Sludge is the industrial waste generated during the production process of municipal sewage processing. Because sludge has many disadvantages such as high moisture content, high viscosity, high water holding capacity, and low calorific value, it is difficult to achieve industrial utilization. Dingli Company operated a series of technical researches on the current market situation of sludge treatment and the characteristics of sludge in various regions. Dingli Company concentrating created a new generation of sludge rotary drum drying system, drying product moisture can be reduced to less than 25%, achieving the standard of sludge landfill and further incineration processing conditions. The technology of equipment gets absolutely mature enough, also it has a stable capacity for operation and very convenient to operate and maintain.
The sludge drying system includes: heat source, drying equipment, conveying equipment, dust removal and deodorization equipment.
Heat source ①: Adopt natural gas combustion, plus heat storage type to improve the combustion efficiency of natural gas.
Heat source ②: Use biomass pellets, wood chips, branches, straw, coal, etc. as fuel.
The working principle of the drying area: Patented products, scattered drum dryers are used. There is a high-speed dispersing shaft inside the dryer to disperse the viscous sludge, solve the problem of sludge viscosity, and also improve the heat exchange efficiency. Set one, two, three, four, five six drying process working areas in the dryer, the final material moisture is less than 25%, complete the entire drying process, discharged from the dryer, and enter the next process.
Dust removal and deodorization equipment: The system adopts a four-stage dust removal and deodorization method, and a first-stage cyclone dust collector can remove dust particles in the exhaust gas. The two-stage pickling method removes odorous gas, the third-stage adopts alkaline washing method to remove the odorous gas, and the fourth-stage adopts ultraviolet decomposition method. The final odorous gas can be controlled within 2000 dimensionless.
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