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公开(公告)号：US06761868B2
公开(公告)日：2004-07-13
申请号：US09951287
申请日：2001-09-12
IPC分类号： C01C108
摘要： Processes and apparatus for quantitatively converting urea to ammonia on demand are disclosed. One process includes the steps of: receiving a demand rate signal for ammonia; feeding reactants including urea and water into a reactor to provide a reaction mixture; and controlling temperature and pressure in the reactor to produce a gaseous product stream including ammonia and carbon dioxide at substantially constant concentrations. Another process includes the steps of: feeding molten urea or solid urea to a reactor; feeding water (liquid or steam) to the reactor; and reacting the urea and water at elevated temperature and pressure to form a gaseous product stream including ammonia and carbon dioxide.
摘要翻译： 公开了将尿素定量转化成氨的方法和装置。 一个过程包括以下步骤：接收氨的需求速率信号; 将包括尿素和水的反应物进料到反应器中以提供反应混合物; 并控制反应器中的温度和压力以产生基本恒定浓度的包含氨和二氧化碳的气态产物流。 另一种方法包括以下步骤：将熔融的尿素或固体尿素送入反应器; 将水（液体或蒸汽）送入反应器; 并在升高的温度和压力下使尿素和水反应形成包含氨和二氧化碳的气态产物流。
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公开(公告)号：US06511644B1
公开(公告)日：2003-01-28
申请号：US09708897
申请日：2000-11-08
IPC分类号： C01C108
CPC分类号： B01D19/02 , B01D21/2433 , B01D21/2488 , B01D21/26 , B01D21/262 , B01J7/02 , B01J8/20 , B01J19/02 , B01J2208/00061 , B01J2208/00079 , B01J2219/00051 , B01J2219/00182 , C01C1/086
摘要： The invention provides a method and apparatus for maintaining the operation of reactors by removing contaminant matter arising from the solid reactant(s) used as a feedstock in such systems, by either intermittent or continuous means.
摘要翻译： 本发明提供一种用于通过以间歇或连续方式去除在这种系统中用作原料的固体反应物产生的污染物质来维持反应器操作的方法和装置。
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3.发明授权Process and apparatus for quantitatively converting urea to ammonia on demand 有权根据需要定量地将尿素转化为氨的方法和设备公开(公告)号：US07008603B2
公开(公告)日：2006-03-07
申请号：US11121275
申请日：2005-05-03
摘要： Processes and apparatus for quantitatively converting urea to ammonia on demand are disclosed. One process includes the steps of: receiving a demand rate signal for ammonia; feeding reactants including urea and water into a reactor to provide a reaction mixture; and controlling temperature and pressure in the reactor to produce a gaseous product stream including ammonia and carbon dioxide at substantially constant concentrations. Another process includes the steps of: feeding molten urea or solid urea to a reactor; feeding water (liquid or steam) to the reactor; and reacting the urea and water at elevated temperature and pressure to form a gaseous product stream including ammonia and carbon dioxide.
摘要翻译： 公开了将尿素定量转化成氨的方法和装置。 一个过程包括以下步骤：接收氨的需求速率信号; 将包括尿素和水的反应物进料到反应器中以提供反应混合物; 并控制反应器中的温度和压力以产生基本恒定浓度的包含氨和二氧化碳的气态产物流。 另一种方法包括以下步骤：将熔融的尿素或固体尿素送入反应器; 将水（液体或蒸汽）送入反应器; 并在升高的温度和压力下使尿素和水反应形成包含氨和二氧化碳的气态产物流。
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公开(公告)号：US06887449B2
公开(公告)日：2005-05-03
申请号：US10302531
申请日：2002-11-21
摘要： Methods and apparatus for continuously, quantitatively producing gaseous ammonia from urea, including the steps of: dissolving urea in water to form concentrated aqueous urea comprising at least 77 wt. % urea; continuously feeding the concentrated aqueous urea into a reactor; continuously feeding a separate, additional supply water into the reactor to form an aqueous urea reaction mixture; heating the aqueous urea reaction mixture; and continuously withdrawing a gas phase product including ammonia from the reactor, is disclosed. Also disclosed are methods and apparatus for continuous and batchwise dissolution of urea to form aqueous urea solutions.
