SLANT PLATE FOR FLOC FORMATION, AND COAGULATION SEDIMENTATION TREATMENT DEVICE AND TREATMENT METHOD ADOPTING SLANT PLATE

• Main Author: OCHIAI TOSHIAKI
• Format: Patent
• Language: English; Japanese
• Published: 09.03.2022
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

To prevent or reduce occurrence of twin eddy current on a lower side of an opening, and enable efficient coagulation sedimentation treatment in a slant plate for floc formation in which a plurality of the above-said openings are provided in each plate.SOLUTION: A slant plate 1 is located on an upper side of a sludge blanket tank 3 which flocks suspended particles in water to be treated in a process of rising the water to be treated that has flown in from a rapid stirring tank 4 for stirring and mixing the water to be treated and an aggregate, and comprises a plurality of plates 11 having an opening 2. A coagulation sedimentation treatment device can solve the problem by adopting formation of a crossing state on one side of 45° or less, formation of a crossing state on both sides of 90° or less, formation of a projection state of a semicircular shape, or formation of a projection state of a semi-elliptical shape with a long axis in an inclination direction along the inclination as a tip shape of a cross section on a lower side of the opening 2 in the slant plate.SELECTED DRAWING: Figure 3 【課題】各板に複数個の開口部を設けているフロック形成用傾斜板において、当該開口部の下側辺における双子渦流の発生を防止するか、又は減少し得るような構成を提供し、かつ効率的な凝集沈澱処理を可能とすること。【解決手段】被処理水と被凝集剤とを攪拌混合する急速攪拌槽４から流入した被処理水の上昇過程において、被処理水中の懸濁粒子をフロック化するスラッジ・ブランケット槽３の上側に配置され、かつ開口部２を有する複数枚の各板１１からなる傾斜板１において、開口部２の下側辺の断面の先端形状として傾斜方向に沿って、４５°以下の片側における交差状態の形成、又は９０°以下の両側における交差状態の形成、又は半円形状の突出状態の形成、又は傾斜方向を長軸とする半楕円形状による突出状態の形成を採用することによって前記課題を達成することができる凝集沈澱処理装置。【選択図】図３