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Processing system of aqueous solution containing concentrating easy-to-scaling ions and processing method thereof

A technology of treatment system and treatment method, applied in multi-stage water treatment, water/sewage treatment, flotation water/sewage treatment, etc. Effect

Active Publication Date: 2016-04-20
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the defects of traditional anti-scaling methods, in order to solve the problem of very low fouling and concentration ratio in the process of concentration and filtration such as reverse osmosis, electrodialysis and distillation / evaporation, the present invention proposes an ion recombination technology

Method used

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  • Processing system of aqueous solution containing concentrating easy-to-scaling ions and processing method thereof
  • Processing system of aqueous solution containing concentrating easy-to-scaling ions and processing method thereof
  • Processing system of aqueous solution containing concentrating easy-to-scaling ions and processing method thereof

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Embodiment 1

[0065] Such as image 3 As shown, the present embodiment provides the following aqueous solution treatment system:

[0066] An aqueous solution treatment system, the system includes a water storage tank 1, a pretreatment device 27, a nanofiltration device, an analysis permeable tank 11, an analysis and retention tank 12, and an electrodialysis device, and the electrodialysis device includes an electrode chamber tank 10, a heavy Drainage tank one 13, heavy drainage tank two 14, electrodialyzer and DC power supply 9.

[0067] The electrodialyzer comprises an anode plate 17, a cathode plate 18, a cation exchange membrane 19, an anion exchange membrane 20, a separator, an analysis water retention chamber 23, an analysis analysis permeable chamber 21, a heavy drainage chamber 22, a heavy drainage chamber 2 24, Anode chamber 25 and cathode chamber 26 .

[0068] Wherein, the outlet of the analysis permeable water of the nanofilter 6 is connected with the inlet of the analysis perme...

Embodiment 2

[0074] Embodiment 2: a kind of aqueous solution treatment system

[0075] Except that the nanofiltration membrane in the nanofilter 6 is a hollow fiber membrane, the electrodialyzer includes 1 set of membranes, each set of membranes includes 2 cation exchange membranes 19 and 2 anion exchange membranes 20, the electrodialyzer The current density during operation is 1000A / m 2 , except that the electrodialyzer is bipolar membrane electrodialysis, other devices are the same as in Example 1.

Embodiment 3

[0076] Embodiment 3: a kind of aqueous solution treatment system

[0077] Except that the nanofiltration membrane in the nanofilter 6 is a tubular membrane, the electrodialyzer includes 5 sets of membranes, each set of membranes includes 2 cation exchange membranes 19 and 2 anion exchange membranes 20, and the electrodialyzer operates When the current density is 0.1A / m 2 , except that the electrodialyzer is inverted electrodialysis, other devices are the same as in Example 1.

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Abstract

The invention provides a processing system of an aqueous solution and its processing method. The system comprises water storage tank, a pretreatment device, a nanofiltration device, a separation permeable water tank, a separation retention water tank and an electrodialysis device. The electrodialysis device comprises a pole compartment tank, a rearrangement water tank, an electrodialyzer and a DC power supply. The electrodialyzer comprises an anode plate, a cathode plate, a cation exchange membrane, an anion exchange membrane, a separator plate, a separation retention water compartment, a separation permeable water compartment, a rearrangement water tank, an anode compartment and a cathode compartment. The invention brings forward an ion separation and rearrangement technology. By the rearrangement effect of electrodialysis, cation in separation permeable water obtained after nanofiltration and anion in the separation retention water are combined into a new salt, and anion in separation permeable water obtained after nanofiltration and cation in separation retention water are combined into another salt. Thus, various ions in the easy-to-scaling solution are separated and combined into salt with high solubility. Concentration multiple of salt is raised, and scaling is prevented. Life of the membrane and equipment is greatly prolonged, and water recovery rate and concentration of concentrated water are greatly enhanced.

Description

technical field [0001] The invention belongs to the field of water treatment, and relates to an aqueous solution treatment system and a treatment method thereof, in particular to an aqueous solution treatment system and a treatment method thereof containing concentrated ions easily scaled. Background technique [0002] In the fields of seawater desalination, brackish water treatment, advanced treatment of sewage and industrial wastewater, and power plant circulating water treatment, there are generally high amounts of dissolved solids in water, and divalent ions (representatively divalent ions such as calcium and magnesium) cations, divalent anions such as sulfate and carbonate) and some organic macromolecular ions are also high in concentration. Since a considerable part of divalent salts and organic macromolecular salts have low solubility in water, they are easy to scale when concentrated, which seriously hinders the improvement of water recovery in the above-mentioned fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F1/001C02F1/24C02F1/36C02F1/442C02F1/444C02F1/4693C02F1/52C02F9/00C02F2101/10C02F2101/101C02F2101/12C02F2301/08
Inventor 张杨杜娟何思远张宇菲
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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