CN105498495A - Device for treating waste gas by Fenton oxidation - Google Patents
Device for treating waste gas by Fenton oxidation Download PDFInfo
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- CN105498495A CN105498495A CN201511014607.6A CN201511014607A CN105498495A CN 105498495 A CN105498495 A CN 105498495A CN 201511014607 A CN201511014607 A CN 201511014607A CN 105498495 A CN105498495 A CN 105498495A
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- 239000002912 waste gas Substances 0.000 title claims abstract description 25
- 230000003647 oxidation Effects 0.000 title claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 44
- 238000010521 absorption reaction Methods 0.000 claims abstract description 28
- 239000007921 spray Substances 0.000 claims description 50
- 239000003814 drug Substances 0.000 claims description 8
- 229940079593 drug Drugs 0.000 claims description 8
- -1 polypropylene Polymers 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 230000015556 catabolic process Effects 0.000 abstract description 6
- 238000006731 degradation reaction Methods 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
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- 229920006395 saturated elastomer Polymers 0.000 abstract description 4
- 230000002441 reversible effect Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 61
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 26
- 150000003254 radicals Chemical class 0.000 description 7
- 238000005507 spraying Methods 0.000 description 7
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- 238000003756 stirring Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical group S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
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- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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- 150000002148 esters Chemical class 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 208000032839 leukemia Diseases 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a device for treating waste gas by Fenton oxidation. An absorbing tower is communicated with the lower part of a liquid storing tank; the absorbing tower and the upper part of the liquid storing tank are communicated with through a liquid feeding pipeline and a circulating pump; a waste gas inlet device, a filter bulb layer, a solution atomizing device and a gas discharging hole are arranged in the absorbing tower in sequence from bottom to top; an air fine pipeline and a solution fine pipeline are arranged inside the solution atomizing device; the air fine pipeline and the solution fine pipeline are connected with each other through a plurality of air atomizing nozzles; the air fine pipeline is communicated with the external environment through an air pipeline and an air compressor; the solution fine pipeline and the liquid feeding pipeline are communicated with each other; the circulation pump and a dosing pump are in controlled connection with a control panel. According to the device, waste gas is absorbed in a reverse flow form by means of air atomizing, and pollutants can come into full contact with a Fenton solution, so that the problems of high waste gas treatment cost, incomplete degradation, low absorbing capacity, poor effect, difficulty in treating saturated absorption liquid in the prior art are solved.
Description
Technical field
The invention belongs to waste gas and technical field of waste water processing, particularly, disclose the device that a kind of Fenton oxidation administers waste gas.
Background technology
Along with China's industry and economic fast development, volatile organic contaminant (or claiming organic exhaust gas) has become one of principal element of China's urban atmospheric pollution, one of important presoma of key cities of China group and key area air combined pollution, heavy damage atmospheric environment and harm humans health.Organic exhaust gas and atmospheric environment aerosol particle thing (as PM2.5 etc.), haze and photochemical fog etc. are formed closely related.China enters the organic exhaust gas of air every year more than 3,000 ten thousand tons.Live and work, greatly the infringement common people that the haze weather that China's large area breaks out lastingly in recent years has a strong impact on people are healthy, and cause fear and the strong dissatisfaction of society, even cause global extensive concern.VOCs not only derives from numerous industrial processes such as automobile making, packages printing, equipment manufacturing, electronic manufacture, Furniture manufacture and bio-pharmaceuticals in a large number, is also extensively present in indoor human settlement and human activity process.Main organic exhaust gas comprises carbon hydrocarbon compound, benzene and benzene homologues, alcohols, ketone, phenols, aldehydes, ester class.Many VOCs(are as benzene homologues etc.) toxicity is extremely strong, and enter human body by respiratory tract and skin, causing the organs and systems pathologies such as breathing, blood, liver, is the major incentive of many diseases such as leukaemia.In 25 kinds of gases in toxic gas emission inventory (TRI) listed by Environmental Protection Agency, 18 kinds are had to be organic pollution.Therefore, it is concerning national health, social stability and Economic Sustainability sexual development that VOCs administers, and has great importance.
In addition, industrialized propelling in recent years, also causes China's city odor pollution more and more serious.Odor pollution has caused the extensive attention of world community, by one of many countries six large public hazards thinking to be only second to noise.Because the requirement of people to atmosphere quality is more and more higher, but the general threshold value of odorant is lower.Therefore, the control of foul gas is just put on the agenda.
