Liquid / Gas Coalescer
For the Separation of Liquid and Aerosol from Gases
Compressed air is an essential power source that is widely used in chemical and petrochemical industries. This safe, powerful and reliable utility can be the most important part of your production process. However, your compressed air will contain water, dirt, wear particles, bacteria and even degraded lubricating oil which all mix together to form an unwanted abrasive sludge. This sludge, often acidic, rapidly wears pneumatic machinery, blocks valves and orifices causing high maintenance and costly air leaks.
It also corrodes piping systems and can bring your production process to an extremely expensive standstill!
All of these costly problems can be simply avoided by installing Everest Equipments high efficiency liquid/gas coalescer filters. The liquid/gas coalescers will remove the oil, water and dirt particles to eliminate the abrasive sludge in your compressed air.
|Three Physical Methods of Filtration |
Effective filtration takes place in three stages facilitated by the single fiber collection mechanisms explained below. Each mechanism is effective in eliminating certain contaminants at varying particle sizes collected on individual fibers in the filter media. These particles are captured and coalesce into larger droplets, migrating through the media to be drained away.
1. Direct Interception
Particles larger than the mean pore size of the filter media will simply impact directly onto the surface of the fiber matrix.
Everest Equipments utilises fine glass micro-fiber filter media with excellent retention ability.
2. Inertial Impaction
Inertial impaction occurs when small particles (usually less than 2 microns) penetrate beyond the surface of the filter media but cannot negotiate the torturous path within the media and are eventually captured by the fibers.
3. Diffusion (Brownian Motion)
It has been established that very small particles (less than 0.1 to 0.2 microns) move in a very random and erratic manner within the airstream. When particles are so small their motion is often violent and collisions with the fiber matrix are therefore increased.
Three Physical Methods of Filtration
Stage 1 : Prefiltration
Due to the fine pore structure of the coalescer medium, It is recommended that a prefilter be installed upstream of the coalescer assembly to properly control particulate matter in the liquid stream. Installing a prefilter significantly extends the life of the coalescer and reduces particulate concentration in the filter effluent to meet customer’s requirements.
Stage 2 : Coalescence
The hydrocarbon and water mixture enters the coalescing element and flows inside to outside. This is where small droplets of dispersed phase liquid come together, or coalesce, as the mixture moves through the depth of coalescer medium.
Stage 3: Separation
In separating water from fuel, water-free fuel and large water droplets flow toward the separator which is in the same vertical vessel. Flow is outside to inside. The separator medium is hydrophobic, which prevents water from entering the separator. Only water- free fuel flows through the separator. Water and fuel are removed by separate drain connections.
In separating oil from water, a settling zone is designed downstream of the coalescer. In the settling zone, the large coalescer droplets are separated due to gravity.
Alternative Filter Elements