Self Reclosing Explosion Doors
The TV Explosion Door from ATEX is a high performance explosion venting solution for aggressive environments. It provides economical explosion relief and prevents secondary fire damage from oxygen intake by rapidly self re-closing after the explosion is vented. The cement and steel industries have a long association with coal as a source of heat in their kiln plant but now they experience the changing times of more sustainable fuels sources from tyres to sludge pellets.
The Self Reclosing Door Method
Since most of the plant is located outside, venting is not a major problem but you need to vent a lot of kinetic energy from the mills to filter to silos and prevent the reintroduction of flesh air after the explosion event to minimise subsequent fires or secondary explosions.
The most popular choice for endurance and efficiency is the TV self reclosing vent doors and flame diverters.
In the example below Vent 1 vents the primary explosion force reducing the velocity to the filter. Vent 2 diverts the resultant slower flame from the Filter. The Filter and silo are then vented as individual components without the concern of pressure piling or flame jet ignition.
Many of these systems are further protected by inerting using Nitrogen or CO2. Ths is only possible with a self reclosing door. Important in these industries are the durability of the explosion door and its self reclosing feature to prevent the ingress of air after the explosion, minimising the potential fire damage.