CN110354658A - Low-concentration organic exhaust gas micro-organism treatment process and its processing system - Google Patents
Low-concentration organic exhaust gas micro-organism treatment process and its processing system Download PDFInfo
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- CN110354658A CN110354658A CN201910720715.7A CN201910720715A CN110354658A CN 110354658 A CN110354658 A CN 110354658A CN 201910720715 A CN201910720715 A CN 201910720715A CN 110354658 A CN110354658 A CN 110354658A
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- 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
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- 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
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
Abstract
The present invention relates to technical field of waste gas treatment, more specifically, it relates to a kind of low-concentration organic exhaust gas micro-organism treatment process and its processing system.Wherein, low-concentration organic exhaust gas micro-organism treatment process includes the following steps: step S1: being handled using plasma and UV photodissociation exhaust gas, has ozone in the exhaust gas that makes that treated；Step S2: catalyst is utilized, the pollutant in ozone oxidation waste gas decomposition is made；Step S3: carrying out degradation treatment to step S2 treated exhaust gas using microorganism, with the gas after being purified.The technical solution provided according to the present invention, low-concentration organic exhaust gas is handled using catalyst+microbial cleaning group technology using plasma+UV photodissociation+ozone, its high treating effect, it is high-efficient to benzene homologues especially other organic pollutant removals, and cost of investment is moderate, late maintenance cost is lower, can be steady in a long-term up to standard, will not generate the secondary pollutions such as discarded active carbon.
Description
Technical field
The present invention relates to technical field of waste gas treatment, in particular to a kind of low-concentration organic exhaust gas micro-organism treatment process and
Its processing system.
Background technique
Currently, the processing for low-concentration organic exhaust gas, general on the market to use especially containing the organic exhaust gas of benzene homologues
Activated carbon adsorption or activated carbon adsorption+separating process.It is of course also possible to use the methods of plasma, UV photodissociation are handled, but wait
Ion, UV photodissociation equipment power consumption are high, and inefficiency, are extremely difficult to preferable treatment effect, need to cooperate active carbon toward contact
Absorbing process is used together.
In summary, preferable net in order to reach especially containing the organic exhaust gas of benzene homologues for low-concentration organic exhaust gas
Change effect, when being substantially all needs at present and use active carbon, however re-replacing after active carbon long-time service, replaces generation
Discarded active carbon belongs to dangerous waste article, is easy to produce secondary pollution, need to transfer to qualified processing processed in units, consumption mistake
Greatly, maintenance cost is higher.Therefore it is badly in need of improving in response to this.
Summary of the invention
In view of this, the present invention provides a kind of low-concentration organic exhaust gas micro-organism treatment process and its processing system, mainly
The technical problem to be solved is that how to reduce low-concentration organic exhaust gas is handled when two as caused by discarded active carbon
Secondary pollution.
In order to achieve the above objectives, present invention generally provides following technical solutions:
On the one hand, the embodiment of the present invention provides a kind of low-concentration organic exhaust gas micro-organism treatment process, includes the following steps:
Step S1: being handled exhaust gas using plasma and UV photodissociation, has ozone in the exhaust gas that makes that treated；
Step S2: catalyst is utilized, the pollutant in ozone oxidation waste gas decomposition is made；
Step S3: degradation treatment is carried out to treated exhaust gas using microorganism, with the gas after being purified.
By using above-mentioned technical proposal, processing for low-concentration organic exhaust gas, especially at the exhaust gas containing benzene homologues
Reason, key are the biggish pollutant of number molecular weight and benzene homologues, this type objects, which has, is insoluble in water, and stability is high, benzene series
Object also has the characteristics that toxicity is high, therefore very high to the processing requirement of benzene homologues, but rise lack in itself it is more intractable.Do not using work
Property charcoal absorption+hot stripping process in the case where, innovation is combined to original technique, using plasma+UV photodissociation+ozone utilization
Catalyst+microbial cleaning group technology handles such exhaust gas, high treating effect, to benzene homologues especially other
Organic pollutant removal is high-efficient, and cost of investment is moderate, and late maintenance cost is lower, can be steady in a long-term up to standard, will not produce
The secondary pollutions such as raw discarded active carbon.
The present invention is further arranged to: also exhaust gas pre-processed before step S1, makes the humidity 0%-95% of exhaust gas, temperature
Degree is 10 DEG C -35 DEG C.
By using above-mentioned technical proposal, exhaust gas keeps suitable humidity to help to generate more ozone in UV photodissociation
It can be made organic in exhaust gas with the organic matter of other in oxidation gaseous effluent with strong oxidative free radical OH, strong oxidative free radical OH
Object concentration is declined.In addition, ozone can also the efficiently organic contamination in oxygenolysis exhaust gas under the effect of the catalyst
Object improves the clean-up effect of exhaust gas further to purify to exhaust gas.And exhaust gas is maintained at suitable temperature, facilitate
The ozone organic pollutant in oxygenolysis exhaust gas under the effect of the catalyst.
