年处理30万吨焦油精制车间工业萘工段初步设计 论文.doc

PAGE 1 PAGE I 摘 要 在全球范围内,煤炭资源要比石油资源丰富很多。因此，煤化工的发展必将成为石油化工的重要补充和替代领域。 萘是最基本的稠环芳烃，是重要的有机化工原料。1821年从煤焦油中发现萘，1821年从煤焦油中分离出纯萘。直到现在，煤焦油依然是萘化合物的主要来源。萘在煤焦油中的含量为8％～15％，它的含量与炼焦温度及热解产物在炭化室顶部空间的停留时间有关。 生产工业萘的方法很多，有单炉单塔、单炉双塔、双炉双塔、四炉四塔、Brodie连续结晶法及间歇蒸馏工艺。考虑到本设计年处理煤焦油为30万吨，因此本设计采用的是双炉双塔连续精馏工艺流程，所选原料馏分为已洗两混馏分。在设计过程中对工艺系统所使用的主体设备——初馏塔、圆筒立管式管式炉、原料与工业萘换热器及工业萘汽化冷凝冷却器进行选型，同时进行校核计算。 关键词 萘 煤焦油 初馏塔 圆筒立管式管式炉 原料与工业萘换热器 Abstract Coal resources than the rich oil resources in the world. Therefore, the development of coal chemical industry will certainly become an important complementary and alternative areas of the petrochemical industry. Naphthalene is the most basic polycyclic aromatic hydrocarbons, but also an important organic chemical raw materials. Naphthalene from coal tar in 1821, 1821 isolated pure naphthalene from coal tar. Until now, the coal tar is still the main source of naphthalene compounds. Naphthalene in coal tar content of 8% to 15% of its content and coking temperature and pyrolysis products related to space in the top of the coking chamber residence time. Production of industrial naphthalene, a single tower with a single furnace, a single furnace Twin Towers, Twin Towers double oven, four furnaces and four towers, Brodie, continuous crystallization and batch distillation process. This design taking into account the processing of coal tar to 30 million tons, this design uses a dual furnace continuous distillation towers process fraction of raw materials to wash the two mixed fractions. Distillation column in the design process - the beginning of the main equipment used in process systems, cylindrical riser tube furnace, raw materials and industrial naphthalene, heat exchangers and industrial naphthalene vaporized condensate cooler selection, while checking calculation . Key words naphthalene Coal tar Primary tower Cylinder stand tube tube furnace Raw materials and industrial naphthalene heat exchanger 目 录 TOC \o 1-3 \h \u HYPERLINK \l _Toc29