Drying stirrer and chlorosilane slag slurry drying device

Abstract

The utility model discloses a drying stirrer and a chlorosilane slag slurry drying device, which can improve the stirring, scattering and propelling effects on materials and prevent the materials from being blocked in the drying stirrer. The drying stirrer comprises a heating cylinder (1) and a stirring shaft (2). The stirring shaft (2) is rotationally arranged on the axis of the heating cylinder (1), and a plurality of paddles (3) are arranged on the stirring shaft (2); the stirring shaft (2) is used for driving the paddles (3) to stir materials in the heating cylinder (1) during rotation. With the vertical symmetry axis of the heating cylinder (1) as the boundary, the inclination directions of the blades (3) on the two sides of the vertical symmetry axis are opposite, so that when the stirring shaft (2) rotates in the first direction, materials in the heating cylinder (1) move from the middle of the heating cylinder (1) to the two ends of the heating cylinder (1), and when the stirring shaft (2) rotates in the second direction, the materials in the heating cylinder (1) move from the two ends of the heating cylinder (1) to the middle of the heating cylinder (1).

Description

Technical Field

[0001] This utility model belongs to the field of polycrystalline silicon production technology, specifically relating to a drying agitator and a chlorosilane slurry drying device. Background Technology

[0002] Current polysilicon production processes generate solid slurries containing chlorosilanes and chlorides during production and purification. These solid slurries readily react with air and water to form flammable, explosive, and corrosive substances. If discharged arbitrarily without treatment, they will pollute the environment.

[0003] The most common method currently is to separate chlorosilanes from the solid slurry by heating and drying. The dried solid slurry is then sent to subsequent processes, thereby reducing the amount of subsequent hydrolysis treatment.

[0004] The existing dryer has 16 stirring blades and 14 heating blades. The heating blades do not have a stirring function. All the blades are in the same direction. When the motor is rotating forward, the material moves to the non-driving end. When the motor is rotating in reverse, the material moves to the driving end. The stirring and dispersing effect on the material is limited.

[0005] The existing dryer is designed to process chlorosilane solid slurry with a solid content of 1.5% to 6% (main volatile components: chlorosilane and silicon powder), and therefore has 14 sets of heating blades. However, the actual dryer to be processed is chlorosilane solid slurry with a solid content of 20% to 30% (main volatile components: chlorosilane and silicon powder) after static overflow concentration treatment. The dryer can meet the heating requirements through the shell jacket. This results in the dryer drying the solid slurry too quickly and solidifying it prematurely under the new operating conditions (chlorosilane solid slurry with a solid content of 20% to 30%), which hinders the movement of nearby solid slurry inside the shell. Furthermore, the heating blades cannot effectively lift and propel the solid slurry, thus frequently causing the dryer to become clogged. Utility Model Content

[0006] The technical problem to be solved by this utility model is to address the above-mentioned deficiencies in the existing technology by providing a drying mixer and a chlorosilane slurry drying device, which can improve the mixing, dispersing and propulsion effect of materials and avoid material blockage in the drying mixer.

[0007] In a first aspect, this utility model provides a drying agitator, which includes a heating cylinder and a stirring shaft. The heating cylinder is horizontally arranged and used to heat the material inside the heating cylinder. The stirring shaft is rotatably arranged on the axis of the heating cylinder, and multiple blades are arranged on the stirring shaft; the stirring shaft is used to drive the blades to stir the material inside the heating cylinder when rotating. Taking the vertical axis of symmetry of the heating cylinder as a boundary, the inclination directions of the blades on both sides of the vertical axis of symmetry are opposite, so that when the stirring shaft rotates in a first direction, the material inside the heating cylinder moves from the middle to both ends of the heating cylinder, and when the stirring shaft rotates in a second direction, the material inside the heating cylinder moves from both ends to the middle of the heating cylinder; wherein, the first direction and the second direction are two opposite directions of rotation.

