Fuel gasification furnace
The fuel gasifier with a multi-layer combustion chamber structure realizes multiple combustion of fuel and cascade utilization of heat, which solves the problem of incomplete combustion in traditional fuel gasifiers, improves energy utilization efficiency and reduces pollution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 范伟政
- Filing Date
- 2025-05-13
- Publication Date
- 2026-05-08
AI Technical Summary
Traditional fuel gasification furnaces suffer from incomplete combustion, resulting in dense smoke that pollutes the environment and affects users' health, and they also have low energy efficiency.
It adopts a multi-layer combustion chamber structure, including a first combustion chamber, a second combustion chamber, a third combustion chamber and a fourth combustion chamber. Through multiple combustion processes, the airflow path is optimized to ensure complete combustion of fuel and cascade utilization of heat.
It achieves efficient and complete combustion, reduces smoke emissions, improves energy utilization, and reduces cleanliness burden and health risks, while saving fuel consumption.
Smart Images
Figure CN224215319U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fuel stoves, and in particular to a fuel gasification stove. Background Technology
[0002] In traditional combustion methods, especially in rural kitchens and outdoor camping settings, fuel gasification stoves used for burning fuel typically employ conventional direct-fired stove structures, which often have numerous drawbacks. For example, incomplete combustion leads to the production of large amounts of dense smoke, which not only pollutes the environment but also leaves walls covered in soot in rural kitchens, increasing the cleaning burden. In outdoor camping, ordinary campfires produce thick smoke that makes it difficult to open one's eyes, affecting the camping experience and potentially triggering forest fires, posing a safety hazard. Furthermore, the dense smoke can harm the health of users.
[0003] In recent years, some improved fuel gasification furnaces, such as secondary combustion furnaces, have emerged on the market, attempting to improve efficiency through staged combustion or optimized air intake structure. However, existing technologies still suffer from incomplete combustion and low energy utilization efficiency, failing to achieve highly efficient and environmentally friendly combustion. Utility Model Content
[0004] To solve the above-mentioned technical problems, the present invention discloses a fuel gasification furnace.
[0005] A fuel gasification furnace, comprising:
[0006] The furnace chamber includes:
[0007] The first combustion chamber has a first opening at the top and a first vent hole, through which external oxygen can enter the first combustion chamber. The first combustion chamber is used to perform primary combustion of fuel.
[0008] The second combustion chamber has a second opening and a third opening arranged opposite each other along the height direction of the fuel gasifier. The third opening is connected to the first opening. The side wall of the second combustion chamber is provided with a second air hole. The products of the primary combustion enter the second combustion chamber through the first opening and the third opening. The second combustion chamber is used to receive the products from the primary combustion and perform secondary combustion.
[0009] The third combustion chamber is located on the outer periphery of the second combustion chamber. The third combustion chamber is connected to the second combustion chamber through the second vent. The products of the secondary combustion enter the third combustion chamber through the second vent. The third combustion chamber is used to receive the products from the secondary combustion and perform a third combustion.
[0010] The furnace shell has a furnace liner inside it. The top of the furnace shell has a fourth opening for receiving the container to be heated. A fourth combustion chamber is formed between the furnace shell and the furnace liner. The fourth combustion chamber is connected to the second combustion chamber through the second opening. The products of the three combustions enter the second combustion chamber through the second vent and then reach the fourth combustion chamber through the second opening. The fourth combustion chamber is used to receive the products from the three combustions and perform four combustions. The energy from the four combustions is used to heat the container to be heated.
[0011] By adopting the above technical solution, the four combustion chambers—the first, second, third, and fourth combustion chambers—along with their openings and vents, can be interconnected to form an optimized airflow path. This allows the high-temperature flue gas to flow sequentially through each combustion chamber region, ensuring sufficient airflow residence time for efficient and complete combustion, while also achieving cascade utilization of heat. This maximizes the release of fuel energy and improves energy utilization efficiency.
[0012] Optionally, the first air holes are provided on the side wall and bottom wall of the first combustion chamber. The first air holes on the side wall are distributed circumferentially and form multiple rings along the height direction. The first air holes on the bottom wall are distributed circumferentially and form multiple rings along the radial direction of the fuel gasifier.
[0013] Optionally, the second combustion chamber includes a cylindrical section and a horn section, which are connected and joined together along the height direction. The cross-sectional area of the horn section gradually increases along a first direction, which is the direction from the second opening to the third opening.
[0014] Optionally, the second vent is provided on the peripheral wall of the horn portion and on the peripheral wall of the cylindrical portion along the height direction near the horn portion.
