Bridging the Technology Gap Between Standard Evaporation and Drying Systems
General Description of the HESC™ System
HPD's High Efficiency Stillage Concentration (HESC™) system bridges the technology gap between the evaporation equipment and drying systems that are typically supplied to the standard ethanol plant.
The system enables a significant reduction in power consumption when compared to conventional methods of water removal from stillage. It also provides operational benefits to new or existing evaporation plants in ethanol production.
The HESC system concentrates stillage to higher solids
Unique, Proven Technology to Provide High Solids Concentration
The High Efficiency Stillage Concentration (HESC™) system concentrates stillage from still bottoms in ethanol production and serves as an intermediary step between the evaporator system and final water removal in the dryer.
The system provides the following benefits for new and existing plants :
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Concentrates syrup to greater than 50% TS with minimal fouling utilizing proven, enhanced forced circulation (patent pending) technology
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Reduced natural gas usage decreases emissions to allow more ethanol produced for given air permit
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Recovers quality condensate otherwise lost in standard drying equipment
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Modular design for simplified integration into existing plants, expansions or new facilities
Economic Benefits of Reducing Dryer Duty
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The HESC system is simply integrated into new or existing evaporation plants
Simple Process Integration
Producing high solids prior to drying the product reduces evaporation duty to the dryer, thereby decreasing power consumption during the final step of water removal.
The integration of a HESC system can offer producers significant savings in a typically sized production plant. Assuming a natural gas cost of $8/MMBtu ($7.60/GJ), the savings in power consumption is nearly $2,000,000 on an annual basis.
