CN108786383A - A kind of VOCs absorbents and its application - Google Patents
A kind of VOCs absorbents and its application Download PDFInfo
- Publication number
- CN108786383A CN108786383A CN201810674766.6A CN201810674766A CN108786383A CN 108786383 A CN108786383 A CN 108786383A CN 201810674766 A CN201810674766 A CN 201810674766A CN 108786383 A CN108786383 A CN 108786383A
- Authority
- CN
- China
- Prior art keywords
- vocs
- absorption
- absorbents
- liquid
- absorbent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/30—Ionic liquids and zwitter-ions
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention is a kind of VOCs absorbents and its application.The absorbent is using ionic liquid as polarity phase, it is acted on by nonionic surfactant and cosurfactant, a small amount of ionic liquid is dispersed in the form of dispersed phase in a large amount of water or biodiesel and obtains microemulsion, the microemulsion has VOCs very high dissolubility, to solve the recycling of the processing of sewage treatment plant's VOCs uncontrollable discharges and VOCs.
Description
Technical field
The present invention relates to the processing and recycling of sewage treatment plant's VOCs uncontrollable discharges, refer in particular to it is a kind of containing aromatics,
The processing of the mixing organic exhaust gas of the VOCs such as halogenated hydrocarbons and recovery method.
Background technology
Definition about VOCs (volatile organic compounds) is there are many form, such as the U.S.
VOC is defined as any organic compound that can participate in atmospheric photochemical reaction by ASTMD3960-98 standards；Air Pollution Control
Definition in engineering is the general designation that VOCs is a kind of organic compound, their evaporation rate is big at normal temperatures, volatile.VOCs
Including non-methane hydrocarbon (alkane, alkene, alkynes, aromatic hydrocarbon etc.), oxygen-bearing organic matter (aldehyde, ketone, alcohol, ether etc.), chlorinated organics,
Itrogenous organic substance, sulfurous organic compound etc. are to form ozone (O3) and fine particle (PM2.5) pollution important as precursors object." 13
Five " volatile organic matter prevention and cure of pollution programmes of work, which have been issued, need to strengthen the stenches class such as styrene, methyl mercaptan, methyl sulfide VOCs's
Emission control.Contain high density pollution object in a large amount of waste water that petroleum chemical enterprise's production generates, most of volatile organic matter passes through
The surface that waste water is contacted with air is discharged into air in a manner of uncontrollable discharge, these organic solvents are evaporate into air, not only can
Environment is polluted, can be also detrimental to health.If benzene is a kind of common solvent, it can be less readily available for absorption by the skin or by people
Body sucks, and causes acute and chronic poisoning, but most of poisonings be all due in sucking human body and caused by.Benzene-like compounds
The nervous centralis that people can be damaged, causes nervous system disorders, entail dangers to blood and blood forming organ after the human body that is ingested, when serious
There are bleeding or infection septicemia, when being polluted by styrene liquid such as eye, can cause to burn, have stimulation to respiratory tract,
Long Term Contact causes obstructive lung lesion, pachylosis to chap and thicken sometimes, the international cancer of the World Health Organization in 1996
Disease research group draws a conclusion after studying styrene, it is believed that styrene has carcinogenesis；Halogenated hydrocarbon substance can cause
God declines the lesions such as syndrome and decrease of platelet, liver function decline, hepatosplenomegaly, it is also possible to lead to cancer.
The method of processing VOCs mainly has chemical oxidization method, active carbon adsorption, burning method, biological deodorization method, absorption process
Deng.Chemical oxidization method mostly uses strong oxidizer, such as ozone, permanganate, hypochlorite, chlorine, chlorine dioxide, hydrogen peroxide
Deng odorant is transformed into odorless or weak sordes matter.When pollutant concentration is very high in the exhaust gas that sewage treatment plant generates, oxygen
Changing reaction can be incomplete, and pollutant process is not thorough.Chemical oxidization method high energy consumption, and generate secondary pollution.Active carbon adsorption
The volatile organic matter for generating stench is sucked activated carbon capillary by the main suction-operated for utilizing activated carbon.Wherein acetaldehyde, indoles
Etc. can be removed by physical absorption, hydrogen sulfide, mercaptan etc. pass through the further Adsorption of oxidation reaction in activated carbon surface.It is living
Property carbon adsorption deodorization efficiency it is high, be suitable for processing hydrogen sulfide and mercaptan, but activated carbon need to be regularly replaced, operating cost is high.Combustion
Burning method has direct combustion method and catalyst combustion method, is suitable for the sewage plant that odor concentration is high, tolerance is moderate, but due to operating cost
It is too high, using less in Practical Project.Biological oxidation technology deodorising process be difficult control, influenced by temperature and humidity it is big,
Biological bacteria culture needs the long period, and recovery time is longer after being destroyed.Absorption process has strong applicability, removal rate height etc. excellent
Point, but at present since absorbent needs to be replaced frequently, so industrially application is not very extensive to absorption process, therefore find choosing
Selecting property is strong, and the absorbent of non-secondary pollution has been increasingly subject to the attention of people.
