CN106731481A - A kind of activated carbon cyclone adsorbing processes the method and apparatus of VOC waste gas - Google Patents
A kind of activated carbon cyclone adsorbing processes the method and apparatus of VOC waste gas Download PDFInfo
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- CN106731481A CN106731481A CN201710061520.7A CN201710061520A CN106731481A CN 106731481 A CN106731481 A CN 106731481A CN 201710061520 A CN201710061520 A CN 201710061520A CN 106731481 A CN106731481 A CN 106731481A
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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
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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Abstract
本发明涉及一种活性炭旋流吸附处理VOC废气的方法与设备。该方法为：一种碳基吸附/催化双功能材料与VOCs废气在混合吸附罐内预混合，混合后的物料送至旋流吸附系统，实现多次吸附分离，净化达标的气体由引风机排至外网管，富含VOCs碳基吸附/催化颗粒从吸附分离器输送至后续处理装置。所述的改性活性炭在碳基载体上分散加载铁相纳米活性中心，构建碱性表面官能团，形成碳基吸附/催化材料。本发明还提供了一种活性炭旋流吸附处理VOC废气设备。本发明采用改性碳基材料制备吸附/催化双功能介质，具有高效，低污染，优化方法流程和降低操作难度的优点。适用于多种VOC废气处理系统。
The invention relates to a method and equipment for activated carbon cyclone adsorption treatment of VOC waste gas. The method is as follows: a carbon-based adsorption/catalysis dual-functional material is pre-mixed with VOCs waste gas in a mixed adsorption tank, and the mixed material is sent to a swirl adsorption system to achieve multiple adsorption separations, and the purified gas is exhausted by an induced draft fan To the external network pipe, the carbon-based adsorption/catalytic particles rich in VOCs are transported from the adsorption separator to the subsequent treatment device. The modified activated carbon disperses and loads iron-phase nanometer active centers on a carbon-based carrier, constructs basic surface functional groups, and forms a carbon-based adsorption/catalysis material. The invention also provides an activated carbon cyclone adsorption treatment VOC waste gas equipment. The invention adopts the modified carbon-based material to prepare the adsorption/catalysis dual-function medium, and has the advantages of high efficiency, low pollution, optimized method flow and reduced operation difficulty. Applicable to a variety of VOC exhaust gas treatment systems.
Description
Technical field
The present invention is applied to various VOC exhaust-gas treatments fields, is related to a kind of modified activated carbon absorption low concentration VOCs's
Processing method, it is adaptable to low concentration VOC removal process.Specifically, the invention provides using a kind of activated carbon cyclone adsorbing
Process the method and apparatus of VOC waste gas.
Background technology
VOC (volatile organic compounds), abbreviation VOCs is organic compound
It is referred to as, it not only can produce harm to atmospheric environment, while influence whether that people's is healthy, mainly including ketone, hydro carbons, virtue
Hydro carbons, aldehydes, alcohols, lipid, amine and organic acid etc., then organic gas volatile, irritant and poisonous under normal temperature
Body.
The adsorbent that activated carbon is operated as adsorbing separation is commonly used in industry, activated carbon has feature：Selectively strong,
Specific surface area is larger, pore diameter range is wide, surface is rich in various functional groups, stable performance and can regenerate etc..It is active at present
Charcoal pore structure and surface functional group are the main factors for influenceing charcoal absorption, and especially active carbon pore structure is to its adsorptivity
Decisive role can be produced.The regeneration of activated carbon can be using methods such as chemical oxidation, medicament wash-out, biodegradation, thermal regenerations.
Ania etc. uses HNO respectively3(NH4)S2O8Commercial activated carbons are modified, discovery is modified in low concentration oxygen agent can
To increase the quantity of micropore and mesopore.Li and Lillo-Rodenas etc. selects the modified activated carbon of different structure, to Low Concentration of Benzene
Absorption research is carried out with toluene, it is found that dominating role is played in VOCs absorption of the micropore less than 0.7nm to low concentration.Hsieh etc.
Have studied various VOCs absorption property distributions on the activated carbon, it is indicated that size, structure, polarity of VOCs molecules etc. can influence
Absorption behavior.
