CN109550490A - The regeneration method of active carbon - Google Patents
The regeneration method of active carbon Download PDFInfo
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- CN109550490A CN109550490A CN201811469435.5A CN201811469435A CN109550490A CN 109550490 A CN109550490 A CN 109550490A CN 201811469435 A CN201811469435 A CN 201811469435A CN 109550490 A CN109550490 A CN 109550490A
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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
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
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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
Present invention discloses a kind of regeneration methods of active carbon.The regeneration method includes: that the waste active carbon and diluent that will adsorb organic matter are hybridly prepared into suspension；Prepare ferrous salt solution；The ferrous salt solution and hydrogen peroxide are added into the suspension, obtain reaction mixture；In the reaction mixture, the mass ratio of organic matter and hydrogen peroxide is 1:1-2:3, and the mass ratio of ferrous ion and hydrogen peroxide is 1:1-1:3；It is separated by solid-liquid separation, obtains regenerated carbon.Compared with prior art, the beneficial effects of the present invention are: pass through the organic matter adsorbed in Fenton reagent method oxidation removal waste active carbon, regenerated carbon is recyclable to be recycled, and the quality of the organic matter according to waste active carbon absorption, the quality of hydrogen peroxide and ferrous ion is configured, organic removal rate height is made, the reclamation rate of active carbon is high, the active carbon proportion of goods damageds are low, and low energy consumption in entire regenerative process, can be realized without complex device.
Description
Technical field
The invention belongs to Regenevating Waste Activated Carbon technical fields, are related to a kind of regeneration method of active carbon.
Background technique
Active carbon possesses powerful adsorption capacity because having the pore structure of prosperity and huge specific surface area, Neng Gouyou
The removal of effect ground coloration, stink, can remove most organic pollutants and certain inorganic matters in waste water, are widely used in sewage treatment
In advanced treatment of wastewater.For example, in high slat-containing wastewater other than containing persistent organic pollutants, also containing a large amount of inorganic
Salt, and the presence of inorganic salts especially chloride ion often causes very big negative effect to the degradation of organic pollutant.For one
For a little high slat-containing wastewaters, there is preferable treatment effect using the absorption method of activated carbon adsorption organic pollutant.
With rising rapidly for active carbon consumption, how effective regeneration is carried out to waste active carbon and also increasingly cause people
Concern, and if waste active carbon cannot effective regeneration, be not only a kind of very big waste to resource, while will also cause
Secondary pollution.
The regeneration method of active carbon most mature at present is hot recycling method, i.e., by heat treatment waste active carbon, makes to be lived
Property charcoal absorption organic matter carbonize decomposition at high temperature, thus the absorption property of activity recovery charcoal.But there is work in hot recycling method
Property the problems such as charcoal proportion of goods damageds are high, the device is complicated, operation energy consumption is high.
Summary of the invention
The purpose of the present invention is to provide a kind of regeneration methods of active carbon, and at least to solve, the active carbon proportion of goods damageds are high to be asked
Topic.
To achieve the above object, an embodiment of the present invention provides a kind of regeneration method of active carbon, the regeneration side
Method includes:
The waste active carbon for adsorbing organic matter and diluent are hybridly prepared into suspension；
Prepare ferrous salt solution；
The ferrous salt solution and hydrogen peroxide are added into the suspension, obtain reaction mixture；It is mixed in the reaction
It closes in liquid, the mass ratio of organic matter and hydrogen peroxide is 1:1-2:3, and the mass ratio of ferrous ion and hydrogen peroxide is 1:1-1:3；
It is separated by solid-liquid separation, obtains regenerated carbon.
As the further improvement of an embodiment of the present invention, in the suspension, the quality hundred of the waste active carbon
Dividing concentration is 5%-50%.
As the further improvement of an embodiment of the present invention, the ferrous salt solution is ferrous sulfate solution.
As the further improvement of an embodiment of the present invention, the pH value of the reaction mixture is 3.5-4.0.
As the further improvement of an embodiment of the present invention, the step " adds the ferrous iron in Xiang Suoshu suspension
Salting liquid and hydrogen peroxide, obtain reaction mixture " include:
The ferrous salt solution is added into the suspension, and adjusting pH value with sulfuric acid solution is 3.5-4.0, it is backward
Hydrogen peroxide is added in the suspension, obtains reaction mixture.
As the further improvement of an embodiment of the present invention, after the step " preparing ferrous salt solution ", sulfuric acid is used
The pH value that solution adjusts the ferrous salt solution is 3.5-4.0, alternatively, the step " by adsorb organic matter waste active carbon and
Diluent is hybridly prepared into suspension " after, it is 3.5-4.0 with the pH value that sulfuric acid solution adjusts the suspension.
As the further improvement of an embodiment of the present invention, the regeneration method further comprises the steps of: mixed to the reaction
After closing liquid sustained response preset time period, the pH value for adjusting the reaction mixture is 7-10.