China votes through newly " The Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution " in the 16 meeting of 12 Standing Committee of the National People's Congress, sternly grabs atmosphere quality.All parts of the country also constantly step up to formulate toxic emission industry and provincial standard, and for adapting to stricter energy-conserving and environment-protective requirement, recent year software engineering researchers invent goes out some novel VOCs treatment technology, but still there is many defects.
Chinese invention patent CN202376892U discloses a kind of advanced oxidation washing method and administers organic exhaust gas integration device, and its main composition is condenser, scrubbing tower, oxidation trough, doser, ozone generator.The integrated apparatus of this process organic exhaust gas needs to install ozone generator, and energy consumption is high and there is residual ozone secondary pollution.In addition, cleaning solution exist insoluble organic waste gas difficult to absorb, the easy defect such as saturated.
Chinese invention patent CN203303827U discloses a kind of integrated apparatus for VOCs treatment, comprise absorption tower, liquid reserve tank, dosing pump, waste water reaction pond, but this device can not realize organic exhaust gas absorption and waste water reprocessing in-situ synchronization is carried out, and increases processing cost.And this device adopts simply traditional aqueous solution spray head, there is gas-liquid mass transfer resistance in organic exhaust gas and solution, reduces organic exhaust gas assimilation effect.
Chinese invention new patent CN104707446A discloses a kind of spray abatement equipment of industrial waste gas, comprises spray column, water tank, water pump, liquor charging pipeline and control panel, exist equally absorbing liquid easily saturated and organic wastewater need the defects such as reprocessing.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide the device that a kind of Fenton oxidation administers waste gas.
The present invention is achieved by the following technical programs.
A kind of Fenton oxidation administers the device of waste gas, comprise absorption tower, liquid reserve tank, dosing tank, liquor charging pipeline, drug feeding pipeline, dosing pump and circulating pump, described absorption tower is communicated with the bottom of liquid reserve tank, absorption tower is communicated with circulating pump by described liquor charging pipeline with the top of liquid reserve tank, gas inlet device is provided with successively from bottom to top in described absorption tower, filter bulb layer, solution spray device and gas discharge outlet, described solution spray device inside is provided with air thin pipe and solution thin pipe, connected by several air atomizer spray nozzles between air thin pipe and solution thin pipe, described air thin pipe passes through air duct, air compressor machine and external environment connect, described solution thin pipe and described liquor charging pipeline communication, described dosing tank is communicated with dosing pump by drug feeding pipeline with the top of liquid reserve tank, described circulating pump, dosing pump and control panel control connection.
When device of the present invention uses, with Fenton solution for absorbing liquid, adopt air-atomizing form counter-current absorption by the waste gas of filter bulb layer, and controlling composition, the flow of absorbing liquid by control panel, and the intensity of spraying, atomizing effect is evenly and have certain pressure, can prevent from being purged by air inlet, super-fine atomization particle diameter is less than 20 microns, and pollutant can be made fully to contact with Fenton solution, the strong oxidative free radical energy persistent high efficiency degradation of contaminant of Fenton solution generation simultaneously.Described device solves that conventional exhaust treatment cost is high, assimilation effect is poor, degraded not thoroughly and there is secondary pollution problems, make full use of liquid phase atomization and absorb associating Fenton solution Strong oxdiative degradation capability, persistent high efficiency purifying exhaust air, has the advantages such as structure is simple, non-secondary pollution, processing cost are low.
Preferably, described air atomizer spray nozzle is provided with radial spray pipe, and spraying radially sprays, and is more conducive to fully contact with waste gas.
Preferably, described solution spray device is made up of some groups of air thin pipes and solution thin pipe.Preferably, described solution spray device is made up of 2 ~ 4 groups of air thin pipes and solution thin pipe, often organize air thin pipe and solution thin pipe arranged in parallel, or, often organizing air thin pipe and solution thin pipe be disc distribution setting, make the spraying of solution spray device evenly.
Preferably, described gas inlet device is provided with several outlet passageways, and described outlet passageway is corresponding with the position of described air atomizer spray nozzle.Described outlet passageway is upward just to air atomizer spray nozzle, or consistent with the direction of air atomizer spray nozzle down.As a kind of embodiment, described outlet passageway is venthole, and described venthole is equal with the quantity of described air atomizer spray nozzle, and position is corresponding.As another kind of embodiment, described gas inlet device is provided with flaring air-guide disk, and described air-guide disk is opening down and inside arranges some layers of outlet passageway.
