Method and device of high-efficient energy-saving hydropower molecular film

Abstract

A method and a device of a high-efficient energy-saving hydropower molecular film. A core part comprises a heat exchanger, a heating heat-insulation groove, a hot water pump, a reaction tank, an aeration system, a water circulating pump, a condenser, a water-producing tank, and a vacuum pump; the invention adopts hydropower molecular film technology; the effluent quality is excellent and stable, and has good removing effect on COD and chroma; the hydropower molecular film has a long service life, and high contamination resistance; the heat exchanger saves system energy consumption by 30%-50%; the aeration system increases the system efficiency by 10%-30%; the water production flux is higher than 10 L / m2.h; The invention is applicable to the treatment of reverse osmosis concentrated water, volatile organic waste water, heavy metal containing waste water, and industrial waste water, the recovery of useful substances, the desalination of seawater or brackish water, and the like, and is a high-efficient energy-saving water treatment method and device.

Description

technical field [0001] The invention relates to a method and a device for a hydroelectric molecular membrane, in particular to a high-efficiency, energy-saving membrane technology process and a device. Background technique [0002] The shortage of fresh water resources and the continuous deterioration of water environment quality are a difficult problem facing our country and the whole world. Membrane technology is also widely used in water treatment. In recent years, China's annual sewage discharge volume is about 40-50 billion m 3 , only about 15-25% is discharged after treatment. Due to the cross-flow of sewage everywhere, the major water systems in China have been polluted to varying degrees, and the water environment has seriously deteriorated. Desalination of seawater or brackish water is the main way to produce fresh water in coastal areas. The general RO treatment method has strict requirements on the influent, and the concentrated water produced has a high salt c...

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Problems solved by technology

[0004] Document 1: Wang Jun, Luan Zhaokun, Qu Dan, Zhang Shanshan, Wang Xiaojun, Wang Longlong. Research on Hydrophobic Membrane Distillation and Concentration Technology for RO Concentrated Water Reuse Treatment [J]. China Water Supply and Wastewater, 2007, 23(19): 1~5 , carried out research on the treatment of reverse osmosis concentrated water by hydrophobic membrane distillation, which has a good treatment effect on reverse osmosis concentrated water, but the membrane flux is only 8 L / m 2 About h

[0005] Document 2: Du Jun, Liu Zuohua, Tao Changyuan, etc. Experimental research on the separation of aqueous solutions containing Cr(VI) by vacuum membrane distillation [J]. Membrane Science and Technology, 2000, 20(3): 14~17, on vacuum membrane distillation Experimental study was carried out on the separation of Cr(VI) aqueous solution by this method. Under this process condition, the membrane has good separation performance, but the feed temperature is 60°C and the energy consumption is high.

[0006] Document 3: Invention patent 200810119250.1 An air-lift membrane distillation high-salt water treatment method, which studies the improvement of membrane flux by gas action, but cannot solve the current situation of membrane wetting, and does not consider the problems of improving efficiency and reducing energy consumption

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