Four major treatment methods for industrial cleaning wastewater reuse equipment-Ocpuritech-img

Four major treatment methods for industrial cleaning wastewater reuse equipment

by:Ocpuritech     2021-04-13
Industrial cleaning wastewater reuse treatment equipment four major author of the article: As the number of industrial waste water waste now increases the total recovery of general industrial cleaning waste water reuse equipment greater than 75%, waste water cleaning waste water recycling waste water treatment and reuse of industrial equipment by The system has realized recycling. The following briefly introduces the treatment method of industrial cleaning wastewater reuse equipment. 1. Air flotation method Air flotation method is to pass air into the water to generate tiny bubbles. Due to the adhesion between the bubbles and the fine suspended matter, a flotation body is formed. The floatation effect of the bubbles is used to float up to the water surface to form foam or scum. , So that the suspended matter in the water can be separated. According to the different ways of bubble generation, it can be divided into three types: inflatable air flotation, dissolved air flotation and electrolytic air flotation. The principle of the air flotation method used to treat electroplating wastewater: under acidic conditions, ferrous sulfate and hexavalent chromium undergo oxidation-reduction reactions, and then under alkaline conditions, flocs are produced, and the flocs are surfaced under the action of countless fine bubbles. , Make the water quality clear. 2. Ion exchange method The ion exchange method mainly uses the exchange ions in the ion exchange resin to exchange certain ions in the electroplating wastewater to remove them, so that the wastewater can be purified. The domestic use of ion exchange technology to treat electroplating wastewater has been experimentally studied since the 1960s. By the end of the 1970s, due to the urgent need to solve the environmental pollution problem, this technology has been greatly developed, and it has become the treatment and recycling of electroplating wastewater. One of the effective means for certain metals is also an important link to make the electroplating wastewater of certain plating species reach a closed circuit. However, the investment cost of the ion exchange method is very high, and the system design and operation management are relatively complicated. It is difficult for ordinary small and medium-sized enterprises to adapt. Often due to poor maintenance and management, the expected results cannot be achieved. Therefore, it has been promoted and applied. limits. 3. Electrolysis method The electrolysis method mainly causes the harmful substances in the wastewater to undergo oxidation and reduction reactions on the anode and the cathode through the electrolysis process, and convert them into harmless substances, or use the oxidation and reduction products of electrodes to generate the harmful substances in the wastewater. The chemical reaction produces water-insoluble precipitates, which are then separated and removed or metal is recovered through electrolysis. Electrolytic treatment of electroplating wastewater is generally used in small and medium-sized plants. Its main characteristics are that it does not need to add treatment chemicals, the process is simple, the operation is convenient, and it occupies less production space. At the same time, due to the high purity of the recovered metal, it is very useful for the recovery of precious metals. Good economic benefits. However, when the amount of treated water is large, the electrolysis method consumes more electricity and consumes a larger amount of iron plates. At the same time, the separated sludge is as difficult to dispose as the chemical treatment method, so it has been seldom used. 4. Extraction method The extraction method uses a solvent that is insoluble in water but can dissolve a certain substance in the water and is added to the wastewater, so that the solute is fully dissolved in the solvent, so as to separate and remove or recover a certain substance from the wastewater. The extraction process includes three main steps: mixing, separation and recovery. The environmental protection water treatment equipment company reminds you: the equipment is introduced here, and interested parties are welcome to pay attention to our website. The above will be updated at any time. If you need equipment, you can contact us!
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