Biomass Burning Furnace

Abstract

The present invention provides a biomass combustion stove, which relates to the technical field of environmentally friendly stoves, including a stove body, a feed tube, a lower air guide pipe and a flue; a hollow furnace is provided inside the stove body and an ash storage box is provided at the lower part, and a stove cover is provided above the stove body; the feed tube passes through the side wall of the stove body and extends into the furnace; the lower air guide pipe extends downward into the ash storage box, and the lower air guide pipe is located in the furnace wall of the stove body; the flue is connected with the stove cover. The biomass combustion stove provided by the present invention uses the lower air guide pipe to guide the combustible gas of the feed tube close to the furnace to the ash storage box at the bottom of the furnace, and then re-enters the furnace from the bottom of the furnace to burn, thereby achieving effective guidance of the combustible gas, facilitating subsequent full utilization of the combustible gas, avoiding the problem of combustible gas escaping from the inlet end of the feed tube, ensuring the stability of the biomass fuel in the feed tube, and achieving full utilization of the small amount of combustible gas generated at the lower end of the feed tube, thereby improving energy utilization.

Description

Technical Field

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

[0002] With the strengthening of environmental protection efforts, in order to reduce the adverse impact on the environment, biomass combustion furnaces have been widely used. In actual use, biomass fuel is fed into the furnace of the furnace body through a feeding tube for combustion and exothermic reaction.

[0003] When using a biomass combustion furnace for heating, since the lower end of the feed barrel extends into the lower part of the furnace of the furnace body, it is affected by the heat generated by the incomplete combustion of the biomass fuel in the furnace, and the biomass fuel at the lower end of the feed barrel will also produce a small amount of combustible gas. This part of the gas is difficult to enter the furnace directly from the feed barrel. In severe cases, the gas may escape from the inlet end of the feed barrel, which greatly affects the normal combustion and also causes a certain impact on the personal safety of the operator. Summary of the invention

[0004] The object of the present invention is to provide a biomass combustion furnace to solve the technical problems in the prior art of insufficient utilization of combustible gas generated at the lower end of the feeding barrel of the biomass combustion furnace and potential safety hazards caused by escaping to the inlet end of the feeding barrel.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a biomass combustion furnace, including a furnace body, a feeding barrel, a lower air duct and a flue; a hollow furnace chamber is provided inside the furnace body and an ash storage box is provided at the lower part, and a furnace cover is provided above the furnace body; the feeding barrel passes through the side wall of the furnace body and extends into the furnace chamber; the lower air duct is connected with the side wall of the feeding barrel and extends downward into the ash storage box, and the lower air duct is located in the furnace wall of the furnace body; the flue is arranged on the side of the furnace body and is connected with the furnace cover.

[0006] As a further optimization, a lower guide hood extending toward the center of the lower opening of the furnace is provided at the lower end of the lower air guide pipe.

[0007] As a further optimization, a lower guide plate inclined from top to bottom toward the axis of the furnace is also provided at one end of the lower guide cover close to the lower air guide pipe.

[0008] As a further optimization, the lower air guide pipe is connected to the feed barrel through a lower air collecting pipe, and the cross-sectional area of ​​one end of the lower air collecting pipe connected to the feed barrel is larger than the cross-sectional area of ​​one end of the lower air collecting pipe connected to the lower air guide pipe.

[0009] As a further optimization, the flue is arranged on the side of the furnace body away from the feeding cylinder. The biomass combustion furnace also includes an upper air duct connected to the side wall of the feeding cylinder and extending into the furnace cover. The upper air duct is located in the furnace wall of the furnace body.

[0010] As a further optimization, an upper guide hood extending toward the center of the upper opening of the furnace is provided at the upper end of the upper air guide pipe.

[0011] As a further optimization, the inlet end of the feed barrel is provided with a cover plate hinged to the feed barrel, and the side wall of the upper guide cover is penetrated by a sealing plate which is slidably connected to the upper guide cover and is used to seal the upper air duct.

