CN216538991U

CN216538991U - Centrifugal purification system

Info

Publication number: CN216538991U
Application number: CN202220113948.8U
Authority: CN
Inventors: 不公告发明人
Original assignee: Quantaeye Beijing Technology Co ltd
Current assignee: Quantaeye Beijing Technology Co ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-05-17
Anticipated expiration: 2032-01-17

Abstract

The present application provides a centrifugal purification system. The centrifugal purification system comprises: a rotating disk module including an opening and a discharge slot; the driving module is used for controlling the rotating state of the rotating disk module; a valve module for controlling opening and closing of the discharge groove; the quantum dot collection module is used for collecting the purified liquid quantum dots from the opening; a waste liquid collecting module for collecting waste liquid centrifugally thrown out of the discharge tank in an open state of the discharge tank; and a control system for controlling the centrifugal purification system to achieve automated purification of the quantum dots. This application has realized the discharge control of waste liquid through discharge tank and valve module, collects the quantum dot after the purification through the opening, and cooperation control system can realize the automation and the accuracy of quantum dot purification process.

Description

Centrifugal purification system

Technical Field

The application relates to the field of centrifugal purification, in particular to a centrifugal purification system for quantum dot purification.

Background

The traditional method for purifying the quantum dots is a manual method, wherein an operator places a quantum dot stock solution into a centrifugal tube, adds a precipitator, and centrifuges the quantum dot stock solution by using a centrifuge to form quantum dot precipitate and waste liquid. And after the waste liquid is poured out, redissolving the quantum dot precipitate by using a good solvent, and collecting the redissolution, thereby obtaining the quantum dot solution with higher purity.

The volume of the quantum dot stock solution and the good solvent, the rotating speed of a centrifuge and the centrifuging time length are required to be accurate, otherwise, the consistency of the purified quantum dots may be problematic. Moreover, the whole process of quantum dot purification requires the patience operation of operators, and the process is complicated. Operators are exposed in the organic solvent environment, and potential safety hazards exist. Based on the consideration of the consistency and the work safety of the quantum dots in the quantum dot purification technology, the realization of the automation and the accuracy of the work is very important.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a centrifugal purification system for quantum dot purification.

The centrifugal purification system comprises:

a rotating disk module including an opening and a discharge slot;

the driving module is used for controlling the rotating state of the rotating disk module;

a valve module for controlling opening and closing of the discharge groove;

the quantum dot collection module is used for collecting the purified liquid quantum dots from the opening;

a waste liquid collecting module for collecting waste liquid centrifugally thrown out of the discharge tank in an open state of the discharge tank; and

a control system for controlling the centrifugal purification system to achieve automated purification of quantum dots.

In at least one embodiment, the rotating disk module comprises:

a rotary disk body including a body peripheral wall and a body bottom wall, the discharge slot being located on a top surface of the body peripheral wall;

the rotary disc cover plate is provided with a corresponding groove corresponding to the shape of the discharge groove, the rotary disc cover plate covers the rotary disc body, the corresponding groove corresponds to the discharge groove in position, and the opening is located in the center of the rotary disc cover plate; and

a shim disposed between the rotary disk body and the rotary disk cover plate.

In at least one embodiment, the body bottom wall has a tapered surface that is concave toward the center.

In at least one embodiment, the valve module is a diaphragm valve module comprising:

the diaphragm valve seat is provided with a plunger hole;

a diaphragm spool disposed in the corresponding groove of the rotating disk cover plate and abutting against a face of the gasket facing the rotating disk cover plate; and

a plunger extending into said plunger bore and controllably movable relative to said diaphragm valve seat to pressurize said diaphragm valve spool and lower said diaphragm valve spool to compress said gasket to seal off said discharge slot; or releasing the pressure applied to the diaphragm valve post to open the discharge groove.

In at least one embodiment, the plunger is provided with threads, the plunger is in threaded connection with the plunger hole through the threads arranged on the plunger, the rotation position of the rotating disk module comprises a zero position,

the centrifugal purification system further comprises a diaphragm valve control module capable of controlling rotation of the plunger in a state where the rotating disk module is in the zero position.

