In conventional sludge drying plants in wastewater treatment plants, the vapor pressure difference is the main driving force for evaporation to the atmosphere. In industrial wastewater treatment plant drying equipment, auxiliary heat is applied to increase the steam retention capacity of the surrounding air, which helps generate the latent heat required for sludge water evaporation. The purpose of heat drying is to remove as much moisture as possible so that it can be burned and disposed of efficiently, or it can be further processed into fertilizer.
The temperature between the sludge and air interface can be seen as the wet bulk sludge temperature of the total volume of dry air, all of which are only true if the air temperature and the temperature of the surrounding surface of the container are approximately the same. Drying is important in fertilizer production, allowing the sludge to be ground and mixed; compressing its weight and preventing its continued biological action, which would otherwise degrade it. The moisture content of the dried sludge must be controlled and removed.
By exposing more areas to the drying airflow supply, you can dry faster and get results faster. In fact, the contact between the dry air and the wet sludge should be made larger so that the difference in humidity between the two interfaces becomes larger; and it contributes to smooth operation and efficient use of energy.
