Sludge treatment equipment

In the sludge treatment and disposal strategy of sewage treatment plant, sludge drying technology has been recognized as a safe and reliable treatment method. High active quicklime is added in the sludge treatment technology of thermal drying by calcium addition. Through mixing and mixing, the quicklime reacts with the water in the sludge to generate heat and dry the sludge. It is an economic and effective process for the disposal of excess sludge with low operating cost and simple operation. It can effectively disinfect, sterilize, deodorize and reduce sludge at the source. The calcareous soil produced by this technology can be used as raw materials for brick making, filling materials for Subgrade Engineering and covering soil for landfill site. In the process of application, the heavy metal ions in the sludge can be effectively captured and solidified, which can thoroughly control the secondary pollution of municipal sludge to the environment and realize resource recycli1ng.

Technical features           

The addition ratio of chemicals used in the treatment of sludge with different moisture content is also different. At present, the moisture content of dewatered sludge in most sewage treatment plants is 70 ~ 80%, and the moisture content after plate and frame pressure filtration is 60 ~ 70%. The reagent addition ratio of the technical method is as follows: when the sludge with high moisture content is 80%, the agent addition ratio is ≤ 30%; when the sludge with water content is 60%, the agent addition ratio is ≤ 20%. The source of sludge in the sewage treatment plant can be effectively disinfected, sterilized, deodorized and reduced. It is processed and dried into inorganic calcium increasing, drying and calcifying soil with water content ≤ 40%. It is transported to lime soil mixing station for further resource utilization and deep processing, and becomes the basic material for harmless construction materials, or directly used for covering soil and temporary pavement of landfill site. Compared with other sludge drying technologies, it can reduce the waste of resources. Moreover, in urban construction, due to the accelerating urbanization process in the suburbs, the shortage of materials has led to the purchase from more and more distant areas, which greatly increases the construction cost. Sewage treatment plants are generally located in the surrounding areas of urban areas            What is more and more distant transportation distance caused by the increasing transportation cost. At the source of sewage sludge, it can be processed into useful inorganic building materials, which can be used for urban construction and road construction nearby. On the other hand, after the sludge is dried, it can effectively eliminate the peculiar smell, improve the environment around the treatment plant, and reduce the amount of sludge for transportation Toxic and harmful wastes are transformed into useful resources for urban construction, providing reliable implementation scheme for sludge treatment and disposal of domestic sewage treatment plants.