In at least one embodiment, the driving module includes:

an output shaft of the centrifugal motor is connected to the rotating disk module so that the centrifugal motor can control the rotating state of the rotating disk module;

a sensor for detecting the zero position; and

and the electromagnetic brake is used for braking the output shaft of the centrifugal motor.

In at least one embodiment, the plunger is a control thumb bolt,

the diaphragm valve control module includes:

the adapter plate can reciprocate along the vertical direction under the guidance of the linear sliding table;

the adjusting motor is connected to the adapter plate;

the adjusting motor comprises a coupling for adjusting the motor and an adjusting butterfly bolt, the adjusting butterfly bolt comprises a butterfly head part and a connecting end, the connecting end is connected to an output shaft of the adjusting motor through the coupling for adjusting the motor,

and under the state that the rotary disc module is positioned at the zero position, the butterfly head of the butterfly bolt for adjustment can be controlled to be abutted against the butterfly head of the butterfly bolt for control through the linear sliding table and the adjusting motor, so that the rotation state of the butterfly bolt for control is controlled.

In at least one embodiment, the quantum dot collection module comprises:

a peristaltic pump comprising a suction end and a collection end;

a needle, a first connecting tube, the needle being connected to the suction end of the peristaltic pump through the first connecting tube, the needle being disposed at the opening of the rotary disk cover plate, the needle being abuttable against the body bottom wall of the rotary disk body, and the needle being disposed with a degree of freedom in a vertical direction; and

the quantum dot collecting container is connected to the collecting end of the peristaltic pump through the second connecting pipe.

In at least one embodiment, the waste collection module comprises:

a collector having a collector opening disposed about the rotating disk module, the collector opening facing the rotating disk module, the collector opening for receiving waste liquid centrifugally thrown off by the rotating disk module,

a waste liquid collection container in communication with the collector.

In at least one embodiment, the collector comprises a collector inner side wall, a collector outer side wall and a collector bottom wall,

the highest point of the collector outer sidewall is higher than the highest point of the collector inner sidewall, and/or an upper portion of the collector outer sidewall has a slope extending inward in a radial direction of the rotating disk module.

This application has realized the outflow control of waste liquid through discharge tank and valve module, collects the quantum dot after the purification through the opening, and cooperation control system can realize the automation and the accuracy of quantum dot purification process.

Drawings

Fig. 1 shows a schematic view of the overall structure of a centrifugal purification system according to an embodiment of the present application.

Fig. 2 shows a schematic structural diagram of a drive module of a centrifugal purification system according to an embodiment of the present application.

Fig. 3 shows a schematic structural diagram of a rotating disk module and a diaphragm valve module of a centrifugal purification system according to an embodiment of the present application.

Fig. 4A shows a schematic structural diagram of a rotating disk body of a centrifugal purification system according to an embodiment of the present application.

Fig. 4B shows a cross-sectional view of a spinning disk body of a centrifugal purification system according to an embodiment of the present application.

Fig. 5 shows an overall structural schematic diagram of a membrane valve control module and a quantum dot collection module of a centrifugal purification system according to an embodiment of the present application.

Fig. 6 shows a schematic diagram of a diaphragm valve control module of a centrifugal purification system according to an embodiment of the present application.

Fig. 7 shows a schematic structural diagram of a waste liquid collection module of a centrifugal purification system according to an embodiment of the present application.

