用于丝光印染淡碱回收的热泵蒸发系统的㶲分析  

Exergetic Analysis for Recycling of Dilute Alkali from Mercerizing with Heat Pump Evaporation System

作　　者：鞠婉兰 周亚素[1,2] 王晔琪 邢磊[1,2] 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]东华大学国家环境保护纺织工业污染防治工程技术中心,上海201620

出　　处：《东华大学学报（自然科学版）》2015年第6期838-843,共6页Journal of Donghua University(Natural Science)

摘　　要：确定了用于丝光印染淡碱回收的热泵蒸发技术的工艺流程,运用分析法对系统的主要部件建立了分析模型,并根据系统的平衡原则,计算得到的平衡相对误差仅为1.1%,具有足够的精度,满足工程计算和分析要求.分析结果表明:系统效率为4.8%,压缩机、蒸发器、水泵及排放的损失是系统损失的主要部分,分别为36.9%,31.2%,19.0%和9.2%.由此可见,热泵蒸发技术虽然充分回收利用了二次蒸汽的余热,具有较高的热效率,但效率仍然很低,且损失主要来自压缩机及蒸发器,占总数的68%.因此系统在设计及改进时,应着重减少压缩机和蒸发器的不可逆损失,压缩机工作时尽量接近绝热压缩过程,提高定熵效率,而在蒸发器中尽量选择较小的传热温差.The technological processes of heat pump evaporation system that mainly utilized in the recycling of dilute alkali from mercerizing was discussed, and a model of all the main modules of the system was established by exergetic analysis. Based on the exergetic equilibrium of the system, the derived relative error of exergy is 1. 1%, which is precise enough to satisfy the requirements of engineering analyses. Calculation results indicate that the total exergetic efficiency of the system is 4.8%, which is mainly contributed by the compressor, the evaporator, the water pump and emission section with exergetic loss of 36. 9%, 31. 2%, 19. 0% and 9. 2%. Such exergetic efficiency is relatively low, compared to the high thermal efficiency of the system achieved by taking full advantage of the heat of secondary steam. Given that the loss of exergy from the compressor and evaporator takes 68% of the total amount, more attention and emphasis should be put to reduce the irreversible loss of them, and increase isentropic efficiency by approximating adiabatic compression during the working process of the compressor. Meanwhile, less temperature difference between cold and hot fluid must be guaranteed.

关 键 词：丝光印染 淡碱回收 热泵蒸发 㶲分析 

分 类 号：TQ028.61[化学工程]