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Which sludge can be dried by heat pump sludge dryer

With the construction of industrialization and urbanization and people’s requirements for environmental protection, sludge treatment and disposal has become a new difficulty and a new challenge in comprehensive environmental management. The sludge stacking and landfill treatment methods have caused serious secondary pollution of water sources and land. The new energy-saving heat pump sludge dryer has become more and more important in industrial buildings. So, what fields and types of sludge drying can heat pump sludge dryers be used for?


1. Domestic sludge. In urban construction, the organic content of domestic sludge is high, generally up to 30-60%, and the water content is relatively high, usually up to 95% -99%, even after dehydration, there is still 60% -80% water. At the same time, domestic sludge contains a large number of pathogenic bacteria and parasites, which are easy to rot and smell, spread bacteria, and affect people’s health. In view of the characteristics of this kind of sludge, the sludge dryer can receive good social benefits through sterilization and drying processes.

2. Electroplating sludge. The treatment of wastewater by electroplating is the main cause of sludge. The electroplating sludge has a small organic content and a small calorific value, and contains many heavy metals.

3. Tannery sludge. The heat pump sludge dryer has been widely used by tannery. The output of tannery sludge is large. Under normal circumstances, it can produce 40-80 tons of sludge per day. The content of organic matter in the tannery sludge is high, because a lot of fur will be produced during the leather processing, the content of organic matter is very high, and there are many toxic substances.

4. Printing and dyeing sludge. Printing and dyeing sludge accounts for 0.3-1% of the total sludge volume, similar to domestic sludge, with high water content, not easy to dehydrate, and large volume and mass. Because printing and dyeing sludge is generally higher in inert substances, while the content of organic matter and pathogens is less, the calorific value is also lower, and the content of heavy metals is generally higher.

5. Petrochemical sludge. In industrial production, the composition of petrochemical sludge is relatively complex, it contains different types of heavy metals. Generally, petrochemical sludge contains oil, has high viscosity, high water content, low organic content and low calorific value.

6. Papermaking sludge. The ash content of paper-making sludge is relatively large, which can generally reach 50-70%. The hot land and the water content are relatively high, which can generally reach 95-99%. , And contains a lot of fiber. After the sludge dryer dries it, it can realize the comprehensive utilization of resources.


Post time: Jun-03-2020