SOLID/LIQUID SEPARATION DEVICE, AND ACTIVE SLUDGE PROCESSING METHOD

• Main Author: FUJINO SEIJI
• Format: Patent
• Language: English; Japanese
• Published: 09.04.2024
• Subjects: CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

To provide a solid/liquid separation device which is space-saving, is excellent in processing efficiency, and contributes to decreasing excess sludge.SOLUTION: A solid/liquid separator 20 separating inorganic sludge and water from solid/liquid mixed water including inorganic sludge, comprises a plurality of bars 27 disposed parallel to each other with a predetermined gap apart, a support 26 supporting the inorganic sludge, a plurality of rotary shafts 29 disposed to orthogonally cross the bars 27 in the stretching direction of the bars 27 in the plan view of the support 26, and a plurality of rotors 28 fixed to the rotary shaft 29 in the shaft direction of the rotary shaft 29 so as to be disposed alternately with the bars 27, in which the outer circumferential shape of the rotor 28 is oval, or roughly oval with protrusions or recesses formed on a portion of the oval shape satisfying the following formulae (1) to (4) on the xy orthogonal coordinate when viewed in the shaft direction of the rotary shaft 29. x2/a2+y2/(a2+c2)=1: (1), a2+c2=b2: (2), 0<a<b: (3), a+b<S≤2b: (4).SELECTED DRAWING: Figure 2 【課題】省スペースでありつつ処理効率に優れ、余剰汚泥の低減に寄与する固液分離装置を提供する。【解決手段】固液分離装置２０は、無機質系汚泥を含む固液混合水から無機質系汚泥と水とを分離させ、所定の間隔を開けて平行に配置される複数のバー２７を有し、無機質系汚泥を支持する支持部２６と、支持部２６の平面視において、バー２７の延伸方向へとバー２７と直交して配置される複数の回転軸２９と、回転軸２９の軸方向に、バー２７と交互に配置されるように回転軸２９に固定される複数の回転体２８とを備え、回転体２８の外周形状は、回転軸２９の軸方向に見た場合、ｘｙ直交座標において、下記式（１）～（４）を満たす楕円形状、または、該楕円形状の一部に凹部若しくは凸部を有する略楕円形状である。ｘ２／ａ２＋ｙ２／（ａ２＋ｃ２）＝１・・・（１）ａ２＋ｃ２＝ｂ２・・・（２）０＜ａ＜ｂ・・・（３）ａ＋ｂ＜Ｓ≦２ｂ・・・（４）【選択図】図２