Method for the simultaneous modernization of a plant for ammonia production and a plant for urea production
    8.
    发明授权
    Method for the simultaneous modernization of a plant for ammonia production and a plant for urea production 有权
    用于氨生产工厂同时现代化的方法和用于生产尿素的设备

    公开(公告)号:US06340451B1

    公开(公告)日:2002-01-22

    申请号:US09538971

    申请日:2000-03-31

    IPC分类号: C01C104

    摘要: A method for the simultaneous modernization of a plant for ammonia synthesis and a plant for urea synthesis, provides—inter alia—the arrangement of a carbamate synthesis section and a carbamate decomposition section, in order to obtain a predetermined amount of carbamate in aqueous solution and of hydrogen and nitrogen in gaseous phase which are fed to the existing sections for urea synthesis, respectively ammonia synthesis. Thanks to this method of modernization it is possible to remarkably increase the production capacity and at the same time to reduce the energy consumption of the urea and ammonia plants without being forced to replace or anyway overload the existing sections of decarbonation, methanation and compression, in general.

    摘要翻译: 用于氨合成设备的同时现代化的方法和用于尿素合成的设备的方法尤其提供氨基甲酸酯合成段和氨基甲酸酯分解段的排列,以便在水溶液中获得预定量的氨基甲酸酯, 的氢气和氮气,分别送入现有的尿素合成段,分别为氨合成。 由于这种现代化方法,可以显着提高生产能力,同时可以降低尿素和氨厂的能源消耗,而不会被迫更换或反过来现有的脱碳,甲烷化和压缩部分, 一般。

    Integrated production of ammonia and urea
    9.
    发明授权
    Integrated production of ammonia and urea 失效
    综合生产氨和尿素

    公开(公告)号:US4690812A

    公开(公告)日:1987-09-01

    申请号:US692563

    申请日:1985-01-18

    CPC分类号: C07C273/10

    摘要: The combined production of ammonia and urea by the reaction of gases containing hydrocarbons with steam is conducted by using a steam reformer, downstream secondary reformer, and shift converter. The ammonia synthesis gas (hydrogen, nitrogen and carbon dioxide) is subjected to a high pressure scrubbing step with a physical solvent, to remove the acid impurities, especially CO.sub.2. The pressure on the loaded solvent is reduced to a first intermediate pressure for degasing of the coabsorbed inerts and then to a second intermediate pressure for removal of the bulk of the absorbed CO.sub.2, which is then used for urea synthesis. To remove residual CO.sub.2, the solvent is stripped with air and the resultant air stream containing the stripped residual CO.sub.2 is fed to the secondary reformer.

    摘要翻译: 通过使用蒸汽重整器,下游次级重整器和换档转换器,通过含有烃与气体的气体的反应将氨和尿素合并生产。 将氨合成气(氢气,氮气和二氧化碳)用物理溶剂进行高压洗涤,除去酸性杂质,特别是二氧化碳。 负载溶剂上的压力降低到第一中间压力,用于对吸附的惰性气体进行脱气,然后降低到第二中间压力,以除去大部分吸收的CO 2,然后将其用于尿素合成。 为了除去残留的CO 2,用空气汽提溶剂,将含有汽提残余CO 2的所得空气流送入二次重整器。

    Flexible integrated method for the production of ammonia and urea
    10.
    发明授权
    Flexible integrated method for the production of ammonia and urea 失效
    灵活的氨和尿素生产方法

    公开(公告)号:US4320103A

    公开(公告)日:1982-03-16

    申请号:US184175

    申请日:1980-09-04

    申请人: Giorgio Pagani

    发明人: Giorgio Pagani

    摘要: In an integrated flexible installation for producing ammonia and urea, the improved method which consists in that a portion of the gaseous stream comprising carbon dioxide, hydrogen and nitrogen is fed to a complementary decarbonation area and then admixed with a portion of a similar, but non-decarbonated stream of gas prior to entering the carbon-dioxide-absorption unit. Liquid ammonia is recovered from a portion of the ammoniated aqueous solution used for abating the ammonia and sent to a distillation column to recover liquid ammonia therefrom.

    摘要翻译: 在用于生产氨和尿素的集成柔性装置中,改进的方法包括将包含二氧化碳,氢气和氮气的气流的一部分进料到互补脱碳区域,然后与一部分类似但非非 - 在进入二氧化碳 - 吸收单元之前的气体流。 从用于减轻氨的氨化水溶液的一部分回收液氨,并送入蒸馏塔以从其中回收液态氨。