In view of the current market status of sludge treatment and the characteristics of sludge in various places, Dingli has conducted technical research and practice many times, and carefully built a new generation of sludge drum drying systems.
Sludge is the product of sewage treatment, which is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. The main characteristics of sludge are high water content (up to 99%), high content of organic matter, easy to rot and smell, and the particles finer, the specific gravity is smaller, and it is in a colloidal liquid state. It is a thick substance between liquid and solid, which can be transported by pump, but it is difficult to separate solid and liquid by sedimentation. The concentration of suspended solids is generally 1% to 10%, and the concentration below this level is often called mud. Due to the different sources of sludge and different water treatment methods, the properties of the sludge produced are different. There are many types of sludge, and the classification is more complicated. Generally, it can be classified according to the following methods.
Sludge dewatering is an important part of the whole sludge treatment process, its purpose is to enrich solids, reduce the volume of sludge, and create conditions for the final disposal of sludge. Sludge dewatering and drying include natural dehydration, mechanical dehydration, and heat treatment drying.
After the sludge is concentrated and digested, it still has a moisture content of 95%~97%, and it is easy to be corrupted and smelly. The sludge needs to be dried and dehydrated. Commonly used dehydration methods include natural drying and mechanical dehydration.
In order to further reduce the moisture content (75%) of the dewatered sludge, a drying process is adopted. After drying, the moisture content can be reduced to about 20%. In addition to the simplest drying process, heat drying technology is commonly used. Sludge drying can completely kill pathogenic bacteria and stabilize the sludge. However, a large number of waste gas purification costs and operating costs generated during the drying process are issues that must be considered when using the drying process.
The internal structure of the Dingli sludge dryer strengthens the cleaning and heat conduction of dispersed materials, eliminates the adhesion phenomenon on the inner wall of the cylinder, and has stronger adaptability to the moisture and viscosity of materials. The unique bulk sludge delayed drying technology is adopted to ensure the uniformity of coal slime drying.
Dingli sludge dryer has strong overload resistance, large processing capacity, low fuel consumption, and low drying cost. The equipment technology is absolutely mature, the operation is stable, and the operation and maintenance are convenient. For more information, welcome to consult online.
