Layer combustion progressive combustion stove

Abstract

The present invention provides a layer-burning progressive combustion furnace, which belongs to the field of biomass stoves, and includes a furnace body, a material channel pipe and a gasification cylinder. The furnace body is provided with a furnace, a furnace mouth connected to the furnace, and a grate located below the furnace. The material channel pipe is arranged on the furnace body, and the material feeding end extends into the furnace, and is used to transport fuel to the grate. The gasification cylinder is arranged in the furnace mouth, and the air inlet end extends into the furnace and is provided with a material blocking part, which is arranged opposite to the material feeding end and is used to block the fuel on the grate to block the material feeding end. The layer-burning progressive combustion stove of the present invention can fill a large amount of biomass fuel into the material channel pipe at one time, and the biomass fuel flows out from the material feeding end and is blocked on the grate by the material blocking part on the air inlet end of the gasification cylinder to block the material feeding end. After the biomass fuel on the grate is burned, the biomass fuel in the material channel pipe will be replenished on the grate until the biomass fuel in the material channel pipe is completely burned, thereby reducing the number of times the operator fills the material and reducing the labor intensity.

Description

Technical Field

[0001] The invention belongs to the technical field of biomass stoves, and more specifically, relates to a layer-burning progressive combustion stove. Background Art

[0002] When using the existing biomass fuel stove, the operator needs to first fill the biomass fuel into the furnace through the filling port, then close the filling port for combustion, and when the fuel in the furnace is about to burn out, manually add biomass fuel into the furnace again, and repeat this cycle to keep the biomass fuel stove burning continuously. Due to the fast burning speed of biomass fuel, the biomass fuel in the furnace can only maintain a short burning time. Therefore, in order to maintain the long-term continuous combustion of the biomass fuel stove, the operator needs to frequently perform the filling operation, resulting in high labor intensity for the operator. Summary of the invention

[0003] The purpose of the present invention is to provide a layer-burning progressive combustion stove to solve the technical problems in the prior art that maintaining the biomass fuel stove for a long time requires the operator to frequently perform filling operations, which results in high labor intensity for the operator.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is to provide a layer-burning progressive combustion stove, comprising:

[0005] A furnace body, comprising a furnace, a furnace opening communicated with the furnace, and a grate located below the furnace;

[0006] A material channel pipe, arranged on the furnace body, with a material feeding end extending into the furnace, for conveying fuel to the grate; and

[0007] The gasification cylinder is arranged in the furnace mouth, the air inlet end extends into the furnace and is provided with a material blocking part, the material blocking part is arranged opposite to the material feeding end, and is used to block the fuel on the grate to block the material feeding end.

[0008] Furthermore, the material blocking portion is arranged on a side of the gasification cylinder air inlet end away from the material delivery end.

[0009] Furthermore, the material blocking portion is an arc-shaped plate with a concave side facing the material feeding end.

[0010] Furthermore, two gathering baffles arranged at intervals are provided in the furnace, and a material guide trough is formed between the two gathering baffles, one end of which is connected to the material feeding end and the other end of which faces the grate.

[0011] Furthermore, the grate is recessed on the bottom wall of the furnace.

[0012] Furthermore, the layer-burning progressive combustion stove also includes a fuel tank, and the bottom of the fuel tank is connected to the feed end of the material channel pipe.

[0013] Furthermore, the bottom of the fuel tank is connected to the feed end of the feed channel pipe through an electric feed mechanism.

[0014] Furthermore, the grate comprises a plurality of grate bars arranged in a grid shape, the cross section of the grate bar is flat and the long axis of the cross section is arranged in the vertical direction, and a single grate bar is used to cut ash after fuel combustion.

[0015] Furthermore, the grate also includes a baffle plate, which surrounds the multiple grate bars and forms a combustion chamber above the multiple grate bars.

[0016] Furthermore, a side of the baffle plate close to the material feeding end is provided with a notch for avoiding the material feeding end or the fuel transported by the material feeding end.

