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A post-production processing method and system for a hollow fiber membrane

A fiber membrane and hollow technology, which is applied in the field of post-treatment methods and systems for the preparation of hollow fiber membranes, can solve the problems of difficult waste liquid treatment, difficult control of VOC emissions, and large amount of extraction agent, and achieve high equipment sealing and safety. Good application prospects and the effect of reducing raw material consumption

Active Publication Date: 2022-03-15
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects existing in the prior art, this application provides a post-production processing method and system for hollow fiber membranes, which solves the difficult control of VOC emissions, large amount of extractant and difficult disposal of waste liquid in the post-processing process of hollow fiber membranes in the prior art. And other issues

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  • A post-production processing method and system for a hollow fiber membrane

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] The hollow fiber membrane production post-treatment system according to the present invention comprises the following devices:

[0033] The extraction device comprises an extraction tank, the extraction tank is provided with a heating component, and the extraction tank is provided with a porous silk storage tank for placing membrane filaments; the membrane filaments placed in the silk storage tank are mixed with the extraction agent in the extraction tank contacting, the extractant extracts the membrane filaments to obtain the extracted membrane filaments and an extract containing a diluent and an extractant;

[0034] The buffer device includes a settling tank, the extract is precipitated in the settling tank, part of the diluent is precipitated in the form of solid, and the solid-liquid is separated to obtain a solid-phase diluent and a...

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Abstract

The invention relates to a post-production processing method for hollow fiber membranes, comprising: S1. Sending hollow fiber membranes containing a diluent into an extraction device, and extracting the membranes with an extractant to obtain extracted membranes and An extract containing an extractant and a diluent; the extract is sent to a buffer device; S2. In the buffer device, part of the diluent in the extract is precipitated, and then solid-liquid separation is performed to obtain a solid-phase diluent and the residual liquid, the residual liquid is sent to the concentration device; S3. In the concentration device, the extractant in the residual liquid is separated to obtain recovered liquid extractant and concentrated liquid. The invention also relates to a post-processing system for hollow fiber membrane production. According to the method and system provided by the invention, the operation safety is significantly improved, the production cost and environmental risk are reduced, the production technology of the hollow fiber membrane is significantly affected, and the application prospect is good.

Description

technical field [0001] The invention belongs to the field of material processing, and relates to a post-processing method and system for hollow fiber membrane preparation. Background technique [0002] As one of the most commonly used separation membranes, hollow fiber membranes are gradually expanding in industrial sewage treatment, municipal sewage treatment, seawater desalination, food and pharmaceutical industries. The membrane product market is also increasing year by year. Many companies at home and abroad have produced various hollow fiber separation membrane materials. At present, the main preparation methods of hollow fiber membranes are melt spinning-stretching (MSCS), immersion precipitation (NIPS) and thermally induced phase separation (TIPS). The stretching method generally uses an extruder to extrude the resin melt and draw it at high speed, and then undergoes cold stretching, hot stretching and heat setting. The raw material is single, and the production pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/02B01D65/00B01D69/08
CPCB01D65/00B01D65/02B01D69/08
Inventor 奚振宇侯秀华任鹏飞杨永强张新妙
Owner CHINA PETROLEUM & CHEM CORP
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