The water spray system for cement mill is intended to maintain the mill outlet temperature constant at preset values.
During the process of finish grinding of clinker, heat is generated inside the cement mill. The excess heat has to be dissipated so that mill discharge temperature is kept at a desired level (around 90-120°C) to prevent the deterioration of the quality of cement. The increase in temperature beyond 125°C leads to dehydration of gypsum which changes the property of setting of cement. The decrease in temperature below 90°C leads to wet clogging of gypsum and the cement strength is affected.
Cooling inside the Cement Mill is accomplished by introducing water spray and evaporation of injected water at the outlet / inlet the mill. The system ensures precise control of temperature inside mill chamber by regulating the volume of injected water through motorized control valve. When the water injection is disconnected, compressed air purging keeps the injection nozzles clean. The system can be interfaced and operated through existing PLC/DCS or may be provided with a standalone control panel.
Water Spray System comprises of complete set of pumps-motors, isolation valves, control valves, flow meters, pressure measurement and spray nozzles along with other necessary instruments & all relevant accessories, assembled into one compact unit easy to install and operate.