PPH winding spray tower

The PPH spiral wound spray tower is a common wet-type waste gas treatment equipment. Its core operating principle is as follows:

I. Working Process
1. Waste Gas Intake: Acidic (alkaline) waste gas is introduced into the tower base via a fan through an air duct.
2. Gas-Liquid Countercurrent Contact: The waste gas flows upward through the packing layer, where it comes into contact with the absorbent (such as alkali or acid) sprayed from the top of the tower.
3. Absorption and Neutralization: Harmful components in the waste gas (such as HCl, NH₃, SO₂, etc.) undergo physical absorption or chemical reactions with the absorbent, removing them or converting them into harmless substances.
4. Demisting and Dehydration: The purified gas passes through a demisting layer (such as a wire mesh demister or baffle) at the top of the tower to remove moisture before being discharged into the atmosphere by a fan.
5. Liquid Circulation: The absorbent collects in a circulating liquid pool at the bottom of the tower. It is pressurized by a water pump and then sprayed again from the top of the tower, circulating for use until the active ingredients are depleted and replaced.

II. Structural Components
- Tower Body: Made of PPH (modified polypropylene) material, this one-piece, weld-free, corrosion-resistant tower is suitable for acidic and alkaline environments.
- Packing Layer: PP ball rings and Raschig rings are commonly used to increase surface area, extend gas-liquid contact time, and improve purification efficiency.
- Spraying System: Consisting of nozzles, pipes, and a water pump, the nozzles evenly spray the absorbent liquid, forming a liquid film covering the packing surface.
- Demisting Layer: Prevents water carryover and ensures dry outlet gas.

III. Technical Features
- High Purification Efficiency: Over 95% can be achieved.
- Corrosion Resistance and Lightweight: PPH material is acid- and alkali-resistant, age-resistant, and suitable for harsh operating conditions.
- Low Operating Resistance: Windage is generally between 200 and 600 Pa, resulting in excellent energy savings.
- Easy Maintenance: Simple structure, easy operation, and a compact footprint.

IV. Scope of Application: Suitable for purifying various acidic and alkaline waste gases such as sulfuric acid mist, hydrogen chloride, and ammonia in industries such as chemical, electroplating, laboratory, and metallurgy.