Highly efficient Demister Mist eliminators

High collection efficiency and low pressure drop

The Demister mist eliminator is an assembly of woven wire mesh that is supported with the high open area grids.

Demister mist eliminators are constructed in any size and shape using the various materials such as special alloys, stainless steel, carbon steel and more.  The stainless steel and special alloys are completely annealed to offer the highest corrosion resistance.

On the base of experience in the actual plant performance, our engineers use the special family of mesh styles for the specific equipment and processes to meet the customer needs.

Working of Mist eliminator

1. A vapor steam containing entrained liquid drops passes through a demister pad. The vapors move freely across the mesh.

2. The inertia of the drops drives them to contact the wire surfaces and unite.

3. Big sized united drops produced in the mesh eventually quit and drop to the vessel bottom.

Properties of demister mist eliminator

1. Easy installation in the whole process equipments

2. Highly cost effective solution when apparatus sizes are set by other needs

3. High efficiency with nominal pressure fall.

4. Immediate delivery available.

Design parameters

For the common design, the following equation has been used as a velocity guideline from the several years.

V=K[(pL-pV)/pV]1/2

V refers todesign velocity, pL refers to liquid density, pV refersto vapor density, K provides capacity factor.

The preferred design value of K changes on the base of various system factors including liquid viscosity, surface tension, entrainment loading and the amount of dissolved and suspended solids. The preferred values of K are also significantly based on the mesh structure and vessel configuration.

From the several years, the traditional mist eliminator designs have been prepared that became the popular standards inthe world of chemical process industries. The industry followed a standard guideline, K=0.35 ft/sec [0.107 m/sec] for calculations based on the traditional methods. Enhanced high capacity styles have been developed that are also followed even today.

Outstanding functionality is generally received from 30 to 110% of the assessed design. Operation pressure drop is often nominal, <1 inch wc. For the high vacuum operations, the high functionality is routinely obtained with dP of 0.1 in. [2to 3 mm] wc.

High capacity demister mist eliminators

We have developed a new family of demister mist eliminators that replace the old mesh styles.

The latest high capacity style gets benefits of enhanced knowledge about the way internal wire geometry influences capacity and functionality in same manner that the structured packing surpassed random packing functionality in the distillation columns.

As compare to the older styles, the industrial demister styles can deliver:

1. 20% or higher design capacity

2.  Low pressure drop

3.  Higher efficiency at design velocity

4.  Equal or enhanced corrosion and fouling resistance

High capacity Capacity gain Efficiency gain Description
215 >35% same Glass fiber and metal for highest efficiency
194 >25% same Ultra efficiency design for fine particles
709 >20% same Industrial, high efficiency design
172 >20% same General purpose style
708 >22% same High open area for viscous or dirty liquid
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