公开(公告)号：US5785841A

公开(公告)日：1998-07-28

申请号：US635330

申请日：1996-04-19

申请人： Shiaw C. Tseng

发明人： Shiaw C. Tseng

IPC分类号： B01D53/14 ,  B01D53/32 ,  C25B9/08 ,  C25B11/03 ,  C25B11/10 ,  C25B15/08 ,  C25C7/02 ,  B01D17/06 ,  B01D59/40 ,  C01B17/20 ,  C01B21/00

CPC分类号： C25B9/08 ,  B01D53/1425 ,  B01D53/326 ,  C25B11/03 ,  C25B11/035 ,  C25B15/08 ,  C25C7/02

摘要： A method for removing sulfur dioxide and nitrogen oxides from a gaseous stream using a magnesium-enhanced lime scrubbing slurry containing a ferrous chelate where oxidized ferrous chelate is regenerated by electrochemical treatment. The spent scrubbing solution containing ferric chelates is passed as a catholyte, at an acidic pH of 4.0-6.5 through a cathode compartment while an anolyte solution containing magnesium sulfate, at a pH of 1.5 to 6.5 is passed through an anode compartment, the compartments separated by a microporous separator. An electrical current is passed from the cathode compartment to the anode compartment and ferric chelates are regenerated to ferrous chelates.

摘要翻译： 使用含有亚铁螯合物的镁强化石灰洗涤浆液从气流中除去二氧化硫和氮氧化物的方法，其中氧化亚铁螯合物通过电化学处理再生。 含有铁螯合物的废擦洗溶液作为阴极电解液通过阴极室在酸性pH为4.0-6.5的条件下通过，而含有1.5至6.5的pH的硫酸镁的阳极电解液通过阳极室，隔室分离 通过微孔分离器。 电流从阴极室传递到阳极室，铁螯合物再生成亚铁螯合物。

公开(公告)号：US5683666A

公开(公告)日：1997-11-04

申请号：US602876

申请日：1996-01-19

申请人： Daniel W. Berisko

发明人： Daniel W. Berisko

IPC分类号： B01D53/60 ,  C01B17/62 ,  C01B17/96 ,  C01B21/096 ,  C01F5/22 ,  C01B17/22

CPC分类号： C01B17/96 ,  B01D53/60 ,  C01B17/62 ,  C01B21/096 ,  C01F5/22 ,  B01D2251/90 ,  B01D2251/902

摘要： A process for the simultaneous removal of sulfur dioxide and nitrogen oxides from a gaseous stream uses a sorbent containing magnesium ions and sulfite ions for sulfur dioxide removal and a metal chelating agent for nitrogen oxides removal, with the production of an amine disulfonate salt, such as potassium amine disulfonate, as a purified saleable by product.

摘要翻译： 从气流中同时去除二氧化硫和氮氧化物的方法使用含有镁离子和亚硫酸根离子的吸附剂用于二氧化硫去除和用于除去氮氧化物的金属螯合剂，生产胺二磺酸盐，例如 胺二磺酸钾，作为纯化的产品。

公开(公告)号：US5481989A

公开(公告)日：1996-01-09

申请号：US294554

申请日：1994-08-23

申请人： Joel H. Beeghly ,  John C. Davis

发明人： Joel H. Beeghly ,  John C. Davis

IPC分类号： C01F11/46 ,  C04B2/06 ,  C04B18/06 ,  F23C10/24 ,  F23J3/00

CPC分类号： F23C10/24 ,  C01F11/464 ,  C04B18/061 ,  C04B2/063 ,  Y02W30/92

摘要： A method of collecting and conditioning either or both of a fluid bed combustion cyclone or bed ash, from a sulfur-containing petroleum coke combustion, by transferring dry combustion ash, containing anhydrous calcium sulfate and resultant lime to a pneumatic tanker, transferring the tanker with the ash to a storage site, and discharging the dry ash through a mixing pump onto the storage site while adding sufficient water to hydrate anhydrous calcium sulfate and resultant lime in the ash and provide about 7-25 percent by weight excess water in the ash.

摘要翻译： 通过将含有无水硫酸钙和产生的石灰的干燥燃烧灰转移到气动油罐机上，将来自含硫石油焦炭燃烧的流化床燃烧旋风分离器或床灰中的一种或两种的收集和调理方法， 将灰分通过混合泵排出到储存位置，同时加入足够的水以将灰分中的无水硫酸钙和所得的石灰混合，并在灰分中提供约7-25重量％的过量水。

公开(公告)号：US5270026A

公开(公告)日：1993-12-14

申请号：US989000

申请日：1992-12-11

申请人： John W. College ,  Lewis B. Benson

发明人： John W. College ,  Lewis B. Benson

IPC分类号： B01D53/34 ,  B01D53/50 ,  B01D53/77 ,  C01F5/22 ,  C01F11/46 ,  C01B17/00 ,  C01B17/20 ,  C01F1/00

CPC分类号： B01D53/501 ,  C01F11/464 ,  C01F5/22

摘要： A process for removing sulfur dioxide from flue gases where calcium sulfate and magnesium hydroxide are produced, with the magnesium hydroxide separated in an impure state and purified by addition of water thereto to dissolve contaminant calcium sulfate. The calcium sulfate preferentially dissolves to form an aqueous solution and purified magnesium hydroxide is separated therefrom. At least a portion of the resultant aqueous solution of calcium sulfate is returned to the wet scrubbing system as make-up water to replenish water lost from the aqueous medium during scrubbing of the flue gases.

