| In order to solve the increasingly prominent problem of water pollution,it is imminent to study a new method and technology for water treatment.The special physical and chemical environment by hydrodynamic cavitation bubble collapse moment to achieve the formation of degradation of organic matter in water.In this paper,choking cavitation and gas-liquid two-phase flow principle to develop a new type of hydraulic cavitation generator-piston reciprocating choking cavitation generator based on.The simplified cavitation model is simulated by Fluent.The reliability of back pressure synchronous control valve is verified by piston driven reciprocating choker.The theoretical calculation model of piston driven reciprocating choke cavitation generator is established.The key structure and motion parameters for choke cavitation are calculated by using theoretical mechanics and hydrodynamics.The three-dimensional structure design,motion simulation analysis and engineering drawing of reciprocating choke cavitation generator driven by piston are completed based on Pro/E.The simplified cavitation model is simulated by Fluent.The calculation and simulation results show that the optimum parameters of piston driven reciprocating choke cavitation generator are:piston cylinder diameter 150 mm,nozzle diameter 3 mm,crank length 60 mm,connecting rod length 480 mm,crank speed 60 r/min.The simulation results show that the piston driven reciprocating Yong plug cavitation device can produce cavitation,the cavitation effect is very sensitive to the back pressure,and the best back pressure under the simulation test condition is 200KPa.The experimental platform of phenol degradation by cavitation was built to verify the synchronous control effect of back pressure synchronous control valve.The experimental results show that the design of piston driven reciprocating Yong plug cavitation device is feasible,and the back pressure synchronous control valve can effectively control the back pressure. |
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