Double-rotor homogenizing equipment and control method thereof

Abstract

The invention discloses a double-rotor homogenizing device and a control method thereof.The double-rotor homogenizing device comprises a first rotor and a second rotor which are concentrically arranged, under the condition that a gap structure is not changed and motor output is not improved, the relative speed between the double rotors is increased, shearing force is improved, and therefore the homogenizing effect is improved, and the service life of the double-rotor homogenizing device is prolonged. And meanwhile, three different control modes are realized by adjusting the rotating direction and the rotating speed of the double rotors, so that the double-rotor homogenizer can be suitable for various occasions required by different homogenizing effects.

Description

Technical Field

[0001] The present invention relates to the field of homogenization equipment, and particularly to a homogenization equipment with a double rotor and its control method. Background Art

[0002] A homogenization equipment is an industrial equipment used to uniformly disperse, break, and emulsify liquids or liquid-solid mixtures with different components, and is widely used in fields such as food, pharmaceuticals, chemicals, and cosmetics. Generally, a homogenization equipment includes a rotating rotor and a non-rotating stator. The rotor rotates at a high speed around the stator, and a large shear force is generated in the gap between the rotor and the stator. The liquid or liquid-solid mixture is uniformly dispersed, broken, and emulsified through the shear force. Generally, there are two means to improve the homogenization effect. One is to reduce the gap, and the other is to increase the rotational speed of the rotor. However, the gap is affected by machining accuracy and transmission, and there is a physical limit. Similarly, the rotational speed is affected by transmission and the sealing structure, and there is also a limit. Therefore, how to further improve the homogenization effect is a difficult problem faced by each manufacturer. In response to this technical problem, the present application proposes a solution. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to provide a homogenization equipment with a double rotor and its control method, which can improve the homogenization effect and can be applied to the field of continuous manufacturing to improve the efficiency of continuous manufacturing.

[0004] Technical Solution: A homogenization equipment with a double rotor according to the present invention is characterized in that: it includes two concentrically arranged first rotor and second rotor. The first rotor and the second rotor are respectively externally connected with a first homogenization motor and a second homogenization motor through shafts. A pressure impeller for pressing the material and a crushing impeller for crushing the material are arranged on the shaft of the first rotor along the direction of the first rotor towards the motor. The second rotor is arranged outside the first rotor, and a discharge impeller for discharging materials concentric with the second rotor and / or the first rotor is further arranged outside the second rotor.

[0005] Through the setting of the double rotor, controlling the different rotational speeds and directions between the rotors can realize a wider range of adjustment of the shear force. Without a higher-input motor, only by controlling the reverse rotation of the double rotor, the relative speed between the double rotors can be doubled without adjusting the motor input, thereby increasing the shear force and improving the homogenization effect.

[0006] At the same time, when the relative speed between the double rotors remains unchanged, the rotational speeds of the double rotors are simultaneously reduced or increased, thereby reducing or increasing the homogenization efficiency. It can change the output of continuous manufacturing while ensuring the same homogenization effect, and is applicable to the field of continuous manufacturing.

[0007] Preferably, it further includes a housing which encloses a first rotor, a second rotor, a material pressing impeller, a crushing impeller and a discharging impeller. The shaft extends out of the housing, and a mechanical seal is provided between the shaft and the housing.

[0008] The housing is provided for sealingly accommodating all the homogenization fittings inside.

[0009] Preferably, the housing includes a first housing and a second housing. The first housing and the second housing are sealingly connected by a flange. The first housing is located between the first rotor and the first homogenization motor, and the second housing is located between the second rotor and the second homogenization motor.

[0010] Preferably, a material inlet connecting the tank body is provided at the top of the first housing, a first discharge outlet is provided at the bottom, and a feed inlet connecting the unpretreated material to enter is provided laterally.

[0011] The material inlet is connected to the tank body to inject the pretreated material into the housing. The first discharge outlet is provided for completely emptying the residual material inside the housing after one homogenization operation. The feed inlet is provided for injecting the material that does not require pretreatment into the housing. When injecting the material that does not require pretreatment and cannot withstand the shear force, the two rotors maintain the working state of the same direction and the same speed, and at this time, the equipment only plays the role of mixing and stirring; when injecting the material that does not require pretreatment and can withstand the shear force, at this time, the two rotors rotate in the same direction and the same speed, in the same direction but at different speeds or in the reverse direction, and at this time, the equipment plays the role of homogenization and mixing and stirring.

