Falling Film Absorber

A falling film absorber is a device that forms a thin film of liquid phase on a vertical surface, allowing gas to contact the liquid and absorb components from the gas phase. Gas is fed through a spray plate or pipe at the bottom of the tower, causing the gas flow to contact the vertical wall and form a uniform film. Volatile substances in the gas are absorbed by the liquid during this contact process and separated.

Working Principle

Based on mass transfer and substance absorption between the gas and liquid phases, the main steps include:
Gas-Liquid Contact: Gas is introduced into the absorber, forming a thin film through the spray plate or pipe. The gas phase contacts the liquid phase on the film surface, initiating the mass transfer process.
Substance Absorption: Volatile components in the gas phase are absorbed by the liquid phase during the contact process and gradually separate as the film descends, completing gas-liquid separation.
Mass Transfer Efficiency: The falling film absorber achieves optimal mass transfer efficiency and improves absorption by adjusting parameters such as the gas inlet velocity, liquid flow rate, and temperature.

Product Structure

1. Absorption Tower The absorption tower is the main body of the entire device, containing packing or spray plates to form a uniform thin film of liquid phase.
2. Liquid Phase Circulation System: The liquid phase is injected into the top of the absorber through the circulation system, forming a thin film that circulates within the tower, absorbing gas components.
3. Gas Phase Inlet: The gas phase enters the absorber through the inlet, passes through the thin film liquid phase, and is discharged at the top as absorbed components.
4. Control System: The control system includes monitoring sensors, valves, and regulating devices for real-time monitoring and adjustment of the absorber's operating parameters, ensuring stable operation.

Application Areas

Gas Purification

Used to remove harmful gases or odorous substances from waste gases, protecting the environment and human health.

Solvent Recovery

Used to recover useful solvents or substances dissolved in waste gases during production, improving resource utilization.

Gas-Liquid Reaction

Used for chemical reactions at the gas-liquid interface, promoting the transfer and transformation of reactants.

Drying

Used to remove moisture and humidity from gases, improving product quality and stability.

Desulfurization

Used to remove harmful gases such as sulfur dioxide produced by fuel combustion, reducing air pollution.

Extraction

Used to extract desired components from gases, such as methane from natural gas.

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