Metso Full portfolio High Efficiency Scrubber
 High Efficiency Scrubber

High Efficiency Scrubber

Excellent scrubbing efficiency even under fluctuating gas volume flows

The Metso High Efficiency Scrubber is an efficient and flexible solution for wet scrubbing particularly of corrosive gases with a high dust load in processes with varying gas volumes. The solution is constructed from highly durable materials to ensure a long lifespan and is available in a variety of configurations to meet different process requirements and plant layout arrangements.
Benefits
  • High, consistent scrubbing efficiency at varying gas volumes and dust loads
  • Highly efficient impurities removal even at very low gas volume flow rate
  • Improved environmental performance
  • Easy maintenance and low lifecycle costs thanks to removable scrubbing zone
  • Durable construction materials can withstand highly corrosive gases with high dust load
  • Flexible solution can be configured and optimized to meet different process requirements and plant layout arrangements
High efficiency scrubber
High Efficiency Scrubber
High Efficiency Scrubber

High scrubbing efficiency

The Metso High Efficiency Scrubber is equipped with a deflector plate, which forms a circular gap through which gas and scrubbing liquid flow, generating the pressure drop required for the removal of impurities. The size of the gap is automatically adjusted in order to maintain the pressure drop, thereby ensuring consistent, highly efficient performance at varying gas volumes. A downstream droplet separator removes entrained scrubbing liquid droplets from the gas.

Improved environmental performance

The main function of the Metso High Efficiency Scrubber is particle removal. Scrubbing liquid is injected through spray nozzles into the gas, which is accelerated afterwards in the circular gap to produce a turbulent flow regime. The particles are captured by the scrubbing liquid droplets and thus removed from the gas because of the high relative velocities between particles and droplets.

The turbulent mixing of gas and droplets in the circular gap at high gas velocities produces a large mass transfer area. Mass transfer between gas and liquid is also increased due to the turbulence, meaning that gaseous impurities are removed from the gas along with particles.

The Metso High Efficiency Scrubber Optimizer can be utilized to automatically adjust pressure drop of the scrubber to process conditions, thereby enabling energy savings while still meeting the performance targets of the plant. 

Easy maintenance and low lifecycle costs

The scrubbing zone can be fully or partially removed and exchanged, making maintenance easier and less costly and extending the lifespan of the solution.

Flexible solution for different processes and plant arrangements

The Metso High Efficiency Scrubber is delivered as a standalone tower with an integrated pump tank and attached platforms. The integrated pump tank and attached platforms minimize the footprint and eliminate the need for additional steel structures and platforms.
An OtoVent™ quench section can be installed directly on top of the scrubber to combine two processes in one equipment. This minimizes the gas cleaning plant’s overall footprint or enables easier integration into an existing plant.

Durable construction materials

The Metso High Efficiency Scrubber is constructed of fiber-reinforced plastic that is resistant to most chemicals. Areas sensitive to particle erosion are protected by an extra protection layer. This makes the scrubber suitable for processes using corrosive gases with high dust load. The solution can also be constructed using high alloy steel.

Typical applications

  • Non-ferrous and ferrous metallurgical process off-gas treatment
  • Oil and gas industry
  • Chemical industry (calcination, pigment production etc.)
A large turn-down of 10–100% is possible because the deflector plate can almost fully close the ring gap. This allows highly efficient removal even at very small gas volume flow rates.

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