Help with practical Dust Explosion assessment
Help with practical Dust Explosion assessment
(OP)
Dear All,
I need some help regarding dust explosions. I have to assess wheather we can blow Titanium Oxide (TiO2)to atmosphere (about 2.5 Kg/day) or collect it in a dust collector (I am still working through the UK environmental legislation).
Assuming a dust collector is used however, how can I determine the dust explosion hazard??? Is there still a hazard in collectors??? As you can see I am quite new to the dust explosion subject, and all help is much appreciated.
I understand that dust explosions are related to temperature, any Idea where I can find out the minimum concnetratio at a given temperature for a dust explosion of Titanium Oxide (Ti02)????
I need some help regarding dust explosions. I have to assess wheather we can blow Titanium Oxide (TiO2)to atmosphere (about 2.5 Kg/day) or collect it in a dust collector (I am still working through the UK environmental legislation).
Assuming a dust collector is used however, how can I determine the dust explosion hazard??? Is there still a hazard in collectors??? As you can see I am quite new to the dust explosion subject, and all help is much appreciated.
I understand that dust explosions are related to temperature, any Idea where I can find out the minimum concnetratio at a given temperature for a dust explosion of Titanium Oxide (Ti02)????





RE: Help with practical Dust Explosion assessment
Here's some of what NFPA 481 says about titanium dusts and dust collection systems:
Industry experience has clearly demonstrated that an eventual explosion can be expected where a bag- or media-type collector is used to collect titanium fines. Seldom, if ever, can the source of ignition be positively identified. In those unusual instances where it becomes necessary to collect very small fines for a specific commercial product, it is customary for the producer to employ a bag- or media-type collector. Since this presents a strong explosion potential, the bag- or media-type collector should be located a safe distance from buildings and personnel.
If a bag- or media-type collector is used, the shaking system or dust removal system can be such as to minimize sparking due to frictional contact or impact. Pneumatic or pulse-type shaking is more desirable than systems that use mechanical moving parts such as fan-driven systems because no mechanical moving parts are involved in the dusty atmosphere. If the bags are provided with grounding wires, they can be positively grounded through a low-resistance path to ground. Where bags are used, it is customary that the baghouse be protected by an alarm that indicates excessive pressure drop across the bags. An excess air temperature alarm is also frequently used. A bag- or media-type collector is customarily located at least 50 ft (15 m) from any other building or operation. It is not customary to permit personnel to be within 50 ft (15 m) of the collector during operation or when shaking bags. Explosion vents are usually built into the system, as described in NFPA 68, Guide for Venting of Deflagrations. Care is customarily exercised in locating the vents because of the possibility of blast damage to personnel or adjacent structures.
Hope this leads you in the right direction. You can subscribe to NFPA at www.NFPA.org
Bryan
www.SAFTENG.net
RE: Help with practical Dust Explosion assessment
Jim
RE: Help with practical Dust Explosion assessment
RE: Help with practical Dust Explosion assessment