Super Air Amplifier Increases Airflow In Vaccum Hood For Fume Extraction

A couple days ago I  took a call from an extrusion company who was looking to increase the airflow in their plating operation. They manufacture several different shapes and styles of aluminum extrusions by the way of 8 large extrusion presses. On one of the presses they make a specialty line of products that are sent to a finishing operation to be anodized.

Above the anodizing process tanks they use a vacuum hood to capture fumes and send them to a scrubber system so the air can be cleaned before being exhausted. They were starting to see an increase in the level of VOC (Volatile Organic Compound) gases in the area and, after some internal testing, determined the existing system wasn’t moving enough air through the system for the gases to be adequately delivered to the scrubber tank.

Example of a scrubber system

After further discussion, the customer ordered our Model # 120022 2″ Super Air Amplifier to test under our Unconditional 30 Day Guarantee.  Air Amplifiers are one of the most efficient products in the EXAIR catalog. Using a patented internal shim, they use a small amount of compressed air that passes through an internal chamber where it is exhausted through a thin gap at high velocity. This directed airflow creates a lower pressure at the intake side which draws in a large amount of free air. The 2 combining air flows result in a large volume of “amplified”, high velocity exhausting airflow, making them ideal for increased air movement.

Air Amplifiers entrain enormous amounts of “free” air, at ratios of up to 25:1!

If you have an application where you need to increase airflow or if you’re looking to vent or exhaust noxious fumes, an Air Amplifier is the ideal choice. For help selecting the best Model or to discuss a particular process, please contact an application engineer for assistance.

Justin Nicholl
Application Engineer
justinnicholl@exair.com
@EXAIR_JN

 

Pueblo Chemical Agent-Destruction Pilot Plant Agent Processing Building courtesy of PEO ACWA via creative common license.

 

Special Air Amplifier? Not A Problem!

This week I worked with two customers that wanted to boost their air flow with an Air Amplifier. One customer ended up going with a Special Air Amplifier. The second customer I ended up pointing to a different product line entirely. Keep reading to find out why.

The first customer needed to boost the exhaust flow through six inch duct.  The six inch duct was an open vent that allowed fumes to slowly escape from a vessel. During normal operation the vessel, was unmanned, so the fumes only need a path to escape, but could linger. The company wanted to do some maintenance work in the area while the machine was in operation. The vent met the necessary requirements for the air flow of the machinery, but left maintenance workers exposed to a variety of fumes while working in the vessel, if the unit was in operation.

The customer was interested in the model 6034 Stainless Steel Air Amplifier. With 0.002″ air gap and 80 PSIG of inlet pressure, the unit will flow 1,200 SCFM of compressed air at the outlet of the Air Amplifier, but the 6034 can be adjusted to much higher flows from there.  The Air Amplifier would easily be able to exhaust the fumes from the area to maintain a safe and comfortable working environment. The problem was mounting the 6034 Adjustable Air Amplifier. The 6034 is designed to be used in free air with the discharge side of the air amplifier connecting to a duct. The suction side of the Air Amplifier is as open as possible to entrain air, but my customer needed to connect the Air Amplifier to the outlet of the vent. We worked with the customer on designing an Air Amplifier to fit the 6″ Flange that they used to connect sections of their duct similar to the Air Amplifier pictured below.

special air amplifier
This special stainless steel flange-mount Air Amplifier was designed for exhausting hot flue gases from a furnace.

My other customer called to move the air inside a heated drying tunnel. The customer uses a process air heater to heat a large drying tunnel. Unfortunately, the air heater created hot air at the entrance of the drying tunnel. By the time the air reached the end of the drying tunnel the temperature was significantly higher at the top of the tunnel as opposed to the bottom from natural convection. To counter this effect the customer wanted to move air from the process heater half way down the tunnel and release the air. In this application, the customer wanted to duct both the inlet and the outlet of an Air Amplifier. The Air Amplifier is not well suited for ducting and you limit the amount of air that the Air Amplifier can entrain by connecting it to a duct.

For this customer, I recommended he use a Line Vac. The Line Vac typically conveys materials, but it will also move a good amount of air.  The customer was going to use heated compressed air and wanted to convey the air from the process heater to the other side of the drying tunnel. Another key benefit to the Line Vac is the discharge and suction side of the units are both the same size.  This makes it extremely easy to install for the customer and is off the shelf, ready to ship.

Two similar applications on the surface that result in different product recommendation. Not every application for an air mover is this complicated, but if you want to talk through your application EXAIR’s application engineer’s will be happy to help.

Dave Woerner
Application Engineer
@EXAIR_DW
DaveWoerner@EXAIR.com