Institute for Thermal Power Engineering, Zhejiang University
Jiaxing Research Institute, Zhejiang University
Institute ofEnergy Engineering, China Jiliang University

针对某 12 t/ d 中试生活垃圾炉排炉,采用数值模拟的方法对工业固废掺烧时炉内全场传热传质情况进行了模拟,对焚烧过程中的速度场、温度场及包括 CO、NOx、SO2在内的污染物浓度场结果进行了分析。 模拟结果表明,无论生活垃圾、工业固废单独焚烧还是两者混合掺烧,炉内速度场分布都相似,床层上部流速较低,整体流线分布均匀;焚烧主燃区都发生在一级炉排上,掺入工业固废使高温区范围扩大且前移,明显提高了炉膛壁面传热系数;掺烧工业固废会使含硫挥发分获得更多与氧发生反应的机会,使其在第一风室内大量生成 SO2,而 NOx的排放浓度变化不大。另外,在实际焚烧炉进行验证的结果表明掺入工业固废后温度有所上升,未完全燃烧的物料在竖井燃烧,尾气中的 SO2浓度略有上升,NOx浓度变化不大,与模拟结果相符。

Numerical simulation was conducted to investigate the heat and mass transfer characteristicsin a 12 t/ d pilot-scale grate-type incinerator for municipal solid waste during the co-incineration of in⁃dustrial solid waste,and the velocity field,temperature field,and the concentration field of pollutants in⁃cluding CO,NOx,and SO2 were analyzed during the incineration process. The results showed that thevelocity field distribution in the incinerator was similar for incinerating municipal solid waste,industrialsolid waste,or a mixture of both,with lower flow velocity in the upper part of the bed and uniform over⁃all flow distribution. The main combustion zone occurred on the first grate,and the addition of industrialsolid waste expanded and shifted the high-temperature area,significantly improving the heat transfercoefficient on the furnace wall. The co-incineration of industrial solid waste provided more opportunitiesfor sulfur-containing volatile compounds to react with oxygen,leading to the generation of a large a⁃mount of SO2 in the primary combustion chamber,while the emission concentration of NOx did notchange much. In addition,the results verified in the actual incinerator showed an increase in tempera⁃ture after mixing industrial solid waste,incomplete combustion of materials in the vertical shaft,a slightincrease in SO2 concentration in the exhaust gas,and little change in NOx concentration,which is con⁃sistent with the simulation results.

国家重点研发计划资助项目(2020YFC1910101);国家自然科学基金创新研究小组(51621005)

蔡鹏涛, 陈彤, 张光学, 等. 垃圾焚烧炉协同焚烧工业固废的数值模拟研究展[J]. 能源环境保护, 2023,37(6): 119-128.

CAI Pengtao, CHEN Tong, ZHANG Guangxue, et al. Numerical simulation study on co-incineration of industrialsolid waste in a municipal solid waste incinerator[J]. Energy Environmental Protection, 2023, 37(6): 119-128.