Wet Scrubbers

Capture sub-micron dust with Venturi Wet Scrubbers

The Nederman MikroPul Venturi Wet Scrubber accelerates dirty gas through an adjustable throat, where it collides with scrubbing liquid to trap particles other collectors miss — even on hot, humid, high-concentration streams.

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How it works

The scrubbing cycle, from entry to clean gas

A venturi scrubber captures particulate by accelerating dirty gas through a narrowing throat, where it collides with scrubbing liquid. Follow the eight stages of a single pass.

Gas enters
Dust-laden gas enters the wet-approach venturi.
Meets liquid
Gas instantly contacts scrubbing liquid introduced tangentially.
Swirls down
The stream swirls along the venturi's converging walls.
Collides at the throat
At the adjustable throat, streams collide and liquid breaks into droplets that trap dust.
Enters separator
The mixture passes a flooded elbow into the entrainment separator via a tangential inlet.
Centrifugal removal
Centrifugal action pulls heavy wetted particles out of the gas stream.
Discharges
The dust/liquid mixture drains from the separator bottom.
Clean gas exits
Cleaned gas leaves through the top of the separator.

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Why should you choose the Venturi Scrubber

Venturi Wet
Dust Scrubbers

Nederman MikroPul’s flexible designs are well suited to solving problems across multiple industries. These include mining, chemicals, food, pulp & paper, explosive dust and metals applications, such as HCl and particulate removal in Aluminum refining. MikroPul venturi scrubbers are designed for long working life with minimal maintenance. Our experienced engineers deliver superior yet simple venturi scrubber designs in appropriate materials, with optimized features to suit your specific application.

Nederman MikroPul venturi scrubbers are valuable in processes needing high particulate removal efficiency, typically greater than 99.9% for sub-micron particles. They excel in high inlet gas temperatures, high dust/particle loading and high percentage of solids in the liquid recirculation loop.

99.9%+
efficient on sub-micron particles

High-temp
handles hot gas streams

Minimal maintenance
few moving parts, long life

Flexible
designs built to your application

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The design

A wet-approach venturi and a liquid entrainment separator

The Nederman MikroPul Venturi Scrubber pairs a “wet approach” venturi with a liquid entrainment separator. Dust-laden gases enter the venturi and immediately meet the tangentially introduced scrubbing liquid swirling down the converging walls.

At the adjustable throat, the gas and liquid streams collide and the liquid breaks into droplets that trap dust particles. The mixture passes through a flooded elbow into the entrainment separator through a tangential inlet, where a cyclonic separator removes the heavy wetted particles. When very large-diameter separation is required, a chevron-type mist eliminator baffle separates the liquid instead.

The dust/liquid mixture discharges from the separator bottom drain and cleaned gas leaves through the top. Because the design uses open pipe liquid inlets with no spray nozzles, maintenance stays minimal.

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Technology Overview

Advantages of venturi wet scrubbers

Compared with filters and other dust collection equipment, venturi scrubbers stay compact while handling gas streams that are high-temperature, high-humidity or particle-laden.

	Advantage
Equipment size	Smaller footprint than comparable dry collection equipment.
Materials	Wide choice of construction options to suit the process chemistry.
Maintenance	Very few moving parts; open pipe inlets with no spray nozzles.
Cleaning	Continuous blow-down of scrubbing liquid with freshwater makeup reduces downtime.
Performance	Handles gas with high humidity and high temperature.
Particulate	High concentrations; efficiency above 99.9% for PM2.5.
Scrubbing liquid	NaOH, H₂SO₄ or reagents customized to suit the chemistry.
Options	CIP nozzles, controls and multi-venturi configurations.

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What scrubbing liquid is used in a chemical scrubber?

Reagent selection depends on what chemical is being treated. Scrubbing liquids are typically an acid, a base or sodium hypochlorite — matched to neutralize or capture the target compound.

Caustic (NaOH)
Sulfuric acid (H₂SO₄)
Phosphoric acid
Sodium hypochlorite

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Configurations

Three basic designs

From a single-stage venturi to multi-stage and multi-venturi rod-deck designs, each is matched to the removal level, pressure drop and footprint your process demands.

Venturi Wet Scrubber

The core design: a wet-approach venturi followed by a cyclonic entrainment separator. Continuous blow-down and freshwater makeup keep cleaning frequency low, and an optional Clean-In-Place (CIP) manifold — internal nozzles with piping, valving and chemical injection ports — adds further ease of maintenance.

Multi-Stage Venturi Wet Scrubber

For applications where one stage of wet scrubbing isn't enough to fully remove the target particles from the air flow, venturi stages are arranged in series to reach the required removal level.

