A double screw dewatering device

Abstract

The application belongs to the technical field of material dehydration, and discloses a double-spiral dehydration device. The device comprises a transmission component, a compression component, a drainage component and a feeding component. The feeding component feeds material into the compression component. The lower side of the compression component is provided with the drainage component, which drains water squeezed out of the compression component. First and second spiral screws in the compression component are installed in a screw chamber. The screw chamber is sequentially divided into a feeding section, a dehydration section and a discharging section. The outer side of the first spiral screw is wound with first spiral blades, and the outer side of the second spiral screw is wound with second spiral blades. The pitch between the spiral blades gradually shortens. The transmission component drives the first and second spiral screws to rotate. The device solves the problem of poor material extrusion effect of the prior art, which leads to insufficient dehydration rate of the final material.

Description

Technical Field

[0001] This invention relates to the field of material dehydration technology, and in particular to a double-helix dehydration device. Background Technology

[0002] Biomass materials typically contain a large amount of moisture during processing. Dehydration is a crucial step in biomass processing, and the moisture content of the materials has a significant impact on the processing efficiency and operating costs of subsequent processes. Therefore, effectively reducing the moisture content of materials and developing cost-effective dehydration technologies are currently the focus of research in material processing.

[0003] Currently, deep dehydration mainly relies on thermal dehydration, the core principle of which is drying. This requires using flue gas, steam, or other heat sources to heat the material, causing moisture to evaporate and achieving dehydration. Common equipment based on thermal dehydration technology includes vertical fluidized bed dryers, vibrating fluidized beds, disc dryers, dedicated spray dryers, multi-layer belt dryers, and hollow paddle dryers. While these devices can improve dehydration efficiency and achieve deep dehydration, they require high levels of electricity to maintain the high temperature of the heat source, resulting in very high energy consumption. Existing technology uses screw extrusion for dehydration, which can save energy; however, the single-screw structure exerts relatively low extrusion pressure on the material, leading to poor final dehydration and insufficient dehydration rate. Summary of the Invention

[0004] The purpose of this invention is to provide a double-helix dewatering device that solves the problem that the compression effect of the material using the existing helix dewatering technology is poor, resulting in insufficient dewatering rate of the final material.

[0005] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a double helix dewatering device, including a transmission component, a compression component, a drainage component and a feeding component. The feeding component conveys material into the compression component, and the drainage component is installed on the lower side of the compression component to discharge the water squeezed out by the compression component.

[0006] The compression component includes a first spiral screw, a second spiral screw, and a pressing chamber. The first and second spiral screws are installed inside the pressing chamber, which is divided into a feeding section, a dewatering section, and a discharging section. A first spiral blade is wound around the outside of the first spiral screw, and a second spiral blade is wound around the outside of the second spiral screw. In the dewatering section and the discharging section, the first and second spiral blades are symmetrically placed along the length of the pressing chamber. The pitch between the spiral blades gradually decreases along the direction from the feeding section to the discharging section. The transmission component drives the first and second spiral screws to rotate.

[0007] Preferably, the first spiral screw includes a first column with the first spiral blade wound around its outer side, and the second spiral screw includes a second column with the second spiral blade wound around its outer side. The diameters of the first column and the second column gradually increase along the direction from the feeding section to the unloading section.

[0008] Preferably, within the dehydration section, both the first column and the second column are fitted with protrusions.

[0009] Preferably, the protrusion is conical, and the diameter of the protrusion on the side closer to the unloading section is larger than the diameter of the protrusion on the side farther from the unloading section.

[0010] Preferably, the pressing chamber is in contact with the first spiral blade and the second spiral blade, and the pressing chamber is a wire gap filter.

[0011] Preferably, the feeding component includes a feeder, a horizontal feeder, and a vertical feeder. The feeder is connected to the horizontal feeder, the end of the horizontal feeder is connected to the vertical feeder, and the lower end of the vertical feeder is connected to the pressing chamber. A horizontal stud is installed inside the horizontal feeder, and a horizontal motor drives the horizontal stud to rotate. A vertical stud is installed inside the vertical feeder, and a vertical motor drives the vertical stud to rotate. The vertical stud is perpendicular to the horizontal plane.

