摘要：本設(shè)計(jì)是以年產(chǎn)40000噸的粗苯作為分離目標(biāo)，采用精餾塔分離的工藝方法，對(duì)整個(gè)工段進(jìn)行工藝設(shè)計(jì)和設(shè)備選型。最終使得在苯塔和甲苯塔中，苯的含量達(dá)到99.50%，鄰二甲苯收率為99%。本文針對(duì)整個(gè)設(shè)計(jì)要求對(duì)整個(gè)工藝流程進(jìn)行物料衡算，熱量衡算。并根據(jù)熱力學(xué)定律，對(duì)精餾塔進(jìn)行熱量衡算，求得理論塔板數(shù)（分別為11塊和13塊）、實(shí)際塔板數(shù)（分別為22塊和25塊）以及最小回流比（分別為1和2.9）。并根據(jù)設(shè)計(jì)要求，對(duì)精餾塔的塔徑、塔高、塔頂冷凝器、塔底再沸器，理論上進(jìn)行了尺寸計(jì)算及選擇。并且分別對(duì)精餾段、提鎦段進(jìn)行了校核。滿足設(shè)計(jì)要求，達(dá)到所需要的工藝條件。本著理論聯(lián)系實(shí)際的精神。本文對(duì)整個(gè)工藝流程及車間生產(chǎn)進(jìn)行了經(jīng)濟(jì)技術(shù)分析，其中包各部件的材質(zhì)、用材量的選擇的經(jīng)濟(jì)評(píng)價(jià)、設(shè)備投資及投資回收期的計(jì)算。

關(guān)鍵詞：物料衡算 甲苯 鄰二甲苯 熱量衡算 精餾

Abstract:The design is based on an annual output of 40，000 tons for the production of crude benzol with using column distillation to do the whole process design and equipment selections．And we make the target：we will get the benzene 99.50%，and the O-xylene  is 99%．Based on the design requirements of the entire process of the material balance and energy balance．According to the laws of thermodynamics，right Distillation tower of the heat balance．Through on the driver，and seek the theory of plate numbers（11and13），the actual plate number（22and25） and the minimum reflux ratio（1and2.9）．And based on the design requirements of Distillation Tower is high to the tower path，tower condenser and reboiler bottom，theoretical calculation of the size and choice．Respectively distillation of the right，stripper of the check．As far as possible to meet the design requirements to achieve the required conditions．In theory with practical spirit．In this paper，the whole production process and conduct workshops on economic and technical analysis，which includes parts of the material，feed with the choice of economic evaluation，equipment and speculative investment payback period calculations．

Keywords:material balance，benzene，O-xylene，energy balance，Distillatio