摇摆对气液并流模式立体旋流筛板压降的影响研究

doi:10.11949/0438-1157.20221393

化工学报 ›› 2023, Vol. 74 ›› Issue (2): 707-720.DOI: 10.11949/0438-1157.20221393

摇摆对气液并流模式立体旋流筛板压降的影响研究

白剑钊¹(), 郭子轩¹, 王德武¹^,², 刘燕¹, 王若瑾¹, 唐猛³(), 张少峰¹^,²()

^1.河北工业大学化工学院，天津 300130
^2.化工节能过程集成与资源利用国家地方联合实验室，天津 300130
^3.河北工业大学机械工程学院，天津 300130

收稿日期:2022-10-21 修回日期:2022-12-29 出版日期:2023-02-05 发布日期:2023-03-21
通讯作者: 唐猛,张少峰
作者简介:白剑钊（1996—），男，硕士研究生，852521522@qq.com
基金资助:
国家自然科学基金项目(21776055);河北省自然科学基金项目(B2021202002);中国博士后科学基金项目(2020M670614)

Effect of roll on pressure drop in concurrent gas-liquid columns with tridimensional rotational flow sieve tray

Jianzhao BAI¹(), Zixuan GUO¹, Dewu WANG¹^,², Yan LIU¹, Ruojin WANG¹, Meng TANG³(), Shaofeng ZHANG¹^,²()

^1.School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China
^2.National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, Hebei University of Technology, Tianjin 300130, China
^3.School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China

Received:2022-10-21 Revised:2022-12-29 Online:2023-02-05 Published:2023-03-21
Contact: Meng TANG, Shaofeng ZHANG

摘要/Abstract

摘要：

以空气-水为实验介质，在喷淋密度78~182 m³·(m²·h)^-1、气相动能因子1.19~2.77 m·s^-1·(kg·m^-3)^0.5、摇摆幅值Θ=5°~15°、周期T=8~20 s的条件下，测定了气液并流模式下立体旋流筛板（TRST）的压降，考察了气液通量、塔板数量、位置和方式对压降的影响，并与直立和倾斜工况对比。结果表明：增加倾斜及摇摆角度干板压降略微下降；摇摆时的湿板压降介于直立和倾斜之间，受摇摆角度影响较大，基本不受周期影响；增大气量有利于抵抗倾斜及摇摆的影响，而增大液量会使倾斜及摇摆的影响作用加剧。整体上，塔板顺、逆向安装时的湿板压降分别在100 Pa和170 Pa以内，而逆向安装的变化率约为顺向的2倍，这是由于逆向安装下改变了气液流动方向，增大了能量损失。建立了气液并流摇摆工况下TRST的湿压降预测模型，相对误差在15%以内。

关键词: 塔器, 立体旋流筛板, 气液两相流, 摇摆工况, 压降

Abstract:

With air-water as the experimental medium, the pressure drop of tridimensional rotational flow sieve tray (TRST) under gas-liquid co-flow mode was measured, under the range of different sprinkle density 78—182 m³·(m²·h)^-1, gas phase loading factor 1.19—2.77 m·s^-1·(kg·m^-3)^0.5, the rolling amplitudes Θ=5°—15°, and the rolling periods T=8—20 s. The effects of gas-liquid flux, the number, position and mode of tray installation on pressure drop were investigated and compared with the vertical and tilt conditions. It turns out that, the dry plate pressure drop is less than 35 Pa for forward installation and less than 80 Pa for backward installation. And the dry plate pressure drop is not affected by incline and rolling, but decreases slightly with the increase of incline and rolling amplitude when the gas volume is large. The wet plate pressure drop during rocking is between upright and inclined, and is greatly affected by the rocking angle, and is basically not affected by the cycle. Increasing the gas volume is beneficial to resist the influence of incline and rolling, while increasing the liquid volume will aggravate the influence of incline and rolling. On the whole, the wet pressure drop during the forward and backward installation of the tray is within 90 Pa and 170 Pa respectively, while the change rate of pressure drops during the backward installation is about twice of the forward installation. This is because the gas-liquid flow direction is changed under the backward installation and the energy loss is increased. The pressure drop and the pressure drop change rate of the second and third trays were similar. The prediction models of dry pressure drop and wet pressure drop of TRST under the rolling condition of gas-liquid co-current flow mode were established, and errors are within 10% and 15% respectively.

Key words: column, tridimensional rotational flow sieve tray, gas-liquid flow, rolling condition, pressure drop

中图分类号:

TQ 027.1

白剑钊, 郭子轩, 王德武, 刘燕, 王若瑾, 唐猛, 张少峰. 摇摆对气液并流模式立体旋流筛板压降的影响研究[J]. 化工学报, 2023, 74(2): 707-720.

Jianzhao BAI, Zixuan GUO, Dewu WANG, Yan LIU, Ruojin WANG, Meng TANG, Shaofeng ZHANG. Effect of roll on pressure drop in concurrent gas-liquid columns with tridimensional rotational flow sieve tray[J]. CIESC Journal, 2023, 74(2): 707-720.

图/表 15

图1 实验装置及流程图

Fig.1 Experimental equipment and flow chart

图2 立体旋流筛板结构示意图

Fig.2 Schematic diagram of three-dimensional cyclone sieve plate structure

表1 TRST几何结构参数

Table 1 Geometric parameters of TRST structure

参数	数值
塔板高度h/mm	25
外筒直径/mm	69
内筒直径/mm	13
扭转角β/（°）	90
筛板厚度/mm	1.5
筛孔个数	45
筛孔直径/mm	2.5

图3 摇摆塔瞬时摆角变化和瞬时角速度的变化

Fig.3 Rolling mode and the variation of both the instantaneous rolling angle and angular velocity during the rolling of the column

图4 不同Fs、塔板安装位置及安装方式下的干板压降

Fig.4 Dry plate pressure drop under different tray installation positions and modes of Fs

图5 不同倾斜角度、摇摆角度及周期对干板压降的影响

Fig.5 Influence of different inclined amplitude, rolling amplitude and period on pressure drop of dry plate

图6 不同塔板安装位置及方式下湿板压降

Fig.6 Wet plate pressure drop under different tray installation positions and modes

图7 倾斜时不同塔板安装位置及方式下湿板压降变化率

Fig.7 Wet plate pressure drop variation rate under different tray installation positions and modes under inclined conditions

图8 摇摆时不同塔板安装位置及方式下湿板压降变化率

Fig.8 Wet plate pressure drop variation rate under different tray installation positions and modes under rolling conditions

图9 倾斜及摇摆对不同Fs、Lw下湿板压降的影响

Fig.9 Influence of inclined and roll on wet plate pressure drop under different Fs and Lw

图10 湿板压降随倾斜角度的变化

Fig.10 Wet plate pressure drop changed with inclined amplitude

图11 湿板压降随摇摆角度的变化

Fig.11 Wet plate pressure drop changed with rolling amplitude

图12 湿板压降随摇摆周期的变化

Fig.12 Wet plate pressure drop changes with rolling period

图13 干板压降实验值和计算值的对比

Fig.13 Comparison of experimental and calculated dry plate pressure drop values

图14 湿板压降实验值和计算值的对比

Fig.14 Comparison of experimental and calculated wet plate pressure drop values

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摇摆对气液并流模式立体旋流筛板压降的影响研究

Effect of roll on pressure drop in concurrent gas-liquid columns with tridimensional rotational flow sieve tray

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