发明名称 |
METHOD FOR CONTINUOUS DIGESTION OF FIBROUS MATERIAL |
摘要 |
FIELD: cellulose production technology. SUBSTANCE: this relates to continuous isothermic digestion of cellulose under higher pressure and increased temperature of fibrous material in vertical digesting kettle. According to method, delivery of fibrous material and digestion liquor is effected into upper part of digesting kettle 1. Used liquor is branched out from at least one annular sorter 1D of digesting kettle. This sorter is positioned between top and bottom of digesting kettle. Fibrous material is branched out from lower part 1C of digesting kettle. Installed in digesting kettle 1 is additional annular sorter 2. Lower part of this additional sorter is located at less than 5 m distance from upper part of lowest annular sorter 1B of digesting kettle. In result, temperature in all operating digesting zones of kettle can be actually maintained at same level. Application of aforesaid method allows for improving quality of cellulose including its whiteness without resorting to bleaching by means of chlorine-bearing bleaching agents. EFFECT: higher efficiency. 6 cl, 3 dwg
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申请公布号 |
RU2126470(C1) |
申请公布日期 |
1999.02.20 |
申请号 |
RU19950112468 |
申请日期 |
1993.10.08 |
申请人 |
KVAERNER PALPING TEKNOLODZHIZ AB |
发明人 |
OKE BAKLUND;JOKHANNA SVANBERG |
分类号 |
D21C3/24;D21C7/00;D21C7/14;(IPC1-7):D21C3/24 |
主分类号 |
D21C3/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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