The present invention is further arranged to: the processing time of exhaust gas in step sl is not less than 1 second；
Exhaust gas is passed through in catalyst reactor in step s 2 and carries out catalytic oxidation, the design reaction of catalyst reactor
Air speed is greater than 50000h-1；
The processing time of exhaust gas in step s3 is 6-15 seconds.
By using above-mentioned technical proposal, preferable waste gas purification effect can achieve, and keep exhaust gas with higher net
Change efficiency.
The present invention is further arranged to: the catalyst is the catalyst with porous structure.
By using above-mentioned technical proposal, the contact surface of the ozone and organic pollutant and catalyst in exhaust gas can be improved
Product, therefore, ozone under the effect of the catalyst, can more efficiently oxygenolysis organic pollutants.
On the other hand, the embodiment of the present invention also provides a kind of low-concentration organic exhaust gas microbe treatment system, packet
Include plasma UV equipment, catalyst reactor and biological purification tower；
The plasma UV equipment, for being handled using plasma and UV photodissociation exhaust gas, in the exhaust gas that makes that treated
With ozone；
The catalyst reactor, for making the pollutant in ozone oxidation waste gas decomposition using catalyst；
The biological purification tower, for carrying out degradation treatment to catalyst reactor treated exhaust gas using microorganism, with must
To purified gas.
By using above-mentioned technical proposal, plasma UV equipment, catalyst reactor and biological purification tower three cooperate,
Exhaust gas can be handled, high treating effect, it is high-efficient to benzene homologues especially other organic pollutant removals, and invest
Moderate cost, late maintenance cost is lower, can be steady in a long-term up to standard, will not generate the secondary pollutions such as discarded active carbon.
The present invention is further arranged to: the biological purification tower includes casing, water supply mechanism and loading pipe；
The casing is equipped with air inlet and exhaust outlet, and the water supply mechanism has feed water inlet；
The biologic packing material with microorganism is filled in the loading pipe, the loading pipe is arranged in the casing, and one end
It is connected to the feed water inlet, the other end is connected to the air inlet；The loading pipe be configured to from feed water inlet flow into water and from
Air inlet flow into gas homomergic flow to respective opposite other end pipe；
The side wall of the loading pipe is equipped with the first gas outlet, and first gas outlet is connected to the exhaust outlet.
By using above-mentioned technical proposal, due to being provided with the first gas outlet on the side wall of loading pipe, so that exhaust gas removes
It can flow, can also radially spread around along the axial direction of loading pipe, and be finally discharged from the first gas outlet.Relative to
The mode that exhaust gas can only be moved along the axial direction of packing layer in the prior art, the exhaust gas in technical solution of the present invention is due to may be used also
Radially to spread around, this kind of overcurrent form makes the overflow section of exhaust gas larger.In the biological tower of same cross-sectional area
Under, in the present invention flow area of exhaust gas it is big than the flow area of exhaust gas in existing standard biologic tower-times, so as to very big
Ground reduces flow velocity of the exhaust gas in packing layer, and exhaust gas is enable to come into full contact in packing layer with water and biomembrane, and then improves
Filter effect of the packing layer to VOCs organic exhaust gas.
The present invention is further arranged to: the biological purification tower further includes first partition；
The first partition is separated out air-inlet cavity in the casing, and the air inlet is arranged in the cavity wall of the air-inlet cavity；
The other end of the loading pipe is arranged in the first partition and is connected to by the air-inlet cavity with the air inlet；
The quantity of the loading pipe is more than two and is spaced apart from each other setting.
By using above-mentioned technical proposal, exhaust gas can flow into air-inlet cavity from air inlet, and air-inlet cavity can be played to useless
The effect that gas is pressed, then the exhaust gas in air-inlet cavity flows into corresponding loading pipe, so when the quantity of loading pipe is multiple,
Facilitate and is uniformly passed through exhaust gas into each loading pipe.
The present invention is further arranged to: the water supply mechanism includes water supplying pipe, and the water supplying pipe has the feed water inlet；
Described one end of each loading pipe is respectively connected with water supplying pipe, to be supplied water by corresponding water supplying pipe.
By using above-mentioned technical proposal, water supplying pipe can convey water into each loading pipe at a distance, install more clever
It is living.
The present invention is further arranged to: the biological purification tower further includes second partition；
Second partition setting has an interval in the casing and between the first partition, the first partition with
Packing cavity is formed between the second partition, each loading pipe is located in the packing cavity；
Described one end of each loading pipe is arranged on the second partition, and each water supplying pipe both passes through second partition and inserts
Enter described one end of corresponding loading pipe.
By using above-mentioned technical proposal, the both ends of loading pipe are fixed in the cooperation of both first partition and second partition respectively,
Stability of the loading pipe in casing so can be improved.
The present invention is further arranged to: the loading pipe is vertically placed, and the one end being connected with feed water inlet be upper end, with
One end that air inlet is connected is lower end.