[0012] Preferably, the transmission component includes a main motor and a reducer, the main motor being drivenly connected to the reducer, and the reducer being rotatably connected to the first screw press and the second screw press respectively.

[0013] Preferably, within the feeding section, the first spiral blade and the second spiral blade are staggered.

[0014] Preferably, the drainage component includes a drainage groove and a drainage stud, the drainage stud is installed in the drainage groove, the main motor drives the drainage stud to rotate, and the drainage groove is installed on the lower side of the pressing chamber.

[0015] Beneficial effects: The material is conveyed into the pressing chamber through the feeding component. Under the push of the first and second spiral blades, the material moves along the feeding section, dewatering section, and discharge section. As the pitch of the first and second spiral blades continuously decreases, the space between adjacent blades of the first spiral blade is compressed. Similarly, the space between adjacent blades of the second spiral blade is squeezed. The farther the material is conveyed in the pressing chamber, the higher the pressure of the material and the greater the dewatering. At the same time, since the first and second spiral blades are symmetrically placed and rotate synchronously, the material between the first spiral blades will also squeeze the material in the corresponding second spiral blade. The mutual squeezing of the materials makes the dewatering more sufficient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the double-helix dehydration device of the present invention;

[0017] Figure 2 This is a diagram of the main body of the compression component of the present invention;

[0018] Figure 3 This is a diagram of the main body of the pressing chamber of the present invention.

[0019] In the diagram: 1. Feeding section; 2. Dewatering section; 3. Discharge section; 4. First spiral screw; 41. First spiral blade; 42. First column; 5. Second spiral screw; 51. Second spiral blade; 52. Second column; 6. Pressing chamber; 7. Protrusion; 8. Feeder; 9. Horizontal feeder; 91. Horizontal stud; 92. Horizontal motor; 10. Vertical feeder; 101. Vertical motor; 102. Vertical stud; 20. Main motor; 30. Reducer; 40. Drainage stud; 50. Drainage trough. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0024] Under current technology, thermal dehydration consumes a lot of energy, which wastes electricity. At the same time, using a single screw to squeeze the material results in insufficient pressure, leading to low dehydration efficiency.

[0025] To solve the above problems, such as Figures 1 to 3 As shown, the present invention provides a double-helix dewatering device, including a transmission component, a compression component, a drainage component and a feeding component. The feeding component conveys material into the compression component, and a drainage component is installed on the lower side of the compression component to discharge the water and material residue squeezed out by the compression component.

[0026] The compression component includes a first spiral screw 4, a second spiral screw 5, and a pressing chamber 6. The first spiral screw 4 and the second spiral screw 5 are installed inside the pressing chamber 6. The pressing chamber 6 is divided into a feeding section 1, a dewatering section 2, and a discharging section 3 along its length, wherein the feeding section 1, the dewatering section 2, and the discharging section 3 are connected in sequence.

[0027] The first spiral screw 4 has a first spiral blade 41 wound around its outer side, and the second spiral screw 5 has a second spiral blade 51 wound around its outer side. In the dewatering section 2 and the unloading section 3, the first spiral blade 41 and the second spiral blade 51 are symmetrically placed along the length of the pressing chamber 6. This is called a non-meshing, opposite-direction combination spiral. Along the direction from the feeding section 1 to the unloading section 3, the pitch between the spiral blades gradually shortens. The transmission component drives the first spiral screw 4 and the second spiral screw 5 to rotate.

[0028] The pressing chamber 6 of this invention can only accommodate the first spiral screw 4 and the second spiral screw 5. The first spiral blade 41 and the second spiral blade 51 are closely adjacent to each other. The first spiral screw 4 and the second spiral screw 5 rotate under the drive of the transmission component. The material is transported in the space between the first spiral blade 41 and the space between the second spiral blade 51. As the pitch of the first spiral blade 41 and the second spiral blade 51 gradually shortens on the side closer to the discharge section 3, the space between the first spiral blade 41 becomes smaller, but the original content of the material remains unchanged. The material will be compressed. The same applies to the second spiral blade 51. This will further compress the material, thereby squeezing out more water and making the dehydration rate higher. The material between the first spiral blade 41 will also squeeze the material between the second spiral blade 51. The mutual squeezing of the materials further squeezes out the water, making the dehydration rate of the material higher.

