CN112617629A

CN112617629A - Particle combustion furnace

Info

Publication number: CN112617629A
Application number: CN202110016674.0A
Authority: CN
Inventors: 郑颖
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-04-09
Anticipated expiration: 2041-01-07
Also published as: CN112617629B

Abstract

The invention discloses a particle combustion furnace, which belongs to the field of combustion equipment and solves the problems of inconvenient ash removal or poor ash falling effect of a combustor in the prior art, and the technical scheme for solving the problems is mainly that a through hole for air inlet and ash falling is formed in the bottom surface of the combustor, a grid structure is arranged above the through hole and comprises a first layer of supporting body and a second layer of supporting body which are fixed on the combustor, the first layer of supporting body is lower than the adjacent second layer of supporting body, the second layer of supporting body is distributed in a staggered mode in the vertical direction relative to the first layer of supporting body, a first channel is arranged between the first layer of supporting body and the second layer of supporting body, the width of the first channel is smaller than the diameter D of a particle fuel, the distance L2 between the two adjacent second layer of supporting bodies is larger than D and smaller than 2D, a feed inlet is positioned above the grid structure, the height difference is H, the H is not smaller than 3D. The automatic ash falling device is mainly used for automatically falling ash, has good ash falling effect and is convenient for users to clean ash.

Description

Particle combustion furnace

Technical Field

The invention relates to combustion equipment, in particular to a particle combustion furnace.

Background

The existing particle combustion furnace, such as a barbecue oven, adopts a burner which is basically of a bottom-closed structure, and after each use, ash generated after combustion of particle fuel is cleaned through a dust collector, so that the particle combustion furnace is very inconvenient and poor in use experience of users. If like the heating stove again, generally can set up the one deck grate and be used for falling the ash, but the pellet fuel of living beings generally is the cylindric structure of extruding out, the diameter is at 4 ~ 6mm, length is at 1 ~ 6cm, and if there is not exogenic action in the ashes that pellet fuel burning produced, can keep cylindricly, consequently, be difficult to directly drop, it is relatively poor to lead to ash efficiency and effect to fall, burn after the longer time, still need other parts to assist, break up the deashing with ashes, not only the structure is more complicated, and manufacturing cost is higher, and it participates in to need the user, it is inconvenient to use.

Disclosure of Invention

The invention aims to provide a particle combustion furnace which can automatically drop ash, has good ash dropping effect and is convenient for users to clean ash.

In order to achieve the purpose, the invention adopts the following technical scheme: a particle combustion furnace comprises a furnace body, a combustor is arranged in the furnace body, the top end of the combustor is open, a feed inlet is formed in the side wall of the combustor, a fuel hopper is arranged on the outer side of the furnace body, a feed channel is arranged between the fuel hopper and the feed inlet, a through hole for air inlet and ash falling is formed in the bottom surface of the combustor, a grid structure for supporting particle fuel is arranged above the through hole and comprises a first layer of support bodies and a second layer of support bodies, the first layer of support bodies are fixed on the combustor, the first layer of support bodies are lower than the adjacent second layer of support bodies, the second layer of support bodies are distributed in a staggered mode in the vertical direction relative to the first layer of support bodies, a first channel for ash falling and air inlet is arranged between the first layer of support bodies and the second layer of support bodies, the width of the first channel is smaller than the diameter D of the particle fuel, the distance L2 between every two, h is not less than 3D, and pellet fuel whereabouts shakes the particle fuel ashes and scatters, and the through hole air inlet blows the particle fuel ashes between adjacent first layer supporter and the second floor supporter and scatters, and the bottom of furnace body is located the below of combustor and is equipped with and connects the ash tray, connects the ash tray to the through hole.

Furthermore, the bottom of the furnace body is provided with an ash receiving cavity for placing an ash receiving disc, and the ash receiving disc can move in or out of the ash receiving cavity relative to the furnace body.

