CN102861504A - Device for treating organic waste gas by applying photochemical technology - Google Patents
Device for treating organic waste gas by applying photochemical technology Download PDFInfo
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- CN102861504A CN102861504A CN2012103373461A CN201210337346A CN102861504A CN 102861504 A CN102861504 A CN 102861504A CN 2012103373461 A CN2012103373461 A CN 2012103373461A CN 201210337346 A CN201210337346 A CN 201210337346A CN 102861504 A CN102861504 A CN 102861504A
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- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
A device for treating organic waste gas by applying a photochemical technology comprises a high-strength security filter screen, a plasma reactor, a liquid mist humidifier, a catalytic reaction screen, an adsorption reaction screen, an ultraviolet lamp unit and an electric controller; the catalytic reaction screen and the adsorption reaction screen are subjected to the irradiation of the ultraviolet lamp unit; the organic waste gas is purified after being filtered by the high-strength filter screen, decomposed by the plasma reactor, humidified and cooled by the liquid mist humidifier, catalyzed by the catalytic reaction screen and adsorbed by the adsorption reaction screen; and the electric controller is connected to the plasma reactor and the ultraviolet lamp unit and used for controlling the starting and stopping of the plasma reactor and the ultraviolet lamp unit. The device for treating the organic waste gas by applying the photochemical technology can be used for efficiently treating industrial organic waste gas, does not produce secondary pollution residues and is lower in resource consumption and operation cost.
Description
Technical field
The present invention relates to a kind of device that photo chemistry technology is processed organic exhaust gas of using, be used for the organic exhaust gas that the purified industrial production process produces, belong to atmosphere and urban and rural residents living environment resist technology field.
Background technology
Atmosphere pollution is one of at present the most outstanding environmental problem of China.Wherein industrial waste gas is the important sources of atmosphere pollution.The most unmanageable in the industrial waste gas is exactly organic exhaust gas, mainly comprises various hydro carbons, alcohols, aldehydes, acids, ketone and amine etc.They are mainly derived from the waste gas that discharges in the petroleum and chemical industry industry production process, and characteristics are that quantity is larger, and the content of organics fluctuation is large, flammable, certain toxicity is arranged, and what have goes back foul smelling, and the discharging of CFC also can cause the destruction of ozone layer.The storage facility of petroleum and chemical industry factory and petroleum chemicals, printing and other industries relevant with petroleum and chemical industry, occasion and the combustion apparatus of use oil, petrochemicals, the various vehicles take oil product as fuel all are the sources of organic exhaust gas.
Organic exhaust gas can cause temporary and permanent lesion to organs and systems such as human body respiration, blood, livers after entering human body by respiratory tract and skin, and especially the polycyclic aromatic hydrocarbon type organic can make human body directly carcinogenic.These organic exhaust gas also can generate secondary pollution by the complicated reaction of some row under the effect at sunshine except causing direct atmosphere pollution, become one of main source of PM2.5.So the processing of organic exhaust gas is imperative with purification.
All the time, domestic and international many scholars are devoted to the research of VOCs pollution control technology, and traditional technology has absorption, condensation, film separation etc., and new technology has low temperature plasma, photochemical catalytic oxidation, biological treatment etc.
Absorption method is present most widely used, method that technology is the most ripe, and general first-selected active carbon has the advantages such as high adsorption capacity, raw material abundance as adsorbent.At present, adopt two sections recirculating fluidized bed absorption VOCs waste gas, stable, respond well.Active carbon is carried out the modifications such as oxidation, reduction and load compound, can further improve its adsorption capacity.But at present, the domestic cover mature and reliable that not yet forms, economic and practical active carbon regenerating technology, most active carbons are thrown aside as solid waste after using, and form secondary pollution, and the application of active carbon adsorption technology is restricted in recent years.
The condensation ratio juris is the vapour pressure of utilizing gaseous contaminant different, makes the target contaminant supersaturation that coagulation occur by regulating temperature and pressure, thereby realizes purifying and reclaiming.This technology has good treatment effect to partial organic substances, and is conducive to reclaim useful raw material.But this method energy consumption is larger, and is higher for the low-concentration organic exhaust gas processing cost, the rate of recovery is lower, thereby fails to be used widely.
The principle of membrane separation technique is to utilize each component of VOCs waste gas different rates by selective membrane under pressure promotes, and makes target contaminant obtain separating.This method is applicable to the VOCs treatment that treating capacity is less, concentration is higher.
