加氢原料煤焦油脱水除盐预处理工艺优化限值

doi:10.16085/j.issn.1000-6613.2022-1244

化工进展 ›› 2023, Vol. 42 ›› Issue (5): 2298-2305.DOI: 10.16085/j.issn.1000-6613.2022-1244

加氢原料煤焦油脱水除盐预处理工艺优化限值

张乐乐¹(), 钱运东¹, 朱华曈¹, 冯思龙¹, 杨秀娜², 于颖², 杨强¹, 卢浩¹()

^1.华东理工大学机械与动力工程学院，上海 200237
^2.中国石油化工股份有限公司大连石油化工研究院，辽宁大连 116045

收稿日期:2022-07-04 修回日期:2022-09-09 出版日期:2023-05-10 发布日期:2023-06-02
通讯作者: 卢浩
作者简介:张乐乐（1999—），男，硕士研究生，研究方向为非均相分离。E-mail：ecust_zll@163.com。
基金资助:
国家自然科学基金(52000072);上海市科技计划(22QA1402600)

Study on optimization limits of dehydration and desalination pretreatment of hydrogenated coal tar

ZHANG Lele¹(), QIAN Yundong¹, ZHU Huatong¹, FENG Silong¹, YANG Xiuna², YU Ying², YANG Qiang¹, LU Hao¹()

^1.School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
^2.Sinopec Dalian Research Institute of Petroleum and Petrochemicals, Dalian 116045, Liaoning, China

Received:2022-07-04 Revised:2022-09-09 Online:2023-05-10 Published:2023-06-02
Contact: LU Hao

摘要/Abstract

摘要：

原料煤焦油的脱水除盐预处理是保障后续加氢反应持久运行及装置安全的关键，而煤焦油的特殊物性及复杂组成导致当前预处理系统普遍存在效果差、调控困难的问题。以某大型煤焦油加氢装置预处理流程为基础，本文研究了预处理装置的脱水效果、除盐效果两个关键因素，首先分析了非热物理分离的脱水和除盐限值，进一步通过纤维聚结器与强化沉降器组合的中试测试，获得了聚结沉降分离限值、洗盐器级数和注水量的影响规律，在注水量6%、洗盐器三级串联、纤维聚结表观流速0.003m/s、沉降停留时间60min以上的最优条件下，煤焦油含水量降为3.1%、含盐量降为2.81mg/kg，均接近理论分离极限，为预处理装置的工艺设计及操作优化提供了新思路。

关键词: 煤焦油, 预处理, 脱水除盐, 洗涤, 纤维聚结, 强化沉降器

Abstract:

Pretreatment of coal tar by dehydration and desalination is the key to ensure the lasting operation of the subsequent hydrogenation reaction and the safety of the equipment. However, the special properties and the complex composition of coal tar lead to the bad performance and the difficulty of regulation in the current pretreatment system. Based on the pretreatment process of a large coal tar hydrogenation unit, the two key factors of the dehydration effect and the desalination effect were studied. Firstly, the dehydration and desalination limits of non-thermophysical separation were analyzed. Moreover, the pilot test of the combination of a fiber coalescence separator and an enhanced sedimentation device was conducted to obtain the separation limit of coalescence and sedimentation and evaluate the influence of salt washer series and water injection rate. Under the optimal conditions of 6% water injection rate, three-stage salt washers in series, 0.003m/s superficial velocity of the fiber coalescence and the settling residence time of more than 60min, the water content of coal tar was reduced to 3.1% and the salt content was reduced to 2.81mg/kg, both of which were close to the theoretical separation limit. The results would provide a new idea for the process design and operational optimization of the pretreatment unit.

Key words: coal tar, pretreatment, dehydration and desalination, washing, fiber coalescence, reinforced settling equipment

中图分类号:

TQ524

张乐乐, 钱运东, 朱华曈, 冯思龙, 杨秀娜, 于颖, 杨强, 卢浩. 加氢原料煤焦油脱水除盐预处理工艺优化限值[J]. 化工进展, 2023, 42(5): 2298-2305.

