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A kind of waste sulfuric acid recovery and regeneration system and method

A sulfuric acid and waste technology, which is applied in waste sulfuric acid recycling system and waste sulfuric acid recycling field, can solve problems such as complex sulfuric acid components and affecting the removal efficiency of metal impurities in NF membranes, and achieve the goals of avoiding secondary pollution, low cost, and improving removal rate Effect

Active Publication Date: 2019-12-17
湖北弘本能源有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

However, due to the complex composition of waste sulfuric acid, which contains a large number of heavy metal ions and impurities in different valence states, it will affect the removal efficiency of metal impurities such as NF membranes.

Method used

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  • A kind of waste sulfuric acid recovery and regeneration system and method

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Embodiment Construction

[0036] Waste and old sulfuric acid recovery regeneration system of the present invention such as figure 1 As shown, including: multi-stage sedimentation tank 1, acid-resistant pump I2, plate and frame filter press equipment 3, acid storage tank 4, MF circulation pump 5, MF membrane equipment 6, UF circulation tank 7, bag filter I8, acid-resistant pump II9, UF membrane equipment 10, UF acid storage tank 11, acid distribution equipment I12, oxidation treatment tank 13, NF circulation tank 14, bag filter II15, NF circulation pump 16, acid-resistant NF membrane equipment 17, finished acid storage tank 18 , industrial sulfuric acid tank 19, acid distribution equipment II20, distillation equipment 21, settling equipment 22, heat exchanger 23 and reagent sulfuric acid storage tank 24;

[0037] The multi-stage sedimentation tank 1 is sequentially connected to the acid-resistant pump I2, the plate and frame filter press equipment 3, the acid storage tank 4, the MF circulating pump 5, a...

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Abstract

The invention provides a waste sulfuric acid recycling system and method. The waste sulfuric acid is treated by combining a membrane separation method and an oxidation treatment method, so that the removal rate of metal impurities by an NF membrane is increased, high-quality sulfuric acid which can be used as the electrolyte of the lead-acid storage battery is finally obtained, and the recycling of the sulfuric acid in the storage battery industry is realized. The system and the method are low in cost and high in efficiency, are less influenced by the external environment, and can realize theresource utilization of residual liquid and dirt in the system, avoid the generation of secondary pollution, and achieve the purpose of zero emission.

Description

technical field [0001] The invention belongs to the field of lead-acid storage battery recycling, and in particular relates to a waste sulfuric acid recycling system and method, which can be used for recycling waste sulfuric acid in lead-acid storage battery recycling plants. Background technique [0002] Lead-acid battery is a battery whose electrodes are mainly made of lead and its oxides, and the electrolyte is sulfuric acid solution. With the development of electronic equipment and automobile industries, the demand for lead-acid batteries will increase day by day, which will further led to a rapid increase in its waste. A large amount of electrolyte in used batteries is highly corrosive. If it is directly discharged into the environment, it will cause serious pollution to groundwater and soil. Some enterprises often use acid-base neutralization and coagulation precipitation to treat and discharge. Although this method is simple, it needs to consume a lot of alkali and c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M10/08C01B17/90
CPCY02E60/10Y02W30/84
Inventor 李培文张行祥孔庆波李萌王进刘长来
Owner 湖北弘本能源有限公司