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本文介绍了固定喷咀透平膨胀机和可调喷咀透平膨胀机制冷量调节方法和工作原理,并讨论了两种膨胀机级内焓降、流量、绝热效率和产冷量的关系。可调喷咀透平膨胀机效率高、变工况效率曲线平坦,能最大限度地利用级的焓降,因而显著的减少送入上塔的膨胀空气量,改善空分设备精馏工况i 该机配套于国产6000Nm~3/h空分设备,经工业性对比试验表明,每小时氧产量提高200米~3,每年节电90万瓩,对改造配套机组,降低空分设备能耗具有现实意义。
In this paper, the cooling capacity adjustment method and working principle of turboexpander and adjustable nozzle turboexpander are introduced. The relationship between the enthalpy drop, flow rate, adiabatic efficiency and cooling capacity in two expander stages are discussed. Adjustable nozzle turboexpander high efficiency, variable efficiency and efficiency curve is flat, can make maximum use of level enthalpy drop, thus significantly reducing the amount of expansion into the tower on the air to improve the vacuum distillation unit i The machine is matched with the domestic 6000Nm ~ 3 / h air separation plant. The industrial comparative test shows that the oxygen output per hour is increased by 200m ~ 3, and the annual power consumption is 900,000瓩. The energy consumption of retrofitting auxiliary units and air separation plants is reduced Realistic meaning.