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1. 发明申请

WO2021110909A1 APPARATUS AND METHOD FOR PROCESSING EXHAUST GAS 审中-公开
公开(公告)号：WO2021110909A1
公开(公告)日：2021-06-10
申请号：PCT/EP2020/084616
申请日：2020-12-04
申请人： YARA INTERNATIONAL ASA
发明人： VANMARCKE, Luc , DE BAKKER, Peter
IPC分类号： B01D53/58 , B01J8/04 , C05C3/00 , C05C9/00 , C07C273/16 , B01D50/00 , B01D47/06 , B01D47/14
摘要： The present disclosure is related to a scrubber for removing dust and ammonia from a stream of gas comprising dust and ammonia. The scrubber has an essentially cylindrical shape along a central axis defined by two ends joined by a casing, comprising: (a) one gas inlet adapted to receive the stream of gas comprising dust and ammonia, located on one end of the scrubber; (b) one gas outlet adapted to exhaust a stream of gas depleted of dust and ammonia, located on the casing of the scrubber; (c) a dust filter packing and an ammonia filter packing; (d) two or more internal walls having an essentially circular or polygonal perimeter, each with a smaller diameter than the diameter of the casing, wherein: (i) the internal walls extend from one end to the other end of the scrubber, (ii) the internal walls are concentric, (iii) the gas inlet is located within the circular perimeter set by at least one of said internal walls, and (iv) each internal wall comprises two or more gas passages comprising filter packings, which filter packings can either be dust filter packings or ammonia filter packings, but not both. The present disclosure is also related to the use of a scrubber according to the present invention for the removal of dust and ammonia from a stream of gas comprising dust and ammonia. Finally, the present disclosure is also related to a method for removing dust and ammonia from a stream of gas comprising dust and ammonia.

2. 发明申请

WO2021074361A1 APPARATUS AND METHOD FOR PROCESSING EXHAUST GAS FROM A UREA PLANT 审中-公开
公开(公告)号：WO2021074361A1
公开(公告)日：2021-04-22
申请号：PCT/EP2020/079155
申请日：2020-10-16
申请人： YARA INTERNATIONAL ASA
发明人： CUELENAERE, Paul J.M. , VAN DER HAVE, Kees
IPC分类号： B01D53/14 , B01D53/18 , B01D53/58 , C01C1/12 , C07C273/16 , C05C3/00 , C05C9/00 , B01D46/00 , B01D46/10 , B01D47/06 , B01D47/14 , B01D50/00
摘要： The present invention discloses an apparatus or scrubber to remove dust, in particular urea dust, and ammonia from a stream of polluted gas. The scrubber has an elongated shape along a central axis defined by two ends joined by a casing, and comprises one gas inlet, adapted to receive the stream of polluted gas, located on the casing of the scrubber, at least one gas outlet located on either end, adapted to exhaust a stream of gas depleted of dust and ammonia, at least two dust filter packings and at least two ammonia filter packings enclosed by the casing and adapted to pass the stream of polluted gas, wherein at least one dust filter packing is located on either side of the gas inlet, and at least one ammonia filter packing is located on either side of the gas inlet.

3. 发明申请

WO2021032819A1 PREPARATION OF UREA SOLUTION AND FACILITY TO DO SO 审中-公开
公开(公告)号：WO2021032819A1
公开(公告)日：2021-02-25
申请号：PCT/EP2020/073288
申请日：2020-08-20
申请人： YARA INTERNATIONAL ASA
发明人： BYNES, Adrian , AMIN, Shreyas , VAN BELZEN, Ruud
IPC分类号： C07C273/04 , C07C273/16 , B01D3/14
摘要： The invention relates to a method for producing a urea solution with a target urea concentration using water flows recovered from the urea production process. At least part of the water flows recovered from the urea production process are only partially purified to produce the urea solution. The invention further relates to a process condensate treatment plant to implement the method for producing a urea solution with a target urea concentration, and a urea production plant comprising such process condensate treatment plant.

