Inertial separator

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An inertial separator , inertial force separator or deflection separator is a device for separating particles, droplets or dust from flowing gases due to the force of inertia . Therefore it is one of the mass force separators . In contrast to the centrifugal separator , the flow is not set in rotation, but only deflected.

Working principle

Working principle of an inertial separator in the form of a pipe
elbow as a pre-separator

The operating principle of inertial separators is based on the fact that the particles suspended in the gas can no longer follow a changing flow movement due to their inertia . They are deposited on internals or walls or separated in enriched form in a partial flow. The deflection angles are usually less than or equal to 180 °.

Since the inertial forces are proportional to the particle mass , heavier and therefore usually larger particles are preferably deposited. Due to the inverse proportionality of the centrifugal force to the radii of curvature , the smallest possible radii of curvature are used.

Inertia separators are often built in such a way that gravity is used in addition to centrifugal force ( gravity separators ).

Possible uses

Inertia separators are often used for coarse dedusting during exhaust gas cleaning.

The inertia effect is often used to pre-separate a more efficient type of separator, e.g. B. an electrostatic precipitator.

Inertia separators are often used as droplet separators .

As a switchable foreign body separator, they can be used to protect engines , in particular military turboprop and stick turbocharged engines .


Individual evidence

  1. ^ Günter Baumbach: Air pollution control . Springer-Verlag Berlin, Heidelberg, New York, 2nd edition 1992, ISBN 3-540-55078-X , p. 315.
  2. VDI 2264: 2001-07 Commissioning, operation and maintenance of separator systems for the removal of gaseous and particulate substances from gas streams (Commissioning, operation and maintenance of separator systems for the removal of gaseous and particulate substances from gas streams). Beuth Verlag, Berlin, p. 27.
  3. VDI 3676: 1999-09 Inertial Separators. Beuth Verlag, Berlin. P. 12.
  4. a b Matthias Stieß: Mechanical Process Engineering 2 . Springer-Verlag Berlin, Heidelberg, New York, ISBN 3-540-55852-7 , p. 7.
  5. VDI 3679 Part 3: 2010-6 wet separator; Droplet eliminators (wet separators; mist eliminators). Beuth Verlag, Berlin. P. 11.
  6. ^ Willy JG Bräunling: aircraft engines. Basics, aero-thermodynamics, ideal and real cycle processes, thermal turbo machines, components, emissions and systems. 4th edition. Springer Vieweg, Berlin / Heidelberg 2014, ISBN 978-3-642-34538-8 , p. 179.