A kind of honeycomb-like bundled straw biomass fuel with ventilation hole
By creating ventilation holes in the baled straw biomass fuel, the problems of slow and incomplete combustion were solved, achieving efficient combustion and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HARBIN MENGBIAO ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-31
AI Technical Summary
The existing baled straw biomass fuel has problems such as slow and incomplete combustion speed when burned in the furnace due to its high moisture content and density, resulting in boilers that are large, complex in structure and expensive.
A honeycomb-like baled straw biomass fuel with ventilation holes is designed. By opening multiple through ventilation holes in the baled structure, the oxygen contact area is increased, promoting moisture evaporation and combustion efficiency.
It improves combustion efficiency, reduces boiler size and cost, avoids charcoal formation, and achieves complete combustion of straw.
Smart Images
Figure CN224578233U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of baled straw biomass fuel, and in particular to a honeycomb-like baled straw biomass fuel with ventilation holes. This fuel can be used in direct-fired boilers and hot air furnaces made from baled straw biomass fuel. Background Technology
[0002] Northeast my country boasts abundant straw reserves, convenient collection and baling conditions, and low-cost direct use as fuel. Furthermore, the pollutant emissions from straw combustion are significantly lower than those from coal. Direct combustion of biomass baled straw in residential heating, grain drying, and other fields makes it an excellent alternative to coal. In recent years, straw baling combustion technology and equipment have developed rapidly, including baled direct-fired steam boilers, hot water boilers, and baled direct-fired hot air furnaces, which are widely used in urban heating, industrial gas supply, and grain drying, playing a crucial role in energy conservation and emission reduction.
[0003] According to the national standard GB / T44906—2024, the total moisture content of biomass fuel fed into the furnace should be controlled below 35%, and the ash content on a dry basis should not exceed 15%. This is because when the moisture content of baled straw exceeds 30% and the ash content on a dry basis exceeds 15%, incomplete combustion will occur when the biomass fuel is burned in the furnace, affecting the normal use of the stove. To ensure the thermal effect of direct combustion of baled straw, it is necessary to increase the boiler volume and furnace volume, resulting in increased boiler costs.
[0004] Straw baled fuel is a compacted, large-lump biomass fuel. Due to its large volume, high density, and high moisture content, it requires a sufficiently large combustion chamber and a sufficient oxygen environment to meet the demands of combustion and heat release. Because of the high density of baled straw, the combustion speed is slow, and heat release is not rapid. Current boilers and hot air furnaces using whole-baled straw combustion for heating have long suffered from unresolved technical problems: slow combustion speed and incomplete combustion when burning whole baled straw.
[0005] To fully utilize the thermal effect of baled straw as fuel and ensure rapid combustion of the entire bale, it is necessary to increase the boiler size and furnace volume; alternatively, a baling and breaking device should be added inside the furnace, along with increased ventilation and oxygen supply to guarantee stable combustion. These methods do not fundamentally solve the problem, resulting in boilers and hot air furnaces for heating from baled straw being bulky, structurally complex, and costly to manufacture.
[0006] In addition, due to the uncertainty of climate, the amount of straw collected and stored that meets the combustion standards is very uncertain. This makes it difficult for the moisture content and other indicators of the straw to meet the national standards when it is put into the stove as fuel.
[0007] To fundamentally solve these problems, the applicant drew inspiration from the shape of honeycomb briquettes (cylindrical coal blocks processed by molds) with multiple uniformly distributed through holes on their surface, which resemble honeycomb and have high combustion efficiency, and proposed a honeycomb-like baled straw biomass fuel with ventilation holes. Utility Model Content
[0008] In view of the problem that the biomass fuel fed into the furnace has too high a moisture content and is difficult to burn completely when it is burning in the furnace, the purpose of this utility model is to provide a honeycomb-shaped baled straw biomass fuel with ventilation holes.
[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0010] A honeycomb-like baled straw biomass fuel with ventilation holes, wherein the baled straw biomass fuel unit is a baled structure 1, wherein multiple ventilation holes 2 in the same direction and through or multiple ventilation holes 2 in different directions and through are opened or processed on the baled structure 1, so that the baled structure 1 forms a honeycomb-like baled straw biomass fuel.
[0011] The aforementioned honeycomb-shaped baled straw biomass fuel with ventilation holes, wherein the baling structure 1 is a cuboid or cube structure, and its baling cross-section is a square or rectangle.
[0012] The aforementioned honeycomb-shaped baled straw biomass fuel with ventilation holes includes a baled structure 1 that is cylindrical with a circular baling cross-section.
