A continuous reaction device

Abstract

The present invention discloses a continuous reaction device, including a reaction tube and a reflux mechanism, wherein: the reaction tube has a transverse reaction chamber, the reaction tube is provided with a feed port and a discharge port, the feed port and the discharge port are located at two ends of the reaction tube; the reflux mechanism includes a driving motor, a rotating drum, a rotating rod, a second stirring rod and a reciprocating transmission mechanism, the rotating drum is installed in the reaction chamber for transverse rotation, the driving motor is installed on the reaction tube and is used to drive the rotating drum to rotate, the rotating rod is installed in the rotating drum for transverse sliding, and the rotating rod rotates with the rotating drum, the rotating rod is close to the discharge port relative to the rotating drum, the reciprocating transmission mechanism is installed between the rotating drum and the rotating rod and is used to drive the rotating rod to slide transversely relative to the rotating drum, and the second stirring rod is installed on the outer wall of the rotating rod. In the present invention, the material flowing to the discharge port is refluxed by the setting of the reflux mechanism, thereby increasing the reaction time of the material in the reaction chamber.

Description

Technical Field

[0001] The invention relates to the technical field of chemical reaction processing equipment, in particular to a continuous reaction device. Background Art

[0002] When the decarbonization mother liquor is produced by the chemical reaction of sulfuric acid and lithium precipitation mother liquor, an intermittent reaction device is often used. Sulfuric acid and lithium precipitation mother liquor are respectively input into the reaction device intermittently to ensure the reaction efficiency of sulfuric acid and lithium precipitation mother liquor. This method has high equipment investment cost and low production efficiency, and has low benefits in large-scale production. Therefore, a continuous reaction device is generally used for the chemical reaction production of sulfuric acid and lithium precipitation mother liquor.

[0003] When the existing continuous reaction device is in production, the sulfuric acid and lithium precipitation mother liquor in the reaction zone will flow toward the discharge port along the circulation of the pipeline, which will reduce the reaction time and may cause the reaction efficiency between sulfuric acid and lithium precipitation mother liquor to be low, thereby reducing the overall production efficiency of the device; in view of this, we propose a continuous reaction device. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the present invention provides a continuous reaction device.

[0005] The present invention provides a continuous reaction device, comprising a reaction tube and a reflux mechanism, wherein:

[0006] The reaction tube has a transverse reaction chamber, and a feed inlet and a discharge inlet are provided on the reaction tube, wherein the feed inlet and the discharge inlet are located at two ends of the reaction tube;

[0007] The reflux mechanism comprises a rotating drum, a rotating rod, a second stirring rod and a reciprocating transmission mechanism, wherein the rotating drum is installed in the reaction chamber in a transversely rotating manner, the rotating rod is installed in the rotating drum in a transversely sliding manner, and the rotating rod rotates with the rotating drum, the rotating rod is close to the discharge port relative to the rotating drum, the reciprocating transmission mechanism is installed between the rotating drum and the rotating rod and is used to drive the rotating rod to slide transversely relative to the rotating drum, and the second stirring rod is installed on the outer wall of the rotating rod;

[0008] Stirring can be achieved by manually rotating the drum. As a further optimized solution of the present invention, it also includes a driving motor, which is installed on the reaction tube and is used to drive the drum to rotate, thereby reducing labor intensity.

[0009] Different from any of the above-mentioned technical solutions, a further optimized solution of the present invention is that: the reciprocating transmission mechanism includes an elastic reset member and a limiting structure, one end of the elastic reset member is installed at one end of the rotating rod close to the rotating cylinder, and the other end of the elastic reset member is installed on the rotating cylinder, the elastic reset member can undergo elastic deformation along the axial direction of the rotating cylinder, and the limiting mechanism is installed on the inner wall of the reaction chamber and is used to limit the lateral movement direction of the rotating rod relative to the rotating cylinder.

[0010] Different from any of the above technical solutions, a further optimized solution of the present invention is that: the limiting mechanism is a fixed rod, the fixed rod is fixed to the inner wall of the reaction chamber along the radial direction of the reaction chamber, a sliding hole is opened on the fixed rod, and the end of the rotating rod away from the rotating cylinder passes through the sliding hole.

