A distributor for enhancing axial airflow transport

Abstract

The application belongs to the field of thin film evaporator, and relates to a distributor for strengthening axial airflow transportation, which comprises a cylindrical rotor and multiple rows of scrapers arranged on the outer periphery of the rotor, all the scrapers are uniformly distributed around the central axis of the rotor, and each of the scrapers is connected with the outer periphery of the rotor through a support plate; the contact area between each support plate and the outer periphery of the rotor is a spiral line, each support plate is composed of multiple rectangular areas arranged along the spiral line in sequence, the long side of each rectangular area is perpendicular to the outer periphery of the rotor, the short side of each rectangular area coincides with the spiral line, and all the support plates are uniformly distributed around the central axis of the rotor. The distributor provided by the application is inclinedly arranged with the support plates, which can not only improve the axial airflow transportation capacity in the distributor, reduce the accumulation of wet steam, but also will not have a negative impact on the uniformity of the distribution of the material liquid, is beneficial to improving the production efficiency, can also reduce the energy consumption, and has important application prospect.

Description

Technical Field

[0001] This invention belongs to the field of thin-film evaporators and relates to a fabric feeder that enhances axial airflow transport. Background Technology

[0002] The feeder is the first working area in the entire thin-film evaporator system, mainly composed of support plates, scrapers, and other components. Through the precise design and operation of the feeder, the liquid can be evenly distributed, and through the circumferential movement of the scraper and the gravity of the liquid, the liquid spreads evenly to form a liquid film, thereby ensuring stable and rapid evaporation of the liquid as it enters the evaporation zone, ensuring improved production efficiency and product quality.

[0003] Currently, the design of fabric feeders places greater emphasis on the development and optimization of multi-functionality to meet the requirements of different production environments and operating conditions. For example, invention patent application CN117858745A discloses a high-capacity thin-film evaporator for cellulose dissolution, such as... Figure 1 and Figure 2 As shown, each fabric spreading area scraper consists of a vertical plate 15 and multiple inclined plates 3 arranged at intervals from top to bottom. The vertical plate 15 is vertically set, with its inner surface facing the rotor 2 and its outer surface facing away from the rotor 2. The inclined plates 3 are fixed to the outer surface of the vertical plate. The inner surface of the vertical plate 15 is connected to the outer periphery of the rotor 2 through a vertically set lower support steel plate 16 and a vertically set upper support steel plate 4. The lower support steel plate 16 and the upper support steel plate 4 are provided with connecting grooves 14.

[0004] However, in the above-mentioned technical solution CN117858745A, the airflow is mainly discharged in a spiral manner on the outer surface of the vertical plate. The axial airflow speed and axial transport capacity are relatively weak. A large amount of water vapor still accumulates in the material distribution area, which has an adverse effect on the uniformity of material distribution and the subsequent evaporation work.

[0005] Therefore, it is necessary to develop a material distributor that enhances axial airflow transport, so as to improve the axial airflow transport capacity inside the material distributor without negatively affecting the uniformity of material distribution. Summary of the Invention

[0006] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide a fabric feeder that enhances axial airflow transport.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A fabric distributor for enhancing axial airflow transport includes a cylindrical rotor and multiple rows of scrapers disposed around the outer periphery of the rotor. All scrapers are evenly distributed around the central axis of the rotor, and each scraper is connected to the outer periphery of the rotor via a support plate. The contact area between each support plate and the outer periphery of the rotor is a spiral. Each support plate is composed of multiple rectangular areas arranged sequentially along the spiral. The long side of each rectangular area is perpendicular to the outer periphery of the rotor, and the short side of each rectangular area coincides with the spiral. All support plates are evenly distributed around the central axis of the rotor.

[0009] The principle of this invention is as follows:

[0010] This invention improves the airflow channel of the distributor, making the contact area between the support plate and the outer periphery of the rotor a spiral. At this time, the spiral is at a positive angle β with the rotor axis, which causes the support plate to tilt. This changes the flow path and velocity distribution of the airflow inside the distributor, increases the axial airflow velocity inside the distributor, and can more effectively guide the airflow inside the distributor from the bottom to the steam outlet. Especially when β is 35°-45°, it can take into account the axial airflow velocity and control the film laying and overflow ratio of the distributor within an appropriate range.

