應(yīng)用化學(xué)專業(yè)文獻(xiàn)翻譯中英文對(duì)照(文件)
【正文】 ine in the closer tower bottom liquid, its hard to be more volatile ponents rich set, to achieve ponent separation. Steam rising from the top of the tower into the condenser, the liquid part of the condensate as reflux liquid to return into the distillation tower, the rest is removed as distillate. Tower bottom outflow of liquid, some of which into the reboiler, thermal evaporation, the steam back to tower, and the other part of the liquid as residua release. Compared with other chemical unit operations,distillation unit,although relatively simple,single production run that often appear in a variety of problems affecting the operation of the distillation unit,leading to tower top orbottom of product failure,severe constraints of production equipmentthe operation resulting in product loss. changes in process conditions of distillation column Reboiler temperature Under the same operating pressure,raising the temperature of the reboiler,the volatile ponents in the tower liquid to reduce,at the same time,the rising vapor velocity increases,and help to improve the efficiency of mass products from the top of the tower,the tower reactor discharge of difficult volatiles volatile ponents to reduce and reduce the tower reactor effluents for the product,it can improve product quality tower discharge of volatile ponents 本科畢業(yè)設(shè)計(jì) —— 文 獻(xiàn)翻譯 2 entrained difficult nolatile ponents increased,thereby increasing the balanced operation,the reactor temperature is suddenly increased,and it too late to adjust the pressure and temperature will inevitably lead to the reboiler fluid is steamair, the pressure this time,the tower gas,liquid position changes,the restructuring were likely to be steamed to the top of the tower,so that the failure of top product. Operating pressure In the case of certain operating temperature,increasing the operating pressure can increase the productive capacity of the tower,so that stable operation,but the content of volatile group in the tower reactor distillation,often provides for the adjustment range of the operating the fallout of the operating pressure by extmrnal factors,were destroyed,the normal operation of the tower will be pletely destroyed. Feeding temperature Condensate feed,the feed temperature is lower than the temperature of the feeding board,and added if all the material into the stripper segment,stripping segment load increases,the reboiler consumption increase in the amount of steam,and the top of the tower is difficult volatile group were lower. Saturated steam feed,the feed material temperature is higher than the temperature of feed board,all the material of the feed into the rectifying section and stripping section of the load reduction,and increased load of the rectifying section,make the top product quality reduce. Feeding quantity and position changes Changes in the feedstock of a direct impact on the change of the amount
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