小型卧式燃煤热风炉内流动与传热过程的数值模拟及实验

Numerical simulation and experimental of flow and heat transfer process in a small horizontal coal-fired hot blast stove

中文关键词: 燃煤热风炉  数值模拟  第三挡板  颗粒物排放

英文关键词: coal fired hot blast stove  numerical simulation  htird baffle  particulate emissions

中文摘要:

      为了研究第三挡板长度对热风炉燃烧性能的影响,以热风炉燃烧室为研究对象,利用FLUENT软件对其进行了数值模拟,模拟分析了燃烧室内的温度分布、速度分布及颗粒物浓度分布等情况,最后搭建了试验台对数值模型进行了验证。结果表明：燃烧室温度模拟值与实验值的相对误差在10%以内；燃烧高温区位于第一挡板和第二挡板顶部之间的区域；大部分颗粒物集中在炉排底部附近,随着烟气绕挡板流动,颗粒物浓度逐渐降低；热风炉燃烧室内第三挡板长度为270mm时,可以减少炉膛出口处颗粒物的排放,使燃烧更充分。

英文摘要:

      In order to study the influence of the third baffle length on the combustion performance of hot blast stove. The combustion chamber of hot blast stoves was taken as the research object, and Fluent software was used to simulate the combustion chamber of hot blast stove, The temperature distribution, velocity distribution and particle concentration distribution in the combustion chamber were simulated and analyzed, and then the experimental value was compared with the theoretical model.The results show that: the relative error between the simulated value and the experimental value of combustion chamber temperature is within 10% ;the combustion high temperature zone is located between the bottom of the grate and the top of the second baffle plate. Most of the particles are concentrated at the bottom of the grate,with the flow of air around the baffle, the concentration of particles decreased gradually. When the length of the third baffle in the combustion chamber of the hot blast stoves is 270mm, the emission of particles at the outlet of the furnace is reduced and the combustion efficiency is improved.