| Water source pollution and improving drinking water quality standards is to promote the development of water treatment technology to the most important driving force. Seek new technologies to improve safety and security of drinking water or alternative water treatment process is important to study the contents of the field of water treatment. In fact, in order to clarify the main water filtration Although the main function of conventional treatment process is in addition to turbidity, but there are a considerable addition to fouling, because some non-water soluble organic pollutants can be accompanied by the removal of turbidity and removal of material some dissolved organic pollutants may also be attached to the turbidity of the material was removed. And to play a major role in coagulation, enhanced coagulation is to enhance the capacity of water treatment system to remove organic matter crucial. To clarify the process can efficiently remove the water molecules, the hydrophobic nature, humus and organic UV-absorbing. Therefore, full capacity of conventional technology in addition to pollution, reduce or omit a special addition to pollution process is undoubtedly economic and simple method for removal of pollution. In recent years, the indicators of drinking water in developed countries increasingly stringent requirements proposed, and to strengthen the process and flocculation water treatment technology as an important and urgent research topic.Subject from both theoretical and experimental exposure of micro-vortex device flocculation process was studied to explore, through the analysis of mixing, flocculation, sedimentation process, micro vortex floc and the relationship between floc strength and density in to clarify the characteristics of the hydraulic device, made the whole process of micro-vortex concept of water clarifier, through theoretical analysis and experimental parameters were optimized so that the clarifier effluent turbidity≤1NTU.Scroll through the vortex strength and micro-scale analysis of theoretical formula, Effective energy dissipation obtainedεand the relationship between the total energy E, Equationλ= (v3/ε) 1/4 can be used to calculate the vortex in the process of flocculation microλvalue.Experiments show that exposure to micro-eddy flocculation flocculation clarifier suspended reaction zone in contact with the Reynolds number was 1.4, indicating that the reaction zone in contact flocculation of suspended are micro-eddy flocculation state.Flocculation depends on the vortex size and vortex strength. The smaller scale vortex, vortex strength is, in the wing area and effective energy partition flocculationε= 1.16 W/m3, vortex microscaleλ0= 0.171×10-3 m, reaction zone in the contact flocculation of suspended effective energyε= 0.13 W/m3,λ0= 0.296×10-3 m micro vortex. In the flocculation process, to take the appropriate grade to meet the flocs grow older, the corresponding reduced rate of input energy to adapt to the larger flocs to the objective requirements of a large knot.Eddy contact flocculation clarifier (Model 2) divisions in the wing area flocculation, floc by the 485s-1 with consecutive 95s-1 velocity gradient effect, produce a strong flocculation extrusion experience, so that the pore floc rate and the volume decreases, density increases, is conducive to precipitation. When the suspended floc flocculation reaction zone into contact with after the collision between the floc particles adsorption, contact flocculation, filtration and other process synergies.Through the ramp for small pitch and spacing of the energy consumption of the theory of optimization analysis, the small distance between ramps lowest water flow in the energy optimization of the oblique plate spacing is calculated asδ0=(?), the type that affect the energy consumption of a small pitch ramp The main factors of the dynamic viscosity of water, flow between the plates, plate length, plate pressure at both ends and so on. Eddy contact flocculation clarifier (model 2) spaced inclined plate sedimentation load surface area 16.67m3/(m2·h) (4.6 mm/s), the optimized ramp spacing should be 21mm.Tests showed that the raw water quality conditions and the dosage of roughly the same conditions, PAFC addition to the effect of pollution is better than PAC, PAFC+HPAM or PAC+HPAM United dosing or addition to the effect of pollution than PAFC PAC used alone, joint investment In addition to overtime PAFC+HPAM pollution better than PAC+HPAM, and PAFC+HPAM suspension formed by the small thickness.Eddy contact flocculation clarifier (model 2) stable operation, the reaction zone in the contact flocculation of suspended 5min settlement ratio of about 10%-14%, suspended solids concentration of about (20-25) g/L.When the inlet flow rate of 200 L/h, the micro-vortex contact flocculation clarifier (model 2) stable operation, the mixing zone velocity gradient 1289.5s-1, flocculation baffle wing area for the 91s-1velocity gradient, the contact flocculation velocity gradient of the reaction zone suspended 30s-1; mixing time is 0.llmin, flocculation time was 12.10min, spaced inclined plate settling time of 3.14 min, to clarify the time 3.01min, the total residence time of 18.36 min; contacts flocculation of suspended increased the flow rate of the reaction zone 1.4 mm/s, the small spacing between the increase in flow rate ramp 5.3 mm/s, to clarify the district increased the flow rate of 4.6 mm/s, the clarifier effluent turbidity≤1NTU.
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