CN104492235B

CN104492235B - The method and apparatus for processing industrial waste gas

Info

Publication number: CN104492235B
Application number: CN201410776736.8A
Authority: CN
Inventors: 郭萌
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-12-17
Filing date: 2014-12-17
Publication date: 2017-04-05
Anticipated expiration: 2034-12-17
Also published as: CN104492235A

Abstract

Disclose a kind of method and apparatus for processing industrial waste gas.Methods described includes the material comprising volatile organic matter with ultraviolet light.Described device includes sewage collecting casing, and in the dirty water collecting tank body, four walls are mounted on sewage purification Burdick lamp, and it is 45 47 uw/cm that the Burdick lamp is C sections that can be in emitting ultraviolet light ripple wave band, 184.8 185.2nm of wavelength, and irradiation intensity²Ultraviolet emission lamp pipe.Methods described is suitable for large-scale industrial application, and than general T iO₂The photocatalysis efficiency of photocatalyst is much higher.

Description

The method and apparatus for processing industrial waste gas

Technical field

The present invention relates to a kind of method and apparatus for processing industrial waste gas, in particular by the C in ultraviolet light-wave band Section ultraviolet light（Wavelength 184.8-185.2nm）In specific modified TiO₂Industrial waste gas, trade effluent are processed in the presence of catalyst Method and apparatus.

Technical background

Industrial waste gas, trade effluent, especially volatile organic matter therein, are the important pollutant for causing haze, sternly Air quality, animal and plant growth and human health are have impact on again, and with very serious potential safety hazard.Various chemical industry, The industrial chemicals composition used in the factories such as fuel, oil, iron and steel, papermaking is various, causes trade effluent complicated component, often many Up to tens kinds even hundreds of kind, and and be divided into organic species and inorganic species, existing mode is often selected in factory Sewage centralized collection, then it is unified discharge, this super amount sewage discharge causes greatly destruction to surrounding, especially its In abnormal flavour and objectionable impurities, even more have a strong impact on the orthobiosiss of nearby residents, and currently without special UV-device pair Trade effluent is processed.It is mainly derived from petroleum chemical industry, plasthetics production, printing industry, insulant, machinery Major pollutants in the industries such as industry, surface anticorrosion antirust treatment, pharmaceuticals industry discharge waste gas.

Volatile organic matter has toxicity with stench mostly, and some also have carcinogen, such as vinyl chloride, benzene, toluene, Dimethylbenzene etc..And, most volatile organic matters are inflammable and explosive, and this brings many unsafe factors to enterprise's production.At present, Corresponding decree has all been promulgated in countries in the world, limits the discharge of the pollutant.The U.S.《Cleaning Air method》Emphasize several in future The discharge of 189 kinds of toxic chemicals 90% to be reduced in year, wherein 70% chemicals are VOCs；China in Enact and enforce within 1997《Discharge standard of air pollutants》, the discharge limitation of 33 kinds of pollutant is limited, including There are various volatile organic matters such as benzene, dimethylbenzene.

Conventional absorption method and absorption process be polluter from gas phase to solid phase/transfer of liquid phase, there is secondary pollution Problem；Purification biotechnology be microorganism under suitable environmental condition, by the use of the organic principle in waste gas as the energy maintain Vital movement, and Organic substance is decomposed into into carbon dioxide, water, inorganic salt etc., as the living environment of microorganism is special and locates Reason excessive cycle, is only achieved successfully in laboratory using biotechnology cleaning organic waste gas, is not almost obtained reality at present Apply on border；Catalytic burning method is catalytic efficiency highest VOCs treatment mode, can reach 100% purifying rate in theory, But processing waste gas using expensive metallic catalyst as consumptive material makes most of enterprise all receive such processing mode.

Photocatalyst has the advantages that protrusion in this respect.Photohole in photoactivation quasiconductor valence band, light Due to the strong oxidizing property of photohole, such as titanium dioxide, its current potential is 3.2 v to catalytic oxidation, higher than 2.07 v of ozone Many, the thorough degradable organic pollutant of energy is allowed to permineralization and generates carbon dioxide and water, and actor is not almost selected Property, so many can be made to be difficult to the pollutant mineralising (inorganization) degraded.Degradation process can be carried out at normal temperatures and pressures, it is not necessary to Addition chemical reagent, non-secondary pollution receive publicity the advantages of easy to operate.

