干煤粉气化工艺废水汽提系统设备结垢成因剖析  

Cause Analysis of Scaling on Equipment of Stripping System for Exhaust Waste Water of Dry Pulverized Coal Pressurized Gasification Process

作　　者：蔚永清 金政伟 井云环 张起胜 杨磊 杨会军 YU Yong-qing;JIN Zheng-wei;JING Yun-huan;ZHANG Qi-sheng;YANG Lei;YANG Hui-jun(Coal Chemical Industrial Technology Research Institute,China Energy Group Ningxia Coal Industry Co.,Ltd.,Lingwu 750411,China)

机构地区：[1]国家能源集团宁夏煤业有限责任公司煤炭化学工业技术研究院,灵武750411

出　　处：《当代化工》2021年第12期2835-2838,2843,共5页Contemporary Chemical Industry

基　　金：宁夏回族自治区重点研发计划(沿黄试验区科技创新专项)项目(项目编号:2019BDE02004);国家能源集团宁夏煤业有限责任公司自立项目(项目编号:NXMY-19-06)。

摘　　要：针对干煤粉气化工艺外排废水汽提系统生产运行中存在的结垢问题,结合生产实际,对系统水质和结垢严重部位两个典型垢样采用工业分析、XRD、FTIR、XRF等手段进行表征,针对表征结果开展实验。结果表明:净化水塔底冷却器工艺介质侧垢样主要为无机碳酸盐析晶结垢,回流泵内垢样为铝合絮凝剂絮团沉降时引发,以及裹挟无机难容成分结晶沉降,最终形成了有机絮凝物和无机结晶物混杂态水垢。In view of the scale problems existing in the production and operation of the effluent stripper system of dry pulverized coal gasification process,the two typical scale samples of the system water quality and the parts with serious scale were tested and analyzed in combination with the production practice.The scale samples were characterized by industrial analysis,XRD,FTIR,XRF,and the experiment was conducted based on the characterization results.The experimental conclusion and analysis results showed that the scale sample on the side of the medium in the process of purifying water tower bottom cooler was mainly inorganic carbonate crystal scaling,and the scale sample in the reflux pump was caused by the settlement of aluminum flocculant and the crystal settlement of the entrapped inorganic incompatible components,and the organic flocculant and inorganic crystal mixture scale was formed.

关 键 词：干煤粉气化工艺 水循环系统 废水汽提 结垢成因 剖析 

分 类 号：TQ546[化学工程—煤化学工程]