Description of the reference numerals

1, a driving module; 11 a centrifugal motor; 12 a first coupling; 13 an extension shaft; 14 an electromagnetic brake; 15 a second coupling; 16 photogates;

2 a rotating disk module; 21 rotating the disc base; 22 rotating the disc body; 221 a body peripheral wall; 222 a bottom wall of the body; 223 a body connection hole; 224 a discharge chute; 23 rotating the disc cover plate; 231 an opening; 232 cover plate connecting holes; 233 corresponding to the groove; 24 a gasket;

3 a diaphragm valve module; 31 a diaphragm valve seat; 32 butterfly bolts for control; 33 diaphragm valve post;

4a diaphragm valve control module; 41 linear sliding table; 42 a regulating motor; 43 adjusting a coupling for the motor; 44 butterfly bolts for adjustment; 45 an adapter plate;

5 quantum dot collection module; a 51 peristaltic pump; a 52 needle;

6, a waste liquid collecting module; 61 a collector; 611 collector inner side walls; 612 an outer collector sidewall; 62 a funnel; 63 a waste liquid collection container;

7 power supply.

Detailed Description

Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that the detailed description is only intended to teach one skilled in the art how to practice the present application, and is not intended to be exhaustive or to limit the scope of the application.

The present application provides a centrifugal purification system. As shown in fig. 1, the system may include a drive module 1, a rotating disk module 2, a valve module (diaphragm valve module 3), a diaphragm valve control module 4, a quantum dot collection module 5, a waste liquid collection module 6, a power supply 7, and a control system. The centrifugal purification system can realize the functions of precipitation, redissolution and collection of the quantum dots and collection of waste liquid, so that the purification process of the quantum dots can be automated and accurate.

The modules of the centrifugal purification system of the present application are described in turn with reference to the accompanying drawings.

(drive module 1)

As shown in fig. 2, the driving module 1 may include a centrifugal motor 11, a first coupling 12, an extension shaft 13, an electromagnetic brake 14, a second coupling 15, and a photo gate 16.

In one embodiment of the present application, the centrifugal motor 11 may be a dc brushless motor having a maximum rotational speed of 4500 rpm and a rated rotational speed of 4000 rpm. The centrifugal motor 11 realizes accurate control of the rotating speed and acceleration of an output shaft thereof through a servo controller (not shown in the figure), and realizes experimental operations such as switching and mixing of high and low rotating speeds. The servo controller may be connected to a control system (for example, a computer at a general control end), and the servo controller receives an instruction from the control system, controls the rotation state of the output shaft of the centrifugal motor 11, and feeds back the state of the centrifugal motor 11 to the control system in real time. Wherein, the power supply 7 can supply power for the driving module 1.

The extension shaft 13 is connected to an output shaft of the centrifugal motor 11 through a first coupling 12, and the rotary disk module 2 (described later) is connected to the extension shaft 13 through a second coupling 15 so that the centrifugal motor 11 can rotate the rotary disk module 2.

A photogate 16 is mounted on the frame around the first coupling 12. A corresponding light barrier (not shown) may be disposed on the first coupling 12 and configured to pass through the light gate 16 when the first coupling 12 is rotated. The light barrier is located at the center of the photoelectric door 16 and can be used as a zero position of the first coupling 12. The photoelectric gate 16 is then able to detect the zero position of the rotating disk module 2. For example, when the control butterfly bolts 32 of the diaphragm valve module 3 are aligned with the adjustment butterfly bolts 44 of the diaphragm valve control module 4, the rotary disk module 2 is located at a zero position (the positional relationship between the butterfly bolts 32 and the rotary disk module 2 will be described later). A plurality of light-operated gates 16 may also be arranged, with which the rotational speed of the output shaft of the centrifugal motor 11 is measured. Of course, the detection of the zero position may also be implemented by other types of sensors, and the application is not limited to the type of sensor used to detect the zero position.

The electromagnetic brake 14 is sleeved on the extension shaft 13 and fixed on the surrounding frame, and the electromagnetic brake 14 can be a miniature power-off brake (a power-off brake type electromagnetic brake). The electromagnetic brake 14 is electrified, the output shaft of the centrifugal motor 11 can rotate, and the rotating disk module 2 can rotate; when it is desired to stop rotation of the rotary disk module 2, the electromagnetic brake 14 is de-energized, causing the output shaft and extension shaft 13 to stop rotating, preventing further rotation of the rotary disk module 2. The centrifugal motor 11 and the electromagnetic brake 14 can share the power supply 7, the centrifugal motor 11 is powered off, and the electromagnetic brake 14 brakes simultaneously.

