余热锅炉入口管箱底面沉积特性  

Sedimentation characteristics of the bottom surface of the inlet pipe box of a waste heat boiler

作　　者：赵浩然 黄嗣罗 林梅[1] ZHAO Haoran;HUANG Siluo;LIN Mei(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China;Maoming Gravity Petrochemical Equipment Co.,Ltd.,Maoming 525024,Guangdong,China)

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]茂名重力石化装备股份公司,广东茂名525024

出　　处：《化工学报》2024年第10期3464-3476,共13页CIESC Journal

摘　　要：采用计算流体力学软件,基于Euler-Lagrange方法,对一种余热锅炉入口管箱底面沉积特性进行数值模拟,详细研究了质量流量(0.002~0.010 kg·s^(-1))、入口速度(1.5~3.5 m·s^(-1))以及颗粒直径(20~60μm)对底面沉积特性的影响规律。模拟的气固两相速度与实验数据吻合较好,验证了模型的适用性。模拟结果表明:(1)当颗粒直径不变时,为了改善底面沉积情况,应当尽量减小入口速度和颗粒质量流量;(2)当颗粒质量流量不变时,若颗粒直径小于40μm,较小的入口速度能够较好地改善底面沉积情况;若颗粒直径大于40μm,增大入口速度能够显著改善底面沉积情况;若颗粒直径为40μm,入口速度的变化几乎不能改变底面沉积速率;(3)当入口速度不变时,为了改善底面沉积情况,应当尽量减小颗粒直径和颗粒质量流量。Using computational fluid dynamics software and based on the Euler-Lagrange method,numerical simulations were conducted on the deposition characteristics of the bottom surface of an inlet pipe box of a waste heat boiler.The effects of different mass flow rates(0.002—0.010 kg·s^(-1)),inlet velocities(1.5—3.5 m·s^(-1)),and particle diameters(20—60μm)on the deposition characteristics of the bottom surface are studied in detail.The simulated gas-solid two-phase velocity matches well with experimental data,verifying the applicability of the model.The simulation results show that:(1)When the particle diameter remains unchanged,in order to improve the bottom surface deposition,the inlet velocity and particle mass flow rate should be reduced as much as possible.(2)When the particle mass flow rate remains constant,if the particle diameter is less than 40μm,a smaller inlet velocity can effectively improve the bottom deposition situation;If the particle diameter is greater than 40μm,increasing the inlet velocity can significantly improve the bottom deposition situation;If the particle diameter is 40μm,the change in inlet velocity can hardly change the bottom deposition rate.(3)When the inlet velocity remains constant,in order to improve the bottom deposition situation,the particle diameter and particle mass flow rate should be minimized as much as possible.

关 键 词：气固两相流 沉积 数值模拟 余热锅炉 计算流体力学 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]