Multi-hood local exhaust ventilation method for air pollution sources having emission fluctuation and ventilation Apparatus using the said method

摘要

The present invention relates to a multi-hood local exhaust method applied to the emission fluctuation source and a local exhaust device used therein, and more particularly applicable to the injection process of the casting company, which occurs instantaneously when molten water is injected into the mold Multiple branch pipes in the unit exhaust hood to effectively control the pollutants such as metal fumes and adjust the local exhaust flow according to the pollutant emissions to suit the characteristics of the injection process where the pollutant generation rate is rapidly reduced after the injection is completed. It is installed and controls the opening and closing of each branch pipe according to the pollutant discharge step, characterized in that configured to open and close the branch pipe sequentially for each exhaust hood. The present invention is directed to a plurality of local exhaust devices and each local exhaust device corresponding to each source for the air pollutant generating process in which there are a plurality of the same source and the amount of pollutant generation in each source fluctuates greatly. The present invention relates to a multiple hood local exhaust method applied to a source of emission fluctuation air pollution source and a local exhaust device used therein, by using a plurality of branch pipes connected to each other to obtain maximum local exhaust and pollutant treatment efficiency with a minimum amount of exhaust flow.