The application can also select an electrified braking type electromagnetic brake, and only supplies power to the electromagnetic brake when braking is needed, so that the heat generation of the electromagnetic brake can be reduced, and the system safety is higher. Of course, the electromagnetic brake 14 may also be electrically connected to the control system, and may be controlled by the control system in a unified manner.

In the embodiments provided herein, torque from the centrifugal motor 11 may be transferred to the rotating turret module 2 via a coupling and extension shaft 13. Optionally, the extension shaft 13 may be made of 6061 aluminum alloy, and further, in order to improve the transmission stability, a loosening washer may be added at a transmission connection position between the extension shaft 13, the centrifugal motor 11 and the rotating disk module 2, and/or a support housing, a bracket, and the like may be added.

(rotating disk module 2)

As shown in fig. 3, 4A, 4B, the turntable module 2 includes a turntable base 21, a turntable body 22, and a turntable cover plate 23.

The turntable base 21 may have a shaft structure (not shown) and the shaft structure of the turntable base 21 is connected to the extension shaft 13 through a second coupling 15. The turntable base 21 is in turn connected to the turntable body 22 so that the centrifugal motor 11 can rotate the turntable body 22.

The rotating disc body 22 is a container that accommodates various materials. The rotating disk body 22 includes a body peripheral wall 221 and a body bottom wall 222.

The body peripheral wall 221 has a body coupling hole 223 in the axial direction. A discharge groove 224 is also provided on the top surface of the body peripheral wall 221. Illustratively, the discharge slots 224 may be milled out with a spherical cutter having a diameter of 1.5 millimeters. After the rotating disk cover plate 23 is covered on the rotating disk body 22, the discharge grooves 224 may serve as liquid discharge channels, and when the rotating disk module 2 rotates, the liquid (mainly, waste liquid) in the rotating disk body 22 can be centrifugally thrown out through the discharge grooves 224. The width of the discharge groove 224 may be equal to or slightly larger than the diameter of the diaphragm valve post 33 (described later) so that the diaphragm valve post 33 and the gasket 24 can be inserted into the discharge groove 224.

The inner surface of the body bottom wall 222 may be flat or tapered. When the inner surface of the bottom wall 222 of the body is a conical surface depressed toward the center, the liquid in the rotating disc body 22 will converge toward the center of the bottom wall 222 of the body, so as to collect the liquid therein (mainly, the redissolved quantum dot solution). When the rotating disc body 22 rotates at a high speed (described later), the centrifugal force applied to the liquid is thousands of times larger than the gravity of the liquid, and the inclination angle of the conical surface has little influence on the centrifugal process of the liquid.

The rotating disk cover 23 is provided with cover connection holes 232 corresponding to the body connection holes 223 in position. The rotary disk cover plate 23 can be fixedly attached to the rotary disk body 22 by means of screws, body attachment holes 223, and cover plate attachment holes 232. Illustratively, there are 24 body attachment holes 223 and cover plate attachment holes 232.

The rotating disk cover plate 23 has a centrally located opening 231, and may be used to insert material into the rotating disk body 22 through the opening 231 and to collect purified quantum dots (described below). The rotary disk cover 23 is also provided with corresponding recesses 233 having the same shape as the discharge grooves 224, and when the rotary disk cover 23 is covered on the rotary disk main body 22, the discharge grooves 224 and the corresponding recesses 233 can be positioned correspondingly. Of course, the opening 231 may be located at other positions to facilitate the material to be put into the rotating disk body 22, and the position (described later) of the needle 52 in the quantum dot collecting module 5 may be adjusted accordingly.

A spacer 24 is also provided between the rotary disk body 22 and the rotary disk cover plate 23. Illustratively, the gasket 24 may be a fluorine gel gasket, which has good elasticity.

