Tubular membrane on-line cleaning device

Abstract

The utility model discloses an on-line cleaning device for a tubular membrane, which is applied to a tubular membrane element. The cleaning devices are symmetrically arranged on the two sides of the tubular membrane, and each cleaning device comprises a cover plate part and a vibration part arranged on one side of the cover plate part; wherein the cover plate part is of a cylindrical structure and is mounted at the end part of the tubular membrane shell, a flow guide part is attached to one side of the cover plate part and is used for guiding water flow to pass through and enter the membrane element, and concentrated water is guided to be discharged through the flow guide part on the opposite side; the number of the vibration parts is at least two, and the vibration parts are thin and long cylinders, are inserted between membrane interlayers in a membrane tube of the tubular membrane and are used for vibrating to drive pollutants in the membrane tube to fall off through the cavitation action of formed violent turbulent flow and generated bubbles; the ultrasonic vibration probe capable of extending into the tubular membrane is arranged, attachments on the surface of the membrane fall off according to the ultrasonic principle, and online non-stop pollutant cleaning can be achieved by matching with the water guide opening additionally formed in the end cover.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment membrane cleaning devices, in particular to an online tubular membrane cleaning device. Background Art

[0002] In the process of sewage treatment, pollutants can easily accumulate on the surface of the existing tubular membranes. In the pollution control of conventional membrane elements, such as spiral membranes and hollow fiber membranes, due to structural limitations, high-low frequency switching, that is, flow rate changes, is more often used to control the membrane pollution without stopping operation. Moreover, when the membrane pollution accumulates to a certain extent, it is still necessary to stop the machine for flushing with clean water or produced water to flush the pollutants formed on the membrane surface. The flushing interval is generally several hours, and the flushing time ranges from a few minutes to more than ten minutes.

[0003] Publication number CN116851353A discloses an ultrasonic membrane cleaning device, which is composed of a cleaning box, a mounting frame is provided in the inner cavity of the cleaning box, a plurality of membrane shell ends are fixedly installed on the mounting frame from top to bottom, one end of the tubular membrane to be cleaned is detachably connected to the membrane shell end, a plurality of ultrasonic transducers are respectively arranged on both sides of the tubular membrane to be cleaned, a spacing adjustment mechanism is arranged on the mounting frame, and the ultrasonic transducer is driven close to or away from the tubular membrane to be cleaned by the spacing adjustment mechanism, a control cabinet is arranged outside the cleaning box, and the control cabinet is electrically connected to the ultrasonic transducer. It uses an offline cleaning method to process the tubular membrane to be cleaned, so that the tubular membrane to be cleaned immersed in the cleaning box is convenient for ultrasonic cleaning. However, this scheme is separated from the membrane system, and the running membrane system still needs to be shut down during operation.

[0004] Therefore, the utility model proposes a tubular membrane online cleaning device. Summary of the invention

[0005] In view of the above technical problems, the utility model provides an online cleaning device for tubular membranes. By providing an ultrasonic vibrating probe that can extend into the membrane tube of the tubular membrane, the device will not hinder the operation of the membrane element, but will also utilize the principle of ultrasound to remove attachments on the membrane surface from the inside out. Combined with the additional water guide port at the end cover, the device can clean pollutants without stopping the machine.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical means:

[0007] A tubular membrane online cleaning device, applied to tubular membrane elements;

[0008] The cleaning device is symmetrically arranged on both sides of the tubular membrane, and comprises a cover plate portion and a vibrating portion arranged on one side of the cover plate portion;

[0009] Among them, the cover plate part is a cylindrical structure, which is installed at the end of the tubular membrane shell. A flow guiding component is attached to one side of the cover plate part to guide water flow to enter the inside of the membrane element, and the concentrated water is discharged through the flow guiding component on the opposite side cover plate part;

[0010] There are at least two vibration parts, which are set as slender cylinder structures and inserted into the inside of the tubular membrane tube to drive the pollutants inside the membrane tube to fall off by forming violent turbulent flow and cavitation of bubbles through vibration.

[0011] The cover plate part includes:

[0012] An end cover, which is a hollow cylindrical structure, and an ultrasonic generator for controlling the vibration part is arranged inside it;

[0013] A diversion pipe, which is a tubular structure, and diversion pipes are arranged on its side wall in the vertical direction to guide water flow to enter and make the water flow pass through the tubular membrane along the central axis direction of the tubular membrane.

[0014] An air cooling system is arranged on the side of the end cover away from the vibration part, and the air cooling system is used to introduce external air to cool the ultrasonic generator;

[0015] Heat dissipation grooves for discharging internal air are arranged on the side wall of the end cover.

[0016] A heat dissipation screen is arranged inside the heat dissipation groove.

[0017] The vibration part is an ultrasonic probe, and its diameter is 4 - 25 mm.

