Biomass particle catalytic combustion smokeless furnace

Abstract

The utility model discloses a biomass particle catalytic combustion smokeless furnace, and belongs to the technical field of combustion furnaces. According to the smokeless furnace, the conical smoke return opening and the oxygenation smoke return assembly are designed, smoke dust generated during particle combustion can be collected, mixed with air and then conveyed into the combustion chamber again to be subjected to secondary or multiple times of combustion, particles are fully combusted, and then smokeless emission is achieved; and the conical flow guide plate is arranged on the upper side of the conical smoke return opening, on one hand, smoke dust which is not fully combusted can be prevented from being discharged out of the furnace body, meanwhile, heat can be conducted to the heat exchange pipe, the heat exchange efficiency is improved, and the problems that a traditional combustion furnace is large in smoke amount, low in boiler heat efficiency and poor in environment friendliness are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion furnaces, in particular to a biomass particle catalytic combustion smokeless furnace. Background Art

[0002] Biomass fuels are mostly rice husks, sawdust, corn cobs, cottonseed hulls, and other waste products that have been crushed and pulverized. Currently, the most common method of burning biomass pellets is to feed them directly into the boiler. This method is not conducive to full combustion of the fuel, resulting in high flue gas volumes, low boiler thermal efficiency, and poor environmental performance.

[0003] To this end, after a long period of practical improvement, we have designed a new type of biomass particle catalytic combustion smokeless furnace, which can achieve multiple and sufficient combustion of smoke in the furnace, thereby achieving the effect of smokeless emissions. At the same time, through the transformation of the internal structure of the furnace body, the conversion of thermal efficiency is also improved. The design is scientific and reasonable, and highly practical. Utility Model Content

[0004] The purpose of the utility model is to provide a biomass particle catalytic combustion smokeless stove to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A biomass particle catalytic combustion smokeless stove comprises a stove body, a combustion chamber is arranged at the bottom of the stove body, a biomass particle feeding device communicating with the combustion chamber is arranged on one side of the stove body, a conical smoke return port is arranged above the combustion chamber in the stove body, an oxygen-enhancing smoke return assembly is arranged in the stove body, which is used to mix the smoke at the conical smoke return port with air and then reintroduce it into the combustion chamber, a heat exchange cavity is arranged in the combustion chamber which is located above the conical smoke return port, a heat exchange tube is arranged on the inner wall of the heat exchange cavity, a smoke exhaust pipe is arranged on the top of the stove body, and a conical guide plate is arranged at the bottom of the heat exchange cavity to guide the smoke to the heat exchange tube.

[0007] As a further preferred solution of the present invention: the oxygen-enhancing smoke return component includes a smoke-oxygen mixing chamber arranged on the furnace body, a smoke collecting chamber is opened on the inner wall of the conical smoke return port, the smoke collecting chamber is communicated with the conical smoke return port through multiple smoke return holes, a smoke return fan is arranged in the smoke-oxygen mixing chamber, a smoke return pipe and an oxygen collecting pipe are arranged on the side of the smoke-oxygen mixing chamber close to the air inlet end of the smoke return fan, the smoke return pipe is communicated with the smoke collecting chamber, the oxygen collecting pipe is communicated with the outside of the furnace body for introducing air, and the side of the smoke-oxygen mixing chamber close to the air outlet end of the smoke return fan is communicated with the combustion chamber through the smoke outlet pipe.

[0008] As a further preferred solution of the present invention: the biomass particle feeding device includes a particle conveying auger arranged on one side of the furnace body, the inlet end of the particle conveying auger is connected to the particle hopper, and the outlet end of the particle conveying auger is communicated with the combustion chamber.

[0009] As a further preferred solution of the present invention: an ash area is provided in the furnace body at the bottom of the combustion chamber, a grate is provided between the combustion chamber and the ash area, and an igniter is provided on the lower side of the grate.

[0010] As a further preferred solution of the present invention: an oxygen supply machine is provided on one side of the furnace body, and the oxygen supply machine is communicated with the combustion chamber through an oxygen supply pipe.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The smokeless furnace is designed with a conical smoke return port and an oxygen-enriched smoke return component. When the smoke generated by the combustion of particles is collected and mixed with air, it is re-transported to the combustion chamber for secondary or multiple combustion, so that the particles are fully burned and smokeless emissions are achieved. A conical guide plate is provided on the upper side of the conical smoke return port. On the one hand, it can prevent the smoke that is not fully burned from being discharged from the furnace body, and on the other hand, it can also conduct heat to the heat exchange tube, thereby improving the heat exchange efficiency, effectively solving the problems of large smoke volume, low boiler thermal efficiency and poor environmental protection in traditional combustion furnaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of the biomass particle catalytic combustion smokeless stove of the utility model.

