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        精餾塔設計

        2021-07-20 17:45:45
        精餾塔設計
        詳細介紹:


        精餾塔是進行精餾的一種塔式氣液接觸裝置。利用混合物中各組分具有不同的揮發度,即在同一溫度下各組分的蒸氣壓不同這一性質,使液相中的輕組分(低沸物)轉移到氣相中,而氣相中的重組分(高沸物)轉移到液相中,從而實現分離的目的。精餾塔也是石油化工生產中應用極為廣泛的一種傳質傳熱裝置。下面隨精餾塔設計小編來簡單了解一下吧。


        無論是平衡蒸餾還是簡單蒸餾,雖然可以起到一定的分離作用,但是并不能將一混合物分離為具有一定量的高純度產品。在石油化工生產中常常要求獲得純度很高的產品,通過精餾過程可以獲得這種高純度的產品。


        精餾過程所用的設備稱為精餾塔,精餾塔設計大體上可以分為兩大類:①板式塔,氣液兩相總體上作多次逆流接觸,每層板上氣液兩相一般作交叉流。②填料塔,氣液兩相作連續逆流接觸。一般的精餾裝置由精餾塔塔身、冷凝器、回流罐,以及再沸器等設備組成。進料從精餾塔中某段塔板上進人塔內,這塊塔板稱為進料板。進料板將精餾塔分為上下兩段,進料板以上部分稱為精餾段,進料板以下部分稱為提餾段。


        The rectification tower is a tower type gas-liquid contact device for rectification. Using the different volatility of each component in the mixture, that is, at the same temperature, the vapor pressure of each component is different, so that the light components (low boilers) in the liquid phase are transferred to the gas phase, while the Heavy components (high boilers) are transferred to the liquid phase to achieve the purpose of separation. Distillation tower is also a kind of mass and heat transfer device that is extremely widely used in petrochemical production. Let's take a brief look at it with the small editor of distillation tower design.


        Whether it is balanced distillation or simple distillation, although it can have a certain separation effect, it cannot separate a mixture into a certain amount of high-purity products. In petrochemical production, it is often required to obtain high-purity products, and this high-purity product can be obtained through the rectification process.


        The equipment used in the rectification process is called a rectification tower. The design of the rectification tower can be roughly divided into two categories: ①The plate tower, the gas-liquid two phases are in general countercurrent contact for many times, and the gas-liquid two-phase on each layer is generally Make cross flow. ② In the packed tower, the two phases of gas and liquid are in continuous countercurrent contact. The general rectification device is composed of rectification tower body, condenser, reflux tank, and reboiler. The feed material enters the tower from a certain section of the rectification tower, and this tray is called the feed plate. The feed plate divides the rectifying tower into two upper and lower sections. The part above the feed plate is called the rectification section, and the part below the feed plate is called the stripping section.

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