CN109865411A - The device and method of VOCs in a kind of purification exhaust gas - Google Patents
The device and method of VOCs in a kind of purification exhaust gas Download PDFInfo
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- CN109865411A CN109865411A CN201711250713.3A CN201711250713A CN109865411A CN 109865411 A CN109865411 A CN 109865411A CN 201711250713 A CN201711250713 A CN 201711250713A CN 109865411 A CN109865411 A CN 109865411A
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- exhaust gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The present invention relates to the device and method of VOCs in purification exhaust gas a kind of.The device includes the catalytic oxidizing equipment and biofiltration device being linked in sequence, the ferrum-based catalyst packed bed and dioxygen water sprinkler system for carrying out catalysis oxidation to exhaust gas are equipped in the catalytic oxidizing equipment, the dioxygen water sprinkler system is located at the top of the ferrum-based catalyst packed bed, is additionally provided with the exhaust gas inlet below ferrum-based catalyst packed bed and the clean gas outlet above dioxygen water sprinkler system on catalytic oxidizing equipment.The device successively carries out catalysis oxidation, biofiltration processing to the VOCs in exhaust gas, and spray has the ferrum-based catalyst surface of hydrogen peroxide solution that can coat H2O2Liquid film, and the OH and atom O with strong oxidizing property are generated, the VOCs in exhaust gas is subjected to oxygenolysis；It is not processed fall VOCs enter in biofiltration device, decomposed by microorganism as the energy and nutriment, finally realize the qualified discharge of high VOCs exhaust gas.
Description
Technical field
A kind of process field of exhaust gas of the present invention, and in particular to device and method for purifying VOCs in exhaust gas.
Background technique
VOCs is the general name of volatile organic matter, which is relatively widely used in petrochemical industry, printing, bakes
The industries such as paint, coating, electronic component are used mainly as solvent, are evaporate into air after use.VOCs not only has people
Stimulation, and most of to internal organ, the toxic effect of nervous system, for example, benzene compounds can Central nervous cause to damage
Evil, into human body after can endanger blood and blood forming organ；Halogen compound can cause the undesirable conditions such as decrease of platelet；Alkene and
Certain arene compounds are evaporate into air, can be chemically reacted with nitrogen oxides under illumination effect, be formed photochemistry
Smog causes secondary pollution.
Currently, the method for processing VOCs mainly has heat damage method, condensing recovery method, absorption method etc., heat damage method is direct
Auxiliary combustion VOCs or add catalyst accelerate reaction, be finally reached reduce pollutant concentration method, this method be suitable for it is low dense
The processing of the VOCs of degree；Condensing recovery method utilizes under different temperatures, and the different feature of the saturation degree of organic matter increases or decreases and is
It unites pressure, condensing recovery is passed through in gaseous pollutant, the disadvantage is that operation difficulty is big, not easy-to-use condensed water at normal temperature
It completes, processing cost is higher；Absorption method is suitable for the organic exhaust gas of low concentration, the method comparative maturity, but equipment is huge
Greatly, process flow is complicated.
In general, the purification process of existing VOCs, the deficiency that there is treatment effeciencies is low, processing cost is high.
Summary of the invention
The purpose of the present invention is to provide the devices of VOCs in purification exhaust gas a kind of, to solve the purification work of existing VOCs
The problem that treatment effeciency existing for skill is low, processing cost is high.
Second object of the present invention is to provide a kind of method for purifying VOCs in exhaust gas.
Technical solution used by the device of VOCs is in purification exhaust gas of the invention:
The device of VOCs, catalytic oxidizing equipment and biofiltration device including sequential connection, institute in a kind of purification exhaust gas
The ferrum-based catalyst packed bed and dioxygen water sprinkler system being equipped in catalytic oxidizing equipment for carrying out catalysis oxidation to exhaust gas are stated,
The dioxygen water sprinkler system is located at the top of the ferrum-based catalyst packed bed, is additionally provided on catalytic oxidizing equipment positioned at iron-based
Exhaust gas inlet below catalyst filling bed and the clean gas outlet above dioxygen water sprinkler system.
