半干法镁基脱硫产物的水浸处理

doi:10.16085/j.issn.1000-6613.043

摘要/Abstract

摘要：

目前镁基脱硫产物的处理主要集中在湿法镁基脱硫产物，在半干法镁基脱硫产物的处理利用方面少有报道。为了解决这一问题，本文采用了水浸泡的方法对半干法镁基脱硫产物进行处理，研究浸泡次数、浸泡温度和浸泡时间对脱硫产物的影响，通过X射线衍射仪（XRD）、扫描电子显微镜（SEM）、X射线荧光光谱仪（XRF）对产物进行分析。结果表明：水浸后的脱硫产物分为水溶液、固体块状物和沉渣三部分。溶液中的溶质主要是硫酸镁和氯化镁，第一次浸泡硫酸镁和氯化镁的浸出量达8.85%，远高于第二次浸泡的2.33%，浸泡温度为70℃时得到的硫酸镁和氯化镁比室温和50℃多0.14%~3%，浸泡3天后溶液密度几乎不再变化；固体块状物主要成分为氢氧化镁和少量的硫酸盐和氯化物；沉渣主要成分是氢氧化镁。水浸处理可以完成脱硫产物的再利用。

关键词: 脱硫产物, 浸泡, 回收, 硫酸镁, 六水氯化镁, 氢氧化镁

Abstract:

The treatment of magnesium-based desulfurization products was concentrated on wet magnesium-based desulfurization products, and few reported on the treatment and utilization of semi-dry magnesium-based desulfurization products. In order to solve this problem, the semi-dry magnesium-based desulfurization product was soaked in water. The effects of soaking times, soaking temperature and soaking time on the desulfurization products were studied. The products were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray fluorescence spectrometer (XRF).The results showed that the desulfurization products were divided into three parts after water immersion: aqueous solution, solid mass and sediment. The solute is magnesium chloride and magnesium sulfate in the solution, magnesium sulfate and magnesium chloride obtained in the first soaking account for 8.85% of the solution mass, which is much higher than 2.33% of the second soaking. When the immersion temperature is 70℃, the obtained magnesium sulfate and magnesium chloride are 0.14 to 3% more than room temperature and 50℃, there is almost no change in the density of the solution after soaking for three days. The solid mass is composed of Mg(OH)₂ and a small amount of sulfate and chloride. The component of the sediment is Mg(OH)₂. The water soaking treatment can complete the reuse of the desulfurization products.

Key words: desulfurization product, soaking, recovery, magnesium sulfate, magnesium chloride hexahydrate, magnesium hydroxide

中图分类号:

X705

曲迪,高桂林,丁涵,曹大力. 半干法镁基脱硫产物的水浸处理[J]. 化工进展, 2019, 38(10): 4767-4772.

Di QU,Guilin GAO,Han DING,Dali CAO. Water soaking treatment of semi-dry magnesium desulfurization products[J]. Chemical Industry and Engineering Progress, 2019, 38(10): 4767-4772.

图/表 7

图1 浸泡后溶液密度变化

图2 改变用水量浸泡后溶液密度变化

图3 滤液中溶质的XRD图谱我我我a—MgSO4·4H2O； b—MgCl2·6H2O

图4 脱硫产物XRD图谱我我我a—MgSO3·6H2O；b—3Mg(OH)2·MgSO4·8H2O；c—2Mg(OH)2·MgCl2·4H2O；d—MgO；e—MgCl2·6H2O；f—Mg(OH)2；g—MgSO4·5H2O

表1 脱硫产物XRF测试结果

脱硫产物	各组分质量分数/%
脱硫产物	MgO	SO₃	Cl
未浸泡	72.96	11.08	5.28
浸泡1次	69.82	4.46	1.21
浸泡2次	69.17	2.40	0.93