Further, connect the ash intracavity to be equipped with the slide rail, connect the ash dish to connect in the slide rail, the lateral wall that connects the ash chamber is equipped with the opening that supplies to connect the ash dish to pass, connects the ash dish to move into and connects the ash chamber and close the opening.

Furthermore, the furnace body is provided with an air supply channel for supplying air from the outside of the furnace body, an air guide cover is arranged on the periphery of the combustor, an air guide channel communicated with the air supply channel is formed between the air guide cover and the combustor, an annular windshield is arranged on the air guide cover and below the combustor, an air inlet gap is formed between the annular windshield and the bottom end of the combustor, a through hole is formed in the inner ring of the annular windshield, a rebound windshield is arranged below the through hole, and the rebound windshield faces the grid structure through the through hole.

Furthermore, the bottom end of the wind scooper is turned inwards to form an annular windshield.

Furthermore, an upward convex boss is arranged in the ash receiving disc, a rebound windshield is formed on the top surface of the boss, and the caliber of the rebound windshield is not less than that of the through hole; or the inner bottom surface of the ash receiving disc forms a rebound windshield, and the caliber of the rebound windshield is not less than that of the through hole.

Furthermore, the extending direction of the first layer of support bodies and the second layer of support bodies is perpendicular to the feeding direction of the feed inlet, the distance L1 between two adjacent first layer of support bodies is gradually increased from the side part where the feed inlet is positioned to the opposite side part, and the distance L2 between two adjacent second layer of support bodies is gradually increased from the side part where the feed inlet is positioned to the opposite side part; and/or the first layer of support bodies are distributed from the side part where the feed inlet is positioned to the opposite side part in an inclined and downward way, and the second layer of support bodies are distributed from the side part where the feed inlet is positioned to the opposite side part in an inclined and downward way.

Further, the bottom end of the combustor is open to form a through hole.

Further, the bottom end face of the burner is inclined from the side wall where the feed port is located to the opposite side wall from high to low.

Furthermore, an auxiliary support body for maintaining the primer is arranged below the first layer of support body, the auxiliary support body is higher than the through hole, and the auxiliary support body is positioned on one side below the feed inlet and is not more than 1/2 of the area covered by the grid structure.

After the technical scheme is adopted, the invention has the following advantages:

the grid structure is designed to support the granular fuel, the width of the first channel is smaller than the diameter D of the granular fuel, the distance L2 between two adjacent second-layer supporting bodies is larger than D and smaller than 2D, the granular fuel can enter the space between the two adjacent second-layer supporting bodies to avoid directly falling from the first channel, the granular fuel which firstly enters the space between the two adjacent second-layer supporting bodies can make the granular fuel overhead, and the two adjacent second-layer supporting bodies are difficult to enter the two granular fuels side by side, so that the contact area between the granular fuel and air can be increased, the combustion efficiency is effectively increased, and 25% of fuel can be saved through experimental calculation; the granular fuel is combusted from a lower part to a higher part, the granular fuel between two adjacent second-layer supporting bodies is firstly combusted into ash, in order to improve the ash falling efficiency, firstly, the feed inlet is designed to be positioned above the grid structure, the height difference H is not less than 3D, the granular fuel is influenced by gravity and falls downwards when being conveyed into the combustion cavity, so that the granular fuel which is being combusted is vibrated, and because the two adjacent second-layer supporting bodies cannot enter the two granular fuels side by side, the granular fuel which is positioned between the two adjacent second-layer supporting bodies is necessarily contacted with and presses the granular fuel below, the acting force generated when the subsequent granular fuel is conveyed into the combustion cavity is finally transmitted to the granular fuel ash between the two adjacent second-layer supporting bodies, so that the granular fuel ash is shaken and dispersed, and the second through hole is used for large-area air inlet, the ash generated after the combustion of the granular fuel is prevented from being accumulated at the bottom of the combustor, the airflow flows upwards through the first channel and blows and scatters the granular fuel ash between the adjacent first-layer support body and the second-layer support body, and once the ash is scattered, the granular fuel above the ash automatically falls down, so that the ash has no space to maintain the current position and falls through the first channel; considering that the ash falls downwards and the air flows upwards, the movement directions of the second layer of supporting bodies and the first layer of supporting bodies are opposite, in order to avoid mutual influence, the second layer of supporting bodies are designed to be staggered and distributed in the vertical direction relative to the first layer of supporting bodies, namely the second layer of supporting bodies and the first layer of supporting bodies cannot be completely overlapped in the vertical direction, the first channels formed in the way are inclined, air flows passing through two adjacent first channels can be in opposite impact with each other to blow and disperse the ash, the upper granular fuel blocks are arranged, so that the air flow cannot provide lifting force to enable the ash to overcome gravity and not fall, the fuel granules fall and occupy the original space of the ash in a matching way, the ash can fall continuously, the circulation is carried out, automatic and efficient ash falling in the granular combustor is realized, the ash falling effect is very good, and the efficient ash falling is realized through the matching of feeding and air inlet, and other parts are not needed for assisting ash removal, not only the production cost is low, but also the user only needs to pour the accumulated dust of the dust collecting plate regularly and timely, and the use experience of the user can be greatly improved.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;

