Demister pad

Wire Mesh Demister Pad (also known as Mist Eliminator, Mesh Demister, or Entrained Mist Separator) is engineered to achieve 99.8% mist removal efficiency in gas-liquid separation systems. Designed for vertical cylindrical equipment such as distillation columns, scrubbers, and packed towers, it ensures optimal mass transfer efficiency while minimizing pressure drop. Widely applied in chemical, petrochemical, pharmaceutical, and environmental industries, this solution effectively removes oil mists, toxic gases, and acid droplets in desulfurization processesDemister pad is commonly placed at the top of the packing tower, which can not only ensure the mass transfer efficiency, but also reduce the board spacing. Demister pad is widely used in chemical, petroleum, pharmaceutical, light industry, metallurgy and other industrial production in the vertical cylindrical equipment vapor-liquid separation device. It can also be used in the desulfurization and other productions to remove oil mist, toxic and poisonous gas.

Working principle of demister pad

When the gas with mist rises at a constant speed and passes through the wire mesh, the rising mist will collided with the mesh filament and attached to the surface filament due to the inertia effect. The mist will be diffuse on the filament surface and the droplet will follow along the filaments of the two wire intersection. The droplet will grow bigger and isolate from the filament until the droplets gravity exceeding gas rising force and liquid surface tension force while there is little gas passing through the demister pad.

Separate the gas in the droplets can improve the operating condition, optimize process indicators, reduce corrosion of the equipment, extend equipment life, increase the amount of processing and recovery of valuable materials, protect the environment, and decrease air pollution.

Technical Specifications & Features

Key Parameters

• Materials: 304/316L stainless steel, Titanium, Monel, Duplex Steel (2205), Hastelloy

• Thickness: 50–150 mm (customizable ±5%)

• Surface Density: 140–280 kg/m³ (adjustable for flow rates)

• Operating Range: -50°C to 480°C

• Pressure Drop: ≤120 Pa (vs. 200–500 Pa in conventional models)1

Core Advantages

✅ Multi-Layer Structure: Combines surface filtration, depth separation, and reinforced support grids for graded mist elimination.✅ Customization: Four mesh types (Standard, High-Efficiency, High-Permeability, Shock Absorber) tailored to flow dynamics1.✅ Global Compliance: Meets HG/T 21618-1998, HG5-1404-81, and ASTM A480 standards for corrosion resistance18.✅ Rapid Deployment: 72-hour CAD design + 2-week production for urgent replacements.✅ Proven Performance: Trusted by Shell, Sinopec, and Siemens Energy in 120+ projects1.

Working Principle

When gas-entrained mist flows through the wire mesh, droplets collide with filaments due to inertial forces. These droplets coalesce on the mesh surface, grow in size, and eventually fall under gravity, achieving gas-liquid separation. This process reduces equipment corrosion, extends service life, and enhances environmental compliance by minimizing emissions16.

Industry Applications

• Petrochemical: Acid mist capture in sulfur recovery units (SRUs), natural gas dehydration6.

• Power Generation: Flue gas desulfurization (FGD), turbine inlet air filtration6.

• Environmental Engineering: VOC recovery, wastewater treatment exhaust systems.

• Renewable Energy: Biogas purification, hydrogen production gas scrubbing210.

Maintenance & Longevity

• Self-Cleaning Design: High porosity minimizes clogging; periodic rinsing with water or mild solvents suffices7.

• Durability: Resists acid/alkali corrosion, ensuring >20 years of service under harsh conditions1.

Features of demister pad

• Simple structure.
• Lightweight and easy to transport.
• High porosity, less pressure drops.
• Large surface area and high separating efficiency.
• Easy to install, operate and maintain.
• Durable and long service life.
• Corrosion and rust resistance.