Experiment And Application Of Micro-vortex Coagulation Process

The safety of drinking water has become one social issue with great importance, traditional disposal process hasn't content with the demands of water quality, drinking water polluted more and more serious. Many efforts have been made in studying water treatment technology by scholars and researchers in the world aiming to meet beings'demands on the drinking water safety.Through the application of the self-designed vortex clarification tank by putting a certain amount of micro-vortex reactor into the tank, and study the effects of micro-vortex reactor in the flocculation areas.The main contexts for the study:1. A laboratory test was carried out under simulated conditions of coagulation in the reaction chamber of vortex2. Not using micro-vortex reactor and using micro-vortex reactor, research affect of the micro-vortex.3. Different temperature and different turbidity, research the effects of micro-vortex clarification.4. Dispose of slightly polluted water use micro-vortex clarification.5. Application of micro-vortex coagulation process in rebuilding engineering of Liling Railway Water PlantThe main research results as following:1. Experiment decide choose PAC as the coagulant of this test and 35mg/l as the optimum amount.2. The rate of inflow is 1m3/h, temperature is 12℃and 28℃, and control turbidity of effluent is 1NTU. The quantity of coagulant is 22mg/L and 28mg/L with no vortex reactor, while the quantity of coagulant is 14mg/L and 18mg/L with vortex reactor.3. The rate of inflow is 10m3h, temperature is 28℃, release by vortex reactor with 35mm aperture. The water inflow quality:turbidity21.7NTU, Zeta potential-26.68, UV254 0.0703cm-1; KMnO4 is 8.16mg/L. (1) the quantity of coagulant is 10mg/L, turbidity of effluent is 2.81, Zeta potential is -10.227, and UV254 rate of removal is 27.3%, KMnO4 rate of removal is 43.2%, equivalent grain size is 0.389mm.(2) the quantity of coagulant is 12mg/L, turbidity of effluent is 0.98, Zeta potential is -3.924, and UV254 rate of removal is 33.9%, KMnO4 rate of removal is 49.6%, equivalent grain size is 0.451mm.(3) the quantity of coagulant is 16mg/L, turbidity of effluent is 0.41, Zeta potential is -1.667, and UV254 rate of removal is 39.5%, KMnO4 rate of removal is 61.2%, equivalent grain size is 0.487mm.4. Application of Micro-vortex Coagulation ProcessThe new technology of coagulation---Micro-whirling reactor and its working mechanism which is whirling-coagulation and contact-flocculation are illustrated Also it tells us the application on Rebuilding Engineering of Liling Railway Water Plant. it argues that in comparison to other flocculation technology, the Micro-vortex flocculation technology deserves widely application for its various advantages, such as its higher coagulation efficiency, shorter reactivity time, the better quality of finished water, lower power consumption, more conveniences in construction and the like.