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Porous hollow tubular composite membrane and preparation method and application thereof

A composite membrane, tubular technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of rising fluid resistance and falling flow rate of fixed bed, and achieve large adsorption capacity and compact structure. , the effect of fast adsorption rate

Active Publication Date: 2016-02-24
SHANGHAI LVQIANG NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the decrease in the particle size of the adsorbent will cause the fluid resistance of the fixed bed to increase and the flow rate to decrease

Method used

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  • Porous hollow tubular composite membrane and preparation method and application thereof
  • Porous hollow tubular composite membrane and preparation method and application thereof
  • Porous hollow tubular composite membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Porous Hollow Tubular Composite Membrane Device for Removing Fluoride from Tap Water

[0054] Preparation of porous hollow tubular composite membrane 1: dissolving chitosan in 1 wt% acetic acid aqueous solution to prepare 2L of chitosan solution with a concentration of 0.5%. Add 400g of adsorbent particle powder to it and configure it into a suspension; the adsorbent particle is mixed with 4A molecular sieve, calcium phosphate, γ-alumina particles, and quick-release powder in a mass ratio of 1:1:0.8:0.2. The particle size of each adsorbent particle is 40 microns-50 microns. A porous hollow alumina ceramic tube is selected as the porous hollow tubular carrier 11, the outer diameter of the ceramic tube is 10 mm, the wall thickness is 1 mm, and the length is 150 mm. Block one end of the porous hollow tubular carrier 11, and connect the other end to a vacuum filtration device, immerse the entire porous hollow tubular carrier 11 in the suspension, and filter with suction to...

Embodiment 2

[0081] Hollow Porous Composite Membrane Device for Removing Fluorine from Concentrated Water Discharged from Reverse Osmosis Process

[0082] Preparation of the porous hollow tubular composite membrane 1: dissolving chitosan in 1 wt% acetic acid aqueous solution to prepare 2L of 1% chitosan solution. Add 400g of adsorbent particle powder into it and configure it into a suspension; the adsorbent particles are composed of 4A molecular sieve, calcium phosphate, γ-alumina particles, and hollow nano-alumina fibers (outer diameter is about 500nm, inner diameter is 300nm, and length is 20 microns) , Pseudoboehmite is mixed according to the mass ratio of 1:1:0.4:0.4:0.2, except for the hollow nano-alumina fiber, the particle size of the other four adsorbents is 40 microns-50 microns. The porous hollow alumina fiber is selected as the porous hollow tubular carrier 11, the outer diameter of the alumina fiber is 5 mm, the wall thickness is 1 mm, and the length is 100 mm. With reference ...

Embodiment 3

[0098] Hollow Porous Composite Membrane Device for Removing Fluoride from Groundwater

[0099] Preparation of Porous Hollow Tubular Composite Membrane 1: Refer to Example 2 for the preparation process of Porous Hollow Tubular Composite Membrane 1.

[0100] Assembly of the shell-and-tube adsorption device: the above-mentioned seven porous hollow tubular composite membranes 1, cylinder 4 with an inner diameter of 80mm, sealing gasket 2, support frame 3, head 5, etc. are composed of a shell-and-tube adsorption device. Two shell-and-tube adsorption devices are used in parallel, that is, the water inlet and outlet of one shell-and-tube adsorption device are respectively connected with the water inlet and water outlet of the other shell-and-tube adsorption device. In order to increase the processing capacity of the whole system.

[0101] Defluorination of groundwater: The concentration of fluoride ions in the ground was measured to be 3.8mg / L. The groundwater passed through the po...

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Abstract

The invention relates to a porous hollow tubular composite membrane and a preparation method and application thereof. The composite membrane is formed by combining a porous hollow tubular carrier and an adsorption particle gathering layer which is arranged on the outer surface of the porous hollow tubular carrier in a wrapping mode, the adsorption particle gathering layer is a porous-membrane-shaped adsorption particle gathering layer, and the thickness of the adsorption particle gathering layer is 5-50 mm; in the preparation process, the porous hollow tubular carrier is immersed in a chitosan solution containing adsorption particle powder, the adsorption particle powder is arranged on the outer surface of the porous hollow tubular carrier in a wrapping mode, then the porous hollow tubular carrier is suspended and dried, and the porous hollow tubular composite membrane can be obtained. In the application process, the porous hollow tubular composite membrane is assembled into a tube-shell type adsorption device and used for conducting defluorination on drinking water. Compared with the prior art, the porous hollow tubular composite membrane is high in adsorption rate, large in adsorption volume, large in sectional area of a work bed layer when being used for defluorination and capable of being applied to a household minitype defluorination device for drinking water.

Description

technical field [0001] The invention belongs to the technical field of water purification, and relates to a porous hollow tubular composite membrane and its preparation method and application, in particular to a porous hollow tubular composite membrane, its preparation method and its application in defluorination of drinking water. Background technique [0002] Fluorine is one of the trace chemical elements widely distributed in the natural environment and closely related to human health. Every tissue of the human body contains trace amounts of fluorine, and 80-90% of the fluorine is concentrated in teeth and bones, which is an important element in the formation of bones and teeth. The human body absorbs an appropriate amount of fluoride to prevent dental caries and promote calcium metabolism in bones. However, when the human body takes in too much fluoride, it will cause calcium and phosphorus metabolism disorders in the human body, resulting in the disease of "dental fluo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30C02F1/28C02F1/58C02F101/14
Inventor 余金鹏张春秀王鹏飞徐华胜何秋平
Owner SHANGHAI LVQIANG NEW MATERIALS CO LTD
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