CN112617629B

CN112617629B - Particle combustion furnace

Info

Publication number: CN112617629B
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: 2024-04-26
Anticipated expiration: 2041-01-07
Also published as: CN112617629A

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. The automatic ash falling device is mainly used for automatic ash falling, and has good ash falling effect and convenient ash removal for users.

Description

Particle combustion furnace

Technical Field

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

Background

Existing particle burning furnaces, such as barbecue ovens, use a burner with a basically closed bottom structure, and clean ash after burning the particle fuel by a dust collector after each use, which is very inconvenient and has poor user experience. For example, a heating stove is generally provided with a layer of fire grate for ash falling, but the biomass granular fuel is generally in an extruded cylindrical structure, the diameter is 4-6 mm, the length is 1-6 cm, and the ash produced by burning the granular fuel can be kept cylindrical if no external force acts, so that the ash is difficult to fall directly, the ash falling efficiency and effect are poor, after the combustion is carried out for a long time, other parts are needed to assist, the ash is broken up to remove ash, the structure is complex, the production cost is high, the participation of users is needed, and the use is inconvenient.

Disclosure of Invention

The invention aims to provide the particle combustion furnace which is capable of automatically discharging ash, good in ash discharging effect and convenient for users to clean ash.

In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a granule fires burning furnace, including the furnace body, be equipped with the combustor in the furnace body, the top of combustor is uncovered, the lateral wall of combustor is equipped with the feed inlet, the furnace body outside is equipped with the fuel hopper, be equipped with feed channel between fuel hopper and the feed inlet, the bottom surface of combustor is equipped with the through-hole that is used for air inlet and fall ash, the through-hole top is equipped with the grid structure that supports granule fuel, the grid structure is including being fixed in the first layer supporter and the second layer supporter of combustor, first layer supporter is less than adjacent second layer supporter, the second layer supporter staggers the distribution on the vertical direction relative first layer supporter, first layer supporter and second layer supporter have between them and be used for falling ash and the first passageway of air inlet, the width of first passageway is less than the diameter D of granule fuel, interval L2 between two adjacent second layer supporters is greater than D and is less than 2D, the feed inlet is located grid structure top and the difference in height is H, the difference is not less than 3D, granule fuel whereabouts shakes granule fuel ashes down, the through-hole is with the ash of adjacent first layer supporter and second layer supporter and the ash is located the bottom of the combustor of the face of the combustor, the ash of the combustor that falls down is equipped with the ash pan.

Further, an ash receiving cavity for placing an ash receiving tray is arranged at the bottom of the furnace body, and the ash receiving tray can move in or out of the ash receiving cavity relative to the furnace body.

Further, a sliding rail is arranged in the ash receiving cavity, the ash receiving disc is connected to the sliding rail, an opening for the ash receiving disc to pass through is formed in the side wall of the ash receiving cavity, and the ash receiving disc moves into the ash receiving cavity to close the opening.

Further, the furnace body is provided with an air supply channel for supplying air from the outside of the furnace body, the periphery of the burner is provided with a wind scooper, a wind guide channel communicated with the air supply channel is formed between the wind scooper and the burner, an annular windshield is arranged below the burner on the wind scooper, an air inlet gap is formed between the annular windshield and the bottom end of the burner, 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.

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

Further, an upward protruding 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 smaller than that of the through hole; or the inner bottom surface of the ash receiving tray forms a rebound windshield, and the caliber of the rebound windshield is not smaller than that of the through hole.

Further, the extending directions of the first layer of supporting bodies and the second layer of supporting bodies are perpendicular to the feeding direction of the feeding hole, the distance L1 between the two adjacent first layer of supporting bodies gradually increases from the side where the feeding hole is located to the opposite side, and the distance L2 between the two adjacent second layer of supporting bodies gradually increases from the side where the feeding hole is located to the opposite side; and/or the first layer of supporting bodies are distributed downwards in an inclined manner from the side where the feeding hole is located to the opposite side, and the second layer of supporting bodies are distributed downwards in an inclined manner from the side where the feeding hole is located to the opposite side.

Further, a through hole is formed at the bottom end of the burner.

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

Further, an auxiliary support body for maintaining 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 arranged in a range not exceeding 1/2 of the coverage area of the grid structure.