图5 脱硫产物SEM图

图6 固体沉渣XRD图谱

参考文献 16

1	王小明. 干法及半干法脱硫技术[J]. 电力科技与环保, 2018, 34(1): 45-48.
	WANGXiaoming. Dry and semi-dry desulfurization technology [J]. Power Technology and Environmental Protection, 2018, 34(1): 45-48.
2	任丽. 半干法脱硫副产物烧制硫铝酸盐水泥的试验研究[D]. 济南: 山东大学, 2009.
	RENLi. Experimental study on the burning of sulphoaluminate cement by semi-dry desulfurization by-product [D]. Jinan: Shandong University, 2009.
3	FANGDean, ZHANGXuefei, XUEXiangxin. A novel resource utilization method using wet magnesia flue gas desulfurization residue for simultaneous removal of ammonium nitrogen and heavy metal pollutants from vanadium containing industrial wastewater [J]. RSC Advances, 2018, 8(66): 38013-38021.
4	WANGLidong, QITieyue, WUSiyu, et al. A green and robust solid catalyst facilitating the magnesium sulfite oxidation in the magnesia desulfurization process [J] . Journal of Materials Chemistry A, 2017, 5(17): 8018-8028.
5	董广前, 王洁. 镁法烟气脱硫技术与应用前景展望[J]. 无机盐工业, 2005, 37(1): 11-12.
	DONGGuangqian, WANGJie. Magnesium flue gas desulfurization technology and its application prospects [J]. Inorganic salt industry, 2005, 37(1): 11-12.
6	刘晋宁. 氧化镁法锅炉烟气脱硫的控制与实现[D]. 包头: 内蒙古科技大学, 2014.
	LIUJinning. Control and realization of flue gas desulfurization of magnesium oxide process boiler [D]. Baotou: Inner Mongolia University of Science and Technology, 2014.
7	张燕. 氧化镁湿法烟气脱硫工艺在锅炉上的应用[J]. 煤炭与化工, 2010, 33(10): 41-42.
	ZHANGYan. Application of magnesium oxide wet flue gas desulfurization process in boiler [J]. Coal and Chemical Industry, 2010, 33(10): 41-42.
8	赵珊珊, 李蜀庆. 重庆燃煤电厂烟气脱硫石膏综合利用前景分析[J]. 环境科学与管理, 2009, 34(4): 160-163.
	ZHAOShanshan, LIShuqing. Analysis on the prospect of comprehensive utilization of flue gas desulfurization gypsum in chongqing coal-fired power plant [J]. Environmental Science and Management, 2009, 34(4): 160-163.
9	高建明, 张云鹏, 陈吓敏, 等. 半干法烟气脱硫产物资源化利用初探[J]. 中国钢铁业, 2009(11): 33-36.
	GAOJianming, ZHANGYunpeng, CHENHemin, et al. Preliminary study on resource utilization of semi-dry flue gas desulfurization products [J]. Chinese Steel Industry, 2009(11): 33-36.
10	余欣雨. 半干法脱硫灰渣性质、组成分析及转化初步研究[D]. 武汉: 华中科技大学, 2013.
	YUXinyu. Preliminary study on properties, composition analysis and transformation of semi-dry desulfurization ash [D]. Wuhan: Huazhong University of Science and Technology, 2013.
11	张辉. 密相干塔脱硫灰的特性分析及制备蒸养砖的研究[D]. 石家庄: 河北科技大学, 2012.
	ZHANGHui. Characteristic analysis of desulfurization ash from dense column dry tower and study on preparation of steam curing brick [D]. Shijiazhuang: Hebei University of Science and Technology, 2012.
12	WANGYi, SHILin. The effects of modified flue gas desulfurization residue on growth of sweet potato and soil amelioration [J]. Water, Air, & Soil Pollution, 2015, 226(8): 245.
13	郭如新. 镁法烟气脱硫研究进展[J]. 硫磷设计与粉体工程, 2009(3): 10-14，52.
	GUORuxin. Research progress on magnesium flue gas desulfurization [J]. Phosphorus Design and Powder Engineering, 2009(3): 10-14，52.
14	史利芳, 潘利祥, 赵良庆, 等. 镁法脱硫副产物亚硫酸镁处理现状[J]. 环境工程, 2014, 32(s1): 533-536.
	SHILifang, PANLixiang, ZHAOLiangqing, et al. Current status of magnesium sulfate treatment by magnesium desulfurization by-product [J]. Environmental Engineering, 2014, 32(s1): 533-536.
15	CHENHui, GEHonghua, DOUBinlin, alet . Thermogravimetric kinetics of MgSO₃·6H₂O byproduct from magnesia wet flue gas desulfurization [J] . Energy and Fuels， 2009, 23(5): 2552-2556.
16	王月娟. 烟气脱硫技术的现状分析与应用[D]. 大庆: 东北石油大学, 2016.
	WANGYuejuan. Analysis and application of current status of flue gas desulfurization technology [D]. Daqing: Northeast Petroleum University, 2016.

