A furnace core split type biomass combustion stove

Abstract

The utility model provides a kind of stove core split type biomass combustion stove, including furnace body, the cavity is arranged in the furnace body, the grate and the stove core assembly located above grate are arranged in the cavity, the stove core assembly includes furnace cylinder and filter disc, the number of the furnace cylinder is at least three and is stacked distribution up and down, a plurality of air windows are arranged around distribution between adjacent furnace cylinder, filter disc close to bottom is overlapped in the furnace cylinder, the filter hole on the filter disc of low height is less than the filter hole on the filter disc of high height, in the utility model, the air window around distribution is arranged between stacked furnace cylinder, oxygen content in each furnace cylinder is sufficient after air cylinder enters stove core assembly through air window, greatly improve the efficiency of biomass particulate combustion, and the split type structure of the stove core assembly is convenient to replace, reduce use cost.

Description

Technical Field

[0001] This utility model relates to the field of biomass stove technology, specifically a biomass combustion stove with a split furnace core. Background Technology

[0002] Biomass stoves use biomass briquettes (chopped firewood, firewood, straw, corn cobs, various fruit shells, and various biomass pellets, etc.) as fuel. A blower supplies air to control the stove temperature and airflow, ensuring complete gasification and combustion of the fuel within the furnace. Biomass stoves provide cooking, heating, and water boiling functions.

[0003] Currently, the furnace core in a biomass combustion furnace is usually an integrated cylindrical structure. Biomass pellet fuel is ignited and burned inside the furnace core. The bottom of the furnace core is the main air inlet. Ash leakage holes are opened at the bottom of the furnace core, or a grate is set below the furnace core to facilitate the discharge of ash from the biomass pellet combustion. The flue pipes set on the outside of the furnace body discharge the flue gas generated by the combustion inside the furnace core.

[0004] However, the above-mentioned existing technologies still have shortcomings in use: 2. The furnace core usually has a certain height and is an integral structure. When it is partially damaged (cracked), it needs to be replaced as a whole, which increases the cost of use. When the fuel in the furnace core is burning, since the gas is mainly supplied from the bottom, there is a problem that the gas supply is insufficient, resulting in the biomass fuel not being fully burned, such as biomass particles with high moisture content; 3. The ash collection holes at the bottom of the furnace core are large, and incompletely burned biomass particles are easy to fall into the ash hopper, which cannot be completely burned, which not only causes waste but also increases the amount of pollution.

[0005] Therefore, this utility model provides a biomass combustion stove with a split furnace core. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a biomass combustion stove with a separate furnace core to solve the problems mentioned in the background technology. The furnace core assembly of this utility model has the advantages of low replacement cost, sufficient gas supply, and improved combustion efficiency.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a split-core biomass combustion stove, comprising a furnace body, wherein a cavity is provided inside the furnace body, a grate and a core assembly located above the grate are provided in the cavity, the core assembly includes a furnace cylinder and a filter disc, the number of furnace cylinders is at least three and they are stacked vertically, a number of air windows are arranged in a circular arrangement between adjacent furnace cylinders, and a filter disc near the bottom is attached inside the furnace cylinder, the filter holes on the lower filter disc are smaller than the filter holes on the higher filter disc.

[0008] Furthermore, an upper conical sleeve is fixedly installed at the top of the furnace cylinder, and a lower conical sleeve is fixedly installed at the bottom. The diameter of the large end of the upper conical sleeve is smaller than that of the large end of the lower conical sleeve and larger than that of the inner diameter of the furnace cylinder. A support ring located above the lower conical sleeve is fixedly sleeved inside the furnace cylinder, and a positioning ring that contacts the upper end face of the support ring is fixedly sleeved on the outer periphery of the filter disc.

[0009] Furthermore, the upper end face of the upper conical sleeve is fixedly connected with circumferentially evenly distributed insertion shafts, and the inner conical surface of the lower conical sleeve is provided with insertion holes that are adapted to the insertion shafts.

[0010] Furthermore, the upper end face of the upper conical sleeve is provided with circumferentially evenly distributed notches.

[0011] Furthermore, the grate is disc-shaped and its upper end face is fixedly connected with a limiting sleeve that is inserted into the lower conical sleeve.

[0012] Furthermore, the filter disc is conical with its smaller end facing downwards.

[0013] Furthermore, the outer wall of the furnace body is provided with inclined feeding pipes, the bottom end of the feeding pipes is opposite to the top opening of the furnace core assembly, and the top end of the feeding pipes is fastened with a cap.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, the furnace core assembly is composed of multiple stacked furnace cylinders. When one furnace cylinder is damaged, it can be replaced individually, which not only makes replacement convenient but also reduces the cost of use.

[0016] 2. In this utility model, air vents are arranged in a ring between the stacked furnace cylinders. After the air cylinders enter the furnace core assembly through the air vents, the oxygen content in each furnace cylinder is sufficient, which greatly improves the efficiency of biomass pellet combustion.

