The explosion principle: first, look at the classification of explosive dust and grouping.
Dust explosion accident prone with aluminium powder, zinc powder, ferrosilicon powder, magnesium powder, iron powder, aluminum processing flour, all kinds of plastic powder, drug intermediates in organic synthesis, flour, sugar, sawdust, dye, phenolic, milk powder, tea powder, powder, dust, smoke dust plant fiber etc.
The material dust yi is the cause of explosion combustion contain strong reductant H, C, N, S and other elements.
when they coexist with peroxide and explosive dust, they through the oxidation decomposition and produce a lot of gas.
Or gas volume is small, but it released a lot of heat of combustion.
For example, as long as the aluminium powder in the atmosphere of carbon dioxide, it is in danger of explosion.
The difficulty of dust explosion and dust in the physical, chemical and environmental conditions.
It is generally believed that the greater the heat of combustion, the easier it is to the explosion, such as coal dust, carbon, sulphur, etc.
Oxidation speed of material easily explosion, such as magnesium powder, aluminum powder, ferrous oxide, dyes, etc.
it is easy to explode easily charged dust, such as synthetic tree powder dust, fiber, starch, etc.
These conductive material with machine or air friction and the accumulation of static electricity, when reaches a certain amount, it will be released to produce edm, thus forming a blast of fire.
Usually is unlikely to cause the dust explosion is soil, sand, iron oxide, abrasive, cement, Shi Yingchen and burning like dust.
Dust the chemical properties of the material is relatively stable, not easy to burn.
However, if the dust is in the oil mist and combustible gas (
Such as CO, CH4 and gas)
To produce, it is also easy to explode.
dust explosion can be divided into three steps: step is under the effect of heat source of suspended dust quick distillation or gasification generate combustible gas, the second step is a mixture of combustible gas and air, the second step is the burning of combustible gas and air.
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the third step is to dust combustion heat release, in the form of heat transfer and flame radiation is passed to the nearby suspended or blows away the dust.
After the dust by thermal evaporation and combustion cycle continues.
With each cycle of continued, the reaction rate was accelerated, by severe burning, explosion can eventually form.
This explosion reaction, fire and explosion speed, explosion wave velocity and explosion pressure, etc. , will continue to accelerate and increase, and present a leap-forward development.
so, if the customer has the above product powder need to packing, it must select explosion-proof machine.
A kind of heat pumping air into vacuum state, sealing, cooling the one-time completed function, apply to food, aquatic products, chemical raw materials, electronic components, precision parts and other products of vacuum sealing, can prevent oxidation, mildew, corrosion, moisture, but also extend the product with good quality fresh storage life of the machine.
Don't choose to save money not suitable vacuum
packaging machine, although the interests of the eyes can't see anything, once the explosion problem would be too late.
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