[0014] In the figure: 1. furnace body; 2. combustion chamber; 3. ash area; 4. grate; 5. oxygen supply machine; 6. oxygen supply pipe; 7. particle conveying auger; 8. particle hopper; 9. conical smoke return port; 10. smoke collecting chamber; 11. smoke return hole; 12. smoke-oxygen mixing chamber; 13. smoke return fan; 14. smoke return pipe; 15. oxygen collecting pipe; 16. smoke outlet pipe; 17. igniter; 18. heat exchange chamber; 19. heat exchange pipe; 20. smoke exhaust pipe; 21. conical guide plate. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0016] See also Figure 1The present embodiment provides a biomass pellet catalytic combustion smokeless stove, comprising a furnace body 1, a combustion chamber 2 provided at the bottom of the furnace body 1, and a biomass pellet feeding device communicating with the combustion chamber 2 provided on one side of the furnace body 1. As a conventional feeding technology familiar to those skilled in the art, preferably, the biomass pellet feeding device comprises a pellet conveying auger 7 provided on one side of the furnace body 1, the inlet end of the pellet conveying auger 7 is connected to a pellet hopper 8, and the outlet end of the pellet conveying auger 7 is communicated with the combustion chamber 2.

[0017] A conical smoke return port 9 is provided in the furnace body 1 above the combustion chamber 2. An oxygen-enhancing smoke return component is provided in the furnace body 1 for mixing the smoke at the conical smoke return port 9 with air and then re-introducing it into the combustion chamber 2. Specifically, the oxygen-enhancing smoke return component comprises a smoke-oxygen mixing chamber 12 provided on the furnace body 1. A smoke collecting chamber 10 is provided on the inner wall of the conical smoke return port 9. The smoke collecting chamber 10 is communicated with the conical smoke return port 9 through a plurality of smoke return holes 11. A smoke return fan 13 is provided in the smoke-oxygen mixing chamber 12. A smoke return pipe 14 and an oxygen collecting pipe 15 are provided on the side of the smoke-oxygen mixing chamber 12 close to the air inlet end of the smoke return fan 13. The smoke return pipe 14 is communicated with the smoke collecting chamber 10, and the oxygen collecting pipe 15 is communicated with the outside of the furnace body 1, for introducing air so that the returned smoke has sufficient oxygen, so that it can be fully burned after returning to the combustion chamber 2. In order to realize smoke reflux, it is preferred that the smoke-oxygen mixing chamber 12 is communicated with the combustion chamber 2 through a smoke outlet pipe 16 on the side close to the air outlet end of the smoke return fan 13.

[0018] At the same time, in order to achieve heat exchange, a heat exchange chamber 18 is provided in the combustion chamber 2, which is located on the upper side of the conical smoke return port 9, and a heat exchange tube 19 is provided on the inner wall of the heat exchange chamber 18. A smoke exhaust pipe 20 is provided on the top of the furnace body 1, that is, the smoke exhaust pipe 20 is located at the upper end of the heat exchange chamber 18 to discharge the gas after heat exchange. In order to ensure the exchange efficiency and enable the hot gas to fully contact the heat exchange tube 19, a conical guide plate 21 is provided at the bottom of the heat exchange chamber 18 to guide the smoke to the heat exchange tube 19; the design of the conical guide plate 21 also avoids the smoke generated by one combustion from entering the heat exchange chamber 18 too quickly, and can ensure that the smoke can be returned to the combustion chamber 2 at the conical smoke return port 9 to be fully burned. The design is scientific and reasonable.

[0019] At the same time, as a conventional design, an ash area 3 is provided at the bottom of the combustion chamber 2 in the furnace body 1, a grate 4 is provided between the combustion chamber 2 and the ash area 3, and an igniter 17 is provided on the lower side of the grate 4 for igniting the biomass particles. An oxygen supply machine 5 is also provided on one side of the furnace body 1, and the oxygen supply machine 5 is connected to the combustion chamber 2 through an oxygen supply pipe 6, so that the biomass particles can be fully burned.

