Anti-backfire structure of biomass energy-saving stove

Abstract

The utility model relates to the technical field of biomass energy-saving furnaces, in particular to an anti-backfire structure of a biomass energy-saving furnace, which comprises a fuel bin, a feeding end of a conveying mechanism is arranged at the bottom of the fuel bin, a transition bin is arranged at a discharging end of the conveying mechanism, a discharging pipe is arranged at the bottom of the transition bin, the discharging pipe is arranged in an air chamber in a penetrating manner, one side of the air chamber is connected with a fan, and the other side of the air chamber is connected with an air outlet. A gas material pipe is arranged on the other side of the gas chamber, the gas material pipe and the discharging pipe are coaxially arranged, and the outlet end of the gas material pipe is arranged in the combustion chamber. The fuel bin achieves automatic feeding of biomass fuel into the combustion chamber through the arranged conveying mechanism, the fuel is lifted into the transition bin through the conveying mechanism, the fuel in the transition bin enters the gas material pipe through the discharging pipe and finally enters the combustion chamber, and danger caused by backfire entering the conveying mechanism is avoided through buffering of the transition bin.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass energy-saving stoves, in particular to a flashback prevention structure of a biomass energy-saving stove. Background Art

[0002] Biomass energy-saving furnace is a fuel that directly utilizes crop straw, wood chips, sawdust, peanut shells, corn cobs, rice husks, branches, leaves, and hay through compression molding. It does not have any additives or binders and is a clean energy source. When burning biomass fuel, existing boilers are prone to flashback during the combustion process and burn in the discharge pipe. In severe cases, the conveying mechanism, fuel bin, and the entire feeding system are burned, making the boiler unable to feed normally, which seriously affects the safe operation of the biomass energy-saving furnace. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a flashback prevention structure of a biomass energy-saving stove in view of the above-mentioned technical deficiencies, thereby solving the problem of flashback being easily generated during the combustion process.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a biomass energy-saving stove anti-backfire structure, including a fuel bin, a feeding end of a conveying mechanism is provided at the bottom of the fuel bin, a transition bin is provided at the discharge end of the conveying mechanism, a discharge pipe is provided at the bottom of the transition bin, the discharge pipe is passed through the air chamber, one side of the air chamber is connected to the fan, and the other side of the air chamber is provided with a gas pipe, the gas pipe and the discharge pipe are coaxially arranged, and the outlet end of the gas pipe is arranged in the combustion chamber.

[0005] To further optimize the technical solution, an air inlet hole is provided at the bottom of the transition bin, and the air inlet hole is arranged in the air chamber.

[0006] To further optimize the technical solution, the conveying mechanism is a rodless screw conveyor, the height of the feed end of the conveying mechanism is smaller than the height of the discharge end, a conveying motor is provided on one side of the feed end of the conveying mechanism, and the conveying motor is electrically connected to the controller.

[0007] To further optimize the technical solution, a main air duct is provided at the air outlet of the fan, the main air duct is connected to the bottom of the combustion chamber, the upper part of the main air duct is connected to an auxiliary air duct, and the fan is connected to the air chamber through the provided auxiliary air duct.

[0008] To further optimize the technical solution, an air valve is provided in the auxiliary air duct, and the air valve is electrically connected to the controller.

[0009] To further optimize the technical solution, the outlet of the discharge pipe is arranged on the inner side of the gas pipe.

[0010] To further optimize the technical solution, the conveying pipe of the conveying mechanism is tapered, and the radial diameter of the discharge end of the conveying mechanism is smaller than the radial diameter of the feed end.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The fuel bin realizes the automatic feeding of biomass fuel into the combustion chamber through the conveying mechanism. The fuel is lifted into the transition bin by the conveying mechanism. The fuel in the transition bin then enters the gas pipe through the discharge pipe and finally enters the combustion chamber. The buffer of the transition bin prevents flashback from entering the conveying mechanism and causing danger.

[0013] 2. The gas pipe and the discharge pipe are coaxially arranged, and the outlet end of the gas pipe is arranged in the combustion chamber. The high-speed airflow in the gas pipe can accelerate the fuel in the discharge pipe to enter the gas pipe by using the Venturi effect and the air inlet hole, further preventing the hot air flow in the combustion chamber from entering the combustion chamber, and effectively avoiding backfire. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a biomass energy-saving stove anti-backfire structure;