ZHANG Lele, QIAN Yundong, ZHU Huatong, FENG Silong, YANG Xiuna, YU Ying, YANG Qiang, LU Hao. Study on optimization limits of dehydration and desalination pretreatment of hydrogenated coal tar[J]. Chemical Industry and Engineering Progress, 2023, 42(5): 2298-2305.

图/表 8

图1 原料煤焦油预处理工艺流程

表1 原料煤焦油主要性质及组成

项目	数值
密度(20℃)/g·cm^-3	1.03~1.038
运动黏度(80℃)/mm²·s^-1	14.1
凝点/℃	24
含盐量/mg·kg^-1	9.3~20
含水量（质量分数）/%	2.55~4
重金属/μg·g^-1	100~500
机械杂质/%	0.4~2
四组分族组成分析/%
饱和烃	10
芳烃	20
胶质	45
沥青质	25
馏程（模拟蒸馏）/℃
初馏点（IBP）/10%	156/218
30%/50%	295/359
70%/90%	416/555
95%/干点（EBP）	—/750

图2 注水量对脱水除盐效果的影响的模拟测试

图3 试验装置及流程图

图4 强化沉降罐沉降时间对脱水除盐效果的影响

图5 纤维聚结表观流速对脱水除盐效果的影响

图6 洗盐器串联级数对脱水除盐效果的影响

图7 注水量对脱水除盐效果的影响

参考文献 18

6	颜丙峰, 王光耀, BAUMAN R. 煤焦油重馏分与煤共处理加氢液化性能研究[J]. 煤炭科学技术, 2016, 44(S1): 194-196.
	YAN Bingfeng, WANG Guangyao, BAUMAN R. Study on liquefaction behavior of coal-tar heavy fractions and coal co-processing[J]. Coal Science and Technology, 2016, 44(S1): 194-196.
7	次东辉, 王锐, 崔鑫, 等. 煤焦油中金属元素的危害及脱除技术[J]. 煤化工, 2016, 44(5): 29-32.
	Donghui CI, WANG Rui, CUI Xin, et al. Hazards of metal elements in coal tar and removal technology[J]. Coal Chemical Industry, 2016, 44(5): 29-32.
8	唐应彪. 低温煤焦油预处理技术研究[J]. 石油化工腐蚀与防护, 2021, 38(6): 13-17.
	TANG Yingbiao. Study on pretreatment of low temperature coal tar[J]. Corrosion & Protection in Petrochemical Industry, 2021, 38(6): 13-17.
9	谢全安, 冯兴磊, 郭欣, 等. 煤焦油脱水技术进展[J]. 化工进展, 2010, 29(S1): 345-348.
	XIE Quan’an, FENG Xinglei, GUO Xin. Advances in coal tar dehydration technology[J]. Chemical Industry and Engineering Progress, 2010, 29(S1): 345-348.
10	赵荣. 煤焦油加氢原料中有害组分的预处理工艺[J]. 上海化工, 2016, 41(5): 34-37.
	ZHAO Rong. Pretreatment process of harmful components in the coal tar for hydrogenation[J]. Shanghai Chemical Industry, 2016, 41(5): 34-37.
11	金平, 杨秀娜, 阮宗琳, 等. 煤焦油原料脱水除盐过程研究及动力学模型验证[J]. 石油炼制与化工, 2019, 50(2): 95-99.
	JIN Ping, YANG Xiuna, RUAN Zonglin, et al. Dynamic model and verification on deep dewatering and desalting process for coal tar feedstock[J]. Petroleum Processing and Petrochemicals, 2019, 50(2): 95-99.
12	刘艳丽, 刘戈. 煤化工行业高水耗问题分析与探讨[J]. 煤炭科学技术, 2016, 497(4): 189-195.
1	吴乐乐, 戴鑫, 李金璐, 等. 煤焦油常压渣油悬浮床加氢工艺及中试研究[J]. 石油炼制与化工, 2015, 46(8): 18-23.
	WU Lele, DAI Xin, LI Jinlu, et al. Research on coal tar atmospheric residue hydrocracking in slurry-bed and pilot scale test[J]. Petroleum Processing and Petrochemicals, 2015, 46(8): 18-23.
2	朱豫飞. 煤焦油加氢转化技术[J]. 洁净煤技术, 2014, 20(3): 43-48.