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

The grid structure is designed to support the particle fuel, the width of the first channel is smaller than the diameter D of the particle fuel, and because the distance L2 between two adjacent second-layer supporting bodies is larger than D and smaller than 2D, the particle fuel can enter between the two adjacent second-layer supporting bodies and is prevented from falling directly from the first channel, the particle fuel entering between the two adjacent second-layer supporting bodies can overhead the particle fuel above the first channel, and the two adjacent second-layer supporting bodies are difficult to enter the two particle fuels side by side, so that the contact area between the particle fuel and air can be increased, the combustion efficiency is effectively improved, and through experimental measurement and calculation, 25% of fuel can be saved; the particle fuel burns from low to high, the particle fuel between two adjacent second-layer supports burns into ash first, in order to improve the ash falling efficiency, the first is to design the feed inlet to be positioned above the grid structure and the height difference H not smaller than 3D, the particle fuel is conveyed to enter the combustion chamber and is influenced by gravity to roll down, so the burning particle fuel is vibrated, the particle fuel between two adjacent second-layer supports does not enter the two particle fuels side by side, but the particle fuel above the two adjacent second-layer supports is necessarily contacted with and presses the particle fuel below, the acting force generated when the subsequent particle fuel is conveyed to enter the combustion chamber is finally transmitted to the particle fuel ash between the two adjacent second-layer supports, so that the particle fuel ash is scattered, the through hole is used for large-area air inlet, the ash after the particle fuel is burnt is prevented from accumulating at the bottom of the burner, the air flow upwards flows through the first channel to automatically scatter the particle fuel between the two adjacent second-layer supports, and the ash is automatically scattered by the first channel, and the ash is not scattered, and the particle ash is not scattered on the first channel is also prevented from falling down, and the current position is not caused; considering that ash falls downwards, but the air flows upwards, the motion direction of the two is opposite, in order to avoid mutual influence, the second layer support body is designed to be staggered and distributed in the vertical direction relative to the first layer support body, namely, the second layer support body and the first layer support body are not completely overlapped in the vertical direction, the first channels formed in this way are inclined, air flows passing through two adjacent first channels can mutually offset, ash can be blown away, and the blocking of the above granular fuel is carried out, so that the air flows are insufficient to provide lifting force to enable ash to fall without overcoming gravity, and the ash can continuously fall after being matched with the space where the above fuel particles fall to occupy the original ash.

Drawings

The invention is further described below with reference to the accompanying drawings:

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

FIG. 2 is an enlarged view of the portion I of FIG. 1;

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

FIG. 4 is a schematic view of a first embodiment of the invention wherein particulate fuel is deposited on a grid structure;

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

FIG. 6 is a bottom view of a burner according to a first embodiment of the present invention;

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

FIG. 8 is a cross-sectional view of a burner in accordance with a third embodiment of the present invention;

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

Fig. 10 is an enlarged view at III in 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 in accordance with a fourth embodiment of the present invention;

fig. 13 is a schematic view of an ash tray in a fourth embodiment of the invention.

Detailed Description

In brief description, the term "pellet fuel" as used herein refers to cylindrical pellets obtained by extrusion molding of biomass raw materials such as woody plant chips, and the diameter of pellet fuel suitable for a pellet burner having a fixed size range is substantially fixed.

Embodiment one:

The invention provides a particle combustion furnace, as shown in fig. 1-6, which comprises a furnace body 1, wherein a combustor 2 is arranged in the furnace body 1, the top end of the combustor 2 is open, the side wall of the combustor 2 is provided with a feed inlet 202, the outer side of the furnace body 1 is provided with a fuel hopper 5, a feed channel 501 is arranged between the fuel hopper 5 and the feed inlet 202, the bottom surface of the combustor is provided with a through hole for air inlet and ash falling, a grid structure for supporting particle fuel 9 is arranged above the through hole, the grid structure comprises a first layer support 21 and a second layer support 22 which are fixed on the combustor 2, the first layer support 21 is lower than the adjacent second layer support 22, the second layer support 22 is staggered and distributed in the vertical direction relative to the first layer support 21, a first channel 201 for ash falling and air inlet is arranged between the first layer support 21 and the second layer support 22, the width W1 of the first channel 201 is smaller than the diameter D of the particle fuel 9, the distance L2 between the adjacent two second layer supports 22 is larger than D and smaller than 2D, the feed inlet is positioned above the grid structure and is higher than the first layer support 3H, the ash falling between the adjacent layers of the combustor and the ash falling plate is arranged below the second layer support 3H, and the ash falling on the bottom of the combustor is arranged below the adjacent layer support 3.