[0012] Preferably, a circulation port connecting the circulation pipeline is provided at the top of the second housing, and a second discharge outlet is provided at the bottom.

[0013] The second discharge outlet is used for discharging the material after homogenization, and the circulation port is used for transporting the homogenized material back into the tank body or discharging it to the next process section.

[0014] Preferably, a plurality of mutually parallel first inclined ports are uniformly provided on the radially outer wall of the first rotor, and a plurality of mutually parallel second inclined ports are uniformly provided on the radially outer wall of the second rotor. The first inclined ports and the second inclined ports are staggered with each other when the first rotor and the second rotor are rotationally installed on the homogenization equipment.

[0015] The first inclined ports and the second inclined ports are provided for discharging the material from the rotor. The staggered arrangement of the first inclined ports and the second inclined ports can change the flow direction of the material when passing through the gap between the first rotor and the second rotor, so that the shear force acts better on the material and improves the homogenization effect.

[0016] Preferably, both the crushing impeller and the material pressing impeller are arc-shaped blades. Cutting edges are provided at both the leading edge and the trailing edge of the crushing impeller, and the axial length of the material pressing impeller is longer than the axial length of the crushing impeller.

[0017] The arc-shaped blades are used to guide the flow direction of the material, and the design of the cutting edges on the crushing impeller is used to crush and shear the incoming material, improving the subsequent homogenization effect.

[0018] Preferably, the discharge impeller includes teeth, a ring, and a connecting rod. The ring is connected to the shaft connected to the first rotor through the connecting rod. A plurality of teeth are evenly distributed on the end face of the ring facing the second rotor. The length of the teeth is the same as the axial length of the second rotor so that the discharge impeller wraps around the axial end face of the second rotor.

[0019] The setting of the discharge impeller evenly introduces the homogenized material discharged from the second inclined port of the second rotor into the second discharge port for subsequent use. At the same time, in the shear-free mode, it acts as a pump. When injecting active materials that cannot withstand shear force into the housing, these materials are evenly stirred inside the housing and then guided out of the housing by the discharge impeller and discharged through the second discharge port.

[0020] A control method for a double-rotor homogenization device, characterized in that it includes the following three control methods:

[0021] A: Shear-free mode: The first homogenization motor and the second homogenization motor respectively control the first rotor and the second rotor to rotate in the same direction and at the same speed.

[0022] B: High-shear force mode: The first homogenization motor and the second homogenization motor respectively control the first rotor and the second rotor to rotate in opposite directions.

[0023] C: Low-shear force mode: The first homogenization motor and the second homogenization motor respectively control the first rotor and the second rotor to rotate in the same direction but at different speeds.

[0024] In the shear-free mode, the homogenization device acts as a stirrer for the material. At this time, it is used to stir the active material that cannot withstand shear force, and the stirred active material is guided to the second discharge port by the discharge impeller and discharged.

[0025] In the high-shear force mode, without increasing the motor input, the homogenization device controls the double rotors to rotate in opposite directions, which can double the relative speed between the double rotors, thereby increasing the shear force and improving the homogenization effect.

[0026] In the low-shear force mode, the homogenization effect of a traditional homogenization device is achieved.

[0027] Preferably, in the shear-free mode, high-shear force mode, or low-shear force mode, when the first homogenization motor and the second homogenization motor control the first rotor and the second rotor to maintain a constant relative speed, the outputs of the first homogenization motor and the second homogenization motor are adjusted simultaneously to reduce or increase the homogenization speed of the homogenization device.

[0028] By ensuring the constancy of the relative speed between the first rotor and the second rotor, the consistency of the homogenized material is ensured, which can be used in continuous production scenarios without the need to use an additional storage tank to store the homogenized material and wait for subsequent production lines to use it.

