问题:换热器内不用大管子而采用许多小管子,是为了提高传热面积,增加传热效果。
Tuesday, August 22, 2023
Friday, September 15, 2023
问题:机后冷却器VC气相温度控制()不造成液化。压缩机油压应控制在()。
Wednesday, November 15, 2023
Thursday, December 29, 2022
Tuesday, January 24, 2023
Monday, February 5, 2024
Sunday, August 6, 2023
问题:低塔塔釜加热量不够或塔顶温度控制较低会使精单体中的()含量上升。
Saturday, March 18, 2023
Tuesday, September 13, 2022
Saturday, September 10, 2022
Tuesday, August 22, 2023
Tuesday, August 22, 2023
Monday, February 5, 2024
Saturday, March 18, 2023
Sunday, May 7, 2023
问题:混合脱水主要利用盐酸冰点低的物理性质,将氯化氢与乙炔混合后的气体温度降到(),从而降低了水蒸气在混合器中的饱和蒸汽压而达到对混合气进行()的目的。
Thursday, June 22, 2023
问题:除去氯化氢气体中的水蒸气通常用()A、31%HClB、30%NaOHC、98%H2SO4D、15%HNO3
Tuesday, September 13, 2022
Sunday, June 4, 2023
问题:压缩机开车时气柜内VC纯度,含氧为()A、>80%.<3%B、>60%.<3%C、>60%.>3%D、>70%.<3%
Saturday, March 9, 2024
问题:氯乙烯合成要求氯化氢纯度为()。A、90~92%B、92~93.5%C、96~98%D、>93%
Thursday, June 22, 2023