Venturi Scrubber

Venturi Scrubber

To remove sub-micron particles from flue gas MDSJ 's Venturi scrubber uses a wet process utilizing high pressure drop. Our venturi scrubber features a wetted wall inlet that eliminates wet-dry build-up. Distributing the scrubbing liquid over a inlet perimeter of the venturi (Weir) eliminates the use of spray nozzles any potential for plugging. Downstream of the venturi an efficient entrainment separation is accomplished using either a mist eliminator or a cyclonic separatorThe 3 sections of a MDSJ Venturi scrubber are converging, throat, and diverging sections. Inlet gas stream enters the scrubber at the converging section. As the gas cycles down to the throat it increases speed causing liquid from the walls to tear into tiny droplets. These tiny liquid droplets entrain particles. Downstream particle removal happens in the diverging section as the gas is forced to slow down. A Venturi Scrubber can be engineered to collect both particulate and gas pollutants. That being said, the most efficient use of a Venturi Scrubber is to remove particles. Packed towers, FGD, and other scrubber technology are more efficient at removing gas pollutants.

Venturi Scrubber Advantages

• Over 99.9% + collection efficiency into sub-micron range

• No wet-dry build-up

• Venturis up to 80 in. of pressure drop available to remove sub-micron particulate

• Adjustable venturi throat available (manual or automatic)

• No spray nozzles or distribution jets to eliminate plugging

• Slurries with high solids can be recycled

• Non-clogging

• Water level control not required

• Handles high inlet gas temperatures and particulate levels

Optional packed tower section: for gas absorption

Various construction materials such as Inconel, Hastelloy, 317L S.S., and FRP available: for corrosive applications is an excellent choice for any business that is looking to go green and reduce its environmental impact. These devices use a unique system design to scrub the air clean, without using any harmful chemicals or pollutants. This makes them

MDSJ Venturi Scrubber Type VVO, although included as a standard equipment item in our gas scrubbers, resists standardization and requires more of a "custom design" approach. Decisions such as liquid supply, venturi throat design, construction materials, etc., must be based on specific operating conditions. In some cases, to withstand corrosion and/or erosion conditions, multiple material types or combinations thereof (alloys, fiberglass-reinforced polyester, epoxy-coated or rubber-lined steel) may be the most practical choice.

• Integrated recirculation tank providing liquid supply for the venturi;

• Pre-cooler at the venturi inlet to properly condition high-temperature gases;

• The final cooler section must be carefully considered to achieve satisfactory performance with a robust and practical equipment design.

The collection efficiency of the MDSJ Venturi Scrubber is a function of the pressure drop at the throat, which in turn is a function of the amount of submicron particulate matter suspended in the gas stream. Scrubbers can be supplied to operate at pressure drops ranging from 200 to 1400” W.G or higher. For applications requiring the maintenance of a predetermined pressure drop level for varying inlet volumes, the scrubber can be equipped with an adjustable throat mechanism. This feature also allows for pressure drop adjustments to enhance collection efficiency and meet increasing process or regulatory requirements.