Stainless Steel Adjustable Air Amplifiers Replace Blower in Exhaust Hood Application

Vent hood
EXAIR Stainless Steel Adjustable Air Amplifiers model 6034

 

I was working with our Indonesian distributor the other day on an interesting application in the sugar refining industry.

The application was in a sugar refining plant. As the sugar cane is cooked down, the resulting gas vapor is pulled up through a vent hood and exhausted outside the building. The customer was using a 16” diameter blower to create the needed draft to draw the vapors. The problem is that the vapors are corrosive and sticky when cold. The effect is that the blower blade becomes caked with deposits which, in turn corrode the blade and it must either be cleaned and/or replaced at frequent and regular intervals.

The customer wanted to get away from having to deal with the blower issue if they can, so they turned to our distributor for ideas on how to solve the problem using EXAIR equipment. Turns out that a cluster of (3) model 6034 4” Adjustable Air Amplifiers operating at 5 BARG input pressure are able to generate the necessary flow to replace the blower in this system.

The keys to success in the application were the fact that the Adjustable Air Amplifiers are constructed of Stainless Steel to resist the corrosive effects of the gas vapor. Also, there isn’t any deposits on the blade that need to be dealt with. While cleaning of the Air Amplifiers is recommended in this application, the maintenance interval was able to be much longer between cleanings.

In many industrial applications, blower driven or electric motor driven equipment is usually preferred in an effort to save energy. This was a good example of a case where the quality of having no moving parts was able to offset other maintenance costs that made use of a blower actually more expensive for the user.

Neal Raker, International Sales Manager
nealraker@exair.com
@EXAIR_NR

 

PEEK – A – Boo

Having an almost 4 year old and an 18 month old at home means I spend at least 15 minutes every evening playing some form of Peek-A-Boo.  Last night it was my oldest holding a blanket in front of her while her younger sister sat on the floor and watched.   Then she would drop the blanket on the ground and yell PEEKABOO!  I’m sure we all know this as the normal version of the game.   However, my oldest also easily confuses Peek-A-Boo with hide and seek as well as just flat out scaring people.  (Which is hilarious until it happens to you.)

baby-peek-a-boo

Here at EXAIR we use a different form of  PEEK.   In fact, we just released another Super Air Nozzle in PEEK plastic.   The model 1104-PEEK Super Air Nozzle.   This nozzle will tout the same performance as the Zinc/Aluminum and Stainless Steel models but will be better suited for certain applications.   Why might someone use a PEEK nozzle instead of a metal one?

IMG_3744

The brief list below is just a few of the advantages.

  • Non Marring
  • Chemical Resistance
  • Hydrolysis resistance
  • Weight Reduction
  • Temperature resistance
  • UV Stability
  • Non-conductive

So if you have an application where you need something a little different than metal, don’t forget we offer many of our Super Air Nozzles in PEEK plastic.

Brian Farno
Application Engineer
BrianFarno@EXAIR.com
@EXAIR_BF

Submarines, Shipwrecks, Air Knives, and Corrosion

Monday was a notable day in naval warfare history. On February 17th, 1864, the H.L. Hunley sank the USS Housatonic, a Union sloop that was blockading the harbor in Charleston, South Carolina, during the American Civil War. In doing so, the Hunley became the first combat submarine to sink a warship in battle. Unfortunately, they never returned.

Treasure hunters and archaeologists searched for the sunken vessel in the years following the war. Despite grand efforts, one even spurred by a $100,000 reward offer from legendary showman P.T. Barnum, the ship and crew were lost to history until 1995. So many people had mistakenly thought they’d found the wreckage that when underwater archaeologist Harry Pecorelli actually did find it, he radioed to his boat, “I don’t know what it is, but it is definitely not the Hunley.” Because of this, the preservation group, Friends Of The Hunley, have affectionately dubbed him “the first person to have never found the Hunley.”

In 2000, the intact ship was raised and placed in a specially built tank, where the conservation team immediately went to work. Because of her iron construction and age, this turned out to be an engineering (mechanical and chemical) feat like no other. Over the next four years, precision excavation efforts allowed the team to exhume the remains of the crew, and they were buried with full military honors in the spring of 2004. They still haven’t proven conclusively why the Hunley sank, but as restoration work continues, she may give up her final secrets yet, as long as they can keep corrosion at bay.

hunley in tank

The prevalent use of aggressive chemicals in certain manufacturing processes today can likewise take their toll on equipment made from materials that aren’t compatible for use in these environments. As advances have been made in the development of these chemicals, metallurgists and materials engineers have kept pace in the field of corrosion resistance. EXAIR has taken full advantage of these innovations by offering our Super Air Knives in a variety of materials that can stand up to just about whatever you can throw at them:

Two grades of Stainless Steel are available: Type 303 is well suited to mildly corrosive environments. Type 316 offers even better corrosion resistance, and is often specified in the food, pharmaceutical, and surgical product industries. Both are also good to 800°F (427°C).

PVDF (Polyvinylidene Fluoride) Super Air Knives are resistant to harsh conditions where UV light, inorganic chemicals, solvents, ozone, weather, fungi, chlorinated hydrocarbons, strong acids, and/or salts are present. They are equipped with PTFE shims, 316SS pipe plugs, and Hastelloy C-276 hardware for superior performance in the most aggressive environments.  These are rated for temperatures up to 275°F (135°C).

Of course, if your application doesn’t concern any of these, our Super Air Knives in aircraft grade aluminum construction are perfect for general purpose applications in standard conditions. Just about wherever you need to install it, though, EXAIR has a Super Air Knife that is up to the task. Try us.

Russ Bowman
RussBowman@EXAIR.com
@EXAIR_RB