CN209188472U - Multistage composite exhaust treatment system - Google Patents

Multistage composite exhaust treatment system Download PDF

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CN209188472U
CN209188472U CN201821917746.9U CN201821917746U CN209188472U CN 209188472 U CN209188472 U CN 209188472U CN 201821917746 U CN201821917746 U CN 201821917746U CN 209188472 U CN209188472 U CN 209188472U
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microwave
unit
gas
treatment system
exhaust
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代秀琼
张雷
代雷霆
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Chengdu Mermaid Environmental Protection Engineering Co Ltd
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Chengdu Mermaid Environmental Protection Engineering Co Ltd
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Abstract

The utility model relates to gas pollutant processing techniques.The utility model discloses a kind of multistage composite exhaust treatment system, including gas-filtering device, microwave photocatalytic device, gaseous oxidation device and synchronous adsorbent equipment;The microwave photocatalytic device, including reaction cavity, control unit, microwave generating unit, ozone monitoring unit, VOC monitoring unit and ultraviolet spectra monitoring unit;It is equipped with electrodeless lamp tube in the reaction cavity, is connect by pipeline with wastewater collection exhaust unit;The ozone monitoring unit, VOC monitoring unit and ultraviolet spectra monitoring unit are connect with control unit;The microwave generating unit has at least two microwave generator, and for generating strong electromagnetic wave, excitation electrodeless lamp tube generates short wave ultraviolet light;The microwave generator is connect with control unit.The utility model exhaust treatment efficiency is high, does not generate secondary pollution in treatment process, and there is no the security risks such as high temperature, explosion, is very suitable to the processing of vehicle repairing factory combined padding and drying system exhaust gas.

Description

Multistage composite exhaust treatment system
Technical field
The utility model relates to field of environment engineering technology, in particular to gas pollutant processing technique, specifically, relating to And a kind of multistage composite exhaust treatment system.
Background technique
In current environment-friendly engineering, be related to the technology of industrial waste gas processing mainly include the following types:
RTO (Regenerative Thermal Oxidizer, abbreviation RTO), heat accumulating type oxidation furnace.It is that one kind efficiently has Machine waste gas pollution control and treatment equipment.Its principle is that combustible exhaust gas is oxidized to corresponding oxide and water at high temperature, to purify exhaust gas, And the heat released when exhaust gas decomposes is recycled, heat recovery efficiency can achieve 95% or more.RTO main structure is by burning The composition such as room, ceramic packing bed and switching valve.According to client's actual demand, different thermal energy way of recycling and switching valve side are selected Formula.
Thermal accumulating incinerator is recycled using the organic exhaust gas of low concentration in thermal oxidation method processing with ceramic heat-storing bed heat exchanger Heat.It is made of ceramic heat-storing bed, autocontrol valve, combustion chamber and control system etc..
It is mainly characterized by comprising: that the autocontrol valve of energy storage bed bottom is connected with inlet manifold and exhaust main respectively, accumulation of heat Bed is alternately commutated by reversal valve, the high-temperature gas heat accumulation that will be come out by combustion chamber, and is preheated into the organic of energy storage bed Exhaust gas;It is absorbed using ceramic heat-storing material, release heat;The organic exhaust gas of certain temperature (>=760 DEG C) is preheating in combustion chamber Oxidation reaction occurs, generates carbon dioxide and water, is purified.
It is applicable in organic exhaust gas type: the hydrocarbons such as alkane, alkene, alcohols, ketone, ethers, esters, aromatic hydrocarbons, benzene class Organic exhaust gas;
Organic matter low concentration (while meeting and being lower than 25%LFL), Wind Volume;
Containing there are many organic principles or organic principle to change frequent occurrence in exhaust gas;
Containing being easy to make the exhaust gas of catalyst poisoning or activity decay ingredient.
RCO (Regenerative Catalytic Oxidation), heat accumulating type catalytic combustion method.The method and RTO principle The new technology to grow up in identical and nearly more than 10 year, purifying rate is high, adaptable, without secondary pollution, and it is dense to be applied to exhaust gas It is relatively more to spend high occasion.
