焦化脱硫废盐在水-乙醇体系下溶析提纯

梁转转; 杨艳青; 高远; 张艳荣; 张卫珂

doi:10.13205/j.hjgc.202211013

焦化脱硫废盐在水-乙醇体系下溶析提纯

doi: 10.13205/j.hjgc.202211013

1. 太原理工大学环境科学与工程学院, 太原 030024;
2. 太原理工大学材料科学与工程学院, 太原 030024

基金项目:

山西省重点研发计划（201803D31049）

详细信息

作者简介:
梁转转(1996-),女,硕士,主要研究方向为固体废弃物的资源化利用。2521263063@qq.com

通讯作者:
杨艳青,女,讲师。yangyanqing@tyut.edu.cn

计量
- 文章访问数: 114
- HTML全文浏览量: 23
- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2022-04-08
- 网络出版日期: 2023-03-24

PURIFICATION OF COKING DESULFURIZATION WASTE SALT UNDER A WATER-ETHANOL SYSTEM

1. School of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
2. School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

摘要

摘要: 基于硫氰酸钠（NaSCN）和硫代硫酸钠（Na₂S₂O₃）在水-乙醇体系下的溶解度，通过脱色与水-乙醇体系分溶分离法对焦化厂2类脱硫混盐进行分盐提纯，得到纯度为94%~96%的NaSCN产品及纯度为95%~98%的Na₂S₂O₃产品，其中第一类废盐（白色，改良ADA脱硫法）中NaSCN和Na₂S₂O₃的回收率分别为90.8%和68.3%，第二类废盐（绿色，PDS脱硫法）中NaSCN和Na₂S₂O₃的回收率分别为91.3%和81.8%。通过XRD、TG-DSC以及FT-IR等表征手段分析发现，经过水-乙醇体系分溶分离法提纯分离后的产品接近市售的纯NaSCN和Na₂S₂O₃的品质。因此，水-乙醇体系可以代替无水乙醇、甲醇等纯溶剂对废盐进行分离提纯，且操作过程相对安全；此外，与分步结晶工艺相比，该工艺具有产品纯度高、耗能少等优点。因此，脱色与水-乙醇体系分溶分离法对焦化脱硫废盐的资源化利用具有一定的理论和实践参考价值。
- 焦化脱硫废盐 /
- 改良ADA脱硫法 /
- PDS脱硫法 /
- 水-乙醇体系 /
- 硫氰酸钠 /
- 硫代硫酸钠
Abstract: Based on the analysis of solubility of sodium thiocyanate (NaSCN) and sodium thiosulfate (Na₂S₂O₃) under a water-ethanol system, two types of desulfurization mixed salts in the coking plant were chosen for further purification and separation through decolorization and water-ethanol system separation method. NaSCN products with a purity of 94% to 96%, and Na₂S₂O₃ products with a purity of 95% to 98% were obtained respectively. Among them, the recoveries of NaSCN and Na₂S₂O₃ in the first type of waste salt (white, improved ADA desulfurization method) were 90.8% and 68.3%, respectively, and the recoveries of them in the other waste salt (green, PDS desulfurization method) were 91.3% and 81.8%, respectively. Besides, desulphurization waste salt and products were detected and analyzed by XRD, TG-DSC and FT-IR, which showed that the quality of the products by the water-ethanol system separation method was similar to that of commercially available NaSCN and Na₂S₂O₃. Hence, instead of absolute ethyl alcohol, carbinol and other pure solvents, the water-ethanol system made the operational process relatively safer. In addition, compared with the step crystallization process, the method had the advantages of high purity of products, less energy consumption. Therefore, the water-ethanol system separation method had certain theoretical value and practical significance for the resource utilization of coking desulfurization waste salt.
- coking desulfurization waste salt /
- improved ADA desulfurization method /
- PDS desulfurization method /
- water-ethanol system /
- sodium thiocyanate /
- sodium thiosulfate

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参考文献(25)

