化工学报 ›› 2021, Vol. 72 ›› Issue (3): 1473-1479.DOI: 10.11949/0438-1157.20201877
收稿日期:
2020-12-15
修回日期:
2020-12-21
出版日期:
2021-03-05
发布日期:
2021-03-05
通讯作者:
杨敏博
作者简介:
李振东(1996—),男,硕士研究生,基金资助:
LI Zhendong1(),YANG Minbo1(),FENG Xiao1,WANG Yufei2
Received:
2020-12-15
Revised:
2020-12-21
Online:
2021-03-05
Published:
2021-03-05
Contact:
YANG Minbo
摘要:
随着世界原油含硫化,炼厂脱硫溶剂的循环量不断增加,导致溶剂再生部分能耗剧增。使用Aspen HYSYS对一组脱硫单元进行了模拟,得出该脱硫系统最小的脱硫溶剂循环量。在此基础上,提出了串联操作和串并联操作两种改造方法,并分别使用这两种方法对现行的脱硫系统进行了改造。结果表明,两种改造方法可以使贫胺液的循环量分别减少8.82%和10.01%,取得了良好的经济效益。最后,分析和讨论这两种方法的优缺点,为炼厂脱硫系统的优化提供方向和建议。
中图分类号:
李振东, 杨敏博, 冯霄, 王彧斐. 炼厂脱硫系统的模拟和改造[J]. 化工学报, 2021, 72(3): 1473-1479.
LI Zhendong, YANG Minbo, FENG Xiao, WANG Yufei. Simulation and retrofit of desulfurization system in refinery[J]. CIESC Journal, 2021, 72(3): 1473-1479.
单元 | 塔顶压力/ kPa | 塔底压力/ kPa | 塔板数 | 进料流量/(kmol·h-1) | 脱硫目标/ kPa |
---|---|---|---|---|---|
U101 | 2850 | 2950 | 10 | 120.5 | 0.056 |
U102 | 1570 | 1650 | 10 | 2125 | 0.041 |
U103 | 6280 | 6330 | 18 | 3944 | 0.647 |
U104 | 12000 | 12050 | 10 | 5453 | 15.816 |
U105 | 11600 | 11650 | 16 | 7058 | 48.72 |
表1 各个脱硫单元的操作参数
Table 1 Operating parameters of each desulfurization unit
单元 | 塔顶压力/ kPa | 塔底压力/ kPa | 塔板数 | 进料流量/(kmol·h-1) | 脱硫目标/ kPa |
---|---|---|---|---|---|
U101 | 2850 | 2950 | 10 | 120.5 | 0.056 |
U102 | 1570 | 1650 | 10 | 2125 | 0.041 |
U103 | 6280 | 6330 | 18 | 3944 | 0.647 |
U104 | 12000 | 12050 | 10 | 5453 | 15.816 |
U105 | 11600 | 11650 | 16 | 7058 | 48.72 |
单元 | 组成/%(mol) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
CH4 | C2H6 | C3H8 | i-C4H10 | n-C4H10 | H2S | H2O | MDEA | H2 | C6H14 | C5H12 | |
U101 | 10.64 | 7.87 | 5.4 | 2.26 | 0.55 | 0.2 | 0 | 0 | 72.28 | 0.8 | 0 |
U102 | 6.21 | 3.12 | 0 | 0 | 0 | 0.2 | 0 | 0 | 90.47 | 0 | 0 |
U103 | 10.16 | 4.28 | 1.74 | 0.3 | 0.37 | 1.98 | 0.16 | 0 | 80.51 | 0.2 | 0.3 |
U104 | 6.15 | 2.89 | 1.81 | 0.76 | 0.19 | 0.34 | 0 | 0 | 87.3 | 0.54 | 0.02 |
U105 | 1.99 | 0.07 | 0.04 | 0.02 | 0.01 | 2.64 | 0 | 0 | 95.22 | 0.01 | 0 |
贫胺液 | 0 | 0 | 0 | 0 | 0 | 0.07 | 93.85 | 6.08 | 0 | 0 | 0 |
表2 原料气和贫胺液的组成
Table 2 Compositions of feed gas and lean amine solution
单元 | 组成/%(mol) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
