UREA PLANT REVAMPING METHOD
    161.
    发明申请
    UREA PLANT REVAMPING METHOD 有权
    UREA植物改造方法

    公开(公告)号:US20150343409A1

    公开(公告)日:2015-12-03

    申请号:US14655680

    申请日:2013-12-27

    Abstract: Disclosed is a method of increasing the capacity of an existing urea plant. With reference to the regular components of a urea plant, including a synthesis section comprising a high pressure carbamate condenser and a reactor, and a recovery section, the method comprises installing an additional reactor between the recovery section and the high pressure carbamate condenser. The additional reactor is preferably installed in connection with an ejector, so as to allow ground placement of the additional reactor.

    Abstract translation: 公开了提高现有尿素装置的能力的方法。 关于尿素装置的常规部件,包括包含高压氨基甲酸酯冷凝器和反应器的合成部分和回收部分,该方法包括在回收部分和高压氨基甲酸铵冷凝器之间安装另外的反应器。 附加的反应器优选地与喷射器结合安装,以允许附加反应器的地面放置。

    PROCESS FOR THE REMOVAL OF CO2 FROM ACID GAS
    162.
    发明申请
    PROCESS FOR THE REMOVAL OF CO2 FROM ACID GAS 有权
    从酸气中去除二氧化碳的方法

    公开(公告)号:US20150276308A1

    公开(公告)日:2015-10-01

    申请号:US14432726

    申请日:2013-10-01

    Abstract: The invention relates to a process for the removal of CO2 from acid gas by cryogenic distillation performed in two steps. The feed mixture is first distilled at high pressure (at least 45 bar) in a first distillation column. The top product or a part thereof is then, after heating, subjected to a second distillation step at a lower pressure (lower than 45 bar). The top product of the second distillation step is methane of high purity (more than 99 mol.%). The bottom product of the second distillation step is recycled back to the first distillation column. The method according to the invention allows complete separation of methane also at higher level of acidic components, is economical and does not result in solid CO2 build-up, which is a common problem in cryogenic distillation.

    Abstract translation: 本发明涉及通过两步进行的低温蒸馏从酸性气体中除去CO 2的方法。 首先在第一蒸馏塔中高压(至少45巴)蒸馏进料混合物。 然后,顶部产品或其一部分在加热后进行较低压力(低于45巴)的第二蒸馏步骤。 第二蒸馏步骤的顶部产物是高纯度(大于99mol%)的甲烷。 第二蒸馏步骤的底部产物被循环回到第一蒸馏塔。 根据本发明的方法允许在较高水平的酸性组分中完全分离甲烷,是经济的并且不会导致固体CO 2堆积,这是在低温蒸馏中的常见问题。

    UREA FINISHING METHOD
    167.
    发明申请
    UREA FINISHING METHOD 有权
    UREA整理方法

    公开(公告)号:US20150026943A1

    公开(公告)日:2015-01-29

    申请号:US14127962

    申请日:2012-10-12

    Abstract: Disclosed is a method for urea finishing. A urea solution is subjected to crystallization and, other than in conventional processes, the urea crystals are shaped by exerting mechanical force onto them. Thus, the conventional prilling or granulation finishing steps can be avoided, and so are the corresponding emissions of ammonia and/or dust. The crystallization comprises a flash crystallization. The invention also pertains to the urea particles obtainable by the process, to a urea plant, and to a method of modifying an existing urea plant.

    Abstract translation: 公开了一种尿素整理方法。 尿素溶液进行结晶,除了常规方法之外,尿素晶体通过对其施加机械力而成形。 因此,可以避免常规的造粒或造粒整理步骤,氨和/或粉尘的相应排放也是如此。 结晶包括闪晶结晶。 本发明还涉及通过该方法获得的尿素颗粒,尿素装置以及改进现有尿素装置的方法。

    FLUIDIZED BED GRANULATION
    170.
    发明申请

    公开(公告)号:US20250108349A1

    公开(公告)日:2025-04-03

    申请号:US18850232

    申请日:2023-08-29

    Abstract: The disclosure pertains to a fluidized bed granulation process, for instance for urea melt. An embodiment of the process comprises providing a fluidized bed of the particles in a granulation compartment of the fluidized bed granulator; forming a film of the granulation liquid in the form of a hollow conical frustum projecting into the granulation compartment by supplying the granulation liquid through a first channel of a granulation nozzle; supplying secondary gas stream through a secondary gas channel of the granulation nozzle into the granulation compartment, wherein the secondary gas channel is provided as an annulus around the first channel, wherein the exit of the secondary gas channel is directly exposed to the fluidized bed in the granulation compartment, wherein particles from the fluidized bed are entrained in said secondary gas stream.

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