公开(公告)号：US4996032A

公开(公告)日：1991-02-26

申请号：US454271

申请日：1989-12-21

申请人： Donald H. Stowe, Jr. ,  Lewis B. Benson

发明人： Donald H. Stowe, Jr. ,  Lewis B. Benson

IPC分类号： B01D53/50 ,  C01F5/22 ,  C01F11/46

CPC分类号： B01D53/502 ,  C01F11/464 ,  C01F5/22

摘要： A process for removing sulfur dioxide from a flue gas in a wet scrubber with an aqueous slurry formed from calcium hydroxide and magnesium hydroxide with magnesium hydroxide or magnesium oxide recovered therefrom. A thickened sludge from a thickener containing calcium sulfite solids is separated and an aqueous sulfite solution removed, with a first portion of the solution returned to the thickener while a second portion thereof is oxidized to form a sulfate solution. Lime is added to the sulfate solution to precipitate calcium sulfate and form an aqueous magnesium hydroxide suspension, with the precipitated calcium sulfate separated from the magnesium hydroxide suspension which may be dewatered to form a magnesium hydroxide product or calcined to produce magnesium oxide.

公开(公告)号：US5645807A

公开(公告)日：1997-07-08

申请号：US446959

申请日：1995-05-24

申请人： John W. College ,  Shiaw C. Tseng ,  Russell C. Forsythe

发明人： John W. College ,  Shiaw C. Tseng ,  Russell C. Forsythe

IPC分类号： B01D53/34 ,  B01D53/50 ,  B01D53/77 ,  C01F5/22 ,  C01F11/46 ,  C01B17/22 ,  C01F11/36

CPC分类号： C01F11/464 ,  B01D53/501 ,  B01D53/502 ,  C01F5/22

摘要： A wet scrubbing method for removal of sulfur dioxide from a gaseous stream uses a magnesium-enhanced lime scrubbing aqueous slurry, where a solids content in the aqueous slurry in a wet scrubbing unit is maintained at an amount of between 13 to 20 percent by weight. A bleed stream is removed from the aqueous scrubbing slurry at a pH of between 4.5-5.6 and fed to an oxidizing unit wherein calcium sulfite is oxidized to gypsum. The gypsum and residual solids in the discharge from the oxidizing unit are separated to produce a clarified solution, which is returned to the wet scrubbing unit.

摘要翻译： 用于从气流中除去二氧化硫的湿式洗涤方法使用镁增强的石灰洗涤含水浆料，其中在湿式洗涤单元中的含水浆料中的固体含量保持在13至20重量％之间的量。 在4.5-5.6的pH值下，从含水洗涤浆液中除去排出物流，并将其送入其中亚硫酸钙被氧化成石膏的氧化单元。 将来自氧化单元的排出物中的石膏和残余固体分离以产生澄清溶液，该溶液返回到湿式洗涤单元。

公开(公告)号：US5403568A

公开(公告)日：1995-04-04

申请号：US27203

申请日：1993-03-05

申请人： Donald H. Stowe, Jr.

发明人： Donald H. Stowe, Jr.

IPC分类号： B01D53/34 ,  B01D53/50 ,  B01D53/77 ,  C01B17/00

CPC分类号： B01D53/504

摘要： A horizontal wet scrubbing apparatus and method for removing sulfur dioxide from hot flue gases. The apparatus has a horizontally disposed housing through which the hot flue gases are passed, and at least one liquid injection manifold vertically disposed therein and extending to adjacent a lower wall of the housing for directing an aqueous scrubbing medium parallel to the gas flow, and a flow deflection member adjacent to, and downstream from, the manifold. Aqueous scrubbing medium is collected in reservoirs at the lower wall of the housing and recycled to the injection manifolds. The method provides for injection of aqueous scrubbing medium parallel to the flue gas flow and deflection of the gases, following the injection, by use of packing or baffles to provide intimate contact of the scrubbing medium with the gaseous stream.