Preferably, described filter bulb layer for filler, is highly 10cm-30cm with polypropylene filter bulb.According to the Height Adjustment on absorption tower.Described filter bulb layer for filler, can retain the coarse impurities in waste gas with polypropylene filter bulb on the one hand, and dispersibling gas plays even gas distribution effect on the other hand.
Preferably, the top of described solution spray device is provided with demister, and described demister adopts spiral-flow plate-type demister or Flat defroster.
Preferably, in described liquid reserve tank, be provided with agitator, described agitator and control panel control connection.Preferably, described agitator control connection Multi-stage stirring oar, regulation and control Multi-stage stirring speed.
Preferably, multistage described solution spray device is provided with in described absorption tower.Solution spray device progression is is suitably increased and decreased according to the concentration of waste gas and uninterrupted.
Preferably, described liquor charging pipeline is provided with liquid control valve, for regulating the fluid flow size of described solution spray device; Described air duct is provided with pressure-control valve, for regulating the air pressure size of described solution spray device; Described liquid control valve and pressure-control valve respectively with described control panel control connection.
Preferably, described absorption tower is provided with access panel.
Preferably, the top of described liquid reserve tank is provided with access panel, and the sidewall of described liquid reserve tank is provided with exhaust-valve.
Preferably, described waste gas is that organic exhaust gas is or/and foul gas.
Compared with prior art, beneficial effect of the present invention is:
(1) apparatus of the present invention adopt air-atomizing form to absorb waste gas with reverse Process flow, atomizing effect evenly and have certain pressure, can prevent from being purged by air inlet, super-fine atomization particle diameter is less than 20 microns, pollutant can be made fully to contact with Fenton solution, the simultaneously strong oxidative free radical energy persistent high efficiency degradation of contaminant that produces of Fenton solution, solve that existing waste gas pollution control and treatment cost is high, degraded not thoroughly, low, the weak effect of absorptive capacity and the saturated rear problem such as difficult of absorbing liquid.
(2) advantages such as apparatus of the present invention structure is simple, efficient stable detergent power, absorbent solution in-situ regeneration, non-secondary pollution, processing cost are low, and service ability can be regulated according to the kind of organic pollution, character, concentration level, industrial organic exhaust gas and foul gas purification treatment field of purification can be widely used in.
Accompanying drawing explanation
Fig. 1 is the reaction principle schematic diagram of apparatus of the present invention.
Fig. 2 is the overall structure schematic diagram of embodiment 1 device.
Fig. 3 is the partial enlarged drawing of solution spray device described in embodiment 1 device.
Fig. 4 is the air-guide disk of gas inlet device described in embodiment 1 device.
Fig. 5 is air-guide disk outlet upward view described in embodiment 1 device.
Fig. 6 is the overall structure schematic diagram of embodiment 2 device.
Caption: 1-absorption tower; 2-liquid reserve tank; 3-dosing tank; 4-circulating pump; 5-liquor charging pipeline; 6-air duct; 7-agitator; 8-dosing pump; 9-drug feeding pipeline; 10-liquid control valve; 11-solution spray device; 12-air atomizer spray nozzle; 13-filter bulb layer; 14-access panel; 15-demister; 16-gas inlet device; 17-gas discharge outlet; 18-solution thin pipe; 19-air thin pipe; 20-air-guide disk.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.Wherein, accompanying drawing only for exemplary illustration, expression be only schematic diagram, but not pictorial diagram, can not be interpreted as the restriction to this patent; In order to better embodiments of the invention are described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; For a person skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Embodiment 1
The present embodiment provides a kind of Fenton oxidation to administer the device of waste gas, as shown in Figure 1 and 2, comprises absorption tower 1, liquid reserve tank 2, dosing tank 3, liquor charging pipeline 5, drug feeding pipeline 9, dosing pump 8 and circulating pump 4.Described absorption tower 1 is communicated with the bottom of liquid reserve tank 2, their top is communicated with circulating pump 4 by described liquor charging pipeline 5, described dosing tank 3 is communicated with dosing pump 8 by drug feeding pipeline 9 with the top of liquid reserve tank 2, agitator 7 is provided with in liquid reserve tank 2, be provided with access panel above liquid reserve tank 2, its sidewall is provided with exhaust-valve.Described agitator 7, circulating pump 4, dosing pump 8 respectively with control panel control connection.Gas inlet device 16, filter bulb layer 13, solution spray device 11, demister 15 and gas discharge outlet 17 is provided with from bottom to top successively in described absorption tower 1.Described filter bulb layer 13 for filler, is highly 10cm-30cm with polypropylene filter bulb.Described demister 15 adopts spiral-flow plate-type demister.Described absorption tower 1 is also provided with access panel 14.