By using above-mentioned technical proposal, the function of aforementioned filler pipe may be implemented, make from feed water inlet flow into water and from
The gas that air inlet flows into can flow to the respectively opposite other end along loading pipe.
By above-mentioned technical proposal, low-concentration organic exhaust gas micro-organism treatment process of the present invention and its processing system at least have
Have it is following the utility model has the advantages that
1, using plasma+UV photodissociation+ozone using catalyst+microbial cleaning group technology to low-concentration organic exhaust gas into
Row processing, high treating effect is high-efficient to benzene homologues especially other organic pollutant removals, and cost of investment is moderate, after
Phase maintenance cost is lower, can be steady in a long-term up to standard, will not generate the secondary pollutions such as discarded active carbon；
2, high to the purification efficiency of exhaust gas；
3, by the water conservancy diversion mode of exhaust gas in change biological purification tower, cross sectional flow rate of the exhaust gas inside filler is greatly reduced,
It is excessive to efficiently solve section wind speed, filler easily blocks the drawbacks of needing periodic cleaning；
4, the filler in biological purification tower is huddled and is changed to regular formula tubular type filling, reduce the risk of the short stream of exhaust gas.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is a kind of flow chart for low-concentration organic exhaust gas micro-organism treatment process that one embodiment of the invention provides；
Fig. 2 is a kind of structural schematic diagram for biological purification tower that one embodiment of the invention provides.
Appended drawing reference: 1, casing；2, water supply mechanism；3, loading pipe；4, first partition；5, air-inlet cavity；6, packing cavity；7,
Two partitions；8, aeration tube；9, outlet pipe；21, water supplying pipe；22, sink；51, water storage tank；71, the second gas outlet；101, air inlet
Mouthful；102, exhaust outlet；103, discharge chamber；201, feed water inlet；100, biological purification tower.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.It is to be appreciated that if related in the embodiment of the present invention directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture)
Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do the description of " first ", " second " etc. only if relating to the description of " first ", " second " etc. in the embodiment of the present invention
For descriptive purposes, it is not understood to indicate or imply its relative importance or implicitly indicates indicated technical characteristic
Quantity." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one of the features.
As shown in Figure 1, a kind of low-concentration organic exhaust gas micro-organism treatment process that one embodiment of the present of invention proposes,
Include the following steps:
Step S1: being handled exhaust gas using plasma and UV photodissociation, has ozone in the exhaust gas that makes that treated.Such as it can
To be handled using plasma UV all-in-one machine exhaust gas.Plasma UV all-in-one machine has plasma chamber and UV photodissociation chamber.It is low dense
Degree organic exhaust gas can be introduced into plasma chamber, be generated brought by plasma in waste gas absorption plasma chamber as high voltage electric field
Energy, the macromolecular Direct Pyrolysis in exhaust gas are small-molecule substance, the benzene homologues with Plasma contact, and benzene ring structure obtains
It destroys, so as to remove part benzene homologues.Simultaneously under high voltage electric field discharge condition, oxygen and hydrone in exhaust gas can
OH and ozone are generated free radicals under the action of high energy electron, free radical OH has Strong oxdiative ability, can be with oxidation gaseous effluent
In other organic matters, decline organic concentration.Exhaust gas after plasma treated, organic concentration have to a certain degree
It reduces, while this kind of by-product of ozone can be generated.Subsequently into UV photodissociation chamber, the organic pollutant of non-benzene homologues can be in UV light
Small-molecule substance is directly oxidized under irradiation, while dioxygen oxidation can also be ozone by UV photodissociation, it is more after plasma treatment
Remaining ozone is mixed with the ozone of the intracavitary generation of UV photodissociation, and ozone concentration is made to get a promotion.Ozone and UV light are under synergistic effect
Oxidable decomposition benzene homologues and other macromolecular hardly degraded organic substances, therefore the concentration of the benzene homologues in exhaust gas can further drop
It is low, while the organic concentration in exhaust gas is also reduced, and is mixed with the residual ozone of higher concentration.
Step S2: catalyst is utilized, the pollutant in ozone oxidation waste gas decomposition is made.For example it can use catalyst reaction
Treated that exhaust gas is handled to step S1 for device.Catalyst is equipped in catalyst reactor, which is ozone utilization
Catalyst.Both organic pollutant and ozone in exhaust gas make needed for the reaction of pollutant in conjunction with the active site of catalyst
Activation energy reduces, therefore ozone is under the effect of the catalyst, can efficiently oxygenolysis organic pollutant, benzene homologues difficult to degrade
Also it is degraded to the greatest extent under the effect of the catalyst.Exhaust gas after step S2 processing, wherein Benzene series Concentrations have 30%
~ 50% decline, total VOCs concentration have 20% ~ 30% decline.
