Wherever gas streams get in contact with liquid, droplet or aerosols are carried away with the stream as entertainment.
During chemical reactions and in absorption or distillation columns droplets can get into the gas phase as well.
To efficiently remove these droplets, either to clean the gas or to recover the liquid, different technologies may be used.
Depending on the aerosols and on the desired efficiency and removal rate we offer custom made solutions.
To remove liquid droplets together with possible solid particles from gas streams vane type mist eliminators are widely used in industry.
They are usually made of many parallel stainless steel baffles with one or several sharp turn. They have good removal rates for droplets of 10 µm or larger and combine high gas throughput with a very low pressure drop. For droplets of smaller size than 10 µm they may still be used with good removal rates, if the gas velocity is chosen higher and if the resulting higher pressure drop is acceptable.
They are also preferred when very low maintenance is required.
Unlike filters, these vane type mist eliminators remove the liquid and solid aerosols and let them flow down. Therefore these mist eliminators may operate for years without cleaning or substitution.
Mesh pads are made from thin stainless steel wire which is knitted into a thick mesh (hence the name).
For special applications corrosion resistant plastic wire or alloy wires may be used.
They are often used in evaporators and in separation columns as well as in cooling units, condensers and scrubbers. They keep the liquid inside and avoid damage caused by these droplets in the next process unit downstream.
Typical mesh pad thicknesses are 150 mm or 200 mm, but multiple of these sizes are also used for higher removal efficiency.
Aerosols as small as 2-5 µm may be removed with these units.
For even smaller droplets and fine mist our special fiber mist eliminator elements should be used.
ALINO-IS fiberbed mist eliminator equipment for highest quality requirements at the removal of mists and aerosols.
The mist eliminator elements are commonly called candles. They represent a droplet removal technology with one of the highest achievable droplet removal rates.
Their fiberbed is made of special glass fiber or carbon fiber or polypropylene fiber, to name just the most common materials. They use Brownian Motion of the molecules to achieve outstanding separation rates even for aerosols smaller than 1 µm.
Their common separation efficiency is ~99.9% of all droplets > 3 µm and ~99.5 % of all droplets < 3 µm.
Catching the submicron particles due to Brownian motion is independent of gas velocity. Therefore these candles have an excellent efficiency in that particle range also while the plant is operating in partial load.