年产6万吨正己烷冷凝器设计.docx

平顶山学院2014届本科生毕业设计 年产6万吨正己烷冷凝器设计 PAGE \* MERGEFORMATIII 年产6万吨正己烷冷凝器设计 摘 要 本设计以正己烷为热流体，循环水为冷流体。根据正己烷在饱和温度下冷凝的传热过程，设计出符合工艺要求的换热器。首先，通过对整个换热过程进行物料衡算和热量衡算，确定采用固定管板式换热器，由计算可知换热器的热负荷为704.44 kW，冷却水流量为60698.56 kg/h；其次，根据有效平均温差可估算换热面积，并计算出换热器的传热管长为4.5 m，数目为136根，壳体内径为500 mm；最后,对所设计的换热器进行热量、温度和压强的核算，发现该换热器的面积裕度为21.9%，且温度、压强的核算结果都符合设计工艺要求，说明该换热器能满足生产需要。 关键词：正己烷；冷凝器；工艺尺寸；设计计算 The Design of the Annual Output 60000 Tons of n-Hexane Condenser Abstract The annual output 60000 tons of condenser was designed with n-hexane as thermal fluid and circulating water as cooling fluid. The condenser was suit to heat transfer requirements according to the boiling temperature of the n-hexane. First, the fixed plate heat exchanger was used based on the heat transfer process of material balance and heat balance. Calculation shows that the heat load of the heat exchanger was 704.44 kW and the cooling water flow was 60698.56 kg/h; Second, the heat transfer area was estimated by the log mean temperature difference, and the length of the heat exchanger tube was 4.5 meters, the number was 136 and the shell diameter was 500 millimeter; Finally, the heat, temperature and the pressure of the heat exchanger were accounted, and so the area of the heat exchanger margin was 21.9%, and the results all corresponded to the requirements, which means that the heat exchanger can meet the production needs. Keywords：n-hexane; the condenser; process size; design and calculation  平顶山学院2014届本科生毕业设计 年产6万吨正己烷冷凝器设计 目 录  TOC \o 1-3 \h \z \u  HYPERLINK \l _Toc462395459 1 绪 论  PAGEREF _Toc462395459 \h 1  HYPERLINK \l _Toc462395460 1.1 换热器的分类及结构特点  PAGEREF _Toc462395460 \h 1  HYPERLINK \l _Toc462395461 1.1.1 换热器的分类  PAGEREF _Toc462395461 \h 1  HYPERLINK \l _Toc462395462 1.1.2 换热器的结构特点  PAGEREF _Toc462395462 \h 2  HYPERLINK \l _Toc462395463 1.2 换热器的设计和选型依据  PAGEREF _Toc462395463 \h 2  HYPERLINK \l _Toc462395464 1.3 设计