CN101279250A discloses a kind of nonmetallic N doping one-dimentional structure of support type that can be used in excited by visible light TiO₂Photocatalyst and preparation method.With metal Ti pieces and concentrated alkali solution as primary raw material, with hydrothermal technique, by being acidified, Ion exchange and subsequent heat treatment obtain the nonmetallic N doping one-dimentional structure TiO of support type₂Visible light catalyst.It is characterized in that nitrogen Incorporation cause be catalyzed to visible ray produce absorption, absorbing wavelength red shift to 600nm；Catalyst inherently support type, solves Pellet type catalyst holds caducous shortcoming；Catalyst has one-dimentional structure, and specific surface area is big, and active site position is enriched, favorably In reinforcing reaction mass transfer process.The degraded to room air typical pollutant is realized, its activity is than granular nitrogen doping TiO₂ It is higher by 1.2-3.0 times.

CN2774623A discloses a kind of novel photocatalysis air purifier, is by blower fan, uviol lamp, loaded catalyst Bed and other attachment features are constituted.Photocatalyst coating in one group of be parallel to each other circular with breach or passage or In square spacer plate, tubular UV lamp through baffle assembly center, the breach or blow vent mutual dislocation of adjacent separator, dividing plate Outer, makes the photoreaction area of elongation is constituted in depurator cavity respectively against depurator inwall and ultraviolet lamp sleeve with interior edge Between, in air stream outlet section also added with anion generator and ozone decomposition catalyst.

It is empty that CN2809481 discloses the two-chamber type nano-photo catalytic that a kind of efficiency of light energy utilization is high, catalyst total surface area is big Gas purifier, it utilizes Nano semiconductor photocatalysis principle and characteristic ultraviolet, is carried by Burdick lamp, big pipe carrier and tubule Body, upper support reticulum constitute two tubular ring light-catalyzed reaction rooms with lower support reticulum.Tubule carrier be glass material, ultraviolet Can pass through, big pipe carrier is ceramic material.Ring-type mesh on upper and lower support reticulum makes dual-reaction chamber become series winding, has The comprehensive function of indoor air purification, sterilization and deodorization, it is adaptable to area is larger, the room that air quality requirements are high, hotel, guest The unproductive indoor place such as shop, office, meeting room and ward.

CN1799687A discloses a kind of supported titanium₂Photocatalyst and preparation method thereof, and adsorbed with high obtained in which Property photocatalytic water purifier.The supported titanium₂Photocatalyst loads 100- based on activated carbon fiber base, thereon 600mgTiO₂/ g activated carbon fibers, thickness 100-300nm TiO₂Thin film, specific surface area are 150～400m²/g.The catalyst can lead to Powder body cladding process, liquid phase deposition and the sol-gel process for crossing adhesive is obtained.Which remains original sky between activated carbon fiber silk Gap, can free in and out inside photocatalyst with fluid, and the advantage of the radiation-curable inside to photocatalyst of ultraviolet light.Using upper State supported titanium₂The photocatalytic water purifier of photocatalyst be in rectangular-shape, multiple photocatalysis for being fixed with above-mentioned catalyst In agent component insertion depurator cell body, the aerating system of bottom can gas mixing treatment fluid, reduce mass transfer and limit.The depurator can be effective Adsorption reaction substrate, promotes photocatalytic process so that the deep purifying for being particularly suited for micro polluted source is processed.

CN2529646A discloses a kind of photocatalysis air purifying device, by body, switch controlling device, air circulation dress Put, air filter and photocatalysis apparatus are constituted.Light-catalyzed reaction is provided with the passage that air flows through in air purifier Device, and photocatalytic reaction device is made up of the light-catalyzed reaction thin film and ultraviolet source that are attached on carrier.Photocatalysis are anti- Thin film is answered to be the titanium deoxid film prepared on carrier using magnetically controlled sputter method, carrier is glass, metal, ceramics or silk Net.When air passes through photocatalysis air cleaning device, the harmful substance in air such as formaldehyde, benzene etc. are in the presence of photocatalysis Generation is degraded, and generates nontoxic material, and the antibacterial in air is also removed by ultraviolet light, and therefore air is purified.Should Photocatalysis air purifying device can be used in family room, it is also possible to used in large space room.