[0013] The aforementioned honeycomb-shaped baled straw biomass fuel with ventilation holes includes a baled structure 1 that is a columnar structure with a regular polygonal baling cross-section.
[0014] The aforementioned honeycomb-like baled straw biomass fuel with ventilation holes has multiple ventilation holes 2 arranged in the same direction, and the cross-section of the ventilation holes is circular, elliptical or polygonal.
[0015] In the aforementioned honeycomb-like baled straw biomass fuel with ventilation holes, when multiple ventilation holes 2 are oriented in the same direction, all multiple ventilation holes 2 are perpendicular to the baling cross section of the baling structure 1.
[0016] In the aforementioned honeycomb-like baled straw biomass fuel with ventilation holes, when multiple ventilation holes 2 are oriented in the same direction, all multiple ventilation holes 2 are parallel to the baling cross section of the baling structure 1.
[0017] Because this utility model employs the aforementioned technology, it has the following positive effects compared to existing technologies:
[0018] (1) In this utility model, by opening ventilation holes on the bundled structure, the contact area between straw and oxygen can be effectively increased. When the bundled structure enters the furnace, the moisture on the surface of the bundled structure can be quickly carried away by the heat in the furnace, reaching the combustion point of the bundled structure. At the same time, it accelerates the evaporation of moisture inside the bundled structure, so that the bundled structure can burn fully in the furnace, reducing the boiler volume and lowering the boiler cost.
[0019] (2) In this utility model, by opening multiple rows of ventilation holes, both the inner and outer layers can fully contact the oxygen in the furnace, preventing the bundled structure from forming carbon blocks in the high temperature and oxygen-deficient state, preventing the occurrence of pyrolysis reaction, improving the combustion efficiency of the bundled structure, and ensuring that the bundled structure can burn fully in the furnace. Attached Figure Description
[0020] Figure 1 This utility model illustrates the perforation process for square-baled straw biomass fuel. Figure 1 .
[0021] Figure 2 This utility model illustrates the perforation process for square-baled straw biomass fuel. Figure 2 .
[0022] Figure 3 This utility model illustrates the perforation process for square-baled straw biomass fuel. Figure 3 .
[0023] Figure 4 This utility model illustrates the perforation process for cylindrical baled straw biomass fuel. Figure 1 .
[0024] Figure 5 This utility model illustrates the perforation process for cylindrical baled straw biomass fuel. Figure 2 .
[0025] Figure 6 This utility model illustrates the perforation process for cylindrical baled straw biomass fuel. Figure 3 .
[0026] In the attached diagram: 1. Bundle-like structure; 2. Ventilation hole. Detailed Implementation
[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.
[0028] Please refer to Figures 1 to 6As shown, a honeycomb-like baled straw biomass fuel with ventilation holes is presented. The baled straw biomass fuel unit is a baled structure 1, wherein multiple ventilation holes 2 in the same direction and through or multiple ventilation holes 2 in different directions and through are opened or processed on the baled structure 1, so that the baled structure 1 forms a honeycomb-like baled straw biomass fuel.
[0029] The aforementioned honeycomb-shaped baled straw biomass fuel with ventilation holes, wherein the baling structure 1 is a cuboid or cube structure, and its baling cross-section is a square or rectangle.
[0030] The aforementioned honeycomb-shaped baled straw biomass fuel with ventilation holes includes a baled structure 1 that is cylindrical with a circular baling cross-section.
[0031] The aforementioned honeycomb-shaped baled straw biomass fuel with ventilation holes includes a baled structure 1 that is a columnar structure with a baled cross-section that is a regular polygon, such as a regular pentagon, regular hexagon, or regular octagon.
[0032] The aforementioned honeycomb-like baled straw biomass fuel with ventilation holes has multiple ventilation holes 2 arranged in an array in the same direction. The ventilation hole shape can be circular, elliptical, triangular, or polygonal.
[0033] In the aforementioned honeycomb-like baled straw biomass fuel with ventilation holes, when multiple ventilation holes 2 are oriented in the same direction, all multiple ventilation holes 2 are perpendicular to the baling cross section of the baling structure 1.
[0034] In the aforementioned honeycomb-like baled straw biomass fuel with ventilation holes, when multiple ventilation holes 2 are oriented in the same direction, all multiple ventilation holes 2 are parallel to the baling cross section of the baling structure 1.
