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Film Pollution treating ultrasonic wave and magnetic field equipment

A technology of ultrasonic and membrane fouling, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., to achieve the effect of preventing membrane fouling, saving costs, and having a simple structure

Inactive Publication Date: 2003-05-14
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a device for preventing and controlling membrane pollution by ultrasonic and magnetic fields in view of the shortcomings of the above-mentioned membrane cleaning method. secondary pollution, simplify the operation process and reduce the cost of use

Method used

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  • Film Pollution treating ultrasonic wave and magnetic field equipment
  • Film Pollution treating ultrasonic wave and magnetic field equipment
  • Film Pollution treating ultrasonic wave and magnetic field equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Such as figure 1 As shown, the membrane module 5 is a hollow structure of a garden barrel, with both ends closed, and its inner layer is an ultrafiltration membrane made of fiber material, and the outer wall is a cover body made of stainless steel. Water inlet 7, water outlet 1, backwash outlet 2 and concentrate outlet 8, and a water outlet 1 is provided on one end face. The ultrafiltration membrane can be backwashed through the backwash port 2, and the dirt is discharged from the concentrate outlet 8. Two pairs of tile-shaped permanent magnets 4 are fixed on the outer wall of the membrane module 5, and three ultrasonic transducers 3 are installed at intervals with the permanent magnets 4. The magnetic field strength of the permanent magnets 4 is 0.2T, and each ultrasonic transducer The power of the transducer is 10W, and all the transducers are connected in parallel to an ultrasonic power generator with an output frequency of 45KHz. A tubular plastic protective cover...

Embodiment 2

[0018] Such as figure 2 , image 3 As shown, the membrane module 5 is a hollow barrel structure, the inner layer is a roll-type reverse osmosis membrane made of aromatic polyamide composite material, the outer wall is a cover body, and the maximum operating pressure of the membrane is 8.27Mpa. A water inlet 1 and a water outlet 7 are respectively provided at both ends of the membrane module 5 , and permanent magnets 4 are respectively installed on the outer sides of the water inlet and the water outlet, and the magnetic field strength thereof is 0.25T. Five ultrasonic transducers 3 are installed alternately on the outer wall of the membrane assembly 5, each ultrasonic transducer has a power of 30W, and all transducers are connected in parallel to an ultrasonic power generator with an output frequency of 45KHz. A tubular plastic protective cover 6 is set outside the ultrasonic transducer 3 . After using the invention, in the seawater desalination process, its cleaning freque...

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Abstract

Ultrasonic wave with cavitation and magnetic field with scale preventing effect are used together in preventing membrane pollution. The apparatus consists of supersonic wave generator installed inside or outside the membrane module and permanent magnets set on outer wall of the membrane module. Ultrasonic wave produces vibration to prevent colloid particle, bacteria and organic matter from depositing on the membrane and its cavitation produces great amount of bubbles to clean the dirt on the membrane. Magnetic field is utilized to prevent calcium, magnesium and other inorganic ions from depositing on the membrane. Their combination produces excellent effect of preventing and eliminating the membrane pollution. The strengths of the ultrasonic wave and the magnetic field are relatively low and thus there will be no damage to the membrane.

Description

technical field [0001] The invention relates to a device for preventing and treating membrane pollution, in particular to a device for preventing and controlling membrane pollution such as microfiltration, ultrafiltration and reverse osmosis through the joint action of an ultrasonic generator and a permanent magnet. It is suitable for the separation and concentration of some or all components of liquids in water treatment, fruit juice concentration and other industries. Background technique [0002] Due to the characteristics of energy saving, high efficiency, simplicity and easy operation, membrane separation technology has attracted widespread attention. This technology is widely used in various fields such as food, medicine, chemical industry, and environmental protection. Although new membrane materials and membrane components have been developed continuously, the problem of membrane pollution has restricted the large-scale promotion of membrane technology. According to...

Claims

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Application Information

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IPC IPC(8): B01D65/02B01D65/08
Inventor 刘红何韵华王江辉
Owner BEIJING NORMAL UNIVERSITY
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