摘要翻译： 一种用于从热烟道气中去除二氧化硫的卧式湿式洗涤装置和方法。 该设备具有水平设置的外壳，热烟道气通过该外壳，以及垂直设置在其中的至少一个液体喷射歧管，并延伸到邻近壳体的下壁，以引导平行于气流的水洗涤介质，以及 与歧管相邻并且在其下游的流动偏转构件。 水洗涤介质被收集在壳体下壁的储存器中，并再循环到注入歧管。 该方法提供了在喷射之后，通过使用填料或挡板来将洗涤介质平行于烟气流和气体的偏转注入，以提供洗涤介质与气流的紧密接触。

公开(公告)号：US5384111A

公开(公告)日：1995-01-24

申请号：US191413

申请日：1994-02-03

申请人： Shiaw C. Tseng ,  Daniel W. Berisko ,  Manyam Babu

发明人： Shiaw C. Tseng ,  Daniel W. Berisko ,  Manyam Babu

IPC分类号： B01D53/34 ,  B01D53/50 ,  B01D53/77 ,  C01B17/48

CPC分类号： B01D53/502

摘要： Sulfur dioxide is removed from a gaseous stream using an aqueous scrubbing medium containing calcium components and magnesium ions, so as to produce a more readily dewatered aqueous calcium sulfite-containing sludge by providing in the aqueous scrubbing medium in an aqueous scrubbing unit an effective amount of at least one amine sulfonate ion of the formula: ##STR1## where R is H or OH, and R' is H or SO.sub.3, with R and R' not both being H. The amine sulfonate ion is preferably provided by adding an amine disulfonate salt having the formula HN(SO.sub.3 X).sub.2 or a hydroxylamine monosulfonate salt having the formula HO--NH--(SO.sub.3 X), when X is an alkali or alkaline earth metal. Or an effluent stream from a scrubbing unit for nitrogen oxides containing a metal chelate and an amine sulfonate may be added to provide the amine sulfonate ion.

摘要翻译： 使用含有钙组分和镁离子的含水洗涤介质从气流中除去二氧化硫，从而通过在含水洗涤介质中在水洗涤单元中提供有效量的 至少一种下式的胺磺酸根离子，其中R是H或OH，R'是H或SO 3，其中R和R'都不是H.胺磺酸根离子优选通过加入胺二磺酸盐 具有式HN（SO3X）2的盐或具有式HO-NH-（SO3X）的羟胺单磺酸盐，当X是碱金属或碱土金属时。 或者可以加入来自洗涤单元的用于含有金属螯合物和胺磺酸盐的氮氧化物的流出物流以提供胺磺酸根离子。

公开(公告)号：US5380505A

公开(公告)日：1995-01-10

申请号：US132807

申请日：1993-10-07

申请人： John W. College

发明人： John W. College

IPC分类号： C01F11/46 ,  C04B2/10 ,  C01F11/06

CPC分类号： C04B2/108 ,  C01F11/464 ,  C01P2004/61 ,  Y02P40/42

摘要： A process for calcining limestone to lime to produce a low sulfur content lime product, while combusting a sulfur-containing carbonaceous fuel in a rotary kiln to provide heat for the calcination. A finely divided lime hydrate is added to the rotary kiln adjacent the combustion flame, such that the lime hydrate particles react with sulfur-containing contaminants in the hot combustion gases to form lime hydrate-sulfur reaction products, such as calcium sulfate, which are retained in the gaseous flow and removed from the rotary kiln.

摘要翻译： 一种将石灰石煅烧成石灰以生产低硫含量石灰产品的方法，同时在回转窑中燃烧含硫碳质燃料以提供用于煅烧的热量。 在靠近燃烧火焰的回转窑中加入细碎的石灰水合物，使得石灰水合物颗粒与热燃烧气体中的含硫污染物反应，以形成保留的石灰水合物 - 硫反应产物，例如硫酸钙 在气流中并从回转窑中取出。

公开(公告)号：US5294408A

公开(公告)日：1994-03-15

申请号：US48736

申请日：1993-04-16

申请人： Charles J. Muzik ,  Kenneth L. Yoest

发明人： Charles J. Muzik ,  Kenneth L. Yoest

IPC分类号： B01D43/00 ,  B01J19/18 ,  C04B2/08 ,  B01F7/16 ,  B01J8/08 ,  B07B1/20

CPC分类号： B01J19/18 ,  B01D43/00 ,  C04B2/08 ,  B01J2219/00051 ,  B01J2219/185

摘要： A compact lime slaker has an inner vessel forming an initial slaking chamber disposed in an outer vessel forming a final slaking chamber, with agitators provided In both chambers. Slaked lime from the final slaking chamber is pumped to a collection trough where slaked lime and grit are removed therefrom, while a major portion of slaked lime, with grit removed is returned to the final slaking chamber. The slaked lime in the final slaking chamber, at an elevated temperature due to the slaking exotherm, insulates the lime being slaked in the initial slaking chamber and provides heat thereto to aid in the initial slaking. Removal of grit from the portion of slaked lime recycled to the final slaking chamber prevents clogging or attrition of components of the slaker.

摘要翻译： 紧凑的石灰碎片具有形成初始消化室的内部容器，其设置在形成最终消化室的外部容器中，在两个室中设置搅拌器。 将来自最终消化室的熟石灰泵送到收集槽，其中从其中除去熟石灰和砂砾，同时将除去粗粒料的大部分熟石灰返回到最终的消化室。 在最终消化室中的消化石灰在升高的温度下，由于减温而使原料中的石灰绝缘，并向其提供热量以帮助初始消化。 将从已回收的熟石灰的部分去除砂粒，以防止堵塞部件的堵塞或磨损。