[0008] In some embodiments, the angles between the tilting directions of the blades located on both sides of the vertical axis of symmetry of the heating cylinder and the axial direction of the stirring shaft are equal.

[0009] In some embodiments, the angle between the tilt direction of each blade and the axial direction of the stirring shaft is a tilt angle α, where 50°≤α≤60°.

[0010] In some embodiments, each blade is fixed to the stirring shaft by a blade shaft, and the extension direction of each blade shaft passes through the axis of the stirring shaft. Multiple blade shafts are arranged in multiple columns along the axis of the stirring shaft, with an angle between any two adjacent columns of blade shafts, and the angles between any two adjacent columns of blade shafts are equal.

[0011] In some embodiments, in each row of blade shafts, the horizontal distance between any two adjacent blade shafts is L, where 50cm≤L≤75cm.

[0012] In some embodiments, any two adjacent rows of blade shafts are staggered along the axial direction of the stirring shaft. In any two staggered rows of blade shafts along the axial direction of the stirring shaft, the horizontal distance between any two adjacent blade shafts is L / 2.

[0013] In some embodiments, the outer edge of the blade is arc-shaped, and the minimum distance between any position on the outer edge of each blade and the inner wall of the heating cylinder is M, where 5cm≤M≤10cm.

[0014] In some embodiments, the heating cylinder has end caps at both ends. Scrapers are provided on the two blade shafts closest to the end caps, each scraper located on the side of the blade shaft facing the corresponding end cap, for cleaning material on the corresponding end cap under the action of the stirring shaft.

[0015] In some embodiments, the plane of rotation formed by each scraper when it rotates is parallel to the corresponding end cap, and the minimum distance between each scraper and the corresponding end cap is N, where 3cm≤N≤8cm.

[0016] Therefore, the drying mixer provided in this embodiment of the present invention can heat the material inside the heating cylinder by setting a heating cylinder; by setting a stirring shaft on the axis of the heating cylinder and setting multiple blades on the stirring shaft, the stirring shaft can drive the blades to stir and disperse the material inside the heating cylinder when rotating; by making the inclination directions of the blades on both sides of the vertical axis of symmetry of the heating cylinder opposite, when the stirring shaft rotates in the first direction, the material inside the heating cylinder moves from the middle to both ends of the heating cylinder, and when the stirring shaft rotates in the second direction, the material inside the heating cylinder moves from both ends to the middle of the heating cylinder. Therefore, when the stirring shaft rotates alternately in the first and second directions, it can drive the blades to fully disperse the material, improve the stirring, dispersing and propulsion effect of the material, make the material fully heated in the heating cylinder, accelerate the drying speed and movement speed of the material, improve the working efficiency of the dryer, and avoid the material stagnating in the heating cylinder and causing blockage. Furthermore, compared to existing technologies, the drying mixer in this embodiment of the invention does not have heating blades. Each blade can stir, disperse, and propel the material. Therefore, it can prevent the material near the heating blades from drying too quickly and solidifying prematurely, and it can also prevent the material from becoming blocked in the heating cylinder because the heating blades cannot propel the material forward. Thus, the drying mixer can be suitable for drying materials with high solid content.

[0017] Secondly, this utility model embodiment also provides a chlorosilane slurry drying device, which includes the drying agitator and driving component described in the first aspect. The heating cylinder of the drying agitator is provided with an inlet and an outlet; the cylinder wall has a first jacket, within which a heating medium flows for heating the chlorosilane slurry inside the heating cylinder, thereby achieving the drying of the chlorosilane slurry. The driving component is drively connected to the stirring shaft of the drying agitator, for driving the stirring shaft to rotate.

[0018] The chlorosilane slurry drying device provided in this embodiment of the invention has the same beneficial effects as the drying agitator described above, and will not be repeated here. Attached Figure Description

[0019] Figure 1 : A schematic diagram of a drying stirrer provided in an embodiment of this utility model. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Example 1:

[0022] like Figure 1 As shown in the figure, this utility model embodiment provides a drying agitator, which can be applied to the drying process of slurry materials.