[0011] Different from any of the above technical solutions, a further optimized solution of the present invention is that: the rotating rod and the fixed rod are in point contact.

[0012] Different from any of the above technical solutions, a further optimized solution of the present invention is that: a guide slope is provided in the reaction chamber, the guide slope is located directly below the feed port, and the guide slope is a slope that gradually inclines from top to bottom toward the discharge port.

[0013] Different from any of the above technical solutions, a further optimized solution of the present invention is that it also includes a pretreatment cylinder, which is installed on the reaction tube, and the pretreatment cylinder has a premixing chamber, which is connected to the feed port, and the pretreatment cylinder is provided with a sulfuric acid feed port and a lithium precipitation mother liquor feed port, and the sulfuric acid feed port and the lithium precipitation mother liquor feed port are both connected to the premixing chamber.

[0014] Different from any of the above technical solutions, a further optimized solution of the present invention is that: it also includes a pre-mixing mechanism, which is installed in the pre-mixing chamber and stirs the materials in the pre-mixing chamber.

[0015] Different from any of the above technical solutions, a further optimized solution of the present invention is that: the premixing mechanism includes a rotating column, a splash guard and a transmission mechanism; the rotating column is vertically rotatably installed on the pretreatment cylinder and extends into the premixing chamber; the transmission mechanism is installed between the rotating column and the rotating drum; the rotation of the rotating drum drives the rotating column to rotate through the transmission mechanism; the splash guard is installed on the rotating column and is located below the sulfuric acid feed port and the lithium precipitation mother liquor feed port; there is a material dropping gap between the outer wall of the splash guard and the inner wall of the premixing chamber.

[0016] Different from any of the above technical solutions, a further optimized solution of the present invention is that it also includes a scraper plate and a connecting rod, the scraper plate is connected to the outer wall of the rotating column through the connecting rod, the scraper plate is in contact with the inner wall of the premixing chamber, and the scraper plate is located above the splash plate and below the sulfuric acid feed port and the lithium precipitation mother liquor feed port.

[0017] Different from any of the above technical solutions, a further optimized solution of the present invention is that it also includes a shielding plate and an adjusting drive component, the shielding plate is installed in the premixing chamber for transverse sliding, the shielding plate has a part extending into the premixing chamber and a part located outside the premixing chamber, and a drop opening is formed between the shielding plate and the inner wall of the premixing chamber, and the adjusting drive component is installed on the pretreatment cylinder and is used to drive the shielding plate to move horizontally to adjust the size of the drop opening.

[0018] In the present invention, the continuous reaction device proposed enables the material flowing to the discharge port to reflux by setting a reflux mechanism, thereby increasing the reaction time of the material in the reaction chamber and further increasing the reaction efficiency.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the present invention;

[0022] Figure 3 It is a partial enlarged view of the A area of ​​the present invention;

[0023] Figure 4 It is a partial enlarged view of area B of the present invention. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] like Figure 1-4 A continuous reaction device shown includes a reaction tube 1, a pretreatment tube 2 and a reflux mechanism, wherein:

[0030] The reaction tube 1 has a transverse reaction chamber 10, a feed port 11 is provided at one end close to the reaction tube 1, and a discharge port 5 is provided at the other end of the reaction tube 1. The feed port 11 is provided on the side wall of the reaction tube 1, and the feed port 11 and the discharge port 5 are both connected to the reaction chamber 10, and a discharge valve can be provided at the discharge port 5 to control the discharge flow rate (not shown in the figure);

[0031] The pretreatment barrel 2 is installed on the reaction tube 1. Specifically, the pretreatment barrel 2 is fixed to the outer wall of the pretreatment barrel 2 by welding. The pretreatment barrel 2 has a premixing chamber 20. The premixing chamber 20 is connected to the feed port 11, thereby realizing the connection between the premixing chamber 20 and the reaction chamber 10.

