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1. 发明授权

US09708250B2 Process and plant for ammonia-urea production 有权
公开(公告)号：US09708250B2
公开(公告)日：2017-07-18
申请号：US14007100
申请日：2012-02-10
申请人： Ermanno Filippi , Marco Badano , Federico Zardi , Andrea Scotto
发明人： Ermanno Filippi , Marco Badano , Federico Zardi , Andrea Scotto
IPC分类号： C07C273/10 , C01C1/04
CPC分类号： C07C273/10 , C01C1/0488 , Y02P20/52 , C07C275/02
摘要： A process for ammonia-urea production where: liquid ammonia produced in an ammonia section is fed to a urea section directly at the ammonia synthesis pressure, and where the liquid ammonia is purified at high pressure with the steps of: cooling the liquid ammonia (20) obtaining a cooled liquid ammonia stream (21), separating a gaseous fraction (22) comprising hydrogen and nitrogen from said cooled liquid ammonia, obtaining purified liquid ammonia (23) at a high pressure, and reheating said purified liquid ammonia (23) after separation of said gaseous fraction, obtaining a reheated purified ammonia (24) having a temperature suitable for feeding to the urea synthesis process. The application also deals with an ammonia-urea plant comprising an ammonia cooler, a liquid-gas separator and an ammonia re-heater and with a method for revamping existing ammonia-urea plants.

2. 发明申请

US20140018575A1 Process and Plant for Ammonia-Urea Production 有权
标题翻译：氨 - 尿素生产过程和工厂
公开(公告)号：US20140018575A1
公开(公告)日：2014-01-16
申请号：US14007100
申请日：2012-02-10
申请人： Ermanno Filippi , Marco Badano , Frederico Zardi , Andrea Scotto
发明人： Ermanno Filippi , Marco Badano , Frederico Zardi , Andrea Scotto
IPC分类号： C07C273/10
CPC分类号： C07C273/10 , C01C1/0488 , Y02P20/52 , C07C275/02
摘要： A process for ammonia -urea production where: liquid ammonia produced in an ammonia section is fed to a urea section directly at the ammonia synthesis pressure, and where the liquid ammonia is purified at high pressure with the steps of: cooling the liquid ammonia (20) obtaining a cooled liquid ammonia stream (21), separating a gaseous fraction (22) comprising hydrogen and nitrogen from said cooled liquid ammonia, obtaining purified liquid ammonia (23) at a high pressure, and reheating said purified liquid ammonia (23) after separation of said gaseous fraction, obtaining a reheated purified ammonia (24) having a temperature suitable for feeding to the urea synthesis process. The application also deals with an ammonia -urea plant comprising an ammonia cooler, a liquid-gas separator and an ammonia re-heater and with a method for revamping existing ammonia -urea plants.
摘要翻译：一种氨 - 脲生产方法，其中在氨段产生的液氨直接以氨合成压力供给到尿素部分，并且液氨在高压下被纯化，其步骤是：冷却液氨（20 获得冷却的液氨流（21），从所述冷却的液氨中分离包含氢和氮的气态馏分（22），在高压下获得纯化液氨（23），并在分离所述气态馏分，获得具有适于供给到尿素合成方法的温度的再加热的纯化氨（24）。本申请还涉及一种氨脲装置，其包括氨冷却器，液气分离器和氨再加热器以及用于改造现有氨 - 脲装置的方法。

3. 发明申请

US20110306791A1 IMPROVEMENT TO THE HIGH-PRESSURE LOOP IN A PROCESS FOR SYNTHESIS OF UREA 有权
标题翻译：改进乌拉圭合成工艺中的高压环路
公开(公告)号：US20110306791A1
公开(公告)日：2011-12-15
申请号：US13140286
申请日：2009-11-17
申请人： Federico Zardi , Andrea Scotto
发明人： Federico Zardi , Andrea Scotto
IPC分类号： C07C273/04 , B01J8/00
CPC分类号： C07C273/04 , B01D19/0015 , B01J2219/00006 , B01J2219/00024 , B01J2219/00108 , Y02P20/142
摘要： A process and a related plant layout for producing urea are disclosed, wherein the high-pressure loop (1) comprises a synthesis reactor (2), a thermal stripper (3), a condenser (4), and an adiabatic CO2 stripper (10) disposed upstream said thermal stripper, separating a vapour phase (13) containing ammonia from the urea solution (9) discharged from the reactor, and recycling said vapour phase to the reactor. The adiabatic stripper (10) can be incorporated in a reactor (200) having a top reaction zone and a bottom diabatic stripping zone. A revamping method for a conventional urea plant in accordance with the inventive process is also disclosed.
摘要翻译：公开了一种用于生产尿素的方法和相关工厂布局，其中高压回路（1）包括合成反应器（2），热汽提器（3），冷凝器（4）和绝热CO 2汽提器（10 ），设置在所述热汽提器的上游，从从反应器排出的尿素溶液（9）中分离含有氨的气相（13），并将所述气相再循环到反应器。绝热汽提塔（10）可以结合在具有顶部反应区和底部绝热剥离区的反应器（200）中。还公开了根据本发明方法的常规尿素装置的改进方法。

