System Overview: The document describes a double weight hopper system designed for 100% gravimetric loss-in-weight feeding, specifically for coal feeding and pneumatic conveying to a burner.

Main Components:

• Weighed Hopper: Central to the system, it measures the weight of coal to ensure accurate feeding.
• Shut-Off Gate: Controls the flow of material from the hopper.
• Rotary Air-lock: Maintains air pressure while allowing material discharge.
• Flexible Sleeves: Used at multiple points to provide airtight connections and accommodate movement or vibration.
• Air Blower: Supplies air for pneumatic conveying.
• Extracting Valve (Soliflo): Facilitates controlled extraction of material.
• Loss in Weight Feeder: Continuously measures the weight loss to control feed rate.
• Air Equilibration Pipe: Ensures balanced air pressure within the system.

Functionality: The system automatically calibrates to maintain precise coal feeding rates by continuously monitoring weight loss in the hopper. Pneumatic conveying is achieved through the air blower and air-lock components, ensuring efficient transport of coal to the burner.

Key Features and Benefits:

• 100% gravimetric measurement ensures high accuracy.
• Automatic calibration reduces manual intervention and improves reliability.
• Use of flexible sleeves enhances system durability and airtightness.
• Designed specifically for coal feeding applications with pneumatic conveying.