[0032] The pretreatment cylinder 2 has a sulfuric acid feed port 4 and a lithium precipitation mother liquor feed port 3, both of which are connected to the upper half of the premixing chamber 20. The sulfuric acid feed port 4 is used to feed sulfuric acid, and the lithium precipitation mother liquor feed port 3 is used to feed lithium precipitation mother liquor.

[0033] The materials enter the premixing chamber 20 of the pretreatment cylinder 2 through the sulfuric acid feed port 4 and the lithium precipitation mother solution feed port 3 for premixing, and then are discharged into the reaction chamber 10 through the feed port 11;

[0034] In some embodiments, the reaction chamber 10 preferably has a guide slope, which is located directly below the feed port 11, and is a slope that gradually tilts from top to bottom toward the discharge port 5;

[0035] In some embodiments, it is preferred that a shielding plate 18 and an adjusting driving member 19 are further included. The shielding plate 18 is installed in a transverse sliding manner in the pre-mixing chamber 20, specifically located in the lower half of the pre-mixing chamber 20. The shielding plate 18 has a portion extending into the pre-mixing chamber 20 and a portion located outside the pre-mixing chamber 20. A material drop opening is formed between the shielding plate 18 and the inner wall of the pre-mixing chamber 20. The adjusting driving member 19 is installed on the pre-treatment barrel 2 and is used to drive the shielding plate 18 to move horizontally, thereby adjusting the size of the material drop opening. Specifically, the adjusting driving member 19 can be a structure that can drive a component to move horizontally, such as an electric cylinder, an electric push rod or a cylinder in the prior art. In this embodiment, the adjusting driving member 19 is an electric push rod;

[0036] In some embodiments, preferably, the shielding plates 18 and the adjusting driving members 19 are provided with two groups, one group of shielding plates 18 is connected to one group of adjusting driving members 19, the two groups of shielding plates 18 are arranged opposite to each other, and a material drop opening is formed between the two groups of shielding plates 18 and the inner wall of the premixing chamber 20, and the two groups of adjusting driving members 19 drive the two groups of shielding plates 18 to move to change the distance between the two groups of shielding plates 18, thereby adjusting the size of the material drop opening;

[0037] The reflux mechanism includes a driving motor 6, a rotating drum 7, a rotating rod 8, a second stirring rod 9 and a reciprocating transmission mechanism. The rotating drum 7 is installed on the reaction tube 1 for transverse rotation, and the driving motor 6 is installed on the reaction tube 1 and is used to drive the rotating drum 7 to rotate. The rotating drum 7 is close to the feed port 11 relative to the rotating rod 8. The rotating rod 8 is installed in the rotating drum 7 for transverse sliding. The rotating rod 8 is close to the discharge port 5 relative to the rotating drum 7. The reciprocating transmission mechanism is installed between the rotating drum 7 and the rotating rod 8 and is used to drive the rotating rod 8 to slide transversely relative to the rotating drum 7. Specifically, the rotating drum 7 has a central hole coaxial with the rotating drum 7, and the rotating rod 8 is installed in the rotating drum 7 for transverse sliding. 8 is slidably installed in the rotating drum 7 along the axial direction of the rotating drum 7, a sliding bar is provided on the inner wall of the central hole of the rotating drum 7, a sliding groove is provided on the outer wall of the rotating rod 8, and the sliding groove matches the sliding bar. When the rotating rod 8 slides in the rotating drum 7, the rotating rod 8 rotates with the rotating drum 7. The second stirring rod 9 is installed on the outer wall of the rotating rod 8. There are multiple second stirring rods 9. In some embodiments, preferably, the second stirring rod 9 gradually tilts from one end close to the rotating rod 8 to the end away from the rotating rod 8 toward the side close to the feeding port 11, so as to further increase the stirring effect and the effect of the mixed liquid reflux;