Ionic liquid is as a kind of green solvent, and due to being composed entirely of ions, ionic liquid has better than conventional
The property of organic solvent, such as thermal stability are good, and toxicity is low, and dissolubility is strong, and volatility is small, and easily recycling etc., are a kind of reasons
The absorbent thought.Currently, the research for removing VOCs to ionic liquid focuses more on the volatilization of ionic liquid and liquid form
Property organic matter (VOCs) dissolution equilibrium research.It has been investigated that the VOCs such as benzene, propylene, propane, dimethylbenzene are in ionic liquid
There is very high solubility, but due to ionic liquid large viscosity itself, is unfavorable for gas absorption, therefore in actual absorption process
In, ideal effect is not achieved in processing VOCs.And ionic liquid is expensive compared to other VOCs absorbents, is not easy to a large amount of
It uses.
Invention content
The purpose of the present invention be for insufficient present in current techniques, provide a kind of VOCs absorbents and aromatics,
The processing of the mixing organic exhaust gas of the VOCs such as halogenated hydrocarbons and recovery method.The VOCs absorbents of the present invention, using ionic liquid as pole
Property phase, acted on by nonionic surfactant and cosurfactant, a small amount of ionic liquid is uniform in the form of dispersed phase
It is dispersed in a large amount of water or biodiesel and obtains microemulsion, which has VOCs very high dissolubility, to solve dirt
The processing of water treatment plant's VOCs uncontrollable discharges and the recycling of VOCs.
The technical scheme is that：
A kind of VOCs absorbents, the absorbent are following two compositions,
Wherein, one is formed, composition is as follows with mass fraction：
The cation of the hydrophilic ionic-liquid is imidazoles, pyridines, quaternary amines, quaternary phosphonium class；Anion is
BF4 -、Cl-、OTF-；
Alternatively, composition two, composition is as follows with mass fraction：
The cation of the hydrophobic ionic liquid is imidazoles, pyridines, quaternary amines, quaternary phosphonium class；Anion isOTF-、NNfTf-；
The nonionic surfactant is polysorbate (Tween) or Triton X-100；
The cosurfactant is ethyl alcohol, normal propyl alcohol, isopropanol, n-butanol, isobutanol, n-amyl alcohol, isoamyl alcohol, 1-
Hexanol, 2- hexanols, 1- octanols, sec-n-octyl alcohol, fusel oil or n nonylphenol.
The hydrophilic ionic-liquid is specially [BMIM] [BF4] (- 3 methyl tetrafluoroborate of 1- butyl), [DDMIM]
[Cl] (chlorination 1- dodecyl -3- methylimidazoles), [DDMIM] [OTF] (1- dodecyl -3- methyl trifluoro Loprazolams
Salt), [DDMIM] [MeSO3] (1- dodecyl -3- methylmethanesulfonates salt).
The hydrophobic ionic liquid is specially [DDMIM] [NTf2] (the double trifluoro methylsulfonyls of 1- dodecyl -3- methyl
Inferior amine salt), [N4,4,4,4] [NTf2] (tetrabutylammonium bis-trifluoromethylsulfoandimide salt), [P4,4,4,4] [NTf2] (tetrabutyl phosphine
Bis-trifluoromethylsulfoandimide salt), [P4,4,4,4] [PF6] (tetrabutyl phosphine hexafluorophosphate).
The preferred ingredient of the composition one is with mass fraction：
The preferred ingredient of the composition two is with mass fraction：
The application process of the VOCs absorbents, includes the following steps：
Nonionic surfactant, cosurfactant are added into ionic liquid, obtains mixed solution after mixing, is stirring
It mixes and is at the uniform velocity added to water or biodiesel in mixed solution under state, obtain microemulsion；Then machine exhaust gas is blended with to be passed through
In microemulsion, microemulsion keeps 303.15K constant temperature, organic exhaust gas to be discharged, go out by exhaust pipe through 4~15 seconds in microemulsion
Mouth is purified gas, and VOCs contents are less than national standard, can be directly discharged in air；It is absorbed per 100gVOCs
Agent is 0.05~0.2m in charge flow rate3·h-1, inlet gas concentration is 2000~6000mgm-3Under conditions of, absorbent is through 2~8
Hour reaches saturation, and the liquid after absorption isolates absorbent through vacuum distillation, in case recycling；
The present invention substantive distinguishing features be：
VOCs absorbents provided by the present invention, it is characterised in that using hydrophobic ionic liquid as polarity phase, by it is non-from
Under sub- surfactant and cosurfactant effect, a small amount of hydrophobic ionic liquid is dispersed in the form of dispersed phase
In a large amount of water, water packet ionic liquid (IL/W) type microemulsion is obtained.
VOCs absorbents provided by the present invention, it is characterised in that using hydrophilic ionic-liquid substitution water as polarity phase,
Under the action of nonionic surfactant and cosurfactant, by a small amount of hydrophilic ionic-liquid in the form of dispersed phase
It is dispersed in a large amount of biodiesel, obtains oily packet ionic liquid (IL/O) type microemulsion.
