Study On Optimization Of Water Resources Utilization In Typical Coal Chemical Plant

High water consumption of coal chemical industry has become a bottleneck problem for the sustainable development of coal chemical industry enterprises. Therefore, the water saving and wastewater discharge reduction for the sustainable development of coal chemical industry enterprise has the important practical significance.In this thesis, the water network optimization of coal-to-methanol process and coal-to-urea process based on the Texaco coal slurry gasification and four-nozzle coal gasification of Yancon Lunan Chemical Fertilizer Plant was studied. The research work included of surveying the data of water balance; determining the characteristics of the pollutants, limit flow and concentration of the water; screening out the water source and the water trap; optimizing the water network by entering the data of the of the water source and the water trap into the optimization software; simplifying the initial optimal network according to actual production; and putting forward the final optimal scheme. According to optimization scheme, adjustion of the production water supply, low heat energy comprehensive utilization, wastewater recycling were implemented in engineering. After the implementation fresh water can be saved 63.49 t/h, the saving ratio is 4.20%; demineralized water 45.00 t/h, the saving ratio is 10.54%; wastewater reduction 56.00 t/h, the discharge reduction ratio is 25.69%. The remarkable environmental and economic benefits were obtained.The research results can provide the technical support for saving water and reducing wastewater discharge of Yancon Lunan Chemical Fertilizer Plant, also provide the reference for water conservation and wastewater reduction of other industries.