Development and application of deacidification technology in domestic sulfuric acid alkylation refining system

doi:10.16085/j.issn.1000-6613.2021-2148

Abstract

Abstract:

Alkylated oil is the key blending component for the quality upgrade of the Ⅵ gasoline, and its market demand and production capacity in China continue to increase. The quality of alkylation products and the cleanliness of the production process are the keys of alkylation development. This paper reviews the current status of treatment technology of sulfuric acid alkylation effluent. It briefly describes the traditional wet treatment STARCTCO process by acid washing, alkaline washing and water washing, and highlights the engineering development and successful application of fiber reinforced coalescence separation technology in domestic SINOALKY process. Based on the experimental research and the sideline test, the multi-stage fine coalescence dry treatment technology was developed. The application of dry deacidification in refining system significantly reduces the energy consumption and related environmental pollution, and hence contributes to the green and low-carbon development of alkylation technology in China.

Key words: sulfuric acid alkylation, SINOALKY process, emulsions, coalescence, separation, pollution and carbon reduction

摘要：

烷基化油是国Ⅵ汽油质量升级的关键调和组分，在国内市场的需求量和产能不断扩大的情形下，如何提高烷基化产品的质量和生产过程的清洁是烷基化发展的重点方向。本文综述了硫酸法烷基化反应流出物处理技术现状，简述了STARCTCO工艺中传统酸洗、碱洗、水洗湿式处理技术流程，并重点介绍了纤维强化聚结分离技术在国产SINOALKY工艺中的工程开发及成功应用。基于实验研究和侧线试验，在国产硫酸法烷基化反应流出物处理领域开发出多级精细聚结干式处理技术。精制系统中干式脱酸技术的开发与应用显著降低了能耗和相关环境污染，提高了装置的环保性，有助于我国烷基化技术的绿色低碳发展。

关键词: 硫酸法烷基化, SINOALKY工艺, 乳液, 聚结, 分离, 减污降碳

CLC Number:

TQ028.4

LU Zhaojin, REN Guanwei, LYU Fuwei, DONG Xiao, BAI Zhishan. Development and application of deacidification technology in domestic sulfuric acid alkylation refining system[J]. Chemical Industry and Engineering Progress, 2022, 41(3): 1430-1439.

鲁朝金, 任官伟, 吕福炜, 董霄, 白志山. 国产硫酸法烷基化精制系统中脱酸技术开发与应用[J]. 化工进展, 2022, 41(3): 1430-1439.

Figures/Tables 10

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项目	CDAlky工艺	SINOALKY工艺	STARCTCO工艺	EMER工艺
催化剂	硫酸	硫酸	硫酸	硫酸
反应温度	-4~-1℃	-2~4℃	4~8℃	2~13℃
反应器型式	立式填料反应器	N形多段静态混合反应器	偏心卧式搅拌反应器	分段搅拌反应器
进料方式	一次进料	多点进料	一次进料	多点进料
反应流出物	乳化程度较低，副产物少，酸滴粒径分布窄	乳化程度较低，副产物少，酸滴粒径分布窄	乳化程度高，副产物多，酸滴粒径分布宽	乳化程度高，副产物多，酸滴粒径分布宽
酸烃分离设备	三级聚结器、第一级酸洗	闪蒸取热罐、酸烃聚结分离罐、两级精细聚结分离器；备用碱洗罐、水洗罐	酸洗罐、碱洗罐、水洗罐	沉降罐、碱洗罐、水洗罐
反应流出物处理方式	干式：三级聚结分离，第一级酸洗	干式和湿式并存。干式：酸烃聚结分离+两级精细聚结分离；湿式：碱洗、水洗	湿式：酸洗、碱洗、水洗	湿式：重力沉降+碱洗、水洗

项目	CDAlky工艺	SINOALKY工艺	STARCTCO工艺	EMER工艺
催化剂	硫酸	硫酸	硫酸	硫酸
反应温度	-4~-1℃	-2~4℃	4~8℃	2~13℃
反应器型式	立式填料反应器	N形多段静态混合反应器	偏心卧式搅拌反应器	分段搅拌反应器
进料方式	一次进料	多点进料	一次进料	多点进料
反应流出物	乳化程度较低，副产物少，酸滴粒径分布窄	乳化程度较低，副产物少，酸滴粒径分布窄	乳化程度高，副产物多，酸滴粒径分布宽	乳化程度高，副产物多，酸滴粒径分布宽
酸烃分离设备	三级聚结器、第一级酸洗	闪蒸取热罐、酸烃聚结分离罐、两级精细聚结分离器；备用碱洗罐、水洗罐	酸洗罐、碱洗罐、水洗罐	沉降罐、碱洗罐、水洗罐
反应流出物处理方式	干式：三级聚结分离，第一级酸洗	干式和湿式并存。干式：酸烃聚结分离+两级精细聚结分离；湿式：碱洗、水洗	湿式：酸洗、碱洗、水洗	湿式：重力沉降+碱洗、水洗

项目	年节约量/t	单价/CNY	总费用/×10⁴CNY
电	708610kW·h	0.54	38.26
除盐水	52920	14.57	77.10
1.0MPa蒸汽	8400	186.23	156.43
含盐污水	58800	8.50	49.98
系统碱液	60	960.00	5.76
废酸量	1344	1400.00	188.16
新鲜水	5880	4.90	2.88
年经济效益	—	—	518.57

项目	年节约量/t	单价/CNY	总费用/×10⁴CNY
电	708610kW·h	0.54	38.26
除盐水	52920	14.57	77.10
1.0MPa蒸汽	8400	186.23	156.43
含盐污水	58800	8.50	49.98
系统碱液	60	960.00	5.76
废酸量	1344	1400.00	188.16
新鲜水	5880	4.90	2.88
年经济效益	—	—	518.57

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