Public concerns about waste incineration plants are mainly concerns about waste odours and emissions of pollutants such as dioxins during incineration. In the interview, the reporter learned that since the end of the last century, many countries have improved the technology and hardware for gas purification in the incineration process. At present, in terms of technology, the emission of pollutants such as dioxin from incineration is completely controllable, and the problem of odor is also greatly improved.
In order to avoid dioxin generation during incineration, the incinerator achieves complete combustion of the garbage through a high temperature of 850 to 950 degrees Celsius. The dust in the incineration process is adsorbed by an electric dust collector, and the exhaust gas is washed by a washing device. The dioxin is adsorbed by activated carbon, and then treated by a filter dust collecting device and the like, and can be discharged after meeting safety standards. The ash produced after the incineration of combustible waste is only one-twentieth of the original volume, and the collected dust containing dioxin and other pollutants is harmlessly treated with the drug and transported to Osaka Bay for landfill together with the ash.
In chemical engineering, the filler refers to an inert solid material contained in a packed column, such as a Pall Ring packing, a Polyhedral Hollow Ball packing, etc., which functions to increase the gas-liquid contact surface and strongly mix them with each other. Pall ring and multi-faceted hollow ball filler have the advantages of large production capacity, high separation efficiency, small pressure drop, small liquid holding capacity and large operational flexibility. The Pall ring and the multi-faceted hollow ball filler are used as fillers in the packed tower, and the filler is placed on the support plate in a random pile or in a whole manner. Install a packing platen above the packing to prevent it from being blown by the updraft. The liquid is sprayed from the top of the column through the liquid distributor onto the packing and flows down the surface of the packing. The gas is fed from the bottom of the tower, distributed through the gas distribution device, and continuously flows through the gap of the packing layer in a countercurrent flow with the liquid. On the surface of the packing, the gas-liquid two phases are in close contact with each other for mass transfer. The packed tower belongs to a continuous contact gas-liquid mass transfer device, and the two-phase composition continuously changes along the tower height. Under normal operating conditions, the gas phase is a continuous phase, and the liquid phase is a dispersed phase.