FIG. 2 is an enlarged view taken at I in FIG. 1;

FIG. 3 is an enlarged view taken at II in FIG. 2;

FIG. 4 is a schematic illustration of particulate fuel deposited on a grid structure in accordance with one embodiment of the present invention;

FIG. 5 is a schematic view of an ash receiving tray and an ash receiving chamber according to an embodiment of the present invention;

FIG. 6 is a bottom view of a burner in accordance with one embodiment of the present invention;

FIG. 7 is a diagram illustrating a grid structure according to a second embodiment of the present invention;

FIG. 8 is a sectional view of a burner according to a third embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a fourth embodiment of the present invention;

FIG. 10 is an enlarged view at III of FIG. 9;

FIG. 11 is a schematic view of a burner according to a fourth embodiment of the present invention;

FIG. 12 is a bottom view of a burner according to a fourth embodiment of the present invention;

fig. 13 is a schematic view of an ash receiving tray according to a fourth embodiment of the present invention.

Detailed Description

In brief, the pellet fuel as referred to in the present invention means cylindrical pellets obtained by extrusion molding of biomass raw material such as woody plant chips, and the pellet fuel to be applied to a pellet burner having a fixed size range has a substantially fixed diameter.

The first embodiment is as follows:

the invention provides a particle combustion furnace, as shown in fig. 1 to 6, comprising a furnace body 1, a burner 2 is arranged in the furnace body 1, the top end of the burner 2 is open, a feed port 202 is arranged on the side wall of the burner 2, a fuel hopper 5 is arranged on the outer side of the furnace body 1, a feed channel 501 is arranged between the fuel hopper 5 and the feed port 202, a through port for air inlet and ash falling is arranged on the bottom surface of the burner, a grid structure for supporting the particle fuel 9 is arranged above the through port, the grid structure comprises a first layer support body 21 and a second layer support body 22 which are fixed on the burner 2, the first layer support body 21 is lower than the adjacent second layer support body 22, the second layer support body 22 is staggered and distributed in the vertical direction relative to the first layer support body 21, a first channel 201 for ash falling and air inlet is arranged between the first layer support body 21 and the second layer support body 22, the width W1 of the first channel is, spacing L2 between two adjacent second floor supporters 22 is greater than D and is less than 2D, and the feed inlet is located grid structure top and difference in height is H, and H is not less than 3D, and the pellet fuel ash shakes the scattering with the pellet fuel whereabouts, and the pellet fuel ash between adjacent first floor supporter and the second floor supporter is blown to the through hole air inlet and scatters, and the bottom of furnace body 1 is located the below of combustor 2 and is equipped with and connects ash tray 3, connects ash tray face to the through hole.

