["["氨合成 高压氨s器 中压氨s器 温度设置",,"氨合成工艺中，，氨s器类似于闪蒸分离过程。高压氨s器底部出口为-7℃ 13.2MPa，底部流体进入中压氨s器，中压氨s器顶部出口为-4.7℃ 22.9MPa。 为什么减压后反而温度升高了？","用PR方法计算结果是升温到-4.4C 这个现象的原因不是什么氢气膨胀升温，溶解的少量气体还不至于引起整体温升，何况气体释放时还有氨的蒸发吸热 根本原因是高压液体做功引起的 高压液体具有大量的势能 通过减压阀后能量转变为热能""]

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