竖直管气动物流传输系统管道压降和传送瓶输送特性研究

doi:10.11949/0438-1157.20240373

摘要/Abstract

摘要：

气动物流传输系统在医疗、化工等行业得到广泛应用，管道压降和特征速度是竖直管气动物流传输系统设计的关键参数，但目前相关报道很少。基于实验室自主搭建的竖直管气动物流传输系统，开展压缩气流输送传送瓶实验，进行输送特性分析以及管道压降和特征速度的建模研究。首先借助压降信号分析、高速摄像与数据处理等方法，分析了传送瓶输送特性，提出了基于管道压降信号分析的传送瓶运动状态识别方法；其次综合考虑流道结构特征，建立了竖直管气动物流传输系统的管道压降模型，并通过数据回归获得了管道阻力系数；最后基于力平衡分析、机械能守恒定律建立了竖直管气动物流传输系统特征速度的预测模型，为传送瓶状态识别及追踪监测提供了一种新方法。

关键词: 气动物流传输, 管道压降, 特征速度, 多相流, 气力输送, 流体动力学

Abstract:

Pneumatic logistics transmission system is widely used in medical and chemical industries. Pipe pressure drop and characteristic velocity are key parameters for vertical pipe pneumatic logistics transmission system, but related reports are few. Based on the vertical pipe pneumatic logistics transmission system constructed in the laboratory, experiments of compressed air flow conveying transfer bottle were carried out. Conveying characteristics analysis as well as the modeling of the pipe pressure drop and characteristic velocity of were conducted. Firstly, with the help of pressure drop signal analysis, high-speed camera and data processing, transfer bottle conveying characteristics were analyzed. And a method to identify the transfer bottle motion states was proposed based on the analysis of the pipe pressure drop signal. Then considering the flow channel structural characteristic, pipe pressure drop models of the vertical pipe pneumatic logistics transmission system were established, and the pipe resistance coefficient was obtained by data regression. Finally, on the basis of force balance analysis and conservation of mechanical energy, characteristic velocity prediction models were established, which provide a new method for the transfer bottle status identification and tracking monitoring.

Key words: pneumatic logistics transmission, pipe pressure drop, characteristic velocity, multiphase flow, pneumatic conveying, hydrodynamics

中图分类号:

TQ 022

吴邦汉, 林定标, 陆海峰, 郭晓镭, 刘海峰. 竖直管气动物流传输系统管道压降和传送瓶输送特性研究[J]. 化工学报, DOI: 10.11949/0438-1157.20240373.

Banghan WU, Dingbiao LIN, Haifeng LU, Xiaolei GUO, Haifeng LIU. Study on pipe pressure drop and transfer bottle conveying characteristics in vertical pipe pneumatic logistics transmission system[J]. CIESC Journal, DOI: 10.11949/0438-1157.20240373.

图/表 9

图1 气动物流传输系统实验图

Fig.1 Experimental diagram for pneumatic logistics transmission system

表1 实验工况

Table 1 Experimental conditions

传送瓶种类	U_g/(m/s)	ΔP/Pa	h/m	U_s/(m/s)	传送瓶状态
a	[0.04, 0.18]	[90.34, 492.63]	0	0	静止
a	(0.18 1.21)	[437.63, 529.89]	[0.015, 0.06]	0	悬浮
a	[1.21, 1.82]	[320.18, 522.07]	1.5	[0.50, 1.68]	运动
b	[0.11, 0.58]	[142.18, 783.81]	0	0	静止
b	(0.58, 2.40)	[669.79, 745.62]	[0.005, 0.066]	0	悬浮
b	[2.40, 2.68]	[301.23, 502.37]	1.5	[0.46, 1.20]	运动

图2 管道压降的时间序列曲线

Fig.2 Time series curve for pipe pressure drop

图3 管道压降与表观气速的关系

Fig.3 Relationship between pipe pressure drop and apparent gas velocity

图4 运动区管道阻力系数

Fig.4 Pipe resistance coefficients in motion zone

图5 管道压降的预测值与实验值注:(实心点表示传送瓶a,空心点表示传送瓶b)

Fig.5 Predicted and experimental values of pipe pressure drop

表2 管道压降建模结果

Table 2 Pipe pressure drop modeling results

传送瓶种类	管道压降模型	适用分区	管道特征阻力系数	拟合相关系数R²	预测平均相对误差/%
a b	式(1)	静止区	k=2793.49 k=1435.10	0.99 0.99	9.36 5.26
a b	式(2)	悬浮区	/	/	11.48 6.25
a b	式(3)	悬浮区	/	/	8.48 13.99
a b	式(4)	运动区	ε₃=2.06×10⁴Re^-2；228≤Re≤1171 ε₃=2.50×10⁹Re^-3.43；2152≤Re≤3156	0.99 0.96	5.77 1.80

图6 悬浮区传送瓶状态示意图

Fig.6 Schematic diagram of transfer bottle state in suspension zone

图7 特征速度的实验值与预测值

Fig.7 Experimental and predicted values of characteristic velocity

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