Shuntec drying equipment for sludge can directly drying sewage or sludge with a moisture content of 83% into dried sludge with a moisture content of 10%-30%. The drying process can effectively sterilize the sludge, and it is energy-saving and no-pollution.It is widely used in drying municipal sludge and industrial sludge, including printing and dyeing industry, papermaking industry, electroplating industry, chemical industry, leather industry, pharmaceutical industry, etc.. The finished dried mud with moisture content of 10-30% can be processed by gasification, mixed burning, composting, or could be processed into building materials.
Step 1: The wet sludge with a moisture content of 60%-80% is crushed and extruded into a belt-type sludge drying oven;
Step 2: After heat exchange with the drying circulation air, the wet sludge in the belt-type sludge drying oven is converted into dried sludge with a moisture content of less than 30%, and the hot circulation air has converted to wet&low-temperature circulation air.
Step 3: The wet & low-temperature circulating air is sucked into the heat pump by the circulating fan, and blown into the intermediate heat-exchange facility. After a heat exchange with the evaporated, the temperature becomes lower;
Step 4: The low-temperature circulating air is discharged from the intermediate heat-exchange facility, and the temperature drops down after passing through the desuperheating coil;
Step 5: The wind from the desuperheating coil is evaporated by passes through the evaporator, and the temperature drops below the dew point, so that condensed water is precipitated;
Step 6: After the heat exchange between the intercooler and the heat pump return air, the temperature of the evaporation air was rose and then enters into the condenser;
Step 7: After the circulating air further heated by the condenser, it will converted into heated and dried circulating air and will enters into the sludge drying oven to realize circulating treatment. Generally, the temperature of the drying circulating air is better at 60-70℃, the humidity is better below 20%. After it has being processed by the belt-type drying oven and enters into the heat pump, the temperature of the circulation air becomes low and wet, and it is better at 50-60℃, and the humidity is better above 50%.
Sludge drying process: By using the closed dehumidification principle of heat pump, the wet sludge on the mesh belt is dehydrated and dried by convection hot air. The entire system is fully enclosed, and the hot air has no heat loss during the drying process. As the low-temperature drying equipment does not need to add quicklime and iron salt, it saves transportation cost of sludge. The sludge drying process can be widely used in the production field of municipal sludge and industrial sludge. The dried sludge can be processed by gasification, mixed burning, composting, or could be processed into building materials. The advantages of Shuntec sludge drying equipment include: easy to install, high efficiency, energy saving, environmental protection, pollution-free, safe and reliable operation, long service life, low maintenance cost, comfort and convenience, high automation and high degree of intelligence.