Scrubber Technology Jet scrubbers

Vertical or sloped standing tube with vertical gas inlet and propelling nozzles arranged concentrically in the tube above the side gas inlet.

Usually in combination with a laterally centrifugal separator.

Function

At the head of the jet scrubber a scrubbing fluid via special propelling nozzles is injected and finely dispersed to produce a maximum gas/liquid exchange surface and drops with high relative speed to gas flow. Due to the high energy input the jet scrubber is able to intake and deliver gases or fumes by itself. This injector effect allows cleaning of the exhaust gases without generating pressure loss on the gas side. Therefore, generally speaking, there is no requirement for a mechanical ventilator to draw off and convey the gas.

The quench effect at the same time ensures the cooling down of gases or vapors. Thereby the gas stream is cooled down to the respective cooling limit temperature by evaporation of water into the gas stream. Vapors can be cooled down and condensed by heat conduction.

Given the modified design, including a quench, gases of up to  1,300 °C can be cooled and scrubbed in one process.

Along the way through the jet tube the absorption of the pollutant component dissolves in the liquid. In the case of chemical absorption, the pollutant component is bound chemically.

Then, separation efficiencies are achievable up to 98% per washing stage.

Benefiting from the so-called inertial separation effect, solid particles or drops are separated  in the area of the motive nozzles by collision with quickly flying droplets of the liquid. In this way, particles with a diameter of ≥ 5 µm can be extracted almost completely.

Gas and liquid must be separated again at the end of the jet scrubber tube by a downstream centrifugal separator.

 

Special features:

  • scrubber function directly available (no idle time)
  • combination of particle separation and separation of pollutants in one unit
  • auto-suction, pressure loss-free
  • great load range, good response to partial load 
  • resistant to fouling, high level of operational reliability
  • low maintenance effort
  • wide range of applications, can be flexibly combined and expanded
  • available in nearly all materials

Range of applications:

  • power range up to 200,000 m³/h exhaust gas
  • quenching of hot exhaust gases
  • chemical absorption of large pollutant loads
  • particle separation
  • destroying large, suddenly occurring pollutant loads: especially well     suitable as emergency scrubber system