CN106824146A - The method that dielectric barrier discharge activation persulfate cooperates with regenerated carbon - Google Patents
The method that dielectric barrier discharge activation persulfate cooperates with regenerated carbon Download PDFInfo
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- CN106824146A CN106824146A CN201710010559.6A CN201710010559A CN106824146A CN 106824146 A CN106824146 A CN 106824146A CN 201710010559 A CN201710010559 A CN 201710010559A CN 106824146 A CN106824146 A CN 106824146A
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- activated carbon
- persulfate
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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Abstract
A kind of method that dielectric barrier discharge activation persulfate cooperates with regenerated carbon, it is mainly the method for cooperateing with regenerated carbon using discharge plasma activation persulfate, the living radical that the potentiometric titrations and discharge plasma itself for being produced using plasma discharging activation persulfate simultaneously are produced, regeneration of the cooperative achievement to adsorption saturation organic matter activated carbon.With persulfate oxidation technology be combined dielectric barrier discharge plasma oxidation in emerging high-level oxidation technology by the present invention, using its synergy, the adsorbent such as highly efficient regeneration activated carbon, molecular sieve, the method regeneration efficiency is high, recovery time is short, and secondary pollution is low, and activated carbon loss is few.
Description
Technical field
The present invention relates to the renovation process of environmental technology field, particularly waste active carbon.
Background technology
Activated carbon has extremely flourishing internal pore structure and larger specific surface area, high adsorption capacity, and its source
Relative to be easy to get, relative inexpensiveness is a kind of one of the most frequently used adsorbent, is widely used in field of environment protection, for giving up
The adsorption treatment of water and waste gas.But as the range of application of activated carbon is increasingly extensive, consumption also increases sharply, in application process
The waste active carbon amount of generation is more, if not reclaiming activation and recycling, a kind of waste can be not only caused to resource, while can also be right
Environment causes secondary pollution.Therefore, either from from the point of view of economic still environmental protection, the regeneration for promoting activated carbon all has very much
It is necessary.
Traditional regeneration method of active carbon mainly has hot recycling, chemical regeneration and bio-regeneration method.Hot recycling method operation temperature
Degree is high, and generally more than 800 DEG C, energy consumption is very big, while activated carbon loss reaches 5%-15% in regenerative process.Chemical method reaction compared with
It is rapid, stabilised efficiency, but chemical levels are big, and the bigger intermediate product of toxicity is easily produced in regenerative process, may
Cause secondary pollution.Bioanalysis investment, operating cost are low, but debugging difficulty is big, and time-consuming for regenerative process, by water quality and temperature
Influence is big.
In recent years, a collection of emerging renovation process, such as method of discharge plasma regenerated carbon are occurred in that
(CN101530784A, CN1899685A), its be using discharge plasma produce many Strong oxdiative active material such as ozone,
Hydroxyl radical free radical and active oxygen radical etc., the organic pollution adsorbed on oxidation Decomposition activated carbon, then realize activated carbon
Regeneration.But due to activated carbon filling thickness of bed layer limitation in regenerative process, the active material for producing that discharges is difficult to go deep into activated carbon
Inside filling bed, its regeneration effect is influenceed.
Persulfate is a kind of strong oxidizer, the relatively strong (E of the standard oxidationreduction potential of itself0=2.01V), close to
Ozone (E0=2.07V) multiple pollutant can be aoxidized.It is in heat, ultraviolet light, ultrasonic wave, alkali lye and various transition metal ions
Deng materialization effect under, potentiometric titrations (SO can also be converted into4 ·), its oxidisability is better than persulfate and hydroxyl
Free radical, can oxidative degradation organic pollution extensively.Documents (CN103240067A, 105329976A) have applied it to work
Property charcoal regenerated, but this method needs additional heat to activate persulfate, and regenerated carbon efficiency also has room for promotion.