[0038] The reciprocating transmission mechanism can be a structure in the prior art that can drive the rotating rod 8 to slide horizontally relative to the rotating drum 7. In the present embodiment, preferably, the reciprocating transmission mechanism includes an elastic reset member 12 and a limiting structure. Specifically, the elastic reset member 12 is a reset spring. One end of the elastic reset member 12 is installed at one end of the rotating rod 8 close to the rotating drum 7, and the other end of the elastic reset member 12 is installed on the rotating drum 7. The elastic reset member 12 can be elastically deformed along the axial direction of the rotating drum 7. The limiting mechanism is installed on the inner wall of the reaction chamber 10. The limiting mechanism is used to limit the lateral movement direction of the rotating rod 8 relative to the rotating drum 7 to prevent the rotating rod 8 from separating from the rotating drum 7. Specifically, the limiting mechanism is a fixed rod 13. The fixed rod 13 is installed on the inner wall of the reaction chamber 10 along the radial direction of the reaction tube 1. The fixed rod 13 limits the lateral movement of the rotating rod 8. When the liquid flow impact in the reaction chamber 10 causes the rotating rod 8 to move away from the rotating drum 7, the fixed rod 13 is used to limit the lateral movement of the rotating rod 8. The movement of the rotating drum 7, that is, the rotating rod 8 moves away from the feeding port 11, stretching the elastic reset member 12, and when the elastic reset member 12 is stretched to a certain length and the rotating rod 8 has not separated from the rotating drum 7, the structure on the rotating rod 8 collides with the fixed rod 13, and under the action of the elastic reset member 12's own restoring force and the reaction force of the fixed rod 13 on the rotating rod 8, the rotating rod 8 moves toward the feeding port 11. Specifically, a sliding hole is opened on the fixed rod 13, and the rotating rod 8 passes through the sliding hole and is slidably connected to the sliding hole, further guiding the movement of the rotating rod 8, and a contact ball 25 is provided on the rotating rod 8. Specifically, a contact slide bar 26 is fixed on the rotating rod 8 along its radial direction, and the contact ball 25 is fixed on the contact slide bar 26 and is opposite to the fixed rod 13. The contact ball 25 collides with the fixed rod 13, so that the contact ball 25 and the fixed rod 13 are in point contact, thereby increasing the pressure on the rotating rod 8;

[0039] In order to prevent the elastic reset member 12 from deforming and deviating, in some embodiments, a limit assembly is further included, the limit assembly includes a limit column 29 and a sliding column 30, the limit column 29 is fixed on the rotating drum 7 and is coaxial with the rotating drum 7, the sliding column 30 is fixed to the end of the rotating rod 8 opposite to the rotating drum 7, and the end of the sliding column 30 away from the rotating rod 8 is slidably installed in the limit column 29, when the rotating rod 8 moves relative to the rotating drum 7, the sliding column 30 moves in the limit column 29, and the reset spring is sleeved outside the limit assembly;

[0040] In some embodiments, preferably, a first stirring rod 23 is provided on the outside of the drum 7, and the first stirring rod 23 is arranged along the radial direction of the drum 7. A spoiler rod 24 is provided on the inner wall of the reaction chamber 10 along its radial direction. A plurality of spoiler rods 24 and a plurality of first stirring rods 23 are provided, and the first stirring rods 23 and the spoiler rods 24 are staggered and distributed in the reaction chamber 10, so as to further increase the liquid mixing efficiency.

[0041] In some embodiments, it is preferred that a premixing mechanism is further included, and the premixing mechanism is installed in the premixing chamber 20 and stirs the materials in the premixing chamber 20;

[0042] Specifically, the premixing mechanism includes a rotating column 14, a splash plate 15 and a transmission mechanism. The rotating column 14 is vertically rotatably installed on the pretreatment cylinder 2 and extends into the premixing chamber 20. The transmission mechanism is installed between the rotating column 14 and the rotating drum 7. The rotating drum 7 rotates through the transmission mechanism to drive the rotating column 14 to rotate. The splash plate 15 is installed on the rotating column 14, and the splash plate 15 is conical. There is a blanking gap between the outer wall of the splash plate 15 and the inner wall of the premixing chamber 20. The shielding plate 18 is located below the blanking gap. In order to further increase the premixing effect, the upper surface of the splash plate 15 is an inclined surface that gradually tilts downward from one end close to the axis of the rotating column 14 to one end away from the axis of the rotating column 14.

