Spray paint room off-gas treatment means

　　In the spray paint process of spray paint room, producing waste gas is inevitable, pollute an environment to damage human body health again already, undertake to these waste gas processing is indispensable so, the off-gas treatment means in spray paint room basically has the following kinds: Discontinuity law, water sparge law, combustion law, absorb law of oxidation of catalysis of low temperature of law, condensation law, plasma, adsorptive law. Among them, most what often use is water sparge law and adsorptive law.

One, water sparge law:

Application of water sparge law is wide, its principle is to pass water to spray in exhaust emission, water-solubility or big grain sedimentation, achieve the goal with contaminant, clean detached gas. Take spray booth of act of the water that do not have pump to be exemple, spray booth of shade of this water that do not have pump uses air revulsive carry water to form circular water screen. When the worker faces water shade to undertake to workpiece surface spray paint is operated, the air that contains Qi Wu is in after be being bumped with water act, cross water shade to enter air-water passageway, with the water in the passageway generation mixes strongly, after entering collect to enrage box, velocity of flow is reduced suddenly, air-water is detached, after air passes manger, be smoked by fan in device of activated carbon adsorption; And excessive cistern is flowed into after collect be been in by detached water enrages box assemble, water arrives from excessive cistern overflow on flashing board form water screen, shed backwater box, make in this process Qi Wu forms clinker, thereby content of grain of adsorptive purify paint. Classics investigation, the purify efficiency to paint grain content is processing system of water shade Qi Wu 70 ％ are controlled.

Mist of water shade lacquer still contains many grain substance in the spray paint waste gas after processing system processing, to prevent to jam follow-up activated carbon purifies establishment, need to carry installation fibre glass on the head to filter in spray booth farther to paint grain content purify purifies cotton. Fibre glass filters cotton also calls Qi Wu cotton of lacquer of net of lacquer of felt, block, block, fibre glass screen pack of fleeciness felt, paint, by the composition of successive monofilament fibre glass of high strenth, present adds a texture, catch it is good to lead tall, Qi Wu to isolate the effect; It is good to reduce performance, can maintain its exterior is changeless, its filter fiber benefit at storing Qi Wu dirt; Makings of filter of lacquer mist felt is green white dichromatic, green face is air with the wind face; Be able to bear or endure temperature is strong, can reach 100 ％ opposite temperature be able to bear or endure lukewarm sex, high temperature resistant amount to 170 ℃ .

2, adsorptive law:

The off-gas treatment kind that we can pass house of car spray paint below will introduce adsorptive standard, it is with room of car spray paint exemple, because the waste gas of generation of room of car spray paint is relatively special,be.

This kind of waste gas is paint kind spray waste gas, basically divide composition by 2, it is the Qi Wu of liquid state, the 2 VOC that are gaseous state. To mist of liquid state lacquer, need to use device of the mist that remove paint; But right not the VOC of dissolve water, industrial maturity technology still should be ” activated carbon is adsorptive + waste gas of combination of desorption of smooth catalysis oxidation purifies a system ” .

Activated carbon adsorption, it is a kind of common off-gas treatment method. Adsorptive Farley uses bath of porous activated carbon, silicon earth, anthracitic etc, adsorption of element of will organic gas arrives its surface, purify thereby. Good qualities: Purifying rate is high (activated carbon adsorption can amount to 99% above) , practical pervade, operate simple, investment is low. Defect: Systematic leeway is lost big, make specific power consumption taller, the saturation of sorbent nods difficult control, sorbent capacity is finite, moving dosage is taller.

Activated carbon is a kind of very admirable sorbent, it is to use all sorts of charcoal, fruit carapace and high grade coal to wait as raw material, undertake to raw material through physics and chemical method activation of broken, sift out, activator, full, drying is mixed choose wait for a series of working procedure to treatment is made and be become. Activated carbon has physisorption and chemical and adsorptive double character, all sorts of material in photograph of the adsorptive gas phase that can have a choice, fluid, in order to achieve decolour the purpose such as deodorization of purificatory, disinfection and decontamination extract. Law of activated carbon adsorption uses activated carbon to regard physisorption as the agent namely, the harmful material composition of the generation in electrostatic spray process, undertake concentrated in solid photograph surface, make waste gas gets depurative administering thereby. This adsorptive process is in solid photograph, the physical course that the interface between gas phase produces.

