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  • Battery industry ultra-pure water equipment zl-dc001

    Source: battery industry ultra-pure water equipment Author: Bluestar Time: 2015-09-19 Views: Times

    Ultra pure water equipment for battery industry

    Ultra pure water equipment for battery industry

    Device parameters:
    Name: Ultra pure water equipment for battery industry
    Model: zl-dc001
    Operating pressure: 0.3-0.6 (Mpa)
    Water output: 0.25-100T / H
    Dimensions: 150-1500 (cm)
    Voltage: 380 (V)
    Water quality: 0.1US
    Power: 1000 (w)
    Conductivity: less than 10US
    Desalination rate: 99.5 (%)
    Single machine output: 0.25-100 (/ h)
    Water inlet diameter: 50 (mm)
    Overview:
    Ultra-pure water for the battery industry includes pure water for battery production, pure water for lithium battery production, pure water for solar cell production, and pure water for battery grids. The configuration of the electrolyte in the battery has very strict requirements for pure water. Usually, the conductivity of water is required to be above 0.1us / cm (resistance value is 10 megaohm). The disadvantage of this process is that the resin is often regenerated after a period of use. With the continuous maturation of membrane separation technology, reverse osmosis filtration technology is often used, or ultra-pure water is produced by first-stage reverse osmosis followed by ion exchange mixed bed (or electro-deionized EDI) process.

    Ultra pure water equipment for battery industry

    Ultra pure water equipment for battery industry

    Battery classification:
    1. Primary battery: Also called primary battery, refers to the battery that cannot be recovered by simple charging methods after the battery is discharged, such as zinc—manganese dioxide dry battery ZN-MnO2, lithium manganese battery, zinc air battery , Primary zinc-silver batteries, etc.
    2. Storage battery: also known as secondary battery, refers to the battery that can be used to recover the active material after charging and continue to use the battery, and this charge and discharge can reach dozens to thousands of cycles: for example: nickel Cadmium battery (Ni-Cd), nickel-metal hydride battery (Ni-MH), lead-acid battery (Pb-H2SO4)
    3. Fuel cell: It is also called continuous battery, which means that the active substances participating in the reaction are continuously input into the battery from the outside of the battery, and the battery continuously works to provide electricity: such as: hydrogen-oxygen fuel cells, phosphate fuel cells, etc.
    4. Reserve battery: refers to the fact that the battery's positive and negative electrodes do not come into direct contact with the electrolyte during storage. Electrolyte should be injected before use or other methods should be used to contact the positive and negative electrodes. After that, the battery enters the state to be discharged. I call this process as "Activation" is also called activation battery, such as magnesium battery, thermal battery and so on.
    5. According to the electrolyte: acid battery, alkaline battery, neutral battery, organic electrolyte battery, non-aqueous inorganic electrolyte battery, solid electrolyte battery 6. According to the characteristics of the battery: high capacity battery, sealed battery, high power battery, free Maintenance batteries, explosion-proof batteries, etc. 7. According to positive and negative electrode materials: zinc-manganese battery series, nickel-cadmium nickel-hydrogen series, lead-acid series, lithium battery series, etc.
    Four common methods for preparing battery water:
    Distilled water: Although the equipment is cheap, volatile impurities cannot be removed, and ions and plastic molding materials may precipitate and cause secondary pollution.
    Deionized water: It is a traditional process used to make pure water for a long time. But deionized water can easily cause bacteria to multiply.
    Reverse osmosis water: Reverse osmosis water overcomes many shortcomings of distilled water and deionized water. The use of reverse osmosis technology can effectively remove most impurities such as organic matter.
    Ultra-pure water: The standard is 18.2 MΩ-cm. The process of preparing ultrapure water is usually made by reverse osmosis plus ion exchange mixed bed or reverse osmosis plus electric deionization ( EDI ).

    Ultra pure water equipment for battery industry

    Ultra pure water equipment for battery industry

    Process flow:
    1. Adopt ion exchange method, the process is as follows:
    Raw water → Raw water pressure pump → Multi-media filterActivated carbon filter → Water softener → Precision filter → Male resin filter bed → Anion resin filter bed → Yin and Yang resin mixed bed → Microporous filter → Water point 2. Two-stage The method of reverse osmosis is as follows:
    Raw water → raw water pressure pump → multi-media filter → activated carbon filter → water softener → precision filter → first stage reverse osmosis → pH adjustment → intermediate water tank → second stage reverse osmosis (the surface of the reverse osmosis membrane is positively charged) → Purified water tank → pure water pump → microporous filter → water point 3. The EDI method is adopted, and the process is as follows:
    Raw water → raw water pressure pump → multi-media filter → activated carbon filter → water softener → precision filter → primary reverse osmosis machine → intermediate water tank → intermediate water pump → EDI system → microporous filter → water point process comparison:
    At present, the processes for preparing ultrapure water for the chemical industry are basically the above three, and the rest of the process flow is derived from different combinations and combinations based on the above three basic process flows. Their advantages and disadvantages are listed below:
    The first type uses ion exchange resin, which has the advantages of less initial investment and less space, but the disadvantage is that it requires frequent ion regeneration, consumes a large amount of acid and alkali, and has a certain destructive effect on the environment.
    The second type uses two-stage reverse osmosis equipment, which is characterized by higher initial investment times than the ion exchange resin method, but does not require resin regeneration. The disadvantage is that the relevant membrane originals need to be cleaned or replaced regularly. The water quality is not too high, and most of them can only be about 1us / cm. Therefore, when the quality is not higher, the first-stage reverse osmosis is often used and then the mixed bed is used. (Yin and Yang double bed) Check.
    The third type uses reverse osmosis as a pretreatment and is equipped with an electric deionization (EDI) device. This is currently the most economical and environmentally friendly ultrapure water preparation process for preparing ultrapure water. It can be continuously used without regeneration by acid and alkali. Preparation of ultra-pure water is not destructive to the environment. The disadvantage is that the initial investment is too expensive compared to the above two methods.
    National standard:
    The electrolyte is configured by concentrated sulfuric acid and ultra-pure water treated by reverse osmosis equipment. It must comply with the national standard GB4554-84 for battery-specific sulfuric acid. It is formulated with pure water that meets the requirements to have a density of 1.22 (+ -0.01g / cm3. 20oC) electrolyte.

    More processes: battery pure water treatment process

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