Improvement to the high-pressure loop in a process for synthesis of urea
    1.
    发明公开
    Improvement to the high-pressure loop in a process for synthesis of urea 审中-公开
    Verfahren der Hochdruck-Schleife在einem Verfahren zur Harnstoffsynthese

    公开(公告)号:EP2199279A1

    公开(公告)日:2010-06-23

    申请号:EP08021875.3

    申请日:2008-12-17

    申请人: Urea Casale S.A.

    IPC分类号: C07C273/04

    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 CO 2 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),其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。 绝热汽提器(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。

    Process and plant for the production of a urea solution for use in SCR process for reduction of Nox
    2.
    发明公开
    Process and plant for the production of a urea solution for use in SCR process for reduction of Nox 审中-公开
    方法和设备的生产中使用的尿素溶液在SCR方法以减少NOx的

    公开(公告)号:EP2153880A1

    公开(公告)日:2010-02-17

    申请号:EP08013743.3

    申请日:2008-07-31

    申请人: UREA CASALE S.A.

    发明人: Zardi, Federico

    摘要: A process and a plant for the preparation of an acqueous solution of urea suitable for use in a SCR process for nitrogen oxides removal, wherein the urea solution from the recovery section of a urea plant is subject to at least one step of evaporation, separating a vapour stream containing water and ammonia, and obtaining a concentrated and substantially ammonia-free solution, and said concentrated solution is diluted to the concentration of urea suitable for use in the SCR process.

    摘要翻译: 的方法和适合于用尿素在SCR工艺的氮氧化物除去的acqueous溶液的制备的植物,worin从尿素设备的回收区的尿素溶液经受蒸发中的至少一个步骤,分离 蒸气流含有水和氨,并获得浓缩的且基本上无氨的溶液中,并且将所述浓缩的溶液稀释到适合于在SCR法的尿素的浓度。

    Integrated process for urea and melamine production
    5.
    发明公开
    Integrated process for urea and melamine production 审中-公开
    Integriertes Verfahren zur Herstellung von Harnstoff und Melamin

    公开(公告)号:EP1918274A1

    公开(公告)日:2008-05-07

    申请号:EP06022990.3

    申请日:2006-11-04

    申请人: UREA CASALE S.A.

    IPC分类号: C07C273/12

    摘要: In an integrated process for urea and melamine production, urea is produced in a urea plant (10) comprising a high pressure urea synthesis section (11) from which an aqueous solution comprising urea, ammonium carbamate and ammonia is obtained and a urea recovery section (21) operating at low pressure, and melamine is produced in a melamine plant (40) wherein off-gases resulting as by-products of the melamine synthesis are discharged from said plant at a medium pressure and recycled to the high-pressure urea synthesis section (11).

    摘要翻译: 在用于尿素和三聚氰胺生产的综合方法中,在包含高压尿素合成段(11)的尿素装置(10)中生产尿素,从其中获得包含尿素,氨基甲酸铵和氨的水溶液和尿素回收段( 21),在三聚氰胺装置(40)中产生三聚氰胺,其中作为三聚氰胺合成的副产物产生的废气在中压下从所述设备排出并再循环到高压尿素合成段 (11)。

    Carbamate condensation unit
    7.
    发明公开
    Carbamate condensation unit 审中-公开
    氨基甲酸酯冷凝装置

    公开(公告)号:EP1201298A1

    公开(公告)日:2002-05-02

    申请号:EP00123047.3

    申请日:2000-10-24

    申请人: UREA CASALE S.A.

    发明人: Zardi, Federico

    摘要: A carbamate condensation unit (1) of the submerged type for synthesis urea production plants comprising a tube bundle (5) for the condensation of gaseous compounds, is distinguished in that it further comprises a duct (19,23) structurally independent from the tube bundle (5), for the circulation of part of the condensed gaseous compounds inside the condensation unit (1).