Activated carbon is divided again for grain shape and fiber shape two kinds, photograph comparing, stoma of grain shape activated carbon is even, outside dividing alveolus, still have the 0.5 large hole to 5 accept rice, the area that compare a list is commonly 600 to 1600 make the same score meter of every gram, be wanted by processing gas from extroversion inner diffusion, pass a space longer, so adsorptive desorption all slower, course oxidation is treated the adsorptive capability of grain shape activated carbon is stronger. And stoma of fiber shape activated carbon is lesser, the area that compare a list is large, it is to rely on the mutual gravitation between the element to produce adsorption, do not produce chemical reaction each other, it is process of a kind of physisorption.

When the waste gas that device of activated carbon adsorption is the generation in electrostatic spray process passes activated carbon layer, hydrocarbon by activated carbon adsorption, arrange the gas after purifying processing the facility that goes in atmosphere. Small-sized and adsorptive device uses jar of perpendicular type adsorption commonly; Large and adsorptive device uses jar of horizontal type adsorption commonly.

We see the dimension of the device of activated carbon adsorption that middling of spray paint room uses and structure again, to device of cylinder type adsorption, its diameter is 1 ～ 2m. To device of perpendicular type adsorption, its height and diameter are roughly equal, the layer is its activated carbon high 1.5 ～ 1.8m.

To device of horizontal type adsorption, activated carbon layer is 0.3 ～ 0.8m high, can be monolayer or multilayer, gas is 0.3 ～ 0.6m/s through speed; If the layer is tall,increase, adsorptive capacity and dynamical expense increase accordingly. As the adsorptive process of activated carbon, equipment obstruction subsequently slow increase, when activated carbon adsorption is saturated, equipment obstruction reachs **** value, the equipment of after this purifies efficiency to be lost basically. For this, the system installs a difference pressing to survey a system in place of a place with a draught of equipment pass in and out, to the waste gas pressure of this unit imports and exports difference undertakes detect and indication, change in time activated carbon.

Because activated carbon is had can reborn characteristic, in activated carbon dosage chroma of big, waste gas reachs activated carbon adsorption high below the circumstance with saturated short time, can use device of activated carbon desorption to undertake to activated carbon second birth is used circularly (desorption medium can use steam) . Device of desorption of use activated carbon not only OK and managing moving cost, and can undertake reclaiming to adsorptive waste gas, avoided 2 times to pollute at the same time. Reclaiming below the circumstance of solvent, still can choose device of second birth of activated carbon of smooth catalysis oxidation to undertake to activated carbon second birth is used circularly. Room of car spray paint off-gas treatment the material of accelerant of Na Miguang catalysis in this equipment core (GC-100) be after drawing light energy one kind, the material that catalysis reacts can produce in its surface, its function is similar to floral chlorophyll. The material of accelerant of smooth catalysis of ultraviolet light illuminate that grows when specific offer metric wave (GC-100) when, oxidation of catalysis of third contact of its surface hair is reductive reaction. Form carbon dioxide and water finally.

Besides above outside introductory method, we see spray paint room again the off-gas treatment means of a few other in off-gas treatment.

3, break off a law: It is to pass special type to filter material, buy is put at course of the platoon outside waste gas, via machine discontinuity, attain administrative result thereby. Good qualities: Tall to obedience of Qi Wu management, without skill requirement, operate austere. Defect: Poorer to the purify expression of organic matter.

4, combustion law: Use heat the essentials of high temperature, organic waste gas direct combustion dangers, in order to reach the goal that waste gas purifies.

Advantage: Purify obedience tall, can amount to 95% above. Defect: Necessary and much heat energy, like toluene direct combustion needs 800 degrees or so, waste a large number of the sources of energy necessarily, pollution is caused easily also 2 times below high temperature.