[0023] like Figure 1 As shown, the drying agitator includes a heating cylinder 1 and a stirring shaft 2. The heating cylinder 1 is horizontally positioned for heating the material inside. The stirring shaft 2 is rotatably mounted on the axis of the heating cylinder 1 and has multiple blades 3. The stirring shaft 2 drives the blades 3 to stir the material inside the heating cylinder 1 when it rotates. With the vertical axis of symmetry of the heating cylinder 1 as the boundary, the blades 3 on both sides of the vertical axis of symmetry have opposite inclination directions. This is such that when the stirring shaft 2 rotates in the first direction, the material inside the heating cylinder 1 moves from the middle to both ends of the heating cylinder 1, and when the stirring shaft 2 rotates in the second direction, the material inside the heating cylinder 1 moves from both ends to the middle of the heating cylinder 1. The first direction and the second direction are two opposite directions of rotation.

[0024] For example, the material inside the heating cylinder 1 is the material to be dried, such as chlorosilane slurry.

[0025] The horizontally positioned heating cylinder 1 allows for a uniform distribution of materials inside.

[0026] For example, the heating cylinder 1 may be provided with an electric heating element or a heat exchange element on its cylinder wall to heat the material inside the heating cylinder 1.

[0027] For example, the stirring shaft 2 is connected to an external drive unit to drive multiple blades 3 to rotate under the drive of the drive unit. The blades 3 stir and disperse the material in the heating cylinder 1. During the stirring and dispersing process, the material is heated and dried and solidified at the cylinder wall of the heating cylinder 1.

[0028] For example, such as Figure 1 As shown, Figure 1 The blades 3 on the left side of the vertical axis of symmetry of the intermediate heating cylinder 1 are all tilted to the right. Figure 1 The blades 3 on the right side of the vertical axis of symmetry of the heating cylinder 1 are all tilted to the left, so the blades 3 will have different propulsive effects on the material during rotation.

[0029] For example, if the first direction is clockwise, then the second direction is counterclockwise; or, if the first direction is counterclockwise, then the second direction is clockwise.

[0030] When the stirring shaft 2 rotates along the first or second direction, under the stirring and pushing action of the blades 3, the materials on both sides of the vertical axis of symmetry of the heating cylinder 1 move in opposite directions. The materials can gather from both ends to the center or disperse from the middle to both ends in the heating cylinder 1. By making the stirring shaft 2 rotate alternately along the first and second directions, the blades 3 can fully disperse the materials, improve the stirring, dispersing and pushing effect of the materials, and make the materials fully heated in the heating cylinder 1, accelerate the drying speed and movement speed of the materials, improve the working efficiency of the drying mixer, and avoid the materials from stagnating in the heating cylinder 1 and causing blockage, thereby improving the safety of the drying mixer.

[0031] Furthermore, compared to the prior art, the drying mixer in this embodiment of the invention does not have heating blades. Each blade 3 can stir, disperse, and propel the material. Therefore, it can avoid the material near the heating blades from drying too quickly and solidifying prematurely, and avoid the material from becoming blocked in the heating cylinder 1 because the heating blades cannot propel the material forward. Thus, the drying mixer can be suitable for drying materials with high solid content (e.g., solid content of 20% to 30%).