The device of VOCs, successively carries out catalysis oxidation, biofiltration to the VOCs in exhaust gas in purification exhaust gas of the invention
Processing, spray have the ferrum-based catalyst surface of hydrogen peroxide solution that can coat H2O2Liquid film, and generate have strong oxidizing property OH and
VOCs in exhaust gas is carried out oxygenolysis by atom O；It is not processed fall VOCs enter in biofiltration device, by microorganism
It is decomposed as the energy and nutriment, finally realizes the qualified discharge of high VOCs exhaust gas.
The device of VOCs further includes the dust-extraction unit positioned at the catalytic oxidizing equipment upstream, dedusting in the purification exhaust gas
The air outlet of device is connected with the exhaust gas inlet of catalytic oxidizing equipment.Preferably, the dust-extraction unit is cyclone dust collectors.Rotation
Wind deduster is different from separation of the existing cyclone dust collectors to dust, main function be to static electrification substance in exhaust gas, colloidal sol,
Macromolecular substances are handled, and by colliding, combining the effects of is converted, and are further passed through settlement action and are separated.To useless
Above-mentioned substance is pre-processed in gas, can be ready for subsequent catalytic oxidation stage, reduces above-mentioned substance to catalysis oxygen
Change the influence of reaction, improves subsequent technique treatment effeciency.
In the catalytic oxidizing equipment, it is equipped between exhaust gas inlet and ferrum-based catalyst packing layer for exhaust gas
The gas humidification system humidified.Humidification process is carried out to exhaust gas, can remove water soluble ingredient and the adsorbable particle of water, humidification
Exhaust gas may be that subsequent catalyst oxidation reaction is got ready, improve the catalysis oxidation efficiency.
The ferrum-based catalyst is the pig iron, ferriferous oxide or molysite.Using the pig iron as catalyst, discarded iron not only may be implemented
Recycling, and can use iron-carbon micro-electrolysis reaction and advanced optimize treatment effect to exhaust gas.
The ferrum-based catalyst is spheric granules or laminated structure.The diameter of spheric granules is 3-5mm.Using the preferred side
The ferrum-based catalyst of case has the characteristics that treatment effeciency is high, air resistance is small, operating cost is low.
The leakage fluid dram for waste liquid to be discharged and the manhole for replacing ferrum-based catalyst are additionally provided on the catalytic reactor.
The main component of waste liquid is nitric acid, sulfuric acid etc., can further add pulverized limestone neutralization, and Lai Shixian waste utilization avoids secondary dirt
Dye.
The present invention purifies technical solution used by the method for VOCs in exhaust gas:
A kind of method of VOCs in purification exhaust gas, comprising the following steps: exhaust gas and spray are had into the iron-based of hydrogen peroxide solution
Catalyst carries out catalytic oxidation, then carries out biofiltration processing.
Before carrying out catalytic oxidation, the exhaust gas is subjected to humidification process.By exhaust gas by humidification pretreatment, can go
Except water soluble ingredient and the adsorbable particle of water, reduces subsequent contamination object load and get ready for subsequent catalyst oxidation reaction, mention
High the catalysis oxidation efficiency.Preferably, before humidification process, exhaust gas is dusted processing.It is further preferred that the dust removal process
To be handled by cyclone dust removal equipment.Exhaust gas after cyclone dust removal equipment is pre-processed, can remove in exhaust gas with quiet
Isoelectric substance, colloidal sol, macromolecular substances improve the treatment effeciency of subsequent processing steps.
The ferrum-based catalyst is the pig iron, ferriferous oxide or molysite.Using the pig iron as catalyst, discarded iron not only may be implemented
Recycling, and can use iron-carbon micro-electrolysis reaction and advanced optimize treatment effect to exhaust gas.
