Biomimetic photocatalysis membrane separation assembly for purifying water

A technology for photocatalytic membrane and separation components, which is applied in semi-permeable membrane separation, membrane technology, chemical instruments and methods, etc., to achieve the effects of convenient assembly, good catalysis, separation and purification, and alleviating the phenomenon of concentration polarization

Inactive Publication Date: 2010-06-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical 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

[0024] The metal fine mesh screen membrane material or the organic membrane separation membrane material is made into a first-level leaf shape such as slender leaf, lotus leaf, flower-like leaf, etc., and the plastic supporting structure skeleton is wrapped inside, and the diaphragm is surrounded by the upper and lower sides. Seal, leave the outlet pipe position, and connect with the outlet pipe to form a secondary diaphragm structure.

[0025] Put the outlet pipes of several secondary membranes into a large water pipe, which can be called branch water pipe, and seal all around to form a three-stage membrane module structure; put the outlet pipe of the three-stage membrane module into a larger In the outlet pipe, which can be called the main water pipe, is sealed around to obtain a four-stage membrane module structure.

[0026] The photocatalyst is loaded on the membrane in advance, or it is loaded after assembly and will be over-activated.

[0027] In this way, a membrane module of...

Embodiment 2

[0030] Bionic catalytic separation membrane module

[0031] Use polyester filter cloth as the base membrane to make a bionic membrane. The sol-gel and PVA cross-linking heat treatment technology is used to prepare a surface coating with photocatalytic activity. Wrap the support frame inside with two pieces of film, and compact and seal around it like a leaf, leaving a separated fluid outlet pipe. Then, a plurality of the secondary membranes are assembled into a three-stage catalytic separation membrane module 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 and hydrogen peroxide (dye phthalocyanine) sensitized photocatalysis. The conditions for preparing the catalyst coating on the membrane surface can control the thickness and weight gain of the final composite membrane coating. The weight gain of the membrane is in the range of 1-20%. The coating thickness an...

Embodiment 3

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

[0035] The secondary structure of the biomimetic photocatalytic membranes with different numbers and shapes, a tertiary membrane module structure resembling branches, and a photocatalytic membrane separation module with a quaternary structure imitating plants and trees.

[0036] Several or more four-stage bionic photocatalytic separation membrane modules of different heights are placed in a pool, the upper end is submerged under water, and the lower end water outlet pipes are connected to each other to form a water outlet pipe network, which is integrated into the main water outlet pipe. It is exposed to light and photocatalysis to play the role of photocatalysis and membrane separation purification. The effluent can enter the water purification pool composed of the next-level bionic photocatalytic components. The membrane of the second-stage bionic catalytic membrane module can have a fine...

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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 technical field of photocatalytic materials and water treatment and purification. It involves using the principle of bionics to make a membrane containing a photocatalyst into a new catalytic separation composite membrane and a water purification membrane module with bionic characteristics of leaf, plant morphology and structure. Specifically, it involves using the morphology of leaves and plants as the design principle of the membrane module. The membrane module has a reasonable spatial layout. On the one hand, it has the characteristics of efficient use of light energy. On the other hand, it has the use of water flow and airflow disturbance to reduce pollutants in the water. The characteristics of deposition pollution on the film surface. The membrane separation function of the module is combined with the photocatalytic function, and it has a double water purification function. Background technique [0002] my country is a w...

Claims

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Application Information

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Patent Type & Authority Applications(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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