Large-scale biomass bulk material uniform drying device and system
By setting up a biomass bulk uniform drying system with blanking holes and spiral guide plates in the rotary furnace body, the problem of uneven biomass drying is solved, and an efficient and low-cost biomass drying effect is achieved.
Patent Information
- Application Number
- CN202510640611.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-19
- Publication Date
- 2025-07-22
AI Technical Summary
The existing biomass drying technology cannot effectively control the drying uniformity of biomass raw materials of different particle sizes, resulting in low drying efficiency, high cost, and prone to the problems of carbonization of small particles or insufficient drying of large particles.
A large-scale biomass bulk uniform drying system is designed, and a chamber structure with blanking holes is installed in the rotary furnace, combined with a spiral deflector and a temperature and humidity regulator, the particle drying time is controlled through the size difference of the blanking holes, and the heat flow distribution is optimized to achieve uniform drying of biomass particles.
Achieve continuous drying of biomass particles in a single drying device, improve drying efficiency and quality consistency, reduce carbonization, and reduce energy consumption and labor costs.
Smart Images
Figure CN120351728A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of biomass, and in particular to a large-scale biomass bulk material uniform drying system. Background Art
[0002] As a renewable energy source, biomass has gradually become an important source to replace traditional fossil energy. The development and utilization of biomass energy, especially the production and application of biomass fuel, has become an important development direction in the energy field. In the context of abundant biomass resources in my country, especially in the processing of biomass raw materials such as agricultural waste, forestry residues and livestock and poultry manure, it is usually necessary to dry the biomass to improve the utilization rate and quality of biomass and reduce energy waste. The drying of biomass raw materials is a key step in the biomass energy conversion process, which directly affects the combustion efficiency, calorific value and subsequent processing and utilization of biomass.
[0003] However, in the actual biomass drying process, since the control method of the biomass drying degree mainly relies on temperature and drying time, the differences in the size of biomass particles cannot be taken into account. As a result, when drying biomass raw materials with large differences in particle size, larger particles will be dried unevenly, while small particles may be directly carbonized, which is not conducive to the conversion and utilization of biomass energy.
[0004] Specifically, in the drying process, there are inevitably differences in particle sizes in the same batch of biomass pellets, and there are also differences in particle sizes between different biomass varieties. Therefore, in actual industrial production, the differences in biomass particle sizes lead to a huge contradiction between the uniformity of biomass drying quality, drying efficiency and drying cost.
[0005] In order to ensure the consistency of drying quality, it is often necessary to screen the particle size in advance and then dry the biomass raw materials of different particle sizes separately. At this time, in order to meet the drying efficiency, it may be necessary to purchase multiple drying furnaces for simultaneous drying. However, this drying method has too high drying costs, which is not conducive to the price of the final biomass derivative products.
[0006] Alternatively, a drying furnace may be used to dry the biomass of different particle sizes screened out in batches. However, this makes the drying process intermittent, which not only reduces the efficiency of the drying process, but also adds multiple labor costs to the process, thereby indirectly increasing the drying cost and is not conducive to the price of the final biomass-derived products. Summary of the invention
[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a large-scale biomass bulk material uniform drying system.
[0008] A large-scale biomass bulk material uniform drying device according to an embodiment of the present invention includes:
[0009] A feed box, a rotary furnace body, and a discharge box. The two ends of the rotary furnace body are dynamically and hermetically connected to the feed box and the discharge box respectively. One end of the rotary furnace body close to the feed box is higher than one end of the discharge box. The air outlet is communicated with the rotary furnace body. The rotary furnace body includes an inner furnace body and an outer furnace body. The outer furnace body is sleeved outside the inner furnace body, and a chamber is provided between the outer furnace body and the inner furnace body. The side wall of the inner furnace body is distributed with material dropping holes, and the aperture of the material dropping holes gradually becomes larger from the side of the feed box to the side of the discharge box.
[0010] In some embodiments of the present invention, the drying device further includes: a spiral guide plate, and the spiral guide plate is arranged on the inner side wall of the inner furnace body.
[0011] In some embodiments of the present invention, the spiral guide plate is distributed with first ventilation holes.
[0012] In some embodiments of the present invention, the material dropping holes include straight holes and inclined holes. The straight holes and the inclined holes are arranged alternately. The included angle between the axis of the inclined hole and the axis of the inner furnace body is A, where 45° < A < 90°.
[0013] In some embodiments of the present invention, the discharge box is provided with an exhaust port, and the exhaust port is communicated with the chamber to make the temperature of the chamber lower than the temperature of the inner furnace body.
[0014] In some embodiments of the present invention, the uniform drying device further includes: a temperature and humidity regulator. One end of the temperature and humidity regulator is communicated with the exhaust port, and the other end is communicated with the chamber.