[0015] Optionally, the peripheral wall of the cylindrical portion on the side away from the horn portion along the height direction is not in communication with the third combustion chamber.
[0016] Optionally, the area of the second vent occupies 8% to 15% of the area of the sidewall of the second combustion chamber.
[0017] Optionally, the furnace shell is provided with an air inlet and an exhaust outlet. The air inlet is used to introduce external oxygen into the furnace shell, and the exhaust outlet is used to discharge the products of the four combustion processes.
[0018] Optionally, the first opening has an extension extending outward in the circumferential direction of the first opening, the extension being connected to the bottom of the third combustion chamber in the height direction, the extension having a third vent, and oxygen between the furnace shell and the furnace liner entering the third combustion chamber through the third vent.
[0019] Optionally, the diameter of the first pore is 2-5 mm, the number of the first pores is 150-170, the diameter of the second pore is 2-5 mm, the number of the second pores is 125-150, the diameter of the third pore is 2-5 mm, and the number of the third pores is 10-15.
[0020] Optionally, the height of the first combustion chamber is 15-30cm, the height of the second combustion chamber is 8-20cm, and the height of the third combustion chamber is 15-20cm.
[0021] Optionally, the top of the third combustion chamber is dome-shaped with an opening in the middle.
[0022] Optionally, the system further includes a feed chamber for storing the fuel, including a feed inlet, the feed chamber extending from the feed inlet through the side wall of the furnace shell and communicating with the first combustion chamber, so that the fuel from the feed chamber can be delivered to the first combustion chamber.
[0023] Optionally, the feeding chamber is provided with a groove surrounding the outer surface of the feeding chamber, and the groove is provided with a fourth air hole. The fourth air hole is an oblique hole relative to the outer surface of the feeding chamber, and external oxygen enters the feeding chamber through the fourth air hole. Attached Figure Description
[0024] Figure 1 This is a cross-sectional schematic diagram of the right view of the fuel gasification furnace of this utility model;
[0025] Figure 2 A bottom view of the furnace liner of this utility model is shown;
[0026] Figure 3 This is a front view schematic diagram of the second combustion chamber of this utility model;
[0027] Figure 4 This is a right-side view of the feeding chamber of the present invention;
[0028] Figure 5 A three-dimensional schematic diagram of the furnace liner and feeding chamber of this utility model is shown;
[0029] Figure 6 A three-dimensional schematic diagram of the fuel gasification furnace of this utility model is shown;
[0030] Figure 7 This diagram shows the airflow path in the fuel gasification furnace of this invention.
[0031] Figure 8 This diagram shows the bottom of the heated container after it has been heated by the fuel gasification furnace of this invention.
[0032] 01. Heated container, 0. Fuel gasification furnace
[0033] 1. Furnace shell; 11. Fourth opening; 12. Air inlet; 13. Exhaust outlet.
[0034] 2. Furnace chamber, 21. First combustion chamber, 211. First opening, 212. First vent, 213. Extension, 2131. Third vent, 214. Fourth opening, 22. Second combustion chamber, 2201. Cylindrical section, 2202. Trumpet section, 221. Second opening, 222. Third opening, 223. Second vent, 23. Third combustion chamber, 231. Top, 2311. Opening, 24. Fourth combustion chamber
[0035] 3. Feed chamber; 31. Feed inlet; 32. Groove; 321. Fourth air hole; 33. Protruding ridge.
[0036] x. Circumferential direction, z. Radial direction, y. Height direction, y1. First direction. Detailed Implementation
[0037] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0038] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0039] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0040] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.
[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0042] In the embodiments of this utility model, a "fuel gasification furnace" refers to a furnace that controls oxygen and fuel to cause the fuel to undergo a gasification reaction under incomplete combustion conditions, generating combustible gas before combustion, thereby achieving complete combustion of the fuel.
[0043] In embodiments of this utility model, "fuel" is, for example, firewood or manure. Firewood includes biomass fuels such as wood, branches, straw, and corn cobs; manure includes animal manure such as cow and sheep manure.
[0044] refer to Figures 1 to 6 The present invention discloses a fuel gasification furnace 0, which includes a furnace shell 1, a furnace chamber 2, and a feeding chamber 3. The furnace chamber 2 includes a first combustion chamber 21, a second combustion chamber 22, and a third combustion chamber 23.