In use, to avoid spilling liquid within spinner body 22, the actual volume of liquid within spinner body 22 may not exceed 2/3 of the rated capacity of spinner body 22. For example, a rated capacity of the spinner body 22 of 300 milliliters, the actual volume of liquid added to the spinner body 22 would not exceed 200 milliliters.

Alternatively, to ensure resistance to complex solvent environments, the rotating disk material may be 304 stainless steel. It is also contemplated to replace less dense materials to improve the solvent resistance of the rotor by surface modification, painting, coating, etc.

(valve module)

The valve module is used to control the open and closed states of the discharge slots 224, and the application is not limited to a particular type of valve module. For example, the valve module may be a solenoid valve electrically connected to the control system to control the opening and closing of the discharge slot 224. Alternatively, the valve module may be a diaphragm valve module 3. As shown in fig. 3, the diaphragm valve module 3 includes a diaphragm valve seat 31, a plunger (control butterfly bolt 32), and a diaphragm valve post 33.

The diaphragm valve seat 31 may be fixed to the rotary disk module 2 through the cover connection hole 232 and the body connection hole 223. A plunger hole is provided in the diaphragm valve seat 31.

The plunger is provided with threads and can be screwed with the threads of the plunger hole.

The diaphragm valve posts 33 are disposed in corresponding recesses 233 of the rotating disk cover plate 23, and the diaphragm valve posts 33 may abut against a face (upper face) of the spacer 24 facing the rotating disk cover plate 23. It will be appreciated that the spacer 24 acts as a diaphragm in the diaphragm valve module 3.

The diaphragm valve seat 31 is mounted in a position corresponding to the corresponding recess 233 of the rotary disk module 2 so that the plunger can abut against the diaphragm valve spool 33 after the plunger is inserted into the plunger hole. Under the control of the diaphragm valve control module 4 (described later), the plunger can controllably move relative to the diaphragm valve seat 31 to press the diaphragm valve post 33, so that the diaphragm valve post 33 descends to press the gasket 24 to block the discharge groove 224; or the pressure applied to the diaphragm valve 33 is released to open the discharge groove 224.

In one embodiment of the present application, the plunger may be a control thumb bolt 32 that includes a thumb head and an abutment end. Of course, the plunger may be other types of bolts, and the shape of the bolt head is not limited by the present application.

The control butterfly bolt 32 is threadably engaged with the plunger hole, and an abutting end of the control butterfly bolt 32 is abutted against the diaphragm spool 33.

The butterfly bolt 32 for control is rotated (for example, clockwise), the diaphragm valve post 33 abutting against the butterfly bolt 32 for control presses the gasket 24 downward, the gasket 24 is locally deformed and closely attached to the discharge groove 224, a barrier effect is formed, and the liquid in the rotary disk body 22 is prevented from being centrifugally spun out of the discharge groove 224, that is, the closed state of the discharge groove 224 is realized.

The butterfly bolt 32 for control is rotated in the reverse direction (for example, in the counterclockwise direction), the downward pressure of the diaphragm valve 33 is removed, the gasket 24 is restored, the diaphragm valve 33 is lifted by the elastic force of the gasket 24, the discharge groove 224 is restored to be clear, and the fluid in the rotary disk body 22 can be centrifugally thrown out of the discharge groove 224, that is, the open state of the discharge groove 224 is realized.

The diaphragm valve module 3 provided by the present application can convert the rotation of the control butterfly bolt 32 into the lowering and raising of the diaphragm valve stem 33, and further control the opening and closing of the discharge groove 224, thereby realizing the opening and closing switching process of the discharge groove 224.

(diaphragm valve control module 4)

As shown in fig. 5 and 6, the diaphragm valve control module 4 includes a linear slide table 41, an adjustment motor 42, a coupling 43 for the adjustment motor, an adjustment butterfly bolt 44, and an adapter plate 45.

