Discussion on ventilation design of leachate removal areas in MSW incineration power plants

The leachate removal area in MSW (municipal solid waste) incineration power plant is a special workplace, the underground space is full of toxic and harmful gases, and there are combustible gas composition, so it is necessary to set up a general ventilation system to ensure its safe operation. The current standard CJJ 90-2009 does not put forward the requirement of ventilation for the leachate removal area, and there is a lack of unified standards in engineering design, which should be judged by designers personally. Based on the calculation and analysis of measured odor concentration data for two MSW incineration power plants, taking typical odor components as an example, the minimum exhaust air volume (i.e., the theoretical exhaust air volume) of the leachate removal area that conforming to sanitary condition is calculated. It is suggested that the design exhaust air volume of the removal area should be selected according to 12～24 h-1. This paper discusses the design essentials of the ventilation system in leachate removal areas, and puts forward some suggestions for the operation of ventilation system.