A rotary biomass drying device

Abstract

The utility model discloses a kind of rotary biomass drying device, it is related to biomass drying technical field, including feed bin and the rotary cylinder being communicated with feed bin, multiple rotary cylinder water removal holes are provided on rotary cylinder side wall;Rotary cylinder inside is equipped with rotary rod;Driver is used to drive rotary cylinder and rotary rod rotation;Rotary rod is equipped with the helical blade with hollow structure inside, helical blade is communicated with hot air pipe, for transmission hot air;Recyclable hot air plate is installed on helical blade, hot air plate is communicated with helical blade, ventilation hole is set on hot air plate, for conducting hot air to rotary cylinder inside.The utility model structure is simple and convenient to use, especially suitable for high moisture content biomass drying dehydration treatment.

Description

Technical Field

[0001] This utility model relates to the field of biomass drying technology, and in particular to a rotary biomass drying device. Background Technology

[0002] Biomass refers to a class of materials processed from renewable biomass resources in nature (such as plants, animals, microorganisms, and their metabolic products) through physical, chemical, or biological methods. These materials are characterized by renewability, biodegradability, and environmental friendliness, making them an important alternative to traditional fossil-based materials (such as plastics and rubber).

[0003] Biomass has a wide range of raw material sources, mainly including trees and logging and processing residues, straw and agricultural residues, urban waste (such as sewer sludge, food scraps, packaging materials, construction waste, etc.), and human and animal excrement and organic wastewater.

[0004] Currently, rotary dryers on the market are mainly used in industries such as fertilizer, grain, and chemicals. They generally suffer from problems such as inconvenient material feeding, low thermal efficiency, complex structure, and inconvenience in use. Furthermore, there is a lack of suitable drying devices for biomass with high water content. Utility Model Content

[0005] In order to overcome the defects in the prior art, this utility model provides a rotary biomass drying device with simple structure and easy use, which is especially suitable for drying and dehydrating biomass with high moisture content.

[0006] To achieve the above objectives, the present invention adopts the following technical solution, including:

[0007] A rotary biomass drying device includes: a feed hopper and a rotary drum;

[0008] The feeding hopper is used for feeding biomass materials; the rotary drum is connected to the feeding hopper, and multiple rotary drum dewatering holes are provided on the side wall of the rotary drum;

[0009] The rotary drum is equipped with a rotary rod inside; the driver is used to drive the rotation of the rotary drum and the rotary rod respectively;

[0010] The rotating rod is equipped with a hollow spiral blade, which is connected by a hot air pipe for transmitting hot air. The hot air pipe is connected to a hot air device for providing hot air. Ventilation holes are provided on the spiral blade for conducting hot air into the rotating drum.

[0011] Preferably, a reusable hot air plate is installed on the spiral blades, the hot air plate is connected to the spiral blades, and ventilation holes are set on the hot air plate for conducting hot air into the rotating drum.

[0012] Preferably, the hot air plate is inserted into the spiral blade, and the hot air plate and the spiral blade cooperate with each other to form a smooth integral structure.

[0013] Preferably, it also includes a fixed cylinder; the feed hopper is fixedly connected to the fixed cylinder, and the rotary cylinder is set inside the fixed cylinder; an exhaust hole is provided on the top of the fixed cylinder, and a drain hole and a support column for supporting the fixed cylinder are provided on the bottom of the fixed cylinder.

[0014] Preferably, the rotary drum and the fixed drum are placed at an angle, with the end closer to the feed hopper being higher than the end farther from the feed hopper, and the drain hole is located on the side of the fixed drum farther from the feed hopper.

[0015] Preferably, both the drive unit and the hot air duct are located on the bottom surface of the rotary drum, away from the feed hopper.

[0016] Preferably, both the feed hopper and the rotary drum are equipped with moisture analyzers to measure the moisture content of the biomass materials.

[0017] The advantages of this utility model are:

[0018] (1) The whole structure is simple and easy to use.