Step S3: degradation treatment is carried out to treated exhaust gas using microorganism, with the gas after being purified.Than
It such as can to step S2, treated that exhaust gas is handled using biological purification tower.Wherein, through plasma, UV photodissociation and ozone benefit
With the exhaust gas of catalyst treatment, organic pollutant average molecular weight has to be declined by a relatively large margin, wherein benzene homologues difficult to degrade also obtain
To initial breakdown, product is the substance that aldehydes, acids etc. are dissolved in water, thus it is subsequent again using microorganism to exhaust gas at
Reason, aldehydes, acid are soluble in water degradable by microorganism, and other have been initially oxidised the substance of degradation, because of concentration
It has been reduced that, can also have been removed after microbiological treatment.In addition, greatly reducing microorganism due to the decline of Benzene series Concentrations
The load of processing, therefore biological purification tower has enough abilities degradable to remaining benzene homologues and the progress of other substances.Through life
The low concentration organic exhaust gas containing benzene homologues of object purifying column processing, Benzene series Concentrations have 50% ~ 70% decline, and total VOCs concentration has
60% ~ 80% decline.
By above-mentioned technological design, processing for low-concentration organic exhaust gas, especially containing the exhaust-gas treatment of benzene homologues,
Key is the biggish pollutant of number molecular weight and benzene homologues, this type objects, which has, is insoluble in water, and stability is high, and benzene homologues are also
Have the characteristics that toxicity is high, therefore very high to the processing requirement of benzene homologues, but rise lack in itself it is more intractable.Do not using active carbon
In the case where absorption+hot stripping process, innovation is combined to original technique, catalysis is utilized using plasma+UV photodissociation+ozone
Agent+microbial cleaning group technology handles such exhaust gas, high treating effect, and to benzene homologues, especially other are organic
Contaminant removal efficiency is high, and cost of investment is moderate, and late maintenance cost is lower, can be steady in a long-term up to standard, will not generate useless
Abandon the secondary pollutions such as active carbon.
Further, exhaust gas can also be pre-processed before step S1, makes the humidity 0%-95% of exhaust gas, temperature 10
℃-35℃.Preferably, the humidity of exhaust gas is 47.5%, and temperature is 22.5 DEG C.Wherein, exhaust gas keeps suitable humidity to facilitate
More ozone and strong oxidative free radical OH are generated when UV photodissociation, strong oxidative free radical OH can be with other in oxidation gaseous effluent
Organic matter declines the organic concentration in exhaust gas.In addition, ozone can also be aoxidized efficiently under the effect of the catalyst
Organic pollutant in waste gas decomposition improves the clean-up effect of exhaust gas further to purify to exhaust gas.And exhaust gas is kept
In suitable temperature, facilitate organic pollutant of the ozone under the effect of the catalyst in oxygenolysis exhaust gas.
Further, the processing time of aforementioned exhaust gas in step sl is not less than 1 second.Exhaust gas is passed through in step s 2 and is urged
Catalytic oxidation is carried out in agent reactor, the design reaction velocity of catalyst reactor should be greater than 50000h-1.Exhaust gas is in step
The processing time in rapid S3 is 6-15 seconds.Pass through above-mentioned setting, it can reach preferable waste gas purification effect, and make exhaust gas
Purification efficiency with higher.
Further, catalyst above-mentioned can be the catalyst with porous structure, so can be improved in exhaust gas
The contact area of ozone and organic pollutant and catalyst, therefore, ozone under the effect of the catalyst, can be aoxidized more efficiently
Decomposing organic pollutant.
What needs to be explained here is that: above-mentioned catalyst can be MCM-41, SBA-15 or SiO2Deng.
The present invention also provides a kind of low-concentration organic exhaust gas microbe treatment systems comprising plasma UV equipment, catalysis
Agent reactor and biological purification tower 100.Plasma UV equipment is made for being handled using plasma and UV photodissociation exhaust gas
Treated, and exhaust gas is interior with ozone.Catalyst reactor is used to make the pollution in ozone oxidation waste gas decomposition using catalyst
Object.Biological purification tower 100 is used to carry out degradation treatment to catalyst reactor treated exhaust gas using microorganism, to obtain only
Gas after change.
Above-mentioned plasma UV equipment, catalyst reactor and 100 three of biological purification tower cooperation, can to exhaust gas into
Row processing, high treating effect is high-efficient to benzene homologues especially other organic pollutant removals, and cost of investment is moderate, after
Phase maintenance cost is lower, can be steady in a long-term up to standard, will not generate the secondary pollutions such as discarded active carbon.Its specific treatment process
It may refer to above describe accordingly, details are not described herein.
What needs to be explained here is that: above-mentioned plasma UV equipment can be plasma UV photodissociation all-in-one machine, and catalyst is anti-
Answering device can be ozone eliminator, and the structure of the two is common technology in the prior art, can according to need in the prior art
Middle selection, details are not described herein.
As shown in Fig. 2, biological purification tower 100 above-mentioned may include casing 1, water supply mechanism 2 and loading pipe 3.Casing 1 is
Hollow structure inside, casing 1 are used to provide shell protection for other component.Casing 1 is equipped with air inlet 101 and exhaust outlet 102.
