應(yīng)用化學(xué)專業(yè)文獻(xiàn)原文及翻譯(編輯修改稿)
2024-07-12 20:57 本頁面
【文章內(nèi)容簡(jiǎn)介】 lies 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)The pressure drop increase between the tray。(3)Increase the reflux ratio on the bottom of the column temperature,flow or reboiler load does not have any impact,if the reflux ratio to the heat balance and material balance of 20% to 30%,while the tower did not change significantly,then the tower must be pletely full of amount of returning tower direct stream gas pipeline through the top of the tower back to the reflux tank. Slug flows in the riserSlug flow in the riser is a distillation column running unstable,may be caused due to an unstable gasliquid mixture flow in the vertical tank is elevated at the of the condenser by the condenser discharge logistics is that part of the pipeline between the gasliquid twophase mixture,the condenser and reflux tank is called the a liquid column in the riser flow rate is too low will result in twophase separation,the distillation column to produce a back pressure,this liquid column intermittently be introduced after the riser,back pressure will weaken,then the risergradually being filled with liquid,such slug flow will cause the tower pressureperiodic pulse of change.Abnormal factors cause distillation column plate was washed away,condenser corrosion,clogged caondenser,not condensable gas influence condenser.Reboiler in the distillation column occupies a very important position,it used to bebottom after the vaporization of the liquid part of the back to the distillation column,two phases of the tower gasliquid contact and mass transfer to used the vertical thermal siphon reboiler,which is a vertical placement of the shell and tube heat vaporization of liquid in the bottomup tube passes through the heat exchanger,heating the heat carrier in the thermal siphon reboiler features:(1)cycle driving force:the density of the reactor liquid and the heat exchanger tube gasliquid mixture。(2)pact,small footprint,high heat transfer coefficient。(3)of the shell can not be mechanically cleaned,not suitable for hightower reactor,heat transfer medium viscosity,or dirty。(4)provide the spac
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