H in the hydrogen peroxide solution2O2Mass concentration be at least 8%.Adjust pH value≤5 of hydrogen peroxide solution.It can pass through
Add the H of high concentration2O2And acid, meet above-mentioned condition to adjust hydrogen peroxide solution.
The method of VOCs in purification exhaust gas of the invention, technique is environmentally protective, operating cost is low, to Paint Factory, spraying factory,
The high VOCs exhaust gas of the enterprises such as printing house, paint spray booth, coating factory, chemical plant, oil plant has good clean-up effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the device of VOCs in purification exhaust gas of the invention；
Fig. 2 is the structural schematic diagram of catalysis oxidizing tower in Fig. 1.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The specific embodiment of the device of VOCs, as shown in Figure 1 to Figure 2, including is linked in sequence in purification exhaust gas of the invention
Cyclone dust collectors 10, catalysis oxidizing tower 20 and biofilter 30.
Cyclone dust collectors include cylinder 101, and air inlet 102 on cylinder is set to the intracorporal air outlet 103 of cylinder and ash
Bucket 104.Cyclone dust collectors can also make static electrification substance in exhaust gas, colloidal sol, big in addition to having the function of separating bulky grain ingredient
The substances such as molecule are converted by the effects of collision, combination, are further passed through settlement action and are separated.Pass through cyclone dust collectors
Processing, it is possible to prevente effectively from exhaust gas the substances such as static electrification substance, colloidal sol, macromolecular to subsequent catalyst oxidation, biofiltration
The adverse effect of device improves the treatment effeciency of catalysis oxidation, biofiltration step.
Ferrum-based catalyst packed bed 3 and hydrogen peroxide for carrying out exhaust gas catalysis oxidation is equipped in catalysis oxidizing tower 20 to spray
Leaching system 5, dioxygen water sprinkler system 5 are located at the top of ferrum-based catalyst packed bed, and catalysis oxidizing tower 20, which has, is located at iron-based urge
Exhaust gas inlet 1 below agent packed bed and the clean gas outlet above dioxygen water sprinkler system 8.Dioxygen water sprinkler system
5 include the spray pipeline 53 for being connected with multiple spray heads 50, and spray pipeline 53 is by being located at the connection outside catalytic oxidizing equipment
Pipeline 51 is connected with dioxygen water storage tank 52, and hydrogen peroxide solution is loaded in dioxygen water storage tank 52, is also connected in connecting pipe 51
There is spray pump.
Ferrum-based catalyst packed bed can be the discarded pig iron, ferriferous oxide or molysite.Ferriferous oxide may be selected iron oxide,
Ferrous sulfate etc. may be selected in ferroso-ferric oxide etc., molysite.Ferrum-based catalyst can be the spheric granules or sheet knot of diameter 3-5mm
Structure etc..Use the pig iron as ferrum-based catalyst, not only realizes the disposition of discarded iron, but also it is anti-to can use iron-carbon micro-electrolysis
It answers, the synergistic effect of the heterogeneous Fenton's reaction of gas liquid solid, improves the catalytic oxidation treatment effect to exhaust gas.
Be additionally provided between exhaust gas inlet 1 and ferrum-based catalyst packed bed 3 in catalysis oxidizing tower 20 for exhaust gas into
The gas humidification system 2 of row humidification.Gas humidification system 2 include with the substrate of communication bores structure uniformly intensively arranged and
Multiple fog-spray nozzles on base lower surface, the substrate are circular slab, the periphery of circular slab and catalytic oxidizing equipment it is interior
Wall surface is fixedly connected.
The leakage fluid dram 7 positioned at exhaust gas inlet lower part is additionally provided in the catalysis oxidizing tower 20, for replacing ferrum-based catalyst
Manhole 4 and peep hole 9.
