The main components of coal-washing sewage are fine coal powder and clay county floats, which have a very strong suspended properties in water and are difficult to remove by natural deposition. Coal-washed water is characterized by a “triple difficulty”, i. E. High colour, high turbidity, high chemical oxygen demand and difficult to biodegrad. For the characteristics of coal-washing wastewater, the impurity in water can be effectively removed and the water reduced to clean water, which requires the use of polypropyleneamide, a specialized chemical in coal-washing plants。
Polyacrylate
The process of treatment of sewage from coal washing plants in general is divided into three steps: condensation-silent-pressed mud, and clarified water liquids can be recycled, reducing not only business costs, but also water waste。
The treatment of sewage from coal-washing plants generally requires a sewage reaction pool, with three to five sewage sediments and a filter, with the first proportional dissolution of polyacrylate and aluminium polymeric chloride, followed by the initial formation of pac in the front of the sediment tank, and the rapid sinking of the cavity by adding pam (polycinylamine) solution as a condensant (also known as a condensant)。
A frame filter
Coal-washing sewage treatment is generally divided into sedimentation, filtration and condensation:
The advantages of sedimentation are not added to the adhesive filter, but are dependent on natural deposition. The disadvantages are the size of the sediment ponds and the length of their sedimentation, which are rarely used by coal-washing enterprises。
The filtration method is suitable for use by large coal-washing plants, which invest more in filtering equipment and are not suitable for use by small and medium-sized coal-washing enterprises。
Condensation is currently one of the indispensable condensants in our small, medium and large coal-washing plants, and the general treatment of coal-washing sewage requires only a small amount of anionic or non-ionized polyacrylates to achieve efficient condensation. Sometimes pacs are used in combination depending on the quality of water。
Based on the experience of the technical staff of henanchanga environmental technology co. Ltd. Running the site, the treatment of coal sewage by condensation is most appropriate, not only in terms of simple operating procedures, lower usage costs, but also in terms of its effectiveness。