4. 发明申请

US20090292140A1 Method for the Modernization of a Urea Production Plant 有权
标题翻译：尿素生产厂现代化的方法
公开(公告)号：US20090292140A1
公开(公告)日：2009-11-26
申请号：US12464518
申请日：2009-05-12
申请人： Federico Zardi , Andrea Scotto
发明人： Federico Zardi , Andrea Scotto
IPC分类号： C07C273/04 , B01J10/00 , B01J19/00
CPC分类号： C07C273/04 , B01J2219/00024
摘要： A method for revamping a conventional self-stripping urea plant is disclosed, where a minor portion (18a) of the carbon dioxide feed is fed to the stripper (7) and used as a stripping agent. In further embodiments, another carbamate condenser is installed, or the conventional horizontal shell-and-tube carbamate condenser (6) is replaced with a vertical submerged unit.
摘要翻译：公开了一种用于改进常规自剥式尿素装置的方法，其中将二氧化碳进料的少部分（18a）进料到汽提器（7）并用作汽提剂。在另外的实施方案中，安装了另一种氨基甲酸酯冷凝器，或者将常规的水平管壳氨基甲酸酯冷凝器（6）替换为垂直浸没的单元。

5. 发明授权

US08158823B2 Method for the modernization of a urea production plant 有权
标题翻译：尿素生产设备现代化的方法
公开(公告)号：US08158823B2
公开(公告)日：2012-04-17
申请号：US12464518
申请日：2009-05-12
申请人： Federico Zardi , Andrea Scotto
发明人： Federico Zardi , Andrea Scotto
IPC分类号： C07C273/00
CPC分类号： C07C273/04 , B01J2219/00024
摘要： A method for revamping a conventional self-stripping urea plant is disclosed, where a minor portion (18a) of the carbon dioxide feed is fed to the stripper (7) and used as a stripping agent. In further embodiments, another carbamate condenser is installed, or the conventional horizontal shell-and-tube carbamate condenser (6) is replaced with a vertical submerged unit.
摘要翻译：公开了一种用于改进常规自剥式尿素装置的方法，其中将二氧化碳进料的少部分（18a）进料到汽提器（7）并用作汽提剂。在另外的实施方案中，安装了另一种氨基甲酸酯冷凝器，或者将常规的水平管壳氨基甲酸酯冷凝器（6）替换为垂直浸没的单元。

6. 发明授权

US08129565B2 High-pressure loop in a process for synthesis of urea 有权
标题翻译：尿素合成过程中的高压回路
公开(公告)号：US08129565B2
公开(公告)日：2012-03-06
申请号：US13140286
申请日：2009-11-17
申请人： Federico Zardi , Andrea Scotto
发明人： Federico Zardi , Andrea Scotto
IPC分类号： C07C273/04
CPC分类号： C07C273/04 , B01D19/0015 , B01J2219/00006 , B01J2219/00024 , B01J2219/00108 , Y02P20/142
摘要： A process and a related plant layout for producing urea are disclosed, wherein the high-pressure loop (1) comprises a synthesis reactor (2), a thermal stripper (3), a condenser (4), and an adiabatic CO2 stripper (10) disposed upstream said thermal stripper, separating a vapour phase (13) containing ammonia from the urea solution (9) discharged from the reactor, and recycling said vapour phase to the reactor. The adiabatic stripper (10) can be incorporated in a reactor (200) having a top reaction zone and a bottom adiabatic stripping zone. A revamping method for a conventional urea plant in accordance with the inventive process is also disclosed.
摘要翻译：公开了一种用于生产尿素的方法和相关工厂布局，其中高压回路（1）包括合成反应器（2），热汽提器（3），冷凝器（4）和绝热CO 2汽提器（10 ），设置在所述热汽提器的上游，从从反应器排出的尿素溶液（9）中分离含有氨的气相（13），并将所述气相再循环到反应器。绝热汽提塔（10）可以结合在具有顶部反应区和底部绝热汽提区的反应器（200）中。还公开了根据本发明方法的常规尿素装置的改进方法。

7. 发明申请

US20120296120A1 Falling-Film Stripper for Carbamate Decomposition 审中-公开
标题翻译：用于氨基甲酸酯分解的降膜剥离器
公开(公告)号：US20120296120A1
公开(公告)日：2012-11-22
申请号：US13519275
申请日：2011-01-21
申请人： Andrea Scotto , Damiano Visciotti
发明人： Andrea Scotto , Damiano Visciotti
IPC分类号： C07C273/16 , C07C273/10 , B23P6/00
CPC分类号： B01D1/06 , B01D1/14 , B01D3/008 , B01D3/04 , C07C273/04 , Y02P20/142 , Y10T29/49718
摘要： A stripper (SN) for carbamate decomposition and ammonia plus carbon dioxide recovery from a urea solution (U) is realized with a shell-and-tube heat exchanger, where a liquid falling film of urea solution and a counter-current gaseous flow of a stripping medium fed to a bundle of surface-heated tubes (6); the stripping medium such as carbon dioxide is distributed into the tubes (6) by a plurality of gas risers (32); the gas risers are preferably associated to a perforated tray (30) in the bottom chamber (11) of the stripper. Revamping of a conventional CO2 stripper is also disclosed.
摘要翻译：用管式热交换器实现氨基甲酸酯分解的脱气剂（SN）和尿素溶液（U）中的氨加二氧化碳回收，其中尿素溶液的液体降膜和逆流气流进料到一束表面加热管（6）的汽提介质; 诸如二氧化碳的汽提介质通过多个气体提升管（32）分配到管（6）中; 气体提升管优选地与剥离器的底部室（11）中的多孔板（30）相关联。还公开了常规二氧化碳汽提器的改造。

