It how waste gas of spray paint room handles the effect is better how waste gas of spray paint room handles the effect

The harm that spray paint place produces is exceedingly great, the waste gas that resembles string of line of automatic spray paint, the lacquer that bake especially has wind force the characteristic with big, low density. The odour of spray paint contains benzene, toluene, xylene to wait, these VOC are very big to circumjacent environmental influence.

Do we need to know what to kind of material be contained inside this kind of waste gas?

Generally speaking, 3 kinds of main and harmful material contain inside the waste gas that discharges in the spray paint process of spray paint room:

1, oily lacquer: Carry the drip of paint particle; Lacquer of ability in swimming: Dissolved the atomic drip of paint;

2, be in in the gush in sky independently the paint in waste gas is atomic;

3, the peculiar smell of paint itself raw material below aerification condition, thinner (agent of solidify of normal temperature lacquer) the peculiar smell that send out, and the peculiar smell that releases in reaction and solidify process.

As environmental protection stricter and stricter, use a kind of any equipment to cannot have achieved environmental protection requirement alone, must take 2 step or 3 class remove dust purify except waste gas.

01

Spray paint room off-gas treatment method one: Water gush drenchs + adsorptive law

Spray paint waste gas produces spray course, liquid state paint forms content of pulverization dust grain to reach below baric action volatilize the organic harm content such as 3 benzene, concentration is higher, bead diameter is lesser, if without pretreatment, will jam very quickly activated carbon small hole, make activated carbon invalidation. After spray paint waste gas is cleaned through water shade ark, rise to clean degradation action very well to Qi Wu.

Waste gas enters water gush to drench off-gas treatment tower, classics is wet come back stream board after waste gas tower cleans processing further, bring fan to enter tower of active carbon adsorption through pressurization, organic gas is inside the bed by activated carbon adsorption, activated carbon tower gets used to Yu Daliu to measure low pH indicator organic waste gas, activated carbon uses a makings shape activated carbon, the area that compare a list (adsorptive area) be as high as 500-1500m2/g bigger than expressing an area, have very tall surface activated carbon and adsorptive capacity consequently.

The low density of eduction organic gas is in by adsorption its active apparently via purifying gas by outside headroom of the canal that discharge wind amounts to mark to discharge.

02

Spray paint room off-gas treatment method 2: Water gush drenchs + smooth catalysis + activated carbon is adsorptive

After spray paint waste gas is cleaned through water shade ark, rise to clean degradation action very well to Qi Wu, waste gas enters water gush to drench off-gas treatment tower, classics is wet come back stream board after waste gas tower cleans processing further, bring fan to enter facility of smooth catalysis deodorization through pressurization inside, fall via illuminate of high-energy ultraviolet ray, open loop of organic matter chemical bond mixes volatilize sex rupture wait for a variety of reaction (actinic reaction) , degradation change becomes CO2, the small element compound such as H2O, the oxygen in using air of illuminate of high-energy ultraviolet light generates ozone, ozone absorbs ultraviolet ray to generate oxygen freedom radical and oxygen, oxygen is free base with air medium vapor action creates hydroxyl freedom base, a kind of stronger oxidant, wait for organic waste gas with mellow, aldehyde, carboxylic acid, after the mineral such as water of complete oxygen melt into, carbon dioxide, enter activated carbon adsorber to undertake adsorption, after waste gas is purified, mark is amounted to to discharge in discharging atmosphere finally through conduit.

It is those who had achieved to purify the effect, after waste gas is decomposed via equipment of smooth catalysis deodorization, sequel needs to have time of reaction of 3~5 second conduit.

03

Spray paint room off-gas treatment method 3: Filter + catalytic combustion law

Waste gas filters mediumly through dust filter above all layer, purify dust particle, the gas after purifying is connected again place the tower of activated carbon adsorption that has beehive shape activated carbon (bed of activated carbon adsorption is used fully) , contact adequately with beehive shape activated carbon, use activated carbon to purify gas to the strong adsorptive sex of organic material, the gas after processing can amount to mark to discharge.

This equipment performance is steady, can achieve expectant result. Adsorptive bed reachs adsorptive saturation through the after moving meeting of period of time, desorption ～ catalytic combustion works automatically circularly after balancing a process to start 1 hour, right now system of open desorption second birth, undertake desorption second birth to activated carbon (do not need to change activated carbon) , the gas that desorption comes out makes the harmless gas such as the quantity of heat of carbon dioxide, water and part through combustion of catalytic combustion device, adsorption of a complete set of and catalytic combustion process implement automation by PLC.

Active carbon can use second birth of hot air desorption after adsorptive saturation. New investment uses active carbon after second birth, can condense chroma of organic waste gas 10-15 through controlling desorption process flow times, the combustion airplane unit of bed of catalysis of classics of desorption air current heats to be controlled to 300 ℃ , fall to light in activator action, catalytic combustion process purifies efficiency to be able to amount to 97% above, combustion have a youthful look becomes CO2 and H2O and release a large number of quantity of heat, this quantity of heat passes the heat exchanger inside catalytic combustion bed one part reoccupy will heat the high concentration waste gas that desorption gives, the come air outside increasing hot cell partly additionally does gas of active carbon desorption to use.