Fiberglass Flushing Tower

A fiberglass-reinforced plastic (FRP) scrubbing tower is an environmental protection device that utilizes a liquid (usually water or a chemical absorbent) to contact polluted exhaust gases, thereby removing pollutants (such as dust, acidic gases, alkaline gases, and organic waste gases).

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Working Principle Why Choose FRP for Flushing Towers? Types and Applications

Its core working principle is: gas-liquid mass transfer.

Exhaust Gas Inlet: Exhaust gas containing pollutants enters the tower from the lower portion.

Reverse Contact: Exhaust gas flows upward while absorbent liquid is sprayed downward through a spray system at the top of the tower.

Mass Transfer Process: Exhaust gas and absorbent liquid come into full, turbulent contact within the packing layer. Pollutants (such as SO₂, HClNH₃, etc.) diffuse from the gas phase into the liquid phase, where they are absorbed or chemically react.

Gas-Liquid Separation: The purified gas continues to rise, passes through a demister to remove entrained liquid droplets, and is then discharged from the top of the tower.

Liquid Recirculation/Discharge: The liquid that has absorbed pollutants descends to the bottom of the tower, where some is recycled and some is discharged as wastewater for treatment.

This is precisely the advantage of FRP

Excellent Corrosion Resistance (The Most Critical Advantage)

Industrial waste gas often contains highly corrosive components such as acids, alkalis, and salts (such as sulfuric acid mist, hydrogen chloride, and hydrogen fluoride). FRP, especially when made with vinyl ester or epoxy resin, is highly resistant to these media, with a lifespan far exceeding that of carbon steel (even carbon steel with an internal anti-corrosion coating is susceptible to damage).

Lightweight and High Strength

Lightweight makes it easy to transport and install, making it particularly suitable for installation on rooftops. Its high strength provides excellent structural stability.

Monolithic Molding with No Welds

This eliminates the risk of weld cracking, as is common with plastic products, and also prevents electrochemical corrosion at metal welds.

Smooth Interior

Low fluid resistance and resistance to fouling, reducing clogging and the need for cleaning and maintenance.

Flexible Design

Tower size, number of spray stages, and filler type can be flexibly designed based on parameters such as the air volume being processed and the type of pollutants.

Types and Applications

Based on the nature of the waste gas being treated, scrubbing towers are primarily categorized as follows:

Type	Acid mist purification tower	Alkali mist purification tower	Organic waste gas scrubber	Dust removal and cooling tower
Processing objects	HCl, H₂SO₄, HNO₃, HF, etc.	NH₃, NaOH mist, etc.	Dust-containing and soluble organic waste gas	High-temperature flue gas, dust
Absorption liquid	NaOH solution, Na₂CO₃ solution	Dilute acid solution (e.g., sulfuric acid)	Water, or specific chemical solvents	Water
Working principle	Acid-base neutralization	Acid-base neutralization	Physical absorption, dissolution	Cooling, humidification, dust removal
Application Industries	Chemical, Electroplating, Pickling, Semiconductor	Fertilizer, Petrochemical, Wastewater Treatment	Spraying, Printing, Food Processing	Boiler Flue Gas

Summary:

Fiberglass-reinforced plastic (FRP) scrubbing towers are one of the most economical and effective technologies for treating industrial acidic/alkaline waste gases and water-soluble pollutants. Leveraging the corrosion resistance of FRP, they purify waste gases through mass transfer within the packing layer and the chemical action of the spray liquid. When selecting a system, it's crucial to clearly define the waste gas composition, concentration, temperature, and volume for precise design and selection, ensuring compliance with emission standards.

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