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["Método de control de carga de caleida de caleión de caleor"

2017-02-12View Original

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["¿Qué métodos existen para el cusalimiento de carga de cusetión de casedal? Placa sensible------------ etc"
Reply #22017-02-12
)["Además, la
Reply #32017-02-21
本帖最后由 *amingteda 于 2017-2-21 09:24 编辑 这有何难,随便一本包含控制结构的化工书上都有介绍,普通精馏塔一般常用两种方案:1. 回流量固定,操作再沸器加热量以控制塔体中某灵敏板温度。比如:灵敏板温度高了,再沸器加热量减小;灵敏板温度低了,加热量增大。通过保证将灵敏板温度控制在某一范围内,达到控制产品组成的目的。 2. 固定再沸器加热量,操作回流量(或回流比,特殊情况下塔顶采出量)以控制某灵敏板温度。分析同上!
Reply #42017-02-21
精馏分离的实际物系及工况各不相同,必须采用相适应的控制方案,而且有许多分离脱除少量杂质的塔不存在灵敏板温度。例如,对于一些产品回收精馏塔,通常采用的控制方案为:塔釜液位高时需加大再沸器加热负荷,尽可能将产品组分由塔顶蒸出,避免误将产品组分作为重组分从塔底排出;当塔底重组分累积而使塔底温度上升到一定程度时,才适当加大塔底重组分排出流量或间隙排出重组分。

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