CN113813865A - Stirring device capable of being automatically adjusted - Google Patents
Stirring device capable of being automatically adjusted Download PDFInfo
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- CN113813865A CN113813865A CN202111230075.5A CN202111230075A CN113813865A CN 113813865 A CN113813865 A CN 113813865A CN 202111230075 A CN202111230075 A CN 202111230075A CN 113813865 A CN113813865 A CN 113813865A
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- stirring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
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- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention discloses an automatically adjustable stirring device, which relates to the field of stirring and comprises a stirring type reactor, a sensing system, a numerical control system and an adjustable stirring system; the sensing system senses the position and the flow velocity of the liquid level, the numerical control system realizes signal processing and adjusts the adjustable stirring system; the adjustable stirring system comprises a stirring shaft, a screw bearing, a transmission rod, an adjustable stirring paddle, a fixed stirring paddle, a stirring motor, a screw motor and a transmission motor; the stirring shaft is hollow and provided with a groove, a screw bearing is connected inside the stirring shaft, the transmission rod is arranged in the screw, the adjustable stirring paddle comprises an adjustable stirring paddle shaft and an adjustable stirring paddle blade, the adjustable stirring paddle shaft is fixed on the screw, the fixed stirring paddle is fixed at the bottom of the stirring shaft, and the stirring motor drives the adjustable stirring paddle and the fixed stirring paddle to rotate; the screw motor drives the adjustable stirring paddle to move; the drive rod controls the blade angle of the adjustable stirring paddle. The invention can realize the in-situ automatic adjustment of the height and the angle.
Description
Technical Field
The invention relates to the field of stirring, in particular to an automatically adjustable stirring device.
Background
The stirring system has important and wide application in chemical engineering and biological engineering. Through the stirring paddle, the stirring type reactor realizes the good mixing of reactants, thereby ensuring the reaction performance and stability. Conventional mixing devices include a set of fixed position paddles that provide both axial and radial forces. The stirring effect can be enhanced by increasing the size of the stirring paddle, but the energy consumption is increased at the same time. By adjusting the angle of the paddle, the direction of the force provided by the paddle can be adjusted. Therefore, optimizing the position of the stirring paddle and the angle of the paddle is an important condition for improving the production economic benefit. However, in a particular production process, the volume and rheological properties of the liquid may change over time. For example, when mixing a high viscosity pseudoplastic non-newtonian fluid, the viscosity of the liquid surrounding the paddles decreases with mixing but the viscosity of the liquid further from the paddles decreases to a lesser extent, requiring greater radial force to achieve better mixing performance. In addition, in the fed-batch reaction, the liquid level rises with time, and therefore it is necessary to increase the axial force of the stirring system or increase the paddle position. Therefore, the stirring performance can be improved by guiding the adjustment of the stirring system according to the flow field information in the reactor. The in-situ sensor can feed back the reaction state in real time and provide a basis for process control. The process control based on the sensor has better fluctuation resistance and accuracy degree than the process control based on the empirical technology, the production stability is increased, and the system error is reduced. Although the traditional flow rate meter can well reflect the mixing condition in the reactor, if only one flow rate sensor is arranged, the traditional flow rate meter can only reflect the global flow rate and cannot reflect the details of the flow field in the reactor. However, the volume or cost is generally large, and the mixing performance is not good when the reactor is placed in a reactor.
The existing stirring device can not adjust the rotating speed and position of the stirring paddle and the direction of the provided force in real time according to the flow field information in the reactor. Although the stirring paddles can be adjusted in the prior patents CN201520312791.1 and CN201420584801.2, the in-situ adjustment cannot be carried out under the condition that the reaction volume and the rheological property are changed. The lifting type telescopic combined stirring device disclosed in patent CN201510263105.0 can realize that a stirring paddle is guided to lift by using a liquid level sensor. However, due to the 8-shaped design, when the stirring paddle rises, the stirring radial area is reduced, the position of the stirring paddle cannot be changed under the condition of not changing the shape of the stirring paddle, and the radial liquid mixing is not facilitated; furthermore, because the paddle of the stirring paddle is directly contacted with the fermentation tank, unnecessary friction is generated during stirring, the energy consumption is increased, and the economic benefit is reduced; because the height change of the reactor is designed based on a liquid level sensor, the sensor cannot well reflect the fluid performance in the reactor; the stirring paddle can provide limited axial stirring power and can influence axial mixing.
Therefore, a stirring system which can be adjusted in real time according to flow field information is developed, and stirring performance and production stability of the reactor can be improved.
