Lectrodryer - Model BAC-50 -Automatic Continuous Hydrogen Dryer

The BAC-50 Lectrodryer is an automatic dual tower unit for the continuous drying of hydrogen gas used in cooling turbine generators. The BAC-50 is used worldwide and can meet all known specifications including ASME, PED/ATEX and lECEx with certified components (lECEx certified assembly available as an option upon request). The BAC-50 is heat reactivated with high efficiency embedded electric heaters, and overtemperature protection. It can operate from seven standard voltages, and has NEMA 4 purged electrical enclosures to meet Hazardous Area Classification C11, Div 2, Gr B or II3G, IIC, T4 for Zone 2.

The BAC-50 allows the continuous monitoring of the volume of water removed from the generator. The BAC-50 Lectrodryer generates an adsorption flow and a reactivation flow simultaneously. Flow can be continued through the generator and dryer even though the turbine may be on turning gear.

The BAC-50 Lectrodryer features ASME or PED carbon steel pressure vessels with embedded electric heater and flow booster in each adsorber vessel, initial charge of desiccant, two interlocked 4-way non-lubricated plug valves with double acting actuator, solenoid valve controls, 110 volt controls with control transformer, PLC, heater contactors, on-off switch, and a touch-screen operator interface for information on dryer status, sequence activity, alarms and maintenance information.

Humidity Presence is Inevitable in Hydrogen Cooled Generators: Enhance Purity and Hydrogen Safety with Lectrodryer BAC-50 Hydrogen Dryer

Improve Generator Protection
Moisture attacks the generator by: Damaging the generator insulation, creating hotspots, rapidly propagating stress corrosion cracking in retaining rings and reducing hydrogen purity and generator cooling.

Increase Hydrogen Purity
Humidity is not tracked by hydrogen purity analyzers and it decreases your hydrogen purity. Know your true hydrogen purity by having an accurate dewpoint while drying and protecting your generator.

Hydrogen Safety
No additional hydrogen handling since no hydrogen venting or purging is necessary for reactivation. Hydrogen is boosted by internal blower avoiding the need of a positive displacement blower.

Engineered for Upset Conditions
Protected dewpoint sampling cell to avoid contamination and provide an accurate dewpoint. The system is designed to discharge liquid water and oil that may drain through hydrogen piping. Desiccant used has the highest humidity adsorption rate for the application and system is oversized to remove excess humidity fast.

Easily Pays for Itself
Increase Heat Rate efficiency thanks to a higher cooling capability and reduced windage losses caused by moisture presence. No operator involvement required for regeneration. Hydrogen replacement and handling to maintain purity is significantly reduced, promoting safety and ongoing savings. The prevention of just one moisture caused outage will more than pay for the cost of the BAC-50.

• Inlet Dewpoint with 4-20 mA output and dual alarms
• Absolutely NO Hydrogen purging or venting
• Fully Automatic - No manual regeneration
• Integral Blowers - Maintain flow even during turning gear
• System per ASME B31.12 - for Hydrogen containing piping
• Closed Circuit Reactivation - with welded piping and stainless steel tubing
• Internal Heaters - Low watt density and efficient even heat distribution
• Flexible Data Logging - Analyze trends through Ethernet or SD Card
• Dual Tower Desiccant Beds - oversized for upset conditions, provide continuous drying
• Non-Lubricated Valves - no maintenance
• Electrical Enclosures - meet area requirements with a full PLC and touchscreen operator interface
• Protective Cage Enclosure - prevents tampering, protects operating personnel
• Over-Temperature Protection - extends heater life
• Approximate Weight: 1,800 pounds / 816 kgs
• Dimensions: 43"W x 36"D x 78"H / 110cms x 92cms x 199cms

• Outlet Dewpoint Monitor
• Oil vapor pre-filter prevents contamination of desiccant
• Water Discharge Monitoring measures the water that is being removed from the generator
• Custom DCS communication available