Vortex washer

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A vortex scrubber is an apparatus for the exchange of substances between flowing gases and liquids. They are used in particular to separate dust and gaseous pollutants from exhaust gases .

functionality

In a vortex scrubber, the flowing dust-containing gas is directed onto or over a scrubbing liquid surface. As a result of flow-influencing installations in the scrubber, part of the liquid is entrained and atomized into small drops. In this way, the vortex scrubber uses the kinetic energy of the gas to be cleaned. A mass transfer takes place at the phase interface between droplets and gas. In addition, centrifugal forces force particles into the water. A droplet separator at the exit of the gas line prevents scrubbing liquid from being discharged.

The flow velocities in the contact zone of eddy current scrubbers are usually between 8  m / s and 40 m / s. The pressure loss can be more than 1,500, depending on the water level in the scrubber  Pa amount, according to other sources even up to 2800 Pa. One advantage of the vortex washer is the lack of maintenance-intensive nozzles and moving parts. Disadvantages are possible foam formation and the sensitivity of the process to fluctuations in the volume flow.

Areas of application

Vortex scrubbers are often used in glassworks to simultaneously separate dust and harmful gases. They are intended for dedusting in waste incineration plants . In air conditioning applications, on the other hand, vortex scrubbers are used exclusively for gas separation.

Vortex scrubbers can also be used for oxidizing gas scrubbing .

literature

  • VDI 3679 Part 1: 2014-07 wet separator; Basics, waste gas cleaning of particulate matter (wet separators; Fundamentals, waste gas cleaning of particle collections). Beuth Verlag, Berlin. ( Summary and table of contents online )

Individual evidence

  1. ^ Günter Baumbach: Air pollution control . Springer-Verlag Berlin, Heidelberg, New York, 2nd edition 1992, ISBN 3-540-55078-X , p. 325.
  2. ^ A b Franz Joseph Dreyhaupt (editor): VDI-Lexikon Umwelttechnik. VDI-Verlag, Düsseldorf 1994, ISBN 3-18-400891-6 , pp. 1296-1297.
  3. ^ Matthias Stieß: Mechanische Verfahrenstechnik 2. Springer-Verlag Berlin, Heidelberg, New York 1994, ISBN 3-540-55852-7 , p. 35.
  4. ↑ Karl Georg Schmidt: Naßwaschgeräte from the perspective of the operating man. In: Dust: magazine for dust hygiene, dust technology, keeping the air clean, radioactive suspended matter . 24, No. 11, 1964, pp. 485-491.
  5. ↑ VDI 3679 sheet 1: 2014-07 wet separator; Basics, waste gas cleaning of particulate matter (wet separators; Fundamentals, waste gas cleaning of particle collections). Beuth Verlag, Berlin, p. 35.
  6. ↑ VDI 2578: 2017-05 emission reduction; Glassworks (emission control; glassworks). Beuth Verlag, Berlin. P. 59.
  7. ↑ VDI 3460 sheet 1 : 2014-02 emission reduction; Thermal waste treatment; Basics (Emission control; Thermal waste treatment; Fundamentals) . Beuth Verlag, Berlin. P. 97.
  8. ↑ VDI 3802 sheet 1: 2014-09 Air conditioning systems for manufacturing facilities (Air conditioning systems for factories). Beuth Verlag, Berlin. P. 81.
  9. ↑ VDI 3679 sheet 4: 2014-10 wet separator; Waste gas cleaning by oxidative gas scrubbing (wet separators). Beuth Verlag, Berlin, p. 9.