【正文】 by steam reboiler. (1)gasbarrier drain valve failure。(2)steam condensate collected indoor pressure is too large。(3)the condensate liquid seal failure. Hydrophobic failure caused by hydrophobic failure factors: Thermosiphon rebiler failure Reboiler 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 humoral bit elevated to the reboiler back to the liquid nozzle height,siphon circulation will be circulation rate reduction will result in the reduction of heat transfer,thus the cover back to the fluid nozzle is clearly an important reason for fluctuations in the reboiler duties. Noncondensable gas in the water vapor 本科畢業(yè)設計 —— 文 獻翻譯 5 Steam reboiler to run the process,water vapor may be noncondensable gases,or the reboiler leak,the hydrocarbon vapor or other noncondensable gas into the reboiler,the noncondensable gas into the reboiler pipingthereby reducing the heat transfer capacity of the reboiler with the distillation column within a circulating fluid,thus causing the reboiler heat transfer efficiency decreased. 4 Conclusion In view of these problems often appear in a production run affect the operation of the distillion unit,leading ton the top of the tower or the bottom of product failure,seriously restricting the production device to run resulting in product order to avoid such things from bappening,the operator should do the following: storage and transportation of materials Plate column distillation process must be set in place a number of different volume raw material storage tanks,pumps and all kinds of heat exchanger has been temporarily stored,transported and preheating(cooling)of materials used,in order to protect the device can be a continuous and stable operation. Necessary means of detection In order to facilitate the resolution of the problem in the operation shall be the appropriate place in the process to set the necessary instrumentation,as well as to obtain the pressure,temperature and other addition,often set in a particular place manholes and hand holes,so that regular testing and maintenance. Adjustment device State parameters are not in the actual production value should be placed in the appropriate location of a certain number of the valve to be adjusted to achieve the production requirements,can be a double adjustment,that is both automatic and manual adjustment coexist,and at any timeswitch. 本科畢業(yè)設計 —— 文 獻翻譯 6 板式精餾塔的操作 吳昌祥 （哈爾濱氣化廠，黑龍江 哈爾濱 154864） 摘要：本文通過對影響精餾塔因素的分析及異?，F(xiàn)象剖析，分析精餾過程從而指導實際操作。 關鍵詞：精餾塔，精餾，再沸器，操作 中國分類號： 文獻標識碼： A 精餾塔是 根據(jù)混合物中各組分揮發(fā)度的不同，在每層塔板上進行多級部分汽化和部分冷凝，從而達到使混合物各組分分離的 一種塔式氣液接觸裝置，又稱蒸餾塔。有板式塔和填料塔兩種類型。根據(jù)操作方式又分為連續(xù)精餾塔與間歇精餾塔。蒸汽從塔底進入，與下 降液進行逆流接觸，兩相接觸中，下降液中 的易揮發(fā)（低沸點）組分不斷地向蒸汽中轉移，蒸汽中的難揮發(fā)（高沸點）組分 不斷地向下降液中轉移。蒸汽愈接近塔頂，其易揮發(fā)組分濃度愈高，而下