CH4 | C2H6 | C3H8 | i-C4H10 | n-C4H10 | H2S | H2O | MDEA | H2 | C6H14 | C5H12 | |
U101 | 10.64 | 7.87 | 5.4 | 2.26 | 0.55 | 0.2 | 0 | 0 | 72.28 | 0.8 | 0 |
U102 | 6.21 | 3.12 | 0 | 0 | 0 | 0.2 | 0 | 0 | 90.47 | 0 | 0 |
U103 | 10.16 | 4.28 | 1.74 | 0.3 | 0.37 | 1.98 | 0.16 | 0 | 80.51 | 0.2 | 0.3 |
U104 | 6.15 | 2.89 | 1.81 | 0.76 | 0.19 | 0.34 | 0 | 0 | 87.3 | 0.54 | 0.02 |
U105 | 1.99 | 0.07 | 0.04 | 0.02 | 0.01 | 2.64 | 0 | 0 | 95.22 | 0.01 | 0 |
贫胺液 | 0 | 0 | 0 | 0 | 0 | 0.07 | 93.85 | 6.08 | 0 | 0 | 0 |
脱硫单元 | 最小贫胺液/ (kmol·h-1) | 脱后气体硫化氢分压/kPa | 脱硫目标/kPa | 相对误差/% |
---|---|---|---|---|
U101 | 14 | 0.054 | 0.056 | 3.6 |
U102 | 355 | 0.039 | 0.041 | 4.9 |
U103 | 1623 | 0.634 | 0.647 | 2.0 |
U104 | 305 | 15.264 | 15.816 | 3.5 |
U105 | 2600 | 48.488 | 48.720 | 0.5 |
总计 | 4897 | — | — | — |
表3 各个脱硫单元的最小贫胺液量
Table 3 Minimum amount of lean amine solution in each desulfurization unit
脱硫单元 | 最小贫胺液/ (kmol·h-1) | 脱后气体硫化氢分压/kPa | 脱硫目标/kPa | 相对误差/% |
---|---|---|---|---|
U101 | 14 | 0.054 | 0.056 | 3.6 |
U102 | 355 | 0.039 | 0.041 | 4.9 |
U103 | 1623 | 0.634 | 0.647 | 2.0 |
U104 | 305 | 15.264 | 15.816 | 3.5 |
U105 | 2600 | 48.488 | 48.720 | 0.5 |
总计 | 4897 | — | — | — |
脱硫单元 | 串联操作 | 串并联操作 | 现行系统 | |||
---|---|---|---|---|---|---|
贫胺液/ (kmol·h-1) | 脱后气体硫化氢分压/kPa | 贫胺液/ (kmol·h-1) | 脱后气体硫化氢分压/kPa | 贫胺液/ (kmol·h-1) | 脱硫目标/kPa | |
U101 | 4465 | 0.014 | 14 | 0.054 | 14 | 0.056 |
U102 | 0 | 0.016 | 355 | 0.039 | 355 | 0.041 |
U103 | 0 | 0.082 | 1623 | 0.634 | 1623 | 0.647 |
U104 | 0 | 7.800 | 305 | 15.264 | 305 | 15.816 |
U105 | 0 | 48.488 | 2110 | 48.488 | 2600 | 48.720 |
总计 | 4465 | — | 4407 | — | 4897 | — |
表4 两种操作方式的结果
Table 4 The results of two operation modes
脱硫单元 | 串联操作 | 串并联操作 | 现行系统 | |||
---|---|---|---|---|---|---|
贫胺液/ (kmol·h-1) | 脱后气体硫化氢分压/kPa | 贫胺液/ (kmol·h-1) | 脱后气体硫化氢分压/kPa | 贫胺液/ (kmol·h-1) | 脱硫目标/kPa | |
U101 | 4465 | 0.014 | 14 | 0.054 | 14 | 0.056 |
U102 | 0 | 0.016 | 355 | 0.039 | 355 | 0.041 |
U103 | 0 | 0.082 | 1623 | 0.634 | 1623 | 0.647 |
U104 | 0 | 7.800 | 305 | 15.264 | 305 | 15.816 |
U105 | 0 | 48.488 | 2110 | 48.488 | 2600 | 48.720 |
总计 | 4465 | — | 4407 | — | 4897 | — |
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