[0015] In some embodiments of the present invention, the uniform drying device further includes: a spray pipe. The spray pipe is arranged inside the inner furnace body and extends along the axial direction of the inner furnace body. The inner diameter of the spray pipe gradually becomes larger from the side of the feed box to the side of the discharge box.
[0016] In some embodiments of the present invention, the pipe body of the spray pipe is distributed with second ventilation holes, and the aperture of the second ventilation holes gradually becomes larger from the side of the feed box to the side of the discharge box.
[0017] A large-scale biomass bulk material uniform drying system according to the second embodiment of the present invention includes:
[0018] A combustion furnace, and an air outlet is provided on the side wall of the combustion furnace;
[0019] A drying furnace, the drying furnace adopts a large-scale biomass bulk material uniform drying device as described in any one of claims 1 to 8, and the air outlet is communicated with the rotary furnace body;
[0020] A hopper, the hopper is communicated with the drying furnace.
[0021] Beneficial effects:
[0022] In the present invention, a chamber structure with a material dropping hole is arranged on the rotary furnace body, so as to passively control the drying time of biomass particles of different sizes by using the size of the material dropping hole, and further, continuous drying of biomass in a single drying device can be realized, which not only greatly improves the efficiency of biomass drying, but also improves the consistency of biomass drying quality. Description of the drawings
[0023] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:
[0024] Figure 1 is a schematic diagram of a large-scale biomass bulk material uniform drying system according to an embodiment of the present invention;
[0025] Figure 2 is a three-dimensional structure schematic diagram of a rotary furnace body according to an embodiment of the present invention;
[0026] Figure 3 is a sectional structure schematic diagram of an inner furnace body according to an embodiment of the present invention;
[0027] Figure 4 is a structure schematic diagram of a material dropping hole according to an embodiment of the present invention.
[0028] Reference numerals:
[0029] 100. Large-scale biomass bulk material uniform drying system;
[0030] 10. Large-scale biomass bulk material uniform drying device;
[0031] 11. Feed box; 12. Rotary furnace body; 121. Inner furnace body; 122. Outer furnace body; 123. Chamber; 13. Discharge box; 131. Exhaust port; 2. Material dropping hole; 21. Straight hole; 22. Inclined hole; 3. Spiral guide plate; 31. First ventilation hole; 4. Temperature and humidity regulator; 5. Spray pipe; 51. Second ventilation hole; 6. Combustion furnace; 61. Air outlet; 7. Hopper. Detailed implementation manners
[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure in conjunction with the accompanying drawings in the disclosed embodiments of the present application. The description of the embodiments is actually only illustrative and exemplary, and does not constitute any limitation to the present disclosure and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure. In addition, technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.
[0033] Combined with Figures 1 to 4 As shown, a large-scale biomass bulk material uniform drying device 10 according to an embodiment of the present invention at least includes: a feed box 11, a rotary furnace body 12, and a discharge box 13. The two ends of the rotary furnace body 12 are dynamically and hermetically connected to the feed box 11 and the discharge box 13 respectively. One side of the rotary furnace body 12 close to the feed box 11 is higher than one side of the discharge box 13. The rotary furnace body 12 includes an inner furnace body 121 and an outer furnace body 122. The outer furnace body 122 is sleeved outside the inner furnace body 121, and a chamber 123 is provided between the outer furnace body 122 and the inner furnace body 121. Discharge holes 2 are distributed on the side wall of the inner furnace body 121, and the aperture of the discharge holes 2 gradually becomes larger from the side of the feed box 11 to the side of the discharge box 13.
[0034] More specifically, when biomass with a large difference in particle size enters the drying device, under the rotation of the rotary furnace body 12, the biomass continuously flips in the inner furnace body 121. At this time, some small-sized biomass can enter the chamber 123 through the discharge holes 2. Since the entire rotary furnace body 12 is in an inclined state, the small-sized biomass falling into the chamber 123 can quickly and smoothly move towards the side of the discharge box 13 until it enters the discharge box 13 and leaves through the discharge port at the bottom. During this process, the biomass particles larger than the size of the discharge holes 2 will still flip forward in the inner furnace body 121 until they move to a position where the size of the discharge holes 2 is larger than the size of the biomass particles, and then fall into the chamber 123.
[0035] In this way, after the smaller-sized biomass particles enter the chamber 123 through the discharge holes 2, they will quickly slide out of the chamber 123 and leave the drying device, which can greatly shorten the drying time of the smaller particle biomass in the rotary furnace body 12, thereby indirectly playing a role in controlling the drying time of the small particle biomass and avoiding the carbonization problem caused by over-drying. At the same time, the larger-sized biomass particles have a larger volume and require a longer drying time. In this way, the larger-sized biomass cannot enter the chamber 123 through the small-sized discharge holes 2, thus ensuring sufficient drying time. And at the discharge holes 2 with appropriate apertures, the larger-sized biomass particles will also quickly slide after falling into the chamber 123, avoiding the problem of carbonization due to too long drying time.