[0017] The beneficial effect of the layered progressive combustion stove provided by the present invention is that compared with the prior art, when the layered progressive combustion stove of the present invention is used, more biomass fuel can be filled into the material channel pipe at one time, so that the biomass fuel flows out from the feed end and is blocked on the grate by the material blocking part on the air inlet end of the gasification cylinder. As the biomass fuel on the grate gradually increases, the biomass fuel gradually blocks the feed end, so that the biomass fuel in the material channel pipe no longer flows to the grate. After that, after the biomass fuel on the grate is burned, the biomass fuel in the material channel pipe will continue to be replenished from the feed end to the grate until the feed end is blocked again. This cycle is repeated until the biomass fuel in the material channel pipe is completely burned, and the operator is required to add fuel to the material channel pipe again, which reduces the number of times the operator fills the material and reduces labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A cross-sectional view of a layer-burning progressive combustion stove provided by an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Cross-sectional view at AA in the middle, in which the material channel pipe is not cut.

[0021] Among them, the reference numerals in the figure are:

[0022] 1-furnace body; 11-furnace chamber; 12-furnace mouth; 13-grate; 131-grate bar; 132-enclosing baffle; 133-combustion chamber; 2-material channel pipe; 21-material feeding end; 3-gasification cylinder; 31-material blocking part; 4-gathering baffle; 5-fuel tank; 6-electric feeding mechanism. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] Please also read Figure 1 and Figure 2 The layer-burning progressive combustion stove provided by the embodiment of the present invention is now described. The layer-burning progressive combustion stove comprises a stove body 1 , a material channel pipe 2 and a gasification cylinder 3 .

[0025] The furnace body 1 is provided with a furnace 11, a furnace mouth 12 connected to the furnace 11, and a grate 13 located below the furnace 11. The material channel pipe 2 is provided on the furnace body 1, and the material delivery end 21 extends into the furnace 11, and is used to deliver fuel to the grate 13. The gasification cylinder 3 is provided in the furnace mouth 12, and the air inlet end extends into the furnace 11 and is provided with a material blocking portion 31, which is arranged opposite to the material delivery end 21, and is used to block the fuel on the grate 13 to block the material delivery end 21.

[0026] Compared with the prior art, the layered progressive combustion stove of the embodiment of the present invention can fill more biomass fuel into the material channel pipe 2 at one time when in use, so that the biomass fuel flows out from the feed end 21 and is blocked on the grate 13 by the material blocking portion 31 on the air inlet end of the gasification cylinder 3. As the biomass fuel on the grate 13 gradually increases, the biomass fuel gradually blocks the feed end 21, so that the biomass fuel in the material channel pipe 2 no longer flows to the grate 13. After that, after the biomass fuel on the grate 13 is burned, the biomass fuel in the material channel pipe 2 will continue to be replenished from the feed end 21 to the grate 13 until the feed end 21 is blocked again. This cycle is repeated until the biomass fuel in the material channel pipe 2 is completely burned, and the operator is required to add fuel to the material channel pipe 2 again, thereby reducing the number of times the operator fills the material and reducing labor intensity.

[0027] In addition, during the combustion process, the lower layer of the biomass fuel on the grate 13 burns first, and the upper layer is continuously supplemented with biomass fuel from the feed end 21, so that the combustion effect of the biomass fuel is better. Moreover, the air inlet end extends into the furnace 11, and the heat in the furnace 11 can be used to preheat the biomass fuel in the material channel pipe 2, and the preheated biomass fuel is easier to burn after entering the furnace 11.

[0028] Specifically, biomass fuel generally refers to biomass briquettes or biomass pellets processed from biomass such as straw. The furnace body 1 can adopt the furnace body 1 of a general biomass heating furnace or the furnace body 1 of a biomass barbecue furnace that uses biomass briquettes or biomass pellets as fuel. The furnace body 1 can be a shell with steel plates welded on the outside, and a refractory layer made of refractory material is arranged on the inner wall of the shell to form a furnace 11. The furnace mouth 12 is arranged at the top of the furnace body 1 and is connected to the furnace 11 downward. A grate 13 is arranged below the furnace 11, and the grate 13 supports the biomass fuel in the furnace 11, which is conducive to the combustion of the biomass fuel. The ash after the combustion of the biomass fuel will fall from the ash-falling gap of the grate 13 into the ash storage cavity below.