摘要翻译： 用于从尿素连续定量生产气态氨的方法和装置，包括以下步骤：将尿素溶解在水中以形成浓缩的含水尿素，其包含至少77wt。 ％尿素 将浓缩的尿素水连续地进料到反应器中; 连续地向反应器中加入单独的另外的供水以形成尿素水反应混合物; 加热尿素水反应混合物; 并且从反应器中连续地抽出含有氨的气相产物。 还公开了用于尿素连续和分批溶解以形成尿素水溶液的方法和装置。
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5.发明授权
公开(公告)号：US6058623A
公开(公告)日：2000-05-09
申请号：US32303
申请日：1998-02-27
IPC分类号： B01D1/14 , B01D1/10 , B01D1/28 , B01D3/06 , C11D11/00 , C11D11/02 , C11D17/08 , F26B3/00 , F26B7/00 , F26B17/16 , F26B3/08
CPC分类号： C11D11/0082 , B01D1/10 , B01D3/06 , C11D11/0094 , F26B17/16 , F26B7/00
摘要： Apparatus and processes for removing volatile components from a composition utilize a dryer having an inlet chamber and a plurality of channels. A flow restriction is disposed immediately upstream of the inlet of each channel with respect to a direction of flow of the composition through the dryer. The process includes the step of heating the composition at a location upstream of the flow restriction to a temperature above the flashing temperature of at least one of the components at a pressure of the channel inlet and applying a pressure to the heated composition to avoid such flashing. The process further includes the step of passing the pressurized, heated composition through the dryer inlet chamber, the flow restriction, and through the channels.
摘要翻译： 用于从组合物中除去挥发性组分的装置和方法利用具有入口室和多个通道的干燥器。 相对于组合物通过干燥器的流动方向，在每个通道的入口的紧邻上游设置有流动限制。 该方法包括在通道入口的压力下将组合物在流动限制器上游的位置加热到高于至少一种组分的闪蒸温度的温度的步骤，并向加热的组合物施加压力以避免这种闪烁 。 该方法还包括使加压的加热组合物通过干燥器入口室，流动限制和通过通道的步骤。
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公开(公告)号：US06572835B1
公开(公告)日：2003-06-03
申请号：US08786756
申请日：1997-01-24
IPC分类号： C01B1769
摘要： An apparatus and method for producing sulfur comprises a vessel containing a plurality of spaced-apart channels each having an upstream end communicating with an upstream manifold and a downstream end communicating with a downstream manifold. Each channel comprises a single, continuous, uninterrupted conversion stage terminating at the downstream channel end. A first mixture, of SO2 and air from the sulfur burner, is introduced into the upstream manifold and flows as a stream through each of the channels where the stream is cooled and the SO2 is converted in the conversion stage to SO3 to produce, at the downstream channel end, a second mixture consisting essentially of SO3 and air. The first mixture is not cooled between the sulfur burner and the converter. The stream flowing through the conversion stage is maintained at a temperature which sustains conversion of SO2 to SO3, without diluting the stream with a cooling fluid or diverting the stream outside the channel contained in the converter vessel.
摘要翻译： 用于生产硫的设备和方法包括容器，其容纳多个间隔开的通道，每个通道具有与上游歧管连通的上游端和与下游歧管连通的下游端。 每个通道包括在下游通道端终止的单个连续的不间断转换级。 将来自硫燃烧器的SO 2和空气的第一混合物引入上游歧管中，并以流通过每个通道流动，其中流被冷却并且SO 2在转化阶段转化为SO 3以在 下游通道末端，基本上由SO 3和空气组成的第二混合物。 第一混合物在硫燃烧器和转炉之间没有冷却。 流过转化级的流保持在维持SO 2转化为SO 3的温度，而不用冷却流体稀释流或将流转移到包含在转化器容器中的通道外。
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