[0035] The aforementioned honeycomb-like baled straw biomass fuel with ventilation holes, wherein the baled structure 1 after being baled by a straw baler has multiple ventilation holes 2 formed by a punching device. The punching device uses a motor to drive multiple rows of steel needles through the baled structure 1 to open multiple rows of ventilation holes 2 that are connected vertically or horizontally.
[0036] The aforementioned honeycomb-like baled straw biomass fuel with ventilation holes can also have multiple ventilation holes 2 on the baled structure 1 generated during the baling process of the straw baler. For example, multiple long rod-shaped structures can be added during the straw baling process, and then the multiple long rod-shaped structures can be removed after the straw baling is completed to achieve the pre-reserved holes.
[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.
[0038] Based on the above, this utility model also has the following embodiments:
[0039] In a further embodiment of this utility model, by providing ventilation holes 2 on the bundled structure 1, the contact area between the straw 1 and oxygen can be effectively increased. When the bundled structure 1 enters the stove, the moisture on the surface of the bundled structure 1 can be quickly carried away by the heat in the stove, reaching the combustion point of the bundled structure 1. At the same time, it accelerates the evaporation of the moisture inside the bundled structure 1, so that the bundled structure 1 can burn fully in the stove.
[0040] In a further embodiment of this utility model, the bundled structure 1 with ventilation holes 2 has a combustion efficiency that is about 30% higher than that of baled straw of the same weight without ventilation holes 2.
[0041] In a further embodiment of this utility model, the bundled structure 1 without ventilation holes 2 needs to be burned layer by layer in the furnace from the outside to the inside. When the straw fuel is in a dry state, the outer layer has a higher combustion efficiency and the inner layer can also quickly come into contact with oxygen in the furnace when it reaches the combustion temperature, so as to achieve efficient and complete combustion of the bundled structure 1.
[0042] In a further embodiment of this utility model, the ignition temperature range of straw is generally between 200 degrees Celsius and 300 degrees Celsius. Straw without ventilation holes 2, when its moisture content is too high, will severely affect the combustion efficiency. Since the bundled structure 1 needs to burn layer by layer in the furnace from the outside in, the high moisture content of the straw results in low combustion efficiency. Furthermore, the inner layers of straw, being at high temperatures for extended periods and unable to contact oxygen in the furnace, will undergo pyrolysis at high temperatures, forming charcoal lumps. These charcoal lumps with high moisture content are even more difficult to burn completely in the furnace, leading to incomplete combustion of the bundled structure 1.
[0043] In a further embodiment of this utility model, the bundled structure 1 of this utility model, by opening multiple rows of honeycomb-like ventilation holes 2, allows both its inner and outer layers to fully contact the oxygen in the furnace, preventing the bundled structure 1 from forming carbon blocks under high temperature and oxygen deficiency conditions, thus preventing the occurrence of pyrolysis reaction, improving the combustion efficiency of the bundled structure 1, and ensuring that the bundled structure 1 can burn fully in the furnace.
[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A honeycomb-like baled straw biomass fuel with ventilation holes, wherein the baled straw biomass fuel has a baled structure (1), characterized in that, Multiple ventilation holes (2) with the same direction and through each other or multiple ventilation holes (2) with different directions and through each other are opened or processed on the bundled structure (1) so that the bundled structure (1) forms a honeycomb-like baled straw biomass fuel.
2. The honeycomb-like baled straw biomass fuel having ventilation holes according to claim 1, characterized in that, The bundled structure (1) is a cuboid or cube structure, and its bundled cross section is a square or rectangle.
3. The honeycomb-like baled straw biomass fuel having ventilation holes according to claim 1, characterized in that, The bundled structure (1) is a cylindrical structure with a circular cross section.
4. The honeycomb-like baled straw biomass fuel having ventilation holes according to claim 1, characterized in that, The bundled structure (1) is a columnar structure, and its bundled cross section is polygonal.
5. The honeycomb-like baled straw biomass fuel having ventilation holes according to claim 1, characterized in that, Multiple ventilation holes (2) are arranged in an array in the same direction, and the cross-section of the ventilation holes is circular, elliptical or polygonal.
6. The honeycomb-like baled straw biomass fuel having ventilation holes according to any one of claims 1 to 5, characterized in that, When multiple ventilation holes (2) are in the same direction, all ventilation holes (2) are perpendicular to the bundling section of the bundled structure (1).
7. The honeycomb-like baled straw biomass fuel having ventilation holes according to any one of claims 1 to 5, characterized in that, When multiple ventilation holes (2) are in the same direction, all ventilation holes (2) are parallel to the bundling section of the bundled structure (1).