RCO VOCs treatment is a kind of new catalytic oxidation technologies, it has the characteristics that RTO high efficiente callback energy and urges Catalyst is placed in the top of heat-storing material by the low-temperature working advantage for changing reaction, improves off-gas oxidizing efficiency, and heat recovery rate is high Up to 95%.
RCO system performance is excellent to be critical that with noble metal that is dedicated, being immersed on saddle or ceramic honeycomb Or transition-metal catalyst, oxidation occur not only to reduce fuel consumption, but also reduce equipment manufacturing cost in 250-500 DEG C of low temperature.
Now with country have begun using RCO technology replace RTO carry out organic exhaust gas purified treatment, many RTO Equipment, which also has begun, is transformed into RCO.
Above-mentioned waste gas processing method belongs to high-temp combustion oxidizing process.Its waste gas treatment equipment is expensive, up to a hundred easily Ten thousand initial stages investment, operation energy consumption is high, and technique controlling difficulty is big, there is certain security risk, is more suitable for the VOC of middle and high concentration (volatile organic compounds) handles (VOC >=10000mg/m3)。
In recent years also there is the technology that some comparisons are suitble to small-scale low concentration gas processing application, UV (ultraviolet light) light Solution, gaseous oxidation, activated carbon adsorption etc..It is UV photodissociation exhaust gas treatment technology that wherein application is more
The characteristics of UV photodissociation: it is suitble to the VOC of low concentration to handle scene (VOC≤1000mg/m3), in adequately reaction enough Under the conditions of, it can be achieved that more satisfactory treatment effect.
UV photodissociation basic principle is with ultraviolet light photocatalyst catalytic bed, and titanium dioxide therein etc. is catalyzed shape in base At electron hole, the electronics of oxygen molecule and hydrone is captured, generates strong oxidizing property group, negative oxygen ion and ozone, using strong Organic pollutant oxygenolysis is water, carbon dioxide etc. by oxidisability.
Substantially all there are following several defects in existing UV photodissociation processing equipment:
Equipment work is low to waste gas humidity tolerance level, and relative humidity is generally required less than 60%;
Equipment is low to exhaust gas temperature tolerance level to be clean, and usually less than 50 DEG C;
Equipment is low to exhaust gas and dust concentration tolerance level to be processed, cannot directly wash with water, and clean-up effect is of short duration, later period dimension It protects at high cost;
Fluorescent tube light decay speed is easy to aging fastly, and fluorescent tube wiring contact and conducting wire are oxidized easily corrosion, leads to service life only Have 500-3000 hours, clean-up effect is not continual and steady enough;
The replacement of the auxiliaries such as fluorescent tube is cumbersome, and maintenance cost is high.
The existing UV photodissociation equipment using electrodeless lamp tube and microwave technology, low, oxygenolysis that there is also photocatalysis efficiencies is not Abundant problem.
In short, the method or the processing of unsuitable medium-sized and small enterprises and middle low concentration gas or exhaust treatment efficiency are low, Cost of equipment maintenance is high.
Utility model content
The main purpose of the utility model is to provide a kind of multistage composite exhaust treatment systems, useless with low concentration in solution Gas disposal problem improves exhaust treatment efficiency, reduces equipment use cost and maintenance cost.
To achieve the goals above, according to the one aspect of specific embodiment of the present invention, a kind of multistage is provided Composite exhaust gas processing system, including gas-filtering device, microwave photocatalytic device, gaseous oxidation device and synchronous adsorbent equipment; The gas-filtering device is connect with microwave photocatalytic device, for filtering the solid particle in exhaust gas;The microwave and photo catalysis Device is connect with gaseous oxidation device, using microwave energy generate UV light combined photocatalyst to the harmful substance in exhaust gas at Reason;The gaseous oxidation device is connected with synchronous adsorbent equipment, is carried out under gas phase condition to harmful substance remaining in exhaust gas Oxidation processes;The synchronous adsorbent equipment is using active material absorption harmful substance and combines microwave energy decomposing harmful substances;
It is characterized by:
The microwave photocatalytic device, including reaction cavity, control unit, microwave generating unit, ozone monitoring unit, VOC monitoring unit and ultraviolet spectra monitoring unit;The reaction cavity is connect by air inlet with gas-filtering device, is reacted Cavity exhaust outlet is connect with gaseous oxidation device;It is equipped with electrodeless lamp tube in the reaction cavity, is arranged by pipeline and wastewater collection Put unit connection;The ozone monitoring unit, VOC monitoring unit and ultraviolet spectra monitoring unit are connect with control unit;It is described Microwave generating unit has at least two microwave generator, and for generating strong electromagnetic wave, excitation electrodeless lamp tube generates short wavelength UV Light;The microwave generator is connect with control unit.
