Water Management in a Steel Plant...

Water Management in a Steel Plant  Water is used in every shop of a steel plant and practically all the functions of water are utilized in the steel plant. Water is used in steel plant for process and heat transfer purposes; whereas water losses in the process are unavoidable (evaporation, drift), there is margin for further improving water use for the sake of the environment, energy efficiency, improvement of operations and for economic reasons. Use of water in a steel plant varied widely and is dependent on the availability of water, technologies employed, age and condition of the plants and equipment, kinds of the processes, and the plant operating procedures. Recycling of water also varies in a wide range in integrated steel plants.  Availability of water is one of the major factors in determining the rate of recycling. Water consumption in steel plant is mainly by evaporation, by spray from cooling towers, or by incorporation into a product. Various terms used in steel industry for water are as follows. Process water – It is the water that comes into contact with an end product or with materials incorporated into an end product. Cooling water – It is the water used exclusively for cooling purpose. Boiler feed water – It is the water introduced into boilers for conversion to steam Sanitary and service water – It is the water used for drinking, showers, general cleaning, and flushing of wastes. Intake water – It is the water which is pumped to the steel plant from water source. Make up water – It is the water added to the water system to compensate for the water losses. Recycle water – It is the water which is reused in a closed loop inside a water system often after...