[0045] The first combustion chamber 21 has a first opening 211 at its top and a first vent 212, through which external oxygen can enter. The first combustion chamber 21 is used for primary combustion of fuel. The temperature of the first combustion chamber 21 can reach 600–800°C. Primary combustion mainly involves drying and pyrolysis of the fuel. The combustion rate is 40%–45%, which is the ratio of the mass of fuel actually burned to the total mass of fuel in the first combustion chamber 21 before combustion. Pyrolysis produces a large amount of smoke and dust, including combustible gases such as carbon monoxide and hydrogen, and combustible substances such as coke, formaldehyde, acetic acid, and formic acid.
[0046] The second combustion chamber 22 is along the height direction of the fuel gasification furnace (e.g., Figure 1The combustion chamber 21 (shown in the y-direction) has a second opening 221 and a third opening 222 arranged opposite to each other. The third opening 222 is connected to the first opening 211, allowing the products of primary combustion to enter the second combustion chamber 22 through the first opening 211 and the third opening 222. The second combustion chamber 22 then receives the products from primary combustion and performs secondary combustion. The sidewall of the second combustion chamber also has a second vent 223. The temperature of the second combustion chamber 22 can reach 800–1000°C, and the combustion rate in the second combustion chamber 22 is 20%–25%.
[0047] The third combustion chamber 23 is located on the outer periphery of the second combustion chamber 22, that is, the third combustion chamber 23 is fitted around the outer periphery of the second combustion chamber 22. The third combustion chamber 23 is connected to the second combustion chamber 22 through the second vent 223, so that the products of secondary combustion enter the third combustion chamber 23 through the second vent 223. Thus, the third combustion chamber 23 is used to receive the products from secondary combustion and perform tertiary combustion. The temperature of the third combustion chamber 23 can reach 1000-1100℃, and the combustion rate in the third combustion chamber 23 is 15%-20%.
[0048] Therefore, the third combustion chamber 23 is located on the outer periphery of the second combustion chamber 22, so that the heat generated by the second combustion chamber 22 can be further utilized by the third combustion chamber, promoting the three-stage combustion, and further promoting the continued combustion of unburned combustible gases and combustible materials in the third combustion chamber, releasing more heat, thereby effectively improving the combustion efficiency of fuel.
[0049] Furthermore, the top of the furnace shell 1 is provided with a fourth opening 11, which is used to receive the heated container 01. The furnace liner 2 is located inside the furnace shell 1, forming a fourth combustion chamber 24 between the furnace shell 1 and the furnace liner 2. The fourth combustion chamber 24 is connected to the second combustion chamber 22 through the second opening 221, while the third combustion chamber 23 is connected to the second combustion chamber 22 through the second vent 223. Thus, the products of the three combustions enter the second combustion chamber 22 through the second vent 223 and then reach the fourth combustion chamber 24 through the second opening 221. The fourth combustion chamber 24 is used to receive the products from the three combustions and perform a fourth combustion. Therefore, the energy from the four combustions is used to heat the heated container 01. The temperature of the fourth combustion chamber 24 can reach 1100-1200℃, and the combustion rate in the fourth combustion chamber 24 is 15%-20%.
[0050] The furnace shell 1 is also provided with an air inlet 12 and an exhaust outlet 13. The air inlet 12 is used to introduce external oxygen into the furnace shell 1, and the exhaust outlet 13 is used to discharge the products of the fourth combustion. For example, the air inlet 12 and the exhaust outlet 13 are respectively located along the height direction of the furnace shell (e.g., ...). Figure 1 (As shown in the y-direction) on the bottom and top sidewalls.
[0051] Specifically, a fourth combustion chamber 24 is formed between the furnace shell 1 and the furnace chamber 2. The furnace chamber 2 includes a first combustion chamber 21, a second combustion chamber 22, and a third combustion chamber 23. The fourth combustion chamber 24 is located outside the entire first, second, and third combustion chambers 23. Therefore, the residual heat after the first, second, and third combustions can be fully utilized by the fourth combustion chamber 24, which is also the residual heat utilization zone. Furthermore, after the fuel undergoes multiple combustions in the first, second, and third combustion chambers 21 and 23, the high-temperature combustion products are not directly discharged but enter the fourth combustion chamber 24 through the second vent 223 and the second opening 221 for four more combustions. The heat generated in the fourth combustion chamber 24 is directly used to heat the heated container 01. This process not only maximizes the conversion of fuel energy into heat energy but also reduces the emission of incompletely burned gases, lowers environmental pollution, and improves combustion efficiency.
[0052] For example, the fourth combustion chamber 24 is the fourth opening 11 along the height direction (e.g. Figure 1 The space between the y-direction shown and the second opening 221.