Further, the short wavelength UV optical wavelength≤250nm.
Further, the short wavelength UV optical wavelength range is 210~170nm.
Further, the short wavelength UV optical wavelength is 185nm.
Further, the microwave generator is magnetron.
Further, the cavity is erect-type cavity, and top is provided with spray equipment, and lower part is provided with wastewater collection row Unit is put, the erect-type cavity lower part is connect by pipeline with wastewater collection exhaust unit.
Further, in erect-type cavity lower part, exhaust outlet is arranged on erect-type cavity top for the air inlet setting.
Further, the gas-filtering device is using the solid particle in filter cotton filtering exhaust gas.
Further, the gaseous oxidation device uses ceramic base catalytic bed, to remaining in exhaust gas under gas phase condition Harmful substance carries out oxidation processes.
Further, described control unit is constituted using programmable logic circuit.
The utility model has the beneficial effects that exhaust treatment efficiency is high, secondary pollution is not generated in treatment process, is not present The security risks such as high temperature, explosion.The device structure degree of modularity is high, and maintenance cost is low, is very suitable to vehicle repairing factory combined padding and drying system exhaust gas Processing.
The utility model is described further with reference to the accompanying drawings and detailed description.The utility model is additional Aspect and advantage will be set forth in part in the description, and partially will become apparent from the description below, or practical by this Novel practice is recognized.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide a further understanding of the present invention, the utility model Specific embodiment, illustrative embodiments and their description are not constituted to the utility model not for explaining the utility model Work as restriction.In the accompanying drawings:
Fig. 1 is the multistage composite exhaust treatment system structural schematic diagram according to specific embodiment of the present invention;
Fig. 2 is the microwave photocatalytic device structural schematic diagram according to specific embodiment of the present invention;
Fig. 3 is the gas-filtering device structural schematic diagram according to specific embodiment of the present invention;
Fig. 4 is the gaseous oxidation apparatus structure schematic diagram according to specific embodiment of the present invention;
Fig. 5 is the synchronization adsorbent equipment structural schematic diagram according to specific embodiment of the present invention.
Specific embodiment
It should be noted that in the absence of conflict, specific embodiment, embodiment in the application and therein Feature can be combined with each other.It lets us now refer to the figures and combines the following contents that the utility model is described in detail.
It is specific below in conjunction with the utility model in order to make those skilled in the art better understand the utility model Attached drawing in embodiment, embodiment, to the technical solution in specific embodiment of the present invention, embodiment carry out it is clear, Complete description, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole implementation Example.Based on specific embodiment, the embodiment in the utility model, those of ordinary skill in the art are not making creative labor Every other embodiment obtained, embodiment, all should belong to the range of the utility model protection under the premise of dynamic.
Below by taking vehicle repairing factory combined padding and drying system exhaust-gas treatment as an example, the multistage composite exhaust treatment system of the utility model is carried out Description.
Vehicle repairing factory combined padding and drying system exhaust gas feature: VOC concentration is generally lower than 500mg/m3, calorific value is extremely low.For These characteristics, show So it is not suitable for using RTO, RCO processing technique, the following examples are practical new to this by taking vehicle repairing factory combined padding and drying system exhaust-gas treatment as an example The technical solution of type is described.
Embodiment
This example multistage composite exhaust treatment system structure is as shown in Figure 1, include gas-filtering device 100, microwave and photo catalysis Device 200, gaseous oxidation device 300 and synchronous adsorbent equipment 400.