[0011] As a preferred technical solution:

[0012] As described above, a material distributor for enhancing axial airflow transport comprises a scraper consisting of a vertical plate and multiple inclined plates arranged at intervals from top to bottom. The vertical plate is vertically positioned with a V-shaped cross-section. The inner surface of the vertical plate faces the rotor, while the outer surface faces away from the rotor. In the prior art, the cross-section of the vertical plate is straight, typically pushing the liquid in a single direction, which can easily lead to linear accumulation of the liquid on the heating surface. Especially during high-speed rotation, the central area may form an excessively thick film layer due to centrifugal force, while the edge area may not have sufficient distribution. Therefore, this invention designs the cross-section of the vertical plate to be V-shaped, which can guide the liquid to diffuse to both sides of the heating surface, expand the coverage area, reduce local accumulation, and prevent the liquid from stagnating in the gaps or corners of the scrapers during rotation, thus improving the overall uniformity of film formation. The inner surface of the vertical plate is connected to the outer periphery of the rotor through a support plate, and the inclined plates are fixed to the outer surface of the vertical plate.

[0013] The above-mentioned material distributor for enhancing axial airflow conveying has a ratio of 2-5 inclined plates to 540mm in length of vertical plate. The inclined plates are set at an angle and form a negative angle with the rotor axis. , The angle is 10°-70°. The negative angle is formed from the rotor axis in a counterclockwise direction.

[0014] As described above, in a fabric distributor that enhances axial airflow transport, all the inclined plates have the same angle with the rotor axis.

[0015] As described above, a material distributor that enhances axial airflow transport has 20 rows of scrapers, with one scraper in each row.

[0016] As described above, the distance between the scraper and the upper end of the rotor is 150.5 mm, and the distance between the scraper and the lower end of the rotor is 344.5 mm.

[0017] The material distributor for enhancing axial airflow transport, as described above, has a rotor length of 1.7m and a circumference of 3801mm.

[0018] As described above, the fabric distributor for enhancing axial airflow has a rectangular area with a length of 135 mm and a support plate with a thickness of 18 mm.

[0019] As described above, the distance between the helix and the upper end of the rotor in a fabric distributor that enhances axial airflow transport is 1306 mm.

[0020] As described above, in a fabric feeder that enhances axial airflow transport, the spiral line forms a positive angle β with the rotor axis, where β is 45°. The positive angle is formed from the rotor axis in a clockwise direction, and the length of the spiral line is 1824 mm. At this point, the airflow transport capacity is at its strongest.

[0021] Beneficial effects:

[0022] (1) In the fabricator provided by the present invention, the contact area between the support plate and the outer periphery of the rotor is a spiral, which makes the support plate of the airflow channel tilted. This not only improves the axial airflow transport capacity inside the fabricator and reduces the accumulation of wet steam, but also does not affect the uniformity of the material distribution, which is conducive to the uniform film laying of the fabricator.

[0023] (2) The fabric feeder provided by the present invention not only improves the stability and production efficiency of the entire thin film evaporation process, but also helps to reduce energy consumption, and has important economic value and application prospects. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of a high-capacity thin-film evaporator for cellulose dissolution disclosed in existing technology CN117858745A;

[0025] Figure 2 This is a schematic diagram of the fabric area of ​​a high-capacity thin-film evaporator for cellulose dissolution, as disclosed in existing technology CN117858745A.

[0026] Figure 3 This is a top view of the fabric distributor with enhanced axial airflow transport provided by the present invention;

[0027] Figure 4 yes Figure 3The diagram shows the connection structure between the rotor and the support plate in the fabric feeder.

[0028] Figure 5 yes Figure 3 A schematic diagram of the scraper structure of the fabric feeder shown;

[0029] Figure 6 yes Figure 3 A schematic diagram of the support plate of the fabric feeder shown;

[0030] Figure 7 yes Figure 3 The diagram shows a fabric feeder whose helix forms a positive angle β with the rotor axis.

[0031] Figure 8 This is a schematic diagram of the connection structure between the rotor and the support plate in the feeder provided in the example.

[0032] Figure 9 It is a graph showing how the lift coefficient changes with the angle of attack α;

[0033] Figure 10 This is a cloud map of the material distribution on the outer ring of the distributor (the area inside the scraper in the distributor is the inner ring, and the area outside the scraper is the outer ring; red represents the area covered by material, and the redder the color, the higher the proportion of material; blue represents the area without material).