Accordingly, those skilled in the art have endeavored to develop an automatically adjustable stirring device.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the technical problems to be solved by the present invention are the monitoring problem of the flow field in the reactor and the adjustment problem of the stirring paddle, and the present invention aims to design a system capable of changing the position of the stirring paddle according to the flow field information.
In order to achieve the aim, the invention provides an automatically adjustable stirring device, which comprises a stirring type reactor, a sensing system, a numerical control system and an adjustable stirring system, wherein the stirring type reactor is provided with a stirring shaft;
a stirring type reactor baffle is arranged on the side wall of the stirring type reactor;
the sensing system comprises a pressure sensor and a control system, wherein the pressure sensor is used for sensing the position and the flow rate of the liquid level in the adjustable stirring system;
the numerical control system comprises a processor, an operation panel and a control circuit, processes the liquid level position and the flow velocity signal acquired by the sensing system, and adjusts the adjustable stirring system according to the processing result;
the adjustable stirring system comprises a stirring shaft, a screw bearing, a transmission rod, an adjustable stirring paddle, a fixed stirring paddle, a stirring motor, a screw motor and a transmission motor; the stirring shaft is hollow inside, a groove is formed in the stirring shaft, an adjustable stirring paddle guide rail is formed, and the adjustable stirring paddle guide rail provides a sliding track for the adjustable stirring paddle; the screw bearing is connected inside the stirring shaft; the transmission rod is arranged in the screw rod and is fixed through a transmission rod bearing; the adjustable stirring paddle comprises an adjustable stirring paddle shaft and an adjustable stirring paddle blade, and the adjustable stirring paddle shaft is fixed on the screw; the fixed stirring paddle is fixed at the bottom of the stirring shaft; the stirring motor is connected with the stirring shaft through a first bevel gear set to drive the adjustable stirring paddle and the fixed stirring paddle to rotate; the screw rod motor is connected with the screw rod and drives the adjustable stirring paddle to move up and down along the adjustable stirring paddle guide rail; the transmission motor drives the transmission rod to rotate; the transmission rod is connected with the adjustable stirring paddle blade to control the angle of the adjustable stirring paddle blade.
Further, the pressure sensor is mounted on the baffle of the stirring type reactor, and the liquid level position and the flow rate in the stirring type reactor are represented by sensing the pressure value in the liquid.
Further, the screw does not rotate with the rotation of the stirring shaft.
Furthermore, the lifting of the screw rod drives the transmission rod to lift, and the rotation of the transmission rod does not influence the rotation of the screw rod.
Further, the adjustable stirring paddle shaft is mounted on the screw through a first long screw and a screw bearing, and the diameter of the first long screw is smaller than the width of the adjustable stirring paddle guide rail.
Furthermore, the adjustable stirring paddle blade is fixed with a second long screw of the adjustable stirring paddle shaft through penetrating through the adjustable stirring paddle guide rail, and the second long screw is connected with the transmission rod through a second bevel gear set.
Further, one conical gear of the second conical gear set is fixed at the bottom of the transmission rod, and the other conical gear of the second conical gear set is fixed at the tail end of the second long screw.
Furthermore, the bottom of the screw rod is provided with a one-way ratchet wheel, the one-way ratchet wheel is connected with the second conical gear set, and the counterclockwise rotation of the transmission rod drives the rotation of the second conical gear set, so that the angle of the adjustable stirring paddle blade is adjusted.
Further, the numerical control system adopts the following control method: when the liquid level position rises or falls, the lifting of the adjustable stirring paddle is adjusted by controlling the rotating speed of the screw rod motor; when the flow rate is insufficient or too high, the rotating speed of the adjustable stirring paddle is adjusted by controlling the rotating speed of the stirring motor; when the radial/axial flow rate is insufficient, the angle of the adjustable stirring paddle blade is adjusted by controlling the rotating speed of the transmission motor, so that the radial force and the axial force of the adjustable stirring paddle are adjusted.
Further, the adjustable stirring system further comprises a transmission motor guide rail for supporting the transmission motor to move.
In the preferred embodiment of the invention, compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a set of sensor system for representing a flow field in a reactor, which can sense the height and the speed of the liquid level in the flow field in real time and realize the real-time monitoring of the flow field in the reactor;
2. the invention provides a stirring paddle system capable of adjusting height and angle, which is characterized in that a motor for adjusting the stirring paddle is controlled in real time by a numerical control system in combination with a real-time signal of a sensor, so that in-situ adjustment is realized;
3. the numerical control system provided by the invention can control the rotating speed of the stirring motor according to the feedback of the sensing system, so that the rotating speed and the energy consumption of the stirring paddle are adjusted.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic view of a paddle system of the present invention;
FIG. 2 is an overall schematic view of the present invention;
FIG. 3 is a schematic view of an adjustable paddle according to the present invention;
FIG. 4 is a schematic view of the angle change of the adjustable paddle blade of the present invention.