The advantages of VOCs absorbents have ionic liquid and microemulsion concurrently in turn.Ionic liquid is mutually dispersed in water or life with polarity
In object diesel oil, " sorption " capacity of one side ionic liquid is more than the continuous phase of same volume, therefore under same renewal frequency,
It is big to the uptake of gas, to improve absorptivity of the microemulsion to VOCs；On the other hand, ionic liquid dispersed phase plus
Enter, increase the disturbance in fluid so that dispersed phase drop cycles through the low liquid phase main body of concentration, constantly updates gas-liquid contact
Interface reduces the solute concentration on liquid level, increases mass transfer force, meanwhile, the addition of ionic liquid dispersed phase so that gas-liquid
Interfacial turbulence aggravates, and reduces mass transfer thickness of liquid film, reduces liquid-film resistance, therefore ion liquid microemulsion is averaged to VOCs
Absorptivity is better than other VOCs absorbents.
Beneficial effects of the present invention are：
Ionic liquid is novel green solvent, has the incomparable advantage of other absorbents, such as wider liquid temperature
Spend range, stronger polarity, to the very strong stability of empty gas and water, broader electrochemical window, vapour pressure is low etc., it is used as gas
Body absorbent can decrease the loss of absorbent to avoid the secondary pollution brought because absorbent volatilizees.Due to ionic liquid
Body itself is expensive, therefore is configured to microemulsion and can effectively reduce cost, while oil phase and water phase are emulsified together and become
Drop has the double properties of oil and water, has preferable dissolubility to oil-soluble and water-soluble VOCs.Wherein by above-mentioned group
Divide the material A formed in any combination, very strong hydrogen bond action can be formed with VOCs, therefore VOCs is in the absorbent
There is higher solubility, and soluble in water by emulsifying；And water or biodiesel can be used for dissolving water-soluble VOCs.By this
VOCs processing of the VOCs absorbents to sewage treatment plant's uncontrollable discharge, can remove effectively the VOCs in air, make outlet
VOCs contents are less than 2% in gas.
In addition, the present invention is passed through gas using concentration, the continuous operation process more absorbed, since sewage treatment plant discharges
VOCs mainly based on the volatilization of volatile organic matter in waste water, the exhaust gas concentration of generation is inhomogenous, if directly being absorbed
The mass-transfer efficiency of process, VOCs and absorbent in exhaust gas is very low, is unfavorable for absorption operation, and concentrates and be passed through gas, is advance
Exhaust gas is concentrated in air accumulator, exhaust gas can be made to be sufficiently mixed in this way, while the best inlet gas concentration of exhaust gas can also be controlled,
Concentration is passed through gas can improve 5% or more compared to absorbent compared with being passed directly into the absorptivity of VOCs.Absorption process operates, due to
It needs replacing, desorb absorbing liquid, processing equipment can be caused to can not work normally in this course, and more absorption operations, that is, pacify
2~4 absorption plants are filled, practical work process is 2~3 absorption plants, remaining absorption plant carries out desorption process, thus may be used
Realize absorption and desorption be carried out at the same time, make absorption process realize not intermittently, continuous operation.And easy to operate, low energy consumption.
This seminar has investigated the influence of the kinetic factors such as inlet gas concentration and intake velocity, obtains and is absorbing temperature
303.15K inlet gas concentration 40000mgm-3, intake velocity 0.1Nm3·h-1Under the conditions of, select [DDMIM] [NTf of 25g2]
(the double trifluorosulfonimide salt of 1- dodecyl -3- methylimidazoles) can reach 96% or more to the initial absorption of toluene.
Description of the drawings
Fig. 1 is continous way of the present invention, more absorption plant structure charts；
Wherein, V1- mixed gas gas holder, C1- mixed gas compressors, the first absorption towers VOCs T1-, the 2nd VOCs of T2-
Absorption tower, the 3rd absorption towers VOCs T3-, P1- lean pumps, P2- rich solution pumps, T4-VOCs desorbers, V2- recycle liquid bath.
Fig. 2 is that the absorptivity of the absorbent in embodiment 1 changes over time curve；
Wherein, ordinate η indicates absorptivity, and abscissa is the time.
Fig. 3 is that the absorptivity of the absorbent in embodiment 2 changes over time curve；
Wherein, ordinate η indicates absorptivity, and abscissa is the time.
Example is embodied
Below by specific implementation example, the present invention is described in detail.
Following example Central Plains exhaust gas is the VOCs, concentration 2000mgm for simulating sewage treatment plant's uncontrollable discharge-3, total to flow
Measure 0.1Nm3·h-1, wherein it is 4 that the group of VOCs, which becomes styrene with dichloroethanes mass ratio,：1, N2For carrier gas.