According to the invention, the bottom end of the combustor 2 is designed to be an open structure, so that ash generated after the combustion of the granular fuel 9 is prevented from accumulating at the bottom of the combustor 2, a grid structure is designed for supporting the granular fuel 9, the width of the first channel 201 is smaller than the diameter D of the granular fuel 9, and the granular fuel 9 enters between two adjacent second-layer supporting bodies 22 and cannot fall off from the first channel 201 directly because the distance L2 between the two adjacent second-layer supporting bodies 22 is larger than D and smaller than 2D, the granular fuel 9 firstly enters between the two adjacent second-layer supporting bodies 22 and can naturally overhead the granular fuel 9 above, and the two adjacent second-layer supporting bodies 22 cannot enter the two granular fuels 9 side by side, so that the contact area of the granular fuel 9 and air is increased, the combustion efficiency is effectively improved, and the fuel can be saved by 25% through experimental measurement; the granular fuel 9 burns from low to high, the granular fuel 9 between two adjacent second-layer supporting bodies 22 burns into ash first, so in order to improve the ash falling efficiency, the first is that a feed port is arranged on the side wall of the burner, the granular fuel is conveyed into a combustion cavity and rolls down under the influence of gravity, so the granular fuel below the feed port vibrates, and the two adjacent second-layer supporting bodies do not enter two granular fuels side by side, so the acting force generated when the granular fuel is conveyed into the combustion cavity can be necessarily transferred to the granular fuel ash between the two adjacent second-layer supporting bodies, ash generated after the granular fuel burns can be dispersed, the second is that the first channel 201 is used for air inlet at the same time, the air flows upwards through the first-layer supporting body 21 and the second-layer supporting body 22, once the ash generated after the granular fuel 9 burns is dispersed, the granular fuel 9 above the ash falls down, and the ash is caused to fall from the first channel 201 without maintaining the current position; considering that ash falls downwards and air flows upwards, the movement directions of the two are opposite, in order to avoid mutual influence, the second layer support body 22 is designed to be staggered and distributed relative to the first layer support body 21 in the vertical direction, namely, the second layer support body 22 and the first layer support body 21 cannot be 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 mutually offset, ash can be blown away, the blocking of the above granular fuel 9 is carried out, the air is insufficient to provide lifting force to enable the ash to fall off against gravity, the space where the above fuel particles fall to occupy the original ash is matched, the ash can fall into the ash receiving disc 3 continuously, and the ash is circulated in this way, so that the automatic and efficient ash falling in the combustor 2 is realized, the ash falling effect is very good, the ash is not required to be removed with the assistance of other parts, the ash receiving disc 3 is only required to be blown away by a user, the ash collecting experience is improved by the user regularly, and the use of the ash receiving disc is improved greatly.

The extending directions of the first layer support body and the second layer support body are basically consistent, a certain inclination can be realized between the first layer support body and the second layer support body, the size requirement is met, the particle fuel which firstly enters the combustion chamber can fall onto the first layer support 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 an ash receiving tray 3 can be arranged at the bottom of the furnace body 1, and the ash receiving tray 3 can move in or out of the ash receiving cavity 101 relative to the furnace body 1. For convenience of user operation, take out or install and connect ash pan 3, can be equipped with slide rail 11 in connecing ash chamber 101, connect ash pan 3 to connect in slide rail 11, connect the lateral wall in ash chamber 101 to be equipped with the opening 102 that supplies to connect ash pan 3 to pass, connect ash pan 3 to move into and connect ash chamber 101 and close opening 102, can avoid ashes to fly out through opening 102.

