- Air blaster
An air blaster or air cannon is a de-clogging device composed of two main elements : a pressure vessel (storing air pressure) and a Triggering mechanism (high speed release of compressed air). They are permanently installed on silos, bins and hoppers walls for all powdery form of materials, thus preventing caking and allowing maximum storage capacity.
Air blasters do not need any specific air supply. Available plant air is enough with a minimum of 4 bar
air pressure(60 psior 400 kPa), although 5 to 6 bar are preferred for better results (75 to 90 psi). The average air consumption is moderate, and depends on the number of firings per hour, size of the pressure vessel, and number of air cannons installed. For instance, a 50-liter air cannon consumes 0.60 Nm³/hour at 6 bar air pressure (90 psi or 600 kPa), with 2 firings per hour.
The compressed air contained in the pressure vessel is instantly released, and the achieved blast, called the impact force, evacuates material sticking to the walls (rat holing), as well as breaking potential bridging thanks to the shock wave obtained.
The blast are usually organized by using an automatic sequencer
*Phase 1: Air feeding: Air supply from the
air compressorpasses through a 3/2 way solenoid valvefeed, the Quick Release Valve (QRV), and reach the triggering mechanism with its piston disc in closed position. The air reservoir is then pressurized in less than 15 seconds, depending on the air pressure and air volume used.
*Phase 2: Waiting: An air pressure equilibrium between air circuit, triggering mechanism, and pressure vessel is created.
*Phase 3: Blasting: When activated, a solenoid valve purges the air circuit, thus creating an air vacuum. Then, the piston inside triggering mechanism is abruptly pushed back by negative pressure, thus creating a sudden blast from the air contained in the pressure vessel. This phase is measured in milliseconds.
*Then the cycle repeats again at Phase 1.
Design criteria and construction
An efficient air blaster should be designed to ensure:
* Complete safety for the operators, thus avoiding harsh rodding or other manual cleaning methods;
* A sturdy design, able to cope with the most severe operating conditions;
* Easy maintenance, due to an easily accessible triggering device;
* A metal-to-metal construction design, making the air blaster extremely reliable even in harsh environment (such as exposed to heat and/or dust);
* A cost effective solution to all customers that prevents hopper, bin, and silo discharge interruption, as well as process disruption.
Usually 2 versions exist:• High temperature version: mainly for heat exchanger and cooler applications to remove clogging and to avoid costly plant stoppages and downtime; • Low temperature version: to eliminate build-up and dead stock for powdery and granular materials thus preventing caking and allowing optimization of storage capacity.
Air blasters solves problem occurring in Cement factories among other industries, with blockages occurring in preheater towers (Kiln inlet, Cyclones, riser ducts...etc) and in grate coolers, thus providing substantial savings.
* [http://www.staminair.com Vortex Air Blastair website] The technology and specifications used in the article are provided by Staminair Corporation.
* [http://www.martin-eng.com/products.php?category=9 Martin Engineering website]
* [http://www.standard-industrie.fr/english/prod_airchoc.asp Standard Industrie website]
Wikimedia Foundation. 2010.
Look at other dictionaries:
Air Buster — エアバスター Разработчик Kaneko Издатель Kaneko, Namco … Википедия
Air cannon — may refer to: * Air blaster, a compressed air device to unblock large storage containers for powdery material. * Air cannon (mechanics), a compressed air device for creating high pressure shock waves under water * Compressed gas powered gun *… … Wikipedia
Air Buster — Infobox VG title=Air Buster developer = Kaneko publisher = Kaneko distributor= designer=Hiroshi Kaneko and team version= released = 1990 (Arcade) 1990 (Nec PC Engine as Aero Blasters) genre = Shooter game modes = Single player, 2 player co op… … Wikipedia
Air India Flight 182 — Boeing 747 237B Emperor Kanishka landing at London Heathrow Airport on 10 June 1985, a few days before the explosion Occurrence summary … Wikipedia
Air Raid (Transformers) — Air Raid was the name of three fictional characters in the Transformers universes.Transformers: Generation 1Transformers character name =Air Raid japanname =Air Raider caption = affiliation =Autobot subgroup =Aerialbots rank = function =Warrior… … Wikipedia
Air Raiders — Desarrolladora(s) M Network Distribuidora(s) … Wikipedia Español
Blaster Master — For other games in the Blaster Master series, see Blaster Master (disambiguation). Blaster Master … Wikipedia
Blaster Bates — For the non alcoholic drink recipe, see Blaster Bates (drink) Blaster Bates was the name used by Derek Macintosh Bates (February 5 1923 ndash; September 1 2006), a British explosives and demolition expert; and raconteur, who was born in Crewe. He … Wikipedia
blaster — blast ► NOUN 1) an explosion, or the destructive wave of highly compressed air spreading outwards from it. 2) a strong gust of wind or air. 3) a single loud note of a horn or whistle. 4) informal a severe reprimand. 5) N. Amer. informal an… … English terms dictionary
Border blaster — A border blaster is a licensed commercial radio station that transmits at very high power from one nation to another. Border Blasters should not be confused with international broadcast stations.The term is perhaps most widely used in the United… … Wikipedia