A kind of VOCs absorption plants of the present invention, as shown in Figure 1, the composition of the device includes mixed gas gas holder
V1, mixed gas compressor C1, the first absorption towers VOCs T1, the 2nd absorption towers VOCs T2, the 3rd absorption towers VOCs T3, lean pump
P1, rich solution pump P2, VOCs desorber T4 and cycle liquid bath V2；Its connection relation is：Mixed gas gas holder V1 and mixed gas pressure
Contracting machine C1 be connected, mixed gas compressor C1 respectively with the first absorption towers VOCs T1, the 2nd absorption towers VOCs T2 and the 3rd VOCs
The lower part of absorption tower T3 is connected；It is connected with the lower part of the 2nd absorption towers VOCs T2 at the top of first absorption towers VOCs T1, the 2nd VOCs
The top of absorption tower T2 is connected with the lower part of the 3rd absorption towers VOCs T3, and top and the first VOCs of the 3rd absorption towers VOCs T3 inhale
The lower part for receiving tower T1 is connected；First absorption towers VOCs T1, the bottom of the 2nd absorption towers VOCs T2 and the 3rd absorption towers VOCs T3 are equal
It is connected with rich solution pump P2, rich solution pump P2 is connected with the lower parts VOCs desorber T4, and the bottoms desorber T4 VOCs are with cycle liquid bath V2's
Top is connected, and the bottom of cycle liquid bath V2 is connected with lean pump P1, lean pump P1 respectively with the first absorption towers VOCs T1, second
The top of the absorption towers VOCs T2 and the 3rd absorption towers VOCs T3 are connected.
Route one：VOCs gases mixed gas gas holder V1 concentrate, by pipeline from the first absorption towers the VOCs lower parts T1 into
Enter, top discharge enters the 2nd absorption towers the VOCs lower parts T2 by the road, and top of tower, which is the exhaust gas after absorbing, can be directly discharged to sky
Gas, the liquid after absorption, from absorb the bottom of the tower, are desorbed, the suction after desorption through rich solution pump P2 into the lower parts VOCs desorber T4
Agent is received, spare from VOCs desorber T4 bottom discharges to cycle liquid bath V2, absorbent enters in cycle liquid bath V2 through lean pump P1
Absorption tower top carries out absorption process；
Route two：VOCs gases mixed gas gas holder V1 concentrate, by pipeline from the 2nd absorption towers the VOCs lower parts T2 into
Enter, top discharge enters the 3rd absorption towers the VOCs lower parts T3 by the road, and top of tower, which is the exhaust gas after absorbing, can be directly discharged to sky
Gas, the liquid after absorption, from absorb the bottom of the tower, are desorbed, the suction after desorption through rich solution pump P2 into the lower parts VOCs desorber T4
Agent is received, spare from VOCs desorber T4 bottom discharges to cycle liquid bath V2, absorbent enters in cycle liquid bath V2 through lean pump P1
Absorption tower top carries out absorption process；
Route three：VOCs gases mixed gas gas holder V1 concentrate, by pipeline from the 3rd absorption towers the VOCs lower parts T3 into
Enter, top discharge enters the first absorption towers the VOCs lower parts T1 by the road, and top of tower, which is the exhaust gas after absorbing, can be directly discharged to sky
Gas, the liquid after absorption, from absorb the bottom of the tower, are desorbed, the suction after desorption through rich solution pump P2 into the lower parts VOCs desorber T4
Agent is received, spare from VOCs desorber T4 bottom discharges to cycle liquid bath V2, absorbent enters in cycle liquid bath V2 through lean pump P1
Absorption tower top carries out absorption process；
Absorption tower (T1, T2, T3) is ordinary-pressure absorption, and absorption temperature is 303.15K, and absorbent dosage is 100g, tower class
Type is bubbling absorption column, tower height 150mm, tower diameter 45mm；Desorber T4 is vacuum distillation, vacuum degree 0.09MPa, temperature
Degree is 323.15K, and type is alembic, a height of 130mm, a diameter of 70mm；Gas inlet speed is 0.05~0.2m3·h-1。
Embodiment 1
A kind of component of water packet ionic liquid (IL/W) type VOCs absorbents is with mass fraction：
Above-mentioned VOCs absorbents are prepared, absorption operation is carried out to former exhaust gas, the specific steps are：
In 5g [DDMIM] [NTf2] in be added 8gTween-80, add 5g n-butanols, after fully shaking up, stirring shape
By 82g water with 3mlmin under state-1Speed be added in above-mentioned solution, obtain microemulsion, by above-mentioned steps prepare three parts it is micro-
Lotion is spare (to prepare three parts of microemulsions, every part is 100g, this example has used three absorption towers, so each absorption tower absorbs
Agent is 100g, data analysis be 200g assimilation effect participate in absorbing because actual absorption is two towers).
