CN1319600C - Plant and method for processing low-concentration high-capacity foul gas - Google Patents
Plant and method for processing low-concentration high-capacity foul gas Download PDFInfo
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- CN1319600C CN1319600C CNB2005100302784A CN200510030278A CN1319600C CN 1319600 C CN1319600 C CN 1319600C CN B2005100302784 A CNB2005100302784 A CN B2005100302784A CN 200510030278 A CN200510030278 A CN 200510030278A CN 1319600 C CN1319600 C CN 1319600C
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- activated carbon
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Abstract
The present invention belongs to the technical field of malodorous gas treatment, particularly to a device and a method which are used for treating malodorous gas by combining 172 nm quasimolecule ultraviolet light technology with a honeycomb activated carbon absoption-catalytic oxidation bed organically. The device is formed by connecting a filter screen, a protolysis device, a honeycomb activated carbon bed and a blower in sequence, wherein the protolysis device adopts a 172m quasimolecule ultraviolet lamp and presents a hollow cylindrical structure. Through the absorbing function of the honeycomb activated carbon, base groups with high activity, such as ozone, HO., HO2., etc. which are generated by protolysis, malodorous substances which are decomposed incompletely and oxygen in gas are absorbed and accumulated in activated carbon cellular structures, and the medium function and the catalytic oxidation function of the activated carbon bed are used for oxidizing and decomposing the malodorous substances. The present invention can treat malodorous gas with low deepness and large wind amount at high efficiency on a large scale.
Description
Technical field
The invention belongs to technical field of waste gas treatment, is a kind of novel foul gas blood processor and method that Excimer UV light technology and cellular activated carbon absorption-catalytic oxidation bed are organically combined.
Background technology
Stench more and more receives publicity as one of environmental hazard, is that the resident complains one of maximum environmental problem after noise.Therefore it is very necessary to seek the stench of a kind of practical economical and practical again method in controling environment.Stench is to cause offending sensation and be harmful to a class public hazards gaseous contamination material of health by the organum olfactorium perception that air dielectric acts on the people, mostly be carbon containing, hydrogen, oxygen, sulfur or nitrogen compound, as hydrogen sulfide, thio-alcohol, styrene, trimethylamine and organic acid etc.Odorant also has bigger toxicity, and very easily combines with airborne moisture, grit, enters human body with respiratory system, the aggravation human health damage.Its source is widely distributed, as places such as Biohazard Waste Disposal (field), petrochemical plant, sewage treatment plant, feedstuff and fertilizer processing factory, livestock products farm, sewage pumping station, chemical fibre factory and public lavatory, feces transfer stations.The processing of the big air quantity foul gas of the control of foul gas, especially low concentration (less than 100ppm) has become one of environmental problem that some areas at present need to be resolved hurrily.
In existing foul gas processing method, the light technology is simple and convenient because of it, purification efficiency is high, decomposition rate is fast, more and more comes into one's own.Photosensitive semiconductor catalytic oxidation or nano-metal-oxide photocatalysis are the focuses of attention in recent years, but the degradation efficiency of this technology is controlled by the interfacial diffusion speed of odorant and catalyst surface, therefore be difficult to heavy industrialization and use, be confined to the little air quantity trial period more at present.Aspect direct sunshine decomposition odorant, the someone adopts the low pressure mercury lamp that can launch 254nm or 185nm to be used for foul gas and administers, because considerable odorant is (as CS
2, H
2S etc.) do not absorb or trace absorbs the 254nm photon, and the 254nm photon energy is not high, so the 254nm ultraviolet Technology is difficult to promote the use of, is used for sterilization and sterilization mostly; Although 185nm optical processing stench is effective, the 185nm luminous efficiency of low pressure mercury lamp is generally less than 7% (being generally about 5%), and the low pressure mercury lamp single-machine capacity is low, is generally less than 80W, and is huge with the lamp amount when being used to handle big air quantity gas; In addition, in the low pressure mercury lamp life-span short (being generally less than 8000h), fluorescent tube is changed the frequency height.
Studies show that, nearly all odorant can both well absorb the ultraviolet light of 172nm wavelength, the 172nm photon energy is 7.2eV (being roughly equal to 695kJ/mol), and the fracture bond energy of odorant molecule is generally less than 5eV, therefore can eliminate stink by being decomposed behind the odorant molecule absorption 172nm photon.The 172nm photon is produced by the xenon excimer generator, quasi-molecule is to produce under special gas discharge condition, and excited state molecule that can not stable existence under usual conditions, when xenon excimer will give off the extremely strong 172nm photon of energy when excited state is got back to the less state of energy.
