Energy-saving and pollution-resisting water treatment system provided with RO (reverse osmosis) membranes and application of water treatment system

Abstract

The invention provides an energy-saving and pollution-resisting water treatment system provided with RO (reverse osmosis) membranes. The energy-saving and pollution-resisting water treatment system comprises a raw water tank, a main raw water pipeline, a main produced water pipeline, a main concentrate water pipeline and a plurality of RO membrane elements connected in parallel, wherein produced water of the RO membrane elements converges at the main produced water pipeline, concentrate water of the RO membrane elements converges at the main concentrate water pipeline, a system water inlet valve 1 is arranged on each branch raw mater pipeline, and a concentrate water reflux valve 2 and a concentrate water control valve 3 are arranged on each branch concentrate water pipeline; and the water treatment system further comprises compressed air pipelines converged with the branch raw water pipelines. The water treatment system adopts a mode of total parallel connection of single membrane elements, and the operation energy consumption is lower; and the operation mode of intermittent water production and intermittent air-water joint flushing is adopted, and the recovery rate of the system can reach 80%-90%.

Description

【Technical field】 [0001] The invention relates to water treatment equipment, in particular to an energy-saving and anti-pollution reverse osmosis membrane water treatment system, and the application of the water treatment system. 【Background technique】 [0002] Reverse osmosis (RO) is a membrane separation technology. The raw water passes through the reverse osmosis membrane under the action of high pressure, and the solvent in the water diffuses from high concentration to low concentration to achieve the purpose of separation, purification and concentration, so as to remove bacteria and viruses in the water. , colloids, organic matter and soluble salts. This method has the characteristics of simple operation, high degree of automation, and stable effluent quality, but it also has disadvantages such as high operating pressure and easy fouling of the membrane. [0003] The traditional reverse osmosis water treatment system basically adopts a multi-stage series design, and th...

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Problems solved by technology

In addition, there is a certain pressure loss when raw water passes through each membrane element, and the concentration of water entering the next membrane element will gradually increase, resulting in a sequential decrease in the water production of the membranes in the same section of the system

Therefore, the traditional reverse osmosis water treatment system requires a relatively large inlet pressure to overcome the corresponding pressure loss generated by each membrane element.

[0004] In addition, for a series of multi-stage systems, since the concentration of water entering the next membrane gradually increases, the water production of the membranes in the same section of the system will decrease in turn.

The water concentration and water pressure of each membrane are different, which will aggravate the degree of pollution of the membrane elements

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