The present invention installs 3 absorption plants using more absorption operations, and practical work process is 2 absorption plants, remaining
Absorption plant carries out desorption process, as shown in Figure 1, mixed gas is concentrated in mixed gas gas holder V1, through gas compressor
C1 adjusts best inlet gas concentration and intake velocity, and concentration is passed into the absorption towers VOCs T1, T1 and T2 series connection and absorbs, and T3 is spare, inhales
After receiving a period of time, T2 and T3 series connection carry out absorption process, and the absorbent in the T1 of the absorption towers VOCs is entered by rich solution pump P2
VOCs desorber T4, the absorbing liquid after desorption are stored in cycle liquid bath V2, enter the absorption towers VOCs T1 through lean pump P1, then
T3 and T1 series connection carries out absorption process, and so on, it thus can realize continuous operation.Absorbent with soak time increasing
Long, absorbent properties are gradually reduced.Absorbent declines in the rear stage of absorption process, absorbent properties, has handled VOCs effects not
Discharging standards can be reached, but absorbent is at this time there are no reaching saturation, also certain absorption surplus, when first order absorption
The absorption surplus of absorbent cannot be made full use of, and two level absorbs, and is absorbed using lean solution and rich solution combination, can be reached to absorbent
To making full use of, meanwhile, two level absorption increases residence time of the gas in absorbent, can effectively improve absorbent pair
The treatment effect of VOCs.The present invention is absorbed using two level, first order inlet gas concentration 2000mgm-3, charge flow rate 0.1Nm3·h-1, absorbent holding 303.15K constant temperature, gas residence time 4s；Second level charge flow rate 0.1Nm3·h-1, absorbent holding
303.15K constant temperature, gas residence time 4s.
As shown in Fig. 2, being 303.15K, inlet gas concentration 2000mgm absorbing temperature-3, charge flow rate 0.1Nm3·
h-1Under the conditions of, select 200g (a tower absorbent is 100g, and two level absorbs, and two tower absorbent total amounts the are 200g) absorption
Agent can reach 92% or more to the initial absorption of VOCs, can keep higher absorptivity in preceding 60min, absorb 200min
Absorbent tends to be saturated afterwards.
Embodiment 2
A kind of component of water packet ionic liquid (IL/W) type VOCs absorbents is with mass fraction：
Above-mentioned VOCs absorbents are prepared, absorption operation is carried out to former exhaust gas, the specific steps are：
In 5g [DDMIM] [NTf2] in be added 8gTween-80, add 5g n-butanols, after fully shaking up, stirring shape
By 82g water with 3mlmin under state-1Speed be added in above-mentioned solution, obtain microemulsion；Aromatics, halogenated hydrocarbons etc. will be contained
It is passed through in microemulsion in the organic exhaust gas centralized of mixing of VOCs, microemulsion keeps 303.15K constant temperature, organic exhaust gas to be passed through in microemulsion
It is discharged by exhaust pipe within 4 seconds, outlet is purified gas, which can reach the initial absorption of VOCs
78% or more；The separation of different component may be implemented by controlling temperature and pressure through vacuum distillation in absorbent after absorption.
This example is operated using single-stage absorption.Gas inlet concentration 2000mgm-3, charge flow rate 0.1Nm3·h-1, absorbent holding
303.15K constant temperature, gas residence time 4s.
As shown in figure 3, being 303.15K, inlet gas concentration 2000mgm absorbing temperature-3, charge flow rate 0.1Nm3·
h-1Under the conditions of, the 100g absorbents are selected, 78% or more can be reached to the initial absorption of VOCs, can be kept in preceding 40min
Higher absorptivity, absorbent tends to be saturated after absorbing 130min.
Embodiment 3
A kind of component of water packet ionic liquid (IL/W) type VOCs absorbents is with mass fraction：
Above-mentioned VOCs absorbents are prepared, absorption operation is carried out to former exhaust gas, the specific steps are：
In 6g [BMIM] [PF6] in be added 10gTween-80,6g n-butanols are added, after fully shaking up, in stirring
It is lower by 78g water with 3mlmin-1Speed be added in above-mentioned solution, obtain microemulsion, by above-mentioned steps prepare three parts of micro emulsions
Liquid is spare.
The present invention installs 3 absorption plants using more absorption operations, and practical work process is 2 absorption plants, remaining
Absorption plant carries out desorption process, as shown in Figure 1, mixed gas is concentrated in mixed gas gas holder V1, through gas compressor
C1 adjusts best inlet gas concentration and intake velocity, and concentration is passed into the absorption towers VOCs T1, T1 and T2 series connection and absorbs, and T3 is spare, inhales
After receiving a period of time, T2 and T3 series connection carry out absorption process, and the absorbent in the T1 of the absorption towers VOCs is entered by rich solution pump P2
VOCs desorber T4, the absorbing liquid after desorption are stored in cycle liquid bath V2, enter the absorption towers VOCs T1 through lean pump P1, then
T3 and T1 series connection carries out absorption process, and so on, it thus can realize continuous operation；The present invention is absorbed using two level, and first
Grade inlet gas concentration 2000mgm-3, charge flow rate 0.1Nm3·h-1, absorbent keeps 303.15K constant temperature, and gas residence time is
6s；Second level charge flow rate 0.1Nm3·h-1, absorbent holding 303.15K constant temperature, gas residence time 6s；The absorbent pair
The initial absorption of VOCs can reach 83% or more.
Embodiment 4
It is a kind of oil packet ionic liquid (IL/O) type VOCs absorbents component be with mass fraction：
(explanation：Biodiesel of the present invention is known substance, for oil plant or waste edible oil and alcohol (methanol
Or ethyl alcohol) through aliphatic acid monoalkyl ester made of esterification, most typically fatty acid methyl ester.Biology used in example
Diesel oil main component is methyl oleate.)
