PAFC first three outs coagulation process

PAFC is aluminum ( aluminum sulfate ) and iron coagulation hydrolysis , and set them on the merits of a new and efficient coagulant It is also the wastewater treatment coagulant. Well, you know ferric chloride coagulation in the first three kind of how it is played . We dibasic lead stearate  take a look at three stages of the coagulation process and the formation of hydraulic conditions alum status .
Condensed phases: the liquid is injected into the raw water coagulation tank with rapid coagulation in a very short period of time the process of forming a fine alum , when the water becomes more turbid , it requires water to produce intense turbulence . Beaker experiment should be fast ( 250-300 rev / min ) was stirred for 10-30S, generally no more than 2min.
Flocculation stages: yes alum  n-butyl stearate grow thicker process, requiring an appropriate degree of turbulence and sufficient residence time (10-15min), to the later observed sinking slowly gathered a large number of alum to form a clear surface layer . Beaker experiment first with 150 rev / min stirring for about 6 minutes, then 60 cycles / minute to about 4 minutes was stirred in suspension .
Settlement stage : it is carried out in the settlement pool floc settlement process , requiring slow water flow , to improve the general efficiency of the use of ramps ( plate ) settling pond , lots of thick alum perianth inclined tube ( plate ) and deposited in the  glyceryl monostearate pool wall barrier end of the upper water to clarify the water , the rest of the small particle size, density alum side down slowly , while continuing to collide knot large cloud -to-late I basically unchanged . Beaker experiments should be 20-30 rev / min slow stirring for 5 minutes, then 10 minutes of static sink , than measured turbidity . PAFC take aluminum ( such as aluminum sulfate , etc. ) , iron coagulant their respective flotation operation advantageous to improve the PAC coagulation performance ; the high turbidity water and low temperature and low turbidity water purification effect is particularly evident not add alkaline additives or other coagulant .