[0020] In actual application, biomass particles are added to the particle conveying auger 7 through the particle hopper 8, and the particle conveying auger 7 delivers the particles into the combustion chamber 2. The oxygen supply machine 5 introduces air into the combustion chamber 2, and the igniter 17 ignites to make the particles burn. When the smoke generated after combustion reaches the conical smoke return port 9, under the action of the smoke return fan 13, it enters the smoke-oxygen mixing chamber 12 through the smoke return hole 11, the smoke collecting chamber 10 and the smoke return pipe 14, and is mixed with the air flowing in through the oxygen collecting pipe 15. It then flows back to the combustion chamber 2 through the smoke outlet pipe 16, and is fully burned in the combustion chamber 2. After the smoke is fully burned, the smoke return fan 13 stops working, and the hot gas generated by the combustion enters the heat exchange chamber 18, and after being guided by the conical guide plate 21, it contacts the heat exchange tube 19 on the side wall of the heat exchange chamber 18, transfers heat to the medium in the heat exchange tube 19, and finally the hot gas is discharged from the furnace body 1 through the exhaust pipe 20.

[0021] It should be noted that the above embodiments are only specific and clear descriptions of the technical solutions and technical features of the present application. For those skilled in the art, solutions or features that belong to the prior art or common knowledge will not be described in detail in the above embodiments.

[0022] In addition, the technical solutions of the present application are not limited to the above-mentioned embodiments. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A biomass particle catalytic combustion smokeless stove, comprising a stove body (1), a combustion chamber (2) provided at the bottom of the stove body (1), and a biomass particle feeding device in communication with the combustion chamber (2) provided on one side of the stove body (1), characterized in that: The furnace body (1) is provided with a conical smoke return port (9) located above the combustion chamber (2), and the furnace body (1) is provided with an oxygen-enhancing smoke return assembly for mixing smoke at the conical smoke return port (9) with air and then re-introducing the smoke into the combustion chamber (2). The combustion chamber (2) is provided with a heat exchange chamber (18) located on the upper side of the conical smoke return port (9), and a heat exchange tube (19) is provided on the inner wall of the heat exchange chamber (18). A smoke exhaust pipe (20) is provided on the top of the furnace body (1), and a conical guide plate (21) is provided at the bottom of the heat exchange chamber (18) for guiding smoke to the heat exchange tube (19).

2. The biomass particle catalytic combustion smokeless stove according to claim 1, characterized in that: The oxygen-enhancing smoke return assembly comprises a smoke-oxygen mixing chamber (12) arranged on the furnace body (1), a smoke collecting chamber (10) is opened on the inner wall of the conical smoke return port (9), the smoke collecting chamber (10) is communicated with the conical smoke return port (9) through a plurality of smoke return holes (11), a smoke return fan (13) is arranged in the smoke-oxygen mixing chamber (12), a smoke return pipe (14) and an oxygen collecting pipe (15) are arranged on the side of the smoke-oxygen mixing chamber (12) close to the air inlet end of the smoke return fan (13), the smoke return pipe (14) is communicated with the smoke collecting chamber (10), the oxygen collecting pipe (15) is communicated with the outside of the furnace body (1) for introducing air, and the side of the smoke-oxygen mixing chamber (12) close to the air outlet end of the smoke return fan (13) is communicated with the combustion chamber (2) through the smoke outlet pipe (16).

3. The biomass particle catalytic combustion smokeless stove according to claim 1, characterized in that: The biomass particle feeding device comprises a particle conveying auger (7) arranged on one side of the furnace body (1); the inlet end of the particle conveying auger (7) is connected to a particle hopper (8); and the outlet end of the particle conveying auger (7) is in communication with the combustion chamber (2).

4. The biomass particle catalytic combustion smokeless stove according to claim 1, characterized in that: The furnace body (1) is provided with an ash area (3) located at the bottom of the combustion chamber (2), a grate (4) is provided between the combustion chamber (2) and the ash area (3), and an igniter (17) is provided on the lower side of the grate (4).

5. The biomass particle catalytic combustion smokeless stove according to claim 1, characterized in that: An oxygen supply machine (5) is provided on one side of the furnace body (1), and the oxygen supply machine (5) is connected to the combustion chamber (2) through an oxygen supply pipe (6).

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