According to adsorption plant it is different according to adsorption plant difference can be divided into preventing fixed bed adsorber, fluidised bed adsorption device and
Moving bed adsorbent equipment.Preventing fixed bed adsorber mainly has vertical and horizontal two kinds, and structure is relatively simple, apparatus body cost
Low, easy manipulation.Fluidised bed adsorption device makes adsorbent be in suspended motion state using gas, and waste gas and adsorbent can be allowed abundant
Contact, bed is shallow, crushing is small, energy consumption is low, have the advantages that continuous operation, low pressure drop, conduct heat it is good.Moving bed adsorbent equipment makes to give up
Gas is continuously and uniformly being moved in reactor, is stably input into and is exported, and is capable of achieving adverse current and is operated continuously, but structure is relative
It is complicated.However, existing adsorbent equipment is generally bulky, reprocessing facility is various, for the VOCs waste gas of large-wind-volume low-concentration,
Once investment increases and operation maintenance expense is higher.There is scholar to propose using former materials such as ceramic fiber paper, glass fibre, asbestos in the recent period
Material be fabricated to adsorption runner, on runner simultaneously complete VOCs waste gas desorption and adsorbent reactivation process, this thinking with this
Subject study target is approached, but such systematic research is still in the starting stage, and technology is also immature.
Therefore, this area being capable of reduces cost, simplified system, while the eddy flow for improving effect is inhaled in the urgent need to developing one kind
The method and apparatus of attached technical finesse VOC waste gas.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of activated carbon cyclone adsorbing treatment VOC waste gas
Method and apparatus.
A kind of method that activated carbon cyclone adsorbing processes VOC waste gas, it is characterised in that：
Under Flux Valve Control, the modified activated carbon for being loaded with iron phase nano active center will be disperseed to be conveyed through charge pump
To mixing and absorption device, the VOCs in preliminary absorption waste gas in mixing and absorption device；Material delivers to one-level cyclone adsorbing point after mixing
From device, in the case where three-dimensional rotation flow field acts on, activated carbon granule is set to produce rotation, it is ensured that activated carbon surface remains that absorption is lived
Property, efficient absorption effect is produced to VOCs；Gas delivers to two grades of cyclone adsorbing separators after once adsorbing, and realizes secondary more high-precision
Degree adsorbing separation；Gas is incorporated to outer discharge pipe after purification, and outer comb net is delivered to through air-introduced machine.Activated carbon rich in VOCs is from rotation
The outflow of stream adsorbing separation device bottom, is incorporated to after-treatment system.
Preferably, described modified activated carbon disperses loading iron phase nano active center in carbon-based supports, builds alkalescence
Surface functional group (such as methoxyl group, phenolic hydroxyl group, pyrroles), forms carbon-based absorption/catalysis material, can increase unit sorbing material body
Long-pending VOC adsorption capacities.
Preferably, described carbon-based absorption/catalysis material needed in preparation process precise control Fe presomas form and
Decentralization, so as to realize the regulation and control of Fe nano-particle yardsticks.
Preferably, described mixing and absorption device sets many, can connect in parallel or series, to ensure subsequent purification device
Continuous and steady operation.
Preferably, described cyclone adsorbing system entry VOC concentration is in 0~3000mg/m3。
On the other hand, the invention provides the equipment that a kind of activated carbon cyclone adsorbing processes VOC waste gas, the equipment includes：
I grade of cyclone adsorbing separator, for carrying out once high accuracy VOC absorption and gas solid separation；
II grade of cyclone adsorbing separator, for carrying out a higher precision VOC absorption and gas solid separation；
The mixing and absorption device being connected with cyclone adsorbing separator, for realize VOCs waste gas and modified activated carbon mixing and
Preliminary absorption；
Charge pump and air-introduced machine, for providing material conveying；
Flow control valve, for adjusting mass flow.
Preferably, described cyclone adsorbing separator plural serial stage, VOC adsorption efficiencies are up to more than 98%, pollutant emission
Better than national newest standards.
Preferably, the solid particle separative efficiency of described cyclone adsorbing separator is up to more than 99%.
Preferably, described mixing and absorption device is provided with two feed pipes in top and bottom, and side is provided with discharging opening.
Preferably, at described flow control valve series hybrid absorber import, for control material mixed proportion.
Method of the present invention feature is as follows：
(1) activated carbon is pre-mixed with VOCs waste gas and tentatively adsorbs VOCs waste gas, effectively raises the absorption of VOCs
Effect.
(2) modified activated carbon at iron phase nano active center is loaded with as adsorbent from dispersion, can increase substantially
The capacity rate and adsorption rate of VOCs.
(3) Multi-stage spiral adsorbers serial or parallel connection are used, higher precision VOCs absorption and gas solid separation is realized, it is ensured that living
The rate of recovery of property charcoal is up to more than 99%.