[0012] As a further optimization, it is characterized in that an upper air collecting pipe is provided between the upper air duct and the feeding barrel, and the cross-sectional area of ​​one end of the upper air collecting pipe connected to the feeding barrel is larger than the cross-sectional area of ​​one end of the upper air collecting pipe connected to the upper air duct.

[0013] As a further optimization, a guide rail for sliding connection with the sealing plate is arranged on the top of the furnace body, and the guide rail is located in the upper guide cover.

[0014] As a further optimization, the guide rail is arranged along a direction perpendicular to the side wall of the guide cover.

[0015] The beneficial effect of the biomass combustion furnace provided by the present invention is that the biomass combustion furnace provided by the present invention utilizes the lower air guide pipe to guide the combustible gas of the feeding barrel near the furnace to the ash storage box at the bottom of the furnace, and then re-enters the furnace from the bottom of the furnace for combustion, thereby realizing effective guidance of the combustible gas, facilitating its subsequent full utilization, avoiding the problem of combustible gas escaping from the inlet end of the feeding barrel, ensuring the stability of the biomass fuel in the feeding barrel, and realizing full utilization of the small amount of combustible gas generated at the lower end of the feeding barrel, thereby improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic diagram of the structure of a biomass combustion furnace provided in Embodiment 1 of the present invention;

[0018] Figure 2 A schematic diagram of the structure of a biomass combustion furnace provided in the second embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the main structure of the biomass combustion furnace provided in the third embodiment of the present invention;

[0020] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure of Ⅰ is shown;

[0021] Figure 5 A partial cross-sectional structural schematic diagram of a biomass combustion furnace provided in Embodiment 4 of the present invention;

[0022] In the figure: 100, furnace body; 110, furnace chamber; 120, ash storage box; 130, furnace cover; 200, feed barrel; 210, cover plate; 300, lower air duct; 310, lower air collecting pipe; 320, lower guide cover; 321, lower guide plate; 400, flue; 500, upper air duct; 510, upper guide cover; 520, sealing plate; 530, upper air collecting pipe; 540, guide rail. 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 Figures 1 to 5 , the biomass combustion furnace provided by the present invention is now described. The biomass combustion furnace includes a furnace body 100, a feed barrel 200, a lower air duct 300 and a flue 400; a hollow furnace 110 is provided inside the furnace body 100 and an ash storage box 120 is provided at the lower part, and a furnace cover 130 is provided above the furnace body 100; the feed barrel 200 penetrates the side wall of the furnace body 100 and extends into the furnace 110; the lower air duct 300 is connected to the side wall of the feed barrel 200 and extends downward into the ash storage box 120, and the lower air duct 300 is located in the furnace wall of the furnace body 100; the flue 400 is arranged on the side of the furnace body 100 and is connected to the furnace cover 130. It should be noted that when an element is referred to as being "arranged on" another element, it can be directly on the other element or indirectly on the other element. The orientation or position relationship indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings and is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] A biomass combustion furnace is a boiler that uses biomass energy as fuel, and is divided into a biomass steam boiler, a biomass hot water boiler, a biomass hot air furnace, and a biomass thermal oil furnace. The feed tube 200 and the lower air guide pipe 300 provided in this embodiment are combined in a form suitable for a variety of biomass combustion furnaces. The biomass combustion furnace in this embodiment is a vertical biomass combustion furnace.

[0026] In this embodiment, the lower end of the feed barrel 200 extends into the furnace 110 of the furnace body 100 for feeding. Affected by the high temperature generated by the incomplete combustion of the biomass fuel in the furnace 110, part of the biomass fuel at the lower end of the feed barrel 200 will also undergo a small amount of incomplete combustion, generating a small amount of combustible gas. If this part of the gas flows toward the inlet end of the feed barrel 200 and escapes from the inlet end of the feed barrel 200, it will not only cause a waste of combustible gas, but also pollute the surrounding environment, and has a greater safety hazard, which is not conducive to the normal use of the biomass combustion furnace. The flue 400 can be arranged on the same side of the feed barrel 200, or it can be arranged on the opposite side of the feed barrel 200, without affecting the lower air guide pipe 300's function of leading out the combustible gas. The setting of the lower air guide pipe 300 can effectively guide the gas in the feeding barrel 200 to the ash storage box 120, and then the combustible gas re-enters the furnace 110 from the bottom of the furnace 110 for combustion, thereby fully utilizing the combustible gas and effectively improving the utilization rate of biomass fuel.