[0017] 3. In this utility model, the furnace core assembly includes filter discs located in each furnace cylinder, and the filter holes on the lower filter disc are smaller than those on the higher filter disc, thereby ensuring that the biomass particles are fully burned before falling into the ash hopper, which is more environmentally friendly and energy-saving. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a split-core biomass combustion stove according to the present invention;

[0019] Figure 2 This is a schematic diagram of the core assembly of a split-core biomass combustion stove according to the present invention;

[0020] Figure 3 for Figure 2 A diagram at the bottom;

[0021] Figure 4 for Figure 3 A diagram showing the aftermath of the explosion.

[0022] In the diagram: 1. Furnace body; 11. Cavity; 2. Grate; 21. Limiting sleeve; 4. Furnace core assembly; 41. Furnace cylinder; 411. Upper conical sleeve; 4111. Insert shaft; 4112. Notch; 412. Lower conical sleeve; 4121. Insertion hole; 413. Support ring; 42. Filter disc; 421. Positioning ring; 6. Feeding pipe; 7. Cover. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a biomass combustion stove with a split furnace core, including a furnace body 1, a cavity 11 inside the furnace body 1, a heat conduction port at the top of the furnace body 1, a pot ring at the top of the heat conduction port for supporting the pot body, the cavity 11 being a gas supply chamber, an air duct connected to the outer wall of the furnace body 1, the air duct communicating with the cavity 11, a grate 2 and a furnace core assembly 4 located above the grate 2 inside the cavity 11, the inner cavity of the furnace core assembly 4 being the location for placing and burning biomass particles, after gas enters the inner cavity 11 of the furnace body 1, the gas will fill the cavity, wherein, in use, the air duct is connected to an external blower through an air valve, and a removable ash hopper is installed below the grate 2.

[0025] In the technical solution, the furnace core assembly 4 includes a furnace cylinder 41. The number of furnace cylinders 41 is at least three and they are stacked one on top of the other. In this embodiment, the number of furnace cylinders 41 is three. The stacking arrangement facilitates the disassembly and assembly of the furnace core assembly 4. When one of the furnace cylinders 41 is damaged, it can be replaced individually.

[0026] Several air vents are arranged in a ring between adjacent furnace cylinders 41. The gas in the cavity 11 will enter the furnace cylinder 41 through the air vents, so that the stacked furnace cylinders 41 are full of oxygen, which can provide secondary combustion support for the dust and gasified products of incomplete combustion of biomass fuel, thereby improving combustion efficiency.

[0027] The furnace core assembly 4 includes a filter disc 42. A filter disc 42 is attached near the bottom of the furnace cylinder 41, with one filter disc 42 installed in each furnace cylinder 41. The filter disc 42 has evenly distributed filter holes, which are round holes with a diameter smaller than the biomass pellet size. For example, if the biomass pellet size is 10mm, the filter hole diameter is less than 10mm, such as 8mm, 6mm, or 4mm. The biomass pellets in the furnace cylinder 41 are burned by the corresponding filter disc 42. Incompletely burned pellets, as their volume decreases, pass through the filter holes and fall into the lower furnace cylinder 41. The filter holes on the lower filter disc 42 are smaller than those on the higher filter disc 42. Therefore, the incompletely burned pellets are blocked by the filter disc 42 with smaller filter holes and continue to burn in this furnace cylinder 41. In this way, the ash from the complete combustion of the biomass pellets passes through the grate 2 and falls into the ash hopper below.

[0028] In this embodiment, an upper conical sleeve 411 is fixedly installed at the top of the furnace cylinder 41, and a lower conical sleeve 412 is fixedly installed at the bottom. The diameter of the larger end of the upper conical sleeve 411 is smaller than that of the larger end of the lower conical sleeve 412 and larger than the inner diameter of the furnace cylinder 41. This arrangement facilitates the stacking and docking of two adjacent furnace cylinders 41. When two adjacent furnace cylinders 41 are stacked, an annular channel with an opening facing downwards is formed between them. The upper end face of the upper conical sleeve 411 has circumferentially evenly distributed notches 4112, which constitute the air vents mentioned above. The airflow in the cavity 11 enters the annular channel and then enters the space between the two adjacent furnace cylinders 41 through the notches 4112. This arrangement makes the airflow entering the furnace cylinder 41 more uniform.

[0029] The furnace cylinder 41 is fixedly fitted with a support ring 413 located above the lower conical sleeve 412. The outer periphery of the filter disc 42 is fixedly fitted with a positioning ring 421 that contacts the upper end face of the support ring 413. During assembly, the positioning ring 421 on the filter disc 42 is mounted on the support ring 413. This arrangement facilitates the disassembly and assembly of the filter disc 42. During use, the filter disc 42 can be added or removed as needed according to the combustion conditions of the biomass pellets. For example, when the biomass pellets used (e.g., with low humidity) are easy to burn, one layer of the furnace cylinder 41 and the filter disc 42 can be removed.

