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Apparatus for treating iron-containing acid waste water generated from power battery disassembly, and method thereof

A technology for acidic wastewater and power batteries, applied in chemical instruments and methods, multi-stage water/sewage treatment, oxidized water/sewage treatment, etc. The effect of convenience and easy availability of raw materials

Active Publication Date: 2013-06-26
GUANGDONG BRUNP RECYCLING TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these iron-containing acidic wastewater and harmful gases are not handled properly, there will be potential threats of secondary pollution and serious environmental risks.

Method used

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  • Apparatus for treating iron-containing acid waste water generated from power battery disassembly, and method thereof
  • Apparatus for treating iron-containing acid waste water generated from power battery disassembly, and method thereof
  • Apparatus for treating iron-containing acid waste water generated from power battery disassembly, and method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] A device for treating iron-containing acidic wastewater produced by dismantling a power battery, comprising an iron-containing acidic wastewater pool 1, a stainless steel reaction kettle 14, a high-concentration acid pool 13, and an anti-corrosion chlorination tower 15 connected in sequence through pipelines;

[0036] The stainless steel reaction kettle 14 is provided with a screen 4, and iron filings 5 ​​are accumulated on the screen 4; the top of the stainless steel reaction kettle 14 is provided with a spray head 10 connected with the iron-containing acidic waste water pool 1, and the ferrous acidic waste water passes through the spray head 10 Spray into the kettle; the wall of the kettle below the screen 4 is provided with a chlorine gas inlet 3, and the chlorine gas rises in the kettle through the sieve hole on the screen 4, and it contacts with the iron-containing acidic waste water and iron filings sprayed downwards, three A series of reactions take place; the bot...

Embodiment 2

[0044] A method for treating iron-containing acidic wastewater produced by dismantling a power battery based on the above-mentioned device, comprising the following steps:

[0045] (1) Feed acidic waste water containing iron into the stainless steel reactor, and feed chlorine gas at the same time; the feed rate of chlorine gas is 10m 3 / s, the feed rate of iron-containing acidic wastewater is 1.5m 3 / s. The composition of iron-containing acidic wastewater is shown in Table 1.

[0046] Table 1 Composition of iron-containing acidic wastewater

[0047]

[0048] In the above process, reactions 1, 2 and 3 occurred in the stainless steel reactor; during the spraying process, due to insufficient oxidation, the reaction was not complete enough, and the effluent of the stainless steel reactor contained FeCl 3 There is also a small amount of FeCl 2 , forming a high-concentration acid solution. Can calculate the FeCl that contains 24.332% (mass percentage) in the high-concentrati...

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Abstract

The present invention discloses an apparatus for treating iron-containing acid waste water generated from power battery disassembly, and a method thereof. The apparatus comprises an iron-containing acid waste water tank, a stainless steel reaction kettle, a high concentration acid liquor tank and a corrosion resistant chlorination tower, wherein the iron-containing acid waste water tank, the stainless steel reaction kettle, the high concentration acid liquor tank and the corrosion resistant chlorination tower are sequentially connected. Screen meshes are arranged inside the stainless steel reaction kettle and the corrosion resistant chlorination tower. Iron scraps are accumulated on the screen meshes. The reaction kettle wall below the screen mesh is provided with a chlorine gas inlet. During the waste water treatment process, the iron-containing acid waste water is introduced in the stainless steel reaction kettle, and the chlorine gas is introduced; the iron-containing acid waste water reacts with the chlorine gas and the iron scraps to form the high concentration acid liquor; the resulting high concentration acid liquor is introduced in the corrosion resistant chlorination tower, and the chlorine gas is introduced; when the black powder on the surface of the solution disappear, the ferric chloride is collected on the ferric chloride outlet. According to the present invention, the process of the method of the present invention is simple, the operation process is convenient, only the supplies of the iron scraps and the liquid chlorine are required after the ferric chloride is recovered, the raw materials are easy to obtain, the waste materials generated from the power battery disassembly can be adopted so as to avoid the pollution to the surrounding environment.

Description

technical field [0001] The invention belongs to the technical field of industrial waste treatment, and in particular relates to a device and method for treating iron-containing acidic waste water generated during the dismantling process of a power battery. Background technique [0002] The pollution of waste batteries and its treatment have become one of the most widely concerned environmental protection focuses in society. At present, most electric bicycles use 3 or 4 lead-acid batteries (a set), and the weight of each set of batteries is about 12-16 kg. According to the average service life of each battery of 1.5 years, more than 400,000 tons of electric bicycle batteries are scrapped in my country every year. The large number is really worrying. [0003] Power batteries produced by electric vehicles are hazardous waste. The battery will not affect the environment during normal use, but if the internal heavy metal salts, acid and alkali leak out and enter the soil or wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C01G49/10C02F1/76
Inventor 李长东陈清后余海军
Owner GUANGDONG BRUNP RECYCLING TECH CO LTD