Tubular ultrafiltration membrane ultrasonic online cleaning device and ultrafiltration equipment

Abstract

The utility model relates to the technical field of ultrafiltration membranes, in particular to a tubular ultrafiltration membrane ultrasonic online cleaning device and ultrafiltration equipment. The sound wave shell is arranged on the tubular ultrafiltration membrane shell in a sleeving manner; the ultrasonic generation controller is arranged in the ultrasonic shell, the ultrasonic vibrators are located in the ultrasonic shell and circumferentially arranged on the membrane shell, the ultrasonic vibrators are electrically connected with the ultrasonic generation controller to generate vibration, and impurities on the ultrafiltration membrane in the membrane shell are removed. According to the tubular ultrafiltration membrane cleaning device, the labor intensity of workers is increased, the efficiency is low, the tubular ultrafiltration membrane does not need to be disassembled when being cleaned, the labor intensity of the workers is relieved, water resources are saved, and the cleaning efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrafiltration membranes, in particular to an ultrasonic on-line cleaning device for tubular ultrafiltration membranes and an ultrafiltration device. Background Technique

[0002] Due to its good operating environment and high membrane flux, tubular ultrafiltration membranes are widely used in the sewage treatment industry, especially in the fields of landfill leachate treatment and kitchen waste biogas slurry treatment. However, during the long-term operation of tubular ultrafiltration membranes, the problem of fouling and blockage of membrane pores inside the membrane often occurs, resulting in problems such as a decrease in the water production flow rate and circulation flow rate of the ultrafiltration membrane, and an increase in membrane pressure. The main reason for this problem is that the leachate and kitchen waste biogas slurry have complex water inflow conditions, and spherical or fibrous solid substances in the pre-ultrafiltration filter pass through the filter screen and accumulate and block at the membrane end and inside the membrane tube after entering the ultrafiltration system, thereby reducing the membrane performance.

[0003] When cleaning tubular ultrafiltration membranes, the method of shutdown and off-line cleaning is generally used. High-pressure water and hoses are used to dredge the ultrafiltration membrane pores one by one, or the tubular ultrafiltration membrane needs to be disassembled. This process consumes a large amount of labor and water resources, and the efficiency is generally low. At the same time, it affects the water production of the sewage treatment system.

[0004] For example, Chinese Patent CN213556373U discloses an automatic blockage removal device for a tubular membrane module. It realizes the automatic detection and control of the propulsion force of the membrane-passing water pipe, improves work efficiency, reduces labor costs, and not only meets the needs of blockage removal but also does not cause damage to the membrane module due to excessive thrust. This patent cannot achieve on-line cleaning of the membrane module and needs to be used after manual disassembly of the membrane module.

[0005] Therefore, the utility model provides an ultrasonic on-line cleaning device for tubular ultrafiltration membranes and an ultrafiltration device. Content of the Utility Model

[0006] The purpose of the utility model is to provide an ultrasonic on-line cleaning device for tubular ultrafiltration membranes and an ultrafiltration device, which solves the problems that when cleaning tubular ultrafiltration membranes, a large amount of water resources need to be consumed and disassembly cleaning is required, increasing the labor intensity of workers and having low efficiency. When cleaning tubular ultrafiltration membranes, disassembly is not required, the labor intensity of workers is reduced, water resources are saved, and the cleaning efficiency is greatly improved.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions: An ultrasonic on-line cleaning device for tubular ultrafiltration membranes, comprising:

[0008] An ultrasonic generator controller;

[0009] An acoustic shell sleeved on the membrane shell of the tubular ultrafiltration membrane;

[0010] Multiple acoustic wave oscillators, located inside the acoustic wave housing, are circumferentially arranged on the membrane housing. The acoustic wave oscillators are electrically connected to the ultrasonic generation controller to generate vibrations, and remove impurities on the ultrafiltration membrane inside the membrane housing.

[0011] Preferably, the bottom surface of the acoustic wave oscillator is an arc-shaped structure and fits with the outer surface of the membrane housing.

