母玉 路义萍 朱凌波 葛亚军

摘 要：炉膛烟气温度是表征锅炉运行安全性及经济性的重要监测参数之一，对其进行研究具有重要意义。以前墙布置两旋流燃烧器的35t/h工业试验煤粉炉炉膛为研究对象，两燃烧器喷口布置于前墙水冷壁表面，在75%、60%负荷运行下进行实验，测得炉内烟气温度数据，然后，建立了炉膛与燃烧器一体化模型，基于CFD原理，数值模拟耦合求解传热、流动及燃烧等控制方程组，得到不同负荷下的烟气温度分布特点。结果表明，在二次风旋流扩散高度范围内，以燃烧器中心轴线所在高度处为中心，烟气面平均温度分布呈现近似“V”型剧烈升高;数值模拟结果误差在两负荷下分别为9.1%、5.1%。为同类型工业煤粉锅炉炉膛温度测量提供参考数据。

关键词：温度场; 旋流燃烧器结构; 数值模拟; 工业煤粉炉炉膛

DOI：10.15938/j.jhust.2021.03.007

中图分类号： TK09

文献标志码： A

文章编号： 1007-2683（2021）03-0045-06

Study on Temperature Field in a Pulverized Coal-fired

Furnace with Two Swirling Burners on the Front Wall

MU Yu， LU Yi-ping， ZHU Ling-Bo， GE Ya-jiu

（ School of Mechanical & Power Engineering， Harbin University of Science and Technology， Harbin 150080， China）

Abstract：The temperature of flue gas in furnace is one of the important monitoring parameters for boiler security and economical efficiency， and the research into this topic is of great importance. Taking the furnace in a 35t/h industry pulverized coal boiler with two swirl burners on the front wall as an example， the nozzle of two burners were placed on the surface of the water-cooled tube diameter located， and the gas temperature test in the furnace under 75% and 60% loads was performed. Then， the geometry of the CFD model of the furnace and burner combined was established. Based on CFD principle， the numerical simulation of control quitions was conducted and the characteristics of temperature distribution was obtained under above-mentioned operating conditions. The results indicated that the area-weighted average gas temperature rose sharply in form of about “V” type in the cyclone diffusion space of secondary air， and the temperature was lower at the position of the burner center axis located， the maximum relative errors of simulation results were 9.1% and 5.1% respectively. This study provided a reference for the test of the gas temperature in the same type industrial pulverized coal boiler.

Keywords：temperature field; structure of centerfeeding cyclone burner; numerical simulation; industry pulverized coal furnace

0 引 言

燃燒器结构及其配风对工业煤粉炉炉膛中的温度场、温度分布特征、烟气排放特点、锅炉效率或能耗有直接影响，一直是多年来的研究热点问题。近年来，随着节能及环保要求指标不断提高，煤粉工业锅炉，包括链条炉改造成的煤粉炉，作为典型高耗能工业设备，由于其煤粉燃烧技术，特别是旋流燃烧器，对锅炉高效、安全、稳定、低排放运行起决定性作用，越来越受到广泛关注。对于吨位相对小的工业煤粉锅炉不同于电站锅炉，炉膛高度及深度受限[1]，燃烧组织更困难，同时要兼顾非常严格……