Method and device of ion exchange and concentration in solution

A solution and ion technology, applied in ion exchange water/sewage treatment, general water supply saving, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of no additional driving force, insufficient driving force, increased resistance, etc.

Inactive Publication Date: 2017-02-15
秦才东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the ion exchange and concentration method and device in the solution of the present invention is: there is no additional driving force in the existing diffusion dialysis and Donnan diffusion dialysis, and as the diffusion proceeds, the driving force decreases continuously, and the resistance Constantly increasing, there is a problem of insufficient driving force

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This example provides a new method for seawater desalination, acid-base and salt-containing sewage treatment, or as a primary treatment method for subsequent reverse osmosis, electrodialysis, etc., and demonstrates ion exchange and concentration methods in any solution. Diffusion dialysis or Donnan dialysis. This new method combines the advantages of both Donnan diffusion dialysis and ion exchange methods, and also overcomes the problem of low driving force of Donnan dialysis, which can open up new application fields and can also be applied to fields where ion exchange resins are currently used. include:

[0039] Step 1, in the experiment, it is preferable that weakly acidic or neutral cationic membrane is the diffusion dialysis membrane in the Donnan dialysis device, and this membrane is clamped between two nylon parts that the opening diameter is 3 centimeters and butt joint, the membrane The effective area is a 3 cm diameter circle, and the opening depth of each nyl...

Embodiment 2

[0050] In order to test the decomposition effect of the ammonium salt, the leakage caused by it, and the leakage parameters of the membrane itself [Experiments found that due to the characteristics of the cationic membrane material, when clamped with nylon parts, it is easy to cause membrane deformation at the contact boundary, or Leakage problems often occur during the experiment], city tap water [200ml, the measured salinity value is 0.1ppt] containing trace electrolytes is used as the solution to be treated, that is, the corresponding exchange solution for diffusion dialysis; the strong acidic cationic membrane used The thickness is about 0.28 mm.

[0051] When the driving solution is a saturated ammonium chloride solution, after half an hour of diffusion dialysis, it is measured that ammonia gas is released from the ammonium chloride solution and tap water, and the pH test paper is colored, and the pH value of the tap water increases from about 7 to About 7.5. In addition,...

Embodiment 3

[0059]This embodiment is an example of a seawater or wastewater desalination method. Soak 50g of commercially available strong-acid sodium-type cationic resin with saturated ammonium chloride solution for 6 hours, that is, the regeneration process, and soak 50g of strong-basic chloride-type anion resin with saturated ammonium bicarbonate solution for 6 hours. After the resin is taken out, it is fully washed with water, and the water is removed by centrifugation. First, pour 150ml of simulated seawater into the cationic resin treated with ammonium chloride. After 1 hour of exchange reaction, pour seawater into the previously treated anion resin. After 1 hour of exchange reaction, complete an exchange cycle , and then poured into the cationic resin, after 3 cycles, the measured salinity decreased from 35 per thousand to 29 per thousand, accompanied by the precipitation of alkaline ammonia gas. When using weakly acidic cation resin and weakly basic anion resin, there is a simila...

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Abstract

The invention relates to a method and a device for ion exchange and concentration in a solution. According to the invention, with a combination of anionic and cationic membranes or with combined applications of anionic and cationic resin, ion transfer channels are provided, and material separation and ion exchange reactions in the solution are realized. Under the effects of different driving solutions, seawater desalination, wastewater resource utilization and wastewater safety disposal are realized. The method can be widely applied in sewage treatments; ion concentration, deacidification, dealkalization, desalination and brine desalination processes in various industrial production processes; production of potassium salt, sodium salt and alkali; and conversions between acid, alkali and salt.

Description

technical field [0001] The invention relates to a method and device for exchanging and concentrating ions in a solution, in particular to a combined application method utilizing anion membranes and cation membranes, anion resins, and cation resins, and belongs to the technical field of ion separation. Background technique [0002] In water treatment, including seawater desalination, chemical production, chemical separation and chemical reaction, light industry and food, atomic energy and other industrial fields, it often involves the exchange or conversion of various anions and cations in water, or separation and removal or concentration recovery, and organic matter and Separation, dehydration, purification and concentration of different kinds of substances such as water, acid, alkali and salt, and double decomposition reactions. Because of the development of the chemical industry, water pollution and the scarcity of fresh water have affected the sustainable development of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42C02F1/52
CPCY02A20/131
Inventor 秦才东
Owner 秦才东
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