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Flexible anti-scaling composite filter membrane and preparation method thereof

A composite filtration and anti-scaling technology, applied in chemical instruments and methods, ultrafiltration, membrane technology, etc., can solve the problems of poor adhesion, easy scaling on the membrane surface, low hygroscopicity, etc., and achieve excellent mechanical properties and rich surface Hydroxyl, the effect of improving the binding force

Inactive Publication Date: 2021-04-16
江苏羟源环能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the treatment process, the surface of the membrane is easy to scale, the cleaning times are frequent, the water production rate is only low, and high COD will cause membrane fouling, and there are also high requirements for suspended solids in the influent.
[0004] Basalt fiber is a new type of inorganic fiber obtained by melting, drawing and cooling natural basalt ore at high temperature. It has outstanding mechanical properties, high temperature resistance, high corrosion resistance and chemical stability, and low hygroscopicity. The surface of basalt fiber lacks active groups and has poor adhesion to other interfaces

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Graphene oxide modified basalt fiber mass fraction is 70%, plant nanocellulose 20%, lignin adhesive 5% and polyaspartic acid 5% are added into the aqueous solution as a mixture according to the proportion and stirred for 30min as the mother liquor to ensure its mixing uniform. Pour the formed mother liquor into a suction filtration device for ultrasonic dispersion treatment and vacuum filtration at the same time until a layer of flexible anti-scaling composite fiber film with uniform structure is formed on the surface of the filter membrane frame with a pore size of 10 mm, with a thickness of 3 mm. For the chloride ion content of high-salt sewage raw water of a chemical factory in Xinjiang, 121126mg / L, SS=368mg / L, SS=0.8mg / L after being treated by the filter membrane prepared in Example 1.

Embodiment 2

[0025] Graphene oxide modified basalt fiber mass fraction is 88%, plant nanocellulose 10%, lignin adhesive 1% and polyaspartic acid 1% are added into the aqueous solution as a mixture according to the proportion and stirred for 15min as mother liquor to ensure its mixing uniform. Pour the formed mother liquor into the suction filtration device to aerate and disperse it, and carry out vacuum filtration at the same time until a layer of flexible anti-scaling composite fiber with uniform structure is formed on the surface of the filter membrane frame with a pore size of 100mm, and the membrane thickness is 4.5mm . For the chloride ion content of the raw water of a chemical plant in Heilongjiang 1226.1mg / L, the total hardness (as CaCO 3 Total) 185mg / L, SS=84mg / L, SS=0.3mg / L after the filter membrane treatment by embodiment 2 preparation.

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Abstract

The invention provides a flexible anti-scaling composite filter membrane and a preparation method thereof, wherein a graphene oxide modified basalt fiber, plant nanocellulose, a lignin adhesive and a polyaspartic acid composite mother solution are subjected to vacuum filtration and the like to form a film sheet, and the film sheet is attached to the surface of a large-aperture filter membrane frame to prepare the filter membrane with strong pollution resistance. The filtering effect can reach the ultrafiltration level, and the flexibility, scale prevention, electrochemistry, high flux and film regeneration performance are also achieved, and meanwhile mother liquor can be recycled. According to the preparation method, the graphene oxide modified basalt fibers can be uniformly dispersed in water, so that respective excellent characteristics of the inorganic fibers and the organic fibers are fully exerted.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and functional filter membrane preparation, and in particular relates to a flexible anti-scaling composite filter membrane and a preparation method thereof. [0002] technical background [0003] High-salt wastewater refers to saline wastewater with a salt content exceeding 1% of the total salt content, including high-salt domestic wastewater and high-salt industrial wastewater, which mainly come from industrial production, domestic sewage, food processing plants, and pharmaceuticals that directly use seawater. Plants, chemical plants, etc., if they are discharged directly without treatment, they will inevitably cause great harm to aquatic organisms, drinking water, and industrial and agricultural production water. However, during the treatment process, the surface of the membrane is prone to fouling, frequent cleaning times, low water production rate, and high COD will cause membrane foul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02B01D61/14B01D67/00B01D69/02B01D69/12B01D71/02C02F1/44C02F5/00
Inventor 李森李璐高发强
Owner 江苏羟源环能科技有限公司
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