Many production, transformation and packaging processes generate : toxic gases, droplets of all sizes, corrosive, toxic and plugging dusts.

production, storage and packaging of basic chemical compounds

fluidized beds, dryers and coolers used in the production of fertilizers, sugars, lucern and urea

degassing of reactors in fine chemistry and pharmacy

burning liquids in the chemical an pharmaceutical industry
metallurgy and iron and steel industries
treatment of SO₂
lime kilns, paper waste
degreasing and chroming baths, preparation and metallizing surfaces

For all these applications WATERLEAU France analyses the operating parameters and recommends the proper processes while fulfilling all legal obligations.

ESOLAV

ESOLAV processes using vertical and horizontal scrubbers & absorption of chemical pollutants like :

bases : NaOH, NaClO₃, ...

acids : HCl, HF, HCN, ...

sulfur-derivatives : SO₂, SO₃, H₂S, ...

nitrogen-derivatives : NH₃, NO₂, RNH₂, ...

toxic gases : Cl₂, BF₃, ...

VOC's : ethylenoxide, alcohols, ...

ESOSEP

ESOSEP processes for collecting droplets (e.g. H₂CrO₄, H₂SO₄, HNO₃) with a diameter up to 0,3 µm.

WATERLEAU France has standardized its ESOLAV and ESOSEP units in order to treat flows from 1.000 to 200.000 m³/h. These units can be made in different types of material (PVC, PPH, PVDF, SVR, Inox, ...) according to the requested fabrication quality. This standardization allows WATERLEAU France to propose the solution best adapted to the cleint's requirements.

DYNAWAVE^® scrubber

Air pollution regulations are requiring refineries, cement and lime kilns, power plants and chemical manufacturers to remove acid gases, such as CO₂ and particulates from flue gas before releasing it to the atmosphere.

Our DYNAWAVE^® scrubber is the perfect solution for particulate removal, hot gas quenching and acid gas absorption such as SO₂, HCl and HF.

How do wet gas scrubbers work ?

Nearly all wet gas scrubbers work in the same way:

Unsaturated flue gas from the customer's process must be saturated before acid gases such as SO₂ can be removed. This is done by a scrubbing agent or water.

After gas saturation acid gas and SO₂ can be removed. This is accomplished in 2 steps :

   1. the acid gases are absorbed into the
      scrubbing liquid
   2. the acid gases react with the reagent,
       forming reaction by-products, which must be
       removed from the clean gas

All scrubbers must have a method for removing the water droplets from the gas before they leave the scrubber

In many conventional scrubbers these three different functions occur in three different areas of the scrubber: The DYNAWAVE^® is different from conventional scrubbers in that it uniquely handles all three these functions in the same zone of the scrubber, known as the "froth zone". This straightforward approach reduces both capital and operating costs. Most importantly, this approach allows minimal equipment inside the vessel, making DYNAWAVE^® an extremely reliable scrubber.

Basic DYNAWAVE^® compounds

1. froth zone

2. inlet barrel

3. disengagement vessel

4. droplet separator

5. auxiliary equipment : pumps, fans, piping, valves, instrumentation, ...

Advantages

handles huge dust loads (up to 100 g/m³)

no plugging : large, open bore liquid    injectors, non-restrictive open vessels

reduced purge, by operating at high concentration up to 45 w%

multiple functions in one vessel

broad turndown ratio

low maintenance

simple to operate

high on-stream reliability