| 典型三床RTO设备燃爆危险性数值模拟研究* |
| |
| 引用本文： | 汤振东,郭耸,程洋,贡颢.典型三床RTO设备燃爆危险性数值模拟研究*[J].中国安全生产科学技术,2022,18(8):189-195. |
| |
| 作者姓名： | 汤振东 郭耸 程洋 贡颢 |
| |
| 作者单位： | （南京理工大学 化学与化工学院安全工程系，江苏 南京 210018） |
| |
| 基金项目： | * 基金项目: 国家自然科学基金项目（51974166） |
| |
| 摘 要： | 为研究苯、甲苯、二甲苯混合废气在三床蓄热式废气焚烧炉内部的燃烧过程，基于FLUENT软件建立典型的三床蓄热式废气焚烧炉的物理模型和数值模型，重点分析进气风量和混合可燃气体-空气摩尔占比对其内部压力变化规律的影响，以期可为其安全设计提供借鉴。研究结果表明:燃烧室内的温度变化与燃烧速度变化保持一致，可通过监测RTO燃烧室内的温度来定性评估气体燃烧速度，随着进气风量的增加，混合废气燃烧速度先升高后下降后再升高；从能源损耗和安全生产2个方面综合考虑，得出RTO运行的最佳进气风量为15 000 m3/h到30 000 m3/h，最佳的混合可燃气体-空气摩尔占比为0.15~0.2，这与RTO实际工况相符合，解释RTO装置内废气积聚导致爆炸事故的原因，燃烧过程中压力出现2次峰值超压，实际生产中需在2个时间节点多加防范。
|
| 关 键 词： | 挥发性有机化合物（VOCs） 数值模拟 进气风量 气体摩尔占比 燃烧压力 |
Study on numerical simulation of combustion and explosion hazard in typical three-bed RTO equipment |
| |
| TANG Zhendong,GUO Song,CHENG Yang,GONG Hao.Study on numerical simulation of combustion and explosion hazard in typical three-bed RTO equipment[J].Journal of Safety Science and Technology,2022,18(8):189-195. |
| |
| Authors: | TANG Zhendong GUO Song CHENG Yang GONG Hao |
| |
| Affiliation: | (Department of Safety Engineering,College of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing Jiangsu 210018,China) |
| |
| Abstract: | In order to study the combustion process of benzene,toluene and xylene mixed waste gas in the three-bed regenerative waste gas incinerator,the physical and numerical models of the typical three-bed regenerative waste gas incinerator were established based on FLUENT software.The influence of intake air volume and mixed combustible gas and air molar ratio on its internal pressure variation was focused on to provide reference for its safety design.The results showed that the temperature change in the combustion chamber was consistent with the combustion speed change,and the gas combustion speed could be qualitatively evaluated by monitoring the temperature in the combustion chamber of regenerative thermal oxidizer (RTO).With the increase of intake air volume,the combustion speed of mixed waste gas increased first,then decreased and then increased.Comprehensively considering from two aspects of energy loss and work safety,it was concluded that the optimal intake air volume for RTO operation was 15 000 to 30 000,and the optimal mixed combustible gas and air molar ratio was 0.15~0.2,which were consistent with the actual working conditions and explained the causes of explosion accident caused by the accumulation of waste gas in the RTO device.During the combustion process,the pressure presented two peak overpressure,and more precautions should be taken at two time points in the actual production. |
| |
| Keywords: | volatile organic compounds (VOCs) numerical simulation intake air volume gas molar ratio combustion pressure |
|
| 点击此处可从《中国安全生产科学技术》浏览原始摘要信息 |
|
点击此处可从《中国安全生产科学技术》下载全文 |