[0030] Furthermore, the upper end face of the upper conical sleeve 411 is fixedly connected with circumferentially evenly distributed insertion shafts 4111, and the inner conical surface of the lower conical sleeve 412 is provided with insertion holes 4121 that are adapted to the insertion shafts 4111. This arrangement allows adjacent furnace cylinders 41 to be in an insertion state after being stacked, thereby improving the stability of the stacked structure.

[0031] The filter disc 42 is conical with its small end facing down. This design increases the contact area between the filter disc 42 and the biomass pellets, thereby increasing the air intake through the filter disc 42 and making the biomass pellets easier to burn.

[0032] In this embodiment, the grate 2 is disc-shaped and its upper end face is fixedly connected with a limiting sleeve 21 that is inserted into the lower conical sleeve 412. When in use, the bottom of the lowest furnace cylinder 41 is inserted into the limiting sleeve 21, and the limiting sleeve 21 plays the role of limiting the furnace cylinder 41.

[0033] In this embodiment, the outer wall of the furnace body 1 is provided with inclined feeding pipes 6. The bottom end of the feeding pipe 6 is opposite to the top opening of the furnace core assembly 4. The feeding pipe 6 is the channel for conveying biomass pellets into the furnace core assembly 4. When in use, the exposed part of the feeding pipe 6 can be covered with heat insulation cotton. The top end of the feeding pipe 6 is fastened with a cap 7, which serves to prevent flue gas from being exposed.

[0034] An openable observation window is provided on the outside of the furnace body 1 near the top, with glass embedded in the window to facilitate observation of the combustion status at the top of the furnace core assembly 4.

[0035] Working principle: During operation, biomass pellets are fed into the furnace core assembly 4 through the feeding pipe 6. Then, the observation window is opened, and the biomass pellets in the uppermost furnace cylinder 41 are ignited by the igniter and combustion aid. The observation window is then closed, and air is simultaneously supplied to the cavity 11. Oxygen from the cavity 11 enters the furnace cylinder 41 through the notch 4112. With a sufficient supply of oxygen, the biomass pellets will burn completely. During combustion, some unburned pellets will pass through the corresponding filter plate 42 and fall into the next layer of furnace cylinder 41, where they will continue to burn. Finally, the ash produced by combustion falls into the ash hopper.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A split-core biomass combustion stove, comprising a stove body (1), a cavity (11) is arranged in the stove body (1), a grate (2) and a stove core assembly (4) above the grate (2) are arranged in the cavity (11), characterized in that, The furnace core assembly (4) includes a furnace cylinder (41) and a filter plate (42). The number of furnace cylinders (41) is at least three and they are stacked one on top of the other. Several air windows are arranged around the adjacent furnace cylinders (41). The filter plate (42) near the bottom is attached inside the furnace cylinder (41). The filter holes on the lower filter plate (42) are smaller than the filter holes on the higher filter plate (42).

2. The split core biomass burning stove as claimed in claim 1, wherein: The furnace cylinder (41) is fixedly provided with an upper conical sleeve (411) at the top and a lower conical sleeve (412) at the bottom. The diameter of the large end of the upper conical sleeve (411) is smaller than that of the large end of the lower conical sleeve (412) and larger than that of the inner diameter of the furnace cylinder (41). A support ring (413) located above the lower conical sleeve (412) is fixedly sleeved inside the furnace cylinder (41). A positioning ring (421) that contacts the upper end face of the support ring (413) is fixedly sleeved on the outer periphery of the filter disc (42).

3. The split core biomass burning stove as claimed in claim 2, wherein: The upper conical sleeve (411) is fixedly connected to the upper end face with circumferentially evenly distributed insertion shafts (4111), and the inner conical surface of the lower conical sleeve (412) is provided with insertion holes (4121) that are adapted to the insertion shafts (4111).

4. The split core biomass burning stove as claimed in claim 2, wherein: The upper end face of the upper conical sleeve (411) is provided with circumferentially evenly distributed notches (4112).

5. The split core biomass burning stove as claimed in claim 2, wherein: The grate (2) is disc-shaped and its upper end face is fixedly connected with a limiting sleeve (21) that is inserted into the lower conical sleeve (412).

6. The split core biomass burning stove as claimed in claim 1, wherein: The filter disc (42) is conical with its small end facing down.

7. The split core biomass burning stove as claimed in claim 1, wherein: The outer wall of the furnace body (1) is provided with inclined feeding pipes (6), the bottom end of the feeding pipes (6) is opposite to the top opening of the furnace core assembly (4), and the top end of the feeding pipes (6) is fastened with a cap (7).

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