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    • 61. 发明公开
    • VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON SALPETERSÄURE
    • VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON SALPETERSEURE
    • EP2804834A1
    • 2014-11-26
    • EP12812865.9
    • 2012-12-21
    • ThyssenKrupp Industrial Solutions AG
    • BIRKE, Daniel
    • C01B21/26
    • C01B21/38B01J19/24B01J2219/00761B01J2219/24C01B21/26C01B21/40
    • The invention relates to a method for producing nitric acid from ammonia and oxygen-containing gas applying the single pressure or dual pressure process, characterized in that during the start-up and/or shut-down of the nitric acid plant, a process gas is flowing through a process gas cooler (3) and/or a feedwater preheater (2), which process gas is heated in the process gas cooler (3) and/or in the feedwater preheater (2) and is conveyed through at least one heat exchanger (5, 4) located downstream of the process gas cooler (3) and/or the feedwater preheater (2) in order to transfer thermal energy from the heated process gas to a residual gas. The invention further relates to a device for carrying out the method. By means of said methods and/or devices, a freezing of the residual gas turbine can effectively be prevented.
    • 本发明涉及一种采用单压或双压工艺从氨和含氧气体生产硝酸的方法,其特征在于,在硝酸厂的启动和/或关闭期间,工艺气体是 流过工艺气体冷却器(3)和/或给水预热器(2),该工艺气体在工艺气体冷却器(3)和/或给水预热器(2)中被加热并且通过至少一个热量 位于工艺气体冷却器(3)和/或给水预热器(2)下游的热交换器(5,4),以将热能从加热的工艺气体传递到残余气体。 本发明还涉及用于执行该方法的设备。 借助于所述方法和/或装置,可以有效地防止残余燃气轮机的冻结。
    • 62. 发明公开
    • VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON SALPETERSÄURE
    • VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VONSALPETERSÄURE
    • EP2794470A1
    • 2014-10-29
    • EP12799062.0
    • 2012-11-30
    • ThyssenKrupp Industrial Solutions AG
    • BIRKE, Daniel
    • C01B21/26
    • C01B21/38B01J7/00C01B21/26C01B21/28
    • An apparatus and a process are described for preparation of nitric acid from ammonia and oxygenous gas by the single pressure or dual pressure process, in which the oxidation of the ammonia used is accomplished by means of compressed process air which has been compressed in at least one compressor over a catalyst, and the nitrous gas formed by the oxidation is at least partly absorbed by water, forming nitric acid, and the unabsorbed residual gas is expanded for the purpose of recovering compressor work in at least one multistage residual gas turbine (1). The characteristic features of the process and the apparatus are that, at least during the startup and/or shutdown of the nitric acid plant, in the multistage residual gas turbine (1), a substream (3) of the medium (4) flowing through the multistage residual gas turbine (1) is withdrawn and that a substream (2) of the medium (4a) supplied to the multistage residual gas turbine (1) is optionally withdrawn upstream of the multistage residual gas turbine (1), and that the medium withdrawn is supplied to a chimney (5), the withdrawal of the substream (3) taking place between two or more residual gas turbine stages. This measure can effectively prevent freezing of the residual gas turbine.
    • 描述了用于通过单一压力或双重压力方法由氨和氧气制备硝酸的装置和方法,其中使用的氨的氧化通过压缩的工艺空气来完成,所述压缩过程空气在至少一个压缩过程中被压缩 压缩机在催化剂上,并且由氧化形成的亚硝气至少部分地被水吸收,形成硝酸,并且未吸收的残余气体被膨胀以便在至少一个多级残余燃气轮机(1)中回收压缩机工作, 。 该方法和设备的特征在于,至少在硝酸设备的启动和/或停止期间,在多级残余燃气轮机(1)中,介质(4)的分流器(3)流过 取出多级残余燃气轮机(1),并且提供给多级残余燃气轮机(1)的介质(4a)的子流(2)任选地从多级残余燃气轮机(1)的上游排出,并且 介质取出被供应到烟囱(5),在两个或更多个残余燃气轮机级之间发生子流(3)的抽出。 该措施可有效防止残余燃气轮机的冻结。