["Como métodos de controle podem garantirria um produto合格的产品在同分异构体精馏塔中得到？

2017-03-06View Original

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二. 同分异构体通常沸点都很接近，精馏塔分离时DCS如何控制才能得到合格的产品！望赐教！

Reply #22017-03-10

Não é o DCS que决定分离效果的，而是根据同分异构体的特性计算出相应的理论板，从而确定填料类型和分布器等内件形式，从而确定塔高，才能分得开两种物质。如果塔够高，DCS控制精度差一点也可以分开的，如果塔高不够，精心操作也达不到要求。

Reply #32017-03-21

沸点及其接近用精馏不太合适吧

Reply #42017-03-22

“不是DCS来决定分离效果的””这是真理。同分异构体，沸点接近，需要较多的理论板（塔高），几乎和控制无直接关系。

Reply #52017-03-28

当然如果精馏不行也可以采用吸附（比如二甲苯同分异构体）、结晶或精馏-结晶（硝基甲苯同分异构体）等方法。"]

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["Como métodos de controle podem garantirria um produto合格的产品在同分异构体精馏塔中得到？

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