Biomass powder conveying device
By combining a rotary feeder with an ejector, along with an air distribution mechanism and a Roots blower, the problems of poor sealing and difficult feeding during the biomass powder conveying process are solved, achieving efficient and reliable biomass powder conveying.
Patent Information
- Application Number
- CN202422924896.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing technologies for conveying biomass powder suffer from problems such as poor sealing of the gas-solid interface, air ingress into the silo, and difficulty in material discharge due to air resistance, making it difficult to achieve efficient and reliable conveying.
By combining a rotary feeder with an ejector, along with an air distribution mechanism and a Roots blower, and through the design of nozzles, suction chambers, and diffusers, the powder is supported by negative pressure zones and compressed air to prevent sedimentation, thus achieving efficient and reliable conveying.
It effectively avoids the problems of poor sealing at the gas-solid interface and difficulty in feeding, and achieves efficient and reliable transportation of biomass powder.
Smart Images
Figure CN223560756U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of biomass blending combustion utilization, especially relates to a biomass powder conveying device. BACKGROUND
[0002] Biomass refers to all kinds of organisms formed by photosynthesis, including all plants and animals and microorganisms. At present, the biomass broken powder conveying device coupled with the direct combustion furnace of large coal-fired unit generally utilizes rotating equipment to transport biomass powder from the stock bin to the pneumatic conveying pipeline, adopts positive pressure pneumatic conveying, and the pressure of positive pressure pneumatic conveying can reach ten kPa or even dozens of kPa. At this time, if the gap between the rotating equipment and the stock bin shell is small, the material collision shell and jamming problems can be caused, and if the gap is large, the gas-solid interface sealing is not strict, the stock bin air inlet, the wind against the material and the difficult discharging problems can be caused, and the efficient and reliable conveying of biomass powder is difficult to realize. UTILITY MODEL CONTENTS
[0003] The technical problem to be solved by the utility model is how to realize the efficient and reliable conveying of biomass powder.
[0004] The utility model is realized by the following technical means to solve the above technical problem: a biomass powder conveying device, including a stock bin, a rotary feeder, a jet device, a fan and a pneumatic conveying pipeline, the jet device includes a nozzle, a suction chamber and a diffuser pipe which are sequentially communicated, the stock bin is connected with the suction chamber, the rotary feeder is arranged between the stock bin and the suction chamber, the fan is connected with the nozzle, and the pneumatic conveying pipeline is connected with the diffuser pipe.
[0005] As an optimization technical scheme, the biomass powder conveying device further includes a wind distribution mechanism, the wind distribution mechanism is arranged at the bottom of the suction chamber, the top of the wind distribution mechanism is communicated with the suction chamber through a plurality of air inlet holes, and a compressed air source is connected with the wind distribution mechanism through a pipeline.
[0006] As an optimization technical scheme, the wind distribution mechanism is a cuboid box structure.
[0007] As an optimization technical scheme, the air inlet holes are uniformly distributed.
[0008] As an optimization technical scheme, the stock bin is a funnel structure with large upper part and small lower part, and the stock bin is fixedly connected with the top of the suction chamber.
[0009] As an optimization technical scheme, the fan is a Roots blower.
[0010] The utility model has the advantages of the following:
[0011] 1. By combining a rotary feeder with an ejector, efficient and reliable conveying of biomass powder is achieved, avoiding problems such as poor sealing of the gas-solid interface, air ingress into the hopper, and material obstruction caused by airflow when conveying with a single rotary feeder, which leads to difficulties in material discharge.
[0012] 2. Compressed air supplied by the compressed air source enters the air distribution mechanism and is blown out through the air inlet, which can hold the biomass powder in the intake chamber and prevent the biomass powder from settling. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of the biomass powder conveying device according to an embodiment of the present invention. Detailed Implementation
[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0015] like Figure 1 As shown in the figure, this utility model embodiment discloses a biomass powder conveying device, including a hopper 1, a rotary feeder 2, an ejector 3, a blower 4, an air distribution mechanism 5, and a pneumatic conveying pipeline 6.