Equipment feature of the invention is as follows：
(1) replace conventional fluidization bed and fixed bed from cyclone adsorbing bed, realize activated carbon quick adsorption VOCs, by stream
Field rotation, it is ensured that VOCs concentration differences remain high-order.
The equipment is easy of integration, and diameter is small, reduces total floor space and the gross investment of device.
Brief description of the drawings
Fig. 1 is the schematic diagram figure that activated carbon cyclone adsorbing of the invention processes VOC waste gas.
Symbol description：
1 charge pump；2 mixing and absorption devices；3 one-level cyclone adsorbing separators；4 two grades of cyclone adsorbing separators；5 air-introduced machines；6
Flow control valve.
Specific embodiment
As shown in figure 1, the low concentration VOCs gases of discharge are delivered to the bottom air inlet of mixing and absorption device 2 by charge pump 1,
Dispersion is loaded with the modified activated carbon at iron phase nano active center as adsorbent, and mixing and absorption is entered through the control of flow control valve 6
Its top feed of device 2 mouthful, it is 1 that period flow control valve 6 controls VOCs gases and modified activated carbon mixed proportion：5, two strands of materials exist
Under gravity and buoyancy, the mixing in mixing and absorption device 2 completes the preliminary absorption of VOCs.Mixed gas-solid material is through pipe
Line is delivered to the rectangle charging aperture of one-level cyclone adsorbing separator 3, in the case where three-dimensional rotation flow field acts on, produces activated carbon granule
Rotation, it is ensured that activated carbon surface remains adsorption activity, to VOCs produce efficient absorption effect, once adsorb after gas from
The overfall outflow of one-level cyclone adsorbing separator 3, into two grades of rectangle charging apertures of cyclone adsorbing separator 4, realizes secondary
Higher precision adsorbing separation, wherein adsorbent come from mixing and absorption device 2, are inhaled from one-level eddy flow through the purification gas after adsorbing separation
Attached separator 3 and two grades of overfalls of cyclone adsorbing separator 4 are delivered to outer comb net, the work rich in VOCs through air-introduced machine 5
Property charcoal from cyclone adsorbing separator bottom flow out, be incorporated to after-treatment system.
The structure of cyclone adsorbing separator in the present invention, reference can be made to entitled, " a kind of high performance vulcanization hydrogen absorbs dress
Put ", the applying date is September in 2016 21, and application number is 201610494578.6 invention.
In the first aspect of the present invention, there is provided a kind of activated carbon cyclone adsorbing processes the method for VOC waste gas, the method bag
Include：
Under Flux Valve Control, the modified activated carbon for being loaded with iron phase nano active center will be disperseed to be conveyed through mashing pump
To mixing and absorption device, the VOCs in preliminary absorption waste gas in mixing and absorption device；Material delivers to one-level cyclone adsorbing point after mixing
From device, in the case where three-dimensional rotation flow field acts on, activated carbon granule is set to produce rotation, it is ensured that activated carbon surface remains that absorption is lived
Property, efficient absorption effect is produced to VOCs；Gas delivers to two grades of cyclone adsorbing separators after once adsorbing, and realizes secondary more high-precision
Degree adsorbing separation；Gas is incorporated to outer discharge pipe after purification, and outer comb net is delivered to through air-introduced machine.Activated carbon rich in VOCs is from rotation
The outflow of stream adsorbing separation device bottom, is incorporated to after-treatment system.
In the present invention, described modified activated carbon disperses loading iron phase nano active center in carbon-based supports, builds
Basic surface functional groups (such as methoxyl group, phenolic hydroxyl group, pyrroles), form carbon-based absorption/catalysis material, can increase unit adsorption material
Expect the VOC adsorption capacities of volume.
In the present invention, described carbon-based absorption/catalysis material needs the shape of precise control Fe presomas in preparation process
State and decentralization, so as to realize the regulation and control of Fe nano-particle yardsticks.
In the present invention, described mixing and absorption device sets many, can connect in parallel or series, to ensure that subsequent purification is filled
The continuous and steady operation put.
In the present invention, described cyclone adsorbing system entry VOC concentration is in 0~3000mg/m3。
In the second aspect of the present invention, there is provided a kind of equipment of activated carbon cyclone adsorbing VOC waste gas, the equipment includes：
I grade of cyclone adsorbing separator, for carrying out once high accuracy VOC absorption and gas solid separation；
II grade of cyclone adsorbing separator, for carrying out a higher precision VOC absorption and gas solid separation；
The mixing and absorption device being connected with cyclone adsorbing separator, for realize VOCs waste gas and modified activated carbon mixing and
Preliminary absorption；
Charge pump and air-introduced machine, for providing material conveying；
Flow control valve, for adjusting mass flow.