VOCs exhaust gas can enter in casing 1 from air inlet 101, and purified gas can be discharged from exhaust outlet 102.Water supply mechanism 2
With feed water inlet 201.
The biologic packing material for purification gas is filled in loading pipe 3.Loading pipe 3 is preferably straight tube structure, and loading pipe 3 is used
In accommodating biologic packing material, installation space is provided for biologic packing material.Biologic packing material can be bought in the market, such as can be using having
Machine fiber or inorfil etc..After biologic packing material is filled in loading pipe 3, there is gap between biologic packing material, make exhaust gas and water
It can be passed through between biologic packing material.
Loading pipe 3 is arranged in casing 1, it is preferred that loading pipe 3 is fixed in casing 1.One end of loading pipe 3 and water supply
201 connection of mouth, the other end are connected to air inlet 101.Loading pipe 3 is configured to the water flowed into from feed water inlet 201 and from air inlet 101
The gas homomergic flow of inflow is to the pipe of respective opposite other end, and specifically, the water of feed water inlet 201 is flowed from one end of loading pipe 3
It can be flow to the other end i.e. inlet end along loading pipe 3 after entering, likewise, the gas of air inlet 101 is flowed into from one end of loading pipe 3
After can flow to the other end i.e. water inlet end along loading pipe 3.
The side wall of loading pipe 3 is equipped with the first gas outlet, and the first gas outlet is connected to exhaust outlet 102, from the first gas outlet
The gas of outflow can be discharged from exhaust outlet 102.Wherein, the quantity of the first gas outlet can be multiple and be covered with loading pipe 3
Sidewall surfaces, to improve outlet efficiency of the exhaust gas on loading pipe 3.
In the above-mentioned technical solutions, water supply mechanism 2 is supplied water into loading pipe 3 by feed water inlet 201, and water is from loading pipe 3
One end flow to inlet end；Meanwhile the VOCs exhaust gas flowed into from air inlet 101 is also flowed into from the other end of loading pipe 3, and along filler
Pipe 3 flow to water inlet end, and in brief, water and VOCs exhaust gas are flowed into from the both ends of loading pipe 3 in opposite direction respectively.In air pressure
Under the action of, exhaust gas is spread around in filler, and exhaust gas comes into full contact with during diffusion with flowing water in filler, complete
At the dissolution of pollutant, adsorption process in exhaust gas, then pollutant is realized by the microbial degradation of filler surface to the net of exhaust gas
Change.
Wherein, due to being provided with the first gas outlet on the side wall of loading pipe 3, so that exhaust gas is in addition to can be along loading pipe 3
Axial flowing, can also radially spread around, and be finally discharged from the first gas outlet.Middle exhaust gas compared with the existing technology
The mode that can only move along the axial direction of packing layer, exhaust gas in technical solution of the present invention is due to can also radially around
Diffusion, this kind of overcurrent form make the overflow section of exhaust gas larger.Under the biological tower of same cross-sectional area, exhaust gas in the present invention
Flow area it is 10-15 times big than the flow area of exhaust gas in existing standard biologic tower, so as to greatly reduce exhaust gas
Flow velocity in packing layer, enables exhaust gas to come into full contact in packing layer with water and biomembrane, and then improves packing layer pair
The filter effect of VOCs organic exhaust gas.
In addition, due to the reduction of flow velocity, so that exhaust gas becomes smaller to the impact of filler surface biomembrane, thus filler surface
Biomembrane is not easily to fall off, and service life is longer.
Further, as shown in Fig. 2, biological purification tower 100 of the invention can also include first partition 4, first partition 4
Air-inlet cavity 5 is separated out in casing 1, air inlet 101 above-mentioned is arranged in the cavity wall of air-inlet cavity 5.Loading pipe 3 it is described another
End is arranged in first partition 4 and is connected to by air-inlet cavity 5 with air inlet 101 above-mentioned.First partition 4 is preferably in plate
Shape, first partition 4 provide installation position for separating air-inlet cavity 5 and loading pipe 3, and for loading pipe 3, consolidate loading pipe 3
Dingan County is in first partition 4.The quantity of aforementioned filler pipe 3 is more than two and is spaced apart from each other setting.Wherein, first partition 4
On in the position opposite with each loading pipe 3 be equipped with overcurrent mouth so that the other end of each loading pipe 3 passes through accordingly
Overcurrent mouth is connected to air-inlet cavity 5.Specifically, exhaust gas can flow into air-inlet cavity 5 from air inlet 101, and air-inlet cavity 5 can play
To the effect that exhaust gas is pressed, then the exhaust gas in air-inlet cavity 5 flows into corresponding loading pipe 3 from each overcurrent mouth, so works as filler
When the quantity of pipe 3 is multiple, facilitates and be uniformly passed through exhaust gas into each loading pipe 3.