[0034] Figure 11 This is a graph showing the effect of β on the velocity distribution;

[0035] Figure 12 The graph shows the effect of β on the axial airflow velocity of the fabric distributor cross section.

[0036] Figure 13 It is a contour plot of the radial airflow velocity across the cross-section of the fabric distributor (β is 45°).

[0037] Figure 14 It is a cloud map showing the proportion of slurry overflowing from the feeder;

[0038] Figure 15 This is a graph showing the relationship between the height of the distributor and the average volume fraction of the liquid.

[0039] Figure 16 This is a graph showing the effect of β on the spillover ratio;

[0040] Figure 17 This is a graph showing the effect of β on the proportion of liquid held in the outer ring and the total liquid held (total liquid held refers to the total liquid held in the outer and inner rings of the distributor).

[0041] Figure 18 This is a graph showing the effect of β on the effective fabric ratio and the rate of liquid descent.

[0042] In the diagram, 1 is the support plate, 2 is the rotor, 3 is the inclined plate, 4 is the upper support steel plate, 5 is the rectangular area, 14 is the connecting groove, 15 is the vertical plate, and 16 is the lower support steel plate. Detailed Implementation

[0043] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0044] Examples 1-12

[0045] like Figures 3-6 The fabric distributor shown includes a chamber and a cylindrical rotor 2 located in the chamber, as well as multiple rows of scrapers disposed on the outer periphery of the rotor 2.

[0046] All scrapers are evenly distributed around the central axis of rotor 2. Each scraper is connected to the outer periphery of rotor 2 through a support plate 1. The contact area between each support plate 1 and the outer periphery of rotor 2 is a spiral. Each support plate 1 is composed of multiple rectangular areas 5 arranged sequentially along the spiral. The long side of each rectangular area 5 is perpendicular to the outer periphery of rotor 2, and the short side of each rectangular area 5 coincides with the spiral. All support plates 1 are evenly distributed around the central axis of rotor 2.

[0047] like Figure 5 Each scraper shown consists of a vertical plate 15 and multiple inclined plates 3 arranged at intervals from top to bottom; the vertical plate 15 is vertically arranged and has a V-shaped cross-section, the inner surface of the vertical plate 15 faces the rotor 2, and the outer surface of the vertical plate 15 faces away from the rotor 2; the inner surface of the vertical plate 15 is connected to the outer periphery of the rotor 2 through the support plate 1, and the inclined plates 3 are fixed on the outer surface of the vertical plate 15.

[0048] The ratio of the number of inclined plates 3 to the length of the vertical plate 15 is 4 plates: 540mm. The inclined plates 3 are set at an angle and form a negative angle with the rotor axis. , The angle is 40°; all the inclined plates 3 have the same angle with the rotor axis;

[0049] There are 20 rows of scrapers, with 1 scraper in each row; the distance between the scraper and the upper end of rotor 2 is 150.5 mm, and the distance between the scraper and the lower end of rotor 2 is 344.5 mm.

[0050] The rotor 2 is 1.7m long and 3801mm in circumference; the rectangular area 5 is 135mm long and the support plate 1 is 18mm thick; the distance between the helix and the upper end of the rotor 2 is 1306mm.

[0051] like Figure 7 As shown, the helix forms a positive angle β with the rotor axis. The values ​​of β are 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, and 60°. Each value of β corresponds to a length of the helix. When β is 45°, the length of the helix is ​​1824 mm.

[0052] Comparative Example 1

[0053] like Figure 8 The fabric feeder shown is basically the same as the embodiment, except that β is 0°, that is, the support plate 1 remains vertical.

[0054] Simulation experiments will be conducted on the fabric feeder of the comparative and embodiment examples.

[0055] The specific steps of the simulation experiment are as follows:

[0056] (1) The material feeder is divided into a material feeding area and an airflow channel area, which are defined as the outer ring and the inner ring respectively according to their positions; in the material feeder, the area inside the scraper is the inner ring, and the area outside the scraper is the outer ring;

[0057] (2) Set the β value and build the fluid domain by modeling, and then perform mesh independence verification (mesh independence verification is used to show the correctness of the simulation results, representing that the simulation results are independent of the number of meshes); the feed rate of the liquid is 194 grams per second, and the rotor speed is 90 revolutions per minute;

