（毕业设计论文）《45m3h淀粉废水回收工段多效蒸发器的工艺设计》.doc

PAGE PAGE 摘 要 摘要：多效蒸发器的特点是利用前效产生的二次蒸汽来推动后一效蒸发器，以达到节能降耗的目的。在本次设计中通过多方搜集资料，从设计条件出发，对马铃薯淀粉废水处理工段进行了物料恒算和热量衡算，计算确定出蒸发器相关工艺尺寸，对主要部件的进行结构选型，并对多效蒸发过程的换热系数进行了校核，确认设计结果符合设计任务要求。最后对设备的防腐保温作了分析。 关键词：淀粉废水；多效蒸发；工艺衡算；工艺尺寸；校核；防腐保温 ABSTRACT ABSTRACT:The multi-effect evaporator is characterized by the use of the former that have a secondary effect of steam to push the latter effect evaporator in order to achieve the purpose of saving energy and reducing consumption.Design in this gather information through various, from the design conditions, wastewater treatment of potato starch to the materials section Constant heat balance calculation and the calculation to determine the relevant process evaporator size, the main structural components of selection and multi-effect evaporation process of the heat transfer coefficient for the calibration, the results confirm the design with the design requirements of the mandate. Finally, the corrosion of equipment made by analysis of thermal insulation. KEY WORDS: starch wastewater; multi-effect evaporation; process balance; process size; check; anti-corrosion heat 目 录 TOC \o 1-3 \p \h \z \u HYPERLINK \l _Toc230154269 1 前言 PAGEREF _Toc230154269 \h 1 HYPERLINK \l _Toc230154270 1.1毕业选题的意义 PAGEREF _Toc230154270 \h 1 HYPERLINK \l _Toc230154271 1.1.1宁夏南部山区马铃薯淀粉加工企业现状 PAGEREF _Toc230154271 \h 1 HYPERLINK \l _Toc230154272 1.1.2马铃薯淀粉的工业用水 PAGEREF _Toc230154272 \h 1 HYPERLINK \l _Toc230154273 1.1.3 淀粉生产废水的处理 PAGEREF _Toc230154273 \h 2 HYPERLINK \l _Toc230154274 1.2本次设计的主要内容 PAGEREF _Toc230154274 \h 2 HYPERLINK \l _Toc230154275 2 淀粉废水回收系统的工艺设计 PAGEREF _Toc230154275 \h 4 HYPERLINK \l _Toc230154276 2.1原料罐工艺衡算 PAGEREF _Toc230154276 \h 4 HYPERLINK \l _Toc230154277 2.2预热罐工艺衡算 PAGEREF _Toc230154277 \h 4 HYPERLINK \l _Toc230154278 2.3热压缩器工艺衡算 PAGEREF _Toc230154278 \h 4 HYPERLINK \l _Toc230154280 2.4闪蒸罐工艺衡算 PAGEREF _Toc230154280 \h 5 HYPERLINK \l _Toc230154281 2.5真空脱滤工艺衡算 PAGEREF _Toc230154281 \