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1. 发明公开

EP0754799A3 Leaching process 失效
标题翻译：浸出过程
公开(公告)号：EP0754799A3
公开(公告)日：1997-03-26
申请号：EP96201661.4
申请日：1996-06-14
申请人： Eka Chemicals AB
发明人： Landfors, Johan , Hammer-Olsen, Roy , Häggström, Kimona
IPC分类号： D21C11/06 , D21C11/12
CPC分类号： D21C11/125 , C02F1/469 , D21C11/066
摘要： An increasing problem with the pulping chemical recovery system, is the presence of chloride and potassium in the recovery boiler. Chloride and potassium increase inter alia the stickiness of carryover deposits and dust particles to the recovery boiler tubes, which accelerate fouling, corrosion and plugging of the recovery boiler. As the environmental legislation becomes more stringent, the degree of system closure increases. The present invention relates to a process by which the collected precipitator dust (1) is leached (2), at a temperature exceeding 50°C, for a residence time sufficient to get a chloride and potassium enriched leach solution (4) and to remove at least a part of the content of metal ions in a solid phase (3). Said leach solution is electrochemically treated (5), preferably in an electrodialysis cell, in order to remove at least a part of the chloride and potassium therein. By the present process, the problem of sticky deposits in the recovery boiler can be substantially reduced. This means an improved energy efficiency as well as a higher degree of recovery of the pulping and bleaching chemicals.
摘要翻译：制浆化学回收系统存在的问题是回收锅炉中存在氯化物和钾。氯化物和钾会增加夹带沉积物和灰尘颗粒到回收锅炉管的粘性，这会加速回收锅炉的结垢，腐蚀和堵塞。随着环境立法越来越严格，系统关闭的程度越来越高。本发明涉及一种方法，其中在超过50℃的温度下将收集的沉淀器粉尘（1）浸出（2）足以获得富含氯化物和钾的浸出溶液（4）的停留时间并去除（3）中的至少一部分金属离子的含量。所述浸出溶液电化学处理（5），优选在电渗析池中，以除去其中的至少一部分氯化物和钾。通过本过程，回收锅炉中的粘性沉积物的问题可以大大减少。这意味着改进的能源效率以及制浆和漂白化学品的更高程度的回收率。

2. 发明授权

EP0852272B1 Recovery process in a pulp mill 失效
标题翻译：在纸浆厂恢复过程
公开(公告)号：EP0852272B1
公开(公告)日：2002-03-27
申请号：EP97203861.6
申请日：1997-12-10
申请人： Eka Chemicals AB
发明人： Pudas, Roland , Linsten, Magnus , Svedin, Björn , Velander, Ingrid , Hammer-Olsen, Roy
IPC分类号： D21C11/04 , D21C11/06 , D21C11/02
CPC分类号： D21C11/005 , D21C11/066

3. 发明授权

EP0754799B1 Leaching process 失效
标题翻译：浸出
公开(公告)号：EP0754799B1
公开(公告)日：1998-12-09
申请号：EP96201661.4
申请日：1996-06-14
申请人： Eka Chemicals AB
发明人： Landfors, Johan , Hammer-Olsen, Roy , Häggström, Kimona
IPC分类号： D21C11/06 , D21C11/12
CPC分类号： D21C11/125 , C02F1/469 , D21C11/066

4. 发明公开

EP0852272A1 Recovery process in a pulp mill 失效
标题翻译： Rückgewinnungsverfahren在einer Zellstoffabrik
公开(公告)号：EP0852272A1
公开(公告)日：1998-07-08
申请号：EP97203861.6
申请日：1997-12-10
申请人： Eka Chemicals AB
发明人： Pudas, Roland , Linsten, Magnus , Svedin, Björn , Velander, Ingrid , Hammer-Olsen, Roy
IPC分类号： D21C11/04 , D21C11/06 , D21C11/02
CPC分类号： D21C11/005 , D21C11/066
摘要： A substantial and increasing problem with the pulping chemical recovery system, is the presence of chloride and potassium in the spent liquor entering the recovery boiler. Chloride and potassium increase the stickiness of carryover deposits and dust particles to the recovery boiler tubes, which accelerate fouling and plugging in the upper part of the recovery boiler. The present invention relates to a process by which the content of potassium ions in a recovery system for pulping chemicals can be reduced. The process comprises bringing spent liquor to a recovery boiler, burning said spent liquor, collecting precipitator dust formed, forming a solution by dissolving the precipitator dust (9) in a liquid (2,31,71), where the solution of precipitator dust is subjected to a treatment with an inorganic ion exchange material (8) in order to remove at least a part of the potassium therein.
摘要翻译：制浆化学回收系统的一个重大和不断增加的问题是在进入回收锅炉的废液中存在氯化物和钾。氯离子和钾将回收沉积物和灰尘颗粒粘附到回收锅炉管中，加速回收锅炉上部的结垢和堵塞。本发明涉及一种可以减少制浆化学品回收系统中钾离子含量的方法。该方法包括将废液倒入回收锅炉中，燃烧废液，收集除尘器灰尘，通过将除尘器粉尘（9）溶解在液体（2,31,71）中，将除尘器粉尘溶液用无机离子交换材料（8）进行处理，以除去其中至少一部分钾。

5. 发明公开

EP0754799A2 Leaching process 失效
标题翻译： Auslaugungsverfahren
公开(公告)号：EP0754799A2
公开(公告)日：1997-01-22
申请号：EP96201661.4
申请日：1996-06-14
申请人： Eka Chemicals AB
发明人： Landfors, Johan , Hammer-Olsen, Roy , Häggström, Kimona
IPC分类号： D21C11/06 , D21C11/12
CPC分类号： D21C11/125 , C02F1/469 , D21C11/066
摘要： An increasing problem with the pulping chemical recovery system, is the presence of chloride and potassium in the recovery boiler. Chloride and potassium increase inter alia the stickiness of carryover deposits and dust particles to the recovery boiler tubes, which accelerate fouling, corrosion and plugging of the recovery boiler. As the environmental legislation becomes more stringent, the degree of system closure increases. The present invention relates to a process by which the collected precipitator dust (1) is leached (2), at a temperature exceeding 50°C, for a residence time sufficient to get a chloride and potassium enriched leach solution (4) and to remove at least a part of the content of metal ions in a solid phase (3). Said leach solution is electrochemically treated (5), preferably in an electrodialysis cell, in order to remove at least a part of the chloride and potassium therein. By the present process, the problem of sticky deposits in the recovery boiler can be substantially reduced. This means an improved energy efficiency as well as a higher degree of recovery of the pulping and bleaching chemicals.
摘要翻译：制浆化学回收系统越来越多的问题是回收锅炉中存在氯化物和钾。氯化物和钾尤其增加了回收沉积物和灰尘颗粒对回收锅炉管的粘性，这加速了回收锅炉的结垢，腐蚀和堵塞。随着环境立法变得越来越严格，系统关闭程度也越来越高。本发明涉及在超过50℃的温度下将收集的除尘器粉尘（1）浸出（2）达到足以获得氯化物和富钾浸出溶液（4）的停留时间并除去的方法在固相（3）中金属离子含量的至少一部分。所述浸出溶液优选在电渗析池中电化学处理（5），以除去其中的至少一部分氯化物和钾。通过本方法，可以显着降低回收锅炉中的粘性沉积物的问题。这意味着提高能源效率以及更高程度的制浆和漂白化学品的回收率。

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