The bottom end of the combustor 2 is designed into an open structure, so that ash generated after the combustion of the granular fuel 9 is firstly prevented from being accumulated at the bottom of the combustor 2, and the grid structure is designed to support the granular fuel 9, the width of the first channel 201 is smaller than the diameter D of the granular fuel 9, and since the distance L2 between two adjacent second-layer supporting bodies 22 is larger than D and smaller than 2D, the granular fuel 9 will enter between two adjacent second-layer supporting bodies 22, and will not fall directly from the first channel 201, and the granular fuel 9 firstly entering between two adjacent second-layer supporting bodies 22 will inevitably make the granular fuel 9 overhead, and two adjacent second-layer supporting bodies 22 will not enter two granular fuels 9 side by side, therefore, the contact area of the granular fuel 9 and the air is increased, the combustion efficiency is effectively improved, and 25% of fuel can be saved through experimental measurement and calculation; the granular fuel 9 is combusted from a lower part to a higher part, and the granular fuel 9 between two adjacent second-layer supporting bodies 22 is burnt into ash firstly, so that in order to improve the ash falling efficiency, firstly, a feed inlet is arranged on the side wall of the combustor, the granular fuel can roll down under the influence of gravity when being conveyed into the combustion chamber, so that the granular fuel below the feed inlet can vibrate, and secondly, because two adjacent second-layer supporting bodies cannot enter two granular fuels side by side, the acting force generated when the granular fuel is conveyed into the combustion chamber can be necessarily transferred to the granular fuel ash between the two adjacent second-layer supporting bodies, the ash generated after the granular fuel is combusted can be vibrated and dispersed, secondly, the first channel 201 is simultaneously used for air inlet, and the air flows upwards to pass through the first-layer supporting body 21 and the second-layer supporting body 22, so that the ash generated after the granular fuel 9 is combusted can be blown and dispersed, once the ash is dispersed, the above particulate fuel 9 falls down, causing the ash to fall from the first passage 201 without space to maintain the current position; considering that the ash falls downwards and the air flows upwards, the movement directions of the second layer of support bodies 22 and the first layer of support bodies 21 are opposite, in order to avoid mutual influence, the second layer of support bodies 22 are designed to be staggered in the vertical direction relative to the first layer of support bodies 21, namely the second layer of support bodies 22 and the first layer of support bodies 21 are not completely overlapped in the vertical direction, the first channels 201 formed in this way are inclined, the air passing through the two opposite first channels 201 can collide with each other, the ash can be blown out, the blocking of the particle fuel 9 above is avoided, so that the air is not enough to provide lifting force to ensure that the ash can overcome gravity and cannot fall, the fuel particles above fall and occupy the original space of the ash, the ash can be continuously fallen into the ash receiving disc 3, the circulation is realized, the automatic and efficient ash falling in the combustor 2 is realized, the ash falling effect is very good, and other parts are not needed for assisting in ash removal, not only the production cost is low, but also the user only needs to pour the accumulated dust of the dust collecting plate 3 regularly and timely, and the use experience of the user can be greatly improved.

The extension directions of the first layer of supporting body and the second layer of supporting body are basically consistent, certain inclination can be realized between the first layer of supporting body and the second layer of supporting body, the size requirements are met, the granular fuel entering the combustion chamber at first can fall onto the first layer of supporting body, and the ash falling effect is ensured.

In order to prevent ash from randomly flying to the outside of the furnace body 1, an ash receiving cavity 101 for placing the ash receiving tray 3 can be arranged at the bottom of the furnace body 1, and the ash receiving tray 3 can move into or out of the ash receiving cavity 101 relative to the furnace body 1. For convenience of operation of a user, the ash receiving disc 3 can be taken out or installed, a sliding rail 11 can be arranged in the ash receiving cavity 101, the ash receiving disc 3 is connected to the sliding rail 11, an opening 102 for the ash receiving disc 3 to penetrate through is formed in the side wall of the ash receiving cavity 101, the ash receiving disc 3 is moved into the ash receiving cavity 101 to close the opening 102, and ash can be prevented from flying out through the opening 102.

