Coal washing wastewater is the wastewater containing coal dust, fly ash, solid particles and chemical substances produced in the production process of coal mines. In order to reduce the impact on water resources and the environment, coal washing wastewater usually needs to be treated.
stay Coal washing sewage treatment Common treatment methods include physical treatment and chemical treatment. Physical treatment is mainly aimed at the removal of solid particles and suspended substances, while chemical treatment is mainly used to remove chemicals and pollutants in sewage.
The following steps and equipment are commonly used in the treatment of coal washing wastewater:
1. Pretreatment: coal washing wastewater usually contains a large number of solid particles and suspended solids. Pretreatment steps often include screening, sedimentation and filtration, which are used to remove large solid particles and suspended substances.
two Horizontal screw centrifuge : recumbent snail Centrifuge It can be used for coal washing sewage Solid-liquid separation The solid particles are separated from the sewage by centrifugal force to reduce the content and concentration of solid particles.
3. Sedimentation tank: The sedimentation tank makes small suspended substances settle to the bottom of the tank by gravity, so that clear water on the upper surface can be separated, and solid particles and suspended solids can be removed.
4. Filter or filter cloth: The filter or filter cloth can be used to further remove small solid particles and suspended substances.
5. Chemical treatment: chemical treatment can coagulate, flocculate or separate chemicals and pollutants in sewage by adding coagulants, flocculants or antifoams and other chemicals to facilitate subsequent treatment and disposal.
6. Post treatment: The treated coal washing sewage may need to be disinfected, neutralized and precipitated to meet the discharge standards or further recycled.
In the process of coal washing wastewater treatment, appropriate treatment steps and equipment combination should be selected according to the characteristics of coal washing wastewater, treatment effect requirements, treatment capacity and economic considerations. At the same time, pay attention to the inspection and maintenance of the treatment equipment, and dispose the waste residue and waste water in compliance with the regulations to ensure the efficient, safe and environmental protection of the coal washing sewage treatment.
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