减压蒸发,又称负压蒸发或真空蒸发。蒸发器在负压条件下进行操作讷过程。需要密闭的设备,经常是将二次蒸汽经冷凝器冷凝后排出,使蒸发器内的二次蒸汽成为负压。此时,溶液的沸点比常压时降低,加热蒸汽与二次蒸戳之间的有效传热温差可提高,蒸发器的生产强度可增大。减压蒸发的加热蒸汽可以使用低压蒸汽或废气作为热源,同时操作中系统的热损失也小,故应用广泛。
... 多效蒸发;multiple-effect evaporation 减压蒸发;reduced pressure evaporation 热泵蒸发;thermo-compression evaporation ...
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本窗口显示的是减压蒸发器的出口压力,其作用主要是维修和调整用。
Gas pressure: this window display exit pressure of reducer its function is maintain and adjustment.
方法:将中药黄芩加水熬制,采用负压抽滤后合并滤液,用减压蒸发的方法将药液浓缩制成水提液。
METHODS:We decoct the Chinese medicine Scutcllaria Baicalensis Georgi by adding water, then drainaging and filtering it under the negative pressure before we collect the filtrate.
介质经缓流减压之后再进入介质流道,可以均匀的分配到传热板之间的各个蒸发流道。
Medium is subject to slow flow pressure reduction and then enters the medium flow passage, and can be evenly distributed to various evaporation flow passages among heat transfer plates.
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