The improvement method of oxidation furnace of chemical cleaning liquid waste treatment system

In order to remove the sludge adhered to the steam generator tube, the chemical cleaning with ethylenediaminetetraacetic acid (EDTA) is carried out. After the chemical cleaning, the chemical cleaning liquid waste containing EDTA is treated by the pyrolysis. The pyrolysis process generates air pollution matter such as NOx and SOx when the pyrolysis is firstiy performed at 850°C in the electric furnace. In order to remove air pollution matter, it have burned around 500 to 900°C once again in the oxidation furnace in the downstream of the electric furnace. In this study, we have reviewed a method to prevent damage of the partition wall inside the oxidation furnace due to the high temperature in the chemical cleaning liquid waste pyrolysis treatment process. A function of the secondary combustion at the liquid waste treatment system is a method for reducing harmful gases such as NOx generated by pyrolysis during chemical cleaning liquid waste treatment containing EDTA.