5, absorb a law: Use draw fluid and response of each other of useless gas phase, the harmful material dissolve that makes waste gas medium is entered in absorbing fluid, make waste gas is able to purify thereby. Absorb fluid to deal with separately punishment.

Advantage: Investment is small, moving expenditure is low, operate simple. Defect: Deal with condemnatory obedience is low, not firm, purify obedience not tall, it is about 50% , inaccessible environmental protection asks, organic to low pH indicator waste gas, have pollution 2 times.

6, condensation law: Drop in temperature through condensation, when temperature when the solid node under harmful material, liquid state of gaseous harmful material translate into, come out dispersedly from inside atmosphere, purify thereby. Good qualities: Move firm, purify obedience tall. Defect: Investment is larger, reach to the circumstance to operating personnel asks taller, and specific power consumption is too big, moving expense is high.

Product technology principle

(1) , use irradiation of tailor-made beam of light of high-energy UV ultraviolet ray organic waste gas and effluvial gas, splitting decomposition the molecular key of organic waste gas and effluvial gas, the instant is opened rupture aether of sulfur of alcohol of sulfur of carbon of hydrogen of ammonia, vulcanization, 2 vulcanization, armour, armour, 2 armour amine of 2 sulfur, 3 armour, styrene and VOC kind, benzene, toluene, molecular catenary structure, degradation change is content of small element chemistry, wait for material like carbon dioxide and water.

(2) , the oxygen element in using high-energy ozone to decompose air produces free oxygen, namely active oxygen, because oxygen place carries free to losing an electron lopsided need to be united in wedlock with oxygen element so, produce ozone then, make young member of the contaminant element of free condition and synthesis of ozone oxidation knot harmless or small the compound that kill. Wait like CO2, H2O. UV+O2 → O-+O* (active oxygen) O+O2 → O3 (ozone) .

(3) , use oxidation of tailor-made catalysis of TiO2 smooth accelerant to filter cotton, below the illuminate of U ultraviolet light, undertake to air catalysis reacts cooperating with, produce a large number of ozone, undertake to organic waste gas and evil smelly gas catalysis oxidizes to decompose reaction in coordination, make its degradation changes organic waste gas and effluvial gas material into small element compound, water and carbon dioxide, achieve deodorization and the goal that exterminate a bacterium thereby.

Product function is summed up

One, efficient divide effluvial: Can efficient purify is volatile organic matter (VOC) , gas of hydrogen of mineral, vulcanization, ammonia, sulfur is mellow kind wait for main contaminant, and all sorts of evil stinks, deodorization efficiency can amount to 99.9% above, the effluvial pollutant discharge standard that deodorization effect exceeds a country to was promulgated 1993 greatly (GB14554-93) .

2, need not add any substance: Need to set the corresponding conduit that discharge wind and platoon pneumatic force only, make effluvial gas connects this equipment to undertake deodorization is decomposed purify, need not add any material to share chemical reaction.

3, adaptability is strong: Can get used to high concentration, atmosphere is measured, the deodorization of material of different and effluvial gas purifies processing, but everyday 24 hours of successive jobs, moving stability is reliable.

4, moving cost is low: This equipment does not have any mechanical movements, without noise, person specially assigned for a task manages and need not safeguard daily, require regular inspection only, this equipment specific power consumption is low, (every handle 1000 stere / hour, only bad news report makes an appointment with 0.1 degrees of electric energy) , equipment wind block is extremely low <30pa, but specific power consumption of the managing and many dynamic that discharge wind.

5, need not pretreatment: Effluvial gas need not undertake special pretreatment, if add lukewarm, add wet etc, temperature of facility work environment is in centigrade – 30 ℃ – between 65 ℃ , humidity all can work normally between 40%-95% .

6, equipment covers an area of an area small, self-prossessed light: Agree with decorate compact, field to wait for special condition narrowly, equipment covers an area of area <1 square metre / processing 10000m3/h wind force.

7, data of high grade import makes: Performance of fire prevention, anticorrosion is high, performance is steady, service life is long.