4. 发明申请

WO2020235999A1 TREATMENT OF OFFGAS FROM UREA FINISHING 审中-公开
公开(公告)号：WO2020235999A1
公开(公告)日：2020-11-26
申请号：PCT/NL2020/050326
申请日：2020-05-22
申请人： STAMICARBON B.V.
发明人： PUCI, Giusy Elisa , DIRKX, Wilfried Marc Renaat
IPC分类号： B01D47/05 , B01D47/06 , B01D47/10 , B01D47/12 , C07C273/16
摘要： Disclosed is a urea finishing method including an off-gas treatment, the method comprising urea finishing and supplying the off-gas to a quenching zone and to a scrub column comprising a sump and a venturi stage, wherein the sump has a split sump configuration with two compartments.

5. 发明申请

WO2018168573A1 尿素の造粒方法审中-公开
公开(公告)号：WO2018168573A1
公开(公告)日：2018-09-20
申请号：PCT/JP2018/008574
申请日：2018-03-06
申请人：東洋エンジニアリング株式会社
发明人：中村　周平 , 牛房　明子 , 佐々木　啓伍
IPC分类号： C07C273/16 , C07C275/00
摘要：尿素造粒工程から発生する尿素ダスト及びＮＨ３を含むガス中の尿素とＮＨ３を回収及び利用する際に、尿素造粒工程に供給する尿素水溶液中の水分量の増加を抑えつつアンモニウム塩の析出を防止する。原料尿素水溶液から空気を用いて粒状固体尿素を製造する造粒工程、造粒工程から排出される空気から、尿素ダスト及びＮＨ３を、酸を含む水溶液で回収して、尿素及びアンモニウム塩を含む回収液を得る回収工程、回収液よりもアンモニウム塩濃度が低い尿素水溶液を回収液に混合して、回収液中のアンモニウム塩濃度を調整する塩濃度調整工程、塩濃度調整工程から得られた液に含まれる水を蒸発させて、塩濃度調整工程から得られた液を濃縮して、濃縮回収液を得る濃縮工程、及び原料尿素水溶液に濃縮回収液を混合する混合工程を含み、濃縮回収液のアンモニウム塩濃度を７質量％以下にする尿素の造粒方法。

6. 发明申请

WO2017196167A1 SUBMICRON PARTICLE REMOVAL FROM GAS STREAMS 审中-公开
标题翻译：亚微米粒子从气体中去除
公开(公告)号：WO2017196167A1
公开(公告)日：2017-11-16
申请号：PCT/NL2017/050287
申请日：2017-05-09
申请人： STAMICARBON B.V.
发明人： HIGGINS, Brian Sayre , TATE III, John Marshall , YATES, Robert Arthur , POMERLEAU, Marcel Julien , HEON, Jon Michael , DIRKX, Wilfried Marc Renaat , COLOMA GONZÁLEZ, Juan
IPC分类号： B01D47/06 , B01D47/10 , B01D53/58 , C07C273/16 , C05C9/00
摘要： Disclosed are methods and systems for removing submicron particles from a gas stream, in particular from urea prilling off-gas, wherein a Venturi ejector is used. A method comprises contacting a gas stream containing submicron particles in a Venturi ejector with an injected high velocity scrubbing liquid to provide a pumping action, wherein the scrubbing liquid has an initial velocity of at least 2 m/s and wherein the ratio of scrubbing liquid and gas flow is between 0.0005 and 0.0015 (m³/h) / (m³/h). The disclosure also pertains to a prilling tower having a gas stream treatment system comprising a Venturi ejector at the top of the prilling tower, and to a method of modifying an existing prilling tower.
摘要翻译：公开了用于从气流，特别是尿素造粒废气中去除亚微米颗粒的方法和系统，其中使用文丘里喷射器。一种方法包括使文丘里喷射器中含有亚微米颗粒的气流与注入的高速洗涤液接触以提供泵送作用，其中洗涤液的初始速度为至少2m / s，并且其中洗涤液和气体流量在0.0005和0.0015（m3 / h）/（m3 / h）之间。本发明还涉及具有气流处理系统的造粒塔以及改造现有造粒塔的方法，所述气流处理系统包括位于造粒塔顶部的文丘里喷射器。

