摘要
输灰系统是燃煤发电厂烟气处理的关键环节,其性能直接影响电厂的经济效益和环境效益。该文旨在通过系统分析输灰系统内部复杂的气固两相流动特性,研究提升系统节能降耗水平的流场优化新方法。研究采用现场试验模拟等实验手段,精细测量了输灰系统内部的速度场和浓度场,深入掌握系统内湍流脉动及旋涡运动等一系列典型的流动特征。基于上述研究,构建综合考虑气相速度场与固相颗粒运动的数学模型,采用欧拉-拉格朗日耦合求解方法对方程组进行数值求解,成功实现对输灰系统内部流场的高保真模拟,进而取得显著的节能增效成果,并达到良好的环保效果。该研究为燃煤电厂输灰系统的节能降耗提供新思路和新方法,研究成果具有广阔的工程应用前景。
Ash conveying system is a key link in flue gas treatment in coal-fired power plants,and its performance directly affects the economic and environmental benefits of the power plant.The purpose of this paper is to systematically analyze the complex gas-solid two-phase flow characteristics inside the ash conveying system and study new flow field optimization methods to improve the energy conservation and consumption reduction level of the system.The study used experimental methods such as field test simulation to finely measure the velocity field and concentration field inside the ash conveying system,and deeply grasped a series of typical flow characteristics such as turbulence fluctuations and vortex motion in the system.Based on the above research,we built a mathematical model that comprehensively considered the gas phase velocity field and the movement of solid particles,and used the Euler-Lagrange coupled solution method to numerically solve the equation set,successfully realizing the internal flow field of the ash conveying system.High-fidelity simulation has achieved significant energy-saving and efficiency gains,and achieved good environmental protection effects.This research provides new ideas and methods for energy conservation and consumption reduction in ash conveying systems in coal-fired power plants,and the research results have broad engineering application prospects.
出处
《科技创新与应用》
2025年第30期47-49,54,共4页
Technology Innovation and Application
关键词
燃煤电厂
输灰系统
流场特性
气固两相流
数值模拟
coal-fired power plant
ash conveying system
flow field characteristic
gas-solid two-phase flow
numerical simulation
