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

An ultrasonic and ultrasonic technology, applied in the field of water treatment, can solve problems such as affecting the normal operation of membrane modules, reducing membrane flux, membrane scaling, etc., to reduce the phenomenon of concentration polarization, prevent adhesion, and prolong the service life.

Inactive Publication Date: 2015-04-22
HEBEI HAOYUAN ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0035] like figure 1 As shown, the ultrafiltration device is ultrasonically cleaned synchronously, and the ultrafiltration device is working normally. At this time, the cleaning water inlet valve 15 and the sewage outlet valve 17 on the ultrafiltration device are closed, and the raw water inlet valve 2, the permeate outlet valve 6 and the concentrated Liquid outlet valve 19, then start the ultrafiltration device to separate work. The raw water enters the ultrasonic contact chamber 3 at the water inlet from the raw water tank 22 through the raw water inlet pipe 29 and is powered by the raw water inlet pump 26 from the water inlet 1 through the raw water inlet valve 2, and then enters the hollow fiber membrane 4 for separation and purification. After the liquid enters the ultrasonic contact chamber 5 at the water outlet, after passing through the permeate outlet valve 6, the permeate outlet 7 is discharged into the permeate water tank 21 through the permeate outlet pipe 24 power...

Embodiment approach 2

[0038] like figure 1 As shown, the ultrafiltration device is heavily washed, and the ultrafiltration device stops working. At this time, the raw water inlet valve 2, the permeate outlet valve 6 and the concentrated solution outlet valve 19 are closed, and the cleaning water inlet valve 15 and the sewage outlet valve 17 are opened. Clean the filter device. Cleaning water and acid or oxidant cleaning agents enter the ultrafiltration device from the chemical metering tank 27 through the chemical metering pump 28 from the cleaning water inlet 14 through the cleaning water inlet valve 15. The ultrasonic transducer 8 and the ultrasonic generator 9 work continuously, and the ultrasonic Combined cleaning with acid or oxidizing agent, the cleaning waste liquid is discharged from the sewage outlet 16 and the sewage outlet valve 17, and finally the membrane flux of the ultrafiltration device is restored, and the large cleaning work of the ultrafiltration device is stopped. When the ultr...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44B01D65/08B01D61/20
Inventor 霍然韩学滨张凡王凯易向楠
Owner HEBEI HAOYUAN ENVIRONMENTAL ENG
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