[0053] Using the above technical solution, the fuel is fully combusted through four independently configured combustion chambers via four combustion processes. Specifically, the furnace shell 2 is divided into three independent combustion chambers. The first combustion chamber 21 and the second combustion chamber 22 are arranged sequentially along the height direction and are connected through the first opening 211 and the third opening 222. The third combustion chamber 23 is located on the outer periphery of the second combustion chamber 22, forming an independent heating space. The third combustion chamber 23 is connected to the second combustion chamber 22 through the second vent 223. An independent fourth combustion chamber 24 is also formed between the furnace shell 1 and the furnace shell 2. The fourth combustion chamber 24 is connected to the third combustion chamber 23 through the second vent 223 and the second opening 221.
[0054] In other words, air containing oxygen enters the furnace shell 1 through the air inlet 12. Fuel is introduced into the first combustion chamber 21 through the first vent 212 for primary combustion. Subsequently, the products of primary combustion enter the second combustion chamber 22 through the first opening 211 and the third opening 222. During this process, the second combustion chamber 22 can be supplemented with a suitable amount of air through the second vent 223, which facilitates secondary combustion of the incompletely burned products of primary combustion, further improving combustion efficiency. Next, the third combustion chamber 23, located on the outer periphery of the second combustion chamber 22, receives the products of secondary combustion through the second vent 223 for tertiary combustion. This not only optimizes the heat radiation transfer path but also further enhances combustion efficiency by increasing the effective heat exchange area. Furthermore, the fourth combustion chamber 24 is connected to the third combustion chamber 23 through the second opening 221 and the second vent 223. Due to its location outside the furnace shell 2, it also concentrates the residual heat from the other three combustion chambers, thereby receiving the products from the tertiary combustion of the third combustion chamber 23 for quaternary combustion. In this way, the energy after the four combustions is efficiently used to heat the heated container 01, and the products of the four combustions are discharged through the exhaust port 13.
[0055] Therefore, this utility model forms an optimized airflow path by interconnecting four independently set combustion chambers—the first combustion chamber 21, the second combustion chamber 22, the third combustion chamber 23, and the fourth combustion chamber 24—with their openings and vents. This allows the high-temperature flue gas generated by fuel combustion to flow sequentially through each independently set combustion chamber area, ensuring that the needs of each combustion zone are met, enabling efficient and complete combustion of oxygen and fuel, reducing the generation of smoke at the exhaust port 13, and achieving cascade utilization of heat. This maximizes the release of fuel energy and improves energy utilization efficiency.
[0056] Preferably, the height of the first combustion chamber 21 is 15-30 cm, the height of the second combustion chamber 22 is 8-20 cm, and the height of the third combustion chamber 23 is 15-20 cm. The relatively large height range of the first combustion chamber 21 facilitates the accumulation of a large amount of fuel, providing ample space for primary combustion and ensuring sufficient contact between the fuel and oxygen for efficient combustion in the initial stage. It also provides sufficient reaction time for fuel gasification and preliminary pyrolysis, thereby improving fuel conversion efficiency. This avoids the problems of incomplete combustion due to limited space or heat loss due to redundant space. The height of the second combustion chamber 22 is relatively shorter than the other combustion chambers, but sufficient to receive combustion products from the first combustion chamber for secondary combustion. Its height design ensures that combustion products mix thoroughly with oxygen in a short time and complete combustion more completely, further releasing energy while reducing the generation of incompletely combusted products. The height of the third combustion chamber 23 is between that of the first and second combustion chambers, providing sufficient space for secondary combustion products to undergo tertiary combustion while ensuring the stability and efficiency of the combustion process, further improving fuel utilization and combustion efficiency.
[0057] In some possible embodiments of this utility model, reference is made to Figure 1 and Figure 2 As shown, the first air vent 212 is provided on the side wall and bottom wall of the first combustion chamber 21, and the first air vent 212 on the side wall is circumferential (e.g., Figure 2 The x-direction shown is distributed along the height direction (e.g., the x-direction) and along the height direction (e.g.) Figure 1 Multiple rings are formed in the y-direction shown, and the first vent 212 on the bottom wall is circumferentially (e.g., along the y-direction). Figure 2 The distribution (in the x-direction shown) and along the radial direction of the fuel gasifier (e.g.) Figure 2 Multiple rings are formed in the z-direction shown. The uniform distribution of the first air vents 212 in the first combustion chamber 21 ensures that air can enter the first combustion chamber 21 evenly and comprehensively, avoiding incomplete local combustion.
