多种废弃物的共气化数值模拟评价  

Numerical simulation evaluation of co-gasification of various wastes

作　　者：齐宏伟[1] 俞淼淼 QI Hongwei;YU Miaomiao(Sinopec North China Oil and Gas Company,Zhengzhou Henan 450000,China;Machinery Industry Shanghai Lanya Petrochemical Equipment Inspection Institute Co.,Ltd.,Shanghai 201600,China)

机构地区：[1]中国石化华北油气分公司,河南郑州450000 [2]机械工业上海蓝亚石化设备检测所有限公司,上海201600

出　　处：《石油化工应用》2024年第3期102-108,共7页Petrochemical Industry Application

基　　金：中国石化华北油气分公司科研项目“东胜气田钻采工艺关键技术研究”(KJGLB-2022-13)。

摘　　要：气化技术被认为是一种将废弃物转化成清洁能源的绿色技术,因为它不仅能生产合成气,还不会对环境造成严重的影响,同时残留物还可以用于其他工业生产。了解不同种类的废弃物与木屑混合后的共气化效率对进一步研究气化有着重要的意义。本次研究提出了6种不同的废弃物与木屑混合后的共气化方案。然后以固定床下吸式气化炉的气化过程为例,通过建立数值模型来模拟气化过程中四个不同阶段(干燥、热解、燃烧以及还原)的反应与演化过程,并预测合成气的组分、合成气热值和冷气效率。通过对比模拟结果,得出结论:对于C、H元素含量较低的废弃物,其含量的增加会导致气化效率降低;对于不同种类的废弃物,C、H元素含量越高,共气化产生的合成气热值也就越高,例如鸡粪的C、H元素含量最低,对应合成气热值也是最低的,为3.41 MJ/m^(3)。食物残渣1的C、H元素含量最高,对应合成气热值也是最高的,为3.92 MJ/m^(3)。Gasification technology is considered as a green technology to turn waste into clean energy,because it can not only produce syngas,but also has no serious impact on the environment,and the residue can also be used for other industrial production.Understanding the co-gasification efficiency of different types of wastes mixed with wood chips is of great significance for further research on gasification.In this study,six different gasification schemes for mixed wastes and sawdust are proposed.Then,taking the gasification process of fixed-bed under-suction gasifier as an example,a numerical model was established to simulate the reaction and evolution process of four different stages(drying,pyrolysis,combustion and reduction)in the gasification process,and to predict the composition of syngas,heat value of syngas and cooling efficiency.By comparing the simulation results,it is concluded that the increase of the content of waste with low C and H elements will lead to the reduction of gasification efficiency.For different types of wastes,the higher the content of elements C and H,the higher the calorific value of syngas generated by co-gasification.For example,the lowest content of elements C and H in chicken manure also corresponds to the lowest calorific value of syngas,which is 3.41 MJ/m^(3).The content of C and H elements in food residue 1 is the highest,and the corresponding calorific value of syngas is also the highest,3.92 MJ/m^(3).

关 键 词：共气化 废弃物 气化效率 合成气热值 

分 类 号：TE683[石油与天然气工程—油气加工工程]