March 22, 2024 is the 32nd "World Water Day", and March 22-28 is the 37th "China Water Week". The theme of this year's event is "Use water resources carefully, be strict and meticulous" Manage water resources well."
On average, about 2.1 tons of mine water are produced for every ton of coal mined, and approximately 7 billion tons of mine water are produced nationwide every year. As an important part of unconventional water resources, problems such as loss and pollution of mine water have long been obstacles to the high-quality development of the coal industry. How to resolve the "coal-water" resource conflict and remove the label of "high water consumption" and "high pollution" from coal? CCTEG Xi'an Research Institute, as a professional institution specializing in the study of mine water in my country, has never stopped exploring.
CCTEG Xi'an Research Institute has integrated its own professional advantages and relied on more than 60 years of coal geological assurance technology accumulation to build the country's first provincial and ministerial level research platform focusing on mine water and ecological issues in the Yellow River Basin (Shaanxi Province's "Four Subjects and One Alliance" Mining Area in the Middle Yellow River Basin (Coal Mine) Eco-Environmental Protection and Restoration School-Enterprise Joint Research Center) has explored a set of integrated technologies for "control, protection, use and storage" of mine water, and implemented water interception and water control at the source of aquifers through engineering means to reduce the amount of mine water produced; Full-scenario and full-time domain prediction and monitoring of mine water runoff process to control mine water quality and quantity; well-ground joint cascade treatment process purifies mine water and reduces mine water pollution; distributes mine water by quality and user to improve mine water utilization efficiency ; Harmless storage and disposal of mine tail water to avoid water environment pollution in the mining area. Finally, through an intelligent control platform, the entire life cycle of the mine water circulation process can be controlled, achieving the goal of "zero discharge" of mine water, and providing solutions for mine water management and protection. with exploitable solutions to puzzles. Working with coal companies in multiple mining areas, we have explored a reliable path to protect and utilize water resources in mining areas.
Based on different water quality characteristics and resource utilization needs, CCTEG Xi'an Research Institute carries out life-cycle integrated mine water treatment services, integrating feasibility studies, design, environmental assessment and other technical consulting with general project contracting, facility operation and maintenance, etc., to achieve the efficiency, consistency, coordination and comprehensiveness of mine water treatment and resource utilization. It uses coagulation sedimentation, filtration, hard removal, ultrafiltration, reverse osmosis, evaporation crystallization and other processes to couple, and conducts secondary development based on basic principles, integrating digital management and control systems to provide efficient and comprehensive solutions for mine water treatment and resource utilization. Overall life cycle solution. Mine water is no longer the production wastewater in the coal mining process, but has become a water resource that can be treated and reused.
As a state-owned enterprise based in Shaanxi, CCTEG Xi'an Research Institute proactively provides high-quality environmental protection project construction, facility operation and maintenance and technical services to resident enterprises. Based on serving the green and high-quality development of enterprises, it integrates pollution control and emission reduction, comprehensive utilization, water and energy conservation, and efficient operation. The core goals are implemented throughout the project. In recent years, it has undertaken more than 20 large-scale coal mine water and domestic sewage treatment engineering EPC general contracting projects to solve the water pollution problems that restrict coal mine production. The construction projects cumulatively process about 100 million cubic meters of wastewater every year, and reduce the discharge of suspended solids in mine water by about 6- 120,000 tons per year, while reducing chemical oxygen demand, salinity, etc. The treated mine water is used for industrial and agricultural production, ecological supply, etc., saving a large amount of fresh water.
Continue to explore and improve the EPC+O contracting model, effectively shorten the time from construction, commissioning to formal production, achieve efficient, high-quality, and high-level management, and provide high-quality professional operation and maintenance services for coal production enterprises. Since the operation and maintenance business was launched, approximately 10 million cubic meters of industrial wastewater have been processed, and the treated wastewater can be reused as production water for chemical companies.
In order to solve the inconvenient problems of small-scale and geographically dispersed management in industrial and mining enterprises, tourist attractions, resorts, hotels and B&Bs, highway service areas, field construction areas, and rural sewage treatment, an intelligent MBR integrated water treatment equipment was developed based on Industrial Internet+ The idea of product service-oriented upgrades and intelligently transforms traditional equipment. Use regional operation and maintenance teams to replace the operation and maintenance personnel scattered everywhere. At the same time, with the help of data platforms, we can fully improve the reliability of operation and maintenance, ensure the quality of operation and maintenance of water treatment facilities, reduce the difficulty of management, and make unremitting efforts for sewage treatment and reuse.
