Abstract

The asymmetric phenomenon of flame deflection in the combustion process of coal-fired boiler for different flow pattern, deflection angle and primary temperature were presented in this work. Numerical simulation was used for this paper to analyze the flow and heat transfer of the boiler furnace combustion. Air flow and combustion condition for the furnace firstly was simulated. And the nonlinear characteristics were loaded to analysis the furnace combustion. Thermal deviation which is the critical parameter for boiler was studied for the range of deflection angle from 0° to 18°, and the inlet primary temperature added + 0 K(BMCR), + 5 K, + 10 K, + 15 K by carrying out the numerical calculation. So the improvement methods for the thermal deviation are studied in the paper.

摘要

提出了燃煤锅炉燃烧过程中不同流型，偏转角和一次温度的火焰偏转不对称现象。本文通过数值模拟来分析锅炉炉膛燃烧的流动和传热。首先模拟了炉子的气流和燃烧条件。并加载了非线性特性以分析炉膛燃烧。对于偏转角从0°到18°的范围，研究了作为锅炉关键参数的热偏差，并通过携带增加了入口主温度+ 0 K（BMCR），+ 5 K，+ 10 K，+ 15 K进行数值计算。因此，本文研究了改善热偏差的方法。