Above-mentioned VOCs absorbents are prepared, absorption operation is carried out to former exhaust gas, the specific steps are：
In 5g [BMIM] [BF4] in be added 8gTween-80,5g n-butanols are added, after fully shaking up, in stirring
It is lower by 82g biodiesel with 3mlmin-1Speed be added in above-mentioned solution, obtain microemulsion, by above-mentioned steps prepare three
Part microemulsion is spare.
The present invention installs 3 absorption plants using more absorption operations, and practical work process is 2 absorption plants, remaining
Absorption plant carries out desorption process, as shown in Figure 1, mixed gas is concentrated in mixed gas gas holder V1, through gas compressor
C1 adjusts best inlet gas concentration and intake velocity, and concentration is passed into the absorption towers VOCs T1, T1 and T2 series connection and absorbs, and T3 is spare, inhales
After receiving a period of time, T2 and T3 series connection carry out absorption process, and the absorbent in the T1 of the absorption towers VOCs is entered by rich solution pump P2
VOCs desorber T4, the absorbing liquid after desorption are stored in cycle liquid bath V2, enter the absorption towers VOCs T1 through lean pump P1, then
T3 and T1 series connection carries out absorption process, and so on, it thus can realize continuous operation；The present invention is absorbed using two level, and first
Grade inlet gas concentration 2000mgm-3, charge flow rate 0.1Nm3·h-1, absorbent keeps 303.15K constant temperature, and gas residence time is
6s；Second level charge flow rate 0.1Nm3·h-1, absorbent holding 303.15K constant temperature, gas residence time 6s；The absorbent pair
The initial absorption of VOCs can reach 89% or more.
The present invention evaluates assimilation effect of the absorbent to former exhaust gas using absorptivity.Styrene, two chloroethenes in former exhaust gas
The detection of alkane uses Beijing Rayleigh analytical instrument (group) Co., Ltd SP-3400 type gas chromatographs.Chromatographic column is selected
PEG-3M packed columns, 100 DEG C of column temperature, injector temperature are 160 DEG C, and detector temperature is 150 DEG C, sampling amount 0.5ml.
The main composition of former exhaust gas has been given at specific implementation example beginning.Wherein styrene and dichloroethanes quality
Than being 4：1, N2For carrier gas.
The foregoing is merely the preferred embodiments of the invention, discuss that the purpose of example is that the present invention is better described
Principle and the practicality, be not intended to limit the invention creation, it is all within the spirit and principle of the invention, made by
Any modification, equivalent substitution, improvement and etc. should be included within the protection domain of the invention.
VOCs absorbents provided by the present invention, it is characterised in that using hydrophobic ionic liquid as polarity phase, by it is non-from
Under sub- surfactant and cosurfactant effect, a small amount of hydrophobic ionic liquid is dispersed in the form of dispersed phase
In a large amount of water, water packet ionic liquid (IL/W) type microemulsion is obtained.
VOCs absorbents provided by the present invention, it is characterised in that using hydrophilic ionic-liquid substitution water as polarity phase,
Under the action of nonionic surfactant and cosurfactant, by a small amount of hydrophilic ionic-liquid in the form of dispersed phase
It is dispersed in a large amount of biodiesel, obtains oily packet ionic liquid (IL/O) type microemulsion.
The present invention includes water packet ionic liquid (IL/W) type and oily packet ionic liquid (IL/O) two kinds of microemulsions of type, wherein
Tween is that polysorbate is that polyoxyethylene sorbitan monolaurate and a part of polyoxyethylene pair remove water sorbierite list
The mixture of laurate, due to having more hydrophilic radical in polysorbate molecule -- polyoxyethylene groups, therefore hydrophily is strong,
It is used frequently as oil-in-water (O/W) type emulsifier, Tween is typically considered nontoxic, nonirritant material, net for air
It is harmless in change.Triton X-100, that is, Triton X-100 is nonionic surfactant, usually as poly-
The formula for closing lotion uses, and is a kind of more excellent emulsifier.It lives on the surface that cosurfactant can change surfactant
Property and hydrophile-lipophile balance, participation form micella, the polarity of adjustment water and oil, water-soluble alcohol can reduce the polarity of water, and oil is molten
Property alcohol can increase oil polarity, to influence the phase of system and the micro emulsion ingredient of phase property.
1 ionic liquid of table is water-soluble
Unaccomplished matter of the present invention is known technology.
Claims (4)
1. a kind of VOCs absorbents, it is characterized in that the absorbent is following two compositions,
Wherein, one is formed, composition is as follows with mass fraction：
The cation of the hydrophilic ionic-liquid is imidazoles, pyridines, quaternary amines, quaternary phosphonium class；Anion is
Cl-、OTF-；
Alternatively, composition two, composition is as follows with mass fraction：
The cation of the hydrophobic ionic liquid is imidazoles, pyridines, quaternary amines, quaternary phosphonium class；Anion isOTF-、NNfTf-；
The nonionic surfactant is polysorbate (Tween) or Triton X-100；
The cosurfactant be ethyl alcohol, normal propyl alcohol, isopropanol, n-butanol, isobutanol, n-amyl alcohol, isoamyl alcohol, 1- oneself
Alcohol, 2- hexanols, 1- octanols, sec-n-octyl alcohol, fusel oil or n nonylphenol.