In order to support combustion and improve the combustion efficiency of the granular fuel 9, the furnace body 1 is provided with an air supply channel 103 for supplying air from the outside of the furnace body 1, compared with the mode of directly supplying air to the burner 2 from the side in the prior art, in this embodiment, the mode of supplying air from the bottom of the burner 2 is adopted, specifically, an air guide cover 4 can be arranged at the periphery of the burner 2, an air guide channel 104 communicated with the air supply channel 103 is formed between the air guide cover 4 and the burner 2, an annular windshield 41 is arranged on the air guide cover 4 and below the burner 2, an air inlet gap 105 is formed between the annular windshield 41 and the bottom end of the burner 2, a through hole 411 is formed at the inner ring of the annular windshield 41, a rebound windshield 31 is arranged below the through hole 411, and the rebound windshield 31 faces the through hole 411. The air in the air guide channel 104 flows downwards, changes the flowing direction when encountering the annular windshield 41 and changes to flow outwards and inwards, after passing through the narrow air inlet gap 105, a part of air can enter the burner 2 upwards, a part of air can pass through the through holes 411 downwards, after encountering the rebound windshield 31, the part of air can be divided into a part of air flowing around the ash receiving tray 3 and a part of air flowing upwards in rebound, the part of air flowing around the ash receiving tray 3 can blow ash on the rebound windshield 31 around the ash receiving tray 3, and the part of air flowing upwards in rebound and the air directly entering the burner 2 upwards form a first-after-step combustion air flowing effect, as shown by the arrow in fig. 3, not only has a good combustion supporting effect, but also can blow ash of the granular fuel 9 better.

In this embodiment, for convenience of processing and assembly, the annular windshield 41 may be formed by directly flanging inward the bottom end of the air guide housing 4. In addition, a boss 32 protruding upward may be provided in the ash tray 3, and a rebound damper 31 may be formed on the top surface of the boss 32, and the diameter of the rebound damper 31 may be not smaller than the diameter of the through hole 411. It will be appreciated that the rebound damper 31 may alternatively be secured to the furnace body 1, the hood 4 or the burner 2. In order to avoid ash flying in the furnace body 1, the bottom end of the air guide cover 4 can be extended into the ash receiving cavity 101, and the outer wall of the air guide cover 4 is in closed connection with the furnace body 1, 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 designed to 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 feeding direction in the horizontal plane projection, for example, as shown in fig. 6, while the interval L1 between two adjacent first layer supports 21 is designed to be gradually increased from the side where the feeding port 202 is located to the opposite side, and the interval L2 between two adjacent second layer supports 22 is designed to be gradually increased from the side where the feeding port 202 is located to the opposite side, i.e., to be gradually increased from left to right in fig. 3. Thus, the position far away from the feed inlet 202 is not easy to stack up, more granular fuel 9 can be accommodated, and the granular fuel 9 entering later can move to the position far away from the feed inlet 202, so that the granular fuel 9 is uniformly distributed in the combustor 2, and the combustion efficiency and effect are improved. If a slightly less effective manner is selected, only L1 or L2 may be selected to become progressively larger from the side where the feed port 202 is located to the opposite side.

It is also possible to design the first layer support 21 to be distributed obliquely downward from the side where the feed opening 202 is located to the opposite side, and the second layer support 22 to be distributed obliquely downward from the side where the feed opening 202 is located to the opposite side. Thus, the particle fuel 9 which subsequently enters the combustion chamber moves to the side part far away from the feed inlet 202 more easily, so that the particle fuel 9 is distributed uniformly in the combustion chamber, the particle fuel 9 can be stacked layer by layer, a certain overhead space can be reserved between the layers, the contact area between the particle fuel 9 and air can be increased, the combustion can be more sufficient, the combustion efficiency is high, the particle fuel 9 is saved, and the ash of the particle fuel 9 which subsequently enters the combustion chamber and covers the lower layer is also facilitated, so that the ash falling is facilitated. Since the second layer support 22 located at the rightmost side in fig. 2 may be lower than the first layer support 21 at the leftmost side after the oblique distribution, this does not affect the practical application, since the aforementioned first layer support 21 is still lower than the adjacent second layer support 22. If a slightly less effective manner is selected, only the first layer support 21 or the second layer support 22 may be selected to be distributed obliquely downward from the side where the feed port 202 is located to the opposite side.

The two modes can be implemented together or separately. It will be appreciated that the extending direction of the first layer support 21 and the second layer support 22 may be inclined to the feeding direction of the feeding port 202 or parallel to the feeding direction of the feeding port 202, and may be distributed by the above two modes, which has better combustion efficiency and effect.