[0058] In this embodiment, the diameter of the first air hole 212 is 2-5 mm, and the number of the first air holes 212 is 150-170. Further, the number of the first air holes 212 on the side wall is 130-140, and the number of the first air holes 212 on the bottom wall is 20-30. This precise number and diameter of the first air holes 212 not only ensures that air can fully enter the first combustion chamber 21, but also guarantees sufficient oxygen per unit time, thereby accelerating the drying and pyrolysis of fuel in the first combustion chamber 21. It also promotes complete combustion of fuel, reduces the emission of incomplete combustion products, lowers environmental pollution, and helps achieve a highly efficient and environmentally friendly combustion effect.
[0059] In some possible embodiments of this utility model, combined with Figure 1 and Figure 3 As shown, the second combustion chamber 22 includes a cylindrical portion 2201 and a horn portion 2202, the horn portion 2202 having a horn-shaped structure, the cylindrical portion 2201 and the horn portion 2202 being aligned along the height direction (e.g.) Figure 1 As shown in the y-direction, the horn section 2202 is connected along the first direction (e.g., the cross-sectional area along the first direction). Figure 3 The y1 direction shown gradually increases, and the first direction (e.g.) Figure 3 The y1 direction shown is the direction from the second opening 221 toward the third opening 222.
[0060] Specifically, the products of primary combustion enter the flared section 2202 of the second combustion chamber 22 through the first opening 211 and the third opening 222. As the products of primary combustion continue to rise, the cross-sectional area of the flared section 2202 gradually decreases in the opposite direction to the first direction until the products of primary combustion reach the cylindrical section 2201. Thus, through the converging effect of the flared section 2202, the flame in the first combustion chamber 21 is effectively focused when it rises to the flared section 2202, allowing the products of primary combustion to fully contact the flame, improving the combustion efficiency of the products of primary combustion in the secondary combustion, thereby further reducing the emission of incomplete combustion products.
[0061] Furthermore, the cylindrical portion 2201 along the height direction (e.g.) Figure 1 The peripheral wall on the side away from the horn section 2202 (as shown in the y-direction) is not connected to the third combustion chamber 23. This increases the residence time of the primary combustion products in the second combustion chamber 22, thus providing more sufficient time and space for secondary combustion and ensuring a more complete secondary combustion reaction.
[0062] In some possible embodiments of this utility model, the second air hole 223 is provided on the peripheral wall of the flared portion 2202 and the cylindrical portion 2201 along the height direction (e.g. Figure 1 The circumferential wall on the side near the horn section 2202 (as shown in the y direction) ensures a sufficient and comprehensive supply of oxygen during combustion.
[0063] In this embodiment, the area of the second air hole 223 accounts for 8% to 15% of the area of the side wall of the second combustion chamber 22, that is, the area of the second air hole 223 accounts for 8% to 15% of the total area of the peripheral wall of the trumpet part 2202 and the peripheral wall of the cylinder part 2201. The reasonable air intake ensures a sufficient supply of oxygen during the combustion process, making the combustion more stable and efficient, which is conducive to the continuous and stable operation of the fuel gasifier 0.
[0064] Furthermore, the diameter of the second vent 223 is 2–5 mm, and the number of second vents 223 is 125–150. Even further, the number of second vents 223 in the flared section 2202 is 70–80, and the number of second vents 223 in the cylindrical section 2201 is 60–70. This ensures thorough mixing of oxygen with the products of primary combustion, further improving fuel combustion efficiency and reducing emissions of incompletely combusted substances.
[0065] In some possible embodiments of this utility model, reference is made to Figure 1 and Figure 2 As shown, the first opening 211 is provided along the circumference of the first opening (e.g., Figure 2 An extension 213 extending outward in the x-direction (as shown), the extension 213 extending along the height direction (e.g.) Figure 1 The third combustion chamber 23 (as shown in the y-direction) is aligned with the bottom of the second combustion chamber 22. Specifically, the third combustion chamber 23 has an outer shell, meaning it is surrounded by the outer shell, the sidewalls of the second combustion chamber 22, and the extension 213. Furthermore, the extension 213 is provided with a third vent 2131, through which oxygen between the furnace shell 1 and the furnace liner 2 enters the third combustion chamber 23, providing sufficient oxygen for the tertiary combustion. Further, the oxygen entering the third combustion chamber 23 can enter the second combustion chamber 22 through the second vent 223, providing sufficient oxygen for the secondary combustion.
[0066] Among them, the third pore 2131 is distributed circumferentially (e.g. Figure 2 (as shown in the x direction), the diameter of the third vent 2131 is 2-5 mm, and the number of the third vent 2131 is 10-15, so that oxygen can enter the third combustion chamber 23 evenly, thereby promoting the full mixing of combustion products and oxygen, and further improving the combustion efficiency of fuel.