The present application does not limit the specific type of the linear slide table 41. For example, a screw rod type linear sliding table can be selected, and a screw rod is driven to rotate through a motor, so that a nut arranged on the screw rod performs linear reciprocating motion. The adapter plate 45 is connected to the nut, so that the adapter plate 45 can perform a linear reciprocating motion. Or, a synchronous belt type linear sliding table is selected and used, and the transmission shaft drives the synchronous belt to reciprocate. The slider is fixedly arranged on the synchronous belt, and the adapter plate 45 is connected to the slider, so that the adapter plate 45 can perform linear reciprocating motion. Springs may also be provided in the linear slide table 41 to cushion the movement of the transfer plate 45. The linear sliding table 41 can be electrically connected with a control system, and the motion state of the adapter plate 45 is controlled by the control system.

The adjustment motor 42 is connected to the adapter plate 45. The adjustment butterfly bolt 44 is connected to an output shaft of the adjustment motor 42 via the adjustment motor coupling 43. The adjustment motor 42 may be a step-down motor, enabling controlled rotational movement of the adjustment thumb screw 44. Also, the linear slide table 41 enables the adjustment butterfly bolt 44 to move in the vertical direction. The adjustment motor 42 may be electrically connected to a control system, by which the rotation state of its output shaft is controlled.

The diaphragm valve control module 4 is used to control the rotation of the plunger in the diaphragm valve module 3.

Illustratively, the rotary disk body 22 is caused to rotate and stop at the zero position by the position control of the drive module 1. The adjustment butterfly bolt 44 is controlled to move downward by the linear slide table 41, so that the butterfly head of the adjustment butterfly bolt 44 can abut against the butterfly head of the control butterfly bolt 32 of the diaphragm valve module 3 (for example, butterfly fin cross abutment). The opening and closing of the discharge groove 224 can be controlled by rotating the control thumb screw 32 of the diaphragm valve module 3 by rotating the adjustment thumb screw 44.

When the rotary disk body 22 needs to continue to rotate, the adjustment butterfly bolt 44 is controlled to move upwards by the linear sliding table 41, so that the interference between the adjustment butterfly bolt 44 and the diaphragm valve module 3 can be avoided.

The linear slide table 41 and the adjustment motor 42 can be controlled in a unified manner by a control system. Wherein, the power supply 7 can supply power for the linear sliding table 41 and the adjusting motor 42.

(Quantum dot collecting Module 5)

As shown in fig. 5, the quantum dot collection module 5 includes a peristaltic pump 51, a first connection tube (not shown), a needle 52, a second connection tube (not shown), and a quantum dot collection container (not shown).

Peristaltic pump 51 includes a suction end to which needle 52 may be connected by a first connecting tube and a collection end to which the quantum dot collection container is connected by a second connecting tube.

The needle 52 is fixed at the opening 231 of the rotary disk cover plate 23 without affecting the rotation of the rotary disk module 2. The connecting pipe can be a silicone tube, and the needle can be a dispensing needle. The collection end of peristaltic pump 51 may be connected to a quantum dot collection vessel.

When liquid (mainly liquid quantum dots after redissolution) in the rotating disc body 22 needs to be collected, the peristaltic pump 51 can be started, and the liquid in the rotating disc body 22 sequentially passes through the needle 52, the first connecting pipe, the suction end of the peristaltic pump 51, the collection end of the peristaltic pump and the second connecting pipe and enters the quantum dot collection container.

To collect as much liquid as possible in rotating disc body 22, needle 52 should be as small in diameter as possible, with needle 52 as close as possible to rotating disc bottom wall 222. If a gap is left between the needle 52 and the bottom wall 222 of the rotating disk, the partially reconstituted quantum dot liquid cannot be collected; if needle 52 abuts too tightly against rotary disk bottom wall 222, needle 52 and rotary disk bottom wall 222 will wear away from each other due to relative movement, and needle 52 with a smaller diameter may also be broken.

In one embodiment of the present application, the needle extends vertically into the opening 231 of the rotating disk cover plate 23 and is fixed in position with the rotating disk cover plate 23.