When utilizing the big air quantity foul gas of 172nm treatment with ultraviolet light low concentration to handle, mainly there are the following problems:
1. common quasi-molecule ultraviolet source luminous efficiency is low, and the 172nm luminous efficiency is generally less than 10%, is difficult to large-scale promotion and uses;
2. common quasi-molecule ultraviolet source single-machine capacity is low, is generally less than 100W, and when being used to handle the atm number foul gas, installation amount is huge;
3. contain a large amount of ozone in the tail gas after the 172nm treatment with ultraviolet light, fail to make full use of, cause secondary pollution;
4. electrode directly contacts with processed gas, has etching problem.
The purpose of this Technology is to provide the improvement technology of a kind of superpower excimer light source of the 172nm of emission photon in conjunction with the big air quantity foul waste gas of cellular activated carbon absorption-catalytic oxidation bed processing low concentration.
Summary of the invention
The objective of the invention is to propose that a kind of energy is extensive, high efficiency is handled low concentration, the apparatus and method of big air quantity foul gas.
The device of the low concentration that the present invention proposes, big air quantity foul gas is connected to form successively by drainage screen, photolysis device, cellular activated carbon bed and blower fan, as shown in Figure 1.Wherein, the photolysis device adopts 172nm Excimer UV lamp, and its structure as shown in Figure 2.This lamp is made up of quartz socket tube 1, external electrode 2, quartz burner 3 and interior electrode 4, and wherein, quartz burner 3 is concentric with quartz socket tube, and external electrode 2 is between quartz burner 3 and quartz socket tube 1, and interior electrode 4 is in quartz burner 3 inboards, and the integral body of lamp is hollow cylinder.To penetrating all around, the ultraviolet light effective radiating area is greater than 1m from lamp tube wall for 172nm light
2, 1-2m for example
2Inside and outside electrode can adopt stainless steel material, and bubbling air between quartzy pipe box 1 and the external electrode 2 avoids the corrosivity composition to enter.Compare the 172nm light radiation efficient height (, pressing energy meter) of system, power big (reaching more than the 900W), long service life (greater than 1600 hours) greater than 50% with common Excimer lamp.Adopt cylinder design, be convenient to arrange, and help fully contacting of photon and gas.
Operation principle is: 172nm Excimer UV lamp places in the middle of the reactor, foul gas enters from space between external electrode quartz socket tube and the reactor wall, when foul gas is flowed through reaction zone, under the 172nm photon bombardment, odorant just decomposes and becomes various active particles, these active particles then with O
2Reaction generates CO
2, H
2Innocuous substances such as O, the N in the odorant molecule, S element finally are converted into NO
2And SO
2, low hazardous substance such as simple substance S because process object is a low concentration gas, the therefore NO that produces
2And SO
2Measure also less relatively.In addition, airborne O
2And H
2O also can produce oxygen atom, ozone, HO and HO under the effect of 172nm photon
2Contour active group, these groups all have high reaction activity and high, and a part of odorant also can react with these active groups, promotes stink to eliminate.
Among the present invention, the cellular activated carbon bed is a kind of cellular activated carbon absorption-catalytic oxidation bed, and it adopts cellular activated carbon as packed layer, cellular activated carbon is formed as follows by weight percentage: Powdered Activated Carbon 80-88%, clay 8-12%, metal-oxide 5-7%, total amount satisfies 100%.The aperture size is the mm of (1-1.8) mm * (1-1.8), and effective area of orifice is 800-1200mm
2Its structure is seen shown in Figure 3.
This absorption-oxidation bed adopts cellular activated carbon as packed layer, and gas flows through from slit, cellular activated carbon aperture, compares with the granular active carbon layer, and air resistance reduces greatly, and gas component contacts more abundant with active carbon.Because active carbon energy active adsorption malodor components, O
2And ozone, O atom isoreactivity group, make the enrichment in the activated carbon capillary structure of these reactants, strengthened contacting between odorant and oxygen, ozone, the O atom isoreactivity group, promoted the degraded of odorant.Because there is not the absorption saturation problem in the active-carbon bed effect of only playing reaction interface (or media) and catalytic oxidation, need not periodic replacement, but life-time service.