[0015] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0016] In the figure: 1. fuel tank; 2. conveying mechanism; 21. conveying motor; 3. transition tank; 30. air inlet; 31. discharge pipe; 4. combustion chamber; 41. combustion disk; 5. fan; 51. main air duct; 52. auxiliary air duct; 53. air chamber; 54. air material pipe; 55. air valve. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the reference drawings of specific embodiments. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0018] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. used in the present application documents indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0019] Combination Figures 1 to 2As shown, a flashback prevention structure of a biomass energy-saving stove comprises a fuel bin 1 and a combustion chamber 4 on one side, a combustion disk 41 is arranged at the lower side of the combustion chamber 4, a fan 5 is arranged at the bottom of the fuel bin 1, and a main air duct 51 is arranged at the air outlet of the fan 5, and the main air duct 51 is connected to the bottom of the combustion disk 41 in the combustion chamber 4. The bottom of the fuel bin 1 is provided with a feed end of a conveying mechanism 2, the conveying mechanism 2 is a rodless screw conveyor, and a transition bin 3 is arranged at the discharge end of the conveying mechanism 2. The height of the feed end of the conveying mechanism 2 is less than the height of the discharge end, the conveying pipe of the conveying mechanism 2 is conical, and the radial diameter of the discharge end of the conveying mechanism 2 is less than the radial diameter of the feed end. The set cone can further increase the fuel density at the discharge end, reduce the gap, and prevent the hot air in the combustion chamber 4 from entering the fuel bin 1. A conveying motor 21 is arranged on one side of the feed end of the conveying mechanism 2, and the conveying motor 21 is electrically connected to the controller.

[0020] Combination Figure 2 As shown, a discharge pipe 31 is provided at the bottom of the transition bin 3, and the discharge pipe 31 is arranged in the air chamber 53. An air inlet 30 is provided at one side of the bottom of the transition bin 3, and the air inlet 30 is arranged in the air chamber 53. The upper part of the main air duct 51 is connected with a secondary air duct 52, and the fan 5 is connected with one side of the air chamber 53 through the secondary air duct 52. An air pipe 54 is provided on the other side of the air chamber 53, and the air pipe 54 is coaxially arranged with the discharge pipe 31, and the outlet of the discharge pipe 31 is arranged on the inner side of the air pipe 54. The outlet end of the air pipe 54 is arranged in the combustion chamber 4. An air valve 55 is provided in the secondary air duct 52, and the air valve 55 is electrically connected to the controller.

[0021] When using, combine Figures 1 to 2 As shown, the fuel bin 1 is used to store biomass fuel. The fuel bin 1 realizes automatic feeding of biomass fuel into the combustion chamber 4 through the provided conveying mechanism 2. During the feeding process, the conveying motor 21 is first started, and the fuel is lifted into the transition bin 3 by the shaftless screw in the conveying mechanism 2. The fuel in the transition bin 3 then enters the gas pipe 54 through the discharge pipe 31. At this time, the fan 5 and the gas valve 55 are in an open state, and the fuel can be blown onto the combustion disk 41 in the combustion chamber 4. The high-speed airflow in the gas pipe 54 can accelerate the fuel in the discharge pipe 31 to enter the gas pipe 54 by using the Venturi effect in conjunction with the air inlet 30, so as to prevent the hot airflow in the combustion chamber 4 from entering the fuel bin 1, and effectively prevent backfire.

[0022] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or within the equivalent forms of such scope and boundaries.

Claims

1. A biomass energy-saving stove anti-flashback structure, comprising a fuel bin (1), characterized in that: The bottom of the fuel bin (1) is provided with a feed end of a conveying mechanism (2), the discharge end of the conveying mechanism (2) is provided with a transition bin (3), the bottom of the transition bin (3) is provided with a discharge pipe (31), the discharge pipe (31) is passed through an air chamber (53), one side of the air chamber (53) is connected to a fan (5), the other side of the air chamber (53) is provided with an air pipe (54), the air pipe (54) is coaxially arranged with the discharge pipe (31), and the outlet end of the air pipe (54) is arranged in the combustion chamber (4).

2. The anti-backfire structure of a biomass energy-saving stove according to claim 1, characterized in that: An air inlet hole (30) is provided at the bottom of the transition bin (3), and the air inlet hole (30) is arranged in the air chamber (53).

3. The anti-flashback structure of a biomass energy-saving stove according to claim 1 is characterized in that: The conveying mechanism (2) is a rodless screw conveyor, the height of the feed end of the conveying mechanism (2) is smaller than the height of the discharge end, a conveying motor (21) is provided on one side of the feed end of the conveying mechanism (2), and the conveying motor (21) is electrically connected to a controller.

4. The anti-backfire structure of a biomass energy-saving stove according to claim 3 is characterized by: The air outlet of the fan (5) is provided with a main air duct (51), the main air duct (51) is connected to the bottom of the combustion chamber (4), the upper part of the main air duct (51) is connected to an auxiliary air duct (52), and the fan (5) is connected to the air chamber (53) through the auxiliary air duct (52).

5. The anti-backfire structure of a biomass energy-saving stove according to claim 4, characterized in that: An air valve (55) is provided in the auxiliary air duct (52), and the air valve (55) is electrically connected to the controller.

6. The anti-backfire structure of a biomass energy-saving stove according to claim 1, characterized in that: The outlet of the discharge pipe (31) is arranged on the inner side of the gas pipe (54).

7. The anti-flashback structure of a biomass energy-saving stove according to claim 1, characterized in that: The conveying pipe of the conveying mechanism (2) is conical, and the radial diameter of the discharge end of the conveying mechanism (2) is smaller than the radial diameter of the feed end.

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