Metal-containing waste acid liquid integral recovery device and method

A recovery device and waste acid technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, ion exchange water/sewage treatment, etc., can solve problems such as inability to recover metals and fail to realize resource recovery, and achieve guaranteed Effects of treatment efficiency and treatment life, improvement of metal recovery rate, and improvement of purity

Pending Publication Date: 2017-01-04
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems in the prior art that metal ion diffusion dialysis raffinate fails to achieve resource recovery and metal recovery, the present invention provides an integrated recovery device and method for metal-containing waste acid, which can separately recover metal-containing waste acid Acid and metal in the liquid, thus realizing the comprehensive recovery of industrial waste

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  • Metal-containing waste acid liquid integral recovery device and method

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Embodiment 1

[0044] The present invention is aimed at using a diffusion dialysis device to process metal-containing waste acid liquid to recover acid, but the resulting diffusion dialysis raffinate containing high concentration of metal ions fails to achieve resource recovery, and the acid concentration of metal-containing waste acid liquid is too high to be used In order to solve the problem of metal recovery by electrodeposition device, the present invention provides a method and device for combined treatment of waste acid containing metal ions by diffusion dialysis and electrodeposition, which can solve the defects of the above-mentioned treatment unit when used alone, and can recycle metal waste separately The acid and metals in the acid liquid are removed, thus realizing the comprehensive recovery of industrial waste.

[0045] Such as image 3 As shown, the integrated recovery device for metal-containing waste acid liquid is composed of a diffusion dialysis device 1 and an electrodepo...

Embodiment 2

[0057] The integrated recovery device for metal-containing waste acid liquid in this embodiment comprises a diffusion dialysis device 1 and an electrodeposition device 2, and the diffusion dialysis device 1 and the electrodeposition device 2 are connected through an intermediate buffer tank 3, realizing the two things we need. Both have effects and characteristics.

[0058] Such as figure 1 As shown, the diffusion dialysis device 1 is a plate and frame type, and the diffusion dialysis device 1 is composed of a membrane stack 16 composed of several layers of ion exchange membranes, and a front clamping plate 17 and a rear clamping plate fixed on both sides of the membrane stack 16 18 compositions. The membrane stack 16 is formed by one-time stacking of support plates, sealing gaskets, ion exchange membranes, sealing gaskets, flow channel separators, sealing gaskets, ion exchange membranes, sealing gaskets and support plates arranged in sequence. The ion-exchange membrane has ...

Embodiment 3

[0063] The integrated recovery device for metal-containing waste acid liquid in this embodiment comprises a diffusion dialysis device 1 and an electrodeposition device 2, and the diffusion dialysis device 1 and the electrodeposition device 2 are connected through an intermediate buffer tank 3, realizing the two things we need. Both have effects and characteristics.

[0064] Such as figure 1 As shown, the diffusion dialysis device 1 is a plate and frame type, and the diffusion dialysis device 1 is composed of a membrane stack 16 composed of several layers of ion exchange membranes, and a front clamping plate 17 and a rear clamping plate fixed on both sides of the membrane stack 16 18 compositions. The membrane stack 16 is formed by one-time stacking of support plates, sealing gaskets, ion exchange membranes, sealing gaskets, flow channel separators, sealing gaskets, ion exchange membranes, sealing gaskets and support plates arranged in sequence. The ion-exchange membrane has ...

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Abstract

The invention discloses a metal-containing waste acid liquid integral recovery device and method, and belongs to the field of waste recovery. Acid and metal ions in metal-ion-containing waste acid liquid are separated by a diffusion dialysis device; acid liquid after the metal ion separation can be used as recovered acid to be repeatedly and cyclically used; metal-ion-containing waste liquid after acid separation is reduced by an electro-deposition device to recover metal; finally, electro-deposition liquid is discharged into a wastewater treatment system. Two kinds of devices are combined; the recovery treatment problem of ignored metal ions in diffusion dialysis residual liquid in the prior art is solved; the acid concentration of the metal-ion-containing waste acid liquid is also greatly reduced; the applicable condition for recovering metal ions in the diffusion dialysis residual liquid by the electro-deposition device is created; the complementary characteristics of the diffusion dialysis and electro-deposition devices are used; the effective recovery of acid and metal in the metal-ion-containing waste acid liquid is realized.

Description

technical field [0001] The invention relates to the field of waste recycling, and more specifically relates to an integrated recycling device and method for metal-containing waste acid liquid. Background technique [0002] In titanium, steel, electroplating, rare earth and other industries, inorganic acids such as hydrochloric acid, sulfuric acid, and nitric acid are usually used to clean metal surfaces or use inorganic acids such as hydrochloric acid and sulfuric acid to regenerate resins, so there will be a large amount of waste acid containing metal ions produce. If these waste acids are discharged directly without proper treatment, it will not only pollute the environment, but also waste natural resources. At present, the methods for treating this kind of waste liquid include: chemical neutralization, acid-base wastewater neutralization, evaporation and concentration, etc., but there are problems such as high treatment cost, easy to produce secondary pollution, and fail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F9/00C02F1/42C02F1/469C02F1/66
Inventor 张炜铭王刚吕路潘丙才
Owner NANJING UNIV
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