CN2621799A discloses a kind of photocatalysis air purifier ', including purifier shell, depurator shell Photochemical room and wind cycling mechanism are provided with vivo, and catalyst and lamp tube light source, the fluorescent tube light are provided with the photochemical room housing Source is fixedly connected on the front of the photochemical room housing.When light source is changed, it is not necessary to by photochemical room from purifier shell Take out, as long as it is replaceable to open purifier shell.Furthermore it is possible to light source be adjusted according to the arrangement of catalyst, improve catalysis effect Really.Finally, the fluorescent tube of the invention is in convex, and irradiation is uniformly.

CN2565456A discloses a kind of high efficient optical catalyst air purifier, and the device is by taking from casing both sides Wind, using two groups of cross flow blowers, top, go out FENGDOU, three layers of photocatalyst filtering net and photocatalyst grizzly bar etc. with air guiding grid plate are tied Configuration formula, solves the problems, such as the contact surface of air velocity problems of liquid flow and air and photocatalyst body well；It is suitable by adopting Photocatalyst material, solve photocatalyst fixation problem on the carrier well；By the purple produced using ozone free Outside line lamp, solves ozone excessive problem well.The solution of these problems, improves air purification effect, improves air Depuration quality.

" metalloporphyrin/.gamma.-pyridinecarboxylic acid/titanium dioxide composite photocatalyst is prepared and its Photocatalytic Performance Study ", Luo Yun etc., Chinese Journal of Inorganic Chemistry, the 6th phase of volume 28, in June, 2012 are disclosed and have synthesized tetraphenylporphyrin and copper porphyrin and zinc protoporphyrin, are obtained Coordination compound ZnTPP, is prepared for the co-modified titanium dioxide composite photocatalyst-metalloporphyrin/different cigarette in metalloporphyrin .gamma.-pyridinecarboxylic acid Acid/titanium dioxide, have studied the effect of its photocatalytic degradation water pollutant.

WO2006074697A1 discloses a kind of cage photocatalyst as environmental purifying agent, wherein by nano-photo catalytic Agent is encapsulated in Calcium Carbonate shell, and the catalyst can be decomposed by photocatalysiss and be removed and be existed including volatile organic contaminant Interior harmful substance.

KR20030034590A discloses a kind of trapping and eliminates the method and apparatus of VOC in air, The device includes air intake, outlet, pretreatment chamber, photocatalyst reative cell, multiple guide plates, multiple uviol lamps, described to lead The surface-coated of corbel back slab has based on TiO₂Photocatalyst.

However, there is relatively costly major defect currently used for the photocatalysis method for processing organic pollution, be not suitable for In large-scale industrial application, and general T iO₂The photo-quantum efficiency and photocatalysis efficiency of photocatalyst is all than relatively low.

The content of the invention

To solve the above-mentioned problems in the prior art, the present inventor is through further investigation and many experiments, it is proposed that Following technical scheme：

On the one hand, the invention provides a kind of method for processing industrial waste gas, the method includes should with ultraviolet light Industrial waste gas.

The ultraviolet light is preferably the C sections in ultraviolet light-wave band, wavelength 184.8-185.2nm, and irradiation intensity For 45-47 uw/cm²。

Methods described may include to make industrial waste gas under ultraviolet light with supported modified TiO₂Catalyst is contacted.

Preferably, the industrial waste gas is from trade effluent and includes volatile organic matter.

In a preferred aspect, which is included under ultraviolet light makes industrial waste gas with supported modified TiO₂Catalyst connects Touch.

During volatile organic matter is processed, adding in the trade effluent has based on sewage weight meter 0.1- 2.0% supported modified TiO₂Catalyst.

In a particularly preferred method, the supported modified TiO of the present invention₂Catalyst is inorganic matters（Most preferably haydite） The modified TiO of load₂Catalyst.