Wherein: 1-stirring type reactor baffle, 2-stirring paddle system, 3-pressure sensor, 4-numerical control system, 5-transmission rod, 6-screw rod, 7-first conical gear set, 8-stirring shaft, 9-adjustable stirring paddle guide rail, 10-transmission motor guide rail, 11-transmission motor, 12-screw rod motor, 13-stirring motor, 14-adjustable stirring paddle, 15-fixed stirring paddle, 16-transmission rod bearing, 17-adjustable stirring paddle shaft, 18-screw rod bearing, 19-first long screw, 20-adjustable stirring paddle blade, 21-second long screw, 22-second conical gear set and 23-one-way ratchet wheel.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
In the preferred embodiment of the present invention, as shown in fig. 2, the stirring system comprises a stirred reactor, a stirring paddle system 2 and a sensing system. The side wall of the stirring type reactor is provided with a stirring type reactor baffle plate 1, the sensing system comprises one or more groups of pressure sensors 3 arranged on the stirring type reactor baffle plate 1, and the pressure sensors 3 can collect the pressure of the position in the liquid in real time, so that the liquid level and the flow rate of the fluid in the reactor can be represented. The numerical control system 4 comprises a processor, an operation panel and a control circuit, the numerical control system 4 is connected with the sensing system and the stirring paddle system 2, receives and processes liquid level and flow velocity signals collected by the sensing system, and adjusts the rotating speed of a corresponding motor in the stirring paddle system 2 according to a processing result to realize adjustment of the stirring paddle system 2.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, in the preferred embodiment of the present invention, the stirring paddle system 2 includes a stirring shaft 8, a stirring motor 13, a transmission motor 11, a screw motor 12, a transmission rod 5, a screw 6, a first bevel gear set 7, an adjustable stirring paddle guide rail 9, a transmission motor guide rail 10, an adjustable stirring paddle 14 and a fixed stirring paddle 15. The stirring shaft 8 is designed to be hollow, and is grooved on the outer surface to form an adjustable stirring paddle guide rail 9 for providing a sliding track for an adjustable stirring paddle 14. The screw 6 is sleeved and connected inside the stirring shaft 8, and the transmission rod 5 is arranged in the screw 6 and fixed through a transmission rod bearing 16; the adjustable stirring paddle 14 comprises an adjustable stirring paddle shaft 17 and an adjustable stirring paddle blade 20, and the adjustable stirring paddle shaft 17 is fixed on the screw 6; the fixed stirring paddle 15 is fixed at the bottom of the stirring shaft 8; the stirring motor 13 is connected with the stirring shaft 8 through the first bevel gear group 7, and the rotation of the stirring motor 13 drives the adjustable stirring paddle 14 and the fixed stirring paddle 15 to rotate, so that the object to be stirred is fully stirred; the screw rod motor 12 is connected with the screw rod 6, and the adjustable stirring paddle 14 can be driven by the screw rod 6 to move up and down along the adjustable stirring paddle guide rail 9 along with the rotation of the screw rod motor 12, so that the height of the adjustable stirring paddle 14 is controlled; the adjustable stirring paddle shaft 17 is installed on the screw 6 through a first long screw 19 and a screw bearing 18, the diameter of the first long screw 19 is slightly smaller than the width of the adjustable stirring paddle guide rail 9, the adjustable stirring paddle blade 20 is fixed with a second long screw 21 of the adjustable stirring paddle shaft 17 through penetrating through the adjustable stirring paddle guide rail 9, the second long screw 21 is connected with the transmission rod 5 through a second bevel gear set 22, one bevel gear of the second bevel gear set 22 is fixed at the bottom of the transmission rod 5, and the other bevel gear of the second bevel gear set 22 is fixed at the tail end of the second long screw 21. The bottom of the screw rod 6 is provided with a one-way ratchet wheel 23, the one-way ratchet wheel 23 is connected with the second conical gear set 22, and the counterclockwise rotation of the transmission rod 5 drives the second conical gear set 22 to rotate, so that the angle of the adjustable stirring paddle blade 20 is adjusted.
