioned on one side of the scraping plate 43 away from the baffle plate 44, so that when the coal balls moving between the scraping plate 43 and the baffle plate 44 continue to move downwards along the first guide groove, the scraping plate 43 can be used, then the limiting member 23 carries out a short limiting stop, then the ignition device 14 is started to ignite the coal balls, then the driving arm 42 is driven to drive the mounting member 421 to move a certain distance away from the baffle plate 44, so that the scraping plate 43 pushes the ignited coal balls to cross the limiting member 23, then the coal balls spirally move downwards along the first guide groove with the assistance of the self weight of the coal balls, and then the next coal balls are released again by the baffle plate 44 through rotation 42, and the ignition driving arm is continuously carried out to the ignition balls until the ignition balls are continuously conveyed into the first guide groove.

It should be noted that, during the process of moving the ignited coal ball downward along the first guiding groove, the ignited coal ball will continuously heat the air flowing into the furnace body 10, and as the coal ball burns, the coal ball surface will continuously generate coal ash, and as the coal ball will continuously contact with the corresponding ash scraping member 22 and the scraping plate 43 during moving downward along the first guiding groove, the coal ash on the coal ball surface will be intermittently cleaned, so that the heat of the ignited coal ball can be fully utilized, and further the air is heated, the heated air will be output from the air outlet pipe 13 to the equipment requiring hot air, and when the burnt coal ball moves downward along the first guiding groove to the lowest point, the coal ball burns, and the generated coal ash will drop at the bottom end of the furnace body 10, after the coal ball is used, the coal ash is cleaned out of the furnace body 10 from the outlet 12, and it should be noted that, when the air is heated, the outlet 12 is kept in a state of being closed to prevent the heat loss for a period of time.

It will be appreciated that the grate 20 may be in a state of being integrally spirally downwardly disposed, and the spiral radius is unchanged, in this embodiment, it is preferable that the spiral radius of the grate 20 is gradually reduced from top to bottom, so that the grate 20 is in an inverted cone structure, and the inverted cone structure is beneficial to that the coal ash directly falls from the grate 20 to the bottom end of the interior of the furnace body 10, so that the coal ash is prevented from being accumulated on the grate 20.

In this embodiment, referring to fig. 3, 4 and 6, a driving member 45 for driving the rotating shaft 41 to rotate within a certain angle range is installed at the bottom end of the furnace body 10, specifically, the driving member 45 may be a telescopic cylinder, a rack is installed at the telescopic end of the telescopic cylinder, the lower end of the rotating shaft 41 extends downward to the bottom of the furnace body 10 and is coaxially installed with a driving gear 411, and the driving gear 411 and the rack can be meshed, so that the rotating shaft 41 can be driven to rotate within a certain angle range through the operation of the telescopic cylinder, and then the driving arms 42 can be driven to simultaneously reciprocate within a certain angle range.

In order to facilitate the discharge of the coal ash after the coal ash falls to the bottom end of the furnace body 10 and reduce the spread of the coal ash around the furnace body 10, the invention also provides a second embodiment.

As shown in fig. 11 to 14, a soot collecting member is rotatably installed in the furnace body 10, the soot collecting member is integrally formed in an inverted cone structure adapted to the inverted cone-shaped grate 20, the soot collecting member includes an inner cone barrel 51 and an outer cone barrel 52, the inner cone barrel 51 is fixedly connected with the outer cone barrel 52 through a connecting rod, an installation cavity for installing the grate 20 and the plurality of driving arms 42 is limited between the outer side of the inner cone barrel 51 and the inner side of the outer cone barrel 52, and the installation position of the connecting rod does not affect the reciprocating rotation of the plurality of driving arms 42 within a certain angle range.