[0029] Advantageous effects: Compared with the prior art, the present invention has the following remarkable advantages:

[0030] (1) Through the setting of the double rotors, without changing the gap structure and without increasing the motor output, the relative speed between the double rotors can be doubled, the shearing force can be increased, and thus the homogenization effect can be improved;

[0031] (2) By adjusting the rotation directions and speeds of the double rotors, three different control modes are realized, which can be applicable to various occasions requiring different homogenization effects;

[0032] (3) By ensuring the constancy of the relative speed between the first rotor and the second rotor, the consistency of the discharged material is ensured. Only by simultaneously reducing or increasing the input of the homogenization motor, the homogenization speed of the homogenization equipment can be adjusted while ensuring the consistency of the discharged material, which can be applicable to continuous production scenarios without the need to use an additional storage tank to store the homogenized material, and the discharged material can be directly provided for subsequent production lines in continuous production to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0034] Figure 2 is a front view of the present invention.

[0035] Figure 3 is a front cross-sectional view of the present invention.

[0036] Figure 4 is a three-dimensional structural schematic diagram of the present invention after removing the housing.

[0037] Figure 5 is a partially enlarged view on the right side of the present invention after removing the housing.

[0038] Figure 6 is a partially enlarged view on the left side of the present invention after removing the housing.

[0039] Wherein: 1. First rotor; 2. Second rotor; 3. First homogenization motor; 4. Second homogenization motor; 5. Pressing impeller; 6. Crushing impeller; 7. Discharging impeller; 8. First housing; 9. Second housing; 10. Flange; 11. Material port; 12. First discharge port; 13. Feed port; 14. Circulation port; 15. Second discharge port; 16. First inclined port; 17. Second inclined port; 18. Tooth; 19. Ring; 20. Connecting rod; 21. Cutting edge. Detailed implementation mode

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0041] Embodiment 1:

[0042] See the attached Figures 1 to 6 Figure. The double-rotor homogenizing device in the present invention includes two concentrically arranged first rotors 1 and second rotors 2. The first rotor 1 and the second rotor 2 are respectively externally connected to a first homogenizing motor 3 and a second homogenizing motor 4 through shafts. On the shaft of the first rotor 1, a pressing impeller 5 for pressing the material and a crushing impeller 6 for crushing the material are arranged along the direction of the first rotor 1 towards the first motor 3. The second rotor 2 is arranged outside the first rotor 1, and a discharging impeller 7 concentric with the second rotor 2 is further arranged outside the second rotor 2.

[0043] Through the setting of the double rotors, controlling the different rotational speeds and directions between the rotors can achieve a wider range of adjustment of the shear force. There is no need for a motor with a higher input. Only by controlling the reverse rotation of the double rotors, the relative speed between the double rotors can be doubled without adjusting the motor input, thereby increasing the shear force and improving the homogenization effect. At the same time, when the relative speed between the double rotors remains unchanged, the rotational speeds of the double rotors are reduced or increased simultaneously, thereby reducing or increasing the homogenization efficiency. It is possible to change the continuous manufacturing output while ensuring the same homogenization effect, and it is applicable to the field of continuous manufacturing.

[0044] In this embodiment, there is also a housing that encloses the first rotor 1, the second rotor 2, the pressing impeller 5, the crushing impeller 6, and the discharging impeller 7. The shaft extends out of the housing, and a mechanical seal is arranged between the shaft and the housing. The housing is used to seal and accommodate all homogenizing fittings inside.

[0045] In this embodiment, the housing includes a first housing 8 and a second housing 9. The first housing 8 and the second housing 9 are hermetically connected through a flange 10. The first housing 8 is located between the first rotor 1 and the first homogenizing motor 3, and the second housing 9 is located between the second rotor 2 and the second homogenizing motor 4.

[0046] In this embodiment, a material inlet 11 connecting to the tank body is provided at the top of the first housing 8, a first discharge port 12 is provided at the bottom, and a feed inlet 13 for connecting materials that cannot withstand shear force to enter is provided laterally. The material inlet 11 is connected to the tank body to inject pre-treated materials into the housing. The first discharge port 12 is provided to completely empty the remaining materials inside the housing after a single homogenization operation. The feed inlet 13 is provided to inject materials that do not require pre-treatment into the housing. When injecting materials that do not require pre-treatment and cannot withstand shear force, the two rotors maintain the working state of rotating in the same direction and at the same speed. At this time, the equipment only plays the role of mixing and stirring; when injecting materials that do not require pre-treatment and can withstand shear force, at this time, the two rotors rotate in the same direction and at the same speed, in the same direction but at different speeds, or in the reverse direction. At this time, the equipment plays the role of homogenization and mixing and stirring.