The principle that bioanalysis is processed VOCs waste gas is by control adapt circumstance condition, cultivate also and tame out specific microorganism, and utilize pollutant in the waste gas as carbon source and the energy, keep its vital movement, simultaneously pollutant is converted into inorganic matter, thereby reaches the purpose of purification.Bioanalysis is processed waste gas, has good, the advantages such as operating cost is low, non-secondary pollution for the treatment of effect.But this method operation management is complicated, after shutting down system must the long period could the Recovery processing ability, floor space is large, thereby difficulty is applied to large-scale VOCs treatment engineering.
The principle of lower temperature plasma technology is to adopt the modes such as corona discharge, radio frequency discharge, obtains at normal temperatures and pressures a large amount of high energy electrons and O, OH isoreactivity particle, utilizes these active particles that VOCs waste gas is converted into CO
2, H
2Harmless or the low harmful substances such as O.Lower temperature plasma technology has that technique is simple, applicability is strong, easy operating, low power consumption and other advantages, has become the cutting edge technology of processing VOCs waste gas.
Photocatalysis oxidation technique has good disposal ability to waste water, is widely used, and utilizes photocatalysis oxidation technique to process VOCs waste gas and then belongs to new technique.A large amount of studies show that photocatalysis oxidation technique can be inorganic matter with the organic matter degradation in the waste gas just, thereby has larger using value under normal temperature, normal pressure.
Summary of the invention
Purpose of the present invention aims to provide a kind of device that photo chemistry technology is processed organic exhaust gas of using, and can efficiently process industrial organic exhaust gas, does not produce the secondary pollution residue, and resource consumption is few, and operating cost is lower.
For achieving the above object, a kind of device of using photo chemistry technology processing organic exhaust gas of the present invention, comprise high strength security personnel filter screen, plasma reactor, liquid mist humidifier, the catalytic reaction net, the adsorption reaction net, ultraviolet lamp group and electric controller, described catalytic reaction net and adsorption reaction net are accepted the irradiation of ultraviolet lamp group, organic exhaust gas is successively through high strength security personnel strainer filtering, plasma reactor decomposes, liquid mist humidifier humidifying cooling, the catalysis of catalytic reaction net, adsorption reaction net absorption after-purification, described electric controller connects plasma reactor and ultraviolet lamp group, the startup of control plasma reactor and ultraviolet lamp group and stopping.
The present invention also comprises air inlet flange and outlet air flange, described high strength security personnel filter screen, plasma reactor, liquid mist humidifier, catalytic reaction net, adsorption reaction net and ultraviolet lamp group all are arranged in the device structure main body, and described air inlet flange and outlet air flange are located at respectively the two ends of device structure main body.The best employing equipment of described device structure main body steel construction main body.
Described high strength security personnel filter screen can be made by composite fiber, and thickness is 5～10cm.Be mainly used in holding back inorganic matter and bulky grain oil droplet in the flue gas, protect the normal operation of follow-up components and parts.
Described plasma reactor can adopt corona discharge pulse or line-cartridge type corona discharge, is arranged in after the high strength security personnel filter screen, perpendicular to the air intake direction.During flue gas process plasma reactor, because the effect of forceful electric power corona, form a large amount of electronics, charged particle isoreactivity high energy particle, by bumping between these high energy particles and the organic matter and serial chemical reaction, organic substance decomposing is metastable harmless or low harmful substances the most at last.
Described liquid mist humidifier is arranged at the device structure main body top after the high strength security personnel filter screen, by connecting the running water pressure hydraulic piping or obtaining running water or pure water by the pumping pumping, form water smoke by atomizer, flue gas is lowered the temperature and humidification, flue gas behind the humidification is during by follow-up catalytic reaction net, hydrone in the flue gas constantly is that the catalyst of catalytic reaction net surface replenishes hydroxyl radical free radical, forms the catalytic activity that continues.
Described catalytic reaction net can adopt nickel to make, and immobilized on it have a Nano titanium dioxide photocatalyst.
Described adsorption reaction net can be made by the composite that contains active carbon.