[1]	王毓明. 2000 t/a硫氰酸钠新工艺运行总结[J]. 化肥设计, 2018, 56(1):39-41.
[2]	李灿. PDS脱硫工艺的副盐分析及吸收研究[D]. 青岛:青岛科技大学, 2017.
[3]	王捷. 超临界Ir-Ta催化氧化降解焦化脱硫废液的研究[D]. 武汉:武汉科技大学, 2016.
[4]	LI C, LI G Q, ZHANG S T, et al. Study on the pyrolysis treatment of HPF desulfurization wastewater using high-temperature waste heat from the raw gas from a coke oven riser[J]. RSC Advances,2018, 8(54):30652-30660.
[5]	王华东. 焦化脱硫废液资源化技术的应用进展[J]. 中国化工贸易, 2019, 11(4):128.
[6]	马国强, 刘新强. 山西省独立焦化企业可持续发展对策研究[J]. 煤炭经济研究, 2019, 39(8):25-29.
[7]	赵雅思, 杨兴舟, 叶国杰, 等. 焦化废水处理过程中固相物质的形成及处置方法评价[J]. 环境科学学报, 2020, 40(7):2548-2556.
[8]	王涛, 余德阳, 陈宇,等. 氨法脱硫废液资源化利用的研究进展[J]. 化学与生物工程, 2018, 35(9):9-13.
[9]	YIN N, ZHONG Z X, XING W H. Ceramic membrane fouling and cleaning in ultrafiltration of desulfurization wastewater[J]. Desalination, 2013, 319(10):92-98.
[10]	YIN N, WANG K, ZHONG Z, et al. Ceramic micro/ultra-filtration of low-concentration ultrafine sulfur in desulfurization wastewater[J]. Journal of Chemical Technology & Biotechnology, 2016, 91(12):3088-3095.
[11]	ZHANG X, YE C, PI K, et al. Sustainable treatment of desulfurization wastewater by ion exchange and bipolar membrane electrodialysis hybrid technology[J]. Separation and Purification Technology, 2019, 211:330-339.
[12]	何龙, 王光华, 李文兵, 等. 焦化脱硫废液喷雾干燥提盐洁净技术研究[J]. 工业安全与环保, 2019, 45(1):90-94.
[13]	段素兰, 马兴敏, 刘君红. 焦炉煤气HPF脱硫废液无害化处理技术[J]. 冶金动力, 2013(9):15-17.
[14]	张亚峰, 安路阳, 张立涛, 等. 焦化脱硫废液提盐技术进展[J]. 煤炭加工与综合利用, 2017(6):46-52.
[15]	付本全, 张垒, 王丽娜, 等. 国内焦炉煤气脱硫废液处理研究进展[J]. 武钢技术, 2014, 5(24):46-50.
[16]	陈日辉, 闫文静. 酒精罐区的火灾爆炸事故树分析及预防措施[J]. 安全与环境学报, 2017, 17(6):2055-2059.
[17]	陈钦佩. 常压和低压下水含量对液体燃料火灾危险性影响机理研究[D]. 合肥:中国科学技术大学,2018.
[18]	SOARES R B, PESSOA F L P, MENDES M F. Dehydration of ethanol with different salts in a packed distillation column[J]. Process Safety and Environmental Protection, 2015, 93:147-153:147.
[19]	FU H X, SUN Y Q, TENG H, et al. Salting-out extraction of carboxylic acids[J]. Separation and Purification Technology, 2015, 139:36-42.
[20]	杨亚鸣, 范章豪, 吴淑晶, 等. 加盐萃取精馏分离乙醇-水体系的研究进展[J]. 河南化工, 2014, 31(10):21-23.
[21]	ZHUANG B, RAMANAUSKAITE G, KOA Z Y, et al. Like dissolves like:a first-principles theory for predicting liquid miscibility and mixture dielectric constant[J]. Science Advances, 2021, 7(7).
[22]	李秀清. 焦化脱硫废水催化氧化预处理与体系相平衡研究[D]. 长沙:湖南大学,2018.
[23]	化学试剂五水合硫代硫酸钠(硫代硫酸钠):GB/T 637-2006[S].
[24]	王宏. 焦化脱硫废液回收工艺研究[D]. 青岛:山东科技大学, 2016.
[25]	刘良彬, 宋景文. 酒精和酒的着火爆炸及其消防措施[J]. 中国消防, 1984, 4(2):9-11.