Particularly, as shown in Figure 3, described solution spray device 11 inside is provided with air thin pipe 19 and solution thin pipe 18, connected by 4 equally distributed air atomizer spray nozzles 12 between air thin pipe 19 and solution thin pipe 18, described air thin pipe 19 is by air duct 6, air compressor machine and external environment connect, and described solution thin pipe 18 is communicated with described liquor charging pipeline 5.Described liquor charging pipeline 5 is provided with liquid control valve 10, for regulating the fluid flow size of described solution spray device; Described air duct 6 is provided with pressure-control valve, for regulating the air pressure size of described solution spray device; Described liquid control valve 10 and pressure-control valve respectively with described control panel control connection.
Solution spray device 11 in described absorption tower 1 is provided with one-level, and it is made up of one group of air thin pipe 19 and solution thin pipe 18.Described gas inlet device 16 is provided with flaring air-guide disk 20, and described air-guide disk 20 is opening down consistent with the direction of air atomizer spray nozzle, and inside arranges some layers of outlet passageway, as shown in Fig. 4 ~ 5.
When device of the present invention uses, the solution in described dosing tank 3 is hydrogen peroxide solution, enters liquid reserve tank 2 by drug feeding pipeline 9, and Fenton solution is wherein regulated pH to 2 ~ 4, and described Fenton solution take ferrous sulfate as catalyst; Dosing flow can adjust according to organic exhaust gas kind, concentration level and uninterrupted.Dosing pump 8 output end is placed near circulating pump 4 input, and the free radical be beneficial to Fenton solution generates is transported to solution spray device 11 by described liquor charging pipeline 5 rapidly.The present embodiment device is utilized to make Fenton solution absorbing liquid at absorption tower 1 and liquid reserve tank 2 Inner eycle, adopt air-atomizing form counter-current absorption by the waste gas of filter bulb layer, pollutant in the strong oxidizing property free radical one side direct oxidation gas phase that Fenton solution produces, in absorbing liquid, purify amounts of residual contamination further on the other hand, purified gas directly discharges; In liquid reserve tank 2 Fenton solution, input hydrogen peroxide solution continuously by dosing pump 8, make ferric ion be converted into ferrous ion, the efficient Strong oxdiative ability of recovery system and realize absorbing liquid and recycle.Therefore this device produces secondary wastewater hardly, can reduce device processing cost.
In described device, the setting of solution spray device 11 and gas inlet device 16 increases the contact area of waste gas and absorbing liquid, and composition, the flow of absorbing liquid is controlled by control panel, and the intensity of spraying, atomizing effect evenly and have certain pressure, can prevent Fenton mist from being purged by air inlet, super-fine atomization particle diameter is less than 20 microns, and exhaust emission can be made fully to contact with Fenton solution, persistent high efficiency ground degradation of contaminant.Described device solves that conventional exhaust treatment cost is high, assimilation effect is poor, degraded not thoroughly and there is secondary pollution problems, make full use of liquid phase atomization and absorb associating Fenton solution Strong oxdiative degradation capability, persistent high efficiency purifying exhaust air, has the advantages such as structure is simple, non-secondary pollution, processing cost are low.
Pass through the present embodiment, at flow 1-1.5L/min, temperature is under 25-30 DEG C of condition, and polluter component is that the benzene of concentration 25-30ppm enters reactor, with spraying adverse current and under Fenton solution contact, absorb and react, the further oxidized free radical cracking of amounts of residual contamination in the solution in addition; In reactor, add hydrogen peroxide solution continuously, in whole course of reaction, benzene clearance can reach more than 90%.