[0012] Preferably, an ultrafiltration device includes:

[0013] A tubular ultrafiltration membrane, including a membrane housing and a filter membrane provided inside the membrane housing; characterized in that it further includes: the tubular ultrafiltration membrane ultrasonic on-line cleaning device as described in claim 1.

[0014] Preferably, the tubular ultrafiltration membrane further includes a circulation flowmeter, and the ultrasonic generation controller is connected to the circulation flowmeter to start and stop according to the corresponding circulation flow.

[0015] Preferably, the tubular ultrafiltration membrane further includes a pressure gauge, the pressure gauge is used to detect the pre-membrane pressure, and the ultrasonic generation controller is connected to the pressure gauge to start and stop according to the corresponding pre-membrane pressure.

[0016] Preferably, the material of the membrane housing is ceramic.

[0017] Advantages of the present utility model:

[0018] By providing an ultrasonic cleaning device on the outer shell of the ultrafiltration membrane pipe fitting of the present utility model, the ultrasonic cavitation effect is used to peel and clean the dirt inside the membrane pores, which can be operated online and achieve automatic control; the cleaning process does not require offline shutdown, and there is no need to manually remove the membrane pipe fitting for manual dirt cleaning. The operating environment is good and the degree of automation is high; it reduces the labor intensity of workers, saves water resources, and greatly improves the cleaning efficiency. Description of the drawings

[0019] Figure 1 It is a schematic diagram of the overall ultrafiltration device of the present utility model.

[0020] Figure 2 It is a sectional view of the ultrafiltration device of the present utility model.

[0021] In the figure: 1. Ultrasonic generation controller; 2. Acoustic wave housing; 3. Membrane housing; 4. Acoustic wave oscillator. Specific embodiments

[0022] The following further describes the usage method of the present utility model in conjunction with the drawings and specific embodiments.

[0023] As Figure 1 and Figure 2 shown, a tubular ultrafiltration membrane ultrasonic on-line cleaning device includes:

[0024] Ultrasonic generator controller

[0025] The ultrasonic generator controller is powered by 380V and is internally equipped with a PLC control. It is interlocked with the original circulating flowmeter and the pressure transmitter before the membrane in the system. The ultrasonic generator controller is interlocked with the existing circulating flowmeter in the membrane system to start. When the circulating flow drops by 5% or the pressure reading before the membrane rises by 3%, it automatically starts and continues to run until the circulating flow recovers and then stops running. It runs intermittently to clean the fouled membrane holes of the ultrafiltration membrane pipe fittings. It runs continuously during the cleaning stage and chemical cleaning stage of the ultrafiltration system to achieve on-line cleaning of the membrane holes of the ultrafiltration membrane pipe fittings, so as to maintain the water production performance of the ultrafiltration membrane system.

[0026] The acoustic wave housing is sleeved on the tubular ultrafiltration membrane housing; the acoustic wave housing is made of stainless steel and is used to protect the internal equipment.

[0027] A plurality of acoustic wave oscillators are located inside the acoustic wave housing and are circumferentially arranged on the membrane housing. The acoustic wave oscillators are electrically connected to the ultrasonic generator controller to generate vibrations to remove impurities on the ultrafiltration membrane inside the membrane housing.

[0028] Vibrations are generated by the acoustic wave oscillators to remove impurities on the ultrafiltration membrane inside the membrane housing, and the power bus is connected to the acoustic wave oscillators through oscillator shunt wires.

[0029] It should be noted that the oscillator frequency is 20kHz - 28kHz, and the power of each oscillator is 20W - 25W, which is determined according to the water quality of different projects; and the oscillator shunt wire is responsible for the power supply and control of the acoustic wave oscillator.

[0030] The bottom surface of the acoustic wave oscillator is an arc-shaped structure and fits with the outer surface of the membrane housing.

