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["[Diía por día] Conocimientos básicos de proceso (pregunta multiple elección)", ["El enfriado de retorno de la cima no operada es B. A, líquido, líqu fremente saturada B、C、A o B D、Ninguna de las respuestas anteriores",,"Las líe fr fríamente de retorno de la cima no operada pueden disminminir la temperatura de la cigm y presefinar la composición en la se de destilcción. En la práctica,,,,

2020-01-10View Original

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常压塔顶冷回流是 B 。 A、饱和液体 B、过冷液体 C、A或B D、以上答案都不对
Reply #22020-01-10
B,过冷液体,冷回流可以使塔顶温度降低,精馏段的组分下压,实际使用时一般是冷回流,很少采用热回流

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