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The Siemens indirectly heated dryer is an efficient heat drying system, designed to minimize the consumption of energy, maximize the reduction of biosolids volume, protect the environment from unwanted emissions, and offer a high degree of system safety and reliability.
With the indirectly heated dryer, you can…
- Process 1 to 100 wet tons a day.
- Customize your drying process.
- Reduce your sludge volume by 75%.
- Eliminate the need for external backmixing.
- Produces a "Class A" environmentally- friendly end product.
How does it work? Learn more here  Principles of Operation
Read the article in the November issue of Water Environment & Technology on Biosolids Dryer Safety.
 Learn more about using Class "A" Sludge as a Fertilizer.
Dual Indirect- Heat Source - Two heat sources for better operational control.
- Ensures safety- the sludge never comes into contact with the heat source.
- Increases efficiency- the two heat mechanisms use 1100-1500 BTU’s per pound of water evaporated.
Completely Isolated Drying Chamber - Operates under a negative pressure.
- Promotes a clean work environment.
Continuous Single- Pass System - Avoids recontaminating the sludge.
- Minimizes energy consumption and related operating costs.
Operational Safety - Over 15 safety interlocks.
- Designed to the applicable guidelines of the National Fire Protection Assocation (NFPA).
- Pressure relief management system designed per NFPA 68.
- Dehydration Drum inert blanket as defined in NFPA 69.
- The Hot Oil System is designed, built, tested and code stamped per Section VIII, Division 1 of the ASME Code.
- The Hot Oil Heater and Hollow Flight Auger are registered with the National Board.
Skid Mounted Design - Provides for faster installation and smaller footprint.
- Allows flexability when installing in an existing building.
- Allows isolation of the Hot Oil Unit for a safer, quieter work environment.
Marketable "Class A" End Product Average Characteristics - Density 45 lbs./ft.3
- Dry solids content 90 - 100 percent
- Color brown to black
- Appearence granular - fines to 4mm
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