A dynamic crossflow based centrifugal membrane filtration device

Abstract

The utility model relates to centrifugal membrane technical field, concretely relates to a centrifugal membrane filtering device based on dynamic cross flow, a centrifugal membrane filtering device based on dynamic cross flow of the present application, through connecting centrifugal motor on centrifugal membrane assembly, centrifugal motor one end connects clear liquid storage jar, clear liquid storage jar connects gas source jar and vacuum pump on, the output end of vacuum pump connects material jar, clear liquid external discharge pipeline, material jar bottom connects circulating pump, circulating pump one end is linked with centrifugal membrane assembly bottom intercommunication, other end is linked with gas source jar intercommunication, to effectively combine centrifugal machine, cross flow filtration and the principle of negative pressure suction, make it not only have nanometer grade's filtration precision, can also guarantee stable operating performance and outstanding energy -saving effect, the device does not depend on circulating pump and provides high circulating flow and operating pressure, the device inside rotation helps material liquid separation and filtration, and the water side uses negative pressure suction, effectively improves the operation flux of membrane, reduces the energy consumption required for operation.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal membrane technology, specifically to a centrifugal membrane filtration device based on dynamic crossflow. Background Technology

[0002] Traditional tubular ceramic membranes are widely used in chemical, biopharmaceutical, and environmental water treatment industries. Tubular ceramic membranes require high surface flow velocities to flush away contaminant deposits, reduce fouling, and maintain stable flux. Therefore, the pumps in tubular ceramic membrane systems consume a lot of energy. The large size of tubular ceramic membranes results in a significant dead volume of material remaining in the pipes, preventing the material from achieving a high concentration ratio. In processes requiring elution, large amounts of eluent must be added, increasing the burden on subsequent processes. The high flow rate also leads to increased shear forces within the pump and pipes, which can adversely affect sensitive products, such as active proteins.

[0003] Centrifugal membrane filtration is a novel membrane filtration technology. The membranes are made of alumina ceramic and are used for solid-liquid separation, serving as a clarifying filter. Dynamic cross-flow centrifugal membrane filtration devices reduce membrane fouling by rotating the ceramic membrane, creating cross-flow between the material and the membrane surface. Traditional tubular ceramic membranes are static, relying on high-speed material flow to create cross-flow filtration. However, traditional tubular ceramic membrane filtration suffers from problems such as membrane clogging, high shear forces, and high energy consumption. Furthermore, when processing sensitive or high-viscosity products, it is not only inefficient and energy-intensive but may also fail to achieve the desired separation effect. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art and to provide a centrifugal membrane filtration device based on dynamic crossflow.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A centrifugal membrane filtration device based on dynamic cross-flow includes a centrifugal membrane assembly, a centrifugal motor connected to the centrifugal membrane assembly, a clear liquid storage tank connected to one end of the centrifugal motor, a gas source tank and a vacuum pump connected to the clear liquid storage tank, a material tank and a clear liquid discharge pipe connected to the output end of the vacuum pump, a circulation pump connected to the bottom of the material tank, one end of the circulation pump being connected to the bottom of the centrifugal membrane assembly and the other end being connected to the gas source tank.

[0006] Furthermore, the centrifuge membrane assembly is provided with a concentrate reflux pipe, and a reflux valve is connected to the concentrate reflux pipe. The output end of the reflux valve is connected to the material tank.

[0007] Furthermore, a pressure gauge is installed on the pipeline between the reflux valve and the material tank.

[0008] Furthermore, the centrifugal membrane assembly includes a cylindrical outer shell, a centrifugal membrane sheet is disposed inside the cylindrical outer shell, a rotating shaft is disposed inside the centrifugal membrane sheet, and the rotating shaft is connected to the centrifugal motor through a bearing installed inside the outer shell.

[0009] Furthermore, a circular threaded hole is provided at the bottom of the centrifugal motor, which serves as the filtrate outlet and is connected to the clear liquid storage tank.

[0010] Furthermore, a backflushing valve is installed on the pipeline between the clear liquid storage tank and the gas source tank.

[0011] Furthermore, an air supply valve is installed on the pipeline between the air source tank and the circulation pump.

