Scrubber Technology Cooling columns

Vertical tube with a gas inlet from underneath and a radial task of the scrubbing liquid from above over the whole tube cross section.

The gas and liquid flow through a counter-flow tube. Before the gas leaves the column at the upper end, entrained scrubbing liquid droplets are separated in an adequate droplet separator. In general, the column is combined with a container which contains or collects the scrubbing liquid. Occurring wastewater is conveyed by an overflow or a pump.

Function

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The vertical tube is equipped with installations inside which enable an intensive contact between the scrubbing liquid and the exhaust gas to be cooled. The choice of the installations depends on the composition of the exhaust gas.

The gas and cooling liquid are inserted into the counter-flow. The exhaust gas to be cooled enters at the lower end of  the column tube  and is lead to the upper end. At the top, the cooling liquid is distributed equally over the whole tube cross section and flows down again over the column installations  where they are collected in a container.

Due to the counter-flow, the temperature gradient between the exhaust gas and cooling liquid which is important for the cooling is used efficiently and the maximum cooling effect is reached.

The naming of the column type depends on the kind of column internals. There is a distinction between:

  • random packed columns
  • packed columns
  • plate columns
  • spray columns

Depending on the requirements each type of column can be combined with any GEA scrubber type.

 

Special characteristics

  • can be combined with all other types of gas scrubbers
  • low maintenance and low maintenance costs
  • use of cheaper materials possible
  • deliverable in all common materials
  • compact design
  • cleaning function is only available after a specific dead-time

Range of applications

  • Power range 100-150,000 m ³/h exhaust gas
  • Cooling of exhaust gas.