Additionally, documents (CN105174360A) have pointed out one kind to activate persulfate using discharge plasma to enter
A kind of method of row wastewater treatment, it was demonstrated that discharge plasma can be controlled as method for activating persulfate for environmental pollution
Reason.
The content of the invention
It is an object of the invention to provide a kind of regeneration efficiency it is high, the recovery time is short, secondary pollution is few, activated carbon loss is few
Dielectric barrier discharge activation persulfate cooperate with regenerated carbon method.
The method of the present invention is mainly the method for cooperateing with regenerated carbon using discharge plasma activation persulfate, i.e.,
The work that the potentiometric titrations and discharge plasma itself for being produced using plasma discharging activation persulfate simultaneously are produced
Free love base, regeneration of the cooperative achievement to adsorption saturation organic matter activated carbon.
Technical scheme is comprised the following steps that：
The first step, adsorption saturation graininess or powdered active carbon are loaded on the activated carbon of dielectric barrier discharge reactor
In packed bed；
Second step, during the solution containing persulfate added into activated carbon packed bed, the quality of activated carbon and persulfate
It is 50 than scope：1 to 10：1, persulfate concentration range 10g/L to 50g/L, the persulfate are water-soluble persulfuric acid
Sodium, potassium peroxydisulfate or ammonium persulfate；
3rd step, air or oxygen are passed through in packed bed by reactor passage, and its tolerance scope is 1L/min
To 3L/min；
4th step, opens the high voltage power supply of discharge reactor, and regulation high pressure has now produced discharge plasma to 7kV,
The regeneration treatment of the above method is carried out to waste active carbon；
5th step, after discharge process 30 to 120min, treats that persulfate is fully anti-with discharge plasma and waste active carbon
Should, high voltage power supply is closed, the activated carbon after regeneration is taken out from activated carbon packed bed.
The course of work of the invention approximately as：Adsorption saturation waste active carbon is filled in dielectric barrier discharge plasma
In the packed bed of reactor, then persulfate is added into packed bed, be fully contacted with waste active carbon therein, using electrion
The physical effect of generation is such as：Persulfate in the physical effects such as highfield, shock wave, ultraviolet light and heat activation packed bed, it is raw
Into the potentiometric titrations of strong oxidizing property, while the Strong oxdiative the active material such as ozone, hydroxyl that are produced using discharge plasma
Free radical and active oxygen radical etc., the strong oxidizing property active material that two ways is produced is common and stepless action is in useless activity
Charcoal, produces synergy, the organic pollution of its absorption of degrading, and realizes the regeneration of waste active carbon.
The present invention has the following advantages that compared with prior art：By dielectric barrier discharge in emerging high-level oxidation technology etc.
Gas ions oxidation is combined with persulfate oxidation technology, using its synergy, the absorption such as highly efficient regeneration activated carbon, molecular sieve
Agent, the method regeneration efficiency is high, and the recovery time is short, and secondary pollution is low, and activated carbon loss is few.
Brief description of the drawings
Fig. 1 is the schematic diagram that dielectric barrier discharge activation persulfate cooperates with method for regenerating activated carbon.
Fig. 2 is the oxidation of 10g/L sodium peroxydisulfates, independent discharge process and discharge plasma activation persulfate collaboration regeneration
Activated carbon effect contrast figure.
In figure：1 air pump；2 spinner flowmeters；3 glass mediums；4 high-field electrodes；5 low-field electrodes；6 activated carbon reactors
Packed bed；7 AC powers.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.
In the simplified schematic diagram of dielectric barrier discharge reactor shown in Fig. 1, the dielectric barrier discharge system that this example is used
It is double medium barrier discharge forms, using the simple glass 3 of 200mm × 200mm × 3mm as discharge medium, high-tension electricity
Pole 4 is the stainless steel plate of 150mm × 150mm × 2mm with low-field electrode 5, and its high-field electrode is connected with AC power, its low pressure
Electrode is grounded.Activated carbon packed bed 6 is plastic material, is block form, is used for loading activated carbon in the middle of it, and its housing size is
150mm×150mm×8mm；Activated carbon packed bed is fixed on low-field electrode；Activated carbon used is column coal mass active carbon, directly
Footpath 3-5mm, average length 5-10mm；Breather pipe and the STH of reactor activity charcoal packed bed one that air pump 1 passes through diameter 5mm
It is connected, spinner flowmeter 2 is provided between reactor activity charcoal packed bed and air pump.In packed bed entrance to opening together hole
Used as gas vent, the gas vent is connected with conduit discharges gas to footpath aperture.
