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2. 发明公开

EP0017348A1 Flue gas scrubbing process using fly ash alkali 有权
标题翻译： Verfahren zum Waschen von Abgas unter Verwendung alkalischer Flugasche。
公开(公告)号：EP0017348A1
公开(公告)日：1980-10-15
申请号：EP80300688.1
申请日：1980-03-06
申请人： PEABODY PROCESS SYSTEMS, INC.
发明人： Johnson, Carlton A.
IPC分类号： B01D53/34
CPC分类号： B01D53/501
摘要： The present invention relates to a fly ash utilization process or system for the removal of sulfur dioxide from the flue gas of coal fired boilers.
In one embodiment, a high ionic concentration is maintained in a closed loop, water balanced system which is operated at a low pH, i.e. less than 4 and preferably less than 3. The ionic concentration of the scrubber slurry is maintained at at least 5,000 parts per million of alkali metal cations, preferably over 10,000 parts per million, at least a substantial portion of which has been leached from fly ash.
The ionic concentration of the scrubber slurry is maintained at a high level by providing small diked areas (38, 42) in a waste pond (34) for settling of undissolved solids wherein the returned supernatant has a high ionic concentration.
A principal advantage of the system is that there is a substantially reduced liquid-to-gas ratio required for scrubbing SO 2 , with substantial savings in pumping and power requirements for the system.
摘要翻译：本发明涉及一种用于从燃煤锅炉的烟道气中除去二氧化硫的粉煤灰利用方法或系统。在一个实施方案中，高离子浓度保持在闭环，水平衡系统中，其在低pH值（即小于4，优选小于3）下操作。维持洗涤器浆料的离子浓度至少5,000ppm的碱金属阳离子，优选超过10,000ppm，至少其中大部分已经从飞灰中浸出。通过在废池（34）中提供用于沉淀未溶解的固体的小的凹陷区域（38,42）将洗涤器浆料的离子浓度保持在高水平，其中返回的上清液具有高离子浓度。该系统的一个主要优点是清洗SO2所需的液体 - 气体比例显着降低，同时大大节省了系统的泵送和功率需求。

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