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Oil-water separation device and separation method based on PTFE hollow fiber membrane

A technology of oil-water separation device and fiber membrane, which is applied in the direction of separation method, grease/oily substance/floating matter removal device, liquid separation, etc. It can solve the problems of limited application range, long-term dispersion, and agglomeration easily caused by standing time

Active Publication Date: 2021-08-10
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Nanoparticles have the advantages of extremely high specific surface area and small size. As one of the inorganic nanoparticles, carbon nanotubes have a typical layered hollow structure and high surface ratio and mechanical strength. Although carbon nanotubes have excellent Physical and chemical properties, but due to its large aspect ratio and high surface energy, it cannot be dispersed in the solution for a long time, and it is easy to cause agglomeration after standing for too long, which greatly limits its application range

Method used

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  • Oil-water separation device and separation method based on PTFE hollow fiber membrane
  • Oil-water separation device and separation method based on PTFE hollow fiber membrane
  • Oil-water separation device and separation method based on PTFE hollow fiber membrane

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Effect test

Embodiment 1

[0061] As shown in the figure, an oil-water separation device based on PTFE hollow fiber membranes includes a filter housing 3 with an oil-water mixture inlet 1 and a water outlet 2, a filter chamber 8 is arranged inside, and a filter chamber connected to the filter chamber 8 is also included. The oil outlet chamber 5 for discharging the filtered oil, the oil-water mixture inlet 1 and the water outlet 2 are connected with the filter chamber 8, and the filter chamber 8 is provided with a filter chamber 8 divided into a filter treatment area 4 and a The orifice 6 of the storage area 9 for storing filtered water is provided with installation holes 7 for fixing the modified PTFE hollow fiber membrane filtration system on the two orifice plates 6, and the modified PTFE hollow fiber membrane filtration system is fixed on two Between the orifice plates 6; the inlet of the modified PTFE hollow fiber membrane filtration system is connected to the inlet of the oil-water mixture, the outl...

Embodiment 2

[0069] The same parts of this embodiment as in Embodiment 1 will not be repeated, and the difference is that at least one secondary oil-water separation device is further included, and the adjacent secondary oil-water separation devices are connected to each other. At this time, the connecting part of the adjacent secondary oil-water separation device can be used as the inlet of the oil-water mixture, and the oil-water mixture is separated and filtered for multiple times to achieve the effect of multiple separation and filtration.

[0070] Stretching is a key step in the preparation of PTFE hollow fiber membranes. During the stretching process, the morphology of PTFE hollow fiber membranes changes significantly. At lower stretching ratios, microcracks first form on the surface of PTFE hollow fiber membranes. With the increase of the multiple, the microcracks further expand to form continuous irregular areas. Kitamura et al. refer to the solid aggregates of particles as "nodes"...

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Abstract

The invention relates to the technical field of oil-water separation, in particular to an oil-water separation device based on a PTFE hollow fiber membrane and a separation method. The oil-water separation device comprises a filter shell with an oil-water mixed liquid inlet and a water outlet, a filter cavity is formed in the filter shell, and an oil outlet cavity communicated with the filter cavity is further included; pore plates for dividing the filtering cavity into a filtering treatment area and a storage area for storing filtered water are arranged in the filtering cavity, mounting holes for fixing the modified PTFE hollow fiber membrane filtering system are formed in the two pore plates, and the modified PTFE hollow fiber membrane filtering system is fixed between the two pore plates; and an inlet of the modified PTFE hollow fiber membrane filtration system is connected with an oil-water mixed liquid inlet, an outlet of the modified PTFE hollow fiber membrane filtration system is connected with the storage area, the oil-water separation device further comprises a liquid supply pump, an oil-water mixed liquid inlet control valve, a water outlet control valve, an oil outlet cavity control valve, a pressure gauge and a controller, the oil-water separation efficiency and the oil-water separation performance of the oil-water separation device are improved, and the oil-water separation device has good anti-pollution performance.

Description

technical field [0001] The invention relates to the technical field of oil-water separation, in particular to an oil-water separation device and a separation method based on PTFE hollow fiber membranes. Background technique [0002] Membrane separation is currently one of the most effective technologies for treating oily wastewater. At present, the materials applied to oil-water separation membranes mainly include polyacrylonitrile (PAN), polyethersulfone (PES), polyvinylidene fluoride (PVDF), etc. About PTFE Research on hollow fiber membranes in the field of oil-water separation is less. At the same time, the PTFE hollow fiber membrane prepared by the paste push-stretch-sintering method has the problem of uneven pore size, resulting in poor oil-water separation performance. Therefore, in order to improve the application of PTFE hollow fiber membranes in the field of oil-water separation, it is of great significance to explore the modification of PTFE hollow fiber membranes...

Claims

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Application Information

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IPC IPC(8): C02F1/40C02F1/44C02F1/28
CPCC02F1/40C02F1/44C02F1/283C02F2209/03C02F2209/005C02F2301/08Y02W10/10
Inventor 马建伟王健刘大庆李广鲁
Owner QINGDAO UNIV
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