ZHANG Shan?shan,JI Hai?hong,WU Qiao?ling,et al.Zero Discharge Treatment Technology and Engineering Application of Coal Mine Water[J].China Water & Wastewater,2022,38(No.2):98-103.
Zero Discharge Treatment Technology and Engineering Application of Coal Mine Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
No.第2
Page:
98-103
Column:
Date of publication:
2022-01-17
- Keywords:
- coal mine water; zero discharge; pretreatment; concentration reduction; evaporative crystallization
- Abstract:
- Taking the zero discharge project of a coal mine in Shaanxi Province as an example, the process of pretreatment, concentration reduction and evaporative crystallization is studied, and the operation effect, cost and benefit of the system were analyzed. The results showed that when the amount of coal mine water was 1 900 m3/h and the concentration of TDS was 3 200 mg/L, the mine drainage had achieved zero discharge for a combined process including coagulation, clarification and filtration in pretreatment stage, reverse osmosis and disc tube reverse osmosis(DTRO) in concentration reduction stage, and finally mechanical vapor recompression (MVR) in evaporative crystallization stage to treat the effluent TDS to about 418 mg/L，which could satisfy the design and reuse requirements. The sodium sulfate salt produced in evaporative crystallization stage was about 4.9 t/h with purity of 99.12%, which could be used as chemical raw materials.
Last Update:
2022-01-17