low pressure zone that draws in and entrains a suction fluid and then recompresses the mixed fluids by converting velocity energy back into pressure energy. The motive fluid may be a liquid, steam or any other gas. The entrained suction fluid may be a gas, a liquid, a slurry.
The diagram below is a typical ejector. It consists of a motive fluid inlet nozzle and a converging-diverging outlet nozzle. Water, air, steam, or any other fluid at high pressure provides the motive force at the inlet
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So in this shutdown when we opened one of the ejectors, we made following observations. Typically in our complex most of the ejectors are used on main equipments for creating vacuum, thus they are normally steam ejectors pulling vacuum from reactor & finally condensing all the steam in downstream condensers.
So this picture shows some corrosion around the throat & nozzle however it seems to be within normal limits in steam service. The important part is that the tip of nozzle is not corroded and the location of nozzle in the downstream pipe is at required location so it seems to be working fine.