Three-stage hydrodynamic cavitation treatment system for organic wastewater
A treatment system and technology for organic wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, water pollutants, etc. The effect of degradation rate
Active Publication Date: 2019-05-31
SHANDONG UNIV
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Problems solved by technology
[0006] However, the hydraulic cavitation device used in the above technology basically adopts the existing Venturi tube, cavitation nozzle and orifice structure, which has the problems of small processing capacity and low efficiency.
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[0027] The organic waste water three-stage hydraulic cavitation treatment system of the present invention, such as figure 1 As shown, it includes a precipitant tank 1 , a coagulation tank 2 , a sedimentation tank 4 , a rotating hydraulic cavitation 7 , a cavitation jet generator 9 and an ultrasonic cavitation 11 , which are connected in sequence. A valve 3 is provided on the connecting pipeline between the sedimentation tank 1 and the coagulation tank 2, and a water pump 5 is provided on the connecting pipeline between the sedimentation tank 4 and the rotary hydraulic cavitation 7, and the rotary hydraulic cavitation 7 is also connected with the fen. Dayton reagent cell 12 is connected. The Fenton reagent in the Fenton reagent cell 12 is H 2 O 2 and FeSO 4 mixture, specifically H with a concentration of 200 mg / L 2 O 2 Solution and FeSO with a concentration of 20mg / L 4 The solution is a 2:1 mixture by volume.
[0028] The precipitant is stored in the precipitant tank 1. ...
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Abstract
Disclosed is a three-stage hydrodynamic cavitation treatment system for organic wastewater. The system comprises a precipitant tank, a coagulating tank, a precipitation tank, a rotating hydrodynamic cavitation device, a cavitation jet flow generator and an ultrasonic cavitation device which are connected in sequence; a water pump is arranged on a connection pipeline between the precipitation tankand the rotating hydrodynamic cavitation device, the rotating hydrodynamic cavitation device is also connected with a Fenton reagent tank, and a water pump is arranged on a connection pipeline of therotating hydrodynamic cavitation device and the cavitation jet flow generator. A rotating hydrodynamic cavitation mechanism is shearing cavitation, and cavitation jet flow is generated by adopting a special collision wall to produce a region with pressure lower than saturated vapor pressure; ultrasonic cavitation is a cavitation phenomenon generated by ultrasonic waves. The system treats the organic wastewater by adopting a mode of combining a Fenton process and a cavitation technology, the time for degrading pollutants is shortened while the degradation of the organic pollutants is improved,the advantages of the two advanced oxidation technologies including the Fenton process and the cavitation technology are fully exerted, and therefore the degradation rate of the organic wastewater reaches the highest.
Description
technical field [0001] The invention relates to a method and a device for degrading organic waste water, belonging to the technical field of organic waste water treatment. Background technique [0002] Hydrodynamic cavitation technology provides an energy-saving and efficient method for oxidizing pollutants without additional reactants, without causing secondary pollution to the ecological environment, and has great potential in treating low- and high-concentration pollutants. [0003] The cavitation phenomenon is that when the pressure drops below the saturated vapor pressure, the gas dissolved in the fluid will be released, and at the same time, the fluid will vaporize to generate a large number of bubbles. In the process of further flow of the cavitation bubbles with the fluid, when the surrounding pressure increases , the volume will shrink sharply until it collapses, and extremely high pressure and temperature will be generated at the instant of collapse, which will bre...
Claims
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IPC IPC(8): C02F9/04C02F101/30
Inventor 陈颂英侯正金孙逊
Owner SHANDONG UNIV