In the preferred embodiment of the present invention, a driving motor 11 and a driving motor rail 10 are further provided to support the movement of the driving motor 11. When the transmission motor 11 rotates, the transmission rod 5 is driven to rotate.
In the preferred embodiment of the present invention, the screw 6 does not rotate with the rotation of the stirring shaft 8, the lifting of the screw 6 drives the lifting of the transmission rod 5, and the rotation of the transmission rod 5 does not affect the rotation of the screw 6.
In the preferred embodiment of the present invention, the numerical control system 4 adopts the following control method:
when the liquid level position rises or falls, the lifting of the adjustable stirring paddle 14 is adjusted by controlling the rotating speed of the screw rod motor 12, so that the height of the adjustable stirring paddle 14 is controlled; when the flow rate is insufficient or too high, the rotating speeds of the adjustable stirring paddle 14 and the fixed stirring paddle 15 are adjusted by controlling the rotating speed of the stirring motor 13, so that the stirring force is controlled; when the radial/axial flow rate is insufficient, the angle of the adjustable stirring paddle blade 20 is adjusted by controlling the rotating speed of the transmission motor 11, so that the distribution of the radial and axial forces of the adjustable stirring paddle 14 is optimized.
This example provides a case of using in-situ adjustable to increase the agitation efficiency of fed high viscosity pseudoplastic fluids (e.g., fed filamentous fungal fermentation processes). In the process, the liquid level can be gradually increased, and the viscosity of the fermentation liquor can be gradually increased; and because of its pseudoplastic rheological properties, the flow rate away from the paddle area will gradually diminish, which is detrimental to mixing. When the viscosity of the fermentation liquor rises, the signal of the pressure sensor 3 passes through the numerical control system 4, and the rotating speed of the stirring motor 13 is increased so as to increase the rotating speed of the first conical gear set 7, so that the rotation of the stirring shaft 8 is increased, and the adjustable stirring paddle 14 and the fixed stirring paddle 15 are driven to rotate; when the rotating speed of the stirring shaft 8 reaches the set upper limit and the flow rate of the fluid reflected by the pressure sensor 3 is too low, the numerical control system 4 controls the transmission motor 11 to rotate so as to control the rotation of the transmission rod 5, and the transmission rod 5 drives the one-way ratchet wheel 23 to control the rotation of the second conical gear set 22 so as to adjust the angle of the adjustable stirring paddle blade 20 (as shown in fig. 4), so that the direction of the force provided by the stirring paddle is changed; when the pressure sensor 3 reflects that the liquid level rises or the axial flow rate is insufficient, the numerical control system 4 controls the screw rod motor 12 to work, the axial position of the screw rod 6 is changed through the screw rod motor 12, the screw rod 6 drives the adjustable stirring paddle 14 to be high or low, the first long screw 19 and the second long screw 21 move in the guide rail 9 to stabilize the stirring paddle 14, meanwhile, the screw rod 6 drives the transmission rod 5 and the transmission motor 11 to move, and the guide rail 10 provides support for the transmission motor 11.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. An automatically adjustable stirring device is characterized by comprising a stirring type reactor, a sensing system, a numerical control system and an adjustable stirring system;
a stirring type reactor baffle is arranged on the side wall of the stirring type reactor;
the sensing system comprises a pressure sensor and a control system, wherein the pressure sensor is used for sensing the position and the flow rate of the liquid level in the adjustable stirring system;
the numerical control system comprises a processor, an operation panel and a control circuit, processes the liquid level position and the flow velocity signal acquired by the sensing system, and adjusts the adjustable stirring system according to the processing result;
the adjustable stirring system comprises a stirring shaft, a screw bearing, a transmission rod, an adjustable stirring paddle, a fixed stirring paddle, a stirring motor, a screw motor and a transmission motor; the stirring shaft is hollow inside, a groove is formed in the stirring shaft, an adjustable stirring paddle guide rail is formed, and the adjustable stirring paddle guide rail provides a sliding track for the adjustable stirring paddle; the screw bearing is connected inside the stirring shaft; the transmission rod is arranged in the screw rod and is fixed through a transmission rod bearing; the adjustable stirring paddle comprises an adjustable stirring paddle shaft and an adjustable stirring paddle blade, and the adjustable stirring paddle shaft is fixed on the screw; the fixed stirring paddle is fixed at the bottom of the stirring shaft; the stirring motor is connected with the stirring shaft through a first bevel gear set to drive the adjustable stirring paddle and the fixed stirring paddle to rotate; the screw rod motor is connected with the screw rod and drives the adjustable stirring paddle to move up and down along the adjustable stirring paddle guide rail; the transmission motor drives the transmission rod to rotate; the transmission rod is connected with the adjustable stirring paddle blade to control the angle of the adjustable stirring paddle blade.
