公开(公告)号：US5200160A

公开(公告)日：1993-04-06

申请号：US751754

申请日：1991-08-29

申请人： Lewis B. Benson ,  Yungli J. Lee ,  John W. College

发明人： Lewis B. Benson ,  Yungli J. Lee ,  John W. College

IPC分类号： B01D53/34 ,  B01D53/60 ,  B01D53/75 ,  B01D53/77

CPC分类号： B01D53/60 ,  B01D53/75

摘要： A process for removing sulfur dioxide and nitrogen oxide from flue gases in a wet scrubbing system using lime to remove the sulfur dioxide and ferrous-EDTA to remove the nitrogen oxides, where an initial reducing agent, such as sodium sulfide, and an antioxidant, such as hydrazine, are added to the scrubbing system, with oxidation of the ferrous-EDTA to ferric-EDTA curtailed while removal of nitrogen oxides is increased.

公开(公告)号：US5082639A

公开(公告)日：1992-01-21

申请号：US610151

申请日：1990-11-06

申请人： Yungli J. Lee ,  Lewis B. Benson

发明人： Yungli J. Lee ,  Lewis B. Benson

IPC分类号： B01D53/50 ,  C04B2/06

CPC分类号： C04B2/06 ,  B01D53/501

摘要： A wet scrubbing process for removing sulfur dioxide from combustion gases uses an aqueous slurry containing calcium components resulting from the slaking of lime, with the slaked lime formed by mixing lime with water containing a calcium sulfur-oxide salt. The presence of the calcium sulfur oxide salt in the slaking water results in a more easily dewatered sludge that is subsequently removed from the wet scrubbing system.

公开(公告)号：US5310498A

公开(公告)日：1994-05-10

申请号：US128732

申请日：1993-09-30

申请人： Yungli J. Lee ,  Lewis B. Benson

发明人： Yungli J. Lee ,  Lewis B. Benson

IPC分类号： B01D53/50 ,  C04B2/06 ,  C09K3/00 ,  C01B17/00 ,  C01F11/46

CPC分类号： C04B2/06 ,  B01D53/501

摘要： A wet scrubbing process for removing sulfur dioxide from combustion gases uses an aqueous slurry containing calcium components resulting from the slaking of lime, with the slaked lime formed by mixing lime with water containing a calcium sulfur-oxide salt. The presence of the calcium sulfur oxide salt in the slaking water results in a more easily dewatered sludge that is subsequently removed from the wet scrubbing system.

摘要翻译： 用于从燃烧气体中除去二氧化硫的湿式洗涤方法使用含有由石灰制成的钙成分的含水浆料，通过将石灰与含有钙硫氧化物盐的水混合而形成的消石灰。 在硫化水中钙硫氧化物盐的存在导致更容易脱水的污泥，随后从湿式洗涤系统中除去。

公开(公告)号：US4976937A

公开(公告)日：1990-12-11

申请号：US462083

申请日：1990-01-08

申请人： Yungli J. Lee ,  Lewis B. Benson ,  John W. College

发明人： Yungli J. Lee ,  Lewis B. Benson ,  John W. College

IPC分类号： B01D53/50 ,  C01B17/64

CPC分类号： C01B17/64 ,  B01D53/501 ,  B01D53/502

摘要： A method for removing sulfur dioxide from flue gases in a wet scrubbing system where calcium thiosulfate and calcium polysulfides are formed by the reaction of lime and emulsified sulfur and the mixture added to a recycle tank of the wet scrubber where it reacts with sulfites and bisulfites in the scrubbing slurry to produce thiosulfates from the calcium polysulfides, with the slurry then returned to the scrubber. The mixture of calcium thiosulfate and calcium polysulfides may be formed in the lime slaking tank or lime storage tank of a lime scrubbing system or formed in a mixing tank and added to a lime or limestone scrubbing system.