Described catalytic reaction net and adsorption reaction net the best are tubular, and its central axes is parallel to the air intake direction.According to the difference for the treatment of capacity, described tubular catalytic reaction net is provided with one or more layers, and described tubular adsorption reaction net is provided with one deck, adjacent tubular catalytic reaction net spacing and or adjacent tubular catalytic reaction net and tubular adsorption reaction net spacing be 10～20cm.Described ultraviolet lamp group the best be arranged between the adjacent tubular catalytic reaction net and or adjacent tubular catalytic reaction net and tubular adsorption reaction net between, the axis of ultraviolet lamp group is parallel to the air intake direction.When organic exhaust gas is flowed through tubular catalytic reaction net, contact with the photocatalyst of catalytic reaction net surface, photocatalyst is under the ultraviolet ray irradiation that ultraviolet lamp group is sent, the surface forms electron hole pair and hydroxyl radical free radical, with the rapid oxidation Decomposition of the organic matter in the flue gas, form the stable innocuous substances such as carbon dioxide, water.After catalysis and photodissociation purification, residue organic pollution in the flue gas is finally held back by the online porous activated carbon medium of tubular adsorption reaction, and the active carbon after the absorption is under the ultraviolet ray irradiation that ultraviolet lamp group is sent, organic matter will progressively be decomposed, finally be converted into the stable inorganic things such as water, carbon dioxide, the porous activated carbon medium obtains regeneration.
The present invention mainly uses physics to hold back and the multiple effects such as absorption, low-temperature plasma, photoionization, ozone oxidation, free-radical oxidation, Hole oxidation.At first by high strength security personnel filter screen inorganic particle or the larger oil droplet of particle diameter that may carry secretly in the organic exhaust gas are held back, protected the normal operation of follow-up components and parts; Pretreated organic exhaust gas passes through first plasma reactor, obtains at normal temperatures and pressures a large amount of electronics and active charged particle, by the reaction of the interaction between active charged particle, makes the organic pollution in the flue gas be converted into harmless or low harmful substances; Flue gas is through liquid mist humidifier spray humidification afterwards; Then enter in the photochemical reaction zone from the tubular catalytic reaction net outside.Organic exhaust gas passes through tubular catalytic reaction net, ultraviolet lamp group, tubular adsorption reaction net successively, is discharged by outlet air flange finally by wind pipe.Wherein, organic exhaust gas is when passing through tubular catalytic reaction net surface, contact with the strong oxidative free radical of the online photocatalyst surface of catalytic reaction, by photoionization, ozone oxidation, free-radical oxidation, Hole oxidation effect the organic pollutant degradation in the waste gas is purified, the middle organic pollution that may cause atmosphere PM2.5 to pollute effectively removes smoke.The present invention has used low-temperature plasma purification techniques, photocatalysis technology, the associating of various active free radical and strong oxidizer is also used simultaneously, mutual synergy between them has played the comprehensive catalytic effect that multiplies each other, greatly accelerate photodissociation, oxidizing reaction rate, the purification work course of photodissociation, oxidation has increased substantially the efficient of organic pollution purified treatment less than 0.1 seconds.
In sum, the present invention has following technique effect:
1, adopted plasma reactor, use non-thermal plasma trap that organic exhaust gas is carried out preliminary treatment, form a large amount of electronics and high energy active particle by corona polarizing, effectively the larger molecular organics in the waste gas is decomposed, be conducive to the carrying out of follow-up serial degradation reaction.
2, adopted liquid mist humidifying device, the free radical source of continuous and effective also be provided for follow-up light-catalyzed reaction when organic exhaust gas is carried out humidifying cooling, guarantee catalytic reaction continue efficiently carry out.
3, adopted the catalytic reaction net, the catalytic reaction net is accepted the irradiation of ultraviolet lamp group, use photochemistry and catalyst catalysis technique, by the comprehensive function of ultraviolet ray and the immobilized body of catalyst, use the multiple effects such as photoionization, ozone oxidation, free-radical oxidation, Hole oxidation that organic exhaust gas is carried out fast, purifies thoroughly.
4, adopted the adsorption reaction net, the adsorption reaction net is accepted the irradiation of ultraviolet lamp group, utilization ultraviolet light photodissociation effect is decomposed thoroughly to the organic pollution of adsorption reaction net surface charcoal absorption, realizes the regeneration of active carbon, makes the adsorption reaction net continue efficiently to work.
