Venturi Scrubbers
The Venturi scrubber is a compact wet scrubber that removes dust down to 0.1 µm while simultaneously cooling hot gas streams in a single step. The technology relies on a narrowing Venturi throat that accelerates the gas to as much as 150 m/s; the high relative velocities atomize the scrubbing liquid and “fling” the particles into the droplets.
How the Process Works
- Inlet – Gas and dust are introduced from the side or from above.
- Liquid injection – Scrubbing liquid is sprayed through nozzles in the same flow direction.
- Venturi throat – The flow accelerates; strong shear forces create micro-droplets.
- Collision & agglomeration – Particles hit the droplets (“highway effect”) and become bound in the liquid.
- Separation tank – Gas and liquid are separated; sludge is removed.
- Mist eliminator – Fine liquid droplets are captured before the clean gas goes to the stack or further treatment.
Performance Data for our venturi scrubber
Parameter | Typical range |
Gas flow | 1 000 – 125 000 m³/h |
Liquid consumption | 0.5 – 2 L per m³ of gas |
Pressure drop | 10 – 150 mbar (adjustable) |
Collection efficiency | 90 % at 0.1 µm / 99 % at 1 µm (at 100 mbar) |
Energy consumption | 0.5 – 6.5 kWh per 1 000 m³ |
An adjustable cone in the throat keeps the pressure drop constant when the gas flow varies.
Advantages of Venturi Scrubbers
- Simple, compact design with few moving parts
- Low maintenance cost and high operational reliability
- No fire risk thanks to fully wet operation
- Low capital and operating costs
- Can be combined in multiple stages for extremely high purification demands
Typical Applications
- Hygroscopic, sticky, or swelling dust that clogs dry filters
- Post-drying or combustion steps where both cooling and dust removal are required
- Processes with hot, condensate-rich gas streams
- Filling, mixing, and conveying systems that generate dust emissions
Materials & Customization
Every Venturi scrubber is built to order and can be supplied in:
- Carbon steel or stainless steel
- Rubber-lined or Halar®-coated steel
- Plastics (fiberglass, PP, PVC, PVDF)
- Special alloys for corrosive environments
Capacity ranges from a pilot unit at 1 000 m³/h to full industrial scale at 125 000 m³/h. The adjustable cone allows stable operation under variable loads.
Pilot Equipment
A transportable pilot scrubber (≈ 1 000 m³/h) is available for field tests. It provides data for sizing and verifies collection efficiency before investment.
Contact Us
Need help selecting the right Venturi scrubber? Contact us for a free preliminary study and quotation.
