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Biomimetic photocatalysis membrane separation assembly for purifying water

A photocatalytic membrane and separation component technology, applied in semi-permeable membrane separation, membrane technology, chemical instruments and methods, etc., to reduce the phenomenon of concentration polarization, flexible structure, and uniform light reception.

Inactive Publication Date: 2013-08-07
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The problem to be solved by the present invention is to better arrange the spatial layout of the photocatalytic membrane and the membrane module, on the one hand, make full and efficient use of light energy, on the other hand, improve the anti-pollution performance of the membrane module, and reduce pollution by using the disturbance of water flow and airflow

Method used

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  • Biomimetic photocatalysis membrane separation assembly for purifying water
  • Biomimetic photocatalysis membrane separation assembly for purifying water
  • Biomimetic photocatalysis membrane separation assembly for purifying water

Examples

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Effect test

Embodiment 1

[0025] The metal fine mesh membrane material or organic membrane separation membrane material is made into the shape of primary leaves such as slender strip leaves, lotus leaf leaves, flower-like leaves, etc., and the plastic support structure skeleton is wrapped inside, and the upper and lower sides of the membrane are wrapped. Seal, leave the position of the outlet pipe, and connect with the outlet pipe to form a secondary diaphragm structure.

[0026] Put the outlet pipes of several secondary diaphragms into a large water pipe that can be called a branch pipe, and seal the surroundings to form a three-stage membrane module structure; put the outlet pipes of the three-stage membrane modules into a larger The so-called photocatalyst is pre-loaded on the membrane, or loaded after assembly and overactivated.

[0027] In this way, the membrane assembly of the photocatalytic separation membrane with the bionic plant structure is obtained.

[0028]Connect the outlet pipes of seve...

Embodiment 2

[0030] Biomimetic Catalytic Separation Membrane Module

[0031] Using polyester filter cloth as the base membrane, a bionic membrane is made. The surface coating with photocatalytic activity was prepared by sol-gel and PVA cross-linking heat treatment technology. Wrap the supporting frame inside with two pieces of film, and press and seal the four sides like a blade, leaving one separated fluid outlet pipe. Afterwards, a plurality of the secondary membranes are assembled into a three-stage catalytic separation membrane assembly imitating the shape of a plant. The catalyst is composed of titanium dioxide doped series, etc., through various mechanisms such as ultraviolet / visible light catalysis, hydrogen peroxide (dye phthalocyanine) sensitized photocatalysis, etc. The conditions for preparing the catalyst coating on the surface of the membrane can control the thickness and weight gain of the final composite membrane coating. The weight gain range of the membrane is 1-20%. ho...

Embodiment 3

[0034] Cascade biomimetic photocatalytic separation membrane module water purification system

[0035] The above-mentioned secondary structure of bionic photocatalytic membranes with different numbers and shapes, the tertiary membrane module structure similar to branches, and the photocatalytic membrane separation module of quaternary structure imitating plants and trees.

[0036] Put several or more four-stage biomimetic photocatalytic separation membrane modules of different heights in the pool, the upper end is submerged underwater, and the outlet pipes at the lower end are connected to each other to form an outlet pipe network, which is collected into the main outlet pipe. Illumination and photocatalysis When irradiated with 254nm ultraviolet germicidal light and the average light intensity of leaves can reach 366 microwatts / square centimeter, when 1000ml aqueous solution containing 10mg / g2,4 dichlorophenol passes through for 2 hours, the total area is 300cm2, containing T...

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Abstract

The invention discloses a biomimetic photocatalysis membrane separation assembly for purifying water, belonging to the technical field of membrane separation, photocatalysis materials and water treatment. The invention aims at simulating plant leaf blades and plant morphology, preparing a photocatalysis separation membrane, enabling a membrane assembly to reasonably utilize space, have flexible structure and to be disturbed easily by a water flow and an airflow, reducing precipitation of pollutants on a membrane surface, fully utilizing light and improving the light use rate. The biomimetic photocatalysis membrane separation assembly is characterized in that the biomimetic membrane piece is prepared by utilizing the fractal characteristic of the plant leaf blade, and a biomimetic membraneassembly is assembled by utilizing the branch structures of trees and a biomimetic principle to assembly the bionic membrane and improve light use rate of the assembly; and the flexible structure of the membrane assembly is beneficial to reducing pollutant precipitation by using a disturbance effect of the water flow and the airflow so as to prevent the inactivation of a catalyst. The invention has the advantage of providing a preparation method of the novel biomimetic photocatalysis membrane separation assembly and a method for separating the pollutants in water by utilizing the high-efficiency photocatalysis membrane of the membrane assembly. The invention can be widely applied to photocatalysis to remove pollutants and purify water.

Description

technical field [0001] The invention belongs to the fields of photocatalytic materials and water treatment and purification. It involves the use of bionic principles to make membranes containing photocatalysts into new catalytic separation composite membranes and water purification membrane components with bionic characteristics of leaves, plant shapes and structures. Specifically, it involves using the shape of the leaves and plants as the design principle of the membrane module, so that the membrane module has a reasonable spatial layout. On the one hand, it has the characteristics of efficient use of light energy, and on the other hand, it can use the disturbance of water flow to reduce the pollutants in the water. Membrane surface deposition fouling characteristics. The membrane separation function of this module is combined with the photocatalytic function, which has a double water purification function. Background technique [0002] my country is a country short of w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/10B01D69/02C02F1/30C02F1/42
Inventor 柳丽芬赵雅静杨凤林于心瑞
Owner DALIAN UNIV OF TECH
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