Numerical simulation evaluation of co-gasification of various wastes
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 simu-late 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 reduc-tion of gasification efficiency.For different types of wastes,the higher the content of ele-ments C and H,the higher the calorific value of syngas generated by co-gasification.For ex-ample,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/m3.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/m3.
co-gasificationwastegasification efficiencycalorific value of syngas
NETL
NSTL
万方数据
维普