In order to realize the water supply function of aforementioned water supply mechanism 2, the present invention also provides following embodiments, as shown in Fig. 2,
Water supply mechanism 2 may include water supplying pipe 21, and water supplying pipe 21 has feed water inlet 201 above-mentioned.Described one end of each loading pipe 3 connects
It is connected to water supplying pipe 21, to supply water by corresponding water supplying pipe 21.Wherein, each loading pipe 3 can connect more than one water supply
Pipe 21, it is preferred that each loading pipe 3 connects two water supplying pipes 21.Water supplying pipe 21 is generally hose, can be at a distance to respectively filling out
Water is conveyed in expects pipe 3, is installed more flexible.
Further, as shown in Fig. 2, water supply mechanism above-mentioned 2 can also include sink 22, deviating from for each water supplying pipe 21 is supplied
The inside of one end connection sink 22 at the mouth of a river 201.The preferred square in shape of sink 22, the upper end opening of sink 22.By setting
The sink 22 set can be unified to supply water to each water supplying pipe 21.
Wherein, in order to flow to the water in sink 22 in each water supplying pipe 21, confession can be pumped water to using water pump etc.
In water pipe 21, water supplying pipe 21 can also be arranged in the lower section of sink 22, allow water in sink 22 under gravity
It flow in each water supplying pipe 21.
Preferably, as shown in Fig. 2, sink 22 can be arranged in the top of loading pipe 3, water supplying pipe 21 be located at sink 22 with
Between loading pipe 3, the water in sink 22 is flow under gravity in water supplying pipe 21, then flow to loading pipe along water supplying pipe 21
3.Due to the power device without additional setting pumping water, water only flows under the action of self-weight, and cost is relatively low for implementation.
In order to which further loading pipe 3 is fixed, it is preferred that as shown in Fig. 2, biological purification tower 100 of the invention is also
It may include second partition 7.Second partition 7 is preferably in tabular.Second partition 7 is arranged in casing 1, it is preferred that second
Partition 7 is fixed in casing 1.There is interval between second partition 7 and first partition 4.Between first partition 4 and second partition 7
Packing cavity 6 is formed, each loading pipe 3 is located in packing cavity 6.Described one end of each loading pipe 3 is arranged on second partition 7, excellent
Choosing, described one end of loading pipe 3 is fixed on second partition 7.Each water supplying pipe 21 above-mentioned both passes through second partition 7 and is inserted into phase
Described one end of loading pipe 3 is answered, to supply water into corresponding loading pipe 3.
In the technical solution of above-mentioned offer, loading pipe 3 is fixed in the cooperation of both first partition 4 and second partition 7 respectively
Stability of the loading pipe 3 in casing 1 so can be improved in both ends.
For the effect that the first gas outlet realized on aforementioned filler pipe 3 is connected to exhaust outlet 102, as shown in Fig. 2, exhaust
Mouth 102 is located at the sides away from packing cavity 6 of second partition 7 and the formation discharge chamber 103 between second partition 7.Second partition
7 are equipped with the second gas outlet 71 of connection packing cavity 6 and discharge chamber.
By above-mentioned setting, after the gas in loading pipe 3 flow to packing cavity 6 from the first gas outlet, can via second every
The second gas outlet 71 on plate 7 flow to discharge chamber, finally flows out from exhaust outlet 102.Wherein, discharge chamber 103 can be to from filler
The gas that chamber 6 flows into is pressed, and is then unified for gas to be discharged from exhaust outlet 102, so can be prevented air pressure unevenness from making to casing 1
At damage, the service life of casing 1 is influenced.
Further, in order to realize the function of aforementioned filler pipe 3, make the water flowed into from feed water inlet 201 and from air inlet 101
The gas of inflow can flow to the respectively opposite other end along loading pipe 3, and the present invention also provides following embodiments, such as Fig. 2
Shown, loading pipe 3 above-mentioned is vertically placed, and the one end being connected with feed water inlet 201 is connected for upper end, with air inlet 101
One end be lower end, in this way, water flow can flow to the inlet end of loading pipe 3 when flowing into from feed water inlet 201 under gravity,
Likewise, from the gas that air inlet 101 flows into the other end i.e. water inlet end can also be flow to along loading pipe 3 under the influence of air pressure.
In order to improve the outlet efficiency of exhaust gas in loading pipe 3, it is preferred that loading pipe 3 is the pipe in reticular structure, this is netted
The mesh of structure is as the first gas outlet above-mentioned.
Further, as shown in Fig. 2, water storage tank 51, air inlet 101 above-mentioned can be formed on the bottom of aforementioned air-inlet cavity 5
Positioned at the top of water storage tank 51.Water in loading pipe 3 can be fallen under gravity in water storage tank 51.Water storage tank 51 can
To collect the water flowed out from loading pipe 3, the waste of water resource is avoided.