[0019] (2) Biomass drying equipment can meet the dehydration needs of different types of biomass. For example, high-moisture biomass can be dehydrated by centrifugal force first, and then dried by hot air to reduce heat energy consumption. For low-moisture biomass, hot air drying can be used directly.

[0020] (3) The structure of the rotating rod and the spiral blade is designed to ensure the material is conveyed, avoid the entanglement of herbaceous biomass in the rotating drum, and have a slight crushing function.

[0021] (4) The hot air plate on the spiral blades is easy to disassemble, install, and maintain. At the same time, ventilation holes are opened on the hot air plate to ensure uniform distribution of hot air. Hot air diffuses directly into the material through the ventilation holes of the spiral blades (or hot air plate). The contact area is much larger than that of the traditional mode of hot air being blown in from the outside of the cylinder. The heat loss is small and the heat transfer coefficient is higher.

[0022] (5) The insert-type hot air plate not only ensures the smoothness of the spiral blade surface (reducing material jamming), but also facilitates later maintenance and replacement (such as when the ventilation hole is blocked, there is no need to replace the entire spiral blade), reducing equipment operation and maintenance costs.

[0023] (6) When the rotary drum rotates at high speed, the water in the material is thrown out through the water removal hole by centrifugal force and collected and discharged directly through the drain hole under the fixed drum, which reduces the moisture load of subsequent hot air drying. It does not need to use hot air to evaporate all the moisture, which greatly reduces the energy consumption of the hot air device.

[0024] (7) The fixed cylinder encloses the rotating cylinder to form a relatively closed space. The exhaust port at the top can collect the wet and hot exhaust gas (containing a small amount of dust) generated during the drying process, which is convenient for subsequent unified treatment (such as dust removal and waste heat recovery) and avoids environmental pollution caused by direct discharge. The drain port at the bottom realizes water and gas separation and simplifies the subsequent treatment process.

[0025] (8) The inclined design of the rotary drum and the fixed drum with the feed end high and the discharge end low, combined with the pushing action of the spiral blades, allows the material to move along the axis by gravity and mechanical force, without the need for an additional feeding mechanism, simplifying the equipment structure and preventing the material from accumulating and stagnating in the drum.

[0026] (9) The drive controls the rotation speed of the rotary drum and the rotary rod separately and independently. The rotation speed can be flexibly adjusted according to the material type (such as fiber or granules) and moisture content (such as increasing the rotation speed of the rotary drum to enhance centrifugal dehydration for materials with high moisture content, and reducing the rotation speed to reduce energy consumption for materials with low moisture content), making it more adaptable.

[0027] (10) The moisture analyzer in the feed hopper and rotary drum collects material moisture content data in real time, which helps to realize closed-loop management of incoming material detection, process adjustment and outgoing material control. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a rotary biomass drying device.

[0029] Figure 2 This is a schematic diagram of the rotary drum structure of a rotary biomass drying device.

[0030] Figure 3 This is a schematic diagram of the material transfer heating device of a rotary biomass drying apparatus.

[0031] Figure 4 This is a schematic diagram of the hot air fin structure of a rotary biomass drying device.

[0032] The annotations in the attached figures are explained as follows:

[0033] 1. Feed hopper; 2. Fixed cylinder; 3. Rotary cylinder; 31. Rotary cylinder dewatering hole; 4. Material transfer heating device; 41. Driver; 42. Hot air pipe; 43. Rotary rod; 44. Spiral blade; 441. Hot air plate; 442. Ventilation hole; 5. Exhaust hole; 6. Drain hole; 7. Support column. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Depend on Figures 1-3 As shown, a rotary biomass drying device includes a feeding hopper 1, a fixed cylinder 2, a rotary cylinder 3, and a material transfer heating device 4.

[0036] Feed hopper 1 is used for feeding biomass materials.

[0037] The feed hopper 1 is fixed to the fixed cylinder 2. The fixed cylinder 2 has an exhaust hole 5 on its upper part and a drain hole 6 and a support column 7 for supporting the fixed cylinder 2 on its lower part. In this embodiment, the feed hopper 1 is fixed to the bottom surface of the left end of the fixed cylinder 2.