Example 1
The waste active carbon of adsorption saturation phenolic waste water is taken by air-drying, moisture content is about 20%, its quality is 5.0g, filling
In the activated carbon packed bed of dielectric barrier discharge reactor, whole bed is filled up.The sodium peroxydisulfate solution 10mL of 50g/L is equal
Even addition is had been filled with the packed bed of waste active carbon, and now activated carbon is about 10 with the mass ratio of sodium peroxydisulfate：1.By air pump
Air is passed through as discharge reactor source of the gas, spinner flowmeter is adjusted, holding ventilation flow rate is 3L/min.Open high-frequency alternating current
Source, frequency is fixed as 7kHz, voltage Tiao Jiedao 7kV, discharge process 120min.Power supply is closed, is taken out from activated carbon packed bed
Activated carbon.
Activated carbon after regeneration is carried out into adsorption experiment again, its adsorption effect is determined, regeneration efficiency is calculated.Result discovery,
It is 8.7% to be individually added into persulfate and do not carry out the regenerating active carbon rate of discharge process, and independent discharge process is added without persulfuric acid
The regenerating active carbon rate of salt is 67.5%, and the regeneration rate of discharge activation persulfate regenerated carbon has reached 81.7%, such as
Shown in Fig. 2, synergy is obvious.
Example 2
The waste active carbon of adsorption saturation phenolic waste water is taken by air-drying, moisture content is about 20%, its quality is 5.0g, filling
In the activated carbon packed bed of dielectric barrier discharge reactor, whole bed is filled up.The potassium persulfate solution 10mL of 10g/L is equal
Even addition is had been filled with the packed bed of waste active carbon, and now activated carbon is about 50 with the mass ratio of potassium persulfate solution：1.Pass through
Air pump is passed through air as discharge reactor source of the gas, adjusts spinner flowmeter, and holding ventilation flow rate is 1L/min.High frequency is opened to hand over
Stream power supply, frequency is fixed as 7kHz, voltage Tiao Jiedao 7kV, discharge process 120min.Power supply is closed, from activated carbon packed bed
Take out activity.Activated carbon after regeneration is carried out into adsorption experiment again, its adsorption effect is determined, its regeneration rate has reached 75.2%,
Now independent discharge effect is only 66.8%.
Example 3
The waste active carbon of adsorption saturation phenolic waste water is taken by air-drying, moisture content is about 20%, its quality is 5.0g, filling
In the activated carbon packed bed of dielectric barrier discharge reactor, whole bed is filled up.The ammonium persulfate solution 10mL of 25g/L is equal
Even addition is had been filled with the packed bed of waste active carbon, and now activated carbon is about 20 with the mass ratio of ammonium persulfate：1.By air pump
Air is passed through as discharge reactor source of the gas, spinner flowmeter is adjusted, holding ventilation flow rate is 1.5L/min.Open high-frequency ac
Power supply, frequency is fixed as 7kHz, voltage Tiao Jiedao 7kV, discharge process 60min.Power supply is closed, is taken out from activated carbon packed bed
Activated carbon.Activated carbon after regeneration is carried out into adsorption experiment again, its adsorption effect is determined, its regeneration rate has reached 80.3%, this
When independent discharge effect be only 69.8%.