[0043] The transmission mechanism is a bevel gear transmission mechanism, which includes a first bevel gear 27 and a second bevel gear 28. The first bevel gear 27 is mounted on the rotating drum 7, and the second bevel gear 28 is mounted on the rotating column 14. The first bevel gear 27 and the second bevel gear 28 are meshed.

[0044] In some embodiments, it is preferred that a scraper plate 16 and a connecting rod 17 are further included. The scraper plate 16 is connected to the outer wall of the rotating column 14 through the connecting rod 17. The scraper plate 16 contacts the inner wall of the pre-mixing chamber 20. During the rotation of the rotating column 14, the scraper plate 16 scrapes the inner wall of the mixing chamber. The scraper plate 16 is located above the splash plate 15 and below the sulfuric acid feed port 4 and the lithium precipitation mother liquor feed port 3.

[0045] Preferably, in some embodiments, a controller 21 and a pH detector 22 are further included. The pH detector 22 is installed at a position near the discharge port 5 of the reaction chamber 10 and is used to detect the pH value of the material in the reaction chamber 10. The pH detector 22 is connected to the controller 21 and transmits the detected value to the controller 21. The controller 21 is connected to the adjusting drive member 19 and controls the movement of the adjusting drive member 19 to control the size of the discharge port, thereby controlling the flow rate of the liquid in the premixing chamber 20 entering the reaction chamber 10, further increasing its mixing efficiency.

[0046] This embodiment includes all the above-mentioned features. During the working process: the lithium precipitation mother liquor is fed into the pretreatment chamber through the lithium precipitation mother liquor feed port 3 and the sulfuric acid is fed into the sulfuric acid feed port 4, and contacts with the splash plate 15, and enters the feed port 11 through the drop port, and enters the reaction chamber 10 through the feed port 11. During this process, the driving motor 6 drives the rotating drum 7 to rotate, and the rotating drum 7 drives the rotating column 14 to rotate through the bevel gear transmission mechanism. The rotation of the rotating column 14 drives the connecting rod 17 and the splash plate 15 to rotate, further increasing the effect of material mixing. At the same time, the scraper plate scrapes the inner wall of the premixing chamber 20 to prevent the material from sticking to the inner wall of the premixing chamber 20, further increasing the premixing effect.

[0047] The material entering the reaction chamber 10 collides with the guide slope under the action of its own gravity, so that the material flows toward the discharge port 5. The material is mixed again under the interaction of the first stirring rod 23 and the spoiler rod 24. When the material continues to move toward the discharge port 5, the material collides with the second stirring rod 9, so that the rotating rod 8 moves toward the discharge port 5. During this process, the return spring is stretched, the rotating rod 8 moves in the rotating drum 7, and the rotating rod 8 rotates with the rotating drum 7 until the contact ball 25 collides with the fixed rod 13. Under the action of the reaction force of the fixed rod 13 on the rotating rod 8 and the restoring force of the return spring, the rotating rod 8 moves toward the feed port 11, so that the material refluxes, increasing the reaction time. In this process, the second stirring rod 9, the first stirring rod 23 and the spoiler rod 24 are arranged to increase the material mixing effect.