[0038] A rotating cylinder 3 is installed inside the fixed cylinder 2. The rotating cylinder 3 is connected to the feed hopper 1. Multiple rotating cylinder dewatering holes 31 are provided on the side wall of the rotating cylinder 3. In this embodiment, the fixed cylinder 2 and the rotating cylinder 3 are placed at an angle, with the end closer to the feed hopper 1 (left end) higher than the end farther from the feed hopper 1 (right end). The drain hole 6 is located below the right end of the fixed cylinder 2, and the vent hole 5 is located above the left end of the fixed cylinder 2.

[0039] The rotary drum 3 is equipped with a rotary rod 43 inside; the driver 41 is used to drive the rotation of the rotary drum 3 and the rotary rod 43 separately and independently. The rotary rod 43 is equipped with a spiral blade 44, which has a hollow internal structure and is connected to the hot air pipe 42 for transmitting hot air; a reusable hot air plate 441 is installed on the spiral blade 44, which is connected to the spiral blade 44 and has ventilation holes 442 for conducting hot air into the rotary drum 3 to dry the biomass material with hot air.

[0040] The drive unit 41, the hot air pipe 42, the rotary rod 43, and the spiral blade 44 constitute the material transfer heating device 4.

[0041] In this embodiment, the driver 41 is disposed on the bottom right end of the rotary drum 3, the rotary rod 43 is located on the central axis of the rotary drum 3, and the hot air pipe 42 is also disposed on the bottom right end of the rotary drum 3. In this embodiment, the hot air plate 441 is inserted into the spiral blade 44, and the hot air plate 441 and the spiral blade 44 cooperate with each other to form a smooth integral structure.

[0042] Hot air is introduced into the hot air duct 42 through an external hot air device.

[0043] Both the feed hopper 1 and the rotary drum 3 are equipped with moisture analyzers to measure the moisture content of the materials.

[0044] The operation of the driver 41, the operation of the hot air device, and the opening degree of the hot air pipe 42 are controlled by the control terminal.

[0045] The drying method of the above-mentioned rotary biomass drying device is shown in detail below:

[0046] S1, after the biomass material falls from the feed hopper 1, the driver 41 is turned on to drive the rotary rod 43 to rotate. Through the operation of the rotary rod 43 and the spiral blade 44, the material is conveyed from the left end to the right end of the rotary drum 3. At the same time, it can prevent herbaceous biomass from getting entangled in the rotary drum and has a slight crushing effect on the biomass material.

[0047] S2, after the material enters the rotary drum 3, the rotary rod 43 stops rotating and the driver 41 is turned on to drive the rotary drum 3 to rotate. Through the high-speed rotation of the rotary drum 3, the water in the material is collected through the water removal hole 31 of the rotary drum and discharged through the drain hole 6 of the fixed drum 2 under the action of centrifugal force, thus realizing the initial dehydration of high water content biomass.

[0048] S3, after the material enters the rotary drum 3 and completes the initial dehydration, the hot air device is turned on. The hot air enters the spiral blade 44 through the hot air pipe 42 and is discharged through the ventilation hole 442 on the hot air plate 411 installed on the spiral blade 44 to dry the material in the rotary drum 3 with hot air.

[0049] S4, the gas generated during the hot air drying process of the material is discharged through the exhaust port 5 of the fixed cylinder 2.

[0050] If the initial moisture content of the biomass material is lower than the set value, then the preliminary dehydration in step S2 is not required, and the hot air drying in step S3 can be carried out directly.

[0051] The initial moisture content of the biomass material can be measured by a moisture analyzer inside the feed hopper 1. The moisture content of the material after hot air drying in the rotary drum 3 can also be measured by a moisture analyzer inside the rotary drum 3, which facilitates the control of the operation of the drive 41, the operation of the hot air device, and the opening of the hot air pipe 42.

[0052] Example 1

[0053] In this embodiment, sludge is used as biomass raw material with an initial moisture content of 60%.

