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Carbon fiber filter, regeneration method thereof and carbon fiber filtering device

A technology of carbon fiber filter and carbon fiber filament, which is applied in the field of filtration, can solve the problems of reduced membrane flux, reduced membrane service life, reduced membrane area, etc., achieves strong anti-pollution ability, realizes in-situ regeneration, and prevents permanent clogging effects

Active Publication Date: 2022-04-08
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Filtration technology is widely used in the field of water treatment. The main mechanism of membrane separation technology is size exclusion (such as microfiltration). Pollutants are intercepted in membrane pores and membrane surfaces, which eventually leads to membrane fouling and reduced membrane flux, which leads to high energy consumption and more Undesirable consequences such as long downtime and reduction of membrane area
Therefore, related technologies are needed to solve this problem. For example, the patent No. 201510778873.X applied by Beijing Jinze Environmental Energy Technology Research Co., Ltd. discloses an online sub-unit for ultrafiltration / microfiltration membrane chemical cleaning system, but the patent The chemical cleaning reagents used are limited to food grade to ensure that no harmful cleaning sewage is produced; the patent No. 201810255408.1 applied by Huzhou Kefilter Membrane Technology Co., Ltd. announced that through the bubble generator and spike device, the bubble explosion effect is used to achieve micro However, the structure of the cleaning device is complicated, and the vent pipe is prone to blockage, etc., which cannot completely solve the deep pollution of the membrane; the patent number 202110171638.1 applied by Jinan University announced the combination The membrane cleaning technology used, the cleaning process is relatively cumbersome, and the generation of nano-bubbles also depends on the bubble generator, which is more prone to clogging
[0004] To sum up, the structure of conventional in-situ physical cleaning is relatively complex, and chemical cleaning has an irreversible effect on the membrane structure, which reduces the service life of the membrane and thus increases the cost of membrane separation technology.

Method used

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  • Carbon fiber filter, regeneration method thereof and carbon fiber filtering device
  • Carbon fiber filter, regeneration method thereof and carbon fiber filtering device
  • Carbon fiber filter, regeneration method thereof and carbon fiber filtering device

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 1 Shown is the structure of a carbon fiber filter, including a central filter body 9 and carbon fiber filaments 11 wound around the central filter body 9, the central filter body 9 is hollow and provided with a water outlet 12, the central filter body 9 The surface of the surface is provided with at least one groove 10, and a plurality of through holes are arranged in the region of the groove 10, and the through holes and the water outlet 12 are all communicated with the hollow cavity of the central filter body 9, the The carbon fiber filaments 11 are wound in the groove 10 with a constant force to form a filter layer. The carbon fiber filament 11 is wound in the groove 10 by a constant force. The groove 10 is an inverted triangular groove 10 with an included angle of 10-160°. The pores formed by winding the carbon fiber filaments 11 gradually increase from the bottom of the inverted triangular groove 10 outwards. The carbon fiber filament 11 is wound o...

Embodiment 2

[0052] In this example, the carbon fiber filaments are first modified by acid leaching, and the method is as follows: modify the carbon fiber filaments by dipping acid modification, place the carbon fiber filaments in an acetone solution, and condense and reflux them in a water bath at 60°C 48h, and then washed several times with ultrapure water, this process can remove impurities and organic polymer layer on the surface of the fiber. Then soak the degummed carbon fiber in 45wt.% HNO 3 solution, heated at 60°C for 2 hours, and then rinsed with ultrapure water until the pH did not change. The modification method can improve the hydrophilicity of the carbon fiber and is suitable for oil-water separation of oily wastewater.

[0053] The carbon fiber filter prepared by using the modified carbon fiber filament 11 is used to filter the oily wastewater, which is mainly a mixture of diesel oil, SDBS and water. The filtration process is as follows: the modified carbon fiber filament ...

Embodiment 3

[0056] Such as Figure 8 As shown, it is a schematic diagram of the structure of the fiber filter device. From the outside to the inside, the main structure is the outer pool body 1, the upper cover plate 2, the rubber pad 3, the fixing bolt 4, the air inlet 5, the water inlet 6, the water outlet of the pool body 7, Support plate 8, central filter body 9, inverted triangular groove 10 and carbon fiber filament 11. The pretreated PAN carbon fiber filament 11 is evenly wound in the inverted triangular groove 10 of the central filter body 9 with a constant force of 10-200N (adopting 25N in this embodiment), and the central filter body 9 is wrapped with a hose. The water outlet is connected with the pool body water outlet 7, the central filter body 9 is supported on the support plate 8, and the upper cover plate 2 and the rubber pad 3 are fixed on the outer pool body 1 with fixing bolts 4. The air inlet 5 and the water inlet 6 are installed on the upper cover plate 2, the air inl...

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Abstract

The invention relates to the technical field of filtration, in particular to a carbon fiber filter, a regeneration method thereof and a carbon fiber filtering device.The carbon fiber filter comprises a center filter body and carbon fiber filaments wound around the center filter body, the center filter body is hollow and provided with a water outlet, at least one groove is formed in the surface of the center filter body, and the carbon fiber filaments are arranged in the groove. A plurality of through holes are formed in the groove area, the through holes and the water outlet are communicated with the hollow inner cavity of the central filter body, and the carbon fiber filaments are wound in the groove through constant force to form a filter layer. According to the fiber filter disclosed by the invention, high-strength carbon fiber yarns are wound in the grooves by using constant force, so that fibers in the grooves are directionally and tightly gathered and form the filtering holes, and the aperture of the filtering layer formed along with the thickening of the winding layer is gradually reduced along the water flow direction, so that the effect of deep filtering is achieved; and the adjustability of the aperture of the filter layer is realized by changing the constant force.

Description

technical field [0001] The invention relates to the technical field of filtration, in particular to a carbon fiber filter, its regeneration method and a carbon fiber filter device. Background technique [0002] Microfiltration technology is a membrane technology driven by low pressure, the operating pressure is usually 0.35MPa, and the initial flux is 10 -4 ~10 -2 m / s, it can intercept suspended colloids and particles with a particle size ranging from 0.1 to 1 μm. Due to the porosity and large internal surface area of ​​the microfiltration membrane, microfiltration technology is widely used in the separation of bacteria, yeast and mammalian cells; purification and sterilization of gas and virus-containing solutions; purification in food processing; oil-water separation; Water and wastewater treatment and other fields. In water and wastewater treatment, microfiltration technology is usually combined with coagulation, adsorption and other pre-treatment technologies to achie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D24/46
Inventor 王旭王桧许涛谢一敏毛旭辉胡将军
Owner WUHAN UNIV