In the present invention, described cyclone adsorbing separator plural serial stage, VOC adsorption efficiencies are up to more than 98%, pollutant
Discharge is better than national newest standards.
In the present invention, the solid particle separative efficiency of described cyclone adsorbing separator is up to more than 99%.
In the present invention, described mixing and absorption device is provided with two feed pipes in top and bottom, and side is provided with discharging opening.
In the present invention, at described flow control valve series hybrid absorber import, for control material mixed proportion.
The advantage of the inventive method and equipment is：
Activated carbon is pre-mixed with VOCs waste gas, realizes preliminary absorption VOCs waste gas, effectively raises the absorption of VOCs
Effect.From the modified activated carbon for disperseing to be loaded with iron phase nano active center as adsorbent, can increase substantially VOCs's
Capacity rate and adsorption rate.Using Multi-stage spiral adsorbers serial or parallel connection, higher precision VOCs absorption and gas solid separation are realized, it is ensured that
The rate of recovery of activated carbon is up to more than 99%.Replace conventional fluidization bed and fixed bed from cyclone adsorbing bed, realize that activated carbon is fast
Speed absorption VOCs, by flow field three-dimensional rotation, it is ensured that VOCs concentration differences remain high-order.The equipment is easy of integration, and diameter is small,
Reduce total floor space and the gross investment of device.
Above said content is only the basic explanation under present inventive concept, and according to appointing that technical scheme is made
What equivalent transformation, all should belong to protection scope of the present invention.
With reference to embodiment, the present invention is further described, and embodiment does not limit the scope of the invention.
Case study on implementation one：
Certain coating factory produces low concentration VOCs waste gas, using modified AC-1 as adsorbent, the cyclone adsorbing under 20 ° of normal temperature
Separating experiment.Concrete operations parameter is：VOCs exhaust-gas treatments amount is 4000m3/ h, the inlet concentration of adsorbate is 821mg/m3, it is living
Property charcoal treating capacity be 9659g/h, in order to control a certain proportion of gas-solid treating capacity, realized with flow control valve in experimental provision
Control.Device is made up of mixing and absorption device, cyclone adsorbing system and power transporting equipment.Wherein, the operation pressure of cyclone adsorbing device
Power is 2.2Mpa, and the setting of mixing and absorption device runs at ambient pressure.Flow field state maintains stabilization after start, it is believed that reach flat
Weighing apparatus state, VOCs concentration is reduced to 8.21mg/m after cyclone adsorbing is separated after measured3, up to 99%, be modified adsorption rate AC-1 activated carbons
Adsorption capacity is 450mg/g, and the rate of recovery of final activated carbon is up to 99.9%.
Case study on implementation two：
Certain coating factory produces low concentration VOCs waste gas, using common AC-1 as adsorbent, the cyclone adsorbing under 20 ° of normal temperature
Separating experiment.Concrete operations parameter is：VOCs exhaust-gas treatments amount is 3500m3/ h, the inlet concentration of adsorbate is 821mg/m3, it is living
Property charcoal treating capacity be 8451g/h, in order to control a certain proportion of gas-solid treating capacity, realized with flow control valve in experimental provision
Control.Device is made up of mixing and absorption device, cyclone adsorbing system and power transporting equipment.Wherein, the operation pressure of cyclone adsorbing device
Power is 2.2Mpa, and the setting of mixing and absorption device runs at ambient pressure.Flow field state maintains stabilization after start, it is believed that reach flat
Weighing apparatus state, VOCs concentration is reduced to 16.42mg/m after cyclone adsorbing is separated after measured3, up to 98.1%, be modified adsorption rate AC-1 activity
Charcoal adsorption capacity is 240mg/g, and the rate of recovery of final activated carbon is up to 99.9%.
The explanation of above example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that right
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these are improved and modification is also fallen into the protection domain of the claims in the present invention.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The scope most wide for causing.