8. 发明授权

US07712517B2 Tube bundle apparatus for processing corrosive fluids 有权
标题翻译：用于处理腐蚀性液体的管束装置
公开(公告)号：US07712517B2
公开(公告)日：2010-05-11
申请号：US10512074
申请日：2003-05-09
申请人： Giorgio Gandolfi , Giuseppe Merelli , Andrea Scotto , Gian Pietro Testa
发明人： Giorgio Gandolfi , Giuseppe Merelli , Andrea Scotto , Gian Pietro Testa
IPC分类号： B01D19/02 , F28F19/06
CPC分类号： B01J19/02 , B01J19/2425 , B01J2219/00024 , B01J2219/0236 , F28D3/02 , F28F19/06
摘要： A tube bundle apparatus for thermal exchange operations at high pressures and temperatures, under conditions of high aggressiveness of process fluids. The tube bundle includes a series of tubes whose internal wall includes a material selected from titanium, zirconium, or an alloy thereof, resistant to aggression of fluids, in which at least one of access chambers to the tube bundle is delimited by a wall including at least the following three metallic layers in succession: a) an external layer for tolerating pressure load, subject to corrosion by contact with the highly aggressive process fluid; b) an intermediate layer of stainless steel; (c) an anticorrosive lining in contact with the highly corrosive fluid, of a material selected from titanium, zirconium, or an alloy thereof. The apparatus can be particularly used as an exchanger/reactor, for example as a stripper, in the high pressure cycle of synthesis processes of urea.
摘要翻译：一种管束装置，用于在高压和高温下，在过程流体的高侵蚀性条件下进行热交换操作。管束包括一系列管，其内壁包括选自钛，锆或其合金的材料，其耐流体侵蚀，其中管束的至少一个进入室由包括在管至少以下三个金属层：a）用于耐受压力负荷的外部层，通过与高侵蚀性过程流体接触而受到腐蚀; b）不锈钢中间层; （c）与高腐蚀性流体接触的防锈衬里，其选自钛，锆或其合金。在尿素的合成过程的高压循环中，该装置可以特别用作交换器/反应器，例如作为汽提塔。

9. 发明申请

US20060032620A1 Tube bundle apparatus for processing corrosive fluids 有权
标题翻译：用于处理腐蚀性液体的管束装置
公开(公告)号：US20060032620A1
公开(公告)日：2006-02-16
申请号：US10512074
申请日：2003-05-09
申请人： Giorgio Gandolfi , Giuseppe Merelli , Andrea Scotto , Gian Pietro Testa
发明人： Giorgio Gandolfi , Giuseppe Merelli , Andrea Scotto , Gian Pietro Testa
IPC分类号： F28F19/02
CPC分类号： B01J19/02 , B01J19/2425 , B01J2219/00024 , B01J2219/0236 , F28D3/02 , F28F19/06
摘要： A tube bundle apparatus for thermal exchange operations at high pressures and temperatures, under conditions of high aggressiveness of process fluids. The tube bundle includes a series of tubes whose internal wall includes a material selected from titanium, zirconium, or an alloy thereof, resistant to aggression of fluids, in which at least one of access chambers to the tube bundle is delimited by a wall including at least the following three metallic layers in succession: a) an external layer for tolerating pressure load, subject to corrosion by contact with the highly aggressive process fluid; b) an intermediate layer of stainless steel; (c) an anticorrosive lining in contact with the highly corrosive fluid, of a material selected from titanium, zirconium, or an alloy thereof. The apparatus can be particularly used as an exchanger/reactor, for example as a stripper, in the high pressure cycle of synthesis processes of urea.
摘要翻译：一种管束装置，用于在高压和高温下，在过程流体的高侵蚀性条件下进行热交换操作。管束包括一系列管，其内壁包括选自钛，锆或其合金的材料，其耐流体侵蚀，其中管束的至少一个进入室由包括在管至少以下三个金属层：a）用于耐受压力负荷的外部层，通过与高侵蚀性过程流体接触而受到腐蚀; b）不锈钢中间层; （c）与高腐蚀性流体接触的防锈衬里，其选自钛，锆或其合金。在尿素的合成过程的高压循环中，该装置可以特别用作交换器/反应器，例如作为汽提塔。

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