[0032] Therefore, the drying mixer provided in this embodiment of the present invention can heat the material inside the heating cylinder 1 by setting a heating cylinder 1; by setting a stirring shaft 2 on the axis of the heating cylinder 1 and setting multiple blades 3 on the stirring shaft 2, the stirring shaft 2 can drive the blades 3 to stir and disperse the material inside the heating cylinder 1 when rotating; by making the inclination directions of the blades 3 on both sides of the vertical axis of symmetry of the heating cylinder 1 opposite, the material inside the heating cylinder 1 can move from the middle to both ends when the stirring shaft 2 rotates in the first direction, and the material inside the heating cylinder 1 can move from both ends to the middle when the stirring shaft 2 rotates in the second direction. Therefore, when the stirring shaft 2 rotates alternately in the first and second directions, it can drive the blades 3 to fully disperse the material, improve the stirring, dispersing and propulsion effect of the material, make the material fully heated in the heating cylinder 1, accelerate the drying speed and movement speed of the material, improve the working efficiency of the dryer, and avoid the material stagnating in the heating cylinder 1 and causing blockage. Furthermore, compared to the prior art, the drying mixer in this embodiment of the invention does not have heating blades. Each blade 3 can stir, disperse, and propel the material. Therefore, it can avoid the material near the heating blades from drying too quickly and solidifying prematurely, and avoid the material from becoming blocked in the heating cylinder 1 because the heating blades cannot propel the material forward. Thus, the drying mixer can be suitable for drying materials with high solid content (e.g., solid content of 20% to 30%).

[0033] In some embodiments, such as Figure 1 As shown, the angles between the tilting directions of the blades 3 located on both sides of the vertical axis of symmetry of the heating cylinder 1 and the axial direction of the stirring shaft 2 are all equal.

[0034] The above settings simplify the design and installation of the blades, ensuring that each blade 3 has the same stirring and propulsive effect on the material, allowing the material to be heated and moved forward evenly within the heating cylinder 1.

[0035] In some embodiments, such as Figure 1 As shown, the angle between the tilt direction of each blade 3 and the axial direction of the stirring shaft 2 is an tilt angle α, where 50°≤α≤60°.

[0036] For example, the tilt angle α can be 50°, 55° or 60°, etc.

[0037] The aforementioned tilt angle α can enable each blade 3 to have a better stirring and propulsion effect on the material, and avoid excessive resistance when each blade 3 rotates, which would affect the rotation speed of the stirring shaft 2.

[0038] In some embodiments, such as Figure 1 As shown, each blade 3 is fixed to the stirring shaft 2 by a blade shaft 4, and the extension direction of each blade shaft 4 passes through the axis of the stirring shaft 2. Multiple blade shafts 4 are arranged in multiple rows along the axis of the stirring shaft 2, and any two adjacent rows of blade shafts 4 form an angle, and the angle between any two adjacent rows of blade shafts is equal.

[0039] For example, each impeller shaft 4 is detachably mounted on the stirring shaft 2, or each impeller shaft 4 is welded to the stirring shaft 2. The impeller 3 can also be detachably mounted on the impeller shaft 4, or welded to the impeller shaft 4.

[0040] The number of multiple impeller shafts 4 arranged in a row along the axis of the stirring shaft 2 can be set according to the actual situation.

[0041] For example, such as Figure 1 As shown, multiple impeller shafts 4 are arranged in four rows along the axis of the stirring shaft 2. The included angle between any two adjacent rows of impeller shafts 4 is 90°. The first row of impeller shafts 4 and the third row of impeller shafts 4 (i.e., the two rows of impeller shafts 4 located in the direction perpendicular to the paper plane, where one row of impeller shafts 4 is in the direction perpendicular to the paper plane) Figure 1 The blades are arranged in opposite directions (the middle is blocked), with 8 pairs of blades facing each other. The second row of blade shafts 4 and the fourth row of blade shafts 4 (i.e., the two rows of blade shafts 4 in the vertical direction) are arranged in opposite directions with 7 pairs of blades.

[0042] Alternatively, multiple blade shafts 4 can be arranged in three rows along the axis of the stirring shaft 2, with the included angle between any two adjacent rows of blade shafts 4 being 120°.

[0043] With the above settings, the blades 3 can be evenly distributed in the rotation plane of the stirring shaft 2, so that the material generates a more uniform flow field in the heating cylinder 1, improving the stirring effect of the material, and making the stirring shaft 2 uniformly stressed in the rotation plane.

[0044] In some embodiments, such as Figure 1 As shown, in each row of blade shafts 4, the horizontal distance between any two adjacent blade shafts 4 is L, where 50cm≤L≤75cm.