Claims (9)
1. a kind of method that activated carbon cyclone adsorbing processes VOC waste gas, the method includes：
Under Flux Valve Control, the modified activated carbon for being loaded with iron phase nano active center will be disperseed to be delivered to through charge pump mixed
Absorber is closed, the VOCs in preliminary absorption waste gas in mixing and absorption device；Material delivers to one-level cyclone adsorbing separator after mixing,
In the case where three-dimensional rotation flow field acts on, activated carbon granule is set to produce rotation, it is ensured that activated carbon surface remains adsorption activity, right
VOCs produces efficient absorption effect；Gas delivers to two grades of cyclone adsorbing separators after once adsorbing, and realizes that secondary higher precision is inhaled
Fufen from；Gas is incorporated to outer discharge pipe after purification, and outer comb net is delivered to through air-introduced machine.Activated carbon rich in VOCs is inhaled from eddy flow
Attached separator bottom outflow, is incorporated to after-treatment system.
2. method as claimed in claim 1, it is characterised in that described modified activated carbon disperses to load iron phase in carbon-based supports
Nano active center, builds basic surface functional groups, forms carbon-based absorption/catalysis material, increases unit sorbing material volume
VOC adsorption capacities.
3. method as claimed in claim 1, it is characterised in that described basic surface functional groups are methoxyl group, phenolic hydroxyl group or pyrrole
Cough up.
4. the method for claim 1, it is characterised in that described mixing and absorption device sets many, can be in parallel or series
Connection.
5. the method for claim 1, it is characterised in that described cyclone adsorbing system entry VOC concentration is less than
3000mg/m3。
6. a kind of equipment that activated carbon cyclone adsorbing processes VOC waste gas, the equipment includes：
I grade of cyclone adsorbing separator (3), for carrying out once high accuracy VOC absorption and gas solid separation；II grade of cyclone adsorbing is separated
Device (4), for carrying out a higher precision VOC absorption and gas solid separation；
The mixing and absorption device (2) being connected with cyclone adsorbing separator, for realize VOCs waste gas and modified activated carbon mixing and
Preliminary absorption；Charge pump (1) and air-introduced machine (5), for providing material conveying；Flow control valve (6), for instrumentality stream
Amount.
7. equipment as claimed in claim 6, it is characterised in that described cyclone adsorbing separator plural serial stage.
8. equipment as claimed in claim 6, it is characterised in that described mixing and absorption device top and bottom are provided with two chargings
Pipe, side is provided with discharging opening.
9. equipment as claimed in claim 6, it is characterised in that at described flow control valve series hybrid absorber import,
For control material mixed proportion.
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Cited By (6)
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| CN108982280A (en) * | 2018-07-26 | 2018-12-11 | 山东大学 | A kind of coke breeze demercuration method of evaluating performance and system based on air flow bed |
| CN108982281A (en) * | 2018-07-26 | 2018-12-11 | 山东大学 | A kind of coke breeze absorption VOCs method of evaluating performance and system based on air flow bed |
| CN108982279A (en) * | 2018-07-26 | 2018-12-11 | 山东大学 | A kind of coke breeze trace organic substance absorption property evaluation method and system based on air flow bed |
| CN109589746A (en) * | 2018-10-22 | 2019-04-09 | 南京大学环境规划设计研究院股份公司 | Porous media material administers toxic gas device |
| CN109925843A (en) * | 2019-04-12 | 2019-06-25 | 清华大学 | A kind of method of the adsorptive gaseous component of gas-solid multi-stage countercurrent |
| US11918950B2 (en) | 2018-03-02 | 2024-03-05 | Nanjing Tech University | Deep-condensation VOCs recovery system using air as refrigerant |
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| US11918950B2 (en) | 2018-03-02 | 2024-03-05 | Nanjing Tech University | Deep-condensation VOCs recovery system using air as refrigerant |
| CN108982280A (en) * | 2018-07-26 | 2018-12-11 | 山东大学 | A kind of coke breeze demercuration method of evaluating performance and system based on air flow bed |
| CN108982281A (en) * | 2018-07-26 | 2018-12-11 | 山东大学 | A kind of coke breeze absorption VOCs method of evaluating performance and system based on air flow bed |
| CN108982279A (en) * | 2018-07-26 | 2018-12-11 | 山东大学 | A kind of coke breeze trace organic substance absorption property evaluation method and system based on air flow bed |
| CN108982280B (en) * | 2018-07-26 | 2020-06-19 | 山东大学 | Pulverized coke demercuration performance evaluation method and system based on entrained flow bed |
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| CN109589746A (en) * | 2018-10-22 | 2019-04-09 | 南京大学环境规划设计研究院股份公司 | Porous media material administers toxic gas device |
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| CN109925843A (en) * | 2019-04-12 | 2019-06-25 | 清华大学 | A kind of method of the adsorptive gaseous component of gas-solid multi-stage countercurrent |
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