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1. 发明申请

WO2017212111A1 METHOD OF PRODUCING CHEMICAL PULP AT A DIGESTER PLANT OF A CHEMICAL PULP MILL 审中-公开
标题翻译：在化学造纸厂的消化装置上生产化学浆的方法
公开(公告)号：WO2017212111A1
公开(公告)日：2017-12-14
申请号：PCT/FI2017/050408
申请日：2017-06-01
申请人： ANDRITZ OY
发明人： KETTUNEN, Auvo , ENGSTRÖM, Johan , PIIRA, Jussi
IPC分类号： D21C7/10 , D21C7/14
摘要： The present invention relates to a method of producing chemical pulp at a con¬ tinuous digester plant. The method comprises the following steps: a) leading a slurry formed of comminuted cellulosic fibrous material and liquid into a digester and treating the material with a treatment chemical at a temperature over 130 °C for producing treated material and black liquor; b) extracting at least one black liquor stream from the digester and leading the black liquor into an indirect heat exchange relationship with steam in a heat ex¬ changer for heating the black liquor; c) leading the heated black liquor into a flashing vessel, wherein flash steam and flashed black liquor are generated, and d) using flash steam from step c) for heating the fibrous material in the digester in step a).
摘要翻译：本发明涉及一种生产化学纸浆的方法，小型消化器厂。该方法包括以下步骤：a）将由粉碎的纤维素纤维材料和液体形成的浆料导入蒸煮器中，并且在130℃以上的温度下用处理化学品处理该材料以产生处理的材料和黑液; b）从蒸煮器中提取至少一种黑液流，并使黑液与蒸汽在热量和非热量之间进入间接热交换关系; 加热黑液的转换器; c）将加热的黑液引入闪蒸容器中，其中产生闪蒸蒸汽和闪蒸黑液，以及d）使用来自步骤c）的闪蒸蒸汽在步骤a）中加热蒸煮器中的纤维材料。

2. 发明申请

WO2019170962A1 METHOD OF PRODUCING DISSOLVING PULP 审中-公开
公开(公告)号：WO2019170962A1
公开(公告)日：2019-09-12
申请号：PCT/FI2019/050176
申请日：2019-03-06
申请人： ANDRITZ OY
发明人： KETTUNEN, Auvo , LAAKSO, Sampsa , HAATAINEN, Tiina , PAANANEN, Markus
IPC分类号： D21C1/04 , D21C3/02 , D21C9/10 , D21C9/00 , C08B1/00 , D21C11/00
摘要： The present invention relates to a process for producing dissolving pulp from comminuted wood-based fibrous material. The process comprises the following consecutive stages: cooking comminuted fibrous material with alkaline cooking liquor in a kraft cooking process to produce pulp; treating the cooked pulp in caustic extraction at a temperature of 70-110 °C and in an effective alkali concentration of 60-120 g/l for at least 5 minutes, and washing and oxygen delignifying the caustic extracted pulp.

3. 发明申请

WO2016038251A1 HEATING OF HYDRAULIC DIGESTERS 审中-公开
标题翻译：液压加热器加热
公开(公告)号：WO2016038251A1
公开(公告)日：2016-03-17
申请号：PCT/FI2015/050592
申请日：2015-09-10
申请人： ANDRITZ OY
发明人： KETTUNEN, Auvo , HEINÄMÄKI, Pasi , PELTONEN, Kari , RÅMARK, Hannu
IPC分类号： D21C7/06 , D21C7/10
CPC分类号： D21C7/10 , D21C3/24 , D21C7/06
摘要： The present invention relates to a method of heating a hydraulic digester, such as a single-vessel hydraulic digester, which has a top separator, a level of chips and a liquid phase above the level of chips. The method comprises at least the following steps: a. entraining chips in liquor to produce a slurry having a first temperature, b. feeding the slurry of chips to the digester through the top separator, c. supplying direct steam to the liquid phase between the level of chips and the top separator to heat the slurry to a second temperature for the impregnation stage, wherein the steam is fed by using at least one steam injector having a plurality of steam discharge openings; and d. heating the slurry to a third temperature and cooking the chips in a cooking zone, and withdrawing the cooked pulp from the bottom of the digester. The invention relates also to a digester system.
摘要翻译：本发明涉及一种加热液压消化器的方法，例如单容器液压消化器，其具有顶部分离器，切片水平和高于切片水平的液相。该方法至少包括以下步骤：a。在液体中夹带碎屑以产生具有第一温度的浆料，b。通过顶部分离器将碎屑浆料送入蒸煮器，c。向芯片级和顶部分离器之间的液相供应直接蒸汽以将浆料加热至用于浸渍阶段的第二温度，其中通过使用具有多个蒸汽排放口的至少一个蒸汽喷射器供给蒸汽; 和d。将浆料加热到第三温度并在烹饪区域中烹饪碎片，并从煮熟器的底部取出煮熟的纸浆。本发明还涉及一种蒸煮器系统。

4. 发明申请

WO2020070389A1 METHOD OF FEEDING WOOD CHIPS TO A PREHYDROLYSIS REACTOR 审中-公开
公开(公告)号：WO2020070389A1
公开(公告)日：2020-04-09
申请号：PCT/FI2019/050706
申请日：2019-10-02
申请人： ANDRITZ OY
发明人： ANDRADE, Marco , GEIGER, Ronny , KAIPAINEN, Vesa , KETTUNEN, Auvo , TARJAVUORI, Petri , VIANNA, Viridiane
IPC分类号： D21C1/02 , D21C1/06 , D21C7/06
摘要： The invention relates to a method for feeding a slurry of chips and liquid to a prehydrolysis reactor in the production of dissolving pulp. The slurry is pumped by using at least one pump to the reactor, and alkali is fed into the at least one pump 5 for adjusting the pH of the slurry to a range of 7-10.

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