英国上市365平台

CN

Coal Mine Wastewater Treatment

By adopting the combined process of "pre-sedimentation adjustment + coagulation sedimentation + advanced filtration", the system operates stably, and the effluent can be discharged stably in compliance with standards or safely reused.

Overview

Coal mine wastewater refers to the wastewater generated during coal mining and washing.

Main sources: mine wastewater, coal preparation wastewater, coal-to-gas wastewater and domestic wastewater in the mining area, etc.

Water quality characteristics: high concentration suspended solids (such as pulverized coal and rock debris), heavy metal ions (such as lead, cadmium, mercury, etc.), organic pollutants, and possible acidic wastewater. Meanwhile, some wastewater may also contain radioactive elements and high salinity. The overall water quality is complex and poses a serious threat to the ecological environment.

The water quality of "pre-sedimentation regulating tank+coagulation sedimentation+filtration+reclaimed water reuse/up-to-standard discharge" shall meet the Water Quality Standard for Urban Miscellaneous Water Reuse and Reuse of Municipal Wastewater GB/T18920-2020, and the treated water shall be reused for production water and miscellaneous water in the mining area or relevant discharge standards in Emission Standard of Pollutants for Coal Industry (GB20426-2006) and Surface Water Environmental Quality Standard (GB3838-2002) shall be implemented.

The produced water treatment system of the mine adopts "regulating tank+magnetic coagulation reactor+multi-media filter+reclaimed water pond", and the water quality meets the Standard for Water Quality of Urban Miscellaneous Water for Urban Wastewater Recycling and Reuse (GB/T18920-2020). The treated water is reused as production water and miscellaneous water in the mining area.

4444.jpg

System Advantages

1. Non-chemical dosing concentration system: The moisture content is reduced to below 95%; it has fast concentration speed, small footprint, and reduces the subsequent dosage of chemicals;

2. Sludge conditioning system: Special conditioning agents for sludge effectively enhance the water permeability of the sludge. The system conducts real-time monitoring based on the sludge concentration and promptly feeds back information to the PLC control system, achieving precise control over the dosage;

3. High-pressure pressing and dewatering system: The intelligent fully automatic high-pressure press can reduce the moisture content of sludge to below 30% in just one hour, automatically perform pneumatic unloading, and thoroughly clean the filter membrane, ensuring long-lasting and stable operation of the system;

4. Intelligent PLC control system: It adopts an 80-point PLC programmable central control mode to intelligently control the entire system, achieving one-button automatic control of the entire machine through a touch control platform;

5. Resource utilization: After undergoing this process, the moisture content of the mud cake is reduced to below 30%, allowing for diversified subsequent disposal methods, including selling as raw coal, landfilling, incineration, thermal drying, pyrolysis carbonization, utilization in building materials, and composting.

Patented

① Zero Discharge System for Coal Mine Dewatering Water ZL202020693611.X

② A high-speed filter for coal mine produced water, ZL202020693508.5

③ A coal mine water treatment system ZL202022931560.2

④ A new type of coalbed methane produced water purification equipment ZL201520910702.3


Case