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Multi-stage filtration and extraction process

An extraction process and stage filtration technology, applied in the fields of textile, metallurgy, papermaking, electroplating, electronics, pharmaceuticals, petrochemicals, and can solve the problems of difficult biochemistry, inability to extract useful components for recycling, and complex components.

Inactive Publication Date: 2012-02-08
JIANGSU QINGYI ENVIRONMENTAL PROTECTION EQUIPCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The wastewater discharged during the production of chemical products, after being aggregated and mixed, has high concentration, complex components, and biochemical refractory degradation. The existing membrane purification efficiency is not high, the membrane is easily polluted, and the useful components cannot be extracted for recycling.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0007] For example, there are different sewages in each process of textile dyeing and finishing, and the present invention treats the sewage directly produced by each process respectively. The processing steps are as follows:

[0008] 1. Filter the sewage through a hollow fiber membrane to obtain permeate and concentrate respectively.

[0009] Drain the permeate.

[0010] 2. The concentrated solution is extracted by ion exchange method, ionization crystallization method, reverse osmosis method or tower extraction method to obtain filtrate and waste liquid respectively.

[0011] The filtrate is a useful substance and can be recycled.

[0012] 3. The waste liquid is subjected to biochemical treatment and purification treatment.

[0013] In the above treatment processes, targeted hollow fiber membranes and extraction devices can be designed according to the specific molecular structure and size of the sewage in each process and the requirements of the recycled materials in the...

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Abstract

The invention relates to a multi-stage filtration and extraction process and belongs to the technical field of sewage treatment. The multi-stage filtration and extraction process comprises the following steps of: extracting concentrated solution obtained by filtration by adopting an ion exchange method, an ionization crystallization method, a reverse osmosis method or a tower type extraction method after sewage is filtered by a hollow fiber ultra-filtration membrane, respectively obtaining a useful matter and waste liquid and carrying out biochemical treatment and purification treatment to the waste liquid. In the multi-stage filtration and extraction process, the hollow fiber ultra-filtration membrane and a purifying device are adopted to treat sewage in each process in the production process step by step, and ion exchange or ionization crystallization and other specific proper extraction methods are respectively adopted for the concentrated solution produced step by step; and an extracted useful matter can be circularly reutilized.

Description

technical field [0001] The invention relates to technical fields such as petrochemical industry, metallurgy, electronics, electroplating, textile, papermaking, pharmacy, etc., especially the sewage treatment process technology in the above-mentioned fields. Background technique [0002] The wastewater discharged during the production of chemical products, after being aggregated and mixed, has high concentration, complex components, and biochemical refractory degradation. The existing membrane purification efficiency is not high, the membrane is easily polluted, and the useful components cannot be extracted for recycling. Contents of the invention [0003] The purpose of the present invention is to propose a multi-stage filtration and extraction process that can improve purification efficiency, be recyclable, and reduce sewage treatment costs. [0004] The technical scheme of the present invention is: after the sewage is filtered through a hollow fiber membrane, the concent...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/44C02F1/42C02F1/26
Inventor 谈家彬夏四清孟虎
Owner JIANGSU QINGYI ENVIRONMENTAL PROTECTION EQUIPCO