[0036] Thus, by providing a chamber 123 structure with a blanking hole 2 on the rotary furnace body 12, the present invention passively controls the drying time of biomass particles of different sizes by using the size of the blanking hole 2, and can continuously dry biomass in a single drying device, which not only greatly improves the efficiency of biomass drying, but also improves the consistency of biomass drying quality.
[0037] Further, on the basis of the above embodiments, as Figure 2 and Figure 3 shown, a spiral guide plate 3 is provided on the inner side wall of the inner furnace body 121. In this way, when the biomass particles move in the inner furnace body 121, the spiral guide plate 3 can be used to improve the turning effect of the biomass particles, which is beneficial to increasing the contact area between the biomass particles and heat, and improving the drying efficiency.
[0038] At the same time, since the entire rotary furnace body 12 is in an inclined state, the biomass particles are more likely to move toward the discharge box 13. Therefore, the spiral guide plate 3 can slow down the moving speed of the biomass particles toward the discharge box 13, avoiding the situation that the flow speed of the biomass particles is too fast, resulting in insufficient drying time and affecting the drying effect.
[0039] Preferably, the spiral guide plate 3 is distributed with first vent holes 31. In this way, the first vent holes 31 can be used to promote the forward flow of high-temperature air, improve the drying efficiency of large-particle biomass in the middle and rear sections of the rotary furnace body 12, so as to ensure that the large-particle biomass can be fully dried; at the same time, it can also reduce the mass of the spiral guide plate 3 to a certain extent, which is beneficial to saving the energy consumption during the rotation of the drying device.
[0040] In some embodiments of the present invention, as Figure 4 shown, the blanking hole 2 includes a straight hole 21 and an inclined hole 22, and the straight hole 21 and the inclined hole 22 are arranged in an alternating manner. Among them, the axis of the straight hole 21 is perpendicular to the side wall of the inner furnace body 121, and the axis of the inclined hole 22 forms an acute angle with the axis of the rotary furnace body 12 and faces the discharge box 13 side, and the angle range is 45° to 90°, so as to avoid the blockage caused by too large an inclination angle of the inclined hole 22.
[0041] During use, after the biomass particles fall into the chamber 123, some high-temperature air will also enter the chamber 123 through the blanking hole 2. At this time, under the action of the air flow blown into the chamber 123 through the inclined hole 22, the biomass particles are pushed to accelerate and move toward the discharge box 13 side, thereby reducing the residence time of the biomass particles in the chamber 123, and at the same time, it can also prevent the biomass particles from "staying" in the chamber 123.
[0042] In some embodiments of the present invention, as Figure 1As shown, the discharge box 13 is provided with an exhaust port 131. During use, the exhaust port 131 can be communicated with the chamber 123 on the side close to the feed box 11, so that the temperature of the chamber 123 can be lower than that of the inner furnace body 121. Specifically, the hot and humid air formed after the biomass particles are dried will be discharged from the exhaust port 131, and then part of the hot and humid air is extracted and blown into the chamber 123 again, especially at the chamber 123 on the side close to the feed box 11. In this way, this part of the air flow will flow from one side of the chamber 123 to the other side. After leaving from the air outlet 61, the new hot and humid air will enter the chamber 123 again, and so on in a cycle.
[0043] During this process, the flow of the hot and humid air in the chamber 123 can form a temperature field, which will be lower than the temperature field of the inner furnace body 121. In this way, after the small-sized biomass particles enter the chamber 123 through the blanking hole 2, this lower temperature field can reduce the thermal radiation of the high temperature of the inner furnace body 121 to the chamber 123 and relieve the continuous influence of the temperature of the inner furnace body 121 on the biomass particles in the chamber 123.
[0044] Preferably, the large-scale biomass bulk uniform drying device further includes a temperature and humidity regulator 4. During use, one end of the temperature and humidity regulator 4 is communicated with the exhaust port 131, and the other end is communicated with the chamber 123. In this way, the warm and humid air discharged from the exhaust port 131 can enter the chamber 123 after being adjusted by the temperature and humidity regulator 4, so as to accurately control the temperature and humidity, and ensure that the air flow maintains suitable temperature and humidity conditions during the recycling use.