[0058] (3) Simulation calculations were performed using the VOF model and the MRF (multiple reference frames) model. The VOF model reasonably represents the water vapor phase and the liquid phase in the feeder, while the MRF model simulates the rotational scraping of the feeder. The governing equations (continuity and momentum equations) in the rotating reference frame are as follows:

[0059]

[0060]

[0061]

[0062] In the formula It is static pressure. and For gravity and external forces, For stress tensor, For fluid velocity vector, , It is the angular velocity vector. The position vector in the rotating coordinate system;

[0063] (4) The liquid film of the feed solution is set. First, the liquid film thickness is defined. Data is extracted from the three-dimensional model, and the average value of the uneven liquid film thickness is calculated. Then, the viscosity of the liquid film is set. If the feed solution is a non-Newtonian fluid, its average viscosity is calculated. Finally, the heating temperature at the wall is defined. If the wall heating temperature changes, its average value is also taken, and the relative humidity is set above the liquid film. When performing gas-liquid two-phase analysis, the solute of the feed solution is cellulose, and the content of NMMO in the feed solution is 70wt%. NMMO is used to replace the feed solution as the main phase of the simulation medium, and air is used as the secondary phase of the simulation medium. The Carreau Model in the CFD software is used to simulate the viscosity of the feed solution (NMMO cellulose water feed solution). The viscosity calculation formula is as follows:

[0064]

[0065] In the formula, This represents apparent viscosity, measured in Pa·s. This represents zero-shear viscosity, measured in Pa·s. Represents relaxation time, in units of ; Represents shear rate, in units of ; Represents the power-law exponent, with no unit;

[0066] (5) Import the airflow velocity data and feed liquid data obtained from the simulation into the CFDPOST software for processing to obtain... Figure 10 , Figure 13 and Figure 14 The airflow velocity and feed liquid data at different β values ​​were extracted using the CFDPOST software and then processed using the ORIGIN software to obtain the final product. Figure 11 , Figure 12 , Figure 15 , Figure 16 , Figure 17 and Figure 18 .

[0067] like Figure 9 The curve shown is the lift coefficient versus angle of attack curve recorded in the literature (Wu Bingli, Gao Yanfu. Air-cooled Axial Flow Fan [M]. Harbin: Harbin Institute of Technology Press, 2007: 34). The vertical axis C in the figure is... L The horizontal axis represents the lift coefficient, the horizontal axis α represents the angle of attack, and the circular curve indicated by the arrow represents the airflow transport performance; there is a maximum lift coefficient on the lift curve. ,and The corresponding angle of attack is called the critical angle of attack. Zero lift coefficient ( The angle of attack corresponding to (=0) is called the zero-lift angle of attack. When the lift coefficient reaches its maximum value It has the strongest lift and air transport capacity; when the angle of attack exceeds the critical angle of attack... Subsequently, the lift coefficient drops sharply due to airflow deceleration and boundary layer separation, forming a flow separation point; however, Figure 9 This only shows that the angle of attack affects lift. The angle of attack corresponding to the maximum lift and air transport capacity is not necessarily the β value corresponding to the maximum axial airflow velocity of the distributor. This is because the β value corresponding to the maximum axial airflow velocity should also take into account the distance between the distributor cross-section and the rotor wall. Therefore, it is necessary to select the β value that is closest to the rotor wall with the maximum axial airflow velocity and furthest from the rotor wall with the minimum axial airflow velocity.

[0068] The feed distributor needs to ensure uniform distribution of the liquid feed to provide initial conditions for subsequent evaporation. The uniformity of the feed distribution mainly refers to the uniformity of the liquid distribution around the outer ring of the feed distributor. Within a certain range, the higher the uniformity of the liquid distribution, the better the feed distribution performance, and the better it can increase the airflow rate during the evaporation stage, effectively improving evaporation efficiency. Figure 10 As shown, when the β of the feeder is 0° or the inclination angle of the support plate is 0°, the material distribution on the outer ring of the feeder is uneven.