[0054] After the sludge falls from the feed hopper 1, the driver 41 is turned on to drive the rotary rod 43 to rotate. Through the operation of the rotary rod 43 and the spiral blade 44, the material is transferred from the left end to the right end of the rotary drum 3.

[0055] After the material enters the rotary drum 3, the rotary rod 43 stops rotating, and the driver 41 is turned on to drive the rotary drum 3 to rotate. Through the high-speed rotation of the rotary drum 3, the water in the material is collected through the water removal hole 31 of the rotary drum and discharged through the drain hole 6 under the action of centrifugal force, thus achieving the initial dewatering of the sludge.

[0056] After initial dehydration, the hot air device is turned on, and the hot air enters the hot air plate 441 installed on the spiral blade 44 through the hot air pipe 42 on the material transfer heating device 4. The hot air is then discharged from the ventilation hole 442 to further dry the material.

[0057] The gas generated during the drying process is discharged through the exhaust port 5 of the fixed cylinder 2.

[0058] Example 2

[0059] In this embodiment, straw is used as the biomass raw material with an initial moisture content of 15%.

[0060] After the straw falls from the feed hopper 1, the driver 41 is turned on to drive the rotary rod 43 to rotate. Through the operation of the rotary rod 43 and the spiral blade 44, the material is conveyed from the left end to the right end of the rotary drum 3, and the straw is slightly crushed.

[0061] After the material enters the rotary drum 3, the rotary rod 43 stops rotating, the hot air device is turned on, and the hot air enters the hot air plate 441 installed on the spiral blade 44 through the hot air pipe 42 on the material transfer heating device 4. The hot air is then discharged from the ventilation hole 442 to further dry the material.

[0062] The gas generated during the drying process is discharged through the exhaust port 5 of the fixed cylinder 2.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotary biomass drying device, characterized in that, include: Feed hopper (1), rotary drum (3); The feeding hopper (1) is used for feeding biomass materials; the rotary drum (3) is connected to the feeding hopper (1), and multiple rotary drum dewatering holes (31) are provided on the side wall of the rotary drum (3); The rotary drum (3) is equipped with a rotary rod (43) inside; the driver (41) is used to drive the rotation of the rotary drum (3) and the rotary rod (43) respectively; The rotating rod (43) is provided with a spiral blade (44) with a hollow internal structure. The spiral blade (44) is connected through a hot air pipe (42) for transmitting hot air. The hot air pipe (42) is connected to a hot air device for providing hot air. The spiral blade (44) is provided with a ventilation hole (442) for conducting hot air into the rotating drum (3).

2. The rotary biomass drying device according to claim 1, characterized in that, A reusable hot air plate (441) is installed on the spiral blade (44). The hot air plate (441) is connected to the spiral blade (44). A ventilation hole (442) is set on the hot air plate (441) to conduct hot air into the rotary drum (3).

3. The rotary biomass drying device according to claim 2, characterized in that, The hot air plate (441) is inserted into the spiral blade (44), and the hot air plate (441) and the spiral blade (44) cooperate with each other to form a smooth integral structure.

4. The rotary biomass drying device according to claim 1, characterized in that, It also includes a fixed cylinder (2); the feed hopper (1) is fixedly connected to the fixed cylinder (2), and the rotary cylinder (3) is set inside the fixed cylinder (2); an exhaust hole (5) is opened above the fixed cylinder (2), and a drain hole (6) and a support column (7) for supporting the fixed cylinder (2) are set below the fixed cylinder (2).

5. A rotary biomass drying device according to claim 4, characterized in that, The rotary drum (3) and the fixed drum (2) are placed at an angle, with the end closer to the feed hopper (1) higher than the end farther away from the feed hopper (1), and the drain hole (6) is located on the side of the fixed drum (2) away from the feed hopper (1).

6. A rotary biomass drying device according to claim 1, characterized in that, The drive (41) and the hot air duct (42) are both located on the bottom surface of the rotary drum (3) away from the feed hopper (1).

7. The rotary biomass drying device according to claim 1, characterized in that, Moisture analyzers are installed in both the feed hopper (1) and the rotary drum (3) to measure the moisture content of biomass materials.

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