Coal mine water refers to all the water that penetrates into the underground mining space during the coal mining process, and sometimes also contains a small amount of infiltrated surface water. Coal mine water treatment technologies mainly include neutralization of acidic water, flocculation treatment to remove suspended particles, reverse osmosis to remove soluble salts and other technologies and combinations. Take various methods to remove or reduce harmful substances in mine water to make it meet the discharge standard and meet the requirements of the environmental quality standard of the receiving water body, or treat the target water quality of various needs. Mine water generally contains suspended solids mainly composed of coal rock powder and soluble inorganic salts, with less organic pollutants and generally no toxic substances. Therefore, the purification treatment and utilization of mine water will produce huge economic and social benefits.
Clean mine water. Special water pipelines can be set up to lead out for use, and disinfection treatment is required for drinking water.
General mine water. Suspended solids are removed underground or on the ground by sedimentation. One is to use the underground water tank for treatment, divide the water tank into several sections, add flocculant before the mine water enters the water tank, settle and overflow through each section of the water tank, and finally meet the discharge standard. The other is to build a sedimentation tank on the ground, and the mine water is discharged into the sedimentation tank after sedimentation.
When the mine water treatment capacity is small, a combined water purifier is also used. It is equipment that integrates coagulation, sedimentation, filtration and other processes. It has the characteristics of saving one-time investment, small footprint and convenient operation.
High salinity mine water. Commonly used treatment methods are distillation, electrodialysis and reverse osmosis. Electrodialysis is generally used. The electrodialyzer must be strictly pre-treated, the turbidity of the water entering the electrodialyzer should be controlled below 3°, and it should be ensured that Fe, Mn, Cl, etc. meet the specified requirements.
Acid mine water. The neutralization method is adopted, and lime or limestone is used as the neutralizing agent. Usually, there are three technological processes: direct lime addition method, limestone neutralization drum method and open-flow variable filtration rate expansion neutralization method, and the precipitate is formed and then filtered.
Therefore, different treatment processes require different pipes and valves in order to build a suitable mine water treatment pipeline system to maximize the treatment effect. For mine water treatment, the valve materials are stainless steel, carbon steel, duplex steel, UPVC, CPVC or PVDF to meet the needs of various processing technologies.
Reverse Osmosis Project In China
Ball valves, butterfly valves, gate valves and globe valves belong to shut-off valve types. They all have an opening and closing part, which could transport or cut off the water flow by opening or closing the opening and closing parts. They are commonly used valves in water treatment and processing pipelines. Ball valves and butterfly valves are both quarter-turn valves, easy to open and close and easy to operate. Gate valves and globe valves are both linear-operated valves, with large sizes and wide application ranges.
Regardless of the type of shut-off valve, it can be operated with electric actuators, pneumatic actuators or manual actuators.
The check valve is a valve that automatically opens or closes depending on the pressure of the pipeline. It is used to prevent the backflow of the medium in the pipeline and ensure the normal operation of the pump, water flow meter, or other motors.
The Y-strainer is a valve used to filter impurities in the pipeline, making all the fittings in the pipeline work more smoothly, and reducing the downtime and maintenance cost of the pipeline system.
Choosing the right valve can increase the productivity of the entire system and reduce losses due to downtime. Any demand for valves, feel free to consult us for a free valve solution. email@example.com