Hydros manufactures equipment for the wet scrubbing of polluting acids present in the fumes coming from the production processes
The main acid gases, resulting from multiple industrial processes, are sulfur dioxide (SO2), hydrochloric acid (HCl) and hydrofluoric acid (HF) resulting from the processing of sulfur-based substances, chlorine and fluorine. For the removal of acid gases in the emissions hydros realizes plants with washing towers, commonly denominated Scrubber
This type of treatment is typically preceded by a primary dedusting to limit the load of incoming dust and for separating dust from combustion from those deriving from the abatement processes of acid gases, defining a different destination

The abatement process consists in washing the flue gases with a solution composed of water and a reagent (usually NaOH or H2SO4) that is continuously recirculated in the tower. The exchange ratio between the washing solution and the inlet flue gas together with the contact surface ensured by the filling bodies guarantees the reduction of pollutants still present in the fumes

We provide package solutions that, in function of various requirements, may be composed of:
- Smoke ventilation station
- Scrubber (scrubber)
- Flue gas heat exchangers for heat recovery
- Storage station and for dosing reagent
- Pumping station for the washing solution
- Piping, field instrumentation, monitoring equipment and process control
The purification process takes place in two phases.
The first phase, said presaturation, takes place in the lower part of the tower where, in consequence of the continuous recirculation, it has the achievement of the same adiabatic saturation temperature of the wash solution, continuously recycled, and the gaseous solution.
The second phase consists in the washing and absorption of pollutants that occurs on a contact bed consisting of filling bodies which have a specific surface area of ​​exchange sqm / mc high and such as to ensure an intimate contact between flue gas and the washing solution that is continually neutralized with the addition of the reagent is in solution