Sludge reduction by drying municipal sludge

The municipal sludge drying equipment adopts hot air direct drying method to dry the sludge. The internal installation of a special breaking device can continuously stir and break up the sludge, which not only solves the problem of mutual adhesion and wall sticking of sludge, but also speeds up the contact between sludge and hot air, and speeds up the evaporation of water in sludge. Municipal sludge drying equipment can achieve the goal of sludge reduction, stabilization, harmless and resource treatment. The dried sludge can be used for sanitary landfill, incineration, fertilizer and building materials.

The municipal sludge drying equipment has strong adaptability and can be used to treat all kinds of sludge. It has a wide range of heat sources, such as coal, gas, oil, electricity, steam, biomass particles and boiler flue gas waste heat resources. At present, low temperature drying process is more popular in the market. Using this drying process to dry sludge can not only reduce the generation of dioxin and other toxic gases in the drying process, but also reduce energy consumption and carbon emissions, which meets the requirements of national low-carbon environmental protection. The municipal sludge drying equipment has the advantages of good treatment capacity, low production cost, good drying effect, no secondary pollution and high safety performance. The dried sludge improves the use value and economic value, and can increase new economic benefits for enterprises.

The sludge is fed into the cylinder of the equipment through the feeding device for drying. Under the action of the hot air distribution system, the drying temperature, air volume and wind speed can be adjusted according to the moisture content of the sludge in different drying stages. In the process of sludge drying, the higher is higher, the middle is moderate, and the lower is mixed with the lower, so that the sludge is always in the ideal drying environment. The whole drying system is composed of chain and interaction. It can not only improve the efficiency of sludge drying, but also ensure the quality of sludge dried products.

In addition, the flue gas dust generated in the drying process of sludge is filtered, purified and dusted down through the induced draft fan into the dust removal equipment. If the gas contains sulfur, it needs to be desulfurized to meet the requirements of gas emission, and then automatically discharged. At present, the common dust removal equipment includes cyclone, bag filter, electrostatic precipitator, pulse filter and water film filter. The configuration of the equipment is based on the comprehensive analysis of the characteristics, heat source and treatment capacity of the user's sludge treatment, so as to configure the appropriate dust removal equipment for the user.