In order to ensure the ash falling efficiency and effect, the through hole is not too small, but in the embodiment, the bottom end opening of the burner 2 is directly designed to form the through hole, so that better ash falling efficiency and effect can be obtained. The grid structure is positioned below the feed inlet 202, so that the particle fuel 9 is easy to accumulate, when air enters the burner 2, larger wind force blows the particle fuel 9 below the feed inlet 202, the bottom end surface of the burner 2 can be obliquely arranged from the side wall of the feed inlet 202 to the opposite side wall from high to low, and the left and right air inlet gaps 105 are formed, so that the particle fuel 9 below the feed inlet 202 burns faster, the phenomenon that the particle fuel 9 is excessively accumulated at the position is avoided, and tempering in the feed channel 501 can be effectively prevented.

In the present embodiment, the first layer support 21 and the second layer support 22 are rod bodies. The rod body can be a common round rod, a square rod and the like, and besides the straight rod selected in the embodiment, a bent rod can also be selected. The first layer 21 and the second layer 22 may be welded directly to the burner 2 or may be fixed by other common fixing means, or may be fixed to a transition sleeve, which is then fixed to the burner 2. In addition, since the first layer support 21 and the second layer support 22 are rod bodies in the present embodiment, there is a space 200 between the first layer support 21, the second layer support 22 and the inner sidewall of the burner 2, and the width of the space 200 needs to be smaller than D, which is not enough to allow the pellet fuel 9 to pass through directly.

Embodiment two:

As shown in fig. 7, the grid structure in this embodiment is formed by a wave-shaped sheet metal part, a wave-shaped trough on the sheet metal part forms a first layer of supporting body 21, a wave-shaped 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 circumference of the sheet metal part may be adapted to the inner side wall of the burner 2, so that the mentioned interval of embodiment one may not be present. To prevent ash from accumulating on the first layer support 21, the upper surface of the first layer support 21 may be designed as a convex arc surface as much as possible.

Other matters not described in this embodiment can refer to embodiment one.

Embodiment III:

In addition to providing two layers of support bodies, the number of layers can be increased on the basis, as shown in fig. 8, the grid structure further comprises a third layer of support bodies 23 fixed on the burner 2, the third layer of support bodies 23 are higher than the second layer of support bodies 22, a second channel 203 is arranged 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 needs, and the ash falling effect can be better.

Other matters not described in this embodiment can refer to the above-described embodiments.

Embodiment 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 located at one side below the feed hole 202 and is arranged in a range not exceeding 1/2 of the coverage area of the grid structure, and 1/2 is only a general number, so that deviation is allowed, and normal ash falling and air intake are not affected. The auxiliary supporting body 24 has two functions, on one hand, in the state of big fire, the ash falling efficiency and the air intake quantity below the feeding hole 202 can be reduced, the combustion efficiency of the granular fuel at the position can be effectively controlled, so that the tempering condition of the feeding hole 202 can be effectively avoided, and on the other hand, in the state of small fire, the primer is maintained, and the extinction is avoided. In this embodiment, the auxiliary supporting bodies 24 adopt a rod structure, so that a certain space is also provided between adjacent auxiliary supporting bodies 24 to intake air, so as to support combustion supporting during the primer.

In the present embodiment, the first layer support 21 and the second layer support 22 are parallel to the feeding direction of the feeding port 202, and the auxiliary support 24 is perpendicular to the first layer support 21 and the second layer support 22. In addition, the auxiliary supporting body 24 may be disposed obliquely to the first layer supporting body 21 and the second layer supporting body 22. In practical applications, the auxiliary supporting body 24 may also be a net-like structure or a plate-like structure with small holes, and if the auxiliary supporting body 24 is not large in scope, a plate without holes may also be directly used. The auxiliary support 24 may also be arranged in a freely removable manner, to be installed in the burner 2 when desired by the user, and to be removable when not desired.