[0045] For example, in each row of blade shafts 4, the horizontal distance L between any two adjacent blade shafts 4 can be 50cm, 65cm or 75cm, etc.

[0046] For example, the length of the outer edge of the blade 3 can be 65cm, 70cm or 75cm, which can avoid interference between two adjacent blades 3 and avoid the gap between two adjacent blades 3 being too large, thus affecting the mixing and propulsion effect of the material.

[0047] The above configuration facilitates the installation of the stirring shaft 2 and the impeller shaft 4. It also ensures that the impeller shaft 4 and the impeller blades 3 are evenly distributed on the stirring shaft 2, allowing the stirring shaft 2 to uniformly stir the material inside the heating cylinder 1 when it rotates.

[0048] In some embodiments, such as Figure 1 As shown, in the axial direction of the stirring shaft 2, any two adjacent rows of blade shafts 4 are staggered; in the axial direction of the stirring shaft 2, the horizontal distance between any two adjacent blade shafts 4 in any two staggered rows of blade shafts 4 is L / 2.

[0049] In the axial direction of the stirring shaft 2, any two adjacent rows of blade shafts 4 are staggered, meaning that no two blade shafts 4 in any two adjacent rows of blade shafts 4 overlap in the vertical direction.

[0050] For example, such as Figure 1 As shown, the blade shafts 4 in the second and fourth rows of blade shafts 4 (i.e., the two rows of blade shafts 4 located in the vertical direction) are all relative to the first and third rows of blade shafts 4 (i.e., the two rows of blade shafts 4 located in the direction perpendicular to the paper surface, where one row of blade shafts 4 is in the vertical direction). Figure 1 The blade shaft 4 in the (obscured) is misaligned in the axial direction of the stirring shaft 2.

[0051] For example, when L is 65cm, the horizontal distance between any two adjacent blade shafts 4 in the vertical direction is 32.5cm.

[0052] With the above settings, the distance between any two adjacent blade shafts 4 can be made equal in the axial direction of the heating cylinder 1, so that when the stirring shaft 2 rotates, multiple blades 3 can uniformly and fully stir the material in the heating cylinder 1, improve the stirring effect of the material, and make the stirring shaft 2 uniformly stressed in its axial direction.

[0053] In some examples, such as Figure 1 As shown, in the second row of blade shafts 4 and the fourth row of blade shafts 4 (two vertical rows of blade shafts 4), there are two blade shafts 4 that are exactly located on the vertical axis of symmetry of the heating cylinder 1. Therefore, the tilting directions of the two blades 3 corresponding to these two blade shafts 4 can be set to opposite directions.

[0054] For example, Figure 1 In the middle, the blade 3 located on the upper side of the vertical axis of symmetry of the heating cylinder 1 is tilted to the right, and the blade 3 located on the lower side is tilted to the left.

[0055] In some embodiments, the outer edge of the blade 3 is arc-shaped, and the minimum distance between any position on the outer edge of each blade 3 and the inner wall of the heating cylinder 1 is M, where 5cm≤M≤10cm.

[0056] For example, the value of M can be 5cm, 8cm, or 10cm, etc.

[0057] With the above settings, the distance between each position on the outer edge of the blade 3 and the inner wall of the heating cylinder 1 can be equal, avoiding collision and interference between the blade 3 and the inner wall of the heating cylinder 1, and preventing the distance between the blade 3 and the inner wall of the heating cylinder 1 from being too large, which would affect the stirring effect of the blade 3.

[0058] In some embodiments, such as Figure 1 As shown, the heating cylinder 1 has end caps 5 at both ends. Scrapers 6 are provided on the two blade shafts 4 closest to the end caps 5. Each scraper 6 is located on the side of the blade shaft 4 facing the corresponding end cap 5, and is used to clean the material on the corresponding end cap 5 under the drive of the stirring shaft 2.

[0059] For example, the stirring shaft 2 is rotatably mounted on two end caps 5.

[0060] For example, each scraper 6 is welded to the corresponding blade 3 and rotates with the blade 3.