[0029] The material channel pipe 2 can be a cylindrical tube or a square tube. One end of the material channel pipe 2 is inclined downward through the side wall of the furnace body 1 and enters the furnace 11 to form a feeding end 21. The feeding end 21 is located on one side of the space above the grate 13, and the opening faces the space above the grate 13, so that the biomass fuel in the material channel pipe 2 can naturally fall from the feeding end 21 under the action of its own gravity, and fall on the grate 13 under the action of inertia. The other end of the material channel pipe 2 is a feeding end exposed outside the furnace body 1, which is used to fill the fuel into the material channel pipe 2, and can be directly opened and provided with a cover plate for sealing the end.

[0030] The gasification tube 3 can adopt the gasification tube 3 of the existing biomass combustion furnace. The gasification tube 3 can be a cylindrical shape with a circular or square cross-section, and its upper and lower ends are open. The lower end of the gasification tube 3 is the air inlet end, which penetrates into the furnace 11 from the furnace mouth 12 to collect the combustible gas formed by the incomplete combustion of the biomass fuel in the furnace 11. The upper end of the gasification tube 3 is the gas outlet end, which penetrates out of the furnace 11 from the furnace mouth 12 to guide the combustible gas out, and mix the combustible gas with the air outside the furnace 11 for combustion. More specifically, an air duct is provided on the furnace body 1, and an interlayer connected to the air duct is provided at the furnace mouth 12 of the furnace body 1. The side wall of the gas outlet end of the gasification tube 3 is provided with a plurality of through holes opposite to the interlayer. The air duct on the furnace body 1 passes air into the gas outlet end of the gasification tube 3 through the interlayer and the through holes at the gas outlet end of the gasification tube 3 for combustion.

[0031] The material blocking portion 31 can be formed by extending downward from the side wall of the air inlet end of the gasification cylinder 3. The material blocking portion 31 can be located above the grate 13 and is opposite to the opening of the material conveying end 21 of the material channel pipe 2 at a certain distance, so that after the biomass fuel flows out from the opening of the material conveying end 21 of the material channel pipe 2, it impacts the material blocking portion 31, and the biomass fuel is blocked by the material blocking portion 31 and falls onto the grate 13.

[0032] See also Figure 1 and Figure 2As a specific embodiment of the layer-burning progressive combustion stove provided by the present invention, the material blocking portion 31 is arranged on the side of the gasification cylinder 3 gas inlet end away from the material feeding end 21. With this arrangement, the material blocking portion 31 blocks the biomass fuel below the gasification cylinder 3 gas inlet end, so that the gasification cylinder 3 gas inlet end can be directly opposite to the biomass fuel on the grate 13, which is convenient for the gasification cylinder 3 gas inlet end to collect the combustible gas formed by the combustion of the biomass fuel.

[0033] See also Figure 1 and Figure 2 As a specific embodiment of the layer-burning progressive combustion stove provided by the present invention, the material blocking portion 31 is an arc-shaped plate with a concave side facing the material feeding end 21. After the biomass fuel flows out from the opening of the material feeding end 21 of the material channel pipe 2, it impacts the concave side of the arc-shaped plate, and the biomass fuel is gathered on the grate 13 below the air inlet end of the gasification cylinder 3.

[0034] Specifically, the material blocking portion 31 is formed by extending downward from the side wall of the gasification cylinder 3 on the side of the air inlet end away from the material feeding end 21 and is in the form of an arc curved surface.

