关键词: 纤维素, 预敷过滤, 孔隙率, 比阻, 可压缩性系数

Abstract: In this paper，a study of precoat filtration with cellulose filter aid added to high viscosity materials is presented. Different precoat filtration conditions greatly affect the filtration performance of a precoat cake layer. Specific resistance，compressibility coefficient and porosity of cellulose cake layer were studied by changing precoat pressure and concentration. Experimental results show that the specific resistance of cellulose precoat layer increases as pressure drop increases and decreases as concentration increases；the porosity of cellulose precoat layer decreases as pressure drop increases and increases as concentration increases；the compressibility coefficient of cellulose precoat layer increases as concentration increases. Cellulose filter aid is moderately compressible material. The cellulose precoat layer has high porosity. The results provide a reference for engineering applications of precoat filtration with cellulose added to high viscosity materials.

Key words: cellulose, precoat filtration, porosity, specific resistance, compressibility coefficient