The wet scrubber (washer) is located after the postcombustion. The flow of smoke is led to the washer by the Ventury effect. The washer consists of a water injection ramp + reagent (liquid lime), a cyclonic bell and a pool (tank provided for this purpose). The dust resulting from incineration which is already oxidized in the post-combustion is then sent to the wet scrubber. The fumes are sprayed with a «water + reagent» mixture which weighs down the dust and which, by gravity, carries it into the pool. The contaminated water is then analyzed and neutralized to reach a neutral PH of 7. To do this, a dosing pump and a PH analyzer with a probe are directly immersed in the pool. The water + reagent mixture circulates in an open or closed loop. The chimney is located directly above the washer to expel the flow of clean air. For some cases, it is possible to install a double washer, meaning, two washers in series.
Benefits :
Cost optimized
Colourless and odourless fume
It complies with CE standards in most cases but not certified in continuous for all types of waste
Disadvantages :
Very little dust / pollutants remaining
Fumes rejected at 200°C