烟气脱硫溶液中硫酸根的去除.pdf

化
环保
2014第34卷第2期
ENVIRONMENTAL PROTECTION OF CHEMICAL INDUSTRY
烟气脱硫溶液中硫酸根的去除
邱正秋,黎建明,任艳丽,王建山,张小龙
(攀钢集团研究院有限公司钡钛资源综合利用国家重点实验室,四川攀枝花617000)
摘要]分別采用石灰乳化学沉淀法和低温结品法去除气脱硫溶液中的SO:。灾验结果表明:在室温、CaO溶液质最分数
25%的条件下,石灰乳化学沉淀祛对SO的去除率仅为59.51%,且向溶液中人了Ca2,产牛的硫酸钙体废物难以再生利
用;采用低温结晶法处理烟气脱硫溶液,在结晶温度7、结晶时间3h、NaOH加入量34.8gL的条件下,SO2的去除率为
82.04%、滤液中的P(Na')为3.88gL、在现场工业用试验中,采用低温结品法去除烟气脱硫溶液巾的S0:.平均S0的去除
率可达70.00%以上,滤液中的(Na')小于15,00gL。该法可有效扣制烟气脱醗溶液中SO含量的増加
关键词]酸根;化学沉淀;低温结品;气脱硫溶液
中图分类号」X703文獻标志码」A文章编号1006-1878(2014)02-(133-04
Removal of $Oa from Flue Gas Desulphurization Solution
Qiu Zhengqiu, Li anming, Ren Yanli, Wang Jianshan, Zhang Xiaolong
Statc Key Laboratory of Comprchensive Utilization of Vanad m and Ti anium Rcsource, Pangang Group Rcsearch Institute Co
Ltd.. Panzhihua Sichuan 617000. China
Abstract: $O1 in fue gas desulfurization solution was removed by lime milk chemical precipitation and
low temperarure crystallization respectively. The experimental results show that: In the process of lime milk
chemical precipitation, under the conditions of room temperature and Cao mass fraction of the addition
solution 25%, the Soa removal rate is 59.51, and the solid waste calcium sulfate produced with the
added Ca " is difficult to be reused; In the process of low temperature crystallization, under the conditions
of crystallization temperature 7 C, crystallization time 3 h and NAOH dosage 34.8 g /L, the SO; removal
rate is 82.04%o, the p(Na)in the filtrated liquid is 3.88 L. The low temperature crystallization process
was applicd in $O removal from flue gas dcsulfurization solution, the avcragc SO, Removal rate is over
70.00%, and the p(Na ) in filtrated liquid is less than 15.00 gil. This process can effectively control the
increasing of SO in flue gas desulfurization solution
Key words: sulfate; chemical precipitation; low temperature crystallization; flue gas desulfurization
olution
烧结烟气有机胺法脱硫工艺是指采用有机胺电渗技术,洛阳石油化工工稈公司采用该技术进
脱硫渀液,首先在低温条件下对烧结烟气中的SO2行∫胺液热稳定盐浄化中试试验,发现阳离子损耗
进行富集,然后在高温下解析出高SO2,副
严重。文献[6]报道,采用大孔弱碱性阴离子交换
业级硫酸或高纯硫磺,生广过程中脱硫洿液可循环树脂去除有机胺类溶液中的硫酸盐,当SO含量较
利用2。由于攀钢集团烧结烟气中SO,含量高,粉高时,存在树脂用量大且交换频率高等缺点。国内
尘中含有钠等金属元素,在运行过程中,脱硫溶液外文献中均未觇采用低温结晶法?去除脱硫溶液中
中的SO2累积速率快、累积量大,导致脱硫溶液易SO2的报道
失效、设备腐蚀加速。脱硫溶液中SO的去除效
收稿日期]203-08-22;{修订日期.2013-1-25。
某直接影响烧结烟气中SO2的脱除效果。
作者简介]邱正秋(1975),男,四川省攀枝花市人,硕土
脱硫溶液中SO的去除方法主要有电渗析法、高级工程师,主要从導烧结烟气脱流工程技术的开发及应。电
CaCl2沉降法和离子交换法等。联碳公司开发了话1356864020电fqiuzhengu(@sina.com