Claims (1)
1. a kind of method that dielectric barrier discharge activation persulfate cooperates with regenerated carbon, it is characterised in that：Specific steps are such as
Under：
The first step, adsorption saturation graininess or powdered active carbon are loaded on the activated carbon filling of dielectric barrier discharge reactor
In bed；
Second step, by the solution addition activated carbon packed bed containing persulfate, activated carbon compares model with the quality of persulfate
Enclose is 50：1 to 10：1, persulfate concentration range 10g/L to 50g/L；
3rd step, air or oxygen are passed through in packed bed by reactor passage, and its tolerance scope is 1L/min to 3L/
min；
4th step, opens the high voltage power supply of discharge reactor, and regulation high pressure has now produced discharge plasma to 7kV, to useless
Activated carbon carries out the regeneration treatment of the above method；
5th step, after discharge process 30 to 120min, treats that persulfate fully reacts with discharge plasma and waste active carbon, closes
High voltage power supply is closed, the activated carbon after regeneration is taken out from activated carbon packed bed.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786771A (en) * | 2018-05-28 | 2018-11-13 | 深圳市前海泓远控股有限公司 | It is a kind of using hydrogen peroxide as the plasma active carbon regeneration method of secondary excitation object |
| CN113713763A (en) * | 2021-08-11 | 2021-11-30 | 河海大学 | Activated carbon regeneration method based on ultraviolet activated peroxymonosulfate |
| WO2021258684A1 (en) * | 2020-06-24 | 2021-12-30 | 东南大学 | Low-temperature plasma regeneration system and method for inactivated activated carbon |
| CN116984033A (en) * | 2023-06-25 | 2023-11-03 | 北京予知环保科技有限公司 | Regeneration method and regeneration solution of deactivated manganese-based catalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101530784A (en) * | 2009-04-09 | 2009-09-16 | 大连理工大学 | Method and device for regenerating irradiation active carbons of dielectric barrier discharge plasma |
| CN103203227A (en) * | 2013-04-12 | 2013-07-17 | 复旦大学 | Method for absorbing saturated active carbon by in situ regeneration of peroxysulphate |
| CN103252223A (en) * | 2013-05-15 | 2013-08-21 | 东华大学 | Method for regenerating saturated active carbon adsorbing organic matters through microwave activation of potassium persulfate |
| CN104549563A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Regeneration method of catalyst for synthesizing isopropylbenzene |
| CN105174360A (en) * | 2015-09-25 | 2015-12-23 | 大连理工大学 | Method for adopting discharge plasma to activate persulfate |
-
2017
- 2017-01-06 CN CN201710010559.6A patent/CN106824146A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101530784A (en) * | 2009-04-09 | 2009-09-16 | 大连理工大学 | Method and device for regenerating irradiation active carbons of dielectric barrier discharge plasma |
| CN103203227A (en) * | 2013-04-12 | 2013-07-17 | 复旦大学 | Method for absorbing saturated active carbon by in situ regeneration of peroxysulphate |
| CN103252223A (en) * | 2013-05-15 | 2013-08-21 | 东华大学 | Method for regenerating saturated active carbon adsorbing organic matters through microwave activation of potassium persulfate |
| CN104549563A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Regeneration method of catalyst for synthesizing isopropylbenzene |
| CN105174360A (en) * | 2015-09-25 | 2015-12-23 | 大连理工大学 | Method for adopting discharge plasma to activate persulfate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786771A (en) * | 2018-05-28 | 2018-11-13 | 深圳市前海泓远控股有限公司 | It is a kind of using hydrogen peroxide as the plasma active carbon regeneration method of secondary excitation object |
| WO2021258684A1 (en) * | 2020-06-24 | 2021-12-30 | 东南大学 | Low-temperature plasma regeneration system and method for inactivated activated carbon |
| CN113713763A (en) * | 2021-08-11 | 2021-11-30 | 河海大学 | Activated carbon regeneration method based on ultraviolet activated peroxymonosulfate |
| CN116984033A (en) * | 2023-06-25 | 2023-11-03 | 北京予知环保科技有限公司 | Regeneration method and regeneration solution of deactivated manganese-based catalyst |
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Application publication date: 20170613 |