Operation principle: the high activity group O that contains oxygen, undecomposed odorant completely and generation in the waste gas after the 172nm treatment with ultraviolet light
3, oxygen atom, HO etc., when gas is flowed through the cellular activated carbon bed,, these materials are adsorbed in the microcellular structure of active carbon, because odorant and O by active carbon good adsorption performance
2, O
3Equivalance is got together, and fully contact oxidation reaction takes place the odorant branch is taken off, and product is replied the efficient absorption and the catalytic oxidation ability of active carbon by desorption desorption from the activated carbon capillary structure, and active carbon is recycled.
Among the present invention, the mesh of drainage screen is generally the 90-100 order, is used for particulate matters such as filtering gas dust.Blower fan 4 makes reaction unit be in negative pressure state in the reaction unit back, avoids foul gas to leak.
The method that the present invention utilizes above-mentioned blood processor that foul gas is handled is as follows:
Foul gas is collected the back and is removed 5 through filter screen earlier, particulate matters such as dust, enter photolysis device 6 then, the control gas flow rate is 0.3-0.6m/s, at this 172nm photon bombardment odorant that utilizes Excimer UV light generation systems to produce, and the generation series reaction makes the odorant decomposition and is converted into harmless or other odorless material, O
2Reach the O that produces in a small amount of unreacted odorant, the course of reaction
3, O and HO enter cellular activated carbon bed 7, the control gas flow rate is 0.8-1.2m/s, by activated carbon adsorption and continue to react; Absorption through active carbon is gathered and catalysed oxidn, and the oxidized decomposition of odorant finally reaches and eliminates the stench purpose.Blower fan 8 is placed on the reaction unit back, can guarantee that reaction unit is in negative pressure state, avoids foul gas to leak.
Description of drawings
Fig. 1 is apparatus of the present invention and schematic flow sheet.
Fig. 2 is a 172nm Excimer UV modulated structure diagram.Wherein Fig. 2 (a) is for overlooking diagram, and Fig. 2 (b) is a three-dimensional icon.
Fig. 3 is the cellular activated carbon diagram.Wherein, Fig. 3 (a) is a vertical view, and Fig. 3 (b) is a three-dimensional icon.
Number in the figure: 1 is quartz socket tube, and 2 is external electrode, and 3 is quartz burner, and 4 is interior electrode, and 5 is drainage screen, and 6 is the photolysis device, and 7 is the cellular activated carbon bed, and 8 is blower fan.
The specific embodiment
With tolerance 10000m
3The foul gas of/h, concentration 100ppm is that example illustrates device of the present invention and each technique unit parameter:
1.. drainage screen: 100 orders
2.. the photolysis device: adopt 172nm Excimer UV lamp, the structure of lamp is hollow cylinder as previously mentioned.Single group diameter 400mm * high 1000mm, installed power 900W, adds up to total installed capacity 36kW by totally 40 groups.The control gas flow rate is 0.5m/s.
3.. the cellular activated carbon bed: single group leader 2000mm * wide 2000mm * high 1500mm, adds up to cellular activated carbon loadings 8m by totally 2 groups
3Active carbon composition (by weight) is: Powdered Activated Carbon 85%, and clay 10%, all the other are the oxide of manganese or ferrum for metal-oxide, the control gas flow rate is 1m/s.
4.. blower fan: match power 11kW.
Adding up to every cubic metre of foul gas power consumption of processing is 4.7W, and treatment effect is very good.
Claims (3)
1, a kind of processing low depth, the device of big air quantity foul gas, it is characterized in that by drainage screen, the photolysis device, cellular activated carbon bed and blower fan connect to form successively, wherein, the photolysis device adopts 172nm Excimer UV lamp, this lamp is by quartz socket tube (1), external electrode (2), quartz burner (3) and interior electrode (4) are formed from outside to inside successively, wherein, quartz burner (3) is concentric with quartz socket tube (1), external electrode (2) is between quartz burner (3) and quartz socket tube (1), interior electrode (4) is in quartz burner (3) inboard, and the integral body of lamp is hollow cylinder; The cellular activated carbon bed adopts cellular activated carbon as packed layer, cellular activated carbon is formed as follows by weight percentage: Powdered Activated Carbon 80-88%, clay 8-12%, metal-oxide 4-7%, total amount satisfies 100%, the aperture size is the mm of (1-1.8) mm * (1-1.8), and effective area of orifice is 800-1200mm
2The mesh of drainage screen is the 90-100 order, and blower fan (4) is in the reaction unit back.
2, device according to claim 1 is characterized in that described external electrode (2) and interior electrode (4) adopt rustless steel.
