A kind of resin desorption liquid treatment method based on electrodialysis technology

A disposal method, electrodialysis technology, which is applied in the field of resin desorption liquid disposal based on electrodialysis technology, to achieve the effects of reducing production costs, high recovery salt income, and reducing the difficulty of subsequent treatment

Active Publication Date: 2019-03-01
NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the current resin desorption solution belongs to high-salt organic wastewater, and it is difficult to dispose of it efficiently and economically in the existing technology, the present invention provides a treatment method for resin desorption solution based on electrodialysis technology, which can effectively desorb The organic matter and salt in the liquid are separated, the salt content of the desalinated liquid is less than 1%, the difficulty of subsequent treatment is greatly reduced, the salt content of the concentrated liquid can reach 15%, and the COD Mn Less than 100mg / L, it can be used directly as a regeneration agent, realizing the resource utilization of desorption liquid and effectively saving the operating cost of the resin

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  • A kind of resin desorption liquid treatment method based on electrodialysis technology
  • A kind of resin desorption liquid treatment method based on electrodialysis technology

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Embodiment 1

[0033] A kind of resin desorption solution treatment method based on electrodialysis technology of the present embodiment comprises the following steps:

[0034] Step 1, add the stock solution of desorption solution to the desalination chamber 3 of the electrodialysis device: wherein the electrodialysis device includes a steady flow power supply, an electrode, a membrane stack 1, an electrode chamber 2, a desalination chamber 3 and a concentration chamber 4, the electrode chamber 2, the desalination chamber Both chamber 3 and concentration chamber 4 are provided with water inlet and water outlet, and the water inlet pipes of electrode chamber 2, desalination chamber 3 and concentration chamber 4 are provided with flow meters and pressure gauges. The function of the motor is to provide an electric field, including the anode and cathode, wherein the anode is a titanium-coated ruthenium electrode, and the cathode is a stainless steel plate; the function of the membrane stack 1 is ...

Embodiment 2

[0047] A kind of resin desorption solution treatment method based on electrodialysis technology in this embodiment is basically the same as that in Example 1, the difference is that this embodiment uses the concentrated solution with a salt content of 6.59% in Example 1 as the new receiving solution , empty the desalination chamber 3, add 1.2L desorption solution stock solution, other operations are the same as in Example 1, start the electrodialysis device to react for 32min, and stop the experiment when the conductivity in the concentration chamber 4 reaches 150mS / cm. It can be directly used as a regeneration agent, and its desorption capacity is 92% to 99% of that of fresh desorption liquid.

Embodiment 3

[0049] A kind of resin desorption solution treatment method based on electrodialysis technology of this embodiment is basically the same as embodiment 1, the difference is that in this embodiment, the membrane stack 1 includes 8 pairs of anion and yang membranes, and the total surface area of ​​the membrane stack 1 is 0.0672m 2 Add 1.5L desorption liquid in desalination chamber 3, add 0.3L tap water as receiving liquid in concentrating chamber 4, desorption liquid: receiving liquid=5:1; Electrode liquid adopts the sodium sulfate solution that mass concentration is 3%; The voltage of the dialysis device is 12V, and the voltage of the motor is 2V. After the electrodialysis device starts to react for 60 minutes, the experiment is stopped when the conductivity in the concentration chamber 4 reaches 170mS / cm, and the conductivity of the desalinated solution drops from 120.8mS / cm to 39.5mS / cm. cm, COD of dilute solution Mn is 4629mg / L, the salt content is 1.69%, and the COD of the ...

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Abstract

The invention discloses a resin desorption solution treatment method based on an electrodialysis technology, and belongs to the field of resin desorption solution treatment. The method comprises the following step: separating organic components from salt in a resin desorption solution by using an electrodialysis device. The salt content of a concentrated solution can be up to about 15 percent, and CODMn is less than 100mg / L, so that the concentrated solution can be directly taken as a regeneration agent to realize resource utilization of the desorption solution, and the running cost of resin is effectively lowered; the salt content of a desalinated solution is less than 1 percent, and the organic matter content can be lowered by coagulating sedimentation and ozone oxidization, so that the biodegradability is enhanced, and biological treatment can be performed. The resin desorption solution treatment method can be used for directly realizing recycling of the desorption solution, and the requirements on recycling and harmlessness of the resin desorption solution are met.

Description

technical field [0001] The present invention relates to the technical field of resin desorption liquid treatment, more specifically to a resin desorption liquid treatment method based on electrodialysis technology. Background technique [0002] With the continuous advancement of water pollution prevention and control, ion exchange technology has been widely used in the fields of advanced treatment of drinking water source water and reuse of reclaimed water. Compared with other technologies, ion exchange technology has the advantages of good purification effect, low operating cost and simple operation. [0003] While ion exchange resin can effectively remove organic matter in water, it also has good removal effect on toxic inorganic ions such as nitrate, sulfate and bromide. At the same time, it can effectively reduce water disinfection by-products and biological toxicity. However, in the desorption process of ion exchange resin after adsorption saturation, a small amount of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J49/50B01D61/42B01D61/54
CPCB01D61/422B01D61/54B01J49/50Y02A20/124
Inventor 曹勋施鹏丁新春陈利芳李爱民戴建军张晓李冬梅李寅森
Owner NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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