Compared with the prior art in which air is directly fed into the combustor 2 from the side, the embodiment adopts a mode of feeding air from the bottom of the combustor 2, specifically, an air guide cover 4 may be arranged on the periphery of the combustor 2, an air guide channel 104 communicated with the air feed channel 103 is formed between the air guide cover 4 and the combustor 2, an annular windshield 41 is arranged below the combustor 2 on the air guide cover 4, an air inlet gap 105 is arranged between the annular windshield 41 and the bottom end of the combustor 2, an inner ring of the annular windshield 41 forms a through hole 411, a rebound windshield 31 is arranged below the through hole 411, and the rebound windshield 31 faces the through hole through the through hole 411. The air in the air guide channel 104 flows downwards, changes the flow direction when meeting the annular windshield 41, changes the flow direction into the flow from outside to inside, and after passing through the narrow air inlet gap 105, a part of the air is introduced upward into the burner 2, a part of the air is introduced downward through the penetration holes 411, and after encountering the rebound wind shield 31, the air is divided into a part of air flowing to the periphery of the ash receiving disc 3 and a part of air flowing upwards in a rebound manner, the part of air flowing to the periphery of the ash receiving disc 3 can blow ash on the rebound wind shield 31 to the periphery of the ash receiving disc 3, the part of air flowing upwards in the rebound manner and the aforementioned air directly entering the combustor 2 upwards form an air flowing effect of first and second layers, as shown by the arrows in fig. 3, not only the combustion supporting effect is good, but also the ash of the particulate fuel 9 can be blown out better.

In this embodiment, for convenience of processing and assembling, the bottom end of the wind scooper 4 may be turned inwards to form the annular windshield 41. In addition, a boss 32 protruding upward may be provided in the dust collecting tray 3, a rebound damper 31 may be formed on the top surface of the boss 32, and the diameter of the rebound damper 31 is not smaller than the diameter of the through hole 411. It can be understood that the rebound dampers 31 can be fixed on the furnace body 1, the wind scooper 4 or the burner 2. In order to avoid the ash flying in the furnace body 1, the bottom end of the wind scooper 4 can be inserted into the ash receiving cavity 101, and the outer wall of the wind scooper 4 is connected with the furnace body 1 in a sealing manner, so that the ash cannot reversely pass through the through hole 411 from the ash receiving cavity 101 under the condition of keeping air supply.

In order to make the distribution of the particulate fuel 9 on the grid structure more uniform, the extending direction of the first layer support 21 and the second layer support 22 may be perpendicular to the feeding direction of the feeding port 202 (refer to the direction indicated by the arrow in fig. 2), specifically, the extending direction is perpendicular to the horizontal plane projection of the feeding direction, for example, as shown in fig. 6, and the distance L1 between two adjacent first layer supports 21 is gradually increased from the side where the feeding port 202 is located to the opposite side, and the distance L2 between two adjacent second layer supports 22 is gradually increased from the side where the feeding port 202 is located to the opposite side, that is, gradually increased from the left to the right in fig. 3. The position that is far away from feed inlet 202 is difficult to pile up like this, can hold more particulate fuel 9, lets the particulate fuel 9 of follow-up entering can be to the position motion of keeping away from feed inlet 202 to let particulate fuel 9 distribute more evenly in combustor 2, be favorable to improving combustion efficiency and effect. If a slightly less effective way is selected, only L1 or L2 may be selected to become progressively larger from the side where the throat 202 is located to the opposite side.