It should be noted that the inner cone 51 and the outer cone 52 are respectively in an inverted cone structure, the whole inner cone 51 and the whole outer cone 52 are located below the second guide rail 30, the inner cone 51 and the outer cone 52 are respectively coaxially installed on the outer periphery side of the rotating shaft 41 in a rotating way, the inverted cone bottom surface of the outer cone 52 is arranged in an inclined state, an ash discharging pipe 521 communicated with the inside of the outer cone 52 is fixedly installed on the outer side of the outer cone 52, the inclined angle of the inner bottom end of the ash discharging pipe 521 is consistent with that of the inverted cone bottom surface of the outer cone 52, so that the coal ash located on the inverted cone bottom surface of the outer cone 52 can smoothly enter the ash discharging pipe 521, in addition, one end of the ash discharging pipe 521 far away from the outer cone 52 is in contact with the inner wall of the furnace body 10 in a fitting way, so that the relative sealing between the ash discharging pipe 521 and the inner wall of the furnace body 10 is realized, a shielding plate 53 is further arranged on the outer side of one end of the ash discharging pipe 521 far away from the outer cone 52, and the shielding plate 53 is in contact with the inner wall of the furnace body 10 in a fitting way.

When the furnace body 10 is used for heating air, the whole coal ash collecting piece can be rotated for a certain angle, so that the shielding plate 53 seals the ash outlet 12, and at the moment, one end of the ash discharging pipe 521, which is far away from the outer cone 52, is in contact with the inner wall of the furnace body 10; when ash discharge is required, the coal ash collecting member can be integrally rotated by a certain angle so that the shielding plate 53 is separated from the blocking of the ash outlet 12, the ash discharge pipe 521 corresponds to the ash outlet 12, and then ash discharge can be performed.

As shown in fig. 10, 12 and 13, a handle 54 is rotatably mounted on the outer wall of the furnace body 10, one end of the handle 54 extends into the furnace body 10 and is provided with a bevel gear 541, and the outer edge of the top end of the outer cone 52 is provided with a bevel gear ring 522 meshed with the bevel gear 541, so that the rotation adjustment of the soot collecting member can be realized by rotating the handle 54.

Referring to fig. 10-14, a first through hole 523 and a second through hole are formed on the outer peripheral side of the bottom of the outer cone 52, a guide cover 524 communicated with the first through hole 523 is arranged on the inner side of the outer cone 52, the guide cover 524 is inclined towards the bottom of the outer cone 52, a gap is formed between one end of the guide cover 524 far away from the inner side of the outer cone 52 and the outer side of the inner cone 51, so that air enters the installation cavity from the first through hole 523, then coal ash can be blown into the ash discharge pipe 521 well with the aid of the guide cover 524 and the outer conical surface of the inner cone 51, a transition pipe 525 communicated with the second through hole is further arranged on the inner side of the outer cone 52, and one end of the transition pipe 525 far away from the second through hole is communicated with the inner side of the inner cone 51 in a sealing manner.

When the air heater is used for a period of time, the soot accumulation amount at the inner bottom end of the outer cone 52 reaches a certain degree, the soot collector can be rotated to the position of the air inlet pipe 11 corresponding to the first through hole 523 through the handle 54, the shutter 53 is used for blocking the soot outlet 12, air can be sequentially conveyed to the inner side of the inner cone 51 through the air inlet pipe 11, the second through hole and the transition pipe 525, and then heated by the burnt coal balls, soot generated in the combustion process of the coal balls can fall on the inner side surface of the outer cone 52 and then slide to the inner bottom end of the outer cone 52, the soot collector can be rotated to the position of the air inlet pipe 11 corresponding to the first through hole 523 through the handle 54, and the shutter 53 is separated from blocking the soot outlet 12 at the moment, and the air enters the installation cavity through the first through hole 523, and then can be blown into the soot discharge pipe 521 well under the assistance of the guide cover 524 and the outer conical surface of the inner cone 51, and then the soot is blown out of the soot outlet 10 through the soot outlet 12.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. An air heater is provided, which comprises a heater,

characterized by comprising the following steps:

the device comprises a furnace body (10), wherein an air inlet pipe (11) is arranged at the bottom of the furnace body (10), an air outlet pipe (13) is arranged at the top of the furnace body (10), and air is suitable for being conveyed into the furnace body (10) from the air inlet pipe (11) to be heated and then is output through the air outlet pipe (13);

the fire grate (20), fire grate (20) are installed in furnace body (10), fire grate (20) whole spiral downwardly extending sets up, have the first guide way that supplies the coal ball to roll on fire grate (20), first guide way is last to have the ash falling passageway first guide way along the extending direction interval arrangement of first guide way have a plurality of ash scraping pieces (22), ash scraping pieces (22) are suitable for scraping the coal ash of coal ball surface when moving down along first guide way to the coal ball of burning, are provided with locating part (23) in the top initial position department that is close to fire grate (20), locating part (23) are suitable for carrying out limit stop to the coal ball;

the ignition device (14) is arranged on the furnace body (10), and the ignition device (14) is suitable for igniting the coal balls moving to the limiting piece (23);

the second guide rail (30), the second guide rail (30) is fixedly connected with the furnace body (10), the second guide rail (30) is arranged at the initial position of the top end of the grate (20), and the coal balls are suitable for being stored on the second guide rail (30);

a baffle (44), said baffle (44) being rotatably mounted at a top end start position of the grate (20), said baffle (44) being adapted to provide a stop for the coal balls stored on the second rail (30) when in a vertical state;

a drive assembly adapted to control the swinging of the baffle (44) to move the coal balls stored on the second guide rail (30) to the limit piece (23) and to cause the coal balls to be stopped by the limit piece (23), the ignition device (14) being adapted to ignite the coal balls at the limit piece (23), the drive assembly being then capable of pushing the burned coal balls over the limit piece (23) so that the burned coal balls are moved helically downward along the first guide groove with the aid of self weight;

the driving assembly comprises a plurality of driving arms (42) which are synchronously and rotatably arranged in the furnace body (10), the driving arms (42) are positioned on the inner side of a spiral of the spiral grate (20), a plurality of scraping plates (43) are rotatably arranged on one side of each driving arm (42) facing the grate (20), coal balls are suitable for spirally moving downwards along a first guide groove and driving the scraping plates (43) to rotate, the baffle plates (44) are rotatably connected with the driving arms (42) which are close to the top starting positions of the grate (20), the limiting pieces (23) are positioned on one side of the scraping plates (43) away from the baffle plates (44), and when the driving arms (42) drive the scraping plates (43) to move in the direction away from the baffle plates (44), the baffle plates (44) can rotate and be separated from a stop for the coal balls;

the fire grate (20) is formed by matching three spiral supporting rods (21), one supporting rod (21) is positioned below the other two supporting rods (21), so that the cross sections of the three supporting rods (21) are distributed in a three-point mode and form an approximately inverted triangle shape, the first guide groove is further limited, the first guide groove is gradually reduced along the downward spiral extending direction of the fire grate (20), and the ash falling channel is limited between the supporting rod (21) positioned below and the other two supporting rods (21);

an arc-shaped piece (211) is fixedly arranged on the support rod (21) positioned below, the other two support rods (21) are fixedly connected with two ends of the arc-shaped piece (211) respectively, the ash scraping piece (22) is arranged on the upper side of the arc-shaped piece (211), and the ash scraping piece (22) is in an arc shape matched with the arc-shaped piece (211);

the device is characterized in that an installation piece (421) is fixedly arranged on the driving arm (42), the installation piece (421) is L-shaped, the scraping plate (43) is rotatably installed on the installation piece (421) through an elastic reset piece, when a coal ball moves downwards along a first guide groove in a spiral mode and rotates through the scraping plate (43), the scraping plate (43) can reset under the action of the elastic reset piece, the scraping plate (43) can be in a vertical state under the limiting effect of the L-shaped installation piece (421), an arc scraping part (431) is arranged on one side, opposite to the first guide groove, of the scraping plate (43), and the arc scraping part (431) is suitable for scraping coal ash on a part of the surface of the combusted coal ball;

a transition piece (441) is rotatably mounted at the lower end of the baffle (44), and one end of the transition piece (441) away from the baffle (44) is rotatably mounted on a mounting piece (421) closest to the baffle (44) along the extending direction of the grate (20);

the spiral radius of the grate (20) is gradually reduced from top to bottom, so that the grate (20) has an inverted cone structure.

