PPH Spiral Extrusion Winding Integrated Moulded Spray Tower Wet Scrubber System

PPH Spray Tower

The PPH spray tower uses a spiral extrusion winding integrated forming process. 

A PPH spray tower (Polypropylene Homopolymer spray tower) is a high-performance wet scrubber made of PPH, a modified homopolymer polypropylene with superior heat and corrosion resistance. It is widely used for acid/alkali exhaust gas purification, dust removal, and mist elimination in chemical, plating, electronics, and pharmaceutical industries.

1. Material: PPH (Polypropylene Homopolymer)

High corrosion resistance: Resists strong acids (HCl, H₂SO₄, HF), alkalis (NH₃, NaOH), and most organic solvents; ideal for pH 1–14 environments.

Excellent heat resistance: Continuous service temperature 80–90°C, short-term up to 100–110°C; much higher than PP (60°C) or PVC.

Long lifespan: UV-stabilized, anti-aging; service life 15+ years (3–5× longer than steel).

Lightweight: 1/8 the weight of steel; easy to install and reduces structural load.

2. Structure (Same as standard spray towers, PPH construction)

Tower body: Cylindrical, integrally wound/butt-welded PPH, no leakage.

Spray system: PPH nozzles, pipes, circulation pump; fine mist (100–120 μm) for full coverage.

Packing layer: Polypropylene Pall rings; large surface area for gas–liquid contact.

Mist eliminator: Removes entrained droplets to prevent carry-over.

Circulation tank: PPH, collects and recycles scrubbing liquid.

3. Working Principle

Gas inlet: Dirty gas enters from the bottom side.

Countercurrent contact: Gas flows upward; scrubbing liquid (water/chemicals) sprays downward.

Pollutant removal: Acidic/alkaline gases are absorbed/neutralized; dust is captured by droplets.

Mist removal & discharge: Clean gas passes through the mist eliminator and exits at the top.

Liquid circulation: Contaminated liquid returns to the tank for treatment/reuse.

4. Key Advantages

High efficiency: 95–98% removal for acid gases and fine dust.

No clogging: Open design; smooth PPH surface resists scaling.

Low O&M cost: No moving parts; easy maintenance; low pressure drop.

Safe & durable: Leak-proof, UV-resistant, long-term stability.

5. Main Applications

Acid/alkali exhaust (chemical, plating, battery)

High-temperature flue gas (80–100°C)

Dust & mist removal (pharmaceuticals, food processing)

Waste gas with organic solvents

6. PPH vs. PP/PVC/FRP

Core Advantages of PPH Spray Tower

I. Material Performance Advantages

Excellent Corrosion Resistance: Made of PPH homopolymer polypropylene, it resists strong acids, strong alkalis, salt spray and various organic solvents. It adapts to long-term working conditions of acid-base waste gas with no corrosion and no leakage.

Superior High Temperature Resistance: The long-term operating temperature reaches 80～90℃, and the short-term temperature resistance is up to 110℃. It is far better than ordinary PP and PVC spray towers and capable of treating high-temperature waste gas.

Stable & Anti-Aging Material: Integrally wound and welded with high toughness, anti-aging and anti-ultraviolet properties, its service life is much longer than that of ordinary plastic towers.

II. Structural and Process Advantages

Integrated seamless welding: Integral forming with fewer welds, excellent airtightness, no leakage and air infiltration, enabling more compliant waste gas treatment.

Smooth inner wall for anti-clogging performance: With a smooth surface, it suffers less scaling and impurity adhesion, ensures smooth spraying, and extends the maintenance cycle.

III. Advantages in Usage Cost and Safety

Light Weight & Easy Installation: It features light weight, requiring no complex load-bearing infrastructure. It enables rapid installation and reduces transportation costs.

Low Operating Energy Consumption: With low wind resistance and pressure loss, fans and water pumps consume less power, resulting in low operating costs.

Safe, Durable & Cost-Effective: It boasts excellent flame retardancy, resistance to aging and cracking, with a service life of over 15 years and low comprehensive operation and maintenance costs.

Ⅳ. Advantages in Usage Scenarios 

Wide Applicability: Can be adapted for purifying various acid and alkali exhaust gases, dust, and oil fumes in chemical, electroplating, pickling, pharmaceutical, and laboratory environments.