[0047] In this embodiment, a circulation port 14 connecting to the circulation pipeline is provided at the top of the second housing 9, and a second discharge port 15 is provided at the bottom. The second discharge port 15 is used to discharge the materials after homogenization, and the circulation port 14 is used to transport the homogenized materials back into the tank body or discharge them to the next process section.

[0048] In this embodiment, a plurality of mutually parallel first inclined ports 16 are uniformly provided on the radially outer wall of the first rotor 1, and a plurality of mutually parallel second inclined ports 17 are uniformly provided on the radially outer wall of the second rotor 2. The first inclined ports 16 and the second inclined ports 17 are staggered with each other when the first rotor 1 and the second rotor 2 are rotatably installed on the homogenization equipment. The first inclined ports 16 and the second inclined ports 17 are provided for discharging materials from the rotors. The staggered arrangement of the first inclined ports 16 and the second inclined ports 17 can change the flow direction of the materials when passing through the gap between the first rotor 1 and the second rotor 2, so that the shear force acts on the materials better and improves the homogenization effect.

[0049] In this embodiment, both the crushing impeller 6 and the pressing impeller 5 are arc-shaped blades. The leading edge and the trailing edge of the crushing impeller 6 are both provided with cutting edges 21. The axial length of the pressing impeller 5 is longer than the axial length of the crushing impeller 6. The arc-shaped blades are used to guide the flow direction of the materials. The design of the cutting edges 21 on the crushing impeller 6 is used to crush and shear the incoming materials to improve the subsequent homogenization effect.

[0050] In this embodiment, the discharging impeller 7 includes teeth 18, a ring 19, and a connecting rod 20. The ring 19 is connected to the shaft connected to the first rotor 1 through the connecting rod 20. A plurality of teeth 18 are evenly distributed on the end face of the ring 19 facing the second rotor 2. The length of the teeth 18 is the same as the axial length of the second rotor 2 so that the discharging impeller 7 wraps the axial end face of the second rotor 2. The discharging impeller 7 guides the homogenized material discharged from the second inclined port 16 of the second rotor 2 into the second discharging port 15 evenly for subsequent use at the rear end. At the same time, in the shear - free mode, it acts as a pump. When injecting active materials that cannot withstand shear force into the housing, these materials are evenly stirred inside the housing and then guided out of the housing by the discharging impeller 7 and discharged through the second discharging port 15.

[0051] Embodiment 2:

[0052] The control methods of the double - rotor homogenization equipment include the following three control methods:

[0053] A: Shear - free mode: The first homogenization motor 3 and the second homogenization motor 4 respectively control the first rotor 1 and the second rotor 2 to rotate in the same direction at the same speed.

[0054] In the shear - free mode, the homogenization equipment acts as a stirrer for the material. At this time, it is used to stir the active material that cannot withstand shear force, and the stirred active material is guided to the second discharging port 15 by the discharging impeller 7 for discharge.

[0055] B: High - shear - force mode: The first homogenization motor 3 and the second homogenization motor 4 respectively control the first rotor 1 and the second rotor 2 to rotate reversely.

[0056] In the high - shear - force mode, without increasing the input of the motor, by controlling the double rotors to rotate reversely, the relative speed between the double rotors can be doubled, thus increasing the shear force and improving the homogenization effect.

[0057] C: Low - shear - force mode: The first homogenization motor 3 and the second homogenization motor 4 respectively control the first rotor 1 and the second rotor 2 to rotate in the same direction at different speeds.

[0058] In the low - shear - force mode, the homogenization effect of traditional homogenization equipment is achieved.

[0059] At the same time, in the shear - free mode, high - shear - force mode or low - shear - force mode, when the first homogenization motor 3 and the second homogenization motor 4 control the first rotor 1 and the second rotor 2 to maintain a constant relative speed, the outputs of the first homogenization motor 3 and the second homogenization motor 4 are adjusted simultaneously to reduce or increase the homogenization speed of the homogenization equipment.

