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Energy-saving revamping of blowers for roasters with high-voltage variable frequency technology

Zhao Daling [Power Branch,Phosphate Fertilizer Plant,Wengfu(Group)Co.,Ltd.,Wengfu,Guizhou,550501,China]  
High-voltage variable frequency speed regulators were installed at tow blowers for roasters to adjust air pressure and flow by varying rotating speed of motor instead of adjusting air damper.The principle of energy saving with variable frequency frequency-varying technology is discussed and the structure and configuration of the regulator are described.At the same air rate,32%of energy consumption was decreased by revamping while steadier and safer running and less machine wear are obtained,resulting in low maintenance and production costs.
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