[0067] In some possible embodiments of this utility model, reference is made to Figure 1 and Figure 5 As shown, the top 231 of the third combustion chamber 23 is dome-shaped with an opening 2311 in the middle. This allows the products of secondary combustion to form a swirling airflow within the third combustion chamber 23, which is beneficial for heat accumulation and prolongs the residence time of the products of secondary combustion within the third combustion chamber 23. This provides more sufficient reaction time for the products of secondary combustion, thereby promoting a more uniform mixing of fuel and oxygen and a more complete combustion reaction. In addition, the formation of the swirling airflow also enhances the heat transfer effect within the third combustion chamber 23, allowing the heat generated by combustion to be distributed more evenly within the third combustion chamber 23, further improving fuel combustion efficiency.
[0068] Furthermore, the top of the fourth combustion chamber 24 is dome-shaped with an opening in the middle, which helps to further concentrate heat and prolong the residence time of the products of the three combustions, thereby further improving the combustion efficiency of the fuel.
[0069] In some possible embodiments of this utility model, combined with Figure 1 and Figures 4-6 As shown, the feed chamber 3 is used to store fuel and includes a feed inlet 31. The feed chamber 3 extends from the feed inlet 31 through the side wall of the furnace shell 1 and communicates with the first combustion chamber 21, so that the fuel from the feed chamber 3 can be transported to the first combustion chamber 21.
[0070] In this embodiment, the first combustion chamber 21 is provided with a fourth opening 214 corresponding to the feed inlet 31. The feed chamber 3 is connected to the first combustion chamber 21 through the fourth opening 214. After the fuel enters the feed chamber 3 through the feed inlet 31, it reaches the first combustion chamber 21 through the fourth opening 214.
[0071] In some possible embodiments of this utility model, the feed chamber 3 is provided with a groove 32 surrounding the outer surface of the feed chamber 3, and the groove 32 is provided with a fourth air hole 321. Due to the surrounding design of the groove 32 and the fourth air hole 321, oxygen can be uniformly introduced into the first combustion chamber 21 in all directions without dead angles, continuously providing sufficient oxygen for combustion, so that the fuel can fully contact oxygen from the beginning, thereby achieving efficient combustion.
[0072] The fourth vent 321 is an oblique hole relative to the outer surface of the feed chamber 3, allowing external oxygen to enter the feed chamber 3. During fuel combustion, occasional backflow of the flame may occur due to unstable airflow, which not only wastes fuel but may also pose safety hazards. The oblique shape of the fourth vent 321 relative to the outer surface of the feed chamber 3 helps balance the air pressure between the fuel gasifier 0 and the outside environment, ensuring stable flame combustion and eliminating the possibility of backflow of the flame from the combustion chamber into the feed chamber 3. This provides users with greater peace of mind during operation.
[0073] Preferably, the diameter of the fourth pore 321 is 2-5 mm, and the number of the fourth pores 321 is 40-50 to ensure sufficient oxygen supply.
[0074] Furthermore, the inner surface of the bottom of the feed chamber 3 is also provided with radial (e.g.) Figure 5 The convex ridge 33 extends in the z direction (as shown). The setting of the convex ridge 33 further optimizes the airflow path. When oxygen enters through the fourth air hole 321, it will be guided a second time by the convex ridge 33, which accelerates the flow of oxygen and allows it to penetrate into the gaps of the fuel in the first combustion chamber 21 more quickly. This greatly accelerates the combustion efficiency of the fuel, and the fuel that may have burned slowly becomes more powerful and concentrated.
