双效并流中央循环管式蒸发器设计

目 录

任务书 ---------------------------------------------------------------------------------------------------------------- 2 1.蒸发工艺设计计算 ----------------------------------------------------------------------------------------------- 2 1.1蒸浓液浓度计算 -------------------------------------------------------------------------------------------- 2 1.2溶液沸点和有效温度差的确定 -------------------------------------------------------------------------- 3 1.2.1各效由于溶液的蒸汽压下降所引起的温度差损失 ---------------------------------------------- 3 1.2.2各效由于溶液静压强所因引起的温度差损失 -------------------------------------------------------- 3 1.2.3由经验不计流体阻力产生压降所引起的温度差损失 ---------------------------------------------- 4 1.3蒸发器的传热面积和有效温度差在各效中的分布 -------------------------------------------------- 6 1.4有效温差再分配 -------------------------------------------------------------------------------------------- 7 2.蒸发器工艺尺寸计算 ------------------------------------------------------------------------------------------ 10 2.1 加热管的选择和管数的初步估计 -------------------------------------------------------------------- 10 2.1.1加热管的选择和管数的初步估计 --------------------------------------------------------------------- 10 2.1.2循环管的选择 ---------------------------------------------------------------------------------------------- 10 2.1.3加热室直径及加热管数目的确定 --------------------------------------------------------------------- 10 2.1.4分离室直径与高度的确定 ------------------------------------------------------------------------------- 11 2.2接管尺寸的确定 ------------------------------------------------------------------------------------------ 12 2.2.1溶液进出口 ------------------------------------------------------------------------------------------------- 12 2.2.2加热蒸气进口与二次蒸汽出口 ------------------------------------------------------------------------ 12 2.2.3冷凝水出口 ------------------------------------------------------------------------------------------------- 13 3.蒸发装置的辅助设备 ------------------------------------------------------------------------------------------ 13 3.1气液分离器 ------------------------------------------------------------------------------------------------ 13 3.2蒸汽冷凝器 ------------------------------------------------------------------------------------------------ 13 4.工艺计算汇总表 ------------------------------------------------------------------------------------------------ 14 5.工艺流程图、蒸发器设备简图及加热器的管子排列图 ---------------------------------------------- 14 5.1工艺流程图 ------------------------------------------------------------------------------------------------ 14 5.2中央循环管切面图 --------------------------------------------------------------------------------------- 16 6.课程设计心得 --------------------------------------------------------------------------------------------------- 17 7.参考文献： ------------------------------------------------------------------------------------------------------ 17