The demonstration project for the resource utilization of wastewater from China Coal Hubei Energy Chemical Co., Ltd. passed the **scientific and technological achievement appraisal

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The demonstration project for the resource utilization of wastewater from China Coal Hubei Energy Chemical Co., Ltd. passed the **evaluation of scientific and technological achievements. Author/Source: China Coal Energy Group; Date: November 14, 2019; Clicks: 46. According to a report from China Coal Energy Group in November 2019, the key scientific and technological project undertaken by China Coal Hubei Energy Chemical Co., Ltd., namely the “Project for the advanced treatment and resource utilization of coal chemical wastewater and mine water, as well as the development and demonstration of ‘zero-discharge’ technologies,” successfully passed the evaluation of scientific and technological achievements organized by the China Petroleum and Chemical Industry Federation. At the achievement appraisal meeting, it was unanimously agreed that the project featured distinct innovation; taking into account the water quality characteristics of the fixed-bed pressurized gasification process, a comprehensive set of treatment technologies for coal chemical industry wastewater was developed through integration and innovative optimization ； Based on the characteristics of mine water in the Ordos region, integrated advanced treatment technologies for mine water have been developed to achieve efficient recycling of this water ； Technologies for the reuse of concentrated brine from coal chemical industries and mine water have been developed; the products sodium chloride and sodium sulfate meet the top-grade standards set by national regulations. The outcomes of this project have been successfully applied at China Coal Energetic Chemicals Company, enabling long-term stable operation. The coal chemical wastewater and mine water, after treatment, meet all the standards required for use in chemical processes. These solutions have also been adopted by surrounding enterprises, resulting in significant benefits for the ecological environment and society. Experts unanimously agreed that, upon technical evaluation, the project as a whole has reached an internationally advanced level. This technical research took 5 years, during which zero discharge of coal chemical industry wastewater, advanced treatment and reuse of mine water, and recycling of concentrated saltwater were achieved. By applying this technology, the reuse rate of wastewater can reach up to 98%; the sodium chloride produced meets the first-class standard for refined industrial salt, while sodium sulfate also meets the first-grade standard. Currently, this technology has achieved long-term continuous and stable operation in the coal mine and coal chemical wastewater treatment systems of Enerchemical Company. It not only enables zero discharge and resource utilization of coal chemical industry wastewater and mine water, but also ensures that all processes in chemical production use treated mine water, eliminating the need to draw water from natural sources. In 2018, ENEC achieved direct economic benefits of 110 million yuan through this technology, thereby realizing a harmonious integration of economic, social, and environmental benefits.