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Diffusion and electrodialysis integrated treatment method and device for acid waste liquid containing metallic ion

A technology of diffusion dialysis and acid waste liquid, which is applied in the field of integrated treatment devices of diffusion dialysis and electrodialysis, which can solve the unseen problems of integration or coupling between a spiral-coil diffusion dialysis device and an electrodialysis device, so as to reduce consumption, The effect of prolonging the operating time

Active Publication Date: 2012-07-18
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no relevant reports on the integration or coupling of the spiral-coil diffusion dialysis device and the electrodialysis device.

Method used

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  • Diffusion and electrodialysis integrated treatment method and device for acid waste liquid containing metallic ion
  • Diffusion and electrodialysis integrated treatment method and device for acid waste liquid containing metallic ion
  • Diffusion and electrodialysis integrated treatment method and device for acid waste liquid containing metallic ion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Using a treatment device integrated with a spiral-wound diffusion dialysis device and an electrodialysis device to treat simulated foil-forming wastewater

[0027] figure 1 It is a schematic diagram of the spiral-coil diffusion dialysis device used in this example. The spiral-wound diffusion dialysis device 1 is assembled according to the method described in Chinese Patent Application No. 201010144042.4: a piece of DF provided by Shandong Tianwei Membrane Technology Co., Ltd. is sandwiched between two side-by-side central tubes 35A and 35B. The -120 anion exchange membrane and the flow channel spacers on both sides of the membrane are rolled together in the same direction around the central tubes 35A and 35B. The edges are coated with adhesive for sealing, until the end of the ion exchange membrane forms two radially symmetrical flow channel openings in the tangential direction on the outer edge of the cylinder, and the side flow tubes 36 and 37 are bonded a...

Embodiment 2

[0039] Example 2: Using a treatment device integrated with a plate-and-frame diffusion dialysis device and an electrodialysis device and its treatment of simulated steel wastewater

[0040] Figure 4It is a schematic diagram of the diffusion dialysis operation performed by the existing plate-and-frame diffusion dialysis device used in this example. The plate-and-frame diffusion dialysis device 1' is a membrane stack 40 formed by sequentially stacking a support plate, a sealing gasket, an ion exchange membrane, a sealing gasket, a flow channel partition, a sealing gasket, an ion exchange membrane, a sealing gasket and a supporting plate. , formed by fixing the front clamping plate 38 and the rear clamping plate 39. The DF-120 anion exchange membrane provided by Shandong Tianwei Membrane Technology Co., Ltd. is used in the device. The total effective membrane area of ​​the device is about 21cm 2 . The inlet 43 of one of the two flow channels of the device is connected to the ...

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Abstract

The invention discloses a diffusion dialysis and electrodialysis integrated treatment method and device for acid waste liquid containing metallic ion. The diffusion dialysis and electrodialysis integrated treatment device is characterized in that a diffusion dialysis device adopts a plate and frame type diffusion dialysis device or a spiral reeling type diffusion dialysis device; a buffer tank isadopted to connect the diffusion dialysis device and an electrodialysis device to form an integrated device for treating the acid waste liquid containing metallic ion; the concentration and dilution capability of the electrodialysis device is used for diluting the dialysate in the diffusion dialysis process, and then the diluted dialysate serves as receptor liquid in the diffusion dialysis process, so that the solution on the receptor liquid side of the diffusion dialysis device is reused and water consumption amount in the diffusion dialysis process is greatly reduced; and meanwhile, the operation time of the electrodialysis process can be prolonged, the concentration of recovered acid can achieve the direct use requirement, fresh acid liquid does not need to be added into recovered acidafter the continuous diffusion dialysis operation, and the acid obtained by recovery is fully utilized.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a device and method for integrated treatment of diffusion dialysis and electrodialysis for acidic waste liquid containing metal ions. Background technique [0002] According to China's "Pollution Prevention and Control Technology" magazine (2008, 21:59-61), in industries such as titanium materials, steel, electroplating, wet copper smelting, and rare earths, inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid, and hydrofluoric acid are usually used. Acid is used to clean metal surfaces or dissolve ores, so a large amount of acidic waste liquid containing metal ions will be generated. If these acid waste liquids are discharged directly without proper treatment, it will not only pollute the environment, but also waste natural resources. Although there are some methods for treating this type of waste liquid at present, including: drug neut...

Claims

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Application Information

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IPC IPC(8): C02F9/06
Inventor 徐铜文张旭李传润王晓林汪耀明
Owner UNIV OF SCI & TECH OF CHINA
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