GEA Emission Control Technology GEA Quench Tower

Exhaust cleaning operation due GEA Quench Tower

Rapid cooling of quenching of gas streams is used in a number of essential applications in the process industries. The selection and sizing of spray nozzles are the most critical decisions in the system design. GEA quench tower design consists of an open vessel in which liquid is sprayed to contact the gas. The gas enters the bottom of the tower through a side nozzle and flows upwards, counter-current to liquid that has been sprayed from the top of the tower. By the time the gas has reached the top gas outlet, it has been cooled to its adiabatic saturation temperature.

Features

  • Brick lined casing with special bricks at dry-wet zone interface
  • Additional carbon bricks in case of high fluorine content
  • Open cross section design -> no risk of clogging. 
  • Long gas retention time -> separation of fine dust (As2O3, PbSO4, SE, SeO2)
  • Stand-by pump and ring main with nozzles
  • Emergency water system

 

Why Quenching?

Quenching is choosing in contrast to heat exchanger because:

  1. If an exchanger is used large area is required
  2. Also, direct contact is more efficient than indirect contact
  3. The fine particles from the reactor will also be removed which may otherwise erode exchanger tubes

Quenching is different from cooling in the sense that:

  1. Cooling is done in a comparatively longer time
  2. It also does not stop the side reactions completely
  3. While in quencher formation of by-products are completely stopped

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