If your exhaust air flows are damp and contaminated with gases, our venturi scrubber will clean them safely and efficiently.

Venturi scrubbers

Exhaust air cleaning

Venturi scrubbers are a proven, industry wide solution for air pollution control. Our HNA venturi scrubber can reliably remove dust from damp exhaust air flows. This wet scrubber is designed for clean gas dust contents of below 5.0 mg/m³ with reasonable energy expenditure. The scrubbing liquid is treated and cleaned via automatic belt filters or time-controlled outlet valves, which empty automatically during the operation of a partial load.


  • Safe separation of moist and sticky dusts
  • No risk of condensation
  • Reliable continuous operation
  • Low water consumption
  • Low clean gas dust values
  • Low maintenance and spare parts requirements


  • 24/7 operation
  • Low clean gas dust content <5.0 mg/m³
  • Scrubbing liquid recirculation
  • Belt filter for cleaning the scrubbing liquid
  • Automatic dosage
  • Automatic partial discharge
  • Trace heating for outdoor installation


  • Tire / Rubber

    Riedel Filtertechnik offers a wide range of standard and individual solutions for process exhaust in tire production – from dust extraction to odour emission reduction. Our specially designed dust extraction systems keep emissions well below the limit values of 10 mg/m³. That typical smell of rubber is eliminated by our COPLAS clean cold plasma air cleaner system in an energy-efficient and reliable way. So, tire production can become more sustainable than with conventional technologies.

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  • Tobacco

    We have been an innovative partner to the tobacco industry for over 50 years. We are established worldwide as a system supplier of exhaust air purification and industrial odour reduction systems in the manufacturing of cigarettes. Our pneumatic transport systems, central vacuum cleaning systems and machine cleaning systems are designed to achieve our main goals: environmental protection, energy efficiency and increased yield in the tobacco industry. We continue to innovate in the primary and secondary sectors with effective and patented technologies.

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  • Sugar

    We have been an established partner to the global sugar industry for dedusting and sugar conditioning for decades. Our in-depth process knowledge makes us more than just an equipment supplier for many of our customers. As a process solution partner, we develop individual concepts together with our customers – perfectly matched to the specific requirements and circumstances.

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  • Food

    Cereals, oil or milk powder – food production is characterised by the variety of food products alone. Countless process steps including extrusion, drying, cooling or product packaging are completed for their production. As a result, dust or strong-smelling odour emissions are inevitably released into the environment and are subject to strict limits. We help our customers to comply with these emission limits by offering a wide range of products – from dust removal to industrial odour control systems.

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  • Pet food

    Pet food production involves numerous process steps – extrusion, drying, cooling, machine extraction or even wet food cooking. During the processing of wet and dry pet food, dusts and odorous substances are released into the exhaust air, which can pollute the environment. Riedel Filtertechnik offers a wide product portfolio with individual solutions for pet food production. We cover everything from dust extraction and dedusting of conveyors, extruders and dryers to the reduction of odour emissions.

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  • Compound feed

    In compound feed production, odour-intensive substances are often added for specific recipes. As a consequence, odour emissions are produced that can pollute the environment. Grinding fine, dry ingredients and pelleting also produces dust emissions, which can be controlled using our filter systems. Our COPLAS clean cold plasma technology for air cleaning reduces any odours sustainably without any chemicals or waste products.

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Sugar // Nigeria

Dryer exhaust at a sugar factory

Venturi wet scrubber HNA450/600

  • Air volume: 55,000 m³/h
  • Air temperature: 40-60°C
  • Raw gas dust content: 60,000 mg/m³

Two-stage venturi for high dust loading

Tobacco // Thailand

Extraction of primary tobacco processing in Thailand

Venturi scrubber HNA130/170 for lamina line

  • Air volume: 15.000 m³/h
  • Air temperature: 70-80°C
  • Clean gas dust content: < 10.0 mg/m³
  • Ammonia reduction

Venturi scrubber HNA450/600 for Burley line

  • Air volume: 50.000 m³/h
  • Air temperature: 70-80°C
  • Clean gas dust content: < 10.0 mg/m³
  • Ammonia reduction

Venturi scrubber HNA170/220 for stem line

  • Air volume: 20.000 m³/h
  • Air temperature: 150-200°C
  • Clean gas dust content: < 10.0 mg/m³
  • Ammonia reduction


  • pH measurement and acid dosage
  • Automatic partial emptying with conductivity measurement
You are looking for a scrubber to remove dust from exhaust air flows?
Please get in touch with us!

You can contact us via phone and email or use our contact form. We are looking forward to hearing from you!

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