Sludge water dryer, also called sludge dryer, is a drying equipment specially used for drying sludge. The sludge dryer can be widely used in activated sludge drying, sewage sludge drying, petrochemical sludge drying, papermaking sludge drying, printing and dyeing sludge drying, tanning sludge drying, electroplating sludge drying, municipal sludge drying, All kinds of sludge such as biological fermentation slag and various high-humidity materials such as various slag are dried.
Today, we are going to introduce you to several main drying processes of sludge dryer: paddle heating drying, solar drying, high temperature wet oxidation drying and air energy heat pump drying process.
1. Paddle heating and drying: The drying process uses a heating and drying system to achieve drying. This process mainly includes a dryer, sludge feeder, auxiliary heat source, air supply system, heat recovery device, dust Control, ash discharge, control system and other devices.
2. High-temperature wet oxidation drying: This drying process introduces sludge and pure oxygen into the reaction vessel at the required temperature and pressure at the same time. In the case of high temperature and high pressure, pure oxygen does not require the use of catalysts. Organic matter is oxidized, and a small part of the remaining sludge can be dehydrated and dried mechanically to achieve the purpose of drying. This sludge dryer process is suitable for non-agricultural occasions, but it can be used as a building Raw materials are re-used.
3. Solar drying: This process uses solar energy to evaporate the dehydrated sludge, and 60 to 80% of the dried sludge can be obtained by evaporation. At the same time, during the operation, the sewage can also be removed by using the stirring wheel The mud is overturned and tiled on the floor, and the efficiency of evaporation can also be improved by adding forced ventilation. In general, this solar drying process has a simple process design and low investment and operating costs. It is more suitable for users with low sludge production requirements and long-term storage.
4. Air-energy heat pump drying: The wet sludge is crushed and extruded into the heat pump sludge water dryer, which is converted into dry sludge after heat exchange with the heat drying circulating air, and the hot drying circulating air becomes It is wet low-temperature circulating air. The wet low-temperature circulating air is sucked into the heat pump through the circulating fan, and is blown into the intermediate heat exchanger from the circulating fan to exchange heat with the evaporating air to further reduce the temperature. The temperature of the cold coil is lowered again. After the air is discharged, it evaporates through the evaporator and the condensed water is precipitated. The evaporative air passes through the intercooler and the heat pump return air for heat exchange. Enter the belt sludge oven for circulating treatment. Heat pump drying has low energy consumption, no secondary pollution, low drying temperature, high safety, high degree of automation, and low cost of sludge drying.
Post time: Jul-27-2020