Biofilter has biologic packing material bed 301；Biologic packing material used in biologic packing material bed includes load filler and attachment
The prior art can be used in microorganism on load filler, load filler, microorganism；Catalysis oxidizing tower and biofilter
Connecting pipe, which has, protrudes into dip section 302 in biofilter, is spaced apart on the dip section along the length direction of dip section
Equipped with multiple gas outlet groups, each gas outlet group includes multiple gas outlets 303 uniformly distributed in a ring；Between the top of biofilter
Every being equipped with multiple offgas outlets 304, each offgas outlet 304 is connected by connecting pipe with exhaust pipe 305.
The present embodiment purification exhaust gas in VOCs device work when, the exhaust gas of high concentration VOCs through cyclone dust collectors at
After reason, static electrification, colloidal sol, macromolecular substances are eliminated, realize the pretreatment to exhaust gas, subsequently into catalysis oxidizing tower, are urged
Change the OH and atom O of the strong oxidizing property that oxidative system generates by VOCs oxygenolysis most in exhaust gas, after oxygenolysis
The gas qualified discharge after biofiltration tower is handled again.Above-mentioned processing step divides the exhaust-gas treatment of high concentration VOCs to three steppings
Row, each step is with strong points, can effectively be ready for subsequent step, so as to improve the treatment effect of high concentration VOCs, mentions
High treatment efficiency.
The embodiment of the method for VOCs in purification exhaust gas of the invention, by taking the exhaust gas that albumen drying class enterprise generates as an example into
Row illustrates that the predominantly ammonia, ketone, aldehydes, alcohols of pollutant are located since the type of contained VOCs is more, concentration is big in exhaust gas
It is larger to manage difficulty, when being handled using the device of VOCs in above-mentioned purification exhaust gas, specifically uses following steps: by exhaust gas through revolving
After the processing of wind deduster, subsequently into catalysis oxidizing tower, first humidified processing, then have with spray the iron-based catalysis of hydrogen peroxide solution
Agent carries out catalytic oxidation, the qualified discharge after biofiltration is handled of the gas after reaction.
It is handled using the exhaust gas that the method for the present embodiment generates albumen drying class enterprise, to the row of biofilter
Gas is detected (exhaust gas flow 8000m out3/ h), VOCs concentration 630.65mg/m before handling3, VOCs concentration after processing
51.36mg/m3, treatment effeciency reaches 91.85%, and treated, and tail gas meets national emission standard.
In above embodiments, ferrum-based catalyst is the spheric granules pig iron, partial size 3-5mm.In other circumstances, sheet knot
The structure pig iron, the molysite such as spheric granules ferrous sulfate, the ferriferous oxides such as iron oxide of spheric granules can also be met the requirements.
It is raw materials used in catalytic oxidation stage in above-mentioned purification exhaust gas in the technique of VOCs, such as ferrum-based catalyst, hydrogen peroxide
Deng, be low cost feedstock, and have nontoxic, environmentally protective advantage；Load filler in biofiltration step and micro-
Commercially available customary commercial can be used in biology, and in general, the operating cost of the technique is lower.In terms of the process operation feature of environmental protection,
VOCs reaches discharge after purification.For the exhaust gas containing nitrogen oxides, oxysulfide, through catalysis oxidation in catalysis oxidizing tower
Producible HNO3、H2SO4Solution, can be further to HNO3、H2SO4It adds pulverized limestone in solution to be neutralized, in N-process
The CaSO of generation4Precipitating is recycled by arranging bed mud mode, the Ca (NO of generation3)2It can be returned by decrease temperature crystalline mode
It receives, and is used for agricultural production as fertilizer.The generation without secondary pollution of entire technical process belongs to a kind of processing efficiently, green
The technique of high concentration VOCs.
Claims (10)
1. the device of VOCs in a kind of purification exhaust gas, which is characterized in that catalytic oxidizing equipment and biological mistake including sequential connection
Device is filtered, ferrum-based catalyst packed bed and hydrogen peroxide for carrying out catalysis oxidation to exhaust gas are equipped in the catalytic oxidizing equipment
Spray system, the dioxygen water sprinkler system are located at the top of the ferrum-based catalyst packed bed, also set on catalytic oxidizing equipment
There are the exhaust gas inlet being located at below ferrum-based catalyst packed bed and the clean gas outlet above dioxygen water sprinkler system.