It is also possible to design the first layer of support bodies 21 to be distributed obliquely downward from the side where the feed inlet 202 is located to the opposite side, and the second layer of support bodies 22 to be distributed obliquely downward from the side where the feed inlet 202 is located to the opposite side. Like this follow-up pellet fuel 9 that gets into the combustion chamber moves the lateral part of keeping away from feed inlet 202 more easily to it is more even to let pellet fuel 9 distribute in the combustion chamber, pellet fuel 9 can pile up one deck ground, can have certain overhead space between the layer and the layer, pellet fuel 9 also can increase with the area of contact of air, the burning can be more abundant, not only combustion efficiency is high, save pellet fuel 9, but also be favorable to follow-up pellet fuel 9 that gets into the combustion chamber to cover the ashes of pellet fuel 9 of lower floor, be favorable to falling the ash. Due to the inclined distribution, the second layer of support bodies 22 located at the far right in fig. 2 may be lower than the first layer of support bodies 21 located at the far left, but this does not affect the practical application, because it is still sufficient that the first layer of support bodies 21 is lower than the adjacent second layer of support bodies 22. If a slightly less effective manner is selected, only the first layer of support bodies 21 or the second layer of support bodies 22 may be selected to be distributed obliquely downward from the side where the feed opening 202 is located to the opposite side.

The above two modes can be implemented together or separately. It is understood that the extending direction of the first layer support 21 and the second layer support 22 may be oblique to the feeding direction of the feeding port 202 or parallel to the feeding direction of the feeding port 202, and it can also refer to the distribution in the above two ways, and also has better combustion efficiency and effect.

In order to ensure the efficiency and effect of ash falling, the through hole should not be too small, but in this embodiment, the bottom opening of the burner 2 is directly designed to form the through hole, so as to obtain better efficiency and effect of ash falling. And the position that is located feed inlet 202 below on the grid structure always has the particulate fuel 9 to pile up easily, therefore can let when the air gets into combustor 2, bigger wind-force blows the particulate fuel 9 below the feed inlet 202, can design the bottom face of combustor 2 from the lateral wall that feed inlet 202 was located to relative lateral wall from high to low slope setting, the air inlet clearance 105 that forms like this is wide on the left and narrow on the right, let the particulate fuel 9 below the feed inlet 202 burn more fast, avoid piling up too high in this position, can effectively prevent the interior tempering of feedstock channel 501.

In the present embodiment, the first layer support 21 and the second layer support 22 are rod bodies. The rod body can be selected from common round rods, square rods and the like, and besides the straight rods selected in the embodiment, the bent rods can also be selected. The first layer of support 21 and the second layer of support 22 may be welded directly to the combustor 2 or may be secured by other conventional fastening means, or may be secured to a transition sleeve which is then secured to the combustor 2. In addition, since the first layer of support 21 and the second layer of support 22 in this embodiment are rod bodies, there is a gap 200 between the first layer of support 21 and the second layer of support 22 and the inner sidewall of the combustor 2, and the width of the gap 200 is also required to be smaller than D, which is not enough for the particulate fuel 9 to pass through directly.

Example two:

as shown in fig. 7, the grid structure in this embodiment is formed by a corrugated sheet metal part, a corrugated trough on the sheet metal part forms a first layer of supporting body 21, a corrugated crest on the sheet metal part forms a second layer of supporting body 22, and a through hole forming a first channel 201 is arranged between the trough and the crest on the sheet metal part. The outer periphery of the sheet metal part can be adapted to the inner side wall of the burner 2, so that the spacing mentioned in the first embodiment can be absent. In order to prevent ash from accumulating on the first layer support 21, the upper surface of the first layer support 21 may be designed to be a convex arc surface as much as possible.

Other contents not described in this embodiment may refer to embodiment one.

Example three:

in addition to providing two layers of support bodies, the number of layers can also be increased, as shown in fig. 8, the lattice structure further includes a third layer of support bodies 23 fixed to the burner 2, the third layer of support bodies 23 is higher than the second layer of support bodies 22, a second channel 203 is provided between the third layer of support bodies 23 and the second layer of support bodies 22, the width W2 of the second channel 203 is smaller than D, and the distance L3 between two adjacent third layer of support bodies 23 is larger than D and smaller than 2D. It can be understood that the number of layers of the supporting body can be increased according to actual requirements, and the ash falling effect can be better.

Other contents not described in the present embodiment may refer to the above-described embodiments.