[0018] A rubber ring for sealing is arranged at the connection between the ultrasonic probe and the cover plate part.

[0019] Beneficial effects:

[0020] The anti-blocking device of the present utility model can inhibit the formation and accumulation of membrane pollutants on the membrane surface by setting probes that can be inserted into the inside of the membrane tube, making the probes vibrate the flowing water to generate bubbles, turbulent flow and physical vibration; then, when the water flow guided by the diversion pipe flushes the inside of the membrane tube, the pollutants can also be taken out synchronously, enhancing the flushing effect, achieving the effect of inhibiting pollutant accumulation, extending the operation cycle and membrane life of the tubular membrane under long-term operation conditions without shutting down the machine. Description of the drawings

[0021] Figure 1 It is a schematic structural diagram of the cooperation between the end cover and the probe of the on-line cleaning device for the tubular membrane of the present utility model;

[0022] Figure 2 It is a schematic structural diagram inside the end cover of the on-line cleaning device for the tubular membrane of the present utility model;

[0023] Figure 3 It is an exploded schematic diagram of the structure of the in-line cleaning device for the tubular membrane of the present utility model;

[0024] Figure 4 It is a cross-sectional view of the in-line cleaning device for the tubular membrane of the present utility model;

[0025] Figure 5 It is a working schematic diagram of the probe of the in-line cleaning device for the tubular membrane of the present utility model releasing turbulent flow;

[0026] Figure 6 It is a working schematic diagram of the probe of the in-line cleaning device for the tubular membrane of the present utility model releasing bubbles.

[0027] In the figure: 1. End cover; 11. Ultrasonic generator; 12. Heat dissipation groove; 13. Air cooling system; 2. Probe; 3. Diversion pipe; 31. Water inlet pipe; 32. Water outlet pipe; 4. Tubular membrane element. Specific implementation manner

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below in combination with the specification drawings and specific implementation manners.

[0029] A schematic diagram of an in-line cleaning device for a tubular membrane of the present utility model is as Figures 1-6 shown, and it is applied to the tubular membrane;

[0030] The ultrasonic cleaning device of the present utility model is as Figures 1-2 shown, and its main components include a cover plate part and a vibration part provided on one side of the cover plate part, which are symmetrically arranged on both sides of the tubular membrane; the cover plate part is a cylindrical structure, and the end of the tubular membrane shell is connected to the diversion component through a flange or a pipe clamp. The side wall of the diversion component is provided with a diversion port for water flow to pass through, so as to guide the water flow to enter the inside of the membrane element, and the concentrated water is discharged through the diversion component on the opposite cover plate part; that is, the diversion component on one side cover plate part guides the water flow to enter, and the diversion component on the other side cover plate part guides the concentrated water to flow out; the vibration part is at least two, and it is set as a slender columnar structure and inserted into the membrane tube to vibrate the passing water flow and the cavitation effect of the generated bubbles to drive the pollutants inside the membrane to fall off. Among them, the vibration part is an ultrasonic probe, and its diameter is 4 - 25 mm. The corresponding probe size can be selected according to the different diameters of the membrane tubes, and the length of the probe can also be selected according to the different lengths of the membrane shell.

[0031] Therefore, the utility model can use the probe to penetrate into the tubular membrane, and through ultrasonic action, clean the internal pollution of the membrane and inhibit the generation of membrane pollution during operation. At the same time, according to the material, strength and requirements of the tubular membrane element, the frequency of the ultrasonic wave can be controlled between 0 and 100 kHz, ensuring that the pollutants on the membrane surface are removed on the basis of not corroding or damaging the membrane element and affecting its service life.

[0032] Specifically, the cover part includes: an end cover, which is a hollow cylindrical structure, and an ultrasonic generator for controlling the vibration part is arranged inside it; specifically, the ultrasonic oscillator, coil, heat dissipation and wiring, etc. that make up the ultrasonic generator are integrated inside the end cover. At the same time, the ultrasonic generator also has a control panel, power supply and other systems, which are convenient for operators to control the ultrasonic system and realize operation control functions including adjusting the frequency size and running time.

[0033] Furthermore, in order to ensure the sealing and pressure resistance of the connection between the probe and the end cover, a rubber ring for sealing is arranged at the connection between the probe and the end cover; alternatively, the probe and the end cover can be connected in forms such as flexible connection, mechanical seal, and PVC casting.

[0034] Furthermore, a diversion pipe is arranged at the end cover where the probe is provided. It is a tubular structure, and diversion pipes are provided on its side wall in the vertical direction for guiding water flow to enter and pass through the membrane tube along its central axis direction; the diversion pipe can be sealed and connected to the membrane shell and the end cover through pipe clamps; as Figure 4 shown, the water flow flows into the tubular membrane through the water inlet pipe of the diversion pipe at one end of the membrane, and then discharges the concentrated water generated inside the tubular membrane along the water outlet pipe; among them, the water produced by the original tubular membrane is still produced by the two water production pipes on the side of the tubular membrane.

