Reconstruction and practices on energy saving of water circulation system in Daliuta Coal Preparation Plant

In order to improve the energy uiliation efficiency of the water circulated system for coal preparation, in combination with the energy saving practices o n the water circulated system applied in Daliuta Mine, the paper discussed the problems existed in the water circulated system of Daliuta Coal preparation plant with th e application of the impeller cutting energy saving method of the water pump, energy saving of variable frequency speed regulation, water pump reconstruction with thre e dimensional flow and other energy saving methods. With the analysis and comparison conducted, the paper provided solution and technical plans suitable for energy saving of system. The limit and restriction on the water circulated pump only was broken through, the available equipment resources were fully utilized, the optimum Co mbination of system was considered and the equipment interfaces were smoothly connected to meet the upgrading of production requirement and to enhance the match ing optimization of system function. The performances of electric motor could be fully utilized and finally the system equipment performances could be improved by 50% as the energy saving achievement. The practices in Daliuta Coal Preparation Plant showed that the energy saving of the system was better than the energy saving of th e equipment and the full consideration was better than the energy saving idea of single item and single object which could provide beneficial trial further to develop the study on the energy saving potential of the water circulated system for the coal preparation.