7. 发明申请

WO2006060602A2 PARTICLE SIZE CONTROL FOR ACETYLENIC AGENTS USEFUL IN CONDITION MONITORING SYSTEMS 审中-公开
标题翻译：在条件监测系统中有用的乙酰化剂的颗粒尺寸控制
公开(公告)号：WO2006060602A2
公开(公告)日：2006-06-08
申请号：PCT/US2005/043520
申请日：2005-12-01
申请人： TEMPTIME CORPORATION , PRUSIK, Thaddeus , SMITH, Dawn , LEUBNER, Ingo
发明人： PRUSIK, Thaddeus , SMITH, Dawn , LEUBNER, Ingo
IPC分类号： C07C273/16
CPC分类号： C07C273/189 , C07C275/20
摘要： Precipitation of polyacetylenic agents can be effected with control of a particle size parameter such as mean size or spread, by mixing a warm solution of the acetylenic agent with a cold precipitation fluid and appropriate selection of a constituent of the cold precipitation fluid and/or of the temperature conditions and collecting the precipitated acetylenic agent. Precipitation additives such as nitrocellulose or gelatin can usefully be employed. Solvents such as aqueous methanol and ethyl 3-ethoxypropionate can be useful. Polyacetylenic agents, e.g. substituted diacetylenics are useful to provide visual changes in condition-monitoring indicators such as time-temperature indicators, "TTIs", useful as freshness indicators for radiation exposure monitoring and for other purposes. Controlled, small and/or consistent particle sizes of such polyacetylenic agents are helpful in providing consistent commercial properties, especially in inks in which they may be formulated.
摘要翻译：通过将炔属试剂的温溶液与冷沉淀流体混合并适当选择冷沉淀液和/或冷沉淀液的组分，可以通过控制粒径参数如平均尺寸或扩展来实现聚乙炔化剂的沉淀温度条件并收集沉淀的炔属剂。可以有效地使用沉淀添加剂如硝酸纤维素或明胶。溶剂如甲醇水溶液和3-乙氧基丙酸乙酯是有用的。聚乙炔化剂，例如取代的二乙酰基可用于提供条件监测指标的视觉变化，例如时间 - 温度指标“TTI”，作为辐射暴露监测的新鲜度指标和用于其他目的。这种聚乙炔化剂的受控的，小的和/或一致的粒度有助于提供一致的商业性质，特别是在它们可以配制的油墨中。

8. 发明申请

WO2021156024A1 A PROCESS FOR PRODUCING LOW-BIURET UREA 审中-公开
公开(公告)号：WO2021156024A1
公开(公告)日：2021-08-12
申请号：PCT/EP2021/050475
申请日：2021-01-12
申请人： CASALE SA
发明人： MARRONE, Leonardo , BENEDETTI, Alberto , BERTINI, Paolo
IPC分类号： C07C273/04 , C07C273/16 , B01D61/02 , C02F1/44
摘要： A process for purifying a urea-containing aqueous stream, such as the aqueous stream from the recovery section of a urea plant, comprising a step of removing biuret from the urea-containing stream by reverse osmosis in one or more reverse osmosis stages.