In addition, instead of designing the burner 2 in a cylindrical shape, it is also possible to design it in a hollow prismatic shape as in the present embodiment, specifically, the burner 2 includes a first side wall 2001 where the feed port 202 is provided, and a second side wall 2002 and a third side wall 2003 located on both sides of the first side wall 2001, and the second side wall 2002 and the third side wall 2003 are expanded to both sides in the feed direction to form a splayed shape. The splayed shape of the second side wall 2002 and the third side wall 2003 can avoid accumulation of particulate fuel below the feed inlet 202 and is also beneficial for preventing flashback at the feed inlet 202. Considering that the first layer support 21 and the second layer support 22 are parallel to the feeding direction of the feeding port 202, in order to effectively utilize the gaps between the side walls of the burner 2 and the first layer support 21 and the second layer support 22, the burner 2 further comprises a fourth side wall 2004, a fifth side wall 2005 and a sixth side wall 2006, the fourth side wall 2004 is connected with the second side wall 2002, the fifth side wall 2005 is connected with the third side wall 2003, the sixth side wall 2006 is connected with the fourth side wall 2004 and the fifth side wall 2005 respectively, the fourth side wall 2004 and the fifth side wall 2005 are parallel to the first layer support 21 and the second layer support 22, the gap widths between the fourth side wall 2004 and the fifth side wall 2005 and the first layer support 21 and the second layer support 22 are uniform, which is beneficial to air intake and ash falling, and the sixth side wall 2006 is perpendicular to the feeding direction of the feeding port 202, so that the granular fuel can more easily fall between the adjacent second layer supports 22 due to rebound after being impacted on the sixth side wall. In addition, since the frame 12 on which the burner 2 is mounted has 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 the corresponding side walls on the frame 12, so that the space that the cylindrical burner 2 cannot use can be fully utilized, the combustion area of the burner 2 can be increased, and a higher combustion effect can be advantageously obtained.

In this embodiment, the rebound damper 31 is formed directly by the inner bottom surface of the dust pan 3.

In the present invention, all references to parallel, perpendicular, oblique and intersecting refer to the relationship between projections of corresponding structures on the same horizontal plane, and parallel and perpendicular are not absolute requirements, allowing for certain deviations. In addition to the above preferred embodiments, the present invention has other embodiments, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the invention, which shall fall within the scope of the invention as defined in the appended claims.

Claims

1. The particle combustion furnace comprises a furnace body, wherein a burner is arranged in the furnace body, the top end of the burner is open, the side wall of the burner is provided with a feed inlet, the outside of the furnace body is provided with a fuel hopper, and a feed channel is arranged between the fuel hopper and the feed inlet; the furnace body is provided with an air supply channel for supplying air from the outside of the furnace body, the periphery of the burner is provided with an air guide cover, an air guide channel communicated with the air supply channel is formed between the air guide cover and the burner, an annular windshield is arranged on the air guide cover and positioned below the burner, an air inlet gap is formed between the annular windshield and the bottom end of the burner, 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 through hole through the through hole; an upward protruding 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 smaller than that of the through hole; or the inner bottom surface of the ash receiving tray forms a rebound windshield, and the caliber of the rebound windshield is not smaller than that of the through hole.

2. The pellet burner according to claim 1, wherein the bottom of the furnace body is provided with an ash receiving cavity in which an ash receiving tray is placed, the ash receiving tray being movable into and out of the ash receiving cavity relative to the furnace body.

3. The pellet burner according to claim 2, wherein the ash receiving cavity is provided with a sliding rail, the ash receiving tray is connected to the sliding rail, the side wall of the ash receiving cavity is provided with an opening for the ash receiving tray to pass through, and the ash receiving tray moves into the ash receiving cavity to close the opening.

4. The pellet burner according to claim 1, wherein the bottom end of the hood is turned inwardly to form an annular windshield.

5. The pellet burner according to claim 1, wherein the extending directions of the first-layer support bodies and the second-layer support bodies are perpendicular to the feeding direction of the feeding port, the distance L1 between the adjacent two first-layer support bodies is gradually increased from the side where the feeding port is located to the opposite side, and the distance L2 between the adjacent two second-layer support bodies is gradually increased from the side where the feeding port is located to the opposite side; and/or the first layer of supporting bodies are distributed downwards in an inclined manner from the side where the feeding hole is located to the opposite side, and the second layer of supporting bodies are distributed downwards in an inclined manner from the side where the feeding hole is located to the opposite side.

6. The pellet burner according to claim 1, wherein the burner is open at its bottom end to form a through opening.

7. The pellet burner according to claim 6, wherein the bottom end surface of the burner is inclined from the side wall where the feed port is located to the opposite side wall from high to low.

8. The pellet burner according to claim 1, wherein an auxiliary support for maintaining the primer is provided below the first layer support, the auxiliary support being higher than the through hole, the auxiliary support being located at a side below the feed hole and being provided in a range not exceeding 1/2 of an area covered by the grid structure.