[0012] Furthermore, a clear liquid discharge valve is installed on the clear liquid discharge pipeline, and the clear liquid discharge valve is connected to the material tank and the vacuum pump respectively.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] This application's centrifugal membrane filtration device effectively combines the principles of centrifuge, cross-flow filtration, and negative pressure suction, giving it both nanometer-level filtration precision and stable operating performance with excellent energy-saving effects. The device does not rely on a circulating pump to provide high circulation flow and operating pressure. The internal rotation of the device helps with the separation and filtration of the liquid and feed, while the negative pressure suction on the product water side effectively improves the membrane's operating flux and reduces the energy consumption required for operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the centrifugal membrane filtration device based on dynamic crossflow in a preferred embodiment of the present invention.

[0016] Attached reference numerals: 1. Gas source tank; 2. Gas supply valve; 3. Backflush valve; 4. Vacuum pump; 5. Pressure gauge; 6. Return valve; 7. Centrifugal membrane assembly; 8. Centrifugal motor; 9. Clear liquid storage tank; 10. Material tank; 11. Circulation pump; 12. Clear liquid discharge valve. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0018] Reference Figure 1As shown in the preferred embodiment of this utility model, a centrifugal membrane filtration device based on dynamic cross-flow includes a centrifugal membrane assembly 7, a centrifugal motor 8 connected to the centrifugal membrane assembly 7, a clear liquid storage tank 9 connected to one end of the centrifugal motor 8, a gas source tank 1 and a vacuum pump 4 connected to the clear liquid storage tank 9, and a material tank 10 and a clear liquid discharge pipe connected to the output end of the vacuum pump 4. A circulation pump 11 is connected to the bottom of the material tank 10, one end of the circulation pump 11 is connected to the bottom of the centrifugal membrane assembly 7, and the other end is connected to the gas source tank 1. This effectively combines the principles of centrifuge, cross-flow filtration and negative pressure suction, giving it both nanometer-level filtration accuracy and stable operating performance and excellent energy-saving effect. This device does not rely on a circulation pump to provide high circulation flow and operating pressure. The internal rotation of the device helps with material-liquid separation and filtration, while the negative pressure suction on the product water side effectively improves the membrane operating flux and reduces the energy consumption required for operation.

[0019] As a preferred embodiment of this utility model, it may also have the following additional technical features: the centrifuge membrane assembly 7 is provided with a concentrate reflux pipe, the concentrate reflux pipe is connected to a reflux valve 6, the output end of the reflux valve 6 is connected to the material tank 10; a pressure gauge 5 is installed on the pipe between the reflux valve 6 and the material tank 10.

[0020] In this embodiment, the centrifugal membrane assembly 7 includes a cylindrical outer shell made of a special material that is pressure-resistant, acid and alkali-resistant, and high-temperature resistant. A centrifugal membrane is disposed inside the cylindrical outer shell, and a rotating shaft is disposed inside the centrifugal membrane. The rotating shaft is connected to the centrifugal motor 8 through a corrosion-resistant long bearing installed inside the outer shell. A circular threaded hole is provided at the bottom of the centrifugal motor 8, which is a filtrate outlet. The filtrate outlet is connected to the clear liquid storage tank 9 to realize the discharge of filtrate.

[0021] In this embodiment, a backwash valve 3 is installed on the pipeline between the clear liquid storage tank 9 and the gas source tank 1, so that the valve of the filtrate storage tank can be switched to achieve backwashing; a gas supply valve 2 is installed on the pipeline between the gas source tank 1 and the circulation pump 11.

[0022] In this embodiment, a clear liquid discharge valve 12 is installed on the clear liquid discharge pipeline, and the clear liquid discharge valve 12 is connected to the material tank 10 and the vacuum pump 4 respectively. This facilitates the discharge of clear liquid.