[0045] In some embodiments of the present invention, as Figure 1 shown, it further includes a spray pipe 5. The spray pipe 5 is arranged in the inner furnace body 121 and extends along the axial direction of the inner furnace body 121. The extended length can be determined according to the length of the rotary furnace body 12, but it is necessary to make the suspended end of the spray pipe 5 as close as possible to the middle of the inner furnace body 121, which is beneficial to the diffusion of the high-temperature air to the side of the discharge box 13 and improves the drying effect on the larger-sized particulate biomass. Preferably, the inner diameter of the spray pipe 5 gradually increases from the side of the feed box 11 to the side of the discharge box 13, so that the high-temperature air flow ejected from the nozzle of the spray pipe 5 can be slowed down by using the horn-shaped structure, and the uniform distribution effect of the high-temperature air in the rotary furnace body 12 is improved.
[0046] At the same time, the pipe body of the spray pipe 5 is also distributed with second vent holes 51, and the aperture of the second vent holes 51 gradually increases from the side of the feed box 11 to the side of the discharge box 13, which can effectively prevent the high-temperature drying air flow from causing excessive drying or carbonization to the area close to the side of the feed box 11 when entering the inner furnace body 121.
[0047] Embodiment 2
[0048] A large-scale biomass bulk material uniform drying system 100 according to an embodiment of the present invention at least includes: a combustion furnace 6, a drying furnace, and a hopper 7. Among them, the drying furnace adopts the structure of the large-scale biomass bulk material uniform drying device of the above solution. An air outlet 61 is provided on the side wall of the combustion furnace 6, and the air outlet 61 is communicated with the rotary furnace body 12, and the hopper 7 is communicated with the drying furnace.
[0049] During use, the hopper 7 is communicated with the drying furnace so that biomass can continuously enter the drying furnace. At the same time, an air outlet 61 is provided on the side wall of the combustion furnace 6, and the air outlet 61 is communicated with the rotary furnace body 12 so that high-temperature gas can be introduced into the drying furnace to dry the biomass.
[0050] In this way, by optimizing key technologies such as the heat flow distribution and multi-scale particle drying uniformity during the drying process, the drying effect is significantly improved, the phenomena of particle carbonization and uneven drying are reduced, and thus the overall efficiency of biomass drying and the quality of derivative products are improved.
[0051] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.
[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.
[0053] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A large-scale biomass bulk material uniform drying device, characterized in that, Comprising: A feed box, a rotary furnace body, and a discharge box. The two ends of the rotary furnace body are respectively dynamically and sealingly connected to the feed box and the discharge box. One end of the rotary furnace body close to the feed box is higher than one end of the discharge box. The gas outlet is communicated with the rotary furnace body. The rotary furnace body includes an inner furnace body and an outer furnace body. The outer furnace body is sleeved outside the inner furnace body, and a chamber is provided between the outer furnace body and the inner furnace body. Material dropping holes are distributed on the side wall of the inner furnace body, and the aperture of the material dropping holes gradually increases from the side of the feed box to the side of the discharge box.
2. A large-scale biomass bulk material uniform drying device according to claim 1, characterized in that, Further comprising: A spiral guide plate, which is arranged on the inner side wall of the inner furnace body.
3. The large biomass bulk material uniform drying device according to claim 2, characterized in that, First ventilation holes are distributed on the spiral guide plate.
4. A large-scale biomass bulk material uniform drying device according to any one of claims 1 to 3, characterized in that, The material dropping holes include straight holes and inclined holes. The straight holes and the inclined holes are arranged alternately. The included angle between the axis of the inclined hole and the axis of the inner furnace body is A, where 45° < A < 90°.
5. A large-scale biomass bulk material uniform drying device according to any one of claims 1 to 3, characterized in that, An exhaust port is provided on the discharge box, and the exhaust port is communicated with the chamber to make the temperature of the chamber lower than the temperature of the inner furnace body.
6. The large biomass bulk material uniform drying device according to claim 5, wherein Further comprising: A temperature and humidity regulator, one end of which is communicated with the exhaust port and the other end is communicated with the chamber.
7. A large-scale biomass bulk material uniform drying device according to claim 1, characterized in that, Further comprising: A spray pipe, which is arranged inside the inner furnace body and extends along the axial direction of the inner furnace body. The inner diameter of the spray pipe gradually increases from the side of the feed box to the side of the discharge box.
8. A large-scale biomass bulk material uniform drying device according to claim 6, characterized in that, Second ventilation holes are distributed on the pipe body of the spray pipe, and the aperture of the second ventilation holes gradually increases from the side of the feed box to the side of the discharge box.
9. A large-scale biomass bulk material uniform drying system, characterized in that, Comprising: A combustion furnace, on the side wall of which there is a gas outlet; A drying furnace, which adopts a large-scale biomass bulk material uniform drying device as described in any one of claims 1 to 8. The gas outlet is communicated with the rotary furnace body; A hopper, which is communicated with the drying furnace.