The haydite can be obtained haydite by the following method：

（1）By trade effluent（Can be the industrial sewage of pending TREATMENT OF VOCs）Sludge in natural ring Dry in the sun in border is less than 10wt.% to moisture content, then carries out break process to which, and the mud granule that will be produced after crushing is transferred to In 460-550 DEG C in heating furnace（It is preferred that 500 DEG C）At a temperature of be dried 10-25 minutes（It is preferred that 20 minutes）, by dried original Material is transferred in ball mill, ball-milling treatment 10-40 minute（It is preferred that 30 minutes）, 500-700 rev/min of drum's speed of rotation（It is preferred that 600 Rev/min）；

（2）Add based on dried sludge weight meter 20-30 weight % in ball mill（It is preferred that 20 weight %）Calx Stone, 5-10 weight %（It is preferred that 5 weight %）Pore creating material, continue ball milling dry-mixed 5-10 minutes（It is preferred that 10 minutes）, then will mixing Raw material is transferred in dosing chamber, the suitable quantity of water that adds water stirring, pelletize, and particle diameter is in 5mm-15mm（It is preferred that 6mm）In the range of, it is then natural Dry；

（3）Shot-like particle after drying is transferred in heating furnace, at 550 DEG C -650 DEG C（It is preferred that 600 DEG C）At a temperature of burn Knot 20-40 minutes（It is preferred that 30 minutes）, room temperature is naturally cooled to, haydite finished product is obtained final product.

The pore creating material can be selected from one or more in Colophonium, sawdust, polystyrene, straw, paper pulp and rice husk.It is excellent Select Colophonium, sawdust and polystyrene.More preferably from the polystyrene of waste plastics such as building envelopes warming plate such that it is able to more It is advantageously carried out twice laid.If cost is not the principal element for considering, it may be preferred to Colophonium and polyamines or polyacid.Most Preferably, the solid infusion of 1-5 weight % can also be added（Based on dried sludge weight meter）, the solid infusion preferably tool There is chemical formula RCNHCH₂The amide substance of OH, it was unexpectedly found that the solid infusion of this amide-type can be with the pore creating material （It is preferred that Colophonium）Generation synergism so that the porosity of generation is stable and haydite intensity is higher, such as haydite intensity can be with Than not using amide-type, infusion improves 20-40% admittedly.

The above-mentioned sludge of the present invention can come from trade effluent and further process what is obtained Jing after removing volatile organic matter Sludge.The processing method can be the conventional sewage processing method of this area.By using the sludge of trade effluent, can be with Garbage is made to obtain further recycling.

The inventors discovered that, the surface of obtained haydite has many holes and comparison is regular, with general inorganic carrier for example Bentonite is compared, can be with TiO₂With reference to it is more firm, in addition the proportion of the haydite be 0.8-1.0g/cm³, the ratio with water It is closer to again, easily suspends in water, the intensity of illumination to catalyst can be effectively increased, so as to is greatly enhanced catalysis effect Really.

The modified TiO₂Catalyst can be the TiO of doping La, Pt and Fe₂Catalyst, wherein the gross weight based on catalyst Gauge, the doping of La is 0.1-0.5 weight %, and which is with La₂O₃Form is present；The doping of Fe be 0. 1-1.0 weight %, its with Fe₂O₃Form is present；The doping of Pt is 0.01-0.10 weight %, and which is present with simple substance or absorption oxygen form, is deposited on La₂O₃/ Fe₂O₃/TiO₂Surface, surplus is substantially TiO₂。

TiO₂Prepared using the conventional sol-gel process in this area, then impregnate the water soluble salt of La and Fe, drying is laggard Row high-temperature calcination（300-600℃）, obtain doping La₂O₃And Fe₂O₃TiO₂Catalyst, i.e. La₂O₃/ Fe₂O₃/TiO₂, then lead to Photodeposition is crossed in La₂O₃/Fe₂O₃/TiO₂Surface deposits Pt.

The light deposition method can be as follows：By a certain amount of H₂PtCl₆· 6H₂O is dissolved in containing methanol and distillation The 1 of water:4（Volume ratio）In mixed solution, by La₂O₃/Fe₂O₃/TiO₂During catalyst adds the solution under stirring, adjust PH=about 3, is sufficiently mixed under magnetic stirring, and then suspension is irradiated 6-10h under ultraviolet light, after reaction terminates, is filtered, It is washed with deionized several times, uses AgNO₃Solution detects Cl^-Until producing without precipitation, 60-100 DEG C is dried 1-6h, obtains final product doping The TiO of La, Pt and Fe₂Catalyst.