[0060] When applied to the scenario of continuous production, when the demand for upstream materials in the subsequent production line changes, by ensuring the constancy of the relative speed between the first rotor 1 and the second rotor 2, and at the same time increasing or decreasing the output of the homogenization motor, the output of the homogenization equipment is adjusted to match the demand for the homogenized materials in the subsequent production line. Thus, there is no need to use an additional storage tank to store the homogenized materials and wait for the subsequent production line to use them, and the risk of material contamination caused by the material storage and retrieval links is also avoided. Finally, on the premise of ensuring the consistency of the homogenized materials, it can be directly connected to the continuous production link, improving the efficiency of continuous production.

Claims

1. A double-rotor homogenizing device, characterized in that: The invention comprises two concentrically arranged first rotors and second rotors, wherein the first rotors and the second rotors are respectively connected to the first homogenizing motor and the second homogenizing motor through the shafts, and a pressing impeller for pressing the material and a crushing impeller for crushing the material are arranged on the shaft of the first rotor along the direction of the first rotor toward the motor, and the second rotor is arranged on the outside of the first rotor, and a discharge impeller for discharging the material which is concentric with the second rotor and / or the first rotor is also arranged on the outside of the second rotor.

2. A dual-rotor homogenizing device according to claim 1, characterized in that: It also includes a shell, which encloses the first rotor, the second rotor, the pressing impeller, the crushing impeller and the discharging impeller. The shaft extends out of the shell, and a mechanical seal is arranged between the shaft and the shell.

3. A dual-rotor homogenizing device according to claim 2, characterized in that: The shell includes a first shell and a second shell, the first shell and the second shell are sealed and connected via a flange, the first shell is located between the first rotor and the first homogenizing motor, and the second shell is located between the second rotor and the second homogenizing motor.

4. A dual-rotor homogenizing device according to claim 3, characterized in that: The top of the first shell is provided with a material port connected to the tank body, the bottom is provided with a first discharge port, and the side is provided with a feed port connected to the entry of materials that do not require pretreatment.

5. A dual-rotor homogenizing device according to claim 3, characterized in that: The top of the second shell is provided with a circulation port connected to a circulation pipeline, and the bottom is provided with a second discharge port.

6. A dual-rotor homogenizing device according to claim 1, characterized in that: A plurality of mutually parallel first bevels are evenly arranged on the radial outer wall of the first rotor, and a plurality of mutually parallel second bevels are evenly arranged on the radial outer wall of the second rotor. The first bevels and the second bevels are staggered when the first rotor and the second rotor are rotatably installed on the homogenizing device.

7. A dual-rotor homogenizing device according to claim 1, characterized in that: The crushing impeller and the pressing impeller are both arc-shaped blades, the leading edge and the trailing edge of the crushing impeller are both provided with cutting edges, and the axial length of the pressing impeller is longer than that of the crushing impeller.

8. A dual-rotor homogenizing device according to claim 1, characterized in that: The discharge impeller includes teeth, a ring and a connecting rod. The ring is connected to the shaft connected to the first rotor through the connecting rod. A plurality of teeth are evenly distributed on the end surface of the ring facing the second rotor. The length of the teeth is consistent with the axial length of the second rotor so that the discharge impeller wraps the axial end surface of the second rotor.

9. A control method for a dual-rotor homogenizing device, characterized in that: There are three control modes: A: No shear force mode: The first homogenizing motor and the second homogenizing motor respectively control the first rotor and the second rotor to rotate in the same direction and at the same speed; B: High shear force mode: the first homogenizing motor and the second homogenizing motor control the first rotor and the second rotor to rotate in opposite directions respectively; C: Low shear force mode: the first homogenizing motor and the second homogenizing motor respectively control the first rotor and the second rotor to rotate in the same direction but at different speeds.

10. The control method of a dual-rotor homogenizing device according to claim 1, characterized in that: In the no-shear mode, high-shear mode or low-shear mode, the first homogenizing motor and the second homogenizing motor simultaneously adjust the output of the first homogenizing motor and the second homogenizing motor while controlling the first rotor and the second rotor to maintain a constant relative speed, thereby reducing or increasing the homogenizing speed of the homogenizing equipment.

Images