Dry sludge with heat pumps
The Evaporative Dryer (EVD) further dries cake produced by either ELODE or mechanical dewatering equipment (eg. belt press, screw press, centrifuge).
This low temperature belt dryer processes cake at 10%DS+, drying it up to 90%DS+ to achieve Class A biosolids with a low operating temperature (≤85˚C).
The EVD uses heat pumps in a closed loop, convection process to maximize heat recovery and minimize energy waste, consuming 400 kWh to remove 1 ton of water.
Dry up to 90%DS+ and produce Class A biosolids
EVD works well with:
ELODE-dried cake
Municipal water & wastewater treatment
Paper, pulp mills
Organic chemical, pharmaceutical plants
Drilling fluid / mud
Food, fruit, vegetable processors
Dairy, milk processors
Slaughterhouses, butcheries, meat, poultry processors
Farms, manure, animal waste
Breweries, beverage producers
Textile, leather industry
Other organic waste
Municipal
18%DS
95%DS
Industrial
12%DS
90%DS
EVD vs. Other Sludge Dryers
How EVD dries sludge cake
The EVD uses warm air convection inside a closed loop heat pump dryer without heat loss:
Sludge cake enters the shaping machine inlet, evenly extruding and distributing the cake "spaghetti" across the belt.
Dry warm air passes over the wet cake, collecting moisture as the two belts convey the dried cake to the exit.
The A/C evaporator fins capture the moisture.
The dehumidified warm air is reheated by the heat pump and sent back into the drying chamber.
The dried sludge cake is discharged and conveyed away from the dryer.
EVD Specifications
Note: Specifications are subject to change depending on many factors. There are thousands of types of sludge - we may modify the machine to better suit our customer’s application.