[0061] For example, the tilt angle of scraper 6 is the same as the tilt angle of the blade.

[0062] With the above settings, the material on the end cap 5 can be scraped off by the scraper 6, preventing the material from sticking to the end cap 5.

[0063] In some embodiments, the plane of rotation formed by each scraper 6 when rotating is parallel to the corresponding end cap 5, and the minimum distance between each scraper 6 and the corresponding end cap 5 is N, where 3cm≤N≤8cm.

[0064] For example, the minimum distance N between each scraper 6 and the corresponding end cap 5 can be 3cm, 5cm or 8cm, etc.

[0065] Understandably, the smaller the minimum distance N between the scraper 6 and the corresponding end cap 5, the better the cleaning effect of the scraper 6 on the material on the corresponding end cap 5.

[0066] The above settings ensure that the scraper 6 effectively cleans the material on the corresponding end cap 5 and prevents the scraper 6 from colliding with the end cap 5.

[0067] In some examples, the materials of the stirring shaft 2, the blade 3, and the scraper 6 can be selected according to the physical properties of the material. For example, they can all be made of wear-resistant metal to improve the service life of the stirring shaft 2, the blade 3, and the scraper 6.

[0068] For example, the materials of the stirring shaft 2, the blade 3, and the scraper 6 can all be NM400 wear-resistant steel.

[0069] Example 2:

[0070] This invention also provides a chlorosilane slurry drying device for stirring and drying chlorosilane slurry. The chlorosilane slurry drying device includes the drying agitator and drive unit 7 from Embodiment 1. The heating cylinder 1 of the drying agitator is provided with an inlet and an outlet; the cylinder wall of the heating cylinder 1 has a first jacket, and a heating medium flows through the first jacket to heat the chlorosilane slurry inside the heating cylinder 1, thereby achieving the drying of the chlorosilane slurry. The drive unit 7 is drively connected to the stirring shaft 2 of the drying agitator and is used to drive the stirring shaft 2 to rotate.

[0071] For example, the drive component 7 is a variable frequency motor, which is connected to the stirring shaft 2 via a reducer and a coupling. The drive component 7 can rotate in a first direction or in a second direction.

[0072] In some examples, a second interlayer is provided inside the end cap 5, and a heating medium flows through the second interlayer to heat the end cap 5.

[0073] For example, the heating medium can be water or steam.

[0074] like Figure 1 As shown, the heating cylinder 1 is provided with multiple interfaces for inputting or outputting corresponding substances.

[0075] Among them, N1a and N1b are material feeding ports, used to feed materials into heating cylinder 1; N2a and N2b are steam inlets of heating cylinder 1, used to introduce high-temperature (e.g., 155°C) steam into the first jacket of heating cylinder 1 to heat heating cylinder 1; N3a and N3b are gas phase outlets, used to discharge gaseous products (e.g., silicon tetrachloride, trichlorosilane, and silicon dichloride) generated during material drying; N4 is an inspection port, through which the heating cylinder can be inspected. 1. Internal maintenance is performed; N5a and N5b are steam inlets for end cap 5, used to introduce high-temperature (e.g., 155°C) steam into the second interlayer of end cap 5 to heat end cap 5; N6a and N6b are condensate outlets, used to discharge condensate generated after steam condensation inside end cap 5; N7a and N7b are condensate outlets for heating cylinder 1, used to discharge condensate generated after steam condensation inside heating cylinder 1; N8 is the discharge port, used to discharge the dried material.

[0076] For example, the discharge port N8 is located on the vertical axis of symmetry of the heating cylinder 1 to ensure uniform and smooth discharge and avoid material accumulation and blockage.

[0077] The chlorosilane slurry enters the heating cylinder 1 through the feed inlet. The drive unit 7 rotates in either the first or second direction, which in turn drives the stirring shaft 2 to rotate, causing the chlorosilane slurry to be fully dispersed and moved within the heating cylinder 1. Under the action of the heating medium within the heating cylinder 1, the slurry is heated and dried. The dried solid slurry is then discharged through the discharge outlet of the heating cylinder 1.