In another embodiment of the present application, the needle 52 may be connected to a spring (not shown in the drawings) fixed on the rotating disc cover plate 23, and the needle 52 is pressed downward by the spring, so that the needle 52 can be fully abutted against the bottom wall 222 of the rotating disc body 22, and the needle 52 has a degree of freedom in the vertical direction, thereby preventing the needle 52 from being too tightly abutted against the bottom wall 222 of the rotating disc and preventing the needle 52 from being too stressed. It will be appreciated that the spring rate may be selected based on the actual operating conditions to avoid overstressing needle 52.

Peristaltic pump 51 may be electrically connected to the control system and receive control instructions. The power supply 7 may power the peristaltic pump 51.

(waste liquid collecting Module 6)

As shown in fig. 7, waste collection module 6 may include a collector 61, a funnel 62, and a waste collection receptacle 63.

The collector 61 comprises a collector inner side wall 611, a collector outer side wall 612 and a collector bottom wall (not shown in the figure), which form a container with a collector opening. The collector opening is directed towards (radially inside) the rotating disc module 2 and is arranged around the rotating disc module 2. The height of the rotating disk module 2 is set such that: waste liquid thrown off the discharge chute 224 can pass from the collector opening into the collector 61.

The collector inner side wall 611 may be a rectangular side wall as shown in fig. 7, or a cylindrical side wall more closely fitted to the rotating disk module 2, preventing leakage.

The highest point of the collector outer side wall 612 may be higher than the highest point of the collector inner side wall 611 and/or a slope extending radially inward of the rotating disk module 2 and having a gradually increasing height may be provided at the top of the collector outer side wall 612, and the angle between the slope and the horizontal plane is, for example, 40 °, 45 °, 50 °. The specific angle is not limited, and the function of preventing waste liquid from splashing can be achieved.

The bottom wall of the collector can also be an inclined plane which forms a certain included angle with the horizontal plane, and the specific angle is not limited, so that the waste liquid is easier to collect. The lowest point of the outer sidewall 612 of the trap is provided with an opening for placing a funnel between the waste liquid collecting bottle and the trap, the opening is connected with the large end of the funnel 62, and the small end of the funnel 62 is communicated with the waste liquid collecting container 63.

Waste liquid is centrifugally thrown out through the discharge slot 224 between the collector inner sidewall 611 and the collector outer sidewall 612, through the inclined collector bottom wall into the funnel 62 and into the waste liquid collection receptacle 63.

The collector 61 may be formed by processing a galvanized sheet having good oxidation resistance. And antirust paint can be sprayed on the surface of the collector 61, so that the protection effect is enhanced. After the waste liquid is collected, the collector 61 can be cleaned by clean water or a mild (less corrosive) cleaning agent, so that the residual waste liquid is prevented from corroding equipment.

The material of the funnel 62 may be Polytetrafluoroethylene (PTFE), to some extent filtering out solid impurities. The hopper 62 may be attached to the bottom opening of the collector 61 by means of an AB glue.

A multi-way peristaltic pump can be added or a multi-way gate valve is adopted to be matched with a control system, so that the automatic addition of substances such as quantum dot stock solution, precipitator, good solvent, cleaning agent and the like is realized, and equipment for feeding is not described in detail in the application.

(working procedure)

Illustratively, the workflow of a centrifugal purification system may include the steps of:

1. the quantum dot stock solution is added into the rotating disk body 22 from the opening 231 of the rotating disk cover plate 23;

2. the precipitant is added into the rotary disk body 22 from the opening 231 of the rotary disk cover plate 23;

3. the rotating disc body 22 is controlled to be switched between 300 revolutions per minute and 900 revolutions per minute in a reciprocating mode, and the two liquids are mixed by utilizing Euler force;

4. the rotating disk body 22 is rotated at a high speed for a period of time, for example, the rotating speed of the rotating disk body 22 is controlled to be more than or equal to 4000 revolutions per minute, and the rotating time is controlled to be more than or equal to 5 minutes, so that the quantum dots are fully precipitated, and the quantum dot precipitation is mainly concentrated on the inner face of the body peripheral wall 221 of the rotating disk body 22;

