The components of oil - containing wastewater in mines are complex.
Oil substances: The oil - containing wastewater mainly comes from the leakage of lubricating oil and hydraulic oil of mechanical equipment during coal mining, as well as the seepage of crude oil from coal seams. Oil substances exist in various forms such as floating oil, dispersed oil, emulsified oil, and dissolved oil. Among them, emulsified oil is more difficult to treat due to its high stability.
Solid suspended matter: Mine wastewater contains a large amount of solid suspended matter such as coal dust, rock fragments, and clay. The particle sizes of these suspended matters vary, with the small ones being colloidal and the large ones reaching several millimeters. They interact with oil substances, increasing the difficulty of wastewater treatment.
Dissolved substances: Mine oil - containing wastewater also contains various dissolved substances, such as various metal ions (such as iron, manganese, calcium, magnesium, etc.), acid - radical ions (such as sulfate, carbonate, etc.), and some soluble organic substances. These dissolved substances affect the properties of the wastewater such as pH and conductivity.
When choosing a demulsifier for mine oil - containing wastewater, it is necessary to select the appropriate type of demulsifier and dosage according to the specific components of the wastewater and the properties of the oil substances. At the same time, conditions such as temperature and pH value need to be well - controlled during the demulsification process to ensure the best demulsification effect. In view of the water quality characteristics of mine oil - containing wastewater, separation treatment is carried out to remove the oil and suspended particles, improve the water quality standard, and use it as the water source for mine water injection. During the treatment of oil - containing wastewater, for the removal of oil droplet particles, a demulsifier is used in combination with air flotation to separate the oil in the oil - containing wastewater. However, in the case of a stable emulsion formed by oil and water, a demulsifier must be applied to achieve the separation of oil and water. Therefore, it is necessary to select the best demulsifier to separate the oil in the oil - containing wastewater, achieve the treatment effect of oil - containing wastewater, and meet the technical requirements for the treatment of mine oil - containing wastewater.
中文
English