9. 发明申请

WO2018122379A1 METHOD FOR PROCESSING A GAS STREAM COMPRISING UREA DUST AND AMMONIA 审中-公开
公开(公告)号：WO2018122379A1
公开(公告)日：2018-07-05
申请号：PCT/EP2017/084819
申请日：2017-12-29
申请人： YARA INTERNATIONAL ASA
发明人： VOLKE, Howard , VAN BELZEN, Ruud , WINNE, Erika
IPC分类号： C01C1/12 , B01J2/00 , C01C1/242 , C05C1/02 , C05C3/00 , C07C273/16
摘要： The present invention provides a method for processing a gas stream comprising urea dust and ammonia, comprising the steps of: (a) separating said ammonia from said urea dust, (b) converting said urea dust into an aqueous urea solution, (c) converting said ammonia into an aqueous ammonium sulphate solution, (d) mixing said aqueous urea solution and said aqueous ammonium sulphate solution, thereby obtaining a urea ammonium sulphate solution, and optionally, concentrating said aqueous urea solution, said aqueous ammonium sulphate solution, and/or said urea ammonium sulphate solution.

10. 发明申请

WO2018080007A1 요소수에서 탁도를 일으키는 트리우렛을 제거하는 제조 방법 审中-公开
标题翻译：一种去除尿素水导致尿素水混浊的方法
公开(公告)号：WO2018080007A1
公开(公告)日：2018-05-03
申请号：PCT/KR2017/009677
申请日：2017-09-05
申请人： 주식회사 소울테크
发明人： 신상원
IPC分类号： C07C273/16 , C07C275/02 , B01F13/08 , B01D61/14
摘要： 본 발명은 요소수에서 탁도를 일으키는 트리우렛을 제거하는 제조 방법 및 이에 따라 제조된 요소수에 관한 것으로서, 보다 상세하게는 1㎥~20㎥ 크기의 마그네틱 탱크에서 32.5%인 자동차용 요소수는 15~24℃의 초순수에 요소를 투입하고 마그네틱 믹서기를 통해 빠르게 교반한 후, 중공사형 한외여과막(Pore Size 0.01~0.3um)을 이용하여 필터링함으로써, 0.02~0.2 NTU의 탁도를 가지며 요소수에서 탁도를 일으키고 SCR에서 NH 3 로의 전환효율을 떨어뜨리는 트리우렛을 제거하는 제조 방법에 관한 것으로, 본 발명의 목적을 달성하기 위해 본 발명인 초순수에 요소를 용해하여 요소수를 제조하는 제조방법에 있어서, 자동차용 요소수 32.5%는 15~24℃의 초순수를 준비하는 단계; 상기 초순수를 마그네틱 믹서 탱크로 이동하는 단계; 마그네틱 믹서 탱크에 담긴 상기의 초순수에 요소를 투입하는 단계; 마그네틱 믹서를 작동하여 보텍스 효과를 발생시켜 상기 초순수와 요소를 교반 혼합하여 요소수 제조하는 단계; 트리우렛을 포함하는 상기의 요소수를 교반에 의해 하락한 저온상태를 유지한 채로 중공사 한외여과필터(U/F)를 통과시켜 요소수 1000리터 당 20리터의 트리우렛 및 불순물을 여과하는 단계(S5);를 포함하는 제조방법을 제공한다.
摘要翻译：去除尿素水中的浑浊物的方法技术领域本发明涉及一种去除尿素水中的浑浊物的尿素除去方法，尤其涉及从尿素水箱中除去尿素的方法，份的在用磁力搅拌器搅拌，通过使用中空纤维型超滤膜过滤NTU 0.02〜0.2（孔径0.01〜0.3um的），在15〜24℃，并迅速纯水的％数为汽车中的元素之后具有浊度根据去除树的制造方法wooret降低转换效率的NH <子> 3 在SCR引起从尿素水的浊度，在本发明的元件的超纯水以达到本发明的目的制备尿素水，其中汽车尿素的数量为32.5％; 将超纯水移至磁力搅拌槽; 将元件装入容纳在磁力搅拌槽中的超纯水中; 通过操作磁力搅拌器来搅拌超纯水和尿素以制备尿素水来产生涡流效应; 还包括：一个保持过滤中空纤维超滤过滤器（U / F）通过尿素水树wooret传递和每千升20升杂质维持低的温度，下，通过搅拌元件的数量，包括树wooret（ S5）。

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