[0029] The first spiral screw 4 includes a first column 42, with a first spiral blade 41 wound around the outside of the first column 42. The second spiral screw 5 includes a second column 52, with a second spiral blade 51 wound around the outside of the second column 52. Along the direction from the feeding section 1 to the unloading section 3, the diameters of the first column 42 and the second column 52 gradually increase.

[0030] As the diameters of the first column 42 and the second column 52 increase, the space between the first spiral blade 41 and the second spiral blade 51 is further reduced, which allows the material to be further compressed and the moisture in the material to be further extracted.

[0031] Within the dewatering section 2, protrusions 7 are fitted onto both the first column 42 and the second column 52. These protrusions 7 reduce the space between the material and the spiral blades. The protrusions 7 of this invention are conical, with the diameter of the protrusion 7 near the discharge section 3 being larger than the diameter of the protrusion 7 away from the discharge section 3. This allows the material to be gradually compressed, enabling it to be conveyed forward normally and reducing the resistance to the first column 42 and the second column 52. The space occupied by the protrusions 7 in the dewatering section 2 area is further reduced, allowing the material between the first spiral blade 41 and the second spiral blade 51 to be further squeezed, thereby increasing the dewatering rate. It should be noted that a protrusion 7 is installed between every two sets of blades of each first spiral blade 41, allowing the material to be repeatedly squeezed and dewatered.

[0032] The pressing chamber 6 is in close contact with the first spiral blade 41 and the second spiral blade 51, reducing the internal space of the pressing chamber 6 and further reducing the space left for the material inside the pressing chamber 6, so that the material can be squeezed out more water. The pressing chamber 6 of the present invention is a wire gap filter. The wire gap filter is existing technology, and its structural principle will not be described in detail here. The squeezed water and a small amount of material can flow down along the gap in the wire gap filter and fall into the drainage tank 50 for discharge.

[0033] The feeding component of the present invention includes a feeder 8, a horizontal feeder 9, and a vertical feeder 10. The feeder 8 is connected to the horizontal feeder 9, the end of the horizontal feeder 9 is connected to the vertical feeder 10, and the lower end of the vertical feeder 10 is connected to the pressing chamber 6. A horizontal stud 91 is installed inside the horizontal feeder 9, and a horizontal motor 92 drives the horizontal stud 91 to rotate. A vertical stud 102 is installed inside the vertical feeder 10, and a vertical motor 101 drives the vertical stud 102 to rotate. The vertical stud 102 is perpendicular to the horizontal plane.

[0034] Material containing moisture is fed into the feed port on the feeder 8. Then, the horizontal screw 91 in the horizontal feeder 9 conveys the material to the vertical feeder 10. Since the vertical screw 102 is perpendicular to the horizontal plane, the thrust of the vertical screw 102 is in the same direction as the gravity of the material due to gravity, which increases the downward movement of the material and facilitates feeding. At the same time, the horizontal motor 92 and the vertical motor 101 are variable frequency motors, which can adjust the feeding speed into the pressing chamber 6 to avoid blockage inside the pressing chamber 6.

[0035] The transmission components include a main motor 20 and a reducer 30. The main motor 20 is connected to the reducer 30, and the reducer 30 is rotatably connected to the first spiral screw 4 and the second spiral screw 5 via a torque distributor. Simultaneously, the main motor 20 reduces its speed and increases its torque through the reducer 30, ensuring that the first spiral screw 4 and the second spiral screw 5 are fully powered during rotation, resulting in better material pressing. The torque distributor flexibly adjusts the rotational torque of the first spiral screw 4 and the second spiral screw 5, reducing the probability of blockage inside the pressing chamber 6. The torque distributor is existing technology and will not be described in detail here.

