基于双喷口喷动单元的喷动床放大研究

doi:10.11949/0438-1157.20250468

化工学报 ›› 2025, Vol. 76 ›› Issue (11): 5664-5676.DOI: 10.11949/0438-1157.20250468

• 专栏：能源利用过程中的多相流与传热 • 上一篇

基于双喷口喷动单元的喷动床放大研究

岳远贺¹^,²(), 赵微微¹^,², 侯林杰¹^,², 张勇³(), 饶中浩¹^,²()

^1.河北工业大学能源与环境工程学院，先进储能技术与装备河北省工程研究中心，天津 300401
^2.河北工业大学能源与环境工程学院，河北省热科学与能源清洁利用技术重点实验室，天津 300401
^3.中国科学院过程工程研究所介科学与工程全国重点实验室，北京 100190

收稿日期:2025-04-30 修回日期:2025-06-09 出版日期:2025-11-25 发布日期:2025-12-19
通讯作者: 张勇,饶中浩
作者简介:岳远贺（1991—），男，博士，副教授，yuanhe.yue@hebut.edu.cn
基金资助:
国家重点研发计划项目(2022YFB3806503);河北省自然科学基金项目(E2023202248)

Study on the scaling-up of spouted fluidized beds based on the dual-nozzle spouting unit

Yuanhe YUE¹^,²(), Weiwei ZHAO¹^,², Linjie HOU¹^,², Yong ZHANG³(), Zhonghao RAO¹^,²()

^1.Hebei Engineering Research Center of Advanced Energy Storage Technology and Equipment, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
^2.Hebei Key Laboratory of Thermal Science and Energy Clean Utilization, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
^3.State Key Laboratory of Mesoscience and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

Received:2025-04-30 Revised:2025-06-09 Online:2025-11-25 Published:2025-12-19
Contact: Yong ZHANG, Zhonghao RAO

摘要/Abstract

摘要：

喷动床凭借其能在反应器尺度上实现颗粒稳定循环的特点，被广泛应用在储能颗粒制备等领域。然而，颗粒的循环运动会受到操作条件、容器尺寸等条件的影响，导致床层放大困难。研究思路在于摒弃垂直独立喷动的理念，将双喷口协同作用作为基本单元并开展喷动床放大设计。研究表明，在二维和三维矩形喷动床中，双喷口协同偏转喷动具备更高的气固混合效率与更宽的操作区间。二维喷动床内气固混合20 s后，双喷口比单喷口的温度下降同比提升了12%，且颗粒温度方差降低，展现出更强的均匀性。当双喷口流化床纵向扩展为四喷口时，极易出现腾涌状态。通过适度降低气体速度至1.75~2.0 m/s，四喷口喷动床可以实现多喷口独立垂直喷动，并具有优良的气固混合效果。本研究深入揭示了双喷口协同喷动单元在喷动床放大过程中的重要价值，为矩形喷动床的放大设计开辟了新路径。

关键词: 喷动床, 放大, CFD-DEM, 倾斜喷动, 多相流

Abstract:

The spouted fluidized bed has been widely applied in the fields such as the preparation of energy storage particles due to its ability to achieve stable particle circulation at the scale of the reactor. However, the circulation of particles is affected by operating conditions, container size and other conditions, which makes it difficult to scale up the bed. The idea of this paper is to abandon the concept of vertical independent spouting, and instead the use of the coordinated spouting dual nozzles as the basic unit to scale-up the bed. The research shows that in two-dimensional and three-dimensional rectangular spouted bed, the coordinated deflected spouting of dual nozzles has a higher gas-solid mixing efficiency and a wider operating range. After 20 seconds of gas-solid mixing in the two-dimensional spouted bed, the temperature drop of the dual nozzle compared with the single nozzle increased by 12%, and the variance of particle temperature decreased, demonstrating stronger uniformity. When the dual nozzle bed is longitudinally expanded to four nozzles, a slugging fluidized state is very likely to occur. By moderately reducing the gas velocity to 1.75—2.00 m/s, the four-nozzle spouted bed can achieve independent vertical jet movement of multiple nozzles and has an excellent gas-solid mixing effect. This study deeply reveals the important value of the coordinated spouting unit of dual nozzles in the scaling-up of the spouted bed, and opens up a new path for the scaling-up design of rectangular spouted beds.