[0027] Compared with the prior art, the biomass combustion furnace provided by the present invention uses the lower air guide pipe 300 to guide the combustible gas of the feeding barrel 200 close to the furnace 110 to the ash storage box 120 at the bottom of the furnace 110, and then the combustible gas re-enters the furnace 110 from the bottom of the furnace 110 for combustion, thereby achieving effective guidance of the combustible gas, facilitating subsequent full utilization of the combustible gas, and avoiding the problem of combustible gas escaping from the inlet end of the feeding barrel 200, thereby ensuring the stability of the biomass fuel in the feeding barrel 200 and achieving full utilization of the small amount of combustible gas generated at the lower end of the feeding barrel 200, thereby improving energy utilization.

[0028] See also Figure 2 As a specific embodiment of the biomass combustion furnace provided by the present invention, the lower end of the lower air guide pipe 300 is provided with a lower guide cover 320 extending toward the center of the lower opening of the furnace 110. In this embodiment, the lower air guide pipe 300 is used to convey the combustible gas in the feeding barrel 200 downward to the ash storage box 120, and the combustible gas in the ash storage box 120 enters the furnace 110 from the lower opening of the furnace 110 for effective combustion. The lower guide cover 320 provided at the outlet end of the lower air guide pipe 300, that is, the lower end, can guide the combustible gas to the lower opening of the furnace 110, and then enter the furnace 110 for full combustion, so as to realize the effect of smoothly conveying the combustible gas from the lower air guide pipe 300 to the lower opening of the furnace 110, thereby improving the utilization rate of the combustible gas.

[0029] See also Figure 2As a specific embodiment of the biomass combustion furnace provided by the present invention, a lower guide cover 320 is provided with a lower guide plate 321 which is inclined from top to bottom toward the axis of the furnace 110 at one end close to the lower air guide pipe 300. The lower guide plate 321 can guide the combustible gas generated by incomplete combustion in the lower air guide pipe 300 more smoothly, avoid the gas directly impacting the bottom surface of the lower guide cover 320, and affect the smooth transportation of the airflow, so that the airflow from above flows to the lower opening of the furnace 110 under the guidance of the lower guide plate 321, so as to achieve the effect of effectively transporting the combustible gas into the furnace 110 and fully burning it in the furnace 110.

[0030] See also Figure 2 As a specific embodiment of the biomass combustion furnace provided by the present invention, the lower air guide pipe 300 is connected to the feed barrel 200 through the lower air collecting pipe 310, and the cross-sectional area of ​​the end of the lower air collecting pipe 310 connected to the feed barrel 200 is larger than the cross-sectional area of ​​the end of the lower air collecting pipe 310 connected to the lower air guide pipe 300. The setting of the lower air collecting pipe 310 can effectively collect and gather the combustible gas generated in the feed barrel 200, and then uniformly guide it to the lower air guide pipe 300, which plays a role in centralized collection and facilitates the sufficient gathering and transportation of the combustible gas. The lower air collecting pipe 310 can be set to a hollow truncated cone or a polygonal prism, and the end with a larger cross-sectional area is connected to the side wall of the feed barrel 200, and the other end of the lower air collecting pipe 310 is connected to the upper end of the air guide pipe, so as to realize the gathering and collection of the combustible gas in the feed barrel 200 and ensure a good collection effect. When the gas in the lower air duct 300 is burned in time and the gas pressure is low, the combustible gas in the feeding barrel 200 will also flow downward due to the higher gas pressure relative to the lower end of the lower air duct 300, thereby achieving smooth discharge of the combustible gas from the lower outlet of the lower air duct 300.

