Sludge Drying by Virtue of the Solar Energy and Reclaimed Water Heat Pump with Double High-Temperature Heat Source

Abstract

Sludge is the solid waste that generated during the sewage treatment process, because of high moisture content limits the final disposal and utilization. In this paper that solar and reclaimed water as heating heat source, It's not easy to design a new drying procedure that solar energy and reclaimed water heat pump with double high-temperature heat source, the system could make full use of respective advantages which of the solar energy, the hot of reclaimed water and heat pump. It would enhance the dehydration ratio, and high efficiency, lower energy consumption, sludge of moisture content (MC) decreased greatly; have created favorable conditions for the reuse. Technology what solar energy, air and reclaimed water heat pump with double high-temperature heat source were used to deal with sludge, the solar energy and air source heat pump were the main heating source. When the heat was insufficient, reclaimed water heat pump was turned on as energy supplementary. The dry air (70°C) was pumped into drying room continually; the moisture content (MC) of sewage was shrunk from 75% to 40% after drying.