[0075] In some possible embodiments of this utility model, reference is made to Figure 7 The diagram shows the airflow path. External air can enter the furnace shell 1 through the air inlet 12 or the feed inlet 31. The air entering the furnace shell 1 can be divided into three airflows, denoted as airflow a, airflow b, and airflow c. Airflow a enters the feed chamber 3 through the fourth vent 321 and then reaches the first combustion chamber 21 through the fourth opening 214. Airflow b enters the first combustion chamber 21 through the first vent 212 at the bottom of the first combustion chamber 21. Airflow c enters the first combustion chamber 21 through the first vent 212 on the side wall of the first combustion chamber 21. At this time, the first combustion chamber 21 receives oxygen from the three airflows to perform primary combustion of the fuel. The products of primary combustion (including carbon monoxide, hydrogen, coke, formaldehyde, acetic acid, or formic acid) continue to rise with the airflow and enter the second combustion chamber 22 through the first opening 211 and the third opening 222. Airflows a and c also enter the third combustion chamber 23 through the third vent 2131. Since the third combustion chamber 23 is located on the outer periphery of the second combustion chamber 22, it is connected to the second combustion chamber 22 through the second vent 223. At this time, the second combustion chamber 22 can be supplemented with a suitable amount of air through the second vent 223, thereby performing secondary combustion on the products after the primary combustion. The products of the secondary combustion flow with the airflow through the second vent 223 to reach the third combustion chamber 23. The third combustion chamber 23 receives oxygen from inside the furnace shell 1 through the third vent 2131 to perform a tertiary combustion on the products of the secondary combustion. The products of the tertiary combustion continue to flow with the airflow through the second vent 223 to reach the second combustion chamber 22, and then continue to rise, reaching the fourth combustion chamber 24 through the second opening 221. The oxygen inside the furnace shell 1 continues to rise, forming a swirling airflow d in the heating space between the second opening 221 and the fourth opening 11 along the height direction. At this time, the oxygen in the swirling airflow d is used to perform a fourth combustion on the products after the third combustion, thereby achieving complete combustion of the fuel. This results in smokeless emissions from the exhaust port 13, meaning that the products of the fourth combustion emitted from the exhaust port 13 do not contain smoke. The energy generated by the complete combustion of the fuel is gathered in the heating space and used to heat the heated container 01, thereby achieving high-efficiency energy utilization and combustion efficiency.
[0076] In the above embodiments, the furnace liner 2 is integrally formed from multiple layers of cast iron. The integrally formed furnace liner 2 possesses excellent high-temperature resistance, capable of withstanding the high temperatures generated by fuel combustion, ensuring that the furnace liner 2 will not deform or be damaged due to high temperatures during long-term use, with a service life of up to 30 years. Simultaneously, the cast iron material itself has good thermal conductivity, enabling rapid transfer of the heat generated by combustion to the outer wall of the furnace liner 2, and then to the fourth combustion chamber 24 for four-stage combustion, thus transferring the combustion capacity to the heated container 01 and improving the efficiency of thermal energy utilization. Furthermore, the multi-layered structure design further enhances the strength and stability of the furnace liner 2, enabling it to withstand the high pressure generated by internal combustion, ensuring the safety and reliability of the furnace liner 2 under high-temperature and high-pressure environments. The integral forming process also avoids the potential leakage risks caused by splicing or welding, improving the sealing performance of the furnace liner 2 and reducing heat loss.
[0077] In this embodiment, the present invention uses firewood as fuel, which is burned in the fuel gasification furnace 0 described in the above embodiment. Since the temperature inside the fourth combustion chamber 24 is 1100-1200℃, the mineral salts (such as potassium salts, sodium salts, etc.) in the firewood are converted into gaseous minerals. As the hot airflow continues to rise, the gaseous minerals come into contact with the relatively cooler heated container 01. The bottom temperature of the heated container 01 (e.g., a pot) is typically around 100℃-300℃. Upon cooling, the gaseous minerals quickly condense at the bottom of the heated container 01, forming a white substance. Figure 8 As shown, area B represents the original surface morphology of the heated container 01 before it comes into contact with the flame; area A represents the white substance formed by gaseous minerals at the bottom of the heated container 01, i.e., the white bottom phenomenon. This demonstrates that, compared to traditional gasification furnaces, the fuel gasification furnace 0 effectively improves the problem of black bottoms easily forming on cookware.
[0078] In existing technologies, the black background phenomenon is usually formed by the deposition of carbon particles and soot from incomplete combustion, while the white background is the result of mineral salts volatilizing at high temperatures and condensing on low-temperature surfaces. Compared to the black background phenomenon in existing technologies, the white background has relatively weak adhesion to the heated container 01, making it easier for users to clean. It can be removed with a simple wipe, greatly reducing the difficulty and workload of cleaning. In addition, the formation of the white background also indicates that the fuel in this embodiment has undergone complete combustion, that is, smokeless emissions have been achieved.
[0079] Furthermore, when providing the same amount of heat to heat the container 01, the fuel gasifier 0 in the above embodiments can save 25% to 40% of fuel compared to gasifiers in the prior art, i.e., energy saving of 25% to 40%. Specifically, the energy saving value is the ratio of the difference between the mass of fuel required by a gasifier in the prior art and the mass of fuel required by the fuel gasifier 0, to the mass of fuel required by the gasifier in the prior art, when providing the same amount of heat. For example, when 1000 joules of heat are required to heat the container 01, the fuel gasifier 0 of this invention only needs 7 kg of fuel to generate 1000 joules of heat, while a gasifier in the prior art needs 10 kg of the same amount of fuel to generate 1000 joules of heat, i.e., energy saving of 30%.