2. VOCs absorbents as described in claim 1, it is characterized in that the hydrophilic ionic-liquid is specially [BMIM]
[BF4] (- 3 methyl tetrafluoroborate of 1- butyl), [DDMIM] [Cl] (chlorination 1- dodecyl -3- methylimidazoles), [DDMIM]
[OTF] (1- dodecyl -3- methyl trifluoros methane sulfonates), [DDMIM] [MeSO3] (1- dodecyl -3- methylmethanesulfonates
Salt)；
The hydrophobic ionic liquid is specially [DDMIM] [NTf2] (1- dodecyl -3- methyl bis-trifluoromethylsulfoandimides
Salt), [N4,4,4,4] [NTf2] (tetrabutylammonium bis-trifluoromethylsulfoandimide salt), [P4,4,4,4] [NTf2] (tetrabutyl phosphine double three
Fluorine sulfonamide), [P4,4,4,4] [PF6] (tetrabutyl phosphine hexafluorophosphate).
3. VOCs absorbents as described in claim 1, it is characterized in that the component of the composition one is with mass fraction：
The preferred ingredient of the composition two is with mass fraction：
4. the application process of VOCs absorbents as described in claim 1, includes the following steps：
Nonionic surfactant, cosurfactant are added into ionic liquid, mixed solution is obtained after mixing, in stirring shape
Water or biodiesel are at the uniform velocity added in mixed solution under state, obtain microemulsion；Then it is blended with machine exhaust gas and is passed through micro emulsion
In liquid, microemulsion keeps 303.15K constant temperature, organic exhaust gas to be discharged by exhaust pipe through 4~15 seconds in microemulsion, and outlet is
For purified gas, and VOCs contents are less than national standard, can be directly discharged in air；Exist per 100gVOCs absorbents
Charge flow rate is 0.05~0.2m3·h-1, inlet gas concentration is 2000~6000mgm-3Under conditions of, absorbent was through 2~8 hours
Reach saturation, the liquid after absorption isolates absorbent through vacuum distillation, in case recycling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810674766.6A CN108786383B (en) | 2018-06-27 | 2018-06-27 | VOCs absorbent and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810674766.6A CN108786383B (en) | 2018-06-27 | 2018-06-27 | VOCs absorbent and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108786383A true CN108786383A (en) | 2018-11-13 |
| CN108786383B CN108786383B (en) | 2021-04-02 |
Family
ID=64072075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810674766.6A Active CN108786383B (en) | 2018-06-27 | 2018-06-27 | VOCs absorbent and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108786383B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110314495A (en) * | 2019-08-06 | 2019-10-11 | 福建省宇洲环保集团有限公司 | A kind of novel VOCs absorbent and preparation method thereof |
| CN112791562A (en) * | 2020-12-24 | 2021-05-14 | 广东环境保护工程职业学院 | System for ionic liquid absorbs and handles VOC with out-of-phase light fenton in coordination |
| CN113786711A (en) * | 2021-09-30 | 2021-12-14 | 郑州中科新兴产业技术研究院 | Method for recovering chlorine-containing volatile organic compounds in organic waste gas by using ionic liquid |
| CN114377518A (en) * | 2020-10-20 | 2022-04-22 | 中国石油天然气股份有限公司 | Reverse microemulsion and preparation method and application thereof |
| CN114797379A (en) * | 2021-05-31 | 2022-07-29 | 上海宜室建筑环境工程有限公司 | Air purifying liquid containing ionic liquid and preparation method and application thereof |
| CN114950073A (en) * | 2021-07-14 | 2022-08-30 | 上海宜室建筑环境工程有限公司 | Ion compound liquid for improving comfort and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0558878A (en) * | 1991-09-06 | 1993-03-09 | Green Cross Corp:The | Fat emulsion |
| CN101259361A (en) * | 2008-03-24 | 2008-09-10 | 昆明理工大学 | Method for using microemulsion to purify organic waste gases |
| WO2009127440A1 (en) * | 2008-04-18 | 2009-10-22 | Institut Für Nachhaltigen Umweltschutz Inu Gbr | Method and device for separating carbon dioxide from stack, sludge, and/or exhaust gases |
| CN101591354A (en) * | 2002-04-05 | 2009-12-02 | 南阿拉巴马大学 | The ionic liquid of functionalization and using method thereof |
| CN101683593A (en) * | 2008-08-15 | 2010-03-31 | 赢创戈尔德施米特有限公司 | Nano-emulsions and method of producing them, and their use |
| CN105582786A (en) * | 2015-12-24 | 2016-05-18 | 北京化工大学 | Method for removing VOCs (volatile organic compounds) in gas through ionic liquid |
-
2018
- 2018-06-27 CN CN201810674766.6A patent/CN108786383B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0558878A (en) * | 1991-09-06 | 1993-03-09 | Green Cross Corp:The | Fat emulsion |
| CN101591354A (en) * | 2002-04-05 | 2009-12-02 | 南阿拉巴马大学 | The ionic liquid of functionalization and using method thereof |
| CN101259361A (en) * | 2008-03-24 | 2008-09-10 | 昆明理工大学 | Method for using microemulsion to purify organic waste gases |