    摘要翻译: 包括用于气态化合物冷凝的管束(5)的用于合成尿素生产设备的浸没型氨基甲酸盐冷凝单元(1)的特征在于,其还包括在结构上独立于管束(5)的管道(19,23) (5),用于冷凝单元(1)内的部分冷凝气体化合物的循环。

    Method for modernizing a urea production plant
    8.
    发明公开
    Method for modernizing a urea production plant 有权
    Verfahren zur Modernisierung einer Harnstoffanlage

    公开(公告)号:EP1036787A1

    公开(公告)日:2000-09-20

    申请号:EP99200794.8

    申请日:1999-03-16

    申请人: UREA CASALE S.A.

    IPC分类号: C07C273/04

    摘要: A method for the modernisation of a plant for urea production of the type comprising a reactor (2) for urea synthesis, a stripping unit (3) with carbon dioxide and at least one vertical condensation unit (4) of the film type, foresees the provision of means (36) for feeding a major portion of a flow comprising ammonia and carbon dioxide in vapour phase leaving the stripping unit (3) to the condensation unit (4) and the provision in said condensation unit (4) of means (37) for subjecting to substantially total condensation such major portion of the flow comprising ammonia and carbon dioxide in vapour phase, obtaining a flow comprising urea and carbamate in aqueous solution, then fed to the reactor (2) for urea synthesis. Thanks to the present method of modernisation, the efficiency of the condensation unit (4) is remarkably improved, thus permitting an increase of its capacity.

    摘要翻译: 一种用于尿素生产用于尿素生产的设备的现代化方法,包括用于尿素合成的反应器(2),具有二氧化碳的汽提单元(3)和至少一个膜类型的垂直冷凝单元(4),预期了 提供用于将气流中包含氨和二氧化碳的主要部分的气流供给到冷凝单元(4)的装置(36),并且在所述冷凝单元(4)中提供装置(37) ),使蒸气中含有氨和二氧化碳的大部分流动基本上完全冷凝,得到包含尿素和氨基甲酸酯在水溶液中的流动,然后送入反应器(2)进行尿素合成。 由于目前的现代化方法,冷凝单元(4)的效率显着提高,从而允许其容量增加。

    Process and plant for ammonia-urea production
    9.
    发明公开
    Process and plant for ammonia-urea production 审中-公开
    Verfahren und Anlage zur Ammoniak-Harnstoffherstellung

    公开(公告)号:EP2502881A1

    公开(公告)日:2012-09-26

    申请号:EP11159656.5

    申请日:2011-03-24

    申请人: Urea Casale S.A.

    IPC分类号: C01C1/04 C07C273/04

    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 - 尿素生产方法,其中:氨段产生的液氨直接以氨合成压力供给尿素部分,并且液氨在高压下被纯化,其步骤为: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体馏分(22),在高压下获得纯化的液氨(23),并且在 分离所述气体馏分,得到具有适于供给尿素合成过程的温度的再加热的纯化氨(24)。 该应用还涉及包括氨冷却器,液气分离器和氨再加热器以及用于改造现有氨 - 尿素设备的方法的氨 - 尿素设备。

    Fluid bed granulation process and apparatus
    10.
    发明公开
    Fluid bed granulation process and apparatus 审中-公开
    Verfahren und Vorrichtung zur Wirbelschichtgranulation

    公开(公告)号:EP2077147A1

    公开(公告)日:2009-07-08

    申请号:EP08000098.7

    申请日:2008-01-04

    申请人: UREA CASALE S.A.

    发明人: Zardi, Federico

    IPC分类号: B01J2/16

    CPC分类号: B05D1/24 B01J2/16 B05C19/02

    摘要: A fluid bed granulation process and apparatus, wherein a suitable fluid bed of a particulate material is maintained in a granulator (1) fed by an input flow (F) comprising a growth liquid (L) and by a flow (S1) of seeds adapted to promote the granulation, and wherein a part (F2) of said input flow (F) is taken upstream the feeding of the fluid bed, and used in a seeds generator (33), to produce the seeds for the fluid bed.

    摘要翻译: 一种流化床造粒方法和装置,其中将颗粒材料的合适的流化床保持在由包含生长液体(L)的输入流(F)和由适应的种子流(S1))供给的造粒机(1)中 以促进造粒,并且其中所述输入流(F)的部分(F2)在流体床的进料的上游被采集并用于种子发生器(33)中,以产生用于流化床的种子。