[1]	李梦圆, 郭凡, 李群生. 聚乙烯醇生产中回收工段第三、第四精馏塔的模拟与优化[J]. 化工进展, 2023, 42(S1): 113-123.
[2]	马伊, 曹世伟, 王家骏, 林立群, 邢延, 曹腾良, 卢峰, 赵振伦, 张志军. 低共熔溶剂回收废旧锂离子电池正极材料的研究进展[J]. 化工进展, 2023, 42(S1): 219-232.
[3]	张杰, 王放放, 夏忠林, 赵光金, 马双忱. “双碳”目标下SF₆排放现状、减排手段分析及未来展望[J]. 化工进展, 2023, 42(S1): 447-460.
[4]	钱思甜, 彭文俊, 张先明. PET熔融缩聚与溶液解聚形成环状低聚物的对比分析[J]. 化工进展, 2023, 42(9): 4808-4816.
[5]	常印龙, 周启民, 王青月, 王文俊, 李伯耿, 刘平伟. 废弃聚烯烃的高值化学回收研究进展[J]. 化工进展, 2023, 42(8): 3965-3978.
[6]	王报英, 王皝莹, 闫军营, 汪耀明, 徐铜文. 聚合物包覆膜在金属分离回收中的研究进展[J]. 化工进展, 2023, 42(8): 3990-4004.
[7]	吕杰, 黄冲, 冯自平, 胡亚飞, 宋文吉. 基于余热回收的燃气热泵性能及控制系统[J]. 化工进展, 2023, 42(8): 4182-4192.
[8]	胡亚飞, 冯自平, 田佳垚, 宋文吉. 空气源燃气热泵系统多制热运行模式下余热回收特性[J]. 化工进展, 2023, 42(8): 4204-4211.
[9]	侯殿保, 贺茂勇, 陈育刚, 杨海云, 李海民. 资源优化配置与循环经济在钾资源开发利用中的应用[J]. 化工进展, 2023, 42(6): 3197-3208.
[10]	李若琳, 何少林, 苑宏英, 刘伯约, 纪冬丽, 宋阳, 刘博, 余绩庆, 徐英俊. 原位热解对油页岩物性及地下水水质影响探索[J]. 化工进展, 2023, 42(6): 3309-3318.
[11]	李华华, 李逸航, 金北辰, 李隆昕, 成少安. 厌氧氨氧化-生物电化学耦合废水处理系统的研究进展[J]. 化工进展, 2023, 42(5): 2678-2690.
[12]	王昊, 霍进达, 曲国瑞, 杨家琪, 周世伟, 李博, 魏永刚. 退役锂电池正极材料资源化回收技术研究进展[J]. 化工进展, 2023, 42(5): 2702-2716.
[13]	胡亚飞, 冯自平, 田佳垚, 黄冲, 宋文吉. 燃料驱动无电热泵系统的节能模拟与运行经济性分析[J]. 化工进展, 2023, 42(3): 1217-1227.
[14]	张群力, 黄昊天, 张琳, 赵文强, 张秋月. 喷淋式烟气源热泵冷凝余热回收系统性能分析[J]. 化工进展, 2023, 42(2): 650-657.
[15]	王毅斌, 冯敬武, 谭厚章, 李良钰. 市政污泥热化学处置中磷元素形态转变与回收利用研究进展[J]. 化工进展, 2023, 42(2): 985-999.