Multi-Venturi Wet Scrubber

This design uses a venturi-rod deck — a series of rods that create a venturi effect between each rod — for higher efficiencies at lower pressure drops and liquid-to-gas ratios than conventional venturi scrubbers.

Atomized scrub water is sprayed co-currently through low-pressure, large-orifice nozzles across the deck. Gas accelerates through the rods, creating small droplets that encapsulate submicron particles. A two-stage demisting zone removes free water — the pre-demist area drops out 90% of the water and final demist vanes catch the rest — before dewatered gas exhausts via the outlet. The rod-deck design is easy to maintain.

multi-venturi-wet-scrubber

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Applications

Typical venturi scrubber applications

Mining

Ore processing & handling

Chemicals

Reagent gas cleaning

Food

Process emissions control

Metallurgy

Fume & particulate capture

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Ready for modernization or expansion?

Existing plants often need to meet new production requirements, stricter clean-gas expectations or changing conditions. We support:

Modernization of existing dust collectors
Expansion of installed systems
Retrofit to changed process requirements
Technical optimization of plant performance

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Common things to know

Frequently Asked Questions

Answers to common questions about the FS flat bag filter

What is a venturi scrubber and how does it work?

A venturi scrubber captures particulate by accelerating dirty gas through a narrowing throat, where it collides with scrubbing liquid. The collision shatters the liquid into fine droplets that trap dust; the gas/liquid mixture then enters an entrainment separator, where centrifugal action removes the wetted particles before cleaned gas exits the top.

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What efficiency can a venturi scrubber achieve?

MikroPul Venturi Wet Scrubbers achieve efficiency above 99.9% for sub-micron particles, including PM2.5, even on high-temperature and high-humidity gas streams.

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What scrubbing liquid is used in a chemical scrubber?

Reagent selection depends on the chemical being treated. Scrubbing liquids are typically an acid, a base or sodium hypochlorite — common examples include caustic (NaOH), sulfuric acid and phosphoric acid.

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When should you use a multi-stage venturi scrubber?

A multi-stage venturi wet scrubber is used when one stage of wet scrubbing isn't enough to fully remove the target particles from the air flow. Venturi stages are arranged in series to reach the required removal level.

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Why do venturi scrubbers need so little maintenance?

Aside from a system fan and recirculation pump, venturi scrubbers are essentially solid-state with very few moving parts. The standard design uses open pipe liquid inlets with no spray nozzles, and continuous blow-down with freshwater makeup reduces cleaning frequency. An optional Clean-In-Place (CIP) manifold adds further ease of maintenance.

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Talk to a Process Technology Expert Today

Connect with Nederman MikroPul to improve your dust collection.

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Nederman MikroPul Americas

Dust Collection Systems

Protecting People, Uptime, Performance with Nederman MikroPul. Thousands of Installations Worldwide

4433 Chesapeake Dr, Charlotte, NC 28216, USA

+1 704-285-1754

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Last updated: July 2026

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Capture sub-micron dust with Venturi Wet Scrubbers

The scrubbing cycle, from entry to clean gas

Gas enters

Meets liquid

Swirls down

Collides at the throat

Enters separator

Centrifugal removal

Discharges

Clean gas exits

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Why should you choose the Venturi Scrubber

Venturi WetDust Scrubbers

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A wet-approach venturi and a liquid entrainment separator

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Advantages of venturi wet scrubbers

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What scrubbing liquid is used in a chemical scrubber?

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Three basic designs

Venturi Wet Scrubber

Multi-Stage Venturi Wet Scrubber

Multi-Venturi Wet Scrubber

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Typical venturi scrubber applications

Mining

Chemicals

Food

Metallurgy

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Ready for modernization or expansion?

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Frequently Asked Questions

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Talk to a Process Technology Expert Today

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The scrubbing cycle, from entry to clean gas

Gas enters

Meets liquid

Swirls down

Collides at the throat

Enters separator

Centrifugal removal

Discharges

Clean gas exits

Why should you choose the Venturi Scrubber

Venturi WetDust Scrubbers

A wet-approach venturi and a liquid entrainment separator

Advantages of venturi wet scrubbers

What scrubbing liquid is used in a chemical scrubber?

Three basic designs

Venturi Wet Scrubber

Multi-Stage Venturi Wet Scrubber

Multi-Venturi Wet Scrubber

Typical venturi scrubber applications

Mining

Chemicals

Food

Metallurgy

Ready for modernization or expansion?

Talk to a Process Technology Expert Today

Venturi Wet
Dust Scrubbers

Venturi Wet
Dust Scrubbers