Exhaust gas enters gas-filtering device 100, behind 3 and filtering, can remove 70% solid particle and 98% Coating cloud.
Exhaust gas by filtering enters microwave photocatalytic device 200 by the pipeline connected, is generated using microwave energy ultraviolet Light combination photocatalyst handles the harmful substance in exhaust gas, wherein most harmful substance is removed, such as benzene, toluene and VOC Deng.
The exhaust gas come out from microwave photocatalytic device 200, is transported in gaseous oxidation device 300 and is further processed, Further oxidation processes are carried out to harmful substance remaining in exhaust gas under gas phase condition.
Gaseous oxidation device 300 is connected with synchronous adsorbent equipment 400, and synchronous adsorbent equipment 400 is adsorbed using active material Remaining harmful substance simultaneously combine the further decomposing harmful substances of microwave energy, to gaseous oxidation device 300 export gas into The processing of last procedure of row.
The multistage composite exhaust treatment system of the utility model, the main function to exhaust-gas treatment are filled in microwave and photo catalysis It sets and completes in 200.
200 structure of this example microwave photocatalytic device is as shown in Fig. 2, include reaction cavity 102, control unit 2, microwave generation Unit 203, ozone monitoring unit 205, VOC monitoring unit 206 and ultraviolet spectra monitoring unit 207.
Reaction cavity 102 is connect by air inlet with gas-filtering device 100,102 exhaust outlet of reaction cavity and gas phase oxygen 300 connections are set in makeup.
This example reaction cavity 102 is erect-type cavity, is below air inlet, and top is exhaust outlet, and air inlet and row Port and reaction cavity are on same central axes.Reaction cavity 102 (is not shown by pipeline with wastewater collection exhaust unit in Fig. 2 It connects out).
It is equipped with electrodeless lamp tube (being not shown in Fig. 2) in reaction cavity 102 and is connect with microwave generating unit 203, receives micro- The microwave signal that wave generating unit 203 exports.Ozone monitoring unit 205, VOC monitoring unit are additionally provided in reaction cavity 102 206 and ultraviolet spectra monitoring unit 207, as shown in Figure 2.
This example microwave generating unit 203 has at least two microwave generator, for generating strong electromagnetic wave, excites Non-polarized lamp Pipe generation wavelength≤250nm short wave ultraviolet light.Microwave generator is connect with control unit 2, the output power of microwave generator By the control of control unit.
Ozone monitoring unit 205, VOC monitoring unit 206 and ultraviolet spectra monitoring unit 207 are connect with control unit 2, ginseng See Fig. 2.
The microwave photocatalytic device 200 of the utility model, reaction cavity 102 are erect-type cavity, are below air inlet, Top is exhaust outlet, and air inlet and exhaust outlet are located on the central axes of reaction cavity 102.Ozone monitoring unit 205, VOC prison The probe and ultraviolet spectra detection unit 207 for surveying unit 206 are arranged in reaction cavity and are connected with control unit.
Erect-type reaction cavity 102 makes air inlet and exhaust outlet and reaction cavity 102 in same vertical direction, Make not deflect on the circulating direction of gas, circulate more smooth.
Erect-type 102 top of reaction cavity is provided with spray equipment, and lower part is provided with wastewater collection exhaust unit, erects Formula cavity lower part is connect by pipeline with wastewater collection exhaust unit, can from top to bottom be rinsed, and water is saved, and flush efficiency is high, Also facilitate waste water to be discharged, guarantee not ponding, reduce the humidity in reaction cavity 102.
The microwave photocatalytic device 200 of the utility model, microwave generating unit 203 can be according to specific reaction cavities 102 Size and exhaust gas flow size, the microwave generator of different number is set, is uniformly controlled by control unit.
Control unit is constituted using programmable logic circuit, that is including ozone concentration, ultraviolet according to the data that monitor Spectroscopic data and VOC content, adjust automatically microwave output power size reach and improve exhaust treatment efficiency and energy saving Purpose.