| WO2009127440A1 (en) * | 2008-04-18 | 2009-10-22 | Institut Für Nachhaltigen Umweltschutz Inu Gbr | Method and device for separating carbon dioxide from stack, sludge, and/or exhaust gases |
| CN101683593A (en) * | 2008-08-15 | 2010-03-31 | 赢创戈尔德施米特有限公司 | Nano-emulsions and method of producing them, and their use |
| CN105582786A (en) * | 2015-12-24 | 2016-05-18 | 北京化工大学 | Method for removing VOCs (volatile organic compounds) in gas through ionic liquid |
Non-Patent Citations (1)
| Title |
|---|
| 尚树川等: "离子液体微乳液研究进展", 《山东科学》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110314495A (en) * | 2019-08-06 | 2019-10-11 | 福建省宇洲环保集团有限公司 | A kind of novel VOCs absorbent and preparation method thereof |
| CN110314495B (en) * | 2019-08-06 | 2021-12-28 | 福建省宇洲环保集团有限公司 | Novel VOCs absorbent and preparation method thereof |
| CN114377518A (en) * | 2020-10-20 | 2022-04-22 | 中国石油天然气股份有限公司 | Reverse microemulsion and preparation method and application thereof |
| CN114377518B (en) * | 2020-10-20 | 2023-04-25 | 中国石油天然气股份有限公司 | Inverse microemulsion and preparation method and application thereof |
| CN112791562A (en) * | 2020-12-24 | 2021-05-14 | 广东环境保护工程职业学院 | System for ionic liquid absorbs and handles VOC with out-of-phase light fenton in coordination |
| CN114797379A (en) * | 2021-05-31 | 2022-07-29 | 上海宜室建筑环境工程有限公司 | Air purifying liquid containing ionic liquid and preparation method and application thereof |
| CN114797379B (en) * | 2021-05-31 | 2023-08-29 | 上海宜室建筑环境工程有限公司 | Air purifying liquid containing ionic liquid and preparation method and application thereof |
| CN114950073A (en) * | 2021-07-14 | 2022-08-30 | 上海宜室建筑环境工程有限公司 | Ion compound liquid for improving comfort and preparation method and application thereof |
| CN114950073B (en) * | 2021-07-14 | 2023-10-20 | 上海宜室建筑环境工程有限公司 | Ion compound liquid for improving comfort and preparation method and application thereof |
| CN113786711A (en) * | 2021-09-30 | 2021-12-14 | 郑州中科新兴产业技术研究院 | Method for recovering chlorine-containing volatile organic compounds in organic waste gas by using ionic liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108786383B (en) | 2021-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108786383A (en) | A kind of VOCs absorbents and its application | |
| CN101844025B (en) | Organic waste gas microemulsion absorbent, and preparation method and use thereof | |
| CN108786382A (en) | A kind of absorption process of VOCs | |
| Ozturk et al. | Absorptive removal of volatile organic compounds from flue gas streams | |
| Vuong et al. | Determination of the Henry's constant and the mass transfer rate of VOCs in solvents | |
| CN104524918B (en) | Method and device for recycling VOC in low-concentration VOC-containing mixed gas | |
| WO2013072147A1 (en) | Method and device for the separation of acidic gases from a gas mixture | |
| CN105727693A (en) | Absorbent for removing VOC waste gas and preparation method thereof | |
| CN103252155B (en) | Device for treating organic waste gas with oil-in-water emulsion and method for treating organic waste gas | |
| CN101569826B (en) | Purification method of waste gas with benzene or benzene homolog and purification apparatus thereof | |
| CN107485993A (en) | Harbour oil gas recovery processing system | |
| CN208493746U (en) | A kind of VOCs absorption plant | |
| CN102114382B (en) | Method for separating and recovering fumigation medicine | |
| CN105477979B (en) | One kind separating CO based on salting-out effect application high viscosity absorbent2Method | |
| CN103537171B (en) | A kind of method of emulsion, the device administering organic exhaust gas and the improvement organic exhaust gas for administering organic exhaust gas | |
| CN105642076A (en) | Absorbent for removing non-methane hydrocarbons and preparation method of absorbent | |
| CN115321635B (en) | Interfacial adsorption method for efficiently removing perfluorinated compounds in water body | |
| CN206404563U (en) | Harbour oil gas recovery processing system | |
| CN2810604Y (en) | Apparatus for decontaminating pollution of indoors decoration | |
| CN205832905U (en) | A kind of foam absorbing method processes the device of benzene homologues VOCs in organic exhaust gas | |
| CN108905516A (en) | Handle the micro emulsion absorbing liquid, preparation method and application of " triphen " organic exhaust gas | |
| CN101259361A (en) | Method for using microemulsion to purify organic waste gases | |
| CN111991992B (en) | Organic waste gas absorption liquid and preparation method thereof | |
| CN203329577U (en) | Device for controlling organic waste gas by oil-in-water emulsified liquid | |
| CN107930347A (en) | A kind of plant absorption liquid of phenyl ring class VOCs and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |