Method for recycling pure acid from metallic ion containing waste acid and regenerating alkali

A metal ion, acid recovery technology, applied in the direction of chlorine/hydrogen chloride purification, sulfur trioxide/sulfuric acid, chlorine/hydrogen chloride, etc., can solve the problems of alkali consumption, waste of water resources, difficulty in recycling, etc., and achieve production cost and energy consumption. Low, no secondary pollution, high acid recovery effect

Active Publication Date: 2009-01-14
HARBIN COSLIGHT STORAGE BATTERY
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

But there are the following problems: 1. in this method, the raffinate after diffusion dialysis is used as the supply liquid (dilute chamber) of the bipolar membrane electrodialysis cell, due to the initial H 2 SO 4 The concentration is still high, the energy consumption of the electrodialysis cell and the H transferred (recovered) 2 SO 4 Proportional to the amount
③After bipolar membrane electrodialysis, a certain volume of electrodialysis raffinate s

Method used

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  • Method for recycling pure acid from metallic ion containing waste acid and regenerating alkali
  • Method for recycling pure acid from metallic ion containing waste acid and regenerating alkali
  • Method for recycling pure acid from metallic ion containing waste acid and regenerating alkali

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specific Embodiment approach 1

[0011] Specific implementation mode one: the step of regeneration of pure acid from waste acid containing metal ions in this embodiment is as follows (see figure 1 ): (a) first enter the waste acid 11 into the first-stage diffusion dialysis tank I, so that the volume ratio of the waste acid to the collected liquid in the first-stage acid recovery chamber (which can be the secondary recovery acid 14) is 1:0.5~1: 3.0, the flow rate of the waste acid liquid 11 is 0.2-0.6L / h, and the flow rate of the collected liquid in the acid recovery chamber is 0.1-1.8L / h; (b) the first-level raffinate 13 after step a enters the second-level diffusion In the dialysis tank II, the volume ratio of the primary raffinate 13 to the collected liquid in the secondary acid recovery chamber (the mixed solution of tap water 12 and regenerated acid 20) is 1:0.5 to 1:3.0, and the flow rate of the primary raffinate 13 is 0.2 ~0.6L / h, the flow rate of the collected liquid in the secondary acid recovery cham...

specific Embodiment approach 2

[0012] Embodiment 2: In this embodiment, in step d, the form of bipolar membrane electrodialysis adopts three compartments (cathode membrane-bipolar membrane-cation membrane alternately arranged). Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Specific embodiment three: the embodiment recycles the battery factory into sulfuric acid waste liquid, which is composed of sulfuric acid concentration of 12%, ferrous ion concentration of 15 mg / L, and lead ion concentration of 3 mg / L. The flow rate of the waste sulfuric acid liquid 11 is 0.42L / h; the flow rate of the collected liquid 14 entering the acid recovery chamber of the primary diffusion dialysis tank is 0.84L / h; the electrodialysis is performed under the condition of a voltage of 10V for 3h. Other steps are the same as in the first embodiment. The experimental results are shown in Table 1 and Table 2.

[0014] Table 1 Effects of acid recovery and metal ion retention in two-stage diffusion dialysis

[0015]

[0016] * The data in ( ) represents the total sulfuric acid recovery rate R of two-stage diffusion dialysis, and its calculation formula is:

[0017] R=[(the sulfuric acid content in the recovery acid 15+the sulfuric acid content in the recovery aci...

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Abstract

Disclosed is a method which recovers pure acid from the waste acid contains metallic ion and reproduces alkaline, and belongs to the environmental protection field. The process steps include that: (a) the waste acid solution with the acid concentration 10%-40% is processed with the first level diffusion dialysis; (b) the residue after the step a is processed with the second level diffusion dialysis; the volume ratio of the first level (or the second level) waste acid (or the first level diffusion residue) in the first level (or the second level) diffusion dialysis groove residue and the acid recovery chamber collected solution is 1:0.5-1:3.0; the flow rate of the waste acid (or the first level diffusion residue) is enabled to be 0.2-0.6L/h; the flow rate of the acid recovery chamber collected solution is 0.1-1.8L/h; (c) the second residue after the step b is processed with neutralization and deposition; (d) the neutralized filtrate after the solid-liquid separation-filtration is fed to the three compartment electrodialysis groove middle chamber, the electrodialysis is processed for 1-3h under the voltage 5-15V to obtain the reproduction acid and reproduction alkaline. The method which recovers pure acid from the waste acid contains metallic ion and reproduces alkaline has the advantages of high acid recovery rate, low production cost and energy-consumption, less film pollution, saving water, reducing discharge and no secondary pollution.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a method for regenerating pure acid from waste acid containing metal ions by using a combined process of two-stage diffusion dialysis-neutralization precipitation-three-compartment electrodialysis. Background technique [0002] Waste acids containing metal ions are produced in various manufacturing processes and processing engineering. Such as sulfuric acid waste liquid from non-ferrous metal ore or metal processing, hydrochloric acid waste liquid from extraction or acid leaching process, hydrofluoric acid waste liquid from lead processing, chromium-containing waste liquid from electroplating process, etc. Especially in the pickling process, aluminum anodizing process, aluminum titanium etching process, metal refining process and battery production process, etc. will produce waste acid solution with high acid content. [0003] The treatment and utilization methods of waste ...

Claims

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Application Information

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IPC IPC(8): C01B7/07C01B17/90
Inventor 汪群慧马宁邢凯张健程桂石
Owner HARBIN COSLIGHT STORAGE BATTERY
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