半干法脱硫灰在湿法脱硫方面的实验研究  

Experimental study on wet desulphurization of semi-dry desulphurization ash

作　　者：杨晓域 黄亚继[1] 顾立群[2] 林红英[2] 王新宇[1] 刘洋[1] 张臻荣 曹歌瀚 李志远 YANG Xiao-yu;HUANG Ya-ji;GU Li-qun;LIN Hong-ying;WANG Xin-yu;LIU Yang;ZHANG Zhen-rong;CAO Ge-han;LI Zhi-yuan(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,China;Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China)

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,江苏南京210096 [2]宝山钢铁股份有限公司,上海201900

出　　处：《应用化工》2022年第12期3580-3585,3591,共7页Applied Chemical Industry

基　　金：江苏省重点研发项目(BA2020001)。

摘　　要：将半干法脱硫灰用于湿法脱硫,研究了烟气温度、流量、SO_(2)浓度、液气比以及pH值对脱硫效率的影响,并与传统湿法脱硫剂石灰石进行对比,结果显示:脱硫效率随着烟气温度、流量及SO_(2)浓度的上升而下降,随着液气比及pH值的上升而上升。半干法脱硫灰具有90%以上的脱硫效率及较强的脱硫活性,与石灰石相比,脱硫效率的差值最大不超过5%,虽然脱硫有效时间减少但可通过多次加料进行弥补;半干法脱硫灰的掺配量不超过50%时可以满足脱硫效率不低于95%的排放指标,石膏含水率也保持在15%以内,可以很大程度上节省经济成本。Semi-dry desulphurization ash was used for wet desulphurization.The experiment mainly studied the influence of flue gas temperature,flow rate,SO_(2)concentration,liquid gas ratio and pH value on desulfurization efficiency.The results show that the desulfurization efficiency decreases with the increase of flue gas temperature,flow and SO_(2)concentration,and increases with the increase of liquid gas ratio and pH value.The semi-dry desulfurization ash has strong desulfurization activity.When it is applied to wet desulfurization,its desulfurization efficiency can exceed 90%.Compared with limestone,the difference of desulfurization efficiency is less than 5%.Although the effective time of desulfurization is reduced,it can be compensated by multiple feeding to extend effective desulfurization time.In the mixing ratio experiment,the desulfurization efficiency is not less than 95%when the content of semi-dry desulfurization ash is less than 50%,and the water content of gypsum is kept within 15%.It can save economic cost greatly.

关 键 词：湿法脱硫 半干法脱硫灰 石灰石 

分 类 号：TQ016[化学工程] TQ424[环境科学与工程—环境工程] X701.3