Principle And Performance Research On Sediment Wall

The sedimentation technology is one of the traditional water treatments, belonging to the general treatment technology, and it is widely applied in water supply, sewage treatment and industrial wastewater treatment fields. Before 1970s, the horizontal flow sedimentation process had been playing a main role in water treatment industry in China. The application of horizontal flow sediment tanks has a long history that could be traced back to centuries ago. The inclined tubing (tube sheet) sediment tanks are the kind of high efficiency designed from the shallow tank theory. 度 rrently, in our country, the most widely and successfully applied one is the counter flow inclined tubing (tube sheet) sedimentation method.Sediment wall is brought forward by the shallow tank theory too, this text analyses homology and differentia between the sediment wall and traditional sediment pool in theory; designs a sediment wall equipment to test in the zishijing water of jinshan region in shanghai, studies the treatment effect of the sediment wall to the zishijing water and the factors affecting the water effect of sediment; researches the disposal effect of the sediment wall in different load, and the disposal effect of the sediment wall in different drug quantity when it is in the same load.The main research achievements of this paper include: the load of the sediment wall is improved with the add of highness, easy to achieve the high deal load and compact structure disposal cell. The flow quality of the sediment wall is decided by run load, and the sediment wall has the advantage that the flow quality is improved by the debase of the run load. When fixing the run load, the quantity of coagulation drug is the mostly factor affecting the flow quality of the sediment wall, and in certain range , the flow quality of the sediment wall is improved by the add of coagulation drug . When demand the flow quality is thereinafter the 3NTU ,excluding the mud factor ,it is achieved by the load is thereinafter the 4m~3/ (m~2h) . When demand the flow quality is thereinafter the 1NTU, excluding the mud factor ,it is achieved by the load is thereinafter the 4 m~3/ (m~2h) and best coagulation . In the run period , when it is in interval expelling mud ,the flow quality changes bigger than in the series expelling mud, but it has the economy character when it is in the low load or low drug, and it is the same with the low-rise occasion; in the run period, when it is in series expelling mud, the flow quality is excellent and stabilized ,but because row some treat water, it's economy cost is little higher than in interval expelling mud, and it is the same with the high-rise occasion...