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分析了内压缩流程空分设备主换热器热端温差对膨胀空气量和高压空气流量及压力的影响,提出选取合适的主换热器热端温差,可以使得空分设备的总功耗达到最小;提出随着内压缩流程空分设备液体比例的增加,适当选取较小一些的主换热器热端温差是有利的;分析了气体膨胀机效率和使用全液体膨胀机对热端温差选取和高压空气压力的影响。
The influence of temperature difference of hot end of main heat exchanger in internal compression process on expansion air flow and high pressure air flow and pressure is analyzed. It is suggested that the temperature difference of hot side of main heat exchanger can be selected to reach the total power consumption of air separation plant The temperature difference of the main heat exchanger of the smaller ones is appropriate. It is analyzed that the efficiency of the gas expander and the choice of the temperature difference of the hot end by the full liquid expander And the effect of high pressure air pressure.