Can be by obtained Pt/La₂O₃/Fe₂O₃/TiO₂Catalyst is placed in a certain amount of water, is sufficiently stirred for suspension is obtained, A certain amount of haydite above-mentioned by obtained in sludge is added in the suspension, continues stirring so that haydite Surface coating has catalyst Layer, then 1-5 hours are kept at 200-400 DEG C, obtain final product the modified TiO of haydite load₂Catalyst.Modified TiO₂Catalyst it is negative Carrying capacity is（Based on haydite and modified TiO₂The gross weight meter of catalyst）0.1 weight %-10.0 weight %, preferably 0.5 weight %-5.0 Weight %, more preferably 1.0 weight %-5.0 weight %.

The present inventor has found that through numerous studies La doping can improve the visible light catalysis activity of catalyst, 0.3 weight % La dopings can in 100 DEG C, the 60min basic most of vapor phase toluene and dimethylbenzene removed in pharmaceuticals industry sewage； The La of incorporation is with La₂O₃Formal distribution in TiO₂Surface, and Ti-O-La keys are formed, suppress titanium dioxide Anatase to golden red Stone phase in version, raising phase transition temperature, reduction crystallite dimension and increase specific surface area of catalyst, in addition La doping can improve TiO₂ In the absorption of visible region, catalyst ABSORPTION EDGE is made to move to long wave, it is assumed that the electron transition of the f orbitals of La is probably to urge The major reason that agent visible light activity is improved.

The incorporation of Pt reduces crystallite dimension and increases specific surface area of catalyst, while increased catalyst to ultraviolet The absorption of the 185nm wave band ultraviolet lights in D wave bands.

The codope of La, Fe suppresses TiO₂Crystal conversion and grain growth, strengthen composite photo absorption performance, carry The photocatalysis performance of the high catalyst.

185nm wave bands ultraviolet light in a preferred aspect, ultraviolet D wave bands is produced by ultraviolet emission lamp pipe.Institute It is by containing 6 wt.%-8 wt.% Na to state fluorescent tube₂Clear glass luminous tube made by the soda-lime-silica glass of O, the sodium calcium silicon glass Glass is included：

SiO₂	65-75wt.%
		Na₂O	6-8wt.%
CaO	5-15wt.%
		MgO	1-5wt.%
Al₂O₃	3-8wt.%
		K₂O	6-8wt.%
SO₃	0.01-0.20wt.%
		CeO₂	0.0010-0.0025wt.%
With Fe₂O₃Total ferrum of meter	0.01-0.08wt.%
		Redox ratio	Less than 0.40

The spectral quality that wherein glass is measured under 5.5 mm of thickness is as follows：

Using C.I.E. standard light sources " A " 100-200 nm wavelength（It is ultraviolet）In the range of measured with 2 ° of observers and be more than 90% absorbance.This is higher by least 20% than the ultraviolet wavelength transmitance of conventional soda-lime-silica glass.

On the other hand, the invention provides a kind of device for processing industrial waste gas, described comprising volatile organic matter Material is trade effluent, it is characterised in that described device includes sewage collecting casing, and in the dirty water collecting tank body, four walls are pacified Equipped with sewage purification Burdick lamp；The Burdick lamp be can be in emitting ultraviolet light ripple wave band C sections, for wavelength 184.8- 185.2nm and irradiation intensity are 45-47 uw/cm²Ultraviolet emission lamp pipe, fluorescent tube is by containing 6 wt.%-8 wt.% Na₂Clear glass luminous tube made by the soda-lime-silica glass of O；

Preferably, described device includes casing, waste gas purification lamp, lamp bracket track and controller, the two ends of described casing Air inlet and air outlet are had, described waste gas purification lamp and described lamp bracket track are installed in described casing, Described waste gas purification lamp is arranged on described lamp bracket track, and described controller is arranged on the outside of described casing, and with Waste gas purification lamp connects, and the waste gas purification lamp is above-mentioned Burdick lamp.

Described sewage collecting casing one end can be connected with cesspool, and described cesspool one end is connected with source of sewage；It is described The entrance point and the port of export of sewage collecting casing is equipped with defecator, and the screen area of the defecator is 500～ 1100cm², the mesh aperture of filter screen is 0.1-5.0mm.