2. purifying the device of VOCs in exhaust gas as described in claim 1, which is characterized in that the dress of VOCs in the purification exhaust gas
Setting further includes the dust-extraction unit for being located at the catalytic oxidizing equipment upstream, the air outlet of dust-extraction unit and giving up for catalytic oxidizing equipment
Gas import is connected.
3. purifying the device of VOCs in exhaust gas as claimed in claim 2, which is characterized in that the dust-extraction unit is cyclone dust removal
Device.
4. purifying the device of VOCs in exhaust gas as described in claim 1, which is characterized in that in the catalytic oxidizing equipment,
The gas humidification system for being humidified to exhaust gas is equipped between exhaust gas inlet and ferrum-based catalyst packing layer.
5. purifying the device of VOCs in exhaust gas as described in claim 1, which is characterized in that the ferrum-based catalyst is spherical
Grain or laminated structure.
6. a kind of method of VOCs in purification exhaust gas, which comprises the following steps: have dioxygen water-soluble exhaust gas and spray
The ferrum-based catalyst of liquid carries out catalytic oxidation, then carries out biofiltration processing.
7. purifying the method for VOCs in exhaust gas as claimed in claim 6, which is characterized in that before carrying out catalytic oxidation,
The exhaust gas is subjected to humidification process.
8. purifying the method for VOCs in exhaust gas as claimed in claim 7, which is characterized in that before humidification process, exhaust gas is carried out
Cyclone dust removal processing.
9. as claimed in claim 6 purification exhaust gas in VOCs method, which is characterized in that the ferrum-based catalyst be the pig iron,
Ferriferous oxide or molysite.
10. purifying the method for VOCs in exhaust gas as claimed in claim 6, which is characterized in that H in the hydrogen peroxide solution2O2's
Mass concentration is at least 8%.
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Cited By (7)
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| CN110385034A (en) * | 2019-07-25 | 2019-10-29 | 江苏中科睿赛环境工程有限公司 | A kind of the exhaust gas joint processing system and combination treatment method of biology-adsoption catalysis |
| CN110496530A (en) * | 2019-08-22 | 2019-11-26 | 东莞市环境科学研究所 | A kind of method and apparatus of processing low temperature oil expression exhaust gas |
| CN110665364A (en) * | 2019-09-25 | 2020-01-10 | 张兆华 | A environmental protection purification unit for organic waste gas purifies |
| CN110975558A (en) * | 2019-12-26 | 2020-04-10 | 深圳瑞科曼环保科技有限公司 | Malodorous gas purification method and purification device |
| CN111530275A (en) * | 2020-05-13 | 2020-08-14 | 顾晓杰 | Organic waste gas handles with many membrane formula biological washing device |
| CN113648825A (en) * | 2021-08-11 | 2021-11-16 | 河北科技大学 | Technical method for purifying high-humidity chemical medicine VOCs and peculiar smell tail gas |
| CN115463505A (en) * | 2021-06-11 | 2022-12-13 | 江苏宁达环保股份有限公司 | Waste gas treatment system and method in crushing and separating process of waste refrigerator |
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| CN115463505A (en) * | 2021-06-11 | 2022-12-13 | 江苏宁达环保股份有限公司 | Waste gas treatment system and method in crushing and separating process of waste refrigerator |
| CN113648825A (en) * | 2021-08-11 | 2021-11-16 | 河北科技大学 | Technical method for purifying high-humidity chemical medicine VOCs and peculiar smell tail gas |
| CN113648825B (en) * | 2021-08-11 | 2024-03-12 | 河北科技大学 | Technical method for purifying VOCs and peculiar smell tail gas of high-humidity chemical medicine |
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