[0031] Please also read Figure 3 to Figure 4As a specific embodiment of the biomass combustion furnace provided by the present invention, the flue 400 is arranged on a side of the furnace body 100 away from the feed barrel 200. The biomass combustion furnace also includes an upper air guide pipe 500 connected to the side wall of the feed barrel 200 and extending into the furnace cover 130. The upper air guide pipe 500 is located in the furnace wall of the furnace body 100. In this embodiment, the feed barrel 200 and the flue 400 are respectively arranged on opposite sides of the furnace body 100. At this time, in order to achieve the effect of quickly leading out the combustible gas in the feed barrel 200, the upper air guide pipe 500 and the lower air guide pipe 300 can be used in combination, which is convenient for more quickly achieving the leading out of the combustible gas and avoiding the problem that the combustible gas in the feed barrel 200 escapes from the inlet end of the feed barrel 200 during the feeding process. In this embodiment, the upper air duct 500 guides the combustible gas in the feeding barrel 200 upward to the upper opening of the furnace 110 for full combustion, and the lower air duct 300 guides the combustible gas in the feeding barrel 200 downward to the lower opening of the furnace 110 for full combustion, and then the burned exhaust gas smoothly enters the flue 400 on the other side, realizing the linear and smooth delivery of the airflow, thereby improving the utilization rate of the combustible gas.

[0032] Please also read Figure 3 to Figure 4 As a specific embodiment of the biomass combustion furnace provided by the present invention, an upper guide cover 510 extending toward the center of the upper opening of the furnace 110 is provided at the upper end of the upper air guide pipe 500. In this embodiment, an upper guide cover 510 for guiding the airflow of the combustible gas is also provided at the upper opening of the upper air guide pipe 500, so as to facilitate the effective transmission of the combustible gas to the upper opening of the furnace 110, so that the combustible gas can be fully burned at the upper opening of the furnace 110 and then smoothly discharged through the flue 400, thereby improving the smoothness of the airflow and avoiding the escape and waste of the combustible gas caused by the combustible gas not being guided in the furnace cover 130.

[0033] Please also read Figure 3 to Figure 4As a specific embodiment of the biomass combustion furnace provided by the present invention, the inlet end of the feed barrel 200 is provided with a cover plate 210 hinged to the feed barrel 200, and the side wall of the upper guide cover 510 is penetrated with a sealing plate 520 that is slidably connected to the upper guide cover 510 and is used to block the upper air guide pipe 500. The cover plate 210 is provided to seal the feed barrel 200. In the non-feeding stage, the cover plate 210 can ensure effective isolation from the external environment to prevent the combustible gas from escaping from the inlet end of the feed barrel 200 to the outside and causing adverse effects on the external environment. When the cover plate 210 is closed, the combustible gas in the feed barrel 200 will not escape from the cover plate 210. At this time, the sealing plate 520 can be slid to the position to close the upper air duct 500. When it is necessary to add material, the cover plate 210 is opened. At this time, in order to prevent the combustible gas from escaping from the inlet end of the feed barrel 200, it is necessary to realize the simultaneous connection of the upper air duct 500 and the lower air duct 300, so that the upper air duct 500 and the lower air duct 300 can effectively guide the combustible gas at the outlet of the feed barrel 200 to the upper mouth of the furnace 110 and the bottom center of the furnace 110 respectively, so as to realize the full combustion of the combustible gas.

[0034] Please also read Figure 3 to Figure 4 As a specific embodiment of the biomass combustion furnace provided by the present invention, an upper gas collecting pipe 530 is further provided between the upper gas guide pipe 500 and the feed barrel 200, and the cross-sectional area of ​​one end of the upper gas collecting pipe 530 connected to the feed barrel 200 is larger than the cross-sectional area of ​​one end of the upper gas collecting pipe 530 connected to the upper gas guide pipe 500. The setting of the upper gas collecting pipe 530 can effectively collect the combustible gas in the feed barrel 200 and guide it to the upper gas guide pipe 500, so as to avoid the combustible gas being affected by the dead angle at the inlet of the lower end of the upper gas guide pipe 500, and having difficulty in entering the upper gas guide pipe 500. The lower port of the upper gas collecting pipe 530 adopts a larger cross-section to collect and gather the combustible gas below, so as to effectively guide the combustible gas.

