【Daily Question】 2016 07 19 Hydrogenation Sector Multiple-choice Question
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This post was last edited by zls1457 on 2016-7-22 07:45. [Daily Question] 2016-07-19: Hydrogenation sector – How many feeding conditions are there for distillation columns? Answer: Five. The thermal condition of the feed is usually expressed by the vaporization rate e. First, when e < 0, it is called a subcooled liquid feed ； The second case is when e=0, which is referred to as a saturated liquid-phase feed ； Thirdly, when 0＜e＜1, it is called a partially vaporized two-phase feed ； The fourth case is when e=1, which is referred to as a saturated vapor feed ； Fifthly, when e>1, it is called superheated steam feed.
There are 5 types: 1) supercooled liquid feed； 2) Bubble point feeding ； 3) Gas-liquid mixed feed ； 4) Saturated steam feed ； 5) Superheated steam feed.
1. Subcooled liquid, q>1; 2. Saturated liquid, q=1; 3. Vapor-liquid mixture, 0
(1) Cold feed; (2) Bubble-point feed; (3) Vapor-liquid mixed feed; (4) Saturated vapor feed
Cold feed, bubble-point feed, gas-liquid mixed feed, saturated steam feed, superheated steam feed
1. Supercooled liquid, q>1; 2. Saturated liquid, q=1; 3. Vapor-liquid mixture, 0
It can be divided into 5 types, namely ① cold feed； ②Sponge feeding ； ③Gas-liquid mixed feed ； ④Saturated steam feed ； ⑤Superheated steam feed.
Cold liquid, saturated liquid, saturated vapor, superheated vapor
Cold liquid, saturated liquid, saturated vapor, superheated vapor
3 types: subcooled, saturated, superheated