In microwave photocatalytic device 200, microwave gives the energy to fluorescent tube as a kind of driving source, and excitation fluorescent tube generates The higher electromagnetic wave of frequency (ultraviolet light).The effect of fluorescent tube is exactly that microwave is converted into ultraviolet light light wave, usual fluorescent tube transmitting Ultraviolet wavelength is greater than 250nm, and emission spectrum concentrates on 254-280nm, at this moment relatively low to the requirement of microwave energy, usually The Microwave emission power of 500W can.
By consulting related data discovery, the shorter ultraviolet light of wavelength is easier by pernicious gas molecule absorption, more favorably It is reacted in the catalysis of pernicious gas.In test of many times, it has been found that increasing considerably with microwave energy, can swash Send out the shorter ultraviolet light of fluorescent tube launch wavelength, i.e. short wave ultraviolet light (wave-length coverage is usual are as follows: 100~280nm).
Wavelength concentrates on the short wave ultraviolet light near 185nm, such as the ultraviolet light that wave-length coverage is 210~170nm, it is easier to By pernicious gas molecule absorption, destroy the strand of pernicious gas.The utility model uses multiple microwave generators, can To improve microwave energy output, more short UV lights are generated, in conjunction with photocatalyst catalyst (usually TiO2) synergistic effect, Catalytic efficiency is greatly improved, is handled more thorough.
This example control unit accurately controls the unlatching quantity of microwave generator according to the ultraviolet spectrum data monitored, thus The control for realizing microwave output power, can either improve catalytic efficiency, and not will cause energy waste.
The utility model is with microwave transfer energy and selects Non-polarized lamp, and it is low to waste gas humidity tolerance level to solve equipment Defect, moisture resistance are promoted to 90%;Using automatic cleaning technology, it is low to exhaust gas and dust concentration tolerance level to be processed to solve equipment Defect, equipment can clean automatically, and clean-up effect is continually and steadily efficient, and later maintenance cost is low, and management is simple;Selection is not necessarily to Conducting wire transmits the electrodeless lamp tube of energy, thoroughly solves traditional UV lamps because of conducting wire and contact is easy to oxidize and fluorescent tube light decay speed Fast defect easy to aging, makes lamp tube service life extend to 50000 hours or so, clean-up effect is continual and steady for a long time.
This example microwave generator is constituted using high power magnetron, has technology maturation, and microwave high conversion efficiency works the longevity Order long feature.And the power supply of each magnetron is controlled by control unit, it can very easily adjust microwave and list occurs The output power of member solves the problems, such as that microwave power control is complicated.
100 structure of this example gas-filtering device can filter out as shown in figure 3, using filter cotton 3 grades of filtration systems of composition Most solid particles and coating cloud in exhaust gas.
300 structure of this example gaseous oxidation device referring to fig. 4, using ceramic base catalytic bed gaseous oxidation device in, if Microwave generator has been set, microwave energy input has been increased, harmful substance remaining in exhaust gas is aoxidized under gas phase condition Processing further increases oxidation efficiency, reduces pernicious gas content.
The nano micropore structure of ceramic catalytic bed has certain absorption interception function to VOC.When VOC organic matter is with gas VOC is adsorbed when stream passes through catalytic bed, is further deepened oxidation reaction penetrating degree under the action of photochemical catalyst and microwave, is made whole A gas phase oxidation is more sufficiently thoroughly.
This example synchronizes 400 structure of adsorbent equipment as shown in figure 5, increasing microwave generator in device, is inhaled using active carbon Attached dose, the pernicious gas of remaining is further processed in cooperation microwave energy irradiation.
The utility model configures synchronous adsorbent equipment in exhaust treatment system end, when organic concentration is low, adsorbs residual Remaining ozone;Remaining organic matter is adsorbed when organic concentration is high.Cooperate the effect of high intensity microwave, further deepens residual ozone pair Remaining oxidation operation discomposing effect.Not only ozone remnants had been solved, but also have made organic matter decomposition more thorough.