	ZHU Yufei. Hydro-conversion technologies of coal tar[J]. Clean Coal Technology, 2014, 20(3): 43-48.
3	孟兆会, 方向晨, 杨涛, 等. 沸腾床与固定床组合工艺加氢处理煤焦油试验研究[J]. 煤炭科学技术, 2015, 43(3): 134-137.
	MENG Zhaohui, FANG Xiangchen, YANG Tao, et al. Experiment study on fluidized bed and fixed bed combined technique hydrogenation to process coal tar[J]. Coal Science and Technology, 2015, 43(3): 134-137.
4	李珍, 李稳宏, 胡静, 等. 中低温煤焦油加氢技术对比与分析[J]. 应用化工, 2012, 41(2): 337-340.
	LI Zhen, LI Wenhong, HU Jing, et al. Comparison and analysis of low-temperature coal tar hydrogenation technology[J]. Applied Chemical Industry, 2012, 41(2): 337-340.
5	孙国权, 姚春雷, 全辉, 等. 中低温煤焦油加氢生产清洁燃料技术的开发及工业应用[J]. 石油炼制与化工, 2015, 46(8): 12-17.
	SUN Guoquan, YAO Chunlei, QUAN Hui, et al. Development and commercialization of clean fuel production technology from medium and low temperature coal tars[J]. Petroleum Processing and Petrochemicals, 2015, 46(8): 12-17.
12	LIU Yanli, LIU Ge. Analysis and discussion on high water consumption problem of coal chemical industry[J]. Coal Science and Technology, 2016, 497(4): 189-195.
13	张军明, 郝学民, 苏桂娟, 等. 三相卧螺离心机在焦油预处理过程的应用[J]. 化学工程与装备, 2008(6): 72-74.
	ZHANG Junming, HAO Xuemin, SU Guijuan, et al. Application of three-phase decanter centrifuge in tar pretreatment process[J]. Chemical Engineering & Equipment, 2008(6): 72-74.
14	刘纾言, 王鑫, 孙鹏. 中低温煤焦油电脱盐处理技术研究[J]. 当代化工, 2017, 46(9): 1786-1788.
	LIU Shuyan, WANG Xin, SUN Peng. Study on desalination technology of moderate-low temperature coal tar[J]. Contemporary Chemical Industry, 2017, 46(9): 1786-1788.
15	杨强, 许萧, 卢浩, 等. 一种适用于油水深度分离的Ω型纤维编织方法: CN103952852A[P]. 2014-07-30.
	YANG Qiang, XU Xiao, LU Hao, et al. An Ω-type fiber braiding method suitable for deep separation of oil and water: CN103952852A[P]. 2014-07-30.
16	LU Hao, PAN Zhicheng, WANG Hualin, et al. Fiber coalescence treatment of oily wastewater: A new theory and application[J]. Journal of Hazardous Materials, 2021, 412: 125188.
17	LU Hao, YANG Qiang, LIU Sen, et al. Effect of fibrous coalescer redispersion on W/O emulsion separation[J]. Separation and Purification Technology, 2016, 159: 50-56.
18	孙盖南, 刘懿谦, 卢浩, 等. 新型纤维聚结污水除油技术实验及应用研究[J]. 水处理技术, 2019, 45(9): 110-114.
	SUN Gainan, LIU Yiqian, LU Hao, et al. Experiment and application study on a novel fibrous coalescence technique for oily sewage treatment[J]. Technology of Water Treatment, 2019, 45(9): 110-114.