Example four:

as shown in fig. 9 to 13, an auxiliary support 24 for maintaining the primer is provided below the first layer support 21, the auxiliary support is higher than the through hole, the auxiliary support 24 is provided at a side below the feed port 202 in a range not exceeding 1/2 of the area covered by the grid structure, 1/2 is only an approximate number, and a deviation is allowed so as not to affect normal ash falling and air intake. The addition of the auxiliary support body 24 has two functions, on one hand, in the case of a big fire, the ash falling efficiency and the air intake rate below the feed port 202 can be reduced, the combustion efficiency of the granular fuel at this position can be effectively controlled, so as to effectively avoid the backfire of the feed port 202, and on the other hand, in the case of a small fire, the bottom fire is maintained, so as to avoid extinguishment. In this embodiment, the auxiliary supporting bodies 24 are rod structures, so that a certain space is provided between adjacent auxiliary supporting bodies 24 for air intake, and the auxiliary supporting bodies can support combustion when maintaining the primer.

In the present embodiment, the first layer of support 21 and the second layer of support 22 are parallel to the feeding direction of the feeding port 202, and the auxiliary support 24 is perpendicular to the first layer of support 21 and the second layer of support 22. In addition, the auxiliary support 24 may be disposed to be inclined with respect to the first layer support 21 and the second layer support 22. In practical applications, the auxiliary support 24 may be a net structure or a plate structure with holes, or a flat plate without holes may be used as it is if the range of the auxiliary support 24 is not large. The auxiliary support 24 may also be provided in a freely removable manner, being installed in the burner 2 when desired by the user, and being removable when not desired.

In addition, in addition to the design of the burner 2 as a cylinder, the burner 2 may also be designed as a hollow prism as in the present embodiment, and specifically, the burner 2 includes a first sidewall 2001 where the feed port 202 is provided and a second sidewall 2002 and a third sidewall 2003 located on both sides of the first sidewall 2001, and the second sidewall 2002 and the third sidewall 2003 are expanded to both sides in the feeding direction to form a figure of eight. The second side wall 2002 and the third side wall 2003 form a splayed shape to avoid particulate fuel accumulation below the inlet port 202 and also to help prevent flashback at the inlet port 202. And considering that the first layer of supports 21 and the second layer of supports 22 are parallel to the feeding direction of the feeding port 202, in order to effectively utilize the gap between the sidewall of the burner 2 and the first and second layer supports 21 and 22, the burner 2 further includes a fourth sidewall 2004, a fifth sidewall 2005, and a sixth sidewall 2006, the fourth sidewall 2004 is connected to the second sidewall 2002, the fifth sidewall 2005 is connected to the third sidewall 2003, the sixth sidewall 2006 is connected to the fourth sidewall 2004 and the fifth sidewall 2005, respectively, the fourth sidewall 2004 and the fifth sidewall 2005 are parallel to the first and second layer supports 21 and 22, the gap between the fourth sidewall 2004 and the fifth sidewall 2005 and the first and second layer supports 21 and 22 has a uniform width, which is beneficial to air intake and ash falling, the sixth side wall 2006 is perpendicular to the feeding direction of the feeding port 202, so that the particulate fuel can more easily fall between the adjacent second-layer supporting bodies 22 due to rebounding after the particulate fuel collides with the sixth side wall 2006. In addition, since the frame 12 on which the burner 2 is mounted is of a rectangular parallelepiped structure as a whole, the fourth side wall 2004, the fifth side wall 2005, and the sixth side wall 2006 may be parallel to corresponding side walls of the frame 12, so that the space that cannot be used by the cylindrical burner 2 can be fully utilized, the combustion area of the burner 2 is increased, and a higher combustion effect is obtained.

In the present embodiment, the rebound damper 31 is formed directly by the inner bottom surface of the dust receiving plate 3.

In the invention, the references of parallel, vertical, inclined and crossed refer to the relation between the projections of the corresponding structures on the same horizontal plane, and the parallel and the vertical are not absolute requirements and allow certain deviation. Other embodiments of the present invention than the preferred embodiments described above, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, should fall within the scope of the present invention defined in the claims.

