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    • 6. 发明授权
    • Production of nitric acid
    • 生产硝酸
    • US4042339A
    • 1977-08-16
    • US576123
    • 1975-05-09
    • Geoffrey Gordon HaseldenDouglas Handley
    • Geoffrey Gordon HaseldenDouglas Handley
    • B01J12/00C01B21/26C01B21/30C01B21/40B01J7/00F23L15/02F28D17/02
    • C01B21/26C01B21/40Y02P20/133
    • A process and plant is provided for the production of nitric acid from atmospheric air in which the feed air is passed in succession through a number of stages each comprising a high temperature regenerative nitrogen fixation reactor followed by a catalytic oxidation reactor and a nitric oxide absorber, all operating at superatmospheric pressure. Heat is exchanged between the inlet and outlet gas streams of each stage absorber. The compressors are driven by a turbo-expander powered by the exit gas stream in which fuel has been burned upstream of the turbo-expander. The nitrogen fixation reactors each consist of a pressure vessel enclosing a gas-permeable refractory wall surrounding a furnace chamber in which fuel is burned, the interior of the vessel being divided into two sections by an impermeable wall with a gap for flow through in the furnace zone.
    • 提供了一种工艺和设备,用于从大气中生产硝酸,其中进料空气连续通过多个阶段,每个阶段各自包含高温再生氮固定反应器,随后是催化氧化反应器和一氧化氮吸收器, 所有这些都在超大气压下工作。 在每个级吸收器的入口和出口气流之间交换热量。 压缩机由涡轮膨胀机驱动,该涡轮膨胀机由其中燃料已经在涡轮膨胀机上游燃烧的出口气流供电。 氮固定反应器各自包括一个压力容器,该压力容器围绕着燃烧燃料的炉室周围的气体可渗透的耐火壁,容器的内部被不可渗透的壁分成两部分,所述不透水壁具有用于在炉中流过的间隙 区。