Key words: spouted bed, scale-up, CFD-DEM, deflected spouting, multiphase flow

中图分类号:

TK 02

岳远贺, 赵微微, 侯林杰, 张勇, 饶中浩. 基于双喷口喷动单元的喷动床放大研究[J]. 化工学报, 2025, 76(11): 5664-5676.

Yuanhe YUE, Weiwei ZHAO, Linjie HOU, Yong ZHANG, Zhonghao RAO. Study on the scaling-up of spouted fluidized beds based on the dual-nozzle spouting unit[J]. CIESC Journal, 2025, 76(11): 5664-5676.

图/表 16

图1 各情况底部喷口示意图

Fig.1 Schematic diagram of the bottom spouts for each situation case

表1 主要模拟参数

Table 1 The main simulation parameters

参数	数值
固相
颗粒直径	2.5 mm
颗粒密度	2526 kg/m³
固相温度	363.15 K
恢复系数(p-p)	0.97
恢复系数(p-w)	0.97
颗粒床层高度	0.12 m
气相
气体密度	1.2 kg/m³
气体动力黏度	1.8 Pa·s
流体温度	293.15 K
压力	101325 Pa

图2 高度为0.25 m时平均粒子垂直速度与实验数据的对比

Fig.2 Comparison of the average vertical velocity of particles and experimental data when the height level is 0.25 m

图3 模拟与实验的平均颗粒温度对比

Fig.3 The comparison of the average particle temperature between the simulation results and the experimental data

图4 不同喷口间距下不同Usp的孔隙度分布情况

Fig.4 Snapshots of void distribution of different Usp under different distance conditions

图5 不同喷口间距下不同Ubg的孔隙度分布情况

Fig.5 Snapshots of void distribution of different Ubg under different distance conditions,

图6 单喷口和双喷口下平均颗粒温度和方差随时间变化曲线

Fig.6 Time-evolution profiles of mean particle temperature and variance under single spouting and two-joint spouting

图7 二维喷动床内以温度着色的粒子运动快照

Fig.7 Snapshots of the movement of temperature-colored particles in a two-dimensional spouted bed

图8 喷口与床体不同厚度比情况下的孔隙度分布

Fig.8 Snapshots of void distribution under different thickness ratios of the spout to the spouted bed

图9 颗粒平均温度随厚度比及背景气流速度的变化

Fig.9 The variation of the average particle temperature with the thickness ratio and the background velocity

图10 不同背景气流速度下颗粒温度和方差随时间变化曲线

Fig.10 Time-evolution profiles of mean particle temperature and variance under different background velocities

图11 三维多喷口条件下各喷口孔隙度分布情况

Fig.11 Snapshots of void distribution of each spout under three-dimensional multi-spout conditions

图12 三维多喷口条件下各喷口颗粒运动流动状态

Fig.12 The particle movement flow state of each spout under three-dimensional multi-spout conditions

图13 三维多喷口的颗粒温度及方差随时间的演变曲线

Fig.13 The evolution curves of particle temperature and variance over time of three-dimensional multiple spouts

图14 三维多喷口的混合指数随时间的演变曲线

Fig.14 The evolution curves of the mixing index of three-dimensional multiple spouts over time

图15 三维喷动床内以温度着色的粒子运动快照

Fig.15 Snapshots of the movement of temperature-colored particles in a three-dimensional spouted bed

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基于双喷口喷动单元的喷动床放大研究

Study on the scaling-up of spouted fluidized beds based on the dual-nozzle spouting unit

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