WATER WASHING TREATMENT SYSTEM, AND CONTROL METHOD FOR WATER WASHING TREATMENT SYSTEM

To provide a water washing treatment system in which outflow of suspended substances attendant on a supernatant portion can be further reduced compared to a conventional slurry treatment method.SOLUTION: A water washing treatment system for powder including a water soluble chlorine-containing compound is provided, comprising: a rinse tank which mixes the powder and water to prepare slurry; a mixing tank mixing the slurry and a coagulant; a first settling tank which precipitates dispersion formed in the slurry to form a supernatant portion and a concentrated portion; a first extraction line which extracts at least a part of the supernatant portion from the first settling tank; and a measuring unit which measures a suspended substance concentration of the supernatant portion extracted by the first extraction line. At least one of a concentration of the slurry and a supply amount of the coagulant that are supplied to the mixing tank, is adjusted on the basis of the suspended substance concentration of the supernatant portion.SELECTED DRAWING: Figure 1 【課題】従来のスラリー処理方法よりも上澄み部に伴って懸濁物質が流出することを低減可能な水洗処理システムを提供すること。【解決手段】本開示の一側面は、水溶性塩素含有化合物を含む粉体の水洗処理システムであって、上記粉体と水とを混合してスラリーを調製する水洗槽と、上記スラリーと凝集剤とを混合する混和槽と、上記スラリー中に形成される分散体を沈降させ上澄み部と濃縮部とを形成する第一沈殿槽と、上記上澄み部の少なくとも一部を上記第一沈殿槽から抜き出す第一抜出ラインと、上記第一抜出ラインによって抜き出された上記上澄み部の懸濁物質濃度を測定する測定部と、を備え、上記上澄み部の懸濁物質濃度に基づいて、上記混和槽に供給される上記スラリーの濃度及び上記凝集剤の供給量の少なくとも一方が調整される、水洗処理システムを提供する。【選択図】図１