By the present embodiment, exhaust gas flow 1000-1200m
3/ h, polluter component is benzene and benzene homologues, and concentration is 20-30ppm, temperature 20-30 DEG C.Waste gas removes coarse impurities through filter bulb layer, and with spraying and lower Fenton solution counter current contacting, through the absorption of Fenton solution and strong oxidative free radical oxidation, benzene and benzene homologues are degraded to CO
2and water, purified gas removes qualified discharge after moisture through high efficiency demister.In running, clean-up effect is stable, purification efficiency can reach 85%.
Embodiment 2
The structure that the Fenton oxidation that the present embodiment provides administers the device of waste gas is substantially identical with embodiment 1, difference is, as shown in Figure 6, be provided with the solution spray device 11 that two-stage is identical in described absorption tower 1, described liquid control valve 10 controls the fluid flow size in two-stage solution spray device 11 simultaneously; Further, every grade of solution spray device 11 is made up of discoid air thin pipe 19 and solution thin pipe 18, is provided with 4 ~ 6 air atomizer spray nozzles 12, and the material of air atomizer spray nozzle 12 is 316 stainless steels, and nozzle can be prevented to be corroded.Described gas inlet device 16 is provided with several just to the venthole of air atomizer spray nozzle 12, and described venthole is equal with the quantity of air atomizer spray nozzle 12 on described solution spray device 11, and position is corresponding.
By the present embodiment, exhaust gas flow 1000-1200m
3/ h, polluter component is hydrogen sulfide, and concentration is 30-50ppm, temperature 20-30 DEG C.Waste gas through filter bulb layer remove coarse impurities, with spraying and under Fenton solution counter current contacting, spray with one-level and under Fenton solution counter current contacting, absorption, afterwards further with secondary spray reaction.The strong oxidizing property free radical that Fenton solution produces directly by the cracking of odor pollution material, be oxidized to low molecule innocuous substance, purified gas removes qualified discharge after moisture through demister.In running, deodorization efficiency can reach 87%.
Obviously, the above embodiment of the present invention is only used to example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description, exhaustive without the need to also giving all embodiments here.All do within the spirit and principles in the present invention scope any amendment, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (10)
1. the device of a Fenton oxidation improvement waste gas, comprise absorption tower, liquid reserve tank, dosing tank, liquor charging pipeline, drug feeding pipeline, dosing pump and circulating pump, it is characterized in that, described absorption tower is communicated with the bottom of liquid reserve tank, absorption tower is communicated with circulating pump by described liquor charging pipeline with the top of liquid reserve tank, gas inlet device is provided with successively from bottom to top in described absorption tower, filter bulb layer, solution spray device and gas discharge outlet, described solution spray device inside is provided with air thin pipe and solution thin pipe, connected by several air atomizer spray nozzles between air thin pipe and solution thin pipe, described air thin pipe passes through air duct, air compressor machine and external environment connect, described solution thin pipe and described liquor charging pipeline communication, described dosing tank is communicated with dosing pump by drug feeding pipeline with the top of liquid reserve tank, described circulating pump, dosing pump and control panel control connection.
2. device according to claim 1, is characterized in that, described solution spray device is made up of some groups of air thin pipes and solution thin pipe.
3. device according to claim 1, is characterized in that, described gas inlet device is provided with several outlet passageways, and described outlet passageway is corresponding with the position of described air atomizer spray nozzle.
4. device according to claim 1, is characterized in that, described filter bulb layer for filler, is highly 10cm-30cm with polypropylene filter bulb.
5. device according to claim 1, is characterized in that, the top of described solution spray device is provided with demister, and described demister adopts spiral-flow plate-type demister or Flat defroster.
6. device according to claim 1, is characterized in that, is provided with agitator in described liquid reserve tank, described agitator and control panel control connection.
7. device according to claim 1, is characterized in that, is provided with multistage described solution spray device in described absorption tower.
8. device according to claim 1, is characterized in that, described liquor charging pipeline is provided with liquid control valve, and described air duct is provided with pressure-control valve, liquid control valve and pressure-control valve respectively with described control panel control connection.
9. device according to claim 1, is characterized in that, described absorption tower is provided with access panel.
10. device according to claim 1, is characterized in that, described waste gas is that organic exhaust gas is or/and foul gas.
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| CN201511014607.6A CN105498495A (en) | 2015-12-31 | 2015-12-31 | Device for treating waste gas by Fenton oxidation |
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Application publication date: 20160420 |