Membrane ultrasonic and synchronous incrustation removal ultrafiltration device and control method thereof

Abstract

The invention belongs to the field of water treatment technologies, and relates to a membrane ultrasonic and synchronous incrustation removal ultrafiltration device and a control method of the membrane ultrasonic and synchronous incrustation removal ultrafiltration device. A water inlet end ultrasonic contacting cavity and a water outlet end ultrasonic contacting cavity are arranged in the ultrafiltration device, an ultrasonic and synchronous incrustation removal system is installed inside the ultrafiltration device, and the ultrasonic and synchronous incrustation removal system mainly comprises an ultrasonic transducer, a connecting cable, an ultrasonic generator and a microcomputer time controller. When the ultrafiltration device works normally, ultrasonic and synchronous cleaning is controlled to be carried out on the ultrafiltration device through the time controller, the situation that incrustation crystals are attached to the surface of a membrane and grow into compact and stable incrustation can be avoided, membrane pollution is effectively controlled, and the cleaning period of the membrane is prolonged; through ultrasonic oscillation, the water flow state of on the surface of the membrane can be changed, and the phenomenon of concentration polarization on the surface of the membrane can be reduced. Meanwhile, when the ultrafiltration device is used for thorough cleaning, the ultrafiltration device can assist in mechanical cleaning, and therefore the cleaning effect is improved. By the adoption of the membrane ultrasonic and synchronous incrustation removal ultrafiltration device and the control method of the membrane ultrasonic and synchronous incrustation removal ultrafiltration device, the phenomenon of incrustation formation on the surface of the membrane can be effectively controlled, the purposes of maintaining high membrane flux, improving the working efficiency of the membrane and prolonging the service life can be achieved, and the application and popularization prospects are good.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a membrane ultrasonic synchronous descaling ultrafiltration device and a control method thereof. Background technique [0002] Ultrafiltration is a separation method that uses a microporous membrane as a medium to intercept high-molecular organic matter that cannot be separated by ordinary filtration. Because water contains hardness ions such as calcium and magnesium, membrane fouling often occurs during the operation of ultrafiltration devices, resulting in membrane clogging, reducing membrane flux and affecting the normal operation of membrane modules. At present, the methods to solve the fouling of membrane modules mainly include chemical cleaning method and physical cleaning method. The chemical cleaning method refers to soaking and cleaning the membrane with chemical agents such as citric acid; the physical cleaning method refers to manual, mechanical cleaning and oth...

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Problems solved by technology

Due to hardness ions such as calcium and magnesium in the water, membrane fouling often occurs during the operation of the ultrafiltration device, causing membrane clogging, reducing the membrane flux and affecting the normal operation of the membrane module.

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