[0048] The pH detector 22 monitors the pH value of the material discharged from the discharge port 5 in real time. The pH detector 22 is connected to the controller 21 and transmits the detected value to the controller 21. The controller 21 is connected to the adjustment drive 19 and controls the action of the adjustment drive 19 to control the size of the discharge port, thereby controlling the flow rate of the liquid in the premixing chamber 20 entering the reaction chamber 10, further increasing its mixing efficiency.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A continuous reaction device, characterized in that: It comprises a reaction tube (1), a rotating drum (7), a rotating rod (8), a second stirring rod (9) and a reciprocating transmission mechanism, wherein: The reaction tube (1) has a transverse reaction chamber (10) with a feed inlet (11) and a discharge port (5), wherein the feed inlet (11) and the discharge port (5) are located at two ends of the reaction tube (1); The rotating cylinder (7) is installed in the reaction chamber (10) for transverse rotation, the rotating rod (8) is installed in the rotating cylinder (7) for transverse sliding and rotates with the rotating cylinder (7), the reciprocating transmission mechanism is installed between the rotating cylinder (7) and the rotating rod (8) and is used to drive the rotating rod (8) to slide transversely relative to the rotating cylinder (7), and the second stirring rod (9) is installed on the outer wall of the rotating rod (8); The reciprocating transmission mechanism comprises an elastic reset member (12) and a limiting mechanism, one end of the elastic reset member (12) is mounted on an end of the rotating rod (8) close to the rotating drum (7), and the other end of the elastic reset member (12) is mounted on the rotating drum (7), the elastic reset member (12) can be elastically deformed along the axial direction of the rotating drum (7), and the limiting mechanism is mounted on the inner wall of the reaction chamber (10) and is used to limit the lateral movement direction of the rotating rod (8) relative to the rotating drum (7); The limiting mechanism is a fixing rod (13), the fixing rod (13) being fixed to the inner wall of the reaction chamber (10) along the radial direction of the reaction chamber (10), the fixing rod (13) being provided with a sliding hole, and an end of the rotating rod (8) away from the rotating cylinder (7) passing through the sliding hole; The reaction chamber (10) has a guiding slope, the guiding slope is located directly below the feed port (11), and the guiding slope is a slope that gradually inclines from top to bottom toward the discharge port (5).

2. The continuous reaction device according to claim 1, characterized in that: The rotating rod (8) and the fixing rod (13) are in point contact.

3. The continuous reaction device according to any one of claims 1 to 2, characterized in that: The invention also comprises a pretreatment barrel (2), wherein the pretreatment barrel (2) is mounted on the reaction tube (1), the pretreatment barrel (2) has a premixing chamber (20), the premixing chamber (20) is connected to the feed port (11), and the pretreatment barrel (2) is provided with a sulfuric acid feed port (4) and a lithium precipitation mother liquor feed port (3), and the sulfuric acid feed port (4) and the lithium precipitation mother liquor feed port (3) are both connected to the premixing chamber (20).

4. The continuous reaction device according to claim 3, characterized in that: It also comprises a premixing mechanism, which is installed in the premixing chamber (20) and stirs the material in the premixing chamber (20).

5. The continuous reaction device according to claim 4, characterized in that: The premixing mechanism comprises a rotating column (14), a splash plate (15) and a transmission mechanism. The rotating column (14) is vertically rotatably mounted on the pretreatment cylinder (2) and extends into the premixing chamber (20). The transmission mechanism is mounted between the rotating column (14) and the rotating drum (7). The rotating drum (7) rotates to drive the rotating column (14) to rotate through the transmission mechanism. The splash plate (15) is mounted on the rotating column (14) and is located below the sulfuric acid feed port (4) and the lithium precipitation mother liquor feed port (3). There is a material drop gap between the outer wall of the splash plate (15) and the inner wall of the premixing chamber (20).

6. The continuous reaction device according to claim 5, characterized in that: It also includes a scraper plate (16) and a connecting rod (17), wherein the scraper plate (16) is connected to the outer wall of the rotating column (14) via the connecting rod (17), the scraper plate (16) is in contact with the inner wall of the premixing chamber (20), and the scraper plate (16) is located above the splash plate (15) and below the sulfuric acid feed port (4) and the lithium precipitation mother liquor feed port (3).

7. The continuous reaction device according to claim 4, characterized in that: It also includes a shielding plate (18) and an adjusting drive member (19), wherein the shielding plate (18) is installed in a transversely sliding manner in the pre-mixing chamber (20), the shielding plate (18) has a portion extending into the pre-mixing chamber (20) and a portion located outside the pre-mixing chamber (20), and a material drop opening is formed between the shielding plate (18) and the inner wall of the pre-mixing chamber (20), and the adjusting drive member (19) is installed on the pre-treatment barrel (2) and is used to drive the shielding plate (18) to move horizontally to adjust the size of the material drop opening.

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