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Piezoelectric ceramic filter membrane and device using same

A piezoelectric ceramic and ceramic membrane technology, applied in the field of functional ceramic membrane separation, can solve the problems of low general applicability, silver poisoning, and single anti-pollution performance of ceramic membranes.

Active Publication Date: 2017-04-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent application CN104128101A proposes to modify the ceramic membrane separation layer by doping an appropriate amount of silver to prepare a separation membrane material with a metal-ceramic composite structure. Due to water treatment, it has certain antibacterial properties, especially when the matrix is ​​TiO 2 At the same time, it also has certain photocatalytic and self-cleaning functions, so as to achieve anti-pollution performance, but silver is relatively expensive, and improper use can cause argyria, and the anti-pollution performance of the ceramic membrane is single, the realization conditions are harsh, and the self-cleaning efficiency is low. , the general applicability is not high

Method used

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  • Piezoelectric ceramic filter membrane and device using same
  • Piezoelectric ceramic filter membrane and device using same
  • Piezoelectric ceramic filter membrane and device using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: The piezoelectric ceramic filter membrane is obtained by coating a mixture of aluminum-modified zinc oxide conductive material and polystyrene on the surface of a conventional commercially available ceramic membrane and sintering at 1200°C to obtain a piezoelectric filter membrane with a piezoelectric layer. Electroceramic filter membrane; when coating and preparing, the mixture of doped aluminum-modified zinc oxide conductive material and polystyrene is the ratio of doped aluminum-modified zinc oxide conductive material and polystyrene in a mass ratio of 5:1 Prepared by mixing, the coating thickness is 20 μm, and the aluminum-doped zinc oxide conductive material is prepared by referring to the method in Yue Renliang's "Liquid Phase Flame Combustion Synthesis and Conductivity Research of Aluminum Doped Nano Zinc Oxide".

[0035] like figure 1 As shown, the device using the piezoelectric ceramic filter membrane includes a fluid delivery pipe 1, a pulsation dam...

Embodiment 2

[0040] Example 2: The piezoelectric ceramic filter membrane is a microfiltration piezoelectric ceramic with a piezoelectric layer obtained by coating a mixture of barium titanate and polyethylene glycol on the surface of a conventional commercially available microfiltration ceramic membrane and sintering at 1000 ° C. Filter membrane; during coating preparation, the mixture of barium titanate and polyethylene glycol is prepared by mixing barium titanate and polyethylene glycol at a mass ratio of 4:1, and the coating thickness is 50 μm.

[0041] like image 3 As shown, the device using the piezoelectric ceramic filter membrane includes a fluid delivery pipe 1, a pulsation damper 2, a back pressure valve 3, a flow meter 4, a separation box 5, a piezoelectric ceramic filter membrane 6, a power supply 8, and an ultrasonic device 17; The fluid delivery pipe 1 communicates with the fluid inlet 7 on the separation box 5, and the piezoelectric ceramic filter membrane 6 is fixed in the ...

Embodiment 3

[0045] Example 3: Referring to the method of Example 2, a conventional commercially available microfiltration ceramic membrane is coated with a mixture of lead zirconate titanate and polyethylene oxide and sintered at 1150°C. During coating preparation, zirconate titanate The mixture of lead and polyethylene oxide is prepared by mixing lead zirconate titanate and polyethylene oxide at a mass ratio of 4.5:1, and the coating thickness is 80 μm to obtain a piezoelectric ceramic filter with a piezoelectric layer. membrane.

[0046] use as image 3 The shown device filters and separates dust-laden waste gas (the average particle size of dust is 8.9 μm, and the density is 10mg / m³). The operating conditions are consistent, and it runs continuously for 8 hours. The interception rate of dust is as high as 96%. Next, the permeation flux of the flat piezoelectric ceramic microfiltration membrane is from 2370L m -2 h -1 · bar -1 down to 2230 L·m -2 h -1 · bar -1 , without the coope...

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Abstract

The invention discloses a piezoelectric ceramic filter membrane and a device using the same. The piezoelectric ceramic filter membrane with a piezoelectric layer is prepared by applying a mixture of a piezoelectric material and an additive on the surface of a ceramic membrane and then conducting sintering; or the piezoelectric ceramic filter membrane containing the piezoelectric material and the additive is prepared by adding the piezoelectric material and the additive in the existing ceramic membrane preparation technology process. The membrane is applied in the fluid separation process, particles and charged bodies are forced to be far away from the ceramic filter membrane through the piezoelectric effect and the inverse piezoelectric effect of the piezoelectric material under the synergistic effect of an external power supply or ultrasonic waves, then the effects of preventing filtering pores and channels of the ceramic filter membrane from being blocked, achieving a self-cleaning function and inhibiting ceramic filter membrane contamination are achieved, and the service life of the ceramic membrane is significantly prolonged. The prepared piezoelectric ceramic filter membrane is high in anti-contamination capability and contaminant retention rate and wide in application range; the piezoelectric ceramic filter membrane running device is reasonable in design and easy and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of separation of functional ceramic filter membranes, and in particular relates to a piezoelectric ceramic filter membrane and a device for use. Background technique [0002] Ceramic membrane separation technology is a very advanced separation and concentration technology in recent years. Ceramic membranes are widely used in various fields such as environmental protection, biomedicine, chemical manufacturing and energy protection. The ceramic membrane has many advantages such as acid and alkali corrosion resistance, high temperature resistance, stable structure, uniform pore size distribution, good chemical stability, high separation efficiency, and high mechanical strength. It has an irreplaceable position in the field of liquid and gas separation and concentration. [0003] The ceramic membrane is a layered composite membrane composed of two or more layers including a support layer, an intermediate transi...

Claims

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Application Information

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IPC IPC(8): B01D63/00B01D65/08B01D67/00B01D35/06C04B41/87
CPCB01D35/06B01D63/00B01D65/08B01D67/0088C04B41/5041C04B41/5049C04B41/87B01D2321/22B01D2321/2075B01D2325/26
Inventor 瞿广飞杜彩东解若松宁平袁瑞王诗博
Owner KUNMING UNIV OF SCI & TECH
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