[0036] Within the feeding section 1, the first spiral blade 41 and the second spiral blade 51 are staggered. This arrangement is called a forward conveying spiral with opposite meshing and single-sided gap. It has a high length-to-diameter ratio, which can improve the material conveying capacity of the first spiral screw 4 and the second spiral screw 5 and prevent the material from getting stuck or blocked inside.

[0037] The drainage component includes a drainage channel 50 and a drainage stud 40. The drainage stud 40 is installed inside the drainage channel 50, and a drainage motor drives the drainage stud 40 to rotate. The drainage channel 50 is positioned below the pressing chamber 6. In the compression component of this invention, the first spiral screw 4 and the second spiral screw 5 are arranged vertically in sequence, so that the squeezed water falls directly into the drainage channel 50 below. The power source used by the drainage stud 40 is a main motor 20, which enables the main motor 20 to drive the drainage stud 40 to send the residue and water in the drainage channel 50 outward.

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A double-helix dehydration device, characterized in that, It includes a transmission component, a compression component, a drainage component, and a feeding component. The feeding component conveys material into the compression component, and the drainage component is installed on the lower side of the compression component to discharge the water squeezed out by the compression component. The compression component includes a first spiral screw (4), a second spiral screw (5), and a pressing chamber (6). The first spiral screw (4) and the second spiral screw (5) are installed in the pressing chamber (6), which is divided into a feeding section (1), a dehydration section (2), and a discharging section (3) in sequence. The first spiral screw (4) includes a first column (42) with a first spiral blade (41) wound around its outer side. The second spiral screw (5) includes a second column (52) with a second spiral blade (51) wound around its outer side. Along the direction from the feeding section (1) to the discharging section (3), the diameters of the first column (42) and the second column (52) gradually increase. As the number of screws increases, in the dehydration section (2), both the first column (42) and the second column (52) are fitted with protrusions (7). The protrusions (7) are conical. The diameter of the protrusions (7) on the side closer to the discharge section (3) is larger than the diameter of the side away from the discharge section (3). In the dehydration section (2) and the discharge section (3), the first spiral blades (41) and the second spiral blades (51) are symmetrically placed along the length of the pressing chamber (6). Along the direction from the feeding section (1) to the discharge section (3), the pitch between the spiral blades gradually shortens. The transmission component drives the first spiral screw (4) and the second spiral screw (5) to rotate in opposite directions.

2. The double-helix dehydration device according to claim 1, characterized in that, The pressing chamber (6) is in contact with the first spiral blade (41) and the second spiral blade (51), and the pressing chamber (6) is a wire gap filter.

3. The double-helix dehydration device according to claim 1, characterized in that, The feeding components include a feeder (8), a horizontal feeder (9), and a vertical feeder (10). The feeder (8) is connected to the horizontal feeder (9). The end of the horizontal feeder (9) is connected to the vertical feeder (10). The lower end of the vertical feeder (10) is connected to the pressing chamber (6). A horizontal stud (91) is installed inside the horizontal feeder (9). A horizontal motor (92) drives the horizontal stud (91) to rotate. A vertical stud (102) is installed inside the vertical feeder (10). A vertical motor (101) drives the vertical stud (102) to rotate. The vertical stud (102) is perpendicular to the horizontal plane.

4. The double-helix dehydration device according to claim 1, characterized in that, The transmission component includes a main motor (20) and a reducer (30). The main motor (20) is connected to the reducer (30) in a transmission connection. The reducer (30) is rotatably connected to the first spiral screw (4) and the second spiral screw (5) respectively.

5. The double-helix dehydration device according to claim 1, characterized in that, Within the feeding section (1), the first helical blade (41) and the second helical blade (51) are interleaved.

6. The double-helix dehydration device according to claim 4, characterized in that, The drainage component includes a drainage groove (50) and a drainage stud (40). The drainage stud (40) is installed in the drainage groove (50). The main motor (20) drives the drainage stud (40) to rotate. The drainage groove (50) is installed on the lower side of the pressing chamber (6).

Images