【正文】 iquid pan。(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。 與其它化工單元操作相比，精餾裝置雖然比較簡單， 但 生產(chǎn)運行中經(jīng)常出現(xiàn)各種各樣的問題而影響精餾裝置的操作，從而導致塔頂或塔底產(chǎn)品不合 格，嚴重制約生產(chǎn)裝置的運行從而造成產(chǎn)品損失。當受到外界因素的影響而使操作壓力受到破壞時，塔的正常操作本科畢業(yè)設計 —— 文 獻翻譯 7 就會完全破壞。若從塔釜得到產(chǎn)品，則塔頂損失增加。其產(chǎn)生的原因在于液體阻滯在降液管內(nèi)而使塔板上液位升高，塔板間霧夾帶過量而使塔板效率降低，此現(xiàn)象稱為過量霧夾帶或蒸氣液泛，其原因是相對于較大的氣量而塔板上鼓泡區(qū)過小。 3. 再沸器 再沸器在精餾塔中占有很重要的位置，它用以將塔底液體部分汽化后送回精餾塔，是塔內(nèi)氣液兩相間接觸傳質得以進行。循環(huán)量降低會導致熱傳遞的減少，因而蓋住回液管口顯然是再沸器負荷波 動的一個重