Cement, Energy and Environment

thus reduced exhaust gas temperatures and also to reduce the pressure drop across the cyclones. Further, the same can be installed for marginal clinker produc on increase subject to suitability of upstream and downstream equipment. The bo om stage Preheater cyclones are designed with 270 deg inlet spiral with op mum heat transfer and dip tube (immersion pipe) design is a combina on of high dust collec on efficiency and op mum pressure drop. As part of con nuous improvement of design based on industry feedback and opera onal results, the following New Design Features Increased dip tube / cyclone diameter ra o Improved cyclone gas inlet geometry Enlargement of gas-riser diameter equal to dip tube Inclined cone p in every cyclone stage Extension of cyclone sizes up to Ø 10.0 m Beneficial Effect Lower pressure loss => less power consump on Higher separa on efficency => less dust loss Lower pressure loss => less power consump on Steady material flow => stable calciner/ kiln opera on Realiza on of higher plant capacity with single string Fig-2: New design KHD Preheater Fig-3: Pressure drop comparison of new design system Pressure drop / Velocity Velocity m/s Pressure drop PA 44 New system Present system new design features have been incorporated in already very well proven KHD Preheater system.