[0031] The bottom surface of the acoustic wave oscillator is an arc-shaped structure and fits with the outer surface of the membrane housing. The bottom surface of the acoustic wave oscillator is an arc-shaped structure that fits perfectly with the surface of the membrane housing without gaps, which is to maximize the transfer of the energy of the acoustic wave oscillator, thereby improving the cleaning effect of the ultrafiltration membrane.

[0032] Another embodiment of the present application further provides an ultrafiltration device, including:

[0033] A tubular ultrafiltration membrane, including a membrane housing and a filter membrane disposed inside the membrane housing; characterized in that it further includes: the tubular ultrafiltration membrane ultrasonic on-line cleaning device as described in claim 1.

[0034] The tubular ultrafiltration membrane further includes a circulating flowmeter, and the ultrasonic generator controller is connected to the circulating flowmeter to start and stop according to the corresponding circulating flow.

[0035] The tubular ultrafiltration membrane further includes a pressure gauge for detecting the pre-membrane pressure. The ultrasonic generation controller is connected to the pressure gauge to start and stop according to the pre-membrane pressure.

[0036] The membrane shell is made of ceramic, or it can also be made of stainless steel.

[0037] After setting up the interlock program, the entire ultrafiltration ultrasonic on-line cleaning device operates automatically. During the cleaning process, there is no need to remove the membrane module or related pipe fittings for cleaning, and it can operate without stopping.

[0038] Working process: When cleaning the ultrafiltration membrane, first, when the circulating flow rate drops by 5% or the pre-membrane pressure reading rises by 3%, the ultrasonic generator is automatically started and runs continuously until the circulating flow rate recovers and then stops running. It runs intermittently to clean the fouling of the membrane holes in the ultrafiltration membrane pipe fittings. During the cleaning stage and chemical cleaning stage of the ultrafiltration system, it runs continuously to achieve on-line cleaning of the membrane holes in the ultrafiltration membrane pipe fittings to maintain the water production performance of the ultrafiltration membrane system.

[0039] After the ultrasonic generator is started, it needs to be transmitted through the power bus to the oscillator tap line on the acoustic wave housing, and then through the oscillator tap line to the acoustic wave oscillator, so that the oscillator vibrates and vibrates at a vibration frequency between 20 kHz and 28 kHz, thereby removing the impurities on the ultrafiltration membrane. During the cleaning process, there is no need to remove the membrane module or related pipe fittings for cleaning, and it can operate without stopping.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An on-line ultrasonic cleaning device for tubular ultrafiltration membrane, characterized in that, Comprising: An ultrasonic generating controller (1); An acoustic wave housing (2) sleeved on a tubular ultrafiltration membrane housing (3); A plurality of acoustic wave oscillators (4) located inside the acoustic wave housing (2), circumferentially arranged on the membrane housing (3), the acoustic wave oscillators (4) being electrically connected to the ultrasonic generating controller (1) to generate vibrations for removing impurities on the ultrafiltration membrane inside the membrane housing (3).

2. The on-line ultrasonic cleaning device for tubular ultrafiltration membrane according to claim 1, characterized in that: The bottom surface of the acoustic wave oscillator (4) is of an arc structure and fits with the outer surface of the membrane housing (3).

3. An ultrafiltration device, characterized in that, Comprising: A tubular ultrafiltration membrane, including a membrane housing (3) and a filter membrane disposed inside the membrane housing (3); characterized in that it further comprises: The tubular ultrafiltration membrane ultrasonic on-line cleaning device according to claim 1.

4. The ultrafiltration device according to claim 3, characterized in that: The tubular ultrafiltration membrane further comprises a circulation flowmeter, and the ultrasonic generating controller is connected to the circulation flowmeter to start and stop according to the corresponding circulation flow.

5. The ultrafiltration device according to claim 3, characterized in that: The tubular ultrafiltration membrane further comprises a pressure gauge for detecting the pre-membrane pressure, and the ultrasonic generating controller is connected to the pressure gauge to start and stop according to the corresponding pre-membrane pressure.

6. The ultrafiltration device according to claim 3, characterized in that: The material of the membrane housing (3) is ceramic.

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