[1]	罗成, 范晓勇, 朱永红, 田丰, 崔楼伟, 杜崇鹏, 王飞利, 李冬, 郑化安. 中低温煤焦油加氢反应器不同分配器中液体分布的CFD模拟[J]. 化工进展, 2023, 42(9): 4538-4549.
[2]	李由, 吴越, 钟禹, 林琦璇, 任俊莉. 酸性熔盐水合物预处理麦秆高效制备木糖及其对酶解效率的影响[J]. 化工进展, 2023, 42(9): 4974-4983.
[3]	杨莹, 侯豪杰, 黄瑞, 崔煜, 王兵, 刘健, 鲍卫仁, 常丽萍, 王建成, 韩丽娜. 利用煤焦油中酚类物质Stöber法制备碳纳米球用于CO₂吸附[J]. 化工进展, 2023, 42(9): 5011-5018.
[4]	吴和平, 曹宁, 徐圆圆, 曹云波, 李裕东, 杨强, 卢浩. 氢氟酸与烷基化油快速分离[J]. 化工进展, 2023, 42(6): 2845-2853.
[5]	徐贤, 崔楼伟, 刘杰, 施俊合, 朱永红, 刘姣姣, 刘涛, 郑化安, 李冬. 原料组成对半焦中间相结构发展的影响[J]. 化工进展, 2023, 42(5): 2343-2352.
[6]	韩明阳, 乔慧, 付佳铭, 马泽雯, 王妍, 欧阳嘉. 非水溶剂预处理木质纤维原料研究进展[J]. 化工进展, 2022, 41(8): 4086-4097.
[7]	阮敏, 孙宇桐, 黄忠良, 李辉, 张轩, 吴希锴, 赵成, 姚世蓉, 张拴保, 张巍, 黄兢. 污泥预处理-厌氧消化体系的能源经济性评价[J]. 化工进展, 2022, 41(3): 1503-1516.
[8]	解先利, 刘云云, 余强, 张宇, 张荣清, 邱雨心. 低共熔溶剂预处理提高甘草渣酶解效果优化[J]. 化工进展, 2022, 41(3): 1349-1356.
[9]	王娜, 宋秀兰, 昝博韬. 复合菌群利用模拟APG协同FNA预处理剩余污泥水解液合成PHA[J]. 化工进展, 2022, 41(2): 1017-1024.
[10]	杨永斌, 董寅瑞, 钟强, 李骞, 王林, 姜涛. 高温煤焦油沥青黏结剂碳化固结作用在炭质型材中的应用与研究进展[J]. 化工进展, 2022, 41(12): 6419-6429.
[11]	王艺霖, 李诗杰. 盐酸预处理对浒苔基活性炭电化学性能的影响[J]. 化工进展, 2022, 41(12): 6454-6460.
[12]	刘乾静, 陈晓淼, 王芷, 史吉平, 李保国, 刘莉. 低共熔溶剂预处理杨木水解渣拆解木质素[J]. 化工进展, 2022, 41(10): 5612-5618.
[13]	张强, 陈诗阳. 氧气辅助湿热预处理对玉米秸秆酒精发酵的影响[J]. 化工进展, 2022, 41(1): 161-165.
[14]	张军保, 王忠凯, 刘彪, 张晓晖, 刘冠美. 大颗粒尿素造粒尾气冷却洗涤器技术应用进展[J]. 化工进展, 2021, 40(S2): 15-19.
[15]	聂煜东, 李金, 张贤明. 水处理过程中膜污染问题及其预处理技术研究进展[J]. 化工进展, 2021, 40(4): 2278-2289.

加氢原料煤焦油脱水除盐预处理工艺优化限值

Study on optimization limits of dehydration and desalination pretreatment of hydrogenated coal tar

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 8

参考文献 18

相关文章 15

编辑推荐

Metrics

本文评价