5. stopping rotation of the rotating disk body 22, controlling the diaphragm valve module 3 through the diaphragm valve control module 4 to open (or not block) the discharge slot 224;

6. rotating the rotating disc body 22 at a low rotation speed for a period of time, for example, controlling the rotation speed of the rotating disc body 22 to be between 1000 rpm and 2000 rpm, centrifugally throwing the supernatant (waste liquid) out of the rotating disc body 22, dropping the supernatant (waste liquid) into the collector 61, filtering the supernatant (waste liquid) through the funnel 62, and collecting the supernatant (waste liquid) into the waste liquid collecting container 63;

7. stopping the rotation of the rotating disc body 22, controlling the diaphragm valve module 3 through the diaphragm valve control module 4 to close (or block) the discharge slot 224, and adding 5 ml to 10 ml of the good solvent into the rotating disc body 22;

8. the rotating disc body 22 is controlled to switch between high and low rotating speeds in a reciprocating manner, and quantum dot precipitates are fully contacted with a good solvent by utilizing Euler force, so that redissolution of the quantum dot precipitates is realized;

9. drawing out and collecting the redissolved quantum dot solution in the rotating disc body 22 from the opening 231 of the rotating disc cover plate 23 by using the quantum dot collecting module 5;

10. adding the good solvent again, controlling the rotating disk body 22 to switch between high and low rotating speeds in a reciprocating manner, and cleaning the inner wall surfaces of the rotating disk body 22 and the rotating disk cover plate 23;

11. stopping the rotation of the rotary disk body 22, opening the discharge groove 224, controlling the rotary disk body 22 to rotate at a low rotation speed, and emptying the waste liquid in the rotary disk body 22;

12. and (5) repeating the step 10 and the step 11, thoroughly cleaning the inner wall surfaces of the rotating disc body 22 and the rotating disc cover plate 23 by using a cleaning agent, spin-drying the rotating disc body 22 and the rotating disc cover plate 23 through a centrifugal effect, stopping rotation, and closing the discharge groove 224 to finish the purification work of the quantum dots.

While the foregoing is directed to the preferred embodiment of the present application, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the application.

Claims

1. A centrifugal purification system, comprising:

a rotating disk module including an opening and a discharge slot;

a valve module for controlling opening and closing of the discharge groove;

2. The centrifugal purification system of claim 1, wherein the rotating disk module comprises:

a shim disposed between the rotary disk body and the rotary disk cover plate.

3. The centrifugal purification system of claim 2, wherein the body bottom wall has a conical surface that is concave toward the center.

4. The centrifugal purification system of claim 2, wherein the valve module is a diaphragm valve module comprising:

the diaphragm valve seat is provided with a plunger hole;

5. The centrifugal purification system of claim 4,

the plunger is provided with threads and is in threaded connection with the plunger hole through the threads arranged on the plunger, the rotating position of the rotating disk module comprises a zero position,

6. The centrifugal purification system of claim 5, wherein the drive module comprises:

a sensor for detecting the zero position; and

7. The centrifugal purification system of claim 5,

the plunger is a butterfly bolt for control,

the diaphragm valve control module includes:

the adjusting motor is connected to the adapter plate;

8. The centrifugal purification system of claim 3, wherein the quantum dot collection module comprises:

a peristaltic pump comprising a suction end and a collection end;

a needle, a first connection tube, said needle being connected to said suction end of said peristaltic pump through said first connection tube, said needle being disposed at said opening of said rotating disc cover plate, said needle being capable of abutting against said body bottom wall of said rotating disc body, and said needle being disposed with a degree of freedom in a vertical direction; and

9. The centrifugal purification system of claim 1, wherein the waste liquid collection module comprises:

a collector having a collector opening disposed around the rotating disk module, the collector opening facing the rotating disk module, the collector opening for receiving waste liquid centrifugally thrown off by the rotating disk module,

a waste liquid collection container in communication with the collector.

10. The centrifugal purification system of claim 9, wherein the collector comprises a collector inner sidewall, a collector outer sidewall, and a collector bottom wall,