[0035] Furthermore, in order to improve the heat dissipation effect of the ultrasonic system, an air-cooling system is arranged on the side of the end cover away from the vibration part. The air-cooling system is used to introduce external air to cool the ultrasonic generator; at the same time, heat dissipation grooves for discharging internal air are opened on the side wall of the end cover; and in order to prevent external dust from entering the inside of the end cover and causing damage to the mechanism, a heat dissipation screen is arranged inside the heat dissipation groove.

[0036] Specifically, the ultrasonic generator mainly controls the vibration of the water flow of the probe through an ultrasonic homogenizer, and there are various types of ultrasonic homogenizers with different shapes and sizes; the probe-type ultrasonic homogenizer adopted in this application can stir the surrounding fluid to form intense turbulence, as Figure 5 shown; at the same time, a large number of bubbles can be generated at the end of the probe, and a certain amount of bubbles can also be generated around the probe, as Figure 6 shown.

[0037] Therefore, under the combined action of intense turbulent water flow, ejected bubbles, and the vibration of the probe-driven medium water, the pollutants inside the tubular membrane can be quickly and effectively removed, and various pollutants such as fibrous, viscous, and scale on the membrane surface can be effectively detached and washed away with the water flow.

[0038] Furthermore, according to actual requirements and effects, the present application can increase or decrease the number of probes, the length of the probes, etc., so that it can adapt to different scenarios and technical conditions. At the same time, the end caps can generally be made of common materials such as PVC and stainless steel, with sufficient pressure resistance, corrosion resistance, and sealing performance; correspondingly, the probes can generally be made of metals with relatively high strength such as stainless steel, titanium, and aluminum.

[0039] Working principle:

[0040] During the operation of the tubular membrane system, the ultrasonic generator can be manually or automatically turned on for a certain period of time, so that the ultrasonic probe controls the flowing water, generates bubbles, turbulence, and physical vibration, and inhibits the formation and accumulation of membrane fouling. Furthermore, it inhibits the formation and accumulation of membrane fouling substances on the membrane surface. Subsequently, when the water flow guided by the diversion pipe flushes the inside of the membrane tube, the pollutants can also be carried out synchronously, enhancing the flushing effect.

[0041] When the membrane flux drops to a certain level and chemical cleaning is carried out on the membrane element on site, a cleaning agent that can dissolve some pollutants can also be added to synchronously start the chemical cleaning and vibration cleaning processes to enhance the flushing and cleaning effects.

[0042] When the ultrasonic generator vibrates, the air-cooling system is synchronously turned on, introducing low-temperature external air, and taking away the heat on the surface of the ultrasonic generator from the heat dissipation slots at the end cap interior by means of the flowing wind.

Claims

1. A tubular membrane on-line cleaning device is applied to a tubular membrane element; characterized in that: The cleaning devices are symmetrically arranged on both sides of the tubular membrane, and each cleaning device includes a cover plate part and a vibration part arranged on one side of the cover plate part; Among them, the cover plate part is a cylindrical structure, which is installed at the end of the tubular membrane shell. A flow guiding component is attached to one side of the cover plate part to guide water flow to enter the interior of the membrane element, and the concentrated water is discharged through the flow guiding component on the opposite side; There are at least two vibration parts, which are arranged as slender columnar structures and inserted into the inner part of the membrane tube of the tubular membrane, and are used to drive the pollutants inside the membrane tube to fall off by forming violent turbulent flow and cavitation of bubbles through vibration.

2. The tubular membrane in-line cleaning device according to claim 1, characterized in that, The cover plate part includes: An end cover, which is a hollow cylindrical structure, and an ultrasonic vibrator for controlling the vibration part is arranged inside it; A flow guiding pipe, which is a tubular structure, and flow guiding pipes are arranged on its side wall in the vertical direction to guide water flow to enter and make the water flow pass through the tubular membrane along the central axis direction of the tubular membrane.

3. The tubular membrane on-line cleaning device according to claim 2, characterized in that: An air cooling system is arranged on the side of the end cover away from the vibration part, and the air cooling system is used to introduce external air to cool the ultrasonic generator; Heat dissipation grooves for discharging the internal gas are formed on the side wall of the end cover.

4. The tubular membrane on-line cleaning device according to claim 3, characterized in that: A heat dissipation screen is arranged inside the heat dissipation groove.

5. The tubular membrane on-line cleaning device according to claim 1, characterized in that: The vibration part is an ultrasonic probe, and its diameter is 4 - 25 mm.

6. The tubular membrane on-line cleaning device according to claim 5, characterized in that: A rubber ring for sealing is arranged at the connection between the ultrasonic probe and the cover plate part.

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