高沸点升溶液蒸发系统的设计与分析

发布时间：2018-02-01 23:59

  本文关键词： 高沸点升 机械蒸汽再压缩 分级压缩 多级压缩 蒸发　出处：《过程工程学报》2017年04期 　论文类型：期刊论文

【摘要】：针对高沸点升溶液蒸发过程的特点,结合蒸汽压缩机提升二次蒸汽压力和温度的实际能力,提出一种分级压缩的机械蒸汽再压缩(MVR)蒸发系统,建立了分级压缩和多级压缩MVR蒸发系统的数学模型,考察了溶液沸点升高、压缩机压缩比和一级排出液浓度等运行参数对蒸发系统能耗、蒸发器换热面积、设备成本和系统总费用的综合影响.结果表明,分级压缩MVR蒸发系统适用于沸点升在15℃以上的物料,NaOH溶液浓缩的最优操作工况为压缩机压缩比2.0、一级排出液浓度23%(w).相同蒸发水量下,分级压缩MVR蒸发系统可节约47.83%的系统能耗和28.75%的设备成本,比多级压缩MVR蒸发系统节能效果好.
[Abstract]:According to the characteristics of high boiling point rising solution evaporation process and the practical ability of steam compressor to raise the secondary steam pressure and temperature, a mechanical steam recompression (MVR) evaporation system is proposed. The mathematical models of MVR evaporation system with stepwise compression and multistage compression were established. The operating parameters such as the increase of boiling point of solution, the compression ratio of compressor and the concentration of first-order discharge liquid were investigated for the energy consumption of evaporation system and the heat transfer area of evaporator. The combined effect of equipment costs and total system costs. The results show that, The optimal operating condition for the concentration of NaOH solution of materials with boiling point above 15 鈩，

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