What task does an injector perform in a small steam generation plant________________?
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Answer: C. pump feed water
Explanation
An injector uses a high-velocity steam jet to create a low-pressure suction zone. This vacuum effect lifts water from a lower reservoir and forces it into the boiler. Kinetic energy converts into pressure energy, allowing water to overcome boiler pressure. Injectors operate on the Bernoulli principle without requiring mechanical pumps or motors. Steam passing through a convergent-divergent nozzle accelerates to high velocities. They are self-contained devices traditionally used on steam locomotives and small boilers.
Small steam plants rely on injectors as reliable backup feed water pumping devices. They eliminate the need for electricity or complex reciprocating pump linkages. Engineers value injectors for their simplicity and lack of moving mechanical parts. Furnace vacuums are maintained by induced draft fans rather than steam feed injectors. Turbine exhaust vacuums are created using large surface condensers and air ejectors. Chemical dosing and temperature control are handled by separate dedicated plant subsystems.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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