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公开(公告)号：US20100139481A1
公开(公告)日：2010-06-10
申请号：US12518538
申请日：2007-11-28
CPC分类号： B01D53/68 , B01D61/48 , B01D2257/20 , B01D2258/0216 , C01B7/0706 , C01B7/195 , Y02C20/30
摘要： In a method of treating a gas stream, an aqueous scrubbing liquor is circulated through an essentially closed loop (20) comprising an electrochemical unit (48) for reducing the acidity of the liquor. A portion of the circulating liquor is diverted away from the closed loop (20) to a gas scrubbing unit (10). The gas stream enters the scrubbing unit (10), wherein an acid, for example HF and solid particulates, for example SiO2 particulates, within the gas stream dissolve in the diverted liquor. The diverted liquor is subsequently returned to the closed loop (20), and is replenished in the scrubbing unit (10) by fresh liquor diverted from the closed loop (20). A device (46) is provided for monitoring the acidity of the liquor at a location within the closed loop (20). The reduction in the acidity of the liquor by the electrochemical cell (48) is controlled depending on the monitored concentration. By controlling the acidity of the liquor, the solubility of the solid particulates within the diverted portion of the liquor may be optimised. This can increase the lifetime of one or more filter cartridges (42) located in the closed loop (20) upstream from the electrochemical unit (48).
摘要翻译： 在处理气流的方法中，水洗涤液循环通过包含用于降低液体酸度的电化学单元（48）的基本上闭合的环（20）。 循环液的一部分从闭环（20）转移到气体洗涤单元（10）。 气流进入洗涤单元（10），其中气体流中的酸例如HF和固体颗粒，例如SiO 2颗粒溶解在转移液体中。 转移的液体随后返回到闭环（20），并且通过从闭环（20）转移的新鲜液体在洗涤单元（10）中补充。 提供了一种用于监测在闭环（20）内的位置处液体的酸度的装置（46）。 电化学电池（48）对液体酸度的降低根据监测浓度进行控制。 通过控制液体的酸度，可优化固体微粒在液体转向部分内的溶解度。 这可以增加位于电化学单元（48）上游的闭环（20）中的一个或多个滤筒（42）的寿命。
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公开(公告)号：US08475563B2
公开(公告)日：2013-07-02
申请号：US12518538
申请日：2007-11-28
IPC分类号： B01D53/14
CPC分类号： B01D53/68 , B01D61/48 , B01D2257/20 , B01D2258/0216 , C01B7/0706 , C01B7/195 , Y02C20/30
摘要： In a method of treating a gas stream, an aqueous scrubbing liquor is circulated through an essentially closed loop (20) comprising an electrochemical unit (48) for reducing the acidity of the liquor. A portion of the circulating liquor is diverted away from the closed loop (20) to a gas scrubbing unit (10). The gas stream enters the scrubbing unit (10), wherein an acid, for example HF and solid particulates, for example SiO2 particulates, within the gas stream dissolve in the diverted liquor. The diverted liquor is subsequently returned to the closed loop (20), and is replenished in the scrubbing unit (10) by fresh liquor diverted from the closed loop (20). A device (46) is provided for monitoring the acidity of the liquor at a location within the closed loop (20). The reduction in the acidity of the liquor by the electrochemical cell (48) is controlled depending on the monitored concentration. By controlling the acidity of the liquor, the solubility of the solid particulates within the diverted portion of the liquor may be optimised. This can increase the lifetime of one or more filter cartridges (42) located in the closed loop (20) upstream from the electrochemical unit (48).
摘要翻译： 在处理气流的方法中，水洗涤液循环通过包含用于降低液体酸度的电化学单元（48）的基本上闭合的环（20）。 循环液的一部分从闭环（20）转移到气体洗涤单元（10）。 气流进入洗涤单元（10），其中气体流中的酸例如HF和固体颗粒，例如SiO 2颗粒溶解在转移液体中。 转移的液体随后返回到闭环（20），并且通过从闭环（20）转移的新鲜液体在洗涤单元（10）中补充。 提供了一种用于监测在闭环（20）内的位置处液体的酸度的装置（46）。 电化学电池（48）对液体酸度的降低根据监测浓度进行控制。 通过控制液体的酸度，可优化固体微粒在液体转向部分内的溶解度。 这可以增加位于电化学单元（48）上游的闭环（20）中的一个或多个滤筒（42）的寿命。
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