This example multistage composite exhaust treatment system, VOC removal efficiency is high, and VOC treatment effect is continual and steady;Without combustion explosion Etc. security risks: electromagnetic wave driving, without any power lead in reaction cavity, and cavity inner temperature maintains 80 DEG C or so;Fortune Row expense is low: processing 10000m3/ h exhaust gas, power consumption about 5KW;Using modularized design, increase processing module can according to need, Up-front investment is not wasted, table 1 gives specific processing index.
Table 1
Project (mg/m before processing3) (mg/m after processing3) Removal rate Discharge standard (mg/m3)
voc 473 21 95.6% 60
Benzene 13.4 0.085 99.5% 1
Toluene 0.040 0.017 57.5% 5
Dimethylbenzene 2.88 < 0.5 ≤ 83% 15

Claims (10)

1. multistage composite exhaust treatment system, including gas-filtering device, microwave photocatalytic device, gaseous oxidation device with it is synchronous Adsorbent equipment;The gas-filtering device is connect with microwave photocatalytic device, for filtering the solid particle in exhaust gas;It is described micro- Glistening light of waves catalytic unit is connect with gaseous oxidation device, generates UV light combined photocatalyst to the nuisance in exhaust gas using microwave energy Matter is handled;The gaseous oxidation device is connected with synchronous adsorbent equipment, to nocuousness remaining in exhaust gas under gas phase condition Substance carries out oxidation processes;The synchronous adsorbent equipment is using active material absorption harmful substance and microwave energy decomposition is combined to have Evil substance;
It is characterized by:
The microwave photocatalytic device, including reaction cavity, control unit, microwave generating unit, ozone monitoring unit, VOC prison Survey unit and ultraviolet spectra monitoring unit;The reaction cavity is connect by air inlet with gas-filtering device, reaction cavity Exhaust outlet is connect with gaseous oxidation device;It is equipped with electrodeless lamp tube in the reaction cavity, is discharged by pipeline and wastewater collection single Member connection;The ozone monitoring unit, VOC monitoring unit and ultraviolet spectra monitoring unit are connect with control unit;The microwave Generating unit has at least two microwave generator, and for generating strong electromagnetic wave, excitation electrodeless lamp tube generates short wave ultraviolet light;Institute Microwave generator is stated to connect with control unit.
2. multistage composite exhaust treatment system according to claim 1, which is characterized in that the short wavelength UV optical wavelength≤ 250nm。
3. multistage composite exhaust treatment system according to claim 2, which is characterized in that the short wavelength UV optical wavelength model It encloses for 210~170nm.
4. multistage composite exhaust treatment system according to claim 3, which is characterized in that the short wavelength UV optical wavelength is 185nm。
5. multistage composite exhaust treatment system according to claim 1, which is characterized in that the microwave generator is magnetic control Pipe.
6. multistage composite exhaust treatment system according to claim 1, which is characterized in that the cavity is erect-type chamber Body, top are provided with spray equipment, and lower part is provided with wastewater collection exhaust unit, the erect-type cavity lower part by pipeline with The connection of wastewater collection exhaust unit.
7. multistage composite exhaust treatment system according to claim 6, which is characterized in that the air inlet setting is being erect Formula cavity lower part, exhaust outlet are arranged on erect-type cavity top.
8. multistage composite exhaust treatment system according to claim 1, which is characterized in that the gas-filtering device uses Filter cotton filters the solid particle in exhaust gas.
9. multistage composite exhaust treatment system according to claim 1, which is characterized in that the gaseous oxidation device uses Ceramic base catalytic bed carries out oxidation processes to harmful substance remaining in exhaust gas under gas phase condition.
10. multistage composite exhaust treatment system according to claim 1, which is characterized in that described control unit uses can Program logic circuit is constituted.
CN201821917746.9U 2018-11-20 2018-11-20 Multistage composite exhaust treatment system Active CN209188472U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110694357A (en) * 2019-09-04 2020-01-17 徐州易尔环保科技有限公司 Workshop waste gas treatment method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110694357A (en) * 2019-09-04 2020-01-17 徐州易尔环保科技有限公司 Workshop waste gas treatment method

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