The cesspool bottom is arranged can sedimentation tank, and anti-backflow lattice are provided between the cesspool and sedimentation tank Grid.

The sewage collecting casing other end can be provided with draining pump；Or, described waste gas purification lamp includes fluorescent tube, lamp Frame and ballast, described ballast and fluorescent tube are installed on the inside of described lamp bracket, described ballast and described fluorescent tube Connection, described ballast quantity are preferably equal with described fluorescent tube quantity；

Preferably, protecting film is coated with the outside of described fluorescent tube, described protecting film is anti-fading block media；

Preferably, described waste gas purification lamp and described lamp bracket number of tracks are equal, and minimum for one；

Preferably, described casing, waste gas purification lamp and lamp bracket track are high temperature resistant, high pressure resistant, uvioresistant and smelly The material of oxygen is made.

Description of the drawings

Fig. 1 is the structural representation of the device of the process industrial waste gas according to the present invention.

Fig. 2 is the waste gas purification modulated structure schematic diagram according to the present invention.

Specific embodiment：

Embodiment 1

Take 100g TiO₂, TiO₂It is prepared by the sol-gel process that this area can be adopted conventional（Obtain after Titanium alkoxides are hydrolyzed Colloidal sol 500 DEG C calcine 2 hours）, or commercially available from Aldrich-Sigma companies, then impregnate the nitric acid saline of La and Fe Solution, its concentration are 1.0mmol/L, and dip time is 1.0 hours, is then dried at 100 DEG C, then carries out 500 DEG C of high temperature Calcining, obtains doping La₂O₃And Fe₂O₃TiO₂Catalyst is La₂O₃/ Fe₂O₃/TiO₂, then by Photodeposition in La₂O₃/ Fe₂O₃/TiO₂Surface deposits Pt.

The light deposition method can be as follows：Take a certain amount of H₂PtCl₆· 6H₂O is dissolved in containing methanol and distillation The 1 of water:4（Volume ratio）In mixed solution, by La₂O₃/Fe₂O₃/TiO₂During catalyst adds the solution under stirring, adjust PH=3, is sufficiently mixed under magnetic stirring, and then suspension irradiates 8h under ultraviolet light, after reaction terminates, is filtered, is used deionization Water washing multipass, uses AgNO₃Solution detects Cl^-Until producing without precipitation, 80 DEG C are dried 3h, obtain final product the TiO of doping La, Pt and Fe₂ Catalyst, wherein the gross weight meter based on catalyst, the doping of La is 0.2 weight %, and which is with La₂O₃Form is present；Fe's mixes Miscellaneous amount is 0.5 weight %, and which is with Fe₂O₃Form is present；The doping of Pt is 0.02 weight %, and which is present with simple substance form, and deposits In La₂O₃/Fe₂O₃/TiO₂Surface.By obtained Pt/La₂O₃/Fe₂O₃/TiO₂Catalyst is placed in 5L water, is sufficiently stirred for system Suspension is obtained, the haydite by obtained in sludge is added in the suspension according to method as described above by 2kg, continue stirring so that pottery Grain Surface coating has catalyst layer, then is kept for 1 hour at 300 DEG C, obtains final product the modified TiO of haydite load₂Catalyst, is modified TiO₂The load capacity of catalyst is 4.5 weight %.

Embodiment 2

As shown in figure 1, a kind of industrial sewage purification device, including sewage collecting casing 3, in the sewage collecting casing 3 Four walls are mounted on sewage purification Burdick lamp 4；Described 3 one end of sewage collecting casing is connected with cesspool 2, the cesspool 2 One end is connected with source of sewage 1；2 bottom of the cesspool is provided with sedimentation tank 7, is provided between the cesspool 2 and sedimentation tank 7 Anti-backflow grid 6；3 other end of sewage collecting casing is provided with draining pump 5.

