Sludge drying is the process of dehumidification and dehydration of sludge through low-temperature drying equipment, the purpose of which is to reduce, stabilize, harmless and resource-based treatment. Whether the sludge can be effectively solved is also related to the maintenance status of the equipment. Xinkunyuan Environmental Protection As a professional R&D and manufacturing of low-temperature heat pump sludge drying equipment, negative pressure low-temperature waste