[0069] like Figure 11 As shown, as β gradually increases, the axial airflow velocity inside the distributor also gradually increases. However, if β exceeds a certain range, the axial airflow velocity will gradually decrease. Therefore, the β of the support plate should be reasonably selected. If β is too small, the effect of increasing the axial airflow velocity will not be particularly significant; conversely, if β is too large, the axial airflow velocity will decrease. Radial and tangential airflow velocities affect the fluid handling capacity of the distributor. For example, the tangential airflow velocity affects the residence time of the liquid and the thickness and uniformity of the liquid film in the distributor. Changes in β also cause slight fluctuations in radial and tangential airflow velocities. These slight fluctuations indicate that changes in the β of the support plate have little impact on the overall distribution of the liquid. In addition, in Figure 11 In the diagram, the axial airflow velocity reaches its maximum value when β is 35°. However, this does not necessarily mean that the axial airflow velocity is the optimal one. This is because the optimal axial airflow velocity for the feeder should also consider the film formation of the feed liquid and the axial airflow velocity distribution across the feeder's cross-section. Excessive axial airflow velocity can negatively impact the film formation process. Figure 11 The axial airflow velocity did not take into account the factor of proximity to the rotor wall; it only considered the axial airflow velocity at the center of the distributor.

[0070] like Figure 12As shown, the distribution of axial airflow velocity across the distributor cross-section tends to change regularly with the variation of β. The cross-section near the rotor wall exhibits a larger axial airflow velocity, indicating that the airflow conveying capacity of the inner ring of the distributor is strong, and wet steam can be discharged from the inner ring. When the support plate is tilted to nearly 45°, the axial airflow velocity shows a decreasing trend. This decreasing trend means that excessive variation of β will limit further increase in axial airflow velocity. The reason for limiting the increase in axial airflow velocity is that when β is too large, the airflow inside the distributor is suppressed, resulting in velocity separation. This velocity separation weakens the airflow guiding effect.

[0071] like Figure 13 As shown, there is a large radial airflow velocity in the cross section near the rotor wall, which means that the airflow conveying capacity of the inner ring of the distributor is strong, and wet steam can be discharged from the inner ring of the distributor.

[0072] like Figure 14 As shown, the area above the feed inlet of the distributor is called the overflow area. In industrial production, when a large amount of liquid material is distributed in the area above the feed inlet, it is easily sucked out by the negative pressure generated by the vacuum pump at the outlet. Therefore, the area occupied by the liquid material in the overflow area is defined as the liquid material occupation area, and the ratio of the liquid material occupation area to the total overflow area is defined as the overflow ratio. When the distributor is working, the liquid material distribution on the outer ring of the distributor is uneven. There are two main reasons for this: First, the viscosity of the liquid material is high. When the inclined plate disperses the liquid material to the outer ring of the distributor, the inherent viscosity characteristics of the liquid material make it difficult to spread. Second, because there are gaps between the inclined plates, the liquid material will accumulate at the front end of the inclined plate when the inclined plate moves circumferentially.

[0073] like Figure 15 As shown, to more intuitively understand the liquid distribution in the outer ring of the distributor, the liquid volume fraction in the outer ring of the distributor was statistically analyzed. The average volume fraction of the liquid in the same height area was taken to obtain the average volume fraction of the liquid. The average volume fraction of the liquid in the outer ring of the distributor corresponding to different distributor heights was analyzed. It was observed that the average volume fraction of the liquid in the outer ring of the distributor gradually increases from top to bottom. This distribution pattern is consistent with the liquid distribution pattern of the evaporation system. Since the liquid distribution in the distributor is mainly affected by the circumferential movement of the internal scraper and the weight of the liquid, the movement of the scraper plays a dominant role in the uniform distribution of the liquid.

[0074] like Figure 16As shown, there is a close correlation between the change in overflow ratio and the change in axial airflow velocity. The increase in axial airflow velocity will increase the upward movement speed of the liquid inside the distributor, thereby increasing the risk of liquid overflow to a certain extent. However, the relationship between overflow ratio and axial airflow velocity is not linear. In particular, the axial airflow velocity at β=45° is nearly 100% higher than that at β=0°, 5° or 10°, but the change in overflow ratio is relatively limited, increasing by only about 30%. This result indicates that inside the distributor, although the increase in axial airflow velocity does increase the upward movement of the liquid, this increase does not lead to a significant change in the liquid distribution in the outer ring of the distributor. In other words, increasing the axial airflow velocity inside the distributor will affect liquid overflow, but will not cause a significant change in the liquid distribution in the outer ring of the distributor. Therefore, in the distributor, the increase in axial airflow transport capacity has a low adverse effect on the liquid distribution performance of the distributor.

[0075] like Figure 17 As shown, as the β of the distributor increases, the proportion of liquid held in the outer ring decreases, but the total liquid held gradually increases with the increase of β. The increase in the total liquid held is because the increase in the axial airflow velocity of the distributor hinders the flow of liquid in the outer ring of the distributor.

