Polyaluminum chloride is used for the treatment of drilling mud waste. With the continuous development of the petroleum industry, pollutants generated during the production process enter the environment through various channels, especially those containing drilling waste mud pits distributed near farmland. With the overflow of rainwater, it poses a significant threat to agricultural production. Therefore, the disposal of drilling mud is particularly important.
General drilling mud wastewater treatment process:
Raw sewage → sieve → coagulation → sedimentation → filtration adsorption → treated water
The original sewage is first pre treated through a sieve to intercept some suspended solids, and then enters a coagulation equipment. The suspended solids are formed into flocs by coagulation method. After sedimentation, the flocs form sludge deposition. At this time, the effluent contains a small amount of suspended solids and soluble organic matter. The suspended solids are first filtered by quartz sand, and then the dissolved organic matter in the water is removed by activated carbon.
Adding coagulants to remove suspended solids in drilling mud wastewater treatment is one of the most commonly used methods. Polyaluminum chloride has a wide range of applications, is easy to quickly form alum flowers, has good sedimentation performance, is suitable for a wide range of pH values, has low corrosiveness to equipment, and can achieve good coagulation effect when used in combination with polyacrylamide (polyaluminum chloride dosage of 4mL/100mL, polyacrylamide dosage of 0.3mL/100mL).
