Wound PPH Falling Film Absorber

• Graphite tubes housed in a PPH shell for falling film gas absorption
• Suitable for waste gases containing HCl, NH3, and SO3
• HCl absorption efficiency exceeds 99.9%
• Absorbed acid temperature is typically only 3–10°C above the cooling water temperature, usually eliminating the need for additional cooling
• Operating temperature range: -20°C to 120°C
• Modular stacked construction for convenient assembly and maintenance

Unlike packed absorption towers, the absorption process takes place inside graphite tubes. Raw gas enters from the top, while water or another suitable absorbent is distributed along the inner tube walls and flows downward as a thin liquid film. The gas and liquid move in countercurrent flow, allowing the target gases to be absorbed.
The Wound PPH Falling Film Absorber uses a PPH shell for chemical corrosion resistance, together with high-purity, impermeable graphite tubes treated by impregnation. These materials are suitable for handling strongly corrosive media, including hydrochloric acid and hydrofluoric acid, subject to the specific operating conditions and material compatibility.
For HCl gas, the absorption efficiency can exceed 99.9%. The absorbed acid temperature is generally only 3–10°C above the cooling water temperature, so additional cooling is usually unnecessary. The equipment operates within a temperature range of -20°C to 120°C and offers good thermal shock resistance.
The system has low pressure drop and allows smooth gas flow. Its modular stacked construction also simplifies assembly and maintenance. Typical applications include waste gas treatment in chemical plants, particularly for gas streams containing HCl, NH3, and SO3. Suitability for each gas depends on its concentration, operating conditions, and the selected absorbent.

The company has experience in supplying absorption equipment for acidic waste gas treatment in chemical plants. Each Wound PPH Falling Film Absorber is configured according to the actual process requirements.
Before production, the waste gas composition and flow rate are confirmed, followed by the absorbent type and concentration. Graphite tube specifications, spray arrangement, and PPH material requirements are then determined. Material inspection, forming, assembly, testing, and commissioning are carried out according to the agreed specifications.

Please provide the waste gas composition, gas flow rate, absorbent type, and absorbent concentration when making an inquiry. These details help determine the appropriate equipment configuration. Drawings or prototypes can also be provided for reference.