What needs to be explained here is that: as shown in Fig. 2, outlet pipe 9, the outlet pipe 9 can be equipped in first partition above-mentioned 4
For the water in first partition 4 to be directed in water storage tank 51.Specifically, when water flows in loading pipe 3, some water meeting
It flows in packing cavity 6, and is deposited in first partition 4 from the first gas outlet of loading pipe 3, and by the outlet pipe 9 of setting, it can
The water being deposited in first partition 4 to be exported in water storage tank 51.
Preferably, biological purification tower 100 of the invention can also include pipeline pump, and pipeline pump is used for will be in water storage tank 51
In water pump to sink 22 above-mentioned, to realize recycling for water resource.
Further, as shown in Fig. 2, biological purification tower 100 of the invention can also include aeration tube 8, aeration tube 8 is protruded into
In water storage tank 51.In actual application, there is a large amount of suspension microorganism, by aeration tube 8 to water storage in water storage tank 51
Aeration aerating in slot 51 creates aerobic condition, and microorganism is allow to continue the pollution that degradation is not completed in degradation in loading pipe 3
Object.
The working principle and preferred embodiment of biological purification tower of the invention is described below.
Biological purification tower 100 of the invention can use the structure type of tower body, in certain applications, life of the invention
Object purifying column 100 can also be referred to as biological tower.Wherein, sink 22 above-mentioned, discharge chamber 103, packing cavity 6 and air-inlet cavity 5 can
To set gradually from top to bottom.Sometimes water storage tank 51 can also be referred to as biological cycle water tank, and discharge chamber 103 is referred to as
Bellows, packing cavity 6 are referred to as packing layer, and air-inlet cavity 5 is referred to as inlet box.The main body load-bearing side of biological purification tower 100 of the present invention
Formula can use steel structure column, Liang Zuowei main support.1 inside supporting point of casing is respectively positioned on crossbeam, it is ensured that tower structure is firm.
Biological tower periphery steel plate is connected with each other using plate folding type, is greatly increased through folded plate is powerful, thus by plate and plate,
The connection of plate and crossbeam, plate and structural column, crossbeam and structural column can form the external structure of biological tower, and accordingly enclose into
Bellows, packing layer and air outlet box region.
Biological cycle water tank is located at biological tower bottom, by the welded connecting between plate at cube water storage, biological cycle
Water tank bottom is furnished with aeration tube 8, and aeration tube 8 is the form of PVC water pipe opening, is uniformly exposed to entire biological cycle water tank
Gas.After steel plate folds at the top of biological cycle water tank surrounding, it is connect with the steel plate of inlet box periphery.Inlet box upper end connecting cross beam,
And the supporting elements such as square tube are welded on crossbeam, it is laid with packing layer bottom plate (first partition 4 i.e. above-mentioned) in square tube, filler is with bottom plate
As bearing, filler stacked in multi-layers, usual packing layer is laid with 3 ~ 4 layers, 3 ~ 4 meters of bed stuffing height；Packing layer top square tube, angle
The profiles such as iron are fixed on second partition 7, avoid packing layer (loading pipe 3 i.e. above-mentioned) crooked.It is outlet air above packing layer
Case (discharge chamber 103 i.e. above-mentioned), gas discharge after collecting in air outlet box from exhaust outlet 102.Cover board is laid at the top of air outlet box,
Cover board is through folded convex steel plate, and cover board is overlapped laying two-by-two and guarantees biological tower Integral sealing.Overhead water is placed on cover board
Slot 22(, that is, sink 22 above-mentioned), PVC water pipe (water supplying pipe 21 i.e. above-mentioned) is connected after 22 aperture of sink as the confession of each loading pipe 3
Water, each sink 22 are that two rows of biologic packing material pipes 3 supply water.
The working principle of biological purification tower 100: overall to be divided into gas process and liquid flow.Gas process is as follows: exhaust gas
After the entrance of air inlet 101, after inlet box (air-inlet cavity 5 i.e. above-mentioned) is pressed, pass through bottom plate (first partition 4 i.e. above-mentioned)
Into each loading pipe 3, exhaust gas is spread around in loading pipe 3 under the influence of air pressure, and gas is during slow diffusion
It is come into full contact with the microorganism of filler surface and the liquid of decline, completes dissolution, the adsorption process of pollutant, then by biological benefit
With degradation.After the pollutant in exhaust gas dissolves, gas is purified, when gas radially diffuses to loading pipe 3 from center
It is detached from behind periphery from the first gas outlet, purified gas collects and rises in the gap between loading pipe 3 and loading pipe 3
Air outlet box (discharge chamber 103 i.e. above-mentioned), leaves biological tower qualified discharge through exhaust outlet 102.Liquid flow is as follows: tower bottom water tank
(water storage tank 51 i.e. above-mentioned) interior biological cycle water is delivered to biological tower tower top sink 22 through pipeline pump, and liquid passes through in sink 22
Downspout (water supplying pipe 21 i.e. above-mentioned) gravity flow enters in loading pipe 3, also by self-flowing effect from upper between upper and lower level filler
All fillers are flowed through under and, eventually arrive at the outflow of filler bottom, the liquid of outflow is through the downspout of bottom plate (i.e. first partition 4)
Or biological tower water tank (i.e. water storage tank 51) is flowed into through filler hollow space, liquid recycles always since then.Still have in biological water tank
A large amount of suspension microorganisms carry out aeration aerating to water tank, create aerobic condition, so that microorganism is continued degradation and do not complete in packing layer
The pollutant of degradation.
