應(yīng)用化學專業(yè)文獻原文及翻譯-全文預(yù)覽
【正文】 a direct impact on the change of the amount of steam,the latter increase will produce entrained,even feedstock is too low,the operation is not good to maintain the balance of the tower,the steam velocity decreases,the plate is prone to leakage,the rectification efficiency is lowload operation,may be appropriate to increase the reflux ratio,the tower operating in a load lower limit above normal and stable operation in order to maintain the ponent of the changes directly affect the product restructuring concentration increase in the rectifying section load separation is not good,the results of restructuring were brought to the top of tower,causing the top of the tower of inferior from the reboiler,the top of the tower losses the concentration of the volatile group in the feeding group were increased,and the stripping section of the load increases,may be poor due to the separation caused by the tower reactor products of inferior quality,which entrained volatile ponents restructuring concentration increased,the feeding mouth move down and vice versa,then move same time,operating temperature,back flow and operating pressure must be adjusted accordingly in order to ensure the stability of the distillation operation.Distillation,increasing the reflux ratio,can improve the quality of the product,but the reflux ratio is too large,the inner loop of the tower increased,increasing energy of the reflux ratio,the tower gasliquid contact is not good,the balance to damaged and therefore the mass transfer efficiency same time,the operating pressure drop,difficult volatile ponents easily brought to the top of the tower,resulting in a substandard product.2 Anomalies in the distillation column during operation Plate capacityRectifying section tray downer overflow liquid transportation,however,that the tower upper part of the beginning of flooding,a phenomenon known as downer obstruction or liquid causes is to block the liquid leaving the tower board level rise in the downer plate between mist entrained excessive leaving the tray efficiency to reduce entrainment of this phenomenon is known as the excessive fog or steam flooding,the reason is the relativein the gas while the tower board bubbling area is too small. Plate foulingSediment cumulative to the board of board of the tower is an important issue,trays of dirt will tower premature flooding will reduce the plate scaling phenomenon:(1)The reflux ratio is not high on liquid pan。(2)pact,small footprint,high heat transfer coefficient。(3)the condensate liquid seal failure.Hydrophobic failure caused by hydrophobic failure factors: Thermosiphon rebiler failureReboiler liquid inlet pipe and outlet pipe cold liquid mixture exists between the density difference is the density difference driving the process of processing liquid flow through the tower h
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