Economic Analysis of Cascade Utilization of Mine Water and Recycled Water of Electric Power Plant

The scheme selection and system design of the regional central air conditioning system of Xiezhuang Coal Mine were presented. The cascade utilization of Mine water and recycled water of electric power plant was realized in this system. The system works well with decent economic benefits and accord with energy conservation and pollution reduction. At the same time, the economical efficiency and emission reductions of this system were analyzed, providing reference for regional central air conditioning system of the same type. The modulus of this system reaches comprehensive energy efficiency coefficient 4.83 in summer and 23.41 in winter. The increasing income and the saving investment are about RMB1.87b/a. CO₂ emission reduction is 249.4t/a, SO₂ 11.3t/a, smoke and dust 8.5t/a, ash 147.4t/a.