提高棉短绒蒸煮质量的技术措施

Technical Measures for Improving the Cooking Quality of Cotton Linter

棉短绒碱液浸渍渗透均匀性与蒸球内部温度分布的均匀性是影响蒸煮质量的关键因素。传统蒸煮方法和加温方式受棉短绒的脂肪、蜡质和蒸球结构影响,药液渗透效果差,浸渍不均匀,并形成蒸球温度上高下低,难以获得蒸煮均匀的浆料。采用预浸桶浸渍渗透、双螺杆挤压浸渍渗透、中通管定向喷射加温和新型刮板等技术可有效提高蒸煮质量和效率。

Alkali liquor uniform penetration into the cotton linter and the uniformity of the temperature distribution are key factors affecting the quality of the cotton pulp cooking in a global digester. Traditional methods of cooking and heating caused poor liquid penetration effect,uneven impregnation and temperature higher at the upper part than the lower part in the digester due to the fat and wax content in cotton litter and the global digester strcture,it was difficult to produce homogeneous pulp. The paper suggested the measures including using large liquor ration for penetration but small liquor ration for cooking; carrying out penetration in a pre-penetration tank; directionally heating by using a center steam pipe and applying new scraper and twin screw extrusion impregnation technology could effectively improve the cooking quality and efficiency.