2. The automatically adjustable stirring device of claim 1, wherein said pressure sensor is mounted on said baffle of said stirred reactor to sense a pressure value in a liquid to thereby characterize said liquid level and said flow rate in said stirred reactor.
3. The automatically adjustable stirring device of claim 1, wherein said screw does not rotate with rotation of said stirring shaft.
4. The automatically adjustable mixing device according to claim 1, wherein the screw is lifted to lift the driving rod, and the rotation of the driving rod does not affect the rotation of the screw.
5. The automatically adjustable mixing device according to claim 1, wherein said adjustable paddle shaft is mounted on said screw by means of a first long screw and a screw bearing, said first long screw having a diameter smaller than the width of said adjustable paddle guide.
6. The automatically adjustable mixing device according to claim 1, wherein the adjustable mixing paddle blade is secured to the adjustable mixing paddle shaft by a second long screw passing through the adjustable mixing paddle guide rail, the second long screw being connected to the drive rod by a second bevel gear set.
7. The automatically adjustable stirring device of claim 6, wherein one of the conical gears of the second conical gear set is fixed to the bottom of the driving rod, and the other conical gear of the second conical gear set is fixed to the tail end of the second long screw.
8. The automatically adjustable stirring device as claimed in claim 1, wherein a one-way ratchet wheel is disposed at the bottom of the screw rod, the one-way ratchet wheel is connected to the second conical gear set, and the drive rod rotates counterclockwise to drive the second conical gear set to rotate, so as to adjust the angle of the adjustable stirring paddle blade.
9. The automatically adjustable mixing device according to claim 1, wherein said numerical control system employs the following control method: when the liquid level position rises or falls, the lifting of the adjustable stirring paddle is adjusted by controlling the rotating speed of the screw rod motor; when the flow rate is insufficient or too high, the rotating speed of the adjustable stirring paddle is adjusted by controlling the rotating speed of the stirring motor; when the radial/axial flow rate is insufficient, the angle of the adjustable stirring paddle blade is adjusted by controlling the rotating speed of the transmission motor, so that the radial force and the axial force of the adjustable stirring paddle are adjusted.
10. The automatically adjustable mixing device of claim 1, wherein said adjustable mixing system further comprises a drive motor guide that supports movement of said drive motor.
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| CN202111230075.5A CN113813865B (en) | 2021-10-19 | 2021-10-19 | Stirring device capable of being automatically adjusted |
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| CN202111230075.5A CN113813865B (en) | 2021-10-19 | 2021-10-19 | Stirring device capable of being automatically adjusted |
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| CN113813865A true CN113813865A (en) | 2021-12-21 |
| CN113813865B CN113813865B (en) | 2022-06-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114522602A (en) * | 2022-03-14 | 2022-05-24 | 江苏康爱特环境工程集团有限公司 | Paint produce is with filter equipment who has non-qualified coating recovery remixing function |
| CN115282916A (en) * | 2022-10-10 | 2022-11-04 | 江苏旭阳化工设备有限公司 | Chemical industry reation kettle of high leakproofness |
| CN115682704A (en) * | 2022-09-27 | 2023-02-03 | 华能南京金陵发电有限公司 | Anti-blocking drainage device |
| CN117899689A (en) * | 2024-03-20 | 2024-04-19 | 潍坊杰高非织材料科技有限公司 | Slurry mixing device |
| CN117899689B (en) * | 2024-03-20 | 2024-06-04 | 潍坊杰高非织材料科技有限公司 | Slurry mixing device |
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| CN114522602B (en) * | 2022-03-14 | 2023-01-10 | 江苏康爱特环境工程集团有限公司 | Coating production is with filter equipment who has non-qualified coating recovery remixing function |
| CN115682704A (en) * | 2022-09-27 | 2023-02-03 | 华能南京金陵发电有限公司 | Anti-blocking drainage device |
| CN115282916A (en) * | 2022-10-10 | 2022-11-04 | 江苏旭阳化工设备有限公司 | Chemical industry reation kettle of high leakproofness |
| CN117899689A (en) * | 2024-03-20 | 2024-04-19 | 潍坊杰高非织材料科技有限公司 | Slurry mixing device |
| CN117899689B (en) * | 2024-03-20 | 2024-06-04 | 潍坊杰高非织材料科技有限公司 | Slurry mixing device |
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| CN113813865B (en) | 2022-06-24 |
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