5, adopt the tubular sandwich construction, cleverly catalysis-photodissociation-suction-operated has been integrated, used simultaneously liquid mist and ultraviolet effect, realized the sustainability of catalyst catalytic activity and the circular regeneration of active carbon.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is one deck tubular catalytic reaction net, one deck ultraviolet lamp group of Fig. 1, the sectional view of one deck tubular adsorption reaction net;
Fig. 3 is the sectional view of two layers of tubular catalytic reaction net, two layers of ultraviolet lamp group, one deck tubular adsorption reaction net;
Fig. 4 is the air flow direction figure of Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
As shown in Figures 1 to 4, a kind of device of using photo chemistry technology processing organic exhaust gas of present embodiment comprises air inlet flange 1, equipment steel construction main body 2, air outlet flange 3, high strength security personnel filter screen 4, plasma reactor 5, liquid mist humidifier 6, tubular catalytic reaction net 7, ultraviolet lamp group 8, tubular adsorption reaction net 9 and electric controller 10; Air inlet flange 1 and outlet air flange 2 are located at respectively the two ends of equipment steel construction main body 2, high strength security personnel filter screen 4, plasma reactor 5, liquid mist humidifier 6, tubular catalytic reaction net 7, ultraviolet lamp group 8 and tubular adsorption reaction net 9 all are arranged in the equipment steel construction main body 2, wherein, high strength security personnel filter screen 4 is made by stainless steel and composite fiber, be arranged on after the air inlet flange 1, thickness is 5～10cm; Plasma reactor 5 adopts corona discharge pulse or line-cartridge type corona discharge, is arranged in after the high strength security personnel filter screen 4, perpendicular to air intake direction 11; Liquid mist humidifier 6 is arranged at equipment steel construction main body 2 tops after the high strength security personnel filter screen, by connecting the running water pressure hydraulic piping or obtaining running water or pure water by the pumping pumping; Tubular catalytic reaction net 7 and tubular adsorption reaction net 9, its central axes is parallel to air intake direction 11, is fixed in the equipment steel construction main body 2.Such as Fig. 2, shown in Figure 3, difference according to treating capacity, the present invention is provided with one or more layers tubular catalytic reaction net 7 and one deck tubular adsorption reaction net 9, each layer catalysis/adsorption reaction net central axes, adjacent tubular catalytic reaction net spacing, adjacent tubular catalytic reaction net and tubular adsorption reaction net spacing are 10～20cm; Tubular catalytic reaction net 7 adopts nickel to make, and immobilized on it have a Nano titanium dioxide photocatalyst; Tubular adsorption reaction net 9 is made by the composite that contains active carbon; Ultraviolet lamp group 8 is arranged between the adjacent tubular catalytic reaction net 7, between the adjacent tubular catalytic reaction net 7 and tubular adsorption reaction net 8, the axis of ultraviolet lamp group 8 is parallel to air intake direction 11; Plasma reactor 5, ultraviolet lamp group 8 are connected with electric controller 10 by wire.
During use, organic exhaust gas enters in the equipment steel construction main body 2 by air inlet flange 1, and at first high strength security personnel filter screen 4 is held back inorganic matter and the bulky grain oil droplet in the flue gas, protects the normal operation of follow-up components and parts; Then flue gas enters plasma reactor 5, under the forceful electric power corona effect in plasma reactor 5, produce a large amount of electronics, charged particle isoreactivity high energy particle in the flue gas, by bumping between these high energy particles and the organic matter and serial chemical reaction, the most at last metastable harmless or low harmful substances of organic substance decomposing thing; Through behind the plasma reactor 5, organic exhaust gas passes through the mist cooling humidification by liquid mist humidifier 6; Flue gas behind the decreasing temperature and increasing humidity is entered in the photochemical reaction zone by tubular catalytic reaction net 7 outsides.Organic exhaust gas passes through tubular catalytic reaction net 7, ultraviolet lamp group 8, tubular adsorption reaction net 9 successively, is discharged by outlet air flange 3 finally by wind pipe.Wherein, when organic exhaust gas is flowed through tubular catalytic reaction net 7, contact with the catalyst on tubular catalysis net surface 7, catalyst is under the ultraviolet ray irradiation that ultraviolet lamp group 8 is sent, the surface forms electron hole pair and hydroxyl radical free radical, with the rapid oxidation Decomposition of the organic matter in the flue gas, form the stable innocuous substances such as carbon dioxide, water; Simultaneously ultraviolet lamp group 8 ultraviolet ray of sending has the effect of catalytic decomposition to the organic pollution in the flue gas, and under ultraviolet irradiation, the partial organic substances photodissociation becomes small-molecule substance; After catalysis and photodissociation purification, residue organic pollution in the flue gas is finally held back by the porous activated carbon medium on the tubular adsorption reaction net 9, and the active carbon after the absorption is under the ultraviolet ray irradiation that ultraviolet lamp group 8 is sent, organic matter will progressively be decomposed, finally be converted into the stable inorganic things such as water, carbon dioxide, the porous activated carbon medium obtains regeneration.Through photoionization, ozone oxidation, free-radical oxidation, the Hole oxidation effect of above-mentioned series, the purification of degrading up hill and dale of the organic pollution in the organic exhaust gas.