3, a kind of method of utilizing the described device of claim 1 to handle low depth, big air quantity foul gas, it is characterized in that concrete steps are as follows: foul gas is collected the back and is removed (5) through filter screen earlier, particulate matters such as dust, enter photolysis device (6) then, the control gas flow rate is 0.3-0.6m/s, at this 172nm photon bombardment odorant that utilizes Excimer UV light generation systems to produce, and the generation series reaction makes the odorant decomposition and is converted into harmless or other odorless material, O
2Reach the O that produces in a small amount of unreacted odorant, the course of reaction
3, O and HO enter cellular activated carbon bed (7), the control gas flow rate is 0.8-1.2m/s, by activated carbon adsorption and continue to react; Absorption through active carbon is gathered and catalysed oxidn, and the oxidized decomposition of odorant finally reaches and eliminates the stench purpose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100302784A CN1319600C (en) | 2005-09-30 | 2005-09-30 | Plant and method for processing low-concentration high-capacity foul gas |
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|---|---|---|---|
| CNB2005100302784A CN1319600C (en) | 2005-09-30 | 2005-09-30 | Plant and method for processing low-concentration high-capacity foul gas |
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|---|---|
| CN1762501A CN1762501A (en) | 2006-04-26 |
| CN1319600C true CN1319600C (en) | 2007-06-06 |
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| CNB2005100302784A Expired - Fee Related CN1319600C (en) | 2005-09-30 | 2005-09-30 | Plant and method for processing low-concentration high-capacity foul gas |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5790763B2 (en) * | 2011-07-08 | 2015-10-07 | 三菱電機株式会社 | Air cleaner |
| CN104474886B (en) * | 2013-03-20 | 2016-08-24 | 江苏理工学院 | Method for photocatalytic degradation of waste gas by electrodeless excimer lamp |
| CN106139844A (en) * | 2015-04-10 | 2016-11-23 | 张作保 | A kind of remove high concentration foul gas and the odor removal of VOC waste gas and method |
| CN106955559A (en) * | 2016-01-12 | 2017-07-18 | 上海溪工环境科技有限公司 | Meteorological condition self adaptation deodorizing device |
| CN106178869A (en) * | 2016-09-24 | 2016-12-07 | 山东迪浩环保设备有限公司 | A kind of high-efficient treatment device for industrial organic exhaust gas |
| CN108295640A (en) * | 2018-02-11 | 2018-07-20 | 深圳市力德环保工程有限公司 | A kind of odor treatment method and equipment |
| CN108176210B (en) * | 2018-03-05 | 2020-02-18 | 北京建筑大学 | Treatment method and device for hardly-degradable malodorous gas |
| CN111603929B (en) * | 2020-05-30 | 2021-11-16 | 西安交通大学 | System and method for treating VOCs by excimer light coupling catalysis means |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2175637Y (en) * | 1993-08-26 | 1994-08-31 | 中国人民解放军防化研究院技术开发部一部 | Air purification device for treating organic waste gas |
| WO2004018589A1 (en) * | 2002-08-22 | 2004-03-04 | Philips Intellectual Property & Standards Gmbh | Device for generating radiation |
-
2005
- 2005-09-30 CN CNB2005100302784A patent/CN1319600C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2175637Y (en) * | 1993-08-26 | 1994-08-31 | 中国人民解放军防化研究院技术开发部一部 | Air purification device for treating organic waste gas |
| WO2004018589A1 (en) * | 2002-08-22 | 2004-03-04 | Philips Intellectual Property & Standards Gmbh | Device for generating radiation |
Non-Patent Citations (5)
| Title |
|---|
| 172nm真空紫外辐射降解水相有机染料的机理研究 冯祥芬等，环境科学学报，第25卷第6期 2005 * |
| 172nm真空紫外辐射降解水相有机染料的机理研究 冯祥芬等，环境科学学报，第25卷第6期 2005;蜂窝状活性碳在大风量有机废气治理技术中的应用 尹维东等，环境科学研究，第13卷第5期 2000;国外炭材料在环境保护方面应用的新进展 朱建华，江苏化工 2000;一种新型的紫外光源－准分子紫外灯 徐金洲等，真空科学与技术，第21卷第4期 2001 * |
| 一种新型的紫外光源－准分子紫外灯 徐金洲等，真空科学与技术，第21卷第4期 2001 * |
| 国外炭材料在环境保护方面应用的新进展 朱建华，江苏化工 2000 * |
| 蜂窝状活性碳在大风量有机废气治理技术中的应用 尹维东等，环境科学研究，第13卷第5期 2000 * |
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