What needs to be explained here is that: in the absence of conflict, those skilled in the art can according to the actual situation by
Relevant technical characteristic is combined with each other in above-mentioned each example, to reach corresponding technical effect, particularly for various combined situations
It will not repeat them here.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of low-concentration organic exhaust gas micro-organism treatment process, which comprises the steps of:
Step S1: being handled exhaust gas using plasma and UV photodissociation, has ozone in the exhaust gas that makes that treated；
Step S2: catalyst is utilized, the pollutant in ozone oxidation waste gas decomposition is made；
Step S3: degradation treatment is carried out to treated exhaust gas using microorganism, with the gas after being purified.
2. low-concentration organic exhaust gas micro-organism treatment process according to claim 1, which is characterized in that
Also exhaust gas is pre-processed before step S1, makes the humidity 0%-95% of exhaust gas, temperature is 10 DEG C -35 DEG C.
3. low-concentration organic exhaust gas micro-organism treatment process according to claim 1 or 2, which is characterized in that
The processing time of exhaust gas in step sl is not less than 1 second；
Exhaust gas is passed through in catalyst reactor in step s 2 and carries out catalytic oxidation, the design reaction of catalyst reactor
Air speed is greater than 50000h-1；
The processing time of exhaust gas in step s3 is 6-15 seconds.
4. low-concentration organic exhaust gas micro-organism treatment process according to claim 1 or 2, which is characterized in that
The catalyst is the catalyst with porous structure.
5. a kind of low-concentration organic exhaust gas microbe treatment system, which is characterized in that including plasma UV equipment, catalyst reaction
Device and biological purification tower (100)；
The plasma UV equipment, for being handled using plasma and UV photodissociation exhaust gas, in the exhaust gas that makes that treated
With ozone；
The catalyst reactor, for making the pollutant in ozone oxidation waste gas decomposition using catalyst；
The biological purification tower (100), for using microorganism to catalyst reactor treated exhaust gas progress degradation treatment,
With the gas after being purified.
6. low-concentration organic exhaust gas microbe treatment system according to claim 5, which is characterized in that the biological cleaning
Tower (100) includes casing (1), water supply mechanism (2) and loading pipe (3)；
The casing (1) is equipped with air inlet (101) and exhaust outlet (102), and the water supply mechanism (2) has feed water inlet (201)；
The biologic packing material with microorganism is filled in the loading pipe (3), the loading pipe (3) is arranged in the casing (1)
It is interior, and one end is connected to the feed water inlet (201), the other end is connected to the air inlet (101)；Loading pipe (3) configuration
For the water flowed into from feed water inlet (201) and from the gas homomergic flow that air inlet (101) flow into the pipe of respective opposite other end；
The side wall of the loading pipe (3) is equipped with the first gas outlet, and first gas outlet is connected to the exhaust outlet (102).
7. low-concentration organic exhaust gas microbe treatment system according to claim 6, which is characterized in that the biological cleaning
Tower further includes first partition (4)；
The first partition (4) is separated out air-inlet cavity (5) in the casing (1), air inlet (101) setting it is described into
In the cavity wall of wind chamber (5)；The other end of the loading pipe (3) be arranged on the first partition (4) and by it is described into
Wind chamber (5) is connected to the air inlet (101)；
The quantity of the loading pipe (3) is more than two and is spaced apart from each other setting.
8. low-concentration organic exhaust gas microbe treatment system according to claim 7, which is characterized in that
The water supply mechanism (2) includes water supplying pipe (21), and the water supplying pipe (21) has the feed water inlet (201)；
Described one end of each loading pipe (3) is respectively connected with water supplying pipe (21), to be supplied water by corresponding water supplying pipe (21).
9. low-concentration organic exhaust gas microbe treatment system according to claim 8, which is characterized in that the biological cleaning
Tower further includes second partition (7)；
The second partition (7) setting has an interval in the casing (1) and between the first partition (4), and described the
Packing cavity (6) are formed between one partition (4) and the second partition (7), each loading pipe (3) is located at the packing cavity (6)
It is interior；
Described one end of each loading pipe (3) is arranged on the second partition (7), and each water supplying pipe (21) both passes through
Second partition (7) is inserted into described one end of corresponding loading pipe (3).
10. low-concentration organic exhaust gas microbe treatment system according to any one of claims 6 to 9, which is characterized in that
The loading pipe (3) is vertically placed, and is connected with one end that feed water inlet (201) are connected for upper end, with air inlet (101)
Logical one end is lower end.
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