[0076] like Figure 18 As shown, when β is small, the descent rate of the liquid material inside the distributor decreases as β increases. This is because after the axial airflow velocity inside the distributor increases, the influence of the axial airflow on the liquid material in the outer ring of the distributor is enhanced, thus slowing down the descent rate. When β increases to a certain value, the descent rate of the liquid material in the outer ring of the distributor actually increases. This is because the influence of the axial airflow on the liquid material in the outer ring of the distributor decreases, and the liquid material's descent rate increases under its own gravity. When β is small, the effective distribution ratio of the distributor increases as β increases. This indicates that when the β of the distributor is appropriate, it helps to improve the distribution state of the liquid material. This is because when the support plate is tilted at a certain angle, the radial pressure difference of the distributor causes some of the liquid material to flow from the outer ring to the inner ring, allowing more liquid material to remain in the inner ring. At the same time, the slowdown in the descent rate of the liquid material leads to an increase in the number of scraper movements per unit time on the liquid material in the outer ring of the distributor, resulting in a more uniform distribution of the liquid material and a reduced thickness of the liquid film formed by the liquid material.

[0077] In summary, the feeder of the present invention improves the axial transport capacity without affecting the film laying on the outer ring of the feeder. That is, it not only improves the axial airflow velocity of the inner ring of the feeder, but also does not affect the film laying of the liquid on the outer ring of the feeder.

Claims

1. A fabric distributor for enhancing axial airflow transport, comprising a cylindrical rotor (2) and multiple rows of scrapers disposed around the outer periphery of the rotor (2), all scrapers being evenly distributed around the central axis of the rotor (2), characterized in that, Each scraper is connected to the outer periphery of the rotor (2) through a support plate (1); the contact area between each support plate (1) and the outer periphery of the rotor (2) is a spiral line. Each support plate (1) is composed of multiple rectangular areas (5) arranged sequentially along the spiral line. The long side of each rectangular area (5) is perpendicular to the outer periphery of the rotor (2), and the short side of each rectangular area (5) coincides with the spiral line. All the support plates (1) are evenly distributed around the central axis of the rotor (2). The spiral line is at a positive angle β with the rotor axis, and β is 35°-45°.

2. A fabric distributor for enhancing axial airflow transport according to claim 1, characterized in that, Each scraper consists of a vertical plate (15) and multiple inclined plates (3) arranged at intervals from top to bottom; the vertical plate (15) is set vertically and has a V-shaped cross-section, with the inner surface of the vertical plate (15) facing the rotor (2) and the outer surface of the vertical plate (15) facing away from the rotor (2); the inner surface of the vertical plate (15) is connected to the outer periphery of the rotor (2) through a support plate (1), and the inclined plates (3) are fixed on the outer surface of the vertical plate (15).

3. A fabric distributor for enhancing axial airflow transport according to claim 2, characterized in that, The ratio of the number of inclined plates (3) to the length of the vertical plate (15) is 2-5 pieces: 540mm. The inclined plates (3) are set at an angle and form a negative angle with the rotor axis. , The range is 10°-70°.

4. A fabric distributor for enhancing axial airflow transport according to claim 3, characterized in that, All the inclined plates (3) have the same angle with the rotor axis.

5. A fabric distributor for enhancing axial airflow transport according to any one of claims 1-4, characterized in that, There are 20 rows of scrapers, with one scraper in each row.

6. A fabric distributor for enhancing axial airflow transport according to claim 5, characterized in that, The distance between the scraper and the upper end of the rotor (2) is 150.5 mm, and the distance between the scraper and the lower end of the rotor (2) is 344.5 mm.

7. A fabric distributor for enhancing axial airflow transport according to claim 6, characterized in that, The rotor (2) has a length of 1.7m and a circumference of 3801mm.

8. A fabric distributor for enhancing axial airflow transport according to claim 7, characterized in that, The length of the rectangular area (5) is 135mm, and the thickness of the support plate (1) is 18mm.

9. A fabric distributor for enhancing axial airflow transport according to claim 8, characterized in that, The distance between the helix and the upper end of the rotor (2) is 1306 mm.

10. A fabric distributor for enhancing axial airflow transport according to claim 9, characterized in that, β is 45°, and the length of the helix is ​​1824 mm.

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