Its course of work is as follows：Sewage Jing source of sewage 1 enters cesspool 2, is precipitated in cesspool 2, and larger consolidates , into sedimentation tank 7, remaining sewage Jing cesspools 2 enter sewage collecting casing 3, collection tank for body pollution thing and particulate matter Jing precipitations Supported modified TiO prepared by the embodiment 1 of sewage weight 0.8% is incorporated as in 3₂Catalyst, the purple that Jing Burdick lamps 4 are produced Outside line is irradiated, and by the oxygen photodissociation in the sewage in sewage collecting casing 3 into ozone, ozone is mutually tied with the organic substance in sewage Close, the pollutant in sewage are decomposed and aoxidized.Sewage after purification pumps discharge by draining pump 5 so as to meet state Family's environmental protection tests standard.As shown in Fig. 2 waste gas purification lamp includes fluorescent tube 9, lamp bracket 10 and ballast 11, ballast 11 and fluorescent tube 9 are installed on the inside of lamp bracket 10, and ballast 11 is connected with fluorescent tube 9.

The trade effluent produced with certain pharmaceutical factory is tested, and the trade effluent contains toluene, using gas chromatogram to entering The toluene level of the sewage of mouth and outlet is detected that chromatograph is that 7890 II gas chromatograpies detection toluene concentration changes.Gas phase Chromatographic condition：Using capillary column（50m × 0.32mm × 0.5 μm, Shimadzu Corporation）, fid detector, 150 DEG C of detector temperature, 110 DEG C of column temperature, 130 DEG C of injector temperature.After testing, the photocatalytic activity of toluene（Clearance）For 82.5%.

Comparative example 1

Comparative example 1 is common unsupported non-modified TiO2 photocatalyst with the catalyst that differs only in of embodiment 2.Jing Detection, the photocatalytic activity of toluene is 52.5%.

Comparative example 2

Comparative example 2 is common potter's clay with the carrier for differing only in catalyst of embodiment 2.After testing, the light of toluene is urged It is 61.4% to change degradation rate.

By the contrast of the above results clearly as can be seen that the supported modified TiO of the present invention₂Catalyst significantly can be carried High photocatalysis efficiency, such effect are that those skilled in the art institute is unforeseeable.

This written description discloses the present invention using example, including optimal mode, and also enables those skilled in the art Manufacture and using the present invention.The present invention can patentable scope be defined by the claims, and this area skill can be included Other examples that art personnel expect.If this other examples have the structural elements of literal language not different from claims Element, or if this other examples include equivalent structure element of the literal language without substantial differences with claims, Then this other examples are intended within the scope of claims.In the case where inconsistent degree is not resulted in, by reference to To be incorporated herein in place of all references of reference herein.

Claims

1. it is a kind of process industrial waste gas method, it is characterised in that：

The method includes that with industrial waste gas described in ultraviolet light the industrial waste gas is from trade effluent and includes volatility Organic substance；Wherein described ultraviolet light is that the C sections in ultraviolet light-wave band, wavelength 184.8-185.2nm, and irradiation intensity are 45-47 uw/cm ²；

And be included under ultraviolet light and make industrial waste gas with supported modified TiO₂Catalyst is contacted；Have volatility is processed During machine thing, the supported modified TiO having based on sewage weight meter 0.1-2.0% is added in trade effluent₂Catalyst；

The supported modified TiO₂Catalyst is the modified TiO of haydite load₂Catalyst；

The haydite is obtained haydite by the following method：

（1）By the sludge of trade effluent, in natural environment, dry in the sun is less than 10wt.% to moisture content, and broken place is then carried out to which Reason, the mud granule that will be produced after crushing are transferred in heating furnace at a temperature of 460-550 DEG C and are dried 10-25 minutes, will Dried raw material is transferred in ball mill, ball-milling treatment 10-40 minute, 500-700 rev/min of drum's speed of rotation；

（2）Add in ball mill based on the limestone of dried sludge weight meter 20-30 weight %, 5-10 weight % Pore creating material, continue ball milling dry-mixed 5-10 minutes, then mixed material be transferred in dosing chamber, plus suitable quantity of water stirring, make Then grain, particle diameter are dried in the range of 5mm-15mm naturally；

（3）Shot-like particle after drying is transferred in heating furnace, 20-40 minutes is sintered at a temperature of 550 DEG C -650 DEG C, Room temperature is naturally cooled to, haydite finished product is obtained final product.

2. method according to claim 1, it is characterised in that：185 nm wave band ultraviolet lights wherein in ultraviolet C wave band are by purple Outside line transmitting fluorescent tube is produced, wherein the fluorescent tube is by containing 6 wt.%-8 wt.% Na₂Made by the soda-lime-silica glass of O Clear glass luminous tube.