Manufacturer of dust purifying device explains dust to explode for you main character and explosion proof measure

Explosion is a very complex process, suffer the effect of element of a lot of physics, explosive mechanism up to now still very not clear. As the development of modern industry, pulverous child increasingly grow in quantity, sex of its explosion danger involves all industrial departments almost, the potential risk that this makes dust explodes increases greatly. Because this studies dust explosion property and mechanism are right,accident of precaution and control explosion has important real sense, so everybody is necessary to understand the main character that dust explodes and explosion proof measure, the word that has fun at accordingly can followWeManufacturer of dust purifying deviceSmall make up understand together.

　1, can light dust explosion to produce a condition

Does the condition that produces dust explosion have the following: roughly? ǘ of Min of  of caries of ǘ of Yan Jiu of Mu of ǖ of Xi  Xing Huan bears  to stop W of  Yan Jiu aurelian small piece of land surrounded by water dust of ② of? of  of source of cliff of Wu of Zhe of  of rostellum  Xi has dust of quite big ③ of; of the area that compare a list suspension is in air, close with air rod form the rod inside explosion limit limits to close matter, namely the space that cloud of dust of ④ of; of dust cloud condition should lie to close relatively, pressure and temperature ability lift quickly, ⑤ of; of then happening explosion has enough stir up trouble can basin, most dust cloud is the smallest ignition can the basin estimates class range in 5 one 50mJ.

　 2, can light dust explosion mechanism and characteristic

2.1 can light dust explosion mechanism

The dust that always can be oxidized produces explosion in the metropolis below certain condition. Dust be heated, clever bead element can decompose exterior dust or dry distillation can light gas distributing in all round, next these can light gas and air to mix form flammability gas mixture, produce badge to burn a phenomenon then. The area comparing a list that visits bead as a result of dust is very large, abecedarian combustion heat is absorbed by clever bead itself for the most part, this quickened afore-mentioned carbonization (decompose) , mix, ignition course, then produces the explosive phenomenon of dust. Dust explosion mechanism sees a picture 1.

(Surface of 1) supply particle with heat energy, make its temperature rises.

(The element of 2) particle surface because pyrolysis or dry distillation action, turn into gas distributings it is all round particle.

(3) gas and air mix make volatile gas mixture, get angry then generation blaze.

(4) blaze produces heat energy, quicken dust to decompose, circular move back and forth gives off the flammability material of gas phase and air to mix, farther draw well travels.

　2.2 can light dust explosion characteristic

(1) happening frequency is tall, ruinous strong. As powdery body production, dry, carry, the be changed continuously and dirt system accepts in manufacturing process occurrence of the craft such as memory, make the frequency that dust explosion accident produces increased. The energy that dust explosion produces is big, explosive power is great, explosive temperature is as high as 2000-3000 ℃ generally, pressure of the biggest burst can amount to 700kPa.

(2) is easy cause ” explode 2 times ” . Very easy raise is deposit when dust explosion happens or accumulation dust, even big; is in the dust concentration when its chroma often explodes than the 1st dust explosion center, form the negative pressure division of instantaneous likely, fresh air to explosive center refluent as volatile as the dust reconstitute of new raise dust and produce the 3rd explosion, explosion the 2nd times to wait, because dust concentration is big, subsequently explosive pressure is so greater than first time, ruinous more serious.

(3) explosion child is easy it is completely not tender burn child. Compare with the explosive photograph of general gas, because dust is medium the capacity that can disrelish content is relatively much, what the shake when dust explodes burns is to decompose the aeriform production that come out, ash content is to have not enough time to write those who burn.

(4) explosion can produce two kinds of toxic gas. One kind is to carry change carbon, another kind is explosive child (be like plastic) the toxic gas that oneself decomposes.

3, the preventive measure that dust explodes

The property that studies dust is to reduce the harm of dust, the condition that explodes according to dust, mechanism, characteristic reachs influencing factor, can offer the measure that dust of a few precaution explodes, use dust to light rule of exploded happening, development to be able to develop a few constructions that reduce dust explosion harm additionally explosive preventive measure.

　 3.1 avoid to form dust cloud

In the operation area should avoid dust deposit, do not make dust piles up everywhere, perhaps make deposit dust cannot fly upwards, the spread inside the space with respect to short of lower explosion limit.

3.2 avoid to form ignition source

Above all, dust place should avoid the contact of bright fire and dust stoutly, be like forbidden smoking, the dust; all round is swept before soldering next, the scintilla; that the place that there is combustible on industry wants those who avoid all likelihoods to come from the generation such as steel, iron, admire, aluminous rust and ferruginous attrition, abrade, concussion in addition, control the temperature inside working environment conciously in dust place even, eliminate gas to wait to the synergism of dust as far as possible.

3.3 curb explode

When oring to explode even if explode in dust happening, adopt measure of a few technologies not to make explosive pressure farther expand, thereby the harm that detonate brings and loss are reduced the smallest.

　3.4 discharge explode

Discharge explodes is explosive hind can be inside cutty time brief or the container that will close so and facility are permanent the ground to the measure that does not have dangerous direction open, but the material that transgression should clear up before using is mordant or noxiousness. Pressure release can be a door that open, also can be to be exceeded to press the film that break through or piece. Discharge explodes film (piece) bursting properties is applicable should decide according to test result. The intensity design of explosive release container should regard affirmatory design as the foundation of pressure with release pressure.

　 3.5 lie between explode

Lie between explode curb can cooperate to explode inside an airtight space will or go out, also can pass blaze enough long conduit is passed other without defend in equipment. Lie between typically explode implement have: Firearm of extinguishing chemical block, rotary valve coming back, fragrance Tekesi is fast shut off valve.

　 4, epilogue

Anyhow, in all trades and professions, always have the place that flammability dust exists, should take dustproof step strictly, control high temperature and igneous cause, in order to put an end to the happening of dust explosion, ensure person reachs the safety of life property.

This is the dust explosion that manufacturer of our dust purifying device wants to explain main character and explosion proof measure, if you want to understand more the data about dust, or the common sense of the related side can pay close attention to us.