Cement Energy and Environment

• ' . Processing of Liquid Hazardous Waste in Cement Kiln V.S. Narang & M.M. Patil My Home Industries Private Ltd. 1.01 MY HOME INDUSTRIES PRIVATE LTD has initiated promoting the use of Alternative fuels as part of drive for sustainable development and resource conservation. Earlier practice of disposal of liquid waste was firing in incinerators. MHIPL explored the possibility of installation of a fool proof system for safe handling and usage of these hazardous wastes. MH IPL is a joint venture company with CRH pic an Irish company which is a leading building materials 1.02 Using organic residue in cement kiln as alternate fuel has many environment benefits such as:- - High temperature (Flame temp. of 2000Deg C and material temp. up to 1400 Dec) and residence time of 4-5 seconds in an oxygen rich atmosphere ensures the destruction of organic compound found in any waste. company in Asia, Europe and America. CRH has rich experience in usage of AF (liquid and solid) at its European plants. FLS was contacted for supply a suitable system. MHIPL installed and commissioned alternative fuel handling and firing system in April'2012 with an Capital expenditure of about Rs 12 crores and started utilizing liquid organic hazardous waste generated From pharmaceutical industries as alternative fuel in cement kilns . - Any acid gases formed during combustion are neutralized by the raw material being of an alkaline nature and are incorporated into the cement clinker. - Interaction of the flue gases and the raw material present in the kiln ensures that the non-combustible part of the residue is held back in the process and 19