Key Features
- High absorption efficiency
- Low pressure drop
- Glass construction
- Modular design
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Falling Film Absorber
Falling Film Absorber
Falling Film Absorber
Falling film absorber for gas absorption applications.
Falling Film Absorber Overview
The Falling Film Absorber is a glass-based absorption module where the gas to be absorbed and the absorbing liquid flow co-currently downward along glass tubes. Gas enters at the bottom and rises through the annular film while liquid flows downwards, allowing intimate contact and absorption. It essentially functions like a shell-and-tube unit but with the absorber liquid maintaining a thin film on the tube walls. This ensures high mass transfer efficiency with low liquid holdup and is suitable for corrosive gas absorption in glass-compatible processes.
Specifications
• Design: tube bundles arranged vertically; liquid flows as thin film on inner surfaces
• Materials: borosilicate glass tubes, PTFE or inert distributors, support steel structures
• Operating mode: co-current downward gas and liquid flows
• Pressure: near ambient to slight positive
• Temperature: ambient to moderate (depending on gas and absorbent)
• Liquid rate: optimized to avoid flooding or dry break
• Gas throughput: matched per tube bundle
• Efficiency: high absorption performance due to large interfacial area
• Utilities: recirculation pump, coolant, gas feed, venting and mist elimination
• Custom sizes: multi-tube arrays for higher capacities, modular expansion
Applicationss
• Absorption of gaseous species such as HCl, SO₂, NOₓ, Cl₂
• Scrubbing of waste gases in laboratory, pilot, or small industrial setups
• Gas treatment and purification in chemical or environmental systems
• Integration into technical glass packages as absorber columns
• Process development or pilot validation of absorption kinetics
Because of the falling film design, the absorber offers efficient gas-liquid contact with minimal pressure drop and manageable water requirements.