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Contact

VST Engineering, spol. s r.o.
Semtín 79
533 53 Pardubice

Phone: +420 464 646 414
Fax: +420 464 646 415
E-mail: vst@vst.cz

Actualities

01. 04. 2016 POWTECH 2016

Company VST Engineering will attend POWTECH in Norimberk on 19.4.2016 - 21.4.2016.

07. 01. 2016 VST becomes stronger

Company VST Engineering has successfully completed the construction of a completely new storage space.

06. 10. 2015 SOLIDS 2015

Company VST Engineering will attend SOLIDS in Dortmund on 4.11.2015 - 5.11.2015.

An explosion in an industrial process

An explosion is a rapid combustion (oxidation) that is characterized by an increase in temperature and pressure. An explosion can occur when an explosive atmosphere meets a source that is capable of igniting it.

 

Why is it necessary to consider an explosion?

Even though explosions are not a daily event, the risk of a possible explosion must not be underestimated. The results are often extensive damage to technological facilities, or buildings if applicable, but as a result of this destruction, often also the damage to health and quite often even the life of employees in proximity to an explosion.

 

Are your operations in threat of this risk?

The risk of an explosion extends across all industrial sectors. It is present where transport, storage, processing and/or handling of dust or substances with a significant fraction of dust are involved that creates an explosive atmosphere when mixed with air.
Among dusts that create an explosive mixture are brown and black coals, lignite, sulphur, carbon, resin, biomass, cereals and their products, sugar, dried milk, bone and meat meal, feed mixtures, plastics, pharmaceuticals, toners, powder lacquers, powder paints, metallic dusts (aluminium, magnesium, titanium, zinc and its alloys), etc.
A mixture of explosive substance mixed with air creates an explosive atmosphere. Even if the facility does not contain air, but also for example combustion products, an explosion cannot be rules out, because the limit concentration of oxygen depends on a series of other operating conditions (e.g. on temperature).
If an ignition source is present in such a facility, then the ignition of the explosive atmosphere occurs. The most frequent ignition sources within a facility are mechanical sparks, a hot surface, flame or glowing particle, electrostatic discharge and/or an electrical device. Typically, it is difficult or impossible to remove these ignition sources.

 

What typical operations possess a risk of dust explosion?

 

Typical operations with the risk of dust explosion are heating plants, power plants, mills, sugar refineries, feed mixture factories, silos, plastic, furniture manufacturing plants, dust paint shops and other operations or their parts in which the grinding and milling of materials takes place, aspiration or separation of dust, storage of dust or substances with its high proportion, mechanical and pneumatic transport, drying, mixing, etc. The risk of explosion in these operations exists for certain at least in a certain area of the operation or in a certain facility that they include.


What are typical devices at risk of dust explosion?

Typical devices at risk of dust explosion are mills, grinders, filters, separators, elevators, pneumatic transport devices, reservoirs and silos, dust collectors, dryers, etc.


How is it possible to minimize the risk of a dust explosion during operations or in a facility?

If an explosion cannot be prevented, the facility must be safeguarded. The purpose of safeguarding is to limit any eventual explosion to an acceptable level. Devices used for this purpose are called protective systems.

 

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