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    UREA SYNTHESIS REACTOR AND PROCESS
    3.
    发明申请
    UREA SYNTHESIS REACTOR AND PROCESS 审中-公开

    公开(公告)号：US20180280921A1

    公开(公告)日：2018-10-04

    申请号：US15562794

    申请日：2016-04-01

    Applicant: SAIPEM S.p.A.

    Inventor： Ugo Avagliano ,  Stefano Cicchinelli ,  Lino Carlessi

    IPC: B01J19/24 ,  C07C273/04 ,  B01J4/00

    Abstract: A urea synthesis reactor is provided that comprises a casing extending along an axis and a first and a second inlet tube inserted through respective through openings of the casing and respectively connected, inside the casing, to a light phase distributor and to a heavy phase distributor configured to feed the reactor with a light phase containing carbon dioxide and a heavy phase containing ammonia, respectively; the light phase distributor comprises one or more tubular elements extending and/or distributed over the cross-section of the reactor and about the axis and provided with intake holes spaced apart from one another, so as to distribute said light phase in a plurality of intake points distributed transversely in the reactor and about the axis.

    Process for the synthesis of urea comprising a passivation stream at the stripper bottom
    4.
    发明授权
    Process for the synthesis of urea comprising a passivation stream at the stripper bottom 有权
    合成尿素的方法，包括在汽提器底部的钝化流

    公开(公告)号：US09199926B2

    公开(公告)日：2015-12-01

    申请号：US14371144

    申请日：2013-01-09

    Applicant: SAIPEM S.p.A.

    Inventor： Lino Carlessi ,  Alessandro Gianazza

    IPC: C07C273/04 ,  B01D3/00

    CPC classification number: C07C273/04 ,  B01D3/009 ,  Y02P20/142 ,  Y02P20/582

    Abstract: A process for the direct synthesis of urea from ammonia and carbon dioxide with increased corrosion resistance, comprising, in the high-pressure synthesis section, a reaction step in a vertical reactor fed with at least one stream of fresh carbon dioxide containing a passivating agent and a decomposition-stripping step of the non-converted reagents, wherein the gas-liquid mixture collected at the head of the reactor is separated into a gaseous stream and a liquid stream fed to the tail and head of the stripper, respectively.

    Abstract translation: 一种用于从具有增加的耐腐蚀性的氨和二氧化碳直接合成尿素的方法，包括在高压合成段中在垂直反应器中的反应步骤，该反应器供应至少一种含有钝化剂的新鲜二氧化碳流和 未转化试剂的分解汽提步骤，其中在反应器头部收集的气液混合物分离成气态物流和分别送入汽提塔尾部和头部的液体流。

    INTEGRATED PROCESS AND PLANT FOR PRODUCTION OF UREA AND UAS (UREA-AMMONIUM SULPHATE) MIXTURES
    7.
    发明申请
    INTEGRATED PROCESS AND PLANT FOR PRODUCTION OF UREA AND UAS (UREA-AMMONIUM SULPHATE) MIXTURES 审中-公开

    公开(公告)号：US20190276325A1

    公开(公告)日：2019-09-12

    申请号：US16461279

    申请日：2017-11-16

    Applicant: SAIPEM S.p.A.

    Inventor： Lorenzo Bruno ,  Lino Carlessi

    IPC: C01C1/242 ,  C07C273/16 ,  B01J4/00 ,  B01D53/58 ,  B01D53/78

    Abstract: An integrated process for production of urea and urea-ammonium sulphate (“UAS”) comprises: a urea synthesis step carried out in a urea synthesis reactor; a recovery and concentration step, wherein a urea solution produced in the urea synthesis step is progressively concentrated in at least one recovery section and in a concentration section, recovering unreacted ammonia and carbon dioxide and water from said urea solution; a step of producing ammonium sulphate by reaction of sulphuric acid and ammonia in an ammonium sulphate production apparatus; a step of mixing said ammonium sulphate with concentrated urea coming from the concentration section to produce a UAS mixture; in the ammonium sulphate production step, at least a part of the ammonia is provided by at least one off-gas containing ammonia and recovered from the recovery and concentration step.

    Cross-flow heat exchanger
    8.
    发明授权
    Cross-flow heat exchanger 有权

    公开(公告)号：US11033857B2

    公开(公告)日：2021-06-15

    申请号：US16337613

    申请日：2017-09-19

    Applicant: SAIPEM S.P.A.

    Inventor： Lorenzo Bruno ,  Rosario Galati ,  Lino Carlessi

    IPC: B01D53/34 ,  B01D53/00 ,  B01D53/86 ,  F28D9/00 ,  F28D21/00 ,  F28F9/26 ,  F28F27/02

    Abstract: A counter-current cross-flow heat exchanger for heating a first gas and cooling a second gas, includes modules in fluid communication with one another, each module being positioned on a plane, the planes mutually overlapping. Conduits allow entry and exit of the first and second gases into and out of the exchanger. Each module has heat exchange plates, with heating and cooling faces. The plates are orthogonal to the module plane and parallel to define alternating heating and cooling spaces. The first gas crosses each heating space with a direction substantially parallel to the plane of each module and the second gas crosses each cooling space with a direction substantially orthogonal to the plane of each module. The cooling spaces between adjacent modules are in direct fluid communication. The heating spaces between adjacent modules are in fluid communication with one another by conduits/conveyors, creating a serpentine path.

    METHOD AND SYSTEM FOR REMOVING AMMONIA FROM A VENT GAS STREAM OF A UREA PLANT
    10.
    发明申请
    METHOD AND SYSTEM FOR REMOVING AMMONIA FROM A VENT GAS STREAM OF A UREA PLANT 审中-公开
    从尿素工厂的废气流中去除氨的方法和系统

    公开(公告)号：US20160001224A1

    公开(公告)日：2016-01-07

    申请号：US14768404

    申请日：2014-02-25

    Applicant: SAIPEM S.P.A.

    Inventor： Lino Carlessi ,  Lorenzo Bruno ,  Rosario Galati

    IPC: B01D53/58 ,  B01D53/90

    CPC classification number: B01D53/58 ,  B01D53/8634 ,  B01D53/90 ,  B01D2251/102 ,  B01D2251/11 ,  B01D2251/20 ,  B01D2257/406 ,  C07C273/04 ,  Y02A50/2346

    Abstract: A method of removing ammonia from a continuous vent gas stream of a urea plant, in particular of a medium-pressure section of a urea plant, includes a step of removing ammonia from the continuous vent gas stream of the urea plant using a controlled-combustion process including at least a first lean, oxygen-poor combustion step performed in the presence of an understoichiometric amount of oxygen acting as the sole comburent, and in a reducing atmosphere of hydrogen.

    Abstract translation: 从尿素设备，特别是尿素设备的中压段的连续排出气流中除去氨的方法包括使用受控燃烧从尿素设备的连续排出气流中除去氨的步骤 该方法包括至少在存在化学计量量的作为唯一组合物的氧的情况下以及在还原气氛中进行的第一贫，贫氧燃烧步骤。

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