2. An air heater according to claim 1, wherein: the driving assembly further comprises a rotating shaft (41) rotatably arranged at the bottom of the furnace body (10), a plurality of driving arms (42) are annularly arranged on the outer peripheral side of one end, located in the furnace body (10), of the rotating shaft (41), a coal ash collecting piece is rotatably arranged in the furnace body (10), the coal ash collecting piece is integrally of an inverted cone structure matched with an inverted cone-shaped grate (20), the coal ash collecting piece comprises an inner cone barrel (51) and an outer cone barrel (52), the inner cone barrel (51) is fixedly connected with the outer cone barrel (52) through a connecting rod, and a mounting cavity for the installation of the grate (20) and the driving arms (42) is limited between the outer side of the inner cone barrel (51) and the inner side of the outer cone barrel (52), and the inner cone barrel (51) and the outer cone barrel (52) are coaxially and rotatably mounted on the outer peripheral side of the rotating shaft (41) respectively.

3. An air heater according to claim 2, wherein: the ash discharging pipe (521) communicated with the inside of the outer cone (52) is fixedly arranged on the outer side of the outer cone (52), the inner bottom end of the ash discharging pipe (521) is consistent with the inclined angle of the inverted cone bottom surface of the outer cone (52), one end of the ash discharging pipe (521), far away from the outer cone (52), is in contact with the inner wall of the furnace body (10), and a shielding plate (53) is arranged on the outer side of one end of the ash discharging pipe (521), far away from the outer cone (52), and the shielding plate (53) is in contact with the inner wall of the furnace body (10).

4. An air heater according to claim 3, wherein: the utility model discloses a coal ash collecting piece, including outer cone (52) and inner cone (51), outer cone (52) bottom's periphery side has been seted up first through-hole (523) and second through-hole the inboard of outer cone (52) is installed transition pipe (525) that are linked together with the second through-hole, the one end that second through-hole was kept away from to transition pipe (525) is airtight intercommunication with the inboard of inner cone (51), the one end of intake pipe (11) extends in furnace body (10) and contacts with the outer conical surface of outer cone (52) laminating, and through rotating intake pipe (11) are linked together with first through-hole (523) or second through-hole.

5. An air heater according to claim 4, wherein: the bottom of the furnace body (10) is also provided with an ash outlet (12), when the air inlet pipe (11) is communicated with the second through hole, the ash outlet (12) is blocked by the shielding plate (53), so that air can be conveyed to the inner side of the inner cone (51) through the air inlet pipe (11), the second through hole and the transition pipe (525) in sequence, and then the air is heated by the burnt coal balls, and the coal ash generated by the coal balls in the combustion process can fall on the inner side surface of the outer cone (52) and then slide to the inner bottom end of the outer cone (52); when the air inlet pipe (11) is communicated with the first through hole (523), the shielding plate (53) is separated from the blocking of the ash outlet (12), air enters the installation cavity through the first through hole (523), and then under the assistance of the outer conical surface of the inner conical barrel (51), coal ash can be blown into the ash discharge pipe (521) by the air well, and then the coal ash is blown out of the furnace body (10) through the ash outlet (12).

6. An air heater according to any one of claims 2-5, wherein: the bottom of furnace body (10) is installed driving piece (45), installs the rack at the output of driving piece (45), the lower extreme of pivot (41) downwardly extending to the bottom of furnace body (10) and coaxial arrangement have drive gear (411), drive gear (411) mesh with the rack, driving piece (45) can drive rack reciprocating motion, so that pivot (41) can be in the reciprocal rotation of angle scope of settlement.