Abstract: More than 300 incinerators in operation from 2016 to 2022 in China were taken as the research object, statistical analysis was made on the variation rules of design and operation parameters such as single-furnace treatment scale, main steam design parameters and incineration load rate. The results indicated that the number of grate furnaces with a single furnace treatment scale of less than 600 t/d accounted for the highest proportion of 63.54%, and the number of large grate furnaces with a single furnace treatment scale of 750 t/d and above had increased significantly in recent years. The proportion of medium temperature and medium pressure (4.0 MPa, 400 ℃) in the steam parameters of waste heat boiler was 59.37%, and the number of incinerators with higher parameters such as 13.5 MPa, 450 ℃ and 13.7 MPa, 485 ℃ had an increasing trend. From 2016 to 2022, the total scale of waste incineration treatment in China had increased from 2.558×105 t/d to 8.047×105 t/d, while the incineration load rate had decreased from 86.60% to 72.78%. The collaborative disposal of industrial organic solid waste by domestic waste incineration power generation facilities was helpful to improve the incineration load rate of incineration plants and could enhance technical and economic benefits.

Key words: waste incineration, grate treatment capacity, steam parameters, incineration load rate, collaborative disposal