[0016] The jet ejector 3 includes a nozzle 31, a suction chamber 32, and a diffuser 33 connected in sequence. The jet ejector 3 is an existing device and has various forms. This embodiment does not limit the structural form of the jet ejector 3. The working principle of the jet ejector is as follows: when the working fluid with a certain pressure is ejected at high speed through the nozzle 31, the pressure energy is converted into velocity energy, and a negative pressure area is formed in the outlet area of the nozzle 31. This negative pressure area will attract the pumped medium into the suction chamber 32. In the diffuser 33, the working fluid and the pumped medium are mixed and exchange energy. The velocity energy is gradually reduced back to pressure energy. Finally, the mixed working fluid and the pumped medium are discharged at a pressure higher than atmospheric pressure.
[0017] The bin 1 is connected with the suction chamber 32, and a rotary feeder 2 is arranged between the bin 1 and the suction chamber 32, and the biomass powder is sent to the suction chamber 32 through the rotary feeder 2, and the negative pressure area formed by the jet device 3 in the suction chamber 32 guarantees smooth feeding; the bin 1 is a funnel structure with large top and small bottom, and the bin 1 is fixedly connected to the top of the suction chamber 32; the fan 3 is a Roots blower, the fan 3 is connected with the nozzle 31, and the fan 3 is used for providing working gas for the jet device 2; the pneumatic conveying pipeline 5 is connected with the diffuser 33, the biomass powder is accelerated and sprayed into the pneumatic conveying pipeline 6 through the jet device 3, and efficient and reliable conveying of the biomass powder is realized; the air distribution mechanism 5 is a cuboid box structure, the air distribution mechanism 5 is arranged at the bottom of the suction chamber 32, the top of the air distribution mechanism 5 is communicated with the suction chamber 32 through a plurality of evenly distributed air inlet holes, and the air distribution mechanism 5 is connected with a compressed air source through a pipeline; compressed air provided by the compressed air source is blown out from the air inlet holes after entering the air distribution mechanism 5, the biomass powder in the suction chamber 32 can be supported, and deposition of the biomass powder is prevented.
[0018] Working principle: the combination of the rotary feeder 2 and the jet device 3 realizes efficient and reliable conveying of the biomass powder, avoids problems such as that the gas-solid interface is not tightly sealed during conveying by a single rotary feeder, air enters the bin, air pushes against the material, and the material is difficult to be fed, and the device is suitable for wood powder, the particle size of which is not more than 5 mm, and the particle size of straw powder is not more than 3 mm, so as to prevent insufficient power.
[0019] The above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A biomass powder delivery device, characterized by: The biomass powder conveying device comprises a stock bin, a rotary feeder, a jet device, a fan and a pneumatic conveying pipeline, the jet device comprises a nozzle, a suction chamber and a diffuser in sequence, the stock bin is connected with the suction chamber, the rotary feeder is arranged between the stock bin and the suction chamber, the fan is connected with the nozzle, and the pneumatic conveying pipeline is connected with the diffuser.
2. The biomass powder delivery apparatus according to claim 1, wherein: The biomass powder conveying device further comprises an air distribution mechanism, the air distribution mechanism is arranged at the bottom of the suction chamber, the top of the air distribution mechanism is communicated with the suction chamber through a plurality of air inlet holes, and a compressed air source is connected with the air distribution mechanism through a pipeline.
3. The biomass powder delivery apparatus of claim 2, wherein: The air distribution mechanism is a cuboid box structure.
4. The biomass powder delivery apparatus of claim 2, wherein: The air inlet holes are uniformly distributed.
5. The biomass powder delivery apparatus of claim 1, wherein: The stock bin is a funnel structure which is large at the top and small at the bottom, and the stock bin is fixedly connected to the top of the suction chamber.
6. The biomass powder delivery apparatus of claim 1, wherein: The fan is a Roots fan.