Claims (10)
1. use the device that photo chemistry technology is processed organic exhaust gas for one kind, it is characterized in that: comprise high strength security personnel filter screen (4), plasma reactor (5), liquid mist humidifier (6), catalytic reaction net (7), adsorption reaction net (9), ultraviolet lamp group (8) and electric controller (10), described catalytic reaction net (7) and adsorption reaction net (9) are accepted the irradiation of ultraviolet lamp group (8), organic exhaust gas filters through high strength security personnel's filter screens (4) successively, plasma reactor (5) decomposes, liquid mist humidifier (6) humidifying cooling, catalytic reaction net (7) catalysis, adsorption reaction net (9) absorption after-purification, described electric controller (10) connects plasma reactor (5) and ultraviolet lamp group (8).
2. the device of processing organic exhaust gas according to claim 1, it is characterized in that: comprise air inlet flange (1) and outlet air flange (3), described high strength security personnel filter screen (4), plasma reactor (5), liquid mist humidifier (6), catalytic reaction net (7), adsorption reaction net (9) and ultraviolet lamp group (8) all are arranged in the device structure main body, and described air inlet flange (1) and outlet air flange (3) are located at respectively the two ends of device structure main body.
3. the device of processing organic exhaust gas according to claim 2 is characterized in that: described device structure main body employing equipment steel construction main body (2).
4. according to claim 1 to the device of 3 each described processing organic exhaust gas, it is characterized in that: described high strength security personnel's filter screens (4) are made by composite fiber, and thickness is 5 ~ 10cm.
5. according to claim 1 to the device of 3 each described processing organic exhaust gas, it is characterized in that: described plasma reactor (5) adopts corona discharge pulse or line-cartridge type corona discharge, perpendicular to air intake direction (11).
6. according to claim 1 to the device of 3 each described processing organic exhaust gas, it is characterized in that: described catalytic reaction net (7) adopts nickel to make, and immobilized on it have a Nano titanium dioxide photocatalyst.
7. according to claim 1 to the device of 3 each described processing organic exhaust gas, it is characterized in that: described adsorption reaction net (9) is made by the composite that contains active carbon.
8. according to claim 1 to the device of 3 each described processing organic exhaust gas, it is characterized in that: described catalytic reaction net (7) and adsorption reaction net (9) are tubular, and its central axes is parallel to air intake direction (11).
9. the device of processing organic exhaust gas according to claim 8, it is characterized in that: described tubular catalytic reaction net (7) is provided with one or more layers, described tubular adsorption reaction net (9) is provided with one deck, adjacent tubular catalytic reaction net (7) spacing and or adjacent tubular catalytic reaction net (7) and tubular adsorption reaction net (9) spacing be 10 ~ 20cm.
10. the device of processing organic exhaust gas according to claim 9, it is characterized in that: described ultraviolet lamp group (8) be arranged between the adjacent tubular catalytic reaction net (7) and or adjacent tubular catalytic reaction net (7) and tubular adsorption reaction net (9) between, the axis of ultraviolet lamp group (8) is parallel to air intake direction (11).
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| CN105169911A (en) * | 2015-10-15 | 2015-12-23 | 苏州韵蓝环保科技有限公司 | Plasma waste gas sterilization and deacidification purifier |
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| CN108671719A (en) * | 2018-08-06 | 2018-10-19 | 嘉兴性天环保科技有限公司 | A kind of VOCs collection and treatment devices |
| CN109589713A (en) * | 2018-12-31 | 2019-04-09 | 佛山市云米电器科技有限公司 | A kind of non-crushing type smoke machine outlet system of air |
| CN109794106A (en) * | 2018-12-31 | 2019-05-24 | 佛山市云米电器科技有限公司 | A kind of circulating smoke machine filter screen for space environment in indoor and outdoor |
| CN110152481A (en) * | 2019-04-11 | 2019-08-23 | 南京大学环境规划设计研究院股份公司 | It is a kind of can in-situ regeneration VOCs adsorption photochemical catalysis and ozone cooperative purification method and device |
| CN110152481B (en) * | 2019-04-11 | 2023-10-27 | 南京大学环境规划设计研究院集团股份公司 | VOCs adsorption photocatalysis and ozone synergistic purification method and device capable of in-situ regeneration |
| CN114570172A (en) * | 2022-03-03 | 2022-06-03 | 张震渝 | Thermal power plant waste gas treatment equipment and treatment process |
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