专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US3814663A Method and apparatus for the continuous digestion of cellulosic materials 失效
标题翻译：连续消耗细胞材料的方法和装置
公开(公告)号：US3814663A
公开(公告)日：1974-06-04
申请号：US20248471
申请日：1971-11-26
申请人： KARLSTAD MEKANISKA AB
发明人： INGEMARSSON G
IPC分类号： D21C3/24 , D21C7/00 , D21C9/02
CPC分类号： D21C3/24 , D21C7/00
摘要： CELLULOSIC MATERIALA ARE CONTINUOUSLY DIGESTED AND SUBSEQUENTLY WASHED WITH A LIQUID TO PRODUCE A PULP IN A CLOSED, SUBSTANTIALLY STRAIGHT VESSEL HAVING AT LEAST ONE PARTITION STRUCTURE WITHIN IT AND EXTENDING GENERALLY TRANSVERSELY AND SUBSTANTIALLY LONGITUDINALLY OF THE VESSEL TO DIVIDE IT INTO AT LEAST TWO GENERALLY LONGITUDINALLY EXTENDING COMPARTMENTS. STEAM IS INTRODUCED INTO THE UPPER PART OF THE VESSEL FOR DIGESTION OF THE MATERIAL, AND A WASHING LIQUID IS INTRODUCED SEPARATLEY UNDER CONTROLLED CONDITIONS INTO THE RESPECTIVE COMPARTMENTS TO WASH THE MATERIAL. CELLULOSIC MATERIALS WHICH HAVE BEEN PRETREATED WITH CHEMICALS THAT PROMOTE DIGESTION ARE INTRODUCED SEPARATELY INTO EACH COMPARTMENT AND ARE WITHDRAWN SEPARATELY FROM EACH COMPARTMENT AT CONTROLLED RATES.

2. 发明授权

US3820452A Method for forming and washing a fibrous web 失效
标题翻译：用于形成和洗涤纤维网的方法
公开(公告)号：US3820452A
公开(公告)日：1974-06-28
申请号：US31416472
申请日：1972-12-11
申请人： KARLSTAD MEKANISKA AB
发明人： ERIKSSON E , INGEMARSSON G
IPC分类号： D21C9/06 , D21C9/18 , D21F9/04 , B30B9/20
CPC分类号： D21C9/18 , D21C9/06 , D21F9/04
摘要： A layer of fibrous material is formed from a suspension of the fibrous material in a suspension liquid by introducing the suspension into a web-forming space defined between a member impermeable to the suspension liquid and a member that is permeable to the suspension liquid but substantially impermeable to the fibrous material and that is moved along an endless path. The thickness of the web-forming space diminishes from the upstream end to the downstream end thereof, relative to the direction of movement of the permeable member. As the suspension moves through the web-forming space, liquid drains through the liquid permeable member under the influence of pressure developed by the delivery pressure, coupled with the convergence of the space, thereby producing a fibrous layer in the web-forming space. The fibrous layer is washed by supplying liquid under pressure through a permeable element positioned opposite the permeable member downstream from the web-forming space. The volumetric flow rate of liquid is controlled so that the wash liquid displaces the suspension liquid in the web to a depth that is less than the thickness of the layer. The remaining suspension liquid and a small amount of wash liquid are ultimately displaced from the web in a press nip.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式