As the further improvement of an embodiment of the present invention, the pH of the reaction mixture is adjusted with sodium hydroxide solution
Value is 7-10.
As the further improvement of an embodiment of the present invention, the step " by adsorb organic matter waste active carbon and
Water is hybridly prepared into suspension " before, it is in the waste water of 2%-5% by powdered active carbon investment salt content, reaction second is pre-
If after the period, separation of solid and liquid obtains the waste active carbon.
As the further improvement of an embodiment of the present invention, " it is separated by solid-liquid separation, obtain regenerated carbon " in the step
In also obtain supernatant, the supernatant, which is applied to the step as the part diluent, " will adsorb the useless work of organic matter
Property charcoal and diluent are mixed to form suspension " in.
Compared with prior art, the beneficial effects of the present invention are: by Fenton reagent method oxidation removal waste active carbon
The organic matter of absorption, regenerated carbon is recyclable to be recycled, and the quality of the organic matter according to waste active carbon absorption, configures peroxide
The quality for changing hydrogen and ferrous ion keeps organic removal rate high, and the reclamation rate of active carbon is high, and the active carbon proportion of goods damageds are low, and entire
Low energy consumption in regenerative process, can be realized without complex device.
Detailed description of the invention
Fig. 1 is the flow chart of the regeneration method of the active carbon of an embodiment of the present invention.
Specific embodiment
Below with reference to specific embodiment shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously
The present invention is not limited, structure that those skilled in the art are made according to these embodiments, method or functionally
Transformation is included within the scope of protection of the present invention.
A kind of regeneration method of active carbon as shown in Figure 1, the regeneration method include:
The waste active carbon for adsorbing organic matter and diluent are hybridly prepared into suspension；
Prepare ferrous salt solution；
The ferrous salt solution and hydrogen peroxide are added into the suspension, obtain reaction mixture；It is mixed in the reaction
It closes in liquid, the mass ratio of organic matter and hydrogen peroxide is 1:1-2:3, and the mass ratio of ferrous ion and hydrogen peroxide is 1:1-1:3；
It is separated by solid-liquid separation, obtains regenerated carbon.
In this way, compared to the prior art, the regeneration method of active carbon of the invention is useless by Fenton reagent method oxidation removal
The organic matter adsorbed in active carbon, regenerated carbon is recyclable to be recycled, and the quality of the organic matter according to waste active carbon absorption,
The quality for configuring hydrogen peroxide and ferrous ion keeps organic removal rate high, and the reclamation rate of active carbon is high, the active carbon proportion of goods damageds
It is low, and low energy consumption in entire regenerative process, can be realized without complex device.
It should be noted that above-mentioned verbal description sequence does not limit the implementation sequence between each step of the present invention, for example,
The implementation sequence of the step " preparing ferrous salt solution " is not limited to that " waste active carbon of organic matter and dilute will be adsorbed in the step
Release agent and be hybridly prepared into suspension " after complete, that is, two steps can synchronously complete or with first suitable of either step
Sequence is completed.
Wherein, described in the step " waste active carbon for adsorbing organic matter and diluent are hybridly prepared into suspension "
Waste active carbon substantially powder level partial size, it is certainly, without being limited thereto；In the suspension, the quality percentage of the waste active carbon
Concentration is 5%-50%.
Further, the ferrous salt solution is specially ferrous sulfate solution, specific manner of formulation are as follows: is hydrated sulphur for seven
Sour ferrous iron is dissolved in water, and preparation obtains ferrous sulfate solution.
Further, the pH value of the reaction mixture is 3.5-4.0, that is to say, that includes the ferrous ion and institute
The Fenton reagent for stating hydrogen peroxide aoxidizes the organic matter adsorbed in waste active carbon in the environment of pH value is 3.5-4.0.
Specifically, there are many specific implementations for making the pH value 3.5-4.0 of the reaction mixture, such as: such as Fig. 1
Illustrated embodiment first adds the ferrous sulfate solution into the suspension, and adjusting pH value with dilution heat of sulfuric acid is 3.5-
4.0, the backward suspension in add hydrogen peroxide, obtain reaction mixture, the pH value of the reaction mixture is 3.5-
4.0；Alternatively, in the embodiment of variation, after preparation obtains the ferrous sulfate solution, directly adjusted with dilution heat of sulfuric acid described in
The pH value of ferrous sulfate solution is 3.5-4.0, adds the Asia of the sulfuric acid after having mixed up pH value into the suspension again later
Ferrous solution and hydrogen peroxide, obtain reaction mixture, and the pH value of the reaction mixture is also 3.5-4.0；Again alternatively, the reality of variation
It applies in example, is directly 3.5-4.0 with the pH value that dilution heat of sulfuric acid adjusts the suspension after being configured to the suspension, then
The ferrous sulfate solution and hydrogen peroxide are added to having mixed up in the suspension after pH value, obtains reaction mixture, the reaction is mixed
The pH value for closing liquid is also 3.5-4.0.
Further, the regeneration method further comprise the steps of: