首页>
外国专利>
METHOD AND APPARATUS TO PRODUCE PULP USING PRE-HYDROLYSIS AND KRAFT COOKING
METHOD AND APPARATUS TO PRODUCE PULP USING PRE-HYDROLYSIS AND KRAFT COOKING
展开▼
机译:利用预水解和牛皮纸制浆生产纸浆的方法和装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
A pulp cooking system including: a cellulosic material feed system, a pre-hydrolysis reactor vessel and a Kraft cooking reactor vessel. The feed material system includes a steaming chip bin (10) and a high pressure transfer device (12). The pre-hydrolysis reactor vessel maintains the feed material in a mildly acidic condition and allows hydrolysate to be extracted through screens (60) below a hydrolysis zone (56) in the vessel. A wash zone (66) is below the screens and allows wash liquid to flow through the feed material in a cross-current direction. The wash liquid and hydrolysate removed from the feed material is extracted from the wash zone through the screens (60). The feed material is maintained in a mildly acidic condition through the pre-hydrolysis reactor vessel until the material enters the Kraft cooking vessel where the feed material is treated with alkaline cooking liquors.
展开▼