Double-membrane wastewater treatment system based on fully-automatic ultrafiltration and reverse osmosis (RO) and a method

Abstract

The invention discloses a double-film wastewater treatment system based on fully-automatic ultrafiltration and reverse osmosis (RO), belonging to the technical field of sewage treatment. The double-film wastewater treatment system provided by the invention comprises a PLC control system, a raw liquid pool, a clear liquid storage pool, a concentrated liquid pool, a circulation cleaning device and acirculation device, wherein the circulation device comprises a first-stage circulation loop, a second-stage circulation loop, a third-stage circulation loop and a fourth-stage circulation loop whichare in sequential connection along the flow direction of a raw liquid; each circulation loop comprises a circulating water tank and a filter membrane device; the interior of the circulation cleaning device comprises a cleaning solution which realizes cleaning in an order of the fourth-stage circulation loop, the third-stage circulation loop, the second-stage circulation loop and the first-stage circulation loop. The invention discloses a treatment method at the same time. The treatment method comprises four steps. According to the invention, fully-automatic one-stage ultrafiltration and three-stage reverse osmosis (RO) are realized; and through pure physical treatment of a waste solution, the quality of treated water reaches the requirements of industrial reuse. According to the invention,no addition of chemical reagents is needed; produced water can be recycled; and the treatment method is easy to implement.

Description

technical field [0001] The invention relates to a waste water treatment system and method, and belongs to the technical field of sewage treatment, in particular to a double-membrane waste water treatment system and method based on fully automatic ultrafiltration+RO reverse osmosis. Background technique [0002] When the factory is processing mechanical parts, it needs to use a large amount of water-based cutting fluid, emulsion and water-based cleaning agent to lubricate and clean the workpiece, but this will generate a large amount of waste liquid, which contains industrial production materials lost with water , intermediate products, by-products and pollutants produced in the production process, the direct discharge of these pollutants will pollute the environment and violate the national environmental protection law. Therefore, many mechanical processing manufacturers use waste liquid treatment systems to treat waste liquid. [0003] However, the traditional wastewater t...

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Problems solved by technology

[0003] However, the traditional wastewater treatment methods mostly use electric heating distillation or steam heating distillation, which not only consumes a lot of energy, but also has harsh operating conditions, which can easily cause fires and endanger people’s production safety. The process is unstable, and because the biochemical treatment method requires a large amount of chemical agents, secondary pollution and a large amount of hazardous solid waste are generated

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