Thermal Treatment Of Halogenated Inorganic Aqueous Waste With Energy And By-Product Recovery
This paper describes the incineration technology used to safely destroy the liquid and gaseous wastes containing inorganic salts generated by Bulk Pharmaceutical and agrochemical industries. The plants are supplied with dedicated downstream Air Pollution Control System (APC) or energy recovery where applicable. Due to the emergence of new products and increased production in Pharmaceutical and Bulk Chemical industries over recent years, the generation of complex cocktails of halogenated inorganic aqueous wastes from these processes has expanded rapidly. In many of the larger facilities, this has resulted in a corresponding increase in toxic gaseous and liquid waste materials. In majority of applications, as a last resort, incineration is the only method for the safe treatment and disposal of these hazardous wastes. Incineration can be costly, both in its initial investment and later in operation, being affected in turn by waste characteristics such as heating value and chemical makeup. These costs can be offset by incorporating energy and by-product recovery systems into the overall plant design. The operating cost for these plants can be minimised by proper design of the combustion system and with the selection of the best available technology for the downstream energy and by-product recovery processes. The recovery unit forms an integral part of the APC System. This paper will review a case study based on a custom designed plant supplied for the treatment of halogenated inorganic aqueous waste using reactor chemistry with energy and by-product recovery.