Explosion Protection by
Application Type

Explosion Protection by Application Type

Cyclone Separators

Cyclone separators are used both as receiving vessels and for the collection of dust. The dust or granular material is thrown to the walls of the cyclone and then falls to the hopper section from which it discharges via a rotary gate valve. Meanwhile the cleaned air exhausts through an outlet.

Dust Collectors

Dust collectors work by separating particulate matter from a flowing air stream. In most instances, the process involves three stages. The trapping of dust in filters, the pneumatic cleaning of the filters periodically, and the removal of the collected dust by means of a rotary valve or pneumatic conveyor.

Fluid bed dryers

Fluid bed dryers utilize hot air forced up beneath a bed of moist (yet combustible) dust in the drying process. This ensures that a turbulent dust suspension, and therefore an explosive situation exists in the head space of the dryer at all times.

Grain elevators

Fenwal X-PAC Protection Systems provide a systematic approach to protecting the head and boot areas of grain elevators. Using safe, environmentally-friendly agents especially formulated for explosion isolation, these reliable systems react in milliseconds to stop explosions from propagating from one component to another.

pneumatic Conveyng

The Fenwal System utilizes pressure detectors at key points along the conveying route. When an ignition occurs, high-rate-discharge (HRD) extinguishers apply an explosion suppressant to the hazard area, suppressing the explosion and preventing an impending explosion in adjacent equipment.

process isolation

Fenwal Isolation Systems — either chemical or mechanical — are designed to detect incipient explosions and react in milliseconds. In the chemical method, an explosion suppressant is discharged into the pipeline to chemically inhibit flame propagation. The mechanical method uses a high speed knife valve to form a physical barrier in the pipeline to prevent the fireball from propagating.

pulverizers

Milling systems present a special hazard. Not only do they produce fine materials, their moving parts and the energy created during their operation produces the potential for ignition. In addition to internally created ignition sources, foreign materials in the feed stream can cause impact sparks.

ring dryers

If the material being handled by a process is combustible, then the dust it generates is likely to be explosive. In flash drying systems the material being processed becomes more sensitive to ignition as it passes down the dryer and loses its moisture. The minimum ignition energy of the dried product can be low enough to present the threat of ignition by static discharge. Additionally material adhering to the walls of the dryer can absorb enough energy to self ignite.

spray dryers

A Fenwal Explosion Protection System is custom-designed to the exact specifications of each spray dryer. Pressure detectors are placed in the lower unit where an explosion is likely to start. Fast acting high-rate-discharge extinguishers are strategically located to deliver an explosion suppressant to the lower and upper sections of the dryer and also to the outlet duct.

waste shredders

The Fenwal Explosion Protection System strategically locates sensitive pressure detectors where an explosion is likely to start... above and below the shredder rotor, infeed and dribble chute and in the discharge area. At the first indication of a pressure buildup, these detectors trigger the discharge of an agent that suppresses the fireball in milliseconds.