燃煤机组脱硫废水零排放物料-能-水耦合机制及优化  

Matter-energy-water coupling mechanism and optimization for zero discharge of desulfurization wastewater from coal-fired units

作　　者：陈程 陈鑫[2] 徐凤 吴斌 李元媛[2] 陆规[2] CHEN Cheng;CHEN Xin;XU Feng;WU Bin;LI Yuanyuan;LU Gui(China Energy Construction Group Jiangsu Electric Power Design Institute Co.,Ltd.,Nanjing 211102,Jiangsu,China;School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;China Energy Construction Group Anhui Electric Power Design Institute Co.,Ltd.,Hefei 230022,Anhui,China)

机构地区：[1]中国能源建设集团江苏省电力设计院有限公司,江苏南京211102 [2]华北电力大学能源动力与机械工程学院,北京102206 [3]中国能源建设集团安徽省电力设计院有限公司,安徽合肥230022

出　　处：《化工学报》2021年第11期5800-5809,共10页CIESC Journal

基　　金：中国能源建设集团众筹科技(CEEC-ZC-2018-011);国家自然科学基金项目(51876057)。

摘　　要：湿法脱硫排出的废水是燃煤机组废水中最难处理的末端废水之一。热法固化是实现脱硫废水零排放的必然途径。通过构建整个燃煤机组厂级尺度热力系统虚拟仿真模型,从能量流、物料流、水平衡及其之间的相互影响机制的角度对比分析了目前三种主流不同脱硫工艺路线的优劣。在此基础上,提出了基于吸附式热泵和多效蒸馏浓缩,废热用于干燥的新型脱硫工艺,新工艺所需的高温烟气量最小,仅为旁路直喷式的1/5,为目前主流浓缩干燥方案的1/3,在回收水分的同时,极大降低高温烟气的消耗量,降低对主机安全性的影响。相关研究可以为燃煤机组脱硫废水零排放及深度节水提供新的解决思路。The waste water discharged from wet desulfurization is one of the most difficult terminal waste water in the waste water of coal-fired units.Thermal curing is the inevitable way to achieve zero discharge of desulfurization wastewater.By constructing a virtual simulation model of the whole coal-fired unit plant-scale thermal system,the advantages and disadvantages of the three mainstream different FGD process routes are compared and analyzed from the perspectives of energy flow,material flow,water balance,and their mutual influence mechanisms.On this basis,a new desulfurization process with heat pump and multi-effects distill is proposed,which requires the smallest amount of high-temperature flue gas,only 1/5 of the bypass direct injection type,and 1/3 of the current mainstream concentration and drying scheme.The new process significantly reduces the consumption of hightemperature flue gas while recovering water and increasing the host.s safety.The related research can provide new solution ideas for eliminating desulfurization wastewater from coal-fired units and deep water-saving and provide quantitative analysis and optimization methods.

关 键 词：脱硫废水 零排放 物料-水-能耦合 多效蒸馏 吸收式热泵 

分 类 号：TK223.33[动力工程及工程热物理—动力机械及工程]