[0035] See also Figure 1 and Figure 2 As a specific embodiment of the layer-burning progressive combustion stove provided by the present invention, two gathering baffles 4 are arranged at intervals in the furnace 11, and a material guide trough is formed between the two gathering baffles 4, one end of which is connected to the feeding end 21 and the other end is facing the grate 13. The ends of the two gathering baffles 4 close to the grate 13 are respectively blocked on both sides of the space above the grate 13. This arrangement allows the biomass fuel coming out of the feeding end of the material channel pipe to enter the combustion chamber through the material guide trough.

[0036] Specifically, two gathering baffles 4 are arranged at a certain distance and in an eight-shaped shape on the bottom surface of the furnace 11, and a material guide trough with one end larger and the other end smaller is formed between the two. The ends of the two gathering baffles 4 that are closer together are clamped on both sides of the feeding end 21. The ends of the two gathering baffles 4 that are farther apart are clamped on both sides of the space above the grate 13 to prevent the biomass fuel on the grate 13 from scattering to both sides.

[0037] See also Figure 1 and Figure 2 As a specific embodiment of the layer-burning progressive combustion stove provided by the present invention, the grate 13 is recessed on the bottom wall of the furnace 11. This arrangement allows the biomass fuel to naturally accumulate on the grate 13, so that the biomass fuel can be concentrated on the grate 13 for combustion.

[0038] Specifically, a vertical through hole may be provided at the center of the bottom wall of the furnace 11 , and the grate 13 is installed in the through hole at a position lower than the bottom surface of the furnace 11 .

[0039] See also Figure 1and Figure 2 As a specific embodiment of the layer-burning progressive combustion stove provided by the present invention, the layer-burning progressive combustion stove also includes a fuel tank 5, and the bottom of the fuel tank 5 is connected to the feed end of the material channel pipe 2. The fuel tank 5 can accommodate more biomass fuel, and the biomass fuel in the fuel tank 5 enters the material channel pipe 2 from the feed end, which can further reduce the number of times the operator fills the material.

[0040] Specifically, the fuel tank 5 is fixed on the outer wall of the furnace body 1, and its lower part is conical and the lowest point is connected to the feeding end of the material channel pipe 2, so that the biomass fuel in the fuel tank 5 can automatically enter the material channel pipe 2. The top of the fuel tank 5 is provided with a feeding port and a cover plate that can open or close the feeding port.

[0041] See also Figure 1 and Figure 2 As a specific embodiment of the layer combustion progressive combustion stove provided by the present invention, the bottom of the fuel tank 5 is connected to the feeding end of the material channel pipe 2 through the electric feeding mechanism 6. The electric feeding mechanism 6 can be controlled by an electric control switch to control the amount of biomass fuel entering the material channel pipe 2 from the fuel tank 5.

[0042] Specifically, the electric feeding mechanism 6 can be a screw conveying mechanism driven by a motor, and the screw conveying mechanism includes a sleeve and a screw rod coaxially arranged in the sleeve. One end of the sleeve is connected to the bottom of the fuel tank 5, and the other end is connected to the feeding end of the material channel pipe 2. One end of the screw rod is driven by the motor, and the biomass fuel in the fuel tank 5 is fed into the material channel pipe 2 through the sleeve through the rotation of the screw rod.

[0043] See also Figure 1 and Figure 2 As a specific embodiment of the layer-burning progressive combustion stove provided by the present invention, the grate 13 includes a plurality of grate bars 131 arranged in a grid shape. The cross section of the grate bar 131 is flat and the long axis of the cross section is arranged in the vertical direction. A single grate bar is used to cut the ash after the fuel is burned. This arrangement can reduce the support area of ​​a single grate bar 131, so that the grate bar 131 will exert a greater pressure on the local ash and slag, causing the ash to crack, similar to the principle of a blade cutting an object, so that the ash will not accumulate on the grate bar 131, but will directly fall from the ash-falling gap into the ash storage cavity below the furnace 11 after cracking. In addition, the biomass fuel on the grate 13 will also put pressure on the ash, causing the ash to be cut and cracked by the grate bar 131.