[0023] The working principle of this utility model is as follows: The centrifugal membrane assembly consists of a cylindrical outer shell made of a special material that is pressure-resistant, acid and alkali-resistant, and high-temperature resistant. Inside, a corrosion-resistant long bearing is installed for mounting the centrifugal membrane elements. The centrifugal membrane elements are sealed within the special material shell. A matching centrifugal motor 8 is installed at the bottom of the shell and connected to the centrifugal membrane elements inside. A circular threaded hole is opened at the bottom of the centrifugal motor 8, serving as the filtrate outlet. At the filtrate outlet, there is a small-capacity clear liquid storage tank 9 made of a special material. The outlet end of the storage tank has a three-way connector; one end connects to an air source tank, and the other end connects to a product water vacuum pump 4. A circular threaded hole is opened at the bottom of the shell to connect a pipeline to a material tank 10, and a valve is installed. The centrifugal motor 8 and the circulation pump 11 are equipped with an automatic semi-automatic electrical control system and matching instruments and valves. Driven by the circulating pump 11, the device transports liquid from the material tank 10 to a special material tank containing the centrifugal membrane assembly 7, and starts the centrifugal motor 8 to drive the centrifugal membrane to rotate for centrifugation, so as to achieve the effect of centrifugation and separation and filtration of materials in the tank. The vacuum pump 4 is turned on, and under the negative pressure condition on the water production side, the filtrate that has passed through the membrane can be discharged and collected or returned to the material tank 10. At the same time, the backwash valve can be switched to achieve backwashing.

[0024] This application's centrifugal membrane filtration technology effectively combines the principles of centrifuges, cross-flow filtration, and negative pressure suction. It boasts nanometer-level filtration precision while ensuring stable operation and excellent energy efficiency. The system does not rely on a feed pump to provide high circulation flow and operating pressure; internal rotation aids in the separation and filtration process. Negative pressure suction on the product water side effectively increases membrane flux and reduces energy consumption. Utilizing the centrifugal force, hydraulic shear force, and turbulence of the filtrate generated by rotation, the filter layer on the membrane surface can be efficiently removed, eliminating extreme concentration differences and reducing fouling such as salt crystallization, scaling, gel layers, and organic matter. This significantly extends the chemical cleaning cycle of the filter membrane, and the system does not require high flow rates or high pressures, greatly saving energy. Rotational cross-flow allows for higher throughput, more efficient filtration, more concentrated filtrate, and lower energy consumption. Furthermore, because high-speed flushing is not required, the shear force on the pump and pipeline is greatly reduced, making it suitable for filtering sensitive materials. This device has a small footprint, small dead volume, and high concentration factor. In processes requiring water elution, it can significantly reduce the amount of elution water. The centrifugal membrane operates at low pressure, resulting in minimal membrane fouling, and the membrane flux is easily cleaned and restored.

[0025] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0026] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A centrifugal membrane filtration device based on dynamic cross-flow, characterized in that: The device includes a centrifuge membrane assembly, a centrifuge motor connected to the centrifuge membrane assembly, a clear liquid storage tank connected to one end of the centrifuge motor, a gas source tank and a vacuum pump connected to the clear liquid storage tank, a material tank and a clear liquid discharge pipe connected to the output end of the vacuum pump, a circulation pump connected to the bottom of the material tank, one end of the circulation pump being connected to the bottom of the centrifuge membrane assembly and the other end being connected to the gas source tank.

2. The centrifugal membrane filtration device based on dynamic cross-flow according to claim 1, characterized in that: The centrifuge membrane assembly is equipped with a concentrate reflux pipe, and a reflux valve is connected to the concentrate reflux pipe. The output end of the reflux valve is connected to the material tank.

3. The centrifugal membrane filtration device based on dynamic cross-flow according to claim 2, characterized in that: A pressure gauge is installed on the pipeline between the reflux valve and the material tank.

4. The centrifugal membrane filtration device based on dynamic cross-flow according to claim 1, characterized in that: The centrifugal membrane assembly includes a cylindrical outer shell, a centrifugal membrane sheet is disposed inside the cylindrical outer shell, and a rotating shaft is disposed inside the centrifugal membrane sheet. The rotating shaft is connected to the centrifugal motor through a bearing installed inside the outer shell.

5. The centrifugal membrane filtration device based on dynamic cross-flow according to claim 1, characterized in that: The centrifugal motor has a circular threaded hole at its bottom, which serves as the filtrate outlet and is connected to the clear liquid storage tank.

6. The centrifugal membrane filtration device based on dynamic cross-flow according to claim 1, characterized in that: A backflushing valve is installed on the pipeline between the clear liquid storage tank and the gas source tank.

7. The centrifugal membrane filtration device based on dynamic cross-flow according to claim 1, characterized in that: An air supply valve is installed on the pipeline between the air source tank and the circulation pump.

8. The centrifugal membrane filtration device based on dynamic cross-flow according to claim 1, characterized in that: The clear liquid discharge pipeline is equipped with a clear liquid discharge valve, which is connected to the material tank and the vacuum pump respectively.

Images