[0035] Please also read Figure 3 to Figure 4 As a specific embodiment of the biomass combustion furnace provided by the present invention, a guide rail 540 for sliding connection with the sealing plate 520 is arranged on the top of the furnace body 100, and the guide rail 540 is located in the upper guide cover 510. The guide rail 540 is arranged in a direction perpendicular to the side wall of the guide cover. The track arranged on the furnace body 100 can provide an effective limit for the sliding of the sealing plate 520, avoiding the position dislocation of the sealing plate 520 during the sliding process, resulting in the problem of poor sealing or incomplete opening of the upper air duct 500. In this embodiment, the guide rail 540 is in a form perpendicular to the side wall of the upper guide cover 510, and is arranged to penetrate the side wall of the upper guide cover 510, which can realize the rapid blocking and opening of the upper air duct 500, and has the advantages of flexible and smooth operation.

[0036] 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 biomass combustion furnace, characterized in that: include: A furnace body (100) is provided with a hollow furnace chamber (110) inside and an ash storage box (120) at the bottom, and a furnace cover (130) is provided above the furnace body (100); A feeding cylinder (200) passes through a side wall of the furnace body (100) and extends into the furnace chamber (110); a lower air guide pipe (300) connected to a side wall of the feeding cylinder (200) and extending downward into the ash storage box (120); the lower air guide pipe (300) is located inside a furnace wall of the furnace body (100); A flue (400) is arranged on the side of the furnace body (100) and is in communication with the furnace cover (130); A lower guide cover (320) extending toward the center of the lower opening of the furnace (110) is provided at the lower end of the lower air guide pipe (300); The lower guide cover (320) is also provided at one end close to the lower air guide pipe (300) with a lower guide plate (321) inclined from top to bottom toward the axis of the furnace (110); The flue (400) is arranged on a side of the furnace body (100) away from the feeding cylinder (200), and the biomass combustion furnace further comprises an upper air guide pipe (500) connected to a side wall of the feeding cylinder (200) and extending into the furnace cover (130), and the upper air guide pipe (500) is located in the furnace wall of the furnace body (100); An upper guide cover (510) extending toward the center of the upper opening of the furnace (110) is provided at the upper end of the upper air guide pipe (500); The inlet end of the feeding barrel (200) is provided with a cover plate (210) hinged to the feeding barrel (200), and the side wall of the upper guide cover (510) is penetrated by a sealing plate (520) which is slidably connected to the upper guide cover (510) and is used to seal the upper air guide pipe (500); An upper air collecting pipe (530) is further provided between the upper air guide pipe (500) and the feed barrel (200), and the cross-sectional area of ​​one end of the upper air collecting pipe (530) connected to the feed barrel (200) is larger than the cross-sectional area of ​​one end of the upper air collecting pipe (530) connected to the upper air guide pipe (500).

2. The biomass combustion furnace according to claim 1, characterized in that: The lower air guide pipe (300) is connected to the feed barrel (200) via a lower air collecting pipe (310), and the cross-sectional area of ​​one end of the lower air collecting pipe (310) connected to the feed barrel (200) is larger than the cross-sectional area of ​​one end of the lower air collecting pipe (310) connected to the lower air guide pipe (300).

3. The biomass combustion furnace according to claim 1, characterized in that: A guide rail (540) for slidingly connecting with the sealing plate (520) is provided on the top of the furnace body (100); the guide rail (540) is located inside the upper guide cover (510).

4. The biomass combustion furnace according to claim 3, characterized in that: The guide rail (540) is arranged in a direction perpendicular to the side wall of the guide cover (510).

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