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公开(公告)号：US07625537B2
公开(公告)日：2009-12-01
申请号：US11451745
申请日：2006-06-12
CPC分类号： B01D53/505 , B01D53/10 , B01D53/64
摘要： A process and system for removing sulfur oxide, other gases, and particulate from a flue gas. The process includes treating flue gas with a slurry formed from water, an alkaline reagent, and the purge stream from a wet scrubber in a spray dryer, thereby producing a dry by-product. The process further includes filtering the flue gas to remove at least a portion of the dry by-product, wet scrubbing the flue gas exiting the filter in a wet scrubber, adding a lime or limestone reagent to the wet scrubber, and producing gypsum. Activated carbon may be injected into the flue gas upstream of the filtering step and particulate may be removed from the flue gas upstream of the spray dryer.
摘要翻译： 用于从烟道气中除去硫氧化物，其它气体和颗粒的方法和系统。 该方法包括用喷雾干燥器中的由水，碱性试剂和来自湿式洗涤器的清洗流形成的浆料处理烟道气，从而产生干燥的副产物。 该方法还包括过滤烟道气以除去干燥副产物的至少一部分，湿法洗涤在湿式洗涤器中离开过滤器的烟道气，向灰尘洗涤器中加入石灰或石灰石试剂，并生产石膏。 活性炭可以被注入到过滤步骤上游的烟道气中，并且可以从喷雾干燥器上游的烟道气中除去微粒。
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2.发明授权公开(公告)号：US06638342B2
公开(公告)日：2003-10-28
申请号：US09996201
申请日：2001-11-28
IPC分类号： B01D5314
CPC分类号： C05G3/0064 , B01D53/502 , C01C1/24 , C05C3/00
摘要： A process and system for producing fertilizers with reduced levels of contaminants, and particularly a flue gas scrubbing process and facility that produce a fertilizer byproduct which is treated to remove heavy metals originally present in the scrubbed flue gas. The process entails contacting a flue gas with a scrubbing solution to remove acidic gases and produce a byproduct containing a fertilizer compound precipitate and dissolved metals and/or metal compounds. A fertilizer solution containing dissolved fertilizer and dissolved metals and/or metal compounds is then produced by adding water to the byproduct, after which the pH of the fertilizer solution is adjusted one or more times with a gaseous and/or liquid alkali to form precipitates of one or more metal species. The precipitates are then removed from the fertilizer solution and the solution dewatered to yield a fertilizer product with lower contaminant levels.
摘要翻译： 用于生产具有降低的污染物水平的肥料的方法和系统，特别是烟道气洗涤过程和设施，其产生肥料副产物，其被处理以除去最初存在于洗涤烟道气中的重金属。 该方法需要使烟气与洗涤溶液接触以除去酸性气体并产生含有肥料化合物沉淀物和溶解的金属和/或金属化合物的副产物。 然后通过向副产物中加入水来生产含有溶解的肥料和溶解的金属和/或金属化合物的肥料溶液，之后用气态和/或液态碱调节肥料溶液的pH一次或多次以形成沉淀物 一种或多种金属物种。 然后从肥料溶液中除去沉淀物，并将溶液脱水以产生具有较低污染物水平的肥料产品。
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公开(公告)号：US20080044332A1
公开(公告)日：2008-02-21
申请号：US11451745
申请日：2006-06-12
CPC分类号： B01D53/505 , B01D53/10 , B01D53/64
摘要： A process and system for removing sulfur oxide, other gases, and particulate from a flue gas. The process includes treating flue gas with a slurry formed from water, an alkaline reagent, and the purge stream from a wet scrubber in a spray dryer, thereby producing a dry by-product. The process further includes filtering the flue gas to remove at least a portion of the dry by-product, wet scrubbing the flue gas exiting the filter in a wet scrubber, adding a lime or limestone reagent to the wet scrubber, and producing gypsum. Activated carbon may be injected into the flue gas upstream of the filtering step and particulate may be removed from the flue gas upstream of the spray dryer.