Claims

1. A particle combustion furnace comprises a furnace body, a combustor is arranged in the furnace body, the top end of the combustor is open, a feed port is formed in the side wall of the combustor, a fuel hopper is arranged on the outer side of the furnace body, a feed channel is arranged between the fuel hopper and the feed port, the particle combustion furnace is characterized in that a through hole for air inlet and ash falling is formed in the bottom surface of the combustor, a grid structure for supporting particle fuel is arranged above the through hole, the grid structure comprises a first layer of support body and a second layer of support body, the first layer of support body is fixed on the combustor, the first layer of support body is lower than the adjacent second layer of support body, the second layer of support body is distributed in a staggered mode in the vertical direction relative to the first layer of support body, a first channel for ash falling and air inlet is formed between the first layer of support body and the second layer of support body, the width of the first channel is, the feed inlet is located grid structure top and difference in height is H, and H is not less than 3D, and the pellet fuel whereabouts shakes the particle fuel ashes and scatters, and the through hole air inlet blows the particle fuel ashes between adjacent first floor supporter and the second floor supporter and scatters, and the bottom of furnace body is located the below of combustor and is equipped with and connects the ash tray, connects the ash tray to the through hole.

2. The particle combustion furnace as set forth in claim 1 wherein the bottom of the furnace body is provided with an ash receiving chamber in which an ash receiving pan is placed, the ash receiving pan being movable into and out of the ash receiving chamber relative to the furnace body.

3. The particle combustion furnace as set forth in claim 2 wherein the dust receiving chamber is provided with a slide rail, the dust receiving plate is connected to the slide rail, the side wall of the dust receiving chamber is provided with an opening for the dust receiving plate to pass through, and the dust receiving plate is moved into the dust receiving chamber to close the opening.

4. The particle combustion furnace as claimed in claim 1, wherein the furnace body has an air supply passage for supplying air from outside the furnace body, the burner has an air guide cover on its outer periphery, the air guide cover and the burner form an air guide passage communicating with the air supply passage, the air guide cover is provided with an annular damper below the burner, an air inlet gap is provided between the annular damper and the bottom end of the burner, an inner ring of the annular damper forms a through hole, a rebound damper is provided below the through hole, and the rebound damper faces the through hole through the through hole.

5. The particle burning furnace of claim 4, wherein the bottom end of the wind scooper is turned inward to form an annular wind shield.

6. The particle combustion furnace as claimed in claim 4, wherein the ash receiving tray is provided with a boss protruding upward, the top surface of the boss forms a rebound damper, and the caliber of the rebound damper is not smaller than that of the through hole; or the inner bottom surface of the ash receiving disc forms a rebound windshield, and the caliber of the rebound windshield is not less than that of the through hole.

7. The particle combustion furnace as claimed in claim 1, wherein the first layer support and the second layer support extend in a direction perpendicular to the feeding direction of the feed port, and the distance L1 between two adjacent first layer supports becomes gradually larger from the side of the feed port to the opposite side, and the distance L2 between two adjacent second layer supports becomes gradually larger from the side of the feed port to the opposite side; and/or the first layer of support bodies are distributed from the side part where the feed inlet is positioned to the opposite side part in an inclined and downward way, and the second layer of support bodies are distributed from the side part where the feed inlet is positioned to the opposite side part in an inclined and downward way.

8. The particle burning furnace of claim 1, wherein the bottom end of the burner is open to form a through opening.

9. The particle combustion furnace as set forth in claim 8 wherein the bottom end surface of the burner is inclined from the side wall where the feed port is located toward the opposite side wall from high to low.

10. The particle combustion furnace as claimed in claim 1, wherein an auxiliary support for maintaining the primer is provided under the first layer support, the auxiliary support is higher than the through hole, and the auxiliary support is provided at a side below the feed port in a range not exceeding 1/2 of the area covered by the lattice structure.