[0078] This allows for the drying of chlorosilane slurry, reduces clogging in the chlorosilane slurry drying device, and improves the operating efficiency of the chlorosilane slurry drying device.

[0079] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A drying stirrer, characterized in that, include: Heating cylinder (1), which is horizontally arranged and used to heat the material inside the heating cylinder (1); and, A stirring shaft (2) is rotatably mounted on the axis of the heating cylinder (1), and a plurality of blades (3) are mounted on the stirring shaft (2); the stirring shaft (2) is used to drive the blades (3) to stir the material inside the heating cylinder (1) when rotating; With the vertical axis of symmetry of the heating cylinder (1) as the boundary, the blades (3) on both sides of the vertical axis of symmetry are inclined in opposite directions, so that when the stirring shaft (2) rotates in the first direction, the material in the heating cylinder (1) moves from the middle to both ends of the heating cylinder (1), and when the stirring shaft (2) rotates in the second direction, the material in the heating cylinder (1) moves from both ends to the middle of the heating cylinder (1); wherein, the first direction and the second direction are two opposite rotation directions.

2. The drying stirrer according to claim 1, characterized in that, The angles between the tilting directions of the blades (3) located on both sides of the vertical axis of symmetry of the heating cylinder (1) and the axial direction of the stirring shaft (2) are all equal.

3. The drying stirrer according to claim 2, characterized in that, The angle between the tilting direction of each blade (3) and the axial direction of the stirring shaft (2) is an inclination angle α, where 50°≤α≤60°.

4. The drying stirrer according to claim 2, characterized in that, Each of the blades (3) is fixed to the stirring shaft (2) by a blade shaft (4), and the extension direction of each blade shaft (4) passes through the axis of the stirring shaft (2); Multiple blade shafts (4) are arranged in multiple columns along the axial direction of the stirring shaft (2), with an angle between any two adjacent columns of blade shafts (4), and the angle between any two adjacent columns of blade shafts is equal.

5. The drying stirrer according to claim 4, characterized in that, In each row of blade shafts (4), the horizontal distance between any two adjacent blade shafts (4) is L, 50cm≤L≤75cm.

6. The drying stirrer according to claim 5, characterized in that, Along the axial direction of the stirring shaft (2), any two adjacent rows of blade shafts (4) are staggered; In the axial direction of the stirring shaft (2), in any two rows of staggered blade shafts (4), the horizontal distance between any two adjacent blade shafts (4) is L / 2.

7. The drying stirrer according to claim 4, characterized in that, The outer edge of the blade (3) is arc-shaped, and the minimum distance between any position on the outer edge of each blade (3) and the inner wall of the heating cylinder (1) is M, where 5cm≤M≤10cm.

8. The drying stirrer according to claim 4, characterized in that, The heating cylinder (1) has end caps (5) at both ends; Scrapers (6) are provided on the two blade shafts (4) closest to the end cap (5). Each scraper (6) is located on the side of the blade shaft (4) facing the corresponding end cap (5) and is used to clean the material on the corresponding end cap (5) under the drive of the stirring shaft (2).

9. The drying stirrer according to claim 8, characterized in that, The plane of rotation formed by each scraper (6) during rotation is parallel to the corresponding end cap (5), and the minimum distance between each scraper (6) and the corresponding end cap (5) is N, where 3cm≤N≤8cm.

10. A drying device for chlorosilane slurry, characterized in that, include: The drying agitator according to any one of claims 1-9, wherein the heating cylinder (1) of the drying agitator is provided with an inlet and an outlet; the cylinder wall of the heating cylinder (1) has a first jacket, and a heating medium flows through the first jacket for heating the chlorosilane slurry inside the heating cylinder (1) to achieve drying of the chlorosilane slurry; and, The driving component (7) is connected to the stirring shaft (2) of the dryer and is used to drive the stirring shaft (2) to rotate.

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