[0044] Specifically, a vertical through hole is provided at the center of the bottom wall of the furnace 11, and a plurality of grate bars 131 are arranged horizontally side by side in the through hole, and both ends are fixed to the inner wall of the through hole. The cross section of the grate bar 131 is a flat rectangle, and the long axis of the cross section is arranged in the vertical direction, the short axis direction of the cross section of the grate bar 131 is the thickness direction of the grate bar 131, and the spacing between two adjacent grate bars 131 is greater than the thickness of the grate bar 131.

[0045] See also Figure 1 and Figure 2 As a specific embodiment of the layer-burning progressive combustion stove provided by the present invention, the grate 13 also includes a baffle plate 132, which surrounds the multiple grate bars 131 and surrounds the multiple grate bars 131 to form a combustion chamber 133.

[0046] Specifically, the baffle plate 132 is a horizontal rectangle, and the cavity in the middle is a combustion chamber 133. A plurality of grate bars 131 are welded side by side on the lower side of the baffle plate 132, forming a grid-like grate 13 on the lower side of the combustion chamber 133, so that the biomass fuel can be contained in the combustion chamber 133 for combustion, making the combustion more concentrated.

[0047] See also Figure 1 and Figure 2 As a specific embodiment of the layer-burning progressive combustion stove provided by the present invention, a notch is provided on the side of the baffle plate 132 close to the feed end 21 to avoid the feed end 21 or the fuel delivered by the feed end 21. The notch avoids the feed end 21, so that the feed end 21 can be closer to the combustion chamber 133, and the fuel delivered by the feed end 21 can enter the combustion chamber 133 more accurately. The notch avoids the fuel delivered by the feed end 21, so that the fuel delivered by the feed end 21 can enter the combustion chamber 133 more accurately.

[0048] Specifically, the baffle plate 132 may be made of four side plates forming a horizontal rectangle, and the upper edge of the side plate close to the feeding end 21 is lower than the upper edges of the other three side plates, thereby forming a gap.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A layer-burning progressive combustion stove, It is characterized in that include: A furnace body, comprising a furnace, a furnace opening communicated with the furnace, and a grate located below the furnace; A material channel pipe is provided on the furnace body, and a material feeding end extends into the furnace, and is used to transport fuel to the grate; as well as A gasification cylinder is arranged in the furnace port, the gas inlet end of which extends into the furnace and is provided with a material blocking portion, the material blocking portion is arranged opposite to the material feeding end, and is used to block the fuel on the grate to block the material feeding end; The material blocking portion is arranged on a side of the gasification cylinder gas inlet end away from the material feeding end; the material blocking portion is an arc-shaped plate with a concave side facing the material feeding end; Two gathering baffles arranged at intervals are arranged in the furnace, and a material guide trough is formed between the two gathering baffles, one end of which is connected with the material feeding end and the other end of which faces the grate.

2. The layer-burning progressive combustion stove according to claim 1, It is characterized in that The grate is recessed on the bottom wall of the furnace.

3. The layer combustion progressive combustion stove according to any one of claims 1 to 2, It is characterized in that The layer-burning progressive combustion stove also includes a fuel tank, and the bottom of the fuel tank is connected to the feed end of the material channel pipe.

4. The layer-burning progressive combustion stove according to claim 3, It is characterized in that The bottom of the fuel tank is connected to the feed end of the feed channel pipe through an electric feed mechanism.

5. The layer combustion progressive combustion stove according to any one of claims 1 to 4, It is characterized in that The grate comprises a plurality of grate bars arranged in a grid shape, the cross section of the grate bars is flat and the long axis of the cross section is arranged in a vertical direction, and a single grate bar is used for cutting ash after fuel combustion.

6. The layer-burning progressive combustion stove according to claim 5, It is characterized in that The grate also includes a baffle plate, which surrounds the plurality of grate bars and forms a combustion chamber above the plurality of grate bars.

7. The layer-burning progressive combustion stove according to claim 6, It is characterized in that A notch is provided on one side of the baffle plate close to the material feeding end to avoid the material feeding end or the fuel transported by the material feeding end.

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