Ejectors/Eductors

Ejectors/Eductors

The words “Ejector”and “Eductor” are both used for this technology, they are synonymous.

The D. R. Technology Ejector/Scrubber has the unique advantage of providing good gas/liquid contact with the ability to motivate gas flow.This means that in many applications this design can be used without a motivating fan or blower.

The Ejector is an aerodynamic shape which introduces gas and liquid in a co-current fashion.  The Ejector design employs a convergent section, a narrow “throat” section, a divergent or recovery section, inlet and outlet connections.

Typically, liquid is introduced at 20 to 100 PSIG above gas pressure at liquid to gas ratios of 0.0003 to 0.003 volume to volume.  As the liquid pressure and volume ratio increase, more gas flow can be motivated at higher pressure rises.

Besides having the ability of motivating gas flow, the design affords contact both for absorption and particulate removal.  Ejectors are capable of absorbing 90 plus percent of vapors such as acid gases, ammonia, amines, and a soluble VOC’s.  The design can also be used to capture solids from a gas.  Particles as small as 1 micron can be removed with this design.2

As with all scrubbers and absorbers, this design must be used with a mist eliminator to separate entrained scrubbing liquid droplets, or its efficiency will be compromised.

D. R. Technology offers complete systems designed around this technology.

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