摘要翻译： 用于从烟道气中除去硫氧化物，其它气体和颗粒的方法和系统。 该方法包括用喷雾干燥器中的由水，碱性试剂和来自湿式洗涤器的清洗流形成的浆料处理烟道气，从而产生干燥的副产物。 该方法还包括过滤烟道气以除去干燥副产物的至少一部分，湿法洗涤在湿式洗涤器中离开过滤器的烟道气，向灰尘洗涤器中加入石灰或石灰石试剂，并生产石膏。 活性炭可以被注入到过滤步骤上游的烟道气中，并且可以从喷雾干燥器上游的烟道气中除去微粒。
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公开(公告)号：US06277343B1
公开(公告)日：2001-08-21
申请号：US09404563
申请日：1999-09-23
IPC分类号： B01D5340
CPC分类号： B01J8/26 , B01D53/40 , B01D53/504 , B01D2251/2062 , B01J8/22 , C01C1/24
摘要： An apparatus and process for removing acidic gases, such as sulfur dioxide, hydrogen chloride and hydrogen fluoride, from flue gases produced by processing operations of the type carried out in utility and industrial plants. The apparatus is generally a gas-liquid contactor whose operation uses an ammonium sulfate-containing scrubbing solution to absorb acidic gases from flue gases, and into which oxygen and ammonia are then injected to react with the absorbed sulfur dioxide to produce ammonium sulfate as a valuable byproduct. The oxygen and ammonia are not introduced together into the scrubbing solution, but instead are introduced sequentially and in a manner so that the oxidation first occurs in a relatively low pH solution as a result of the absorbed acidic gases. The ammonia is then added to the solution in a manner that inhibits or prevents intermixing of the ammonia with the majority of the solution, but is present in the solution when recycled for further absorption of acidic gases. This is accomplished by providing a partition within a vessel containing the scrubbing solution, so that two volumes are defined within the vessel. The portion of the solution within one of the volumes receives oxygen. The solution is then drawn into the other volume, which ammonia is introduced. By avoiding the injection of ammonia into that portion of the solution that receives oxygen, which is at a lower pH and contains lower levels of ammonium sulfite, high ammonia vapor pressure and ammonia slip are minimized. By avoiding the injection of oxygen into that portion of the solution that receives ammonia, bubbles normally present in the scrubbing solution due to the injection of oxygen are prevented from being drawn into that portion of the solution that is in the process of being recycled for further absorption of acidic gases.
摘要翻译： 用于从在公用事业和工厂中进行的类型的加工操作产生的废气中除去酸性气体如二氧化硫，氯化氢和氟化氢的装置和方法。 该设备通常是气液接触器，其操作使用含硫酸铵的洗涤溶液来吸收来自烟道气体的酸性气体，然后向其中注入氧和氨以与吸收的二氧化硫反应以产生作为有价值的硫酸铵 副产品。 氧和氨不一起引入洗涤溶液中，而是依次引入，以使氧化首先由于吸收的酸性气体而在相对低的pH溶液中发生。 然后以抑制或防止氨与大多数溶液混合的方式将氨加入到溶液中，但是当再循环用于进一步吸收酸性气体时，存在于溶液中。 这通过在容纳洗涤溶液的容器内设置隔板来实现，从而在容器内限定两个体积。 一个体积内的溶液部分接受氧气。 然后将溶液吸入另一个体积，该氨被引入。 通过避免将氨注入接收氧的溶液的部分，该溶液处于较低的pH并且含有较低含量的亚硫酸铵，氨氨蒸气压力高和氨滑移最小化。 通过避免将氧气注入到接收氨的溶液的该部分中，防止由于注入氧而通常存在于洗涤溶液中的气泡被吸入正在再循环的溶液的那部分中 吸收酸性气体。
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5.发明授权Process for controlling ammonia slip in the reduction of sulfur dioxide emission 有权在减少二氧化硫排放的过程中控制氨的流失公开(公告)号：US06187278B1
公开(公告)日：2001-02-13
申请号：US09149190
申请日：1998-09-08
IPC分类号： B01D5350
CPC分类号： B01D53/504 , B01D2251/2062
摘要： A process is provided for removing sulfur dioxide out of gases by feeding the gases into a scrubber, where they are counter-currently contacted with a descending solution containing ammonium hydroxide and ammonium sulfate so that the sulfur dioxide is sorbed into the solution containing ammonium hydroxide and ammonium sulfate and a scrubbed gas is discharged from the scrubber. The sulfur dioxide-loaded solution is collected in a sump at the bottom of the scrubber, where a mixture of ammonia and air is injected into the sulfur dioxide loaded solution so that the ammonia reacts with the sulfur dioxide to produce ammonium sulfite which is (in turn) oxidized by the air into ammonium sulfate. The mixture of air and ammonia is injected into the solution in a direction that is towards the bottom of the sump so that portions of solution containing a higher pH and higher ammonium sulfite levels than the remainder of the solution is avoided, thereby minimizing ammonia slip out of the scrubber.
摘要翻译： 提供了一种通过将气体进料到洗涤器中来除去二氧化硫的方法，其中它们与含有氢氧化铵和硫酸铵的下降溶液反向接触，使得二氧化硫被吸收到含有氢氧化铵的溶液中 硫酸铵和洗涤气体从洗涤器中排出。 将二氧化硫负载的溶液收集在洗涤器底部的贮槽中，其中将氨和空气的混合物注入装有二氧化硫的溶液中，使得氨与二氧化硫反应产生亚硫酸铵，其为（在 转）由空气氧化成硫酸铵。 将空气和氨的混合物沿着朝向集水器底部的方向注入溶液中，使得避免了含有比其余溶液更高的pH和更高的亚硫酸铵含量的溶液部分，从而最小化氨的排出 的洗涤器。
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