Mechanical design and hydraulics simulation of a new complex internal heat integrated distillation column

doi:10.11949/0438-1157.20191300

Abstract

Abstract:

In this paper, based on the theory of HIDiC and the results of Aspen simulation, a new type of internal energy integration distillation structure was established, CFD simulation was conducted for the composite HIDiC with structures of sieve hole type, hydraulics properties under different parameters were explored, and the HIDiC structure was optimized. The results show that reducing the hole of the tray and the height of the exit weir can improve the effect of mass transfer and heat transfer. SolidWorks software was used to conduct static stress analysis on the dual effects of temperature and pressure. Through HIDiC theory, model construction, and mutual verification of hydraulic simulation, the theory of HIDiC heat transfer from plate to plate was perfectly combined with the actual model.

Key words: energy integration, rectification, mechanical design, composite sieve tray, statics analysis, hydraulics simulation

摘要：

基于HIDiC的理论和Aspen 模拟的结果，建立了新型内部能量集成的精馏塔的塔节结构，对筛孔式结构的复合HIDiC塔节做了CFD模拟，探索了不同参数下的水力学性能，优化了新型复合塔节的结构。结果表明：对于筛孔式复合塔节，减小塔板孔径，降低出口堰高有利于提高传质和传热效果。利用SolidWorks软件针对温度与压力下的双重效应做了静应力分析，通过HIDiC理论，模型构建，水力学模拟相互验证，将HIDiC逐板换热的理论与实际模型完美结合。

关键词: 能量集成, 精馏, 机械设计, 筛孔式复合塔节, 静力学分析, 水力学模拟

CLC Number:

TQ 051.8

Hong LIU, Yajing ZHAO, Yingdong LI, Pingli LI. Mechanical design and hydraulics simulation of a new complex internal heat integrated distillation column[J]. CIESC Journal, 2020, 71(5): 1995-2003.

刘宏, 赵雅静, 李英栋, 李凭力. 新型复合式内部能量集成的精馏塔的机械设计与水力学模拟[J]. 化工学报, 2020, 71(5): 1995-2003.

Figures/Tables 19

References 33

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塔板数	提馏段质量分数		精馏段质量分数		传热系数/ (W/(m²·K))	换热管面积/m²	降液板面积/m²	总传热面积/m²
塔板数	苯	甲苯	苯	甲苯	传热系数/ (W/(m²·K))	换热管面积/m²	降液板面积/m²	总传热面积/m²
1	0.4853	0.5146	0.9944	0.0055	850	1.46952	0.001287	1.470807
2	0.3568	0.6431	0.9871	0.0128	850	1.46952	0.001287	1.470807
3	0.2383	0.7616	0.9821	0.0178	850	1.2246	0.001287	1.225887
4	0.1478	0.8521	0.9729	0.0270	850	1.2246	0.001287	1.225887
5	0.0876	0.9123	0.9574	0.0425	850	1.30624	0.001716	1.307956
6	0.0509	0.9490	0.9318	0.0681	850	0.97968	0.001716	0.981396
7	0.0294	0.9705	0.8907	0.1092	850	0.849056	0.001716	0.850772
8	0.0170	0.9829	0.8280	0.1719	850	1.06132	0.002145	1.063465
9	0.0098	0.9901	0.7401	0.2598	850	0.8164	0.002145	0.818545
10	0.0054	0.9945	0.6314	0.3685	850	0.6123	0.002145	0.614445

塔板数	提馏段质量分数		精馏段质量分数		传热系数/ (W/(m²·K))	换热管面积/m²	降液板面积/m²	总传热面积/m²
塔板数	苯	甲苯	苯	甲苯	传热系数/ (W/(m²·K))	换热管面积/m²	降液板面积/m²	总传热面积/m²
1	0.4853	0.5146	0.9944	0.0055	850	1.46952	0.001287	1.470807
2	0.3568	0.6431	0.9871	0.0128	850	1.46952	0.001287	1.470807
3	0.2383	0.7616	0.9821	0.0178	850	1.2246	0.001287	1.225887
4	0.1478	0.8521	0.9729	0.0270	850	1.2246	0.001287	1.225887
5	0.0876	0.9123	0.9574	0.0425	850	1.30624	0.001716	1.307956
6	0.0509	0.9490	0.9318	0.0681	850	0.97968	0.001716	0.981396
7	0.0294	0.9705	0.8907	0.1092	850	0.849056	0.001716	0.850772
8	0.0170	0.9829	0.8280	0.1719	850	1.06132	0.002145	1.063465
9	0.0098	0.9901	0.7401	0.2598	850	0.8164	0.002145	0.818545
10	0.0054	0.9945	0.6314	0.3685	850	0.6123	0.002145	0.614445

理论板	精馏段开孔数	提馏段开孔数	塔径/mm	提馏段筛孔直径/mm	精馏段筛孔直径/mm	精馏段堰高 /mm	提馏段堰高/mm	内部列管壁厚/mm	精馏段塔板液泛率	提馏段塔板液泛率
1	32	120	250	6	4	25	20	2	0.7	0.58
2	35	120	250	6	4	25	20	2	0.68	0.55
3	50	100	250	6	4	25	20	2	0.65	0.53
4	60	100	250	6	4	25	20	2	0.64	0.53
5	80	80	250	8	4	25	20	2	0.64	0.54
6	80	60	250	8	4	25	20	2	0.62	0.54
7	100	52	250	8	4	25	20	2	0.65	0.55
8	100	52	250	10	5	25	20	2	0.63	0.58
9	122	40	250	10	5	25	20	2	0.62	0.56
10	122	30	250	10	5	25	20	2	0.64	0.57

理论板	精馏段开孔数	提馏段开孔数	塔径/mm	提馏段筛孔直径/mm	精馏段筛孔直径/mm	精馏段堰高 /mm	提馏段堰高/mm	内部列管壁厚/mm	精馏段塔板液泛率	提馏段塔板液泛率
1	32	120	250	6	4	25	20	2	0.7	0.58
2	35	120	250	6	4	25	20	2	0.68	0.55
3	50	100	250	6	4	25	20	2	0.65	0.53
4	60	100	250	6	4	25	20	2	0.64	0.53
5	80	80	250	8	4	25	20	2	0.64	0.54
6	80	60	250	8	4	25	20	2	0.62	0.54
7	100	52	250	8	4	25	20	2	0.65	0.55
8	100	52	250	10	5	25	20	2	0.63	0.58
9	122	40	250	10	5	25	20	2	0.62	0.56
10	122	30	250	10	5	25	20	2	0.64	0.57

参数	精馏段	提馏段
降液管长/mm	214	620
出口堰高/mm	25	20
塔径/mm	250	250
筛孔直径/mm	5	10