[0080] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.
Claims
1. A fuel gasification furnace, characterized in that, include: The furnace chamber includes: The first combustion chamber has a first opening at the top and a first vent hole, through which external oxygen can enter the first combustion chamber. The first combustion chamber is used to perform primary combustion of fuel. The second combustion chamber has a second opening and a third opening arranged opposite each other along the height direction of the fuel gasifier. The third opening is connected to the first opening. The side wall of the second combustion chamber is provided with a second air hole. The products of the primary combustion enter the second combustion chamber through the first opening and the third opening. The second combustion chamber is used to receive the products from the primary combustion and perform secondary combustion. The third combustion chamber is located on the outer periphery of the second combustion chamber. The third combustion chamber is connected to the second combustion chamber through the second vent. The products of the secondary combustion enter the third combustion chamber through the second vent. The third combustion chamber is used to receive the products from the secondary combustion and perform a third combustion. The furnace shell has a furnace liner inside it. The top of the furnace shell has a fourth opening for receiving the container to be heated. A fourth combustion chamber is formed between the furnace shell and the furnace liner. The fourth combustion chamber is connected to the second combustion chamber through the second opening. The products of the three combustions enter the second combustion chamber through the second vent and then reach the fourth combustion chamber through the second opening. The fourth combustion chamber is used to receive the products from the three combustions and perform four combustions. The energy from the four combustions is used to heat the container to be heated.
2. The fuel gasification furnace as described in claim 1, characterized in that, The first air holes are provided on the side wall and bottom wall of the first combustion chamber. The first air holes on the side wall are distributed circumferentially and form multiple rings along the height direction. The first air holes on the bottom wall are distributed circumferentially and form multiple rings along the radial direction of the fuel gasification furnace.
3. A fuel gasification furnace as described in claim 1, characterized in that, The second combustion chamber includes a cylindrical section and a horn section, which are connected and joined together along the height direction. The cross-sectional area of the horn section gradually increases along a first direction, which is the direction from the second opening to the third opening.
4. A fuel gasification furnace as described in claim 3, characterized in that, The second air hole is provided on the peripheral wall of the horn portion and on the peripheral wall of the cylindrical portion along the height direction near the horn portion.
5. A fuel gasification furnace as described in claim 4, characterized in that, The peripheral wall of the cylindrical section on the side away from the horn section along the height direction is not in communication with the third combustion chamber.
6. A fuel gasification furnace as described in claim 1, characterized in that, The area of the second vent occupies 8% to 15% of the area of the sidewall of the second combustion chamber.
7. A fuel gasification furnace as described in claim 1, characterized in that, The furnace shell is provided with an air inlet and an exhaust outlet. The air inlet is used to introduce external oxygen into the furnace shell, and the exhaust outlet is used to discharge the products of the four combustion processes.
8. A fuel gasification furnace as described in claim 7, characterized in that, The first opening has an extension that extends outward in the circumferential direction of the first opening. The extension is connected to the bottom of the third combustion chamber in the height direction. The extension has a third vent, through which oxygen between the furnace shell and the furnace liner enters the third combustion chamber.
9. A fuel gasification furnace as described in claim 8, characterized in that, The diameter of the first pore is 2-5 mm, and the number of the first pores is 150-170. The diameter of the second pore is 2-5 mm, and the number of the second pores is 125-150. The diameter of the third pore is 2-5 mm, and the number of the third pores is 10-15.
10. A fuel gasification furnace as described in claim 1, characterized in that, The height of the first combustion chamber is 15-30cm, the height of the second combustion chamber is 8-20cm, and the height of the third combustion chamber is 15-20cm.
11. A fuel gasification furnace as described in claim 1, characterized in that, The top of the third combustion chamber is dome-shaped with an opening in the middle.
12. A fuel gasification furnace as described in any one of claims 1-11, characterized in that, It also includes a feed chamber for storing the fuel, including a feed inlet, the feed chamber extending from the feed inlet through the side wall of the furnace shell and communicating with the first combustion chamber, so that the fuel from the feed chamber can be delivered to the first combustion chamber.
13. A fuel gasification furnace as described in claim 12, characterized in that, The feeding chamber is provided with a groove surrounding the outer surface of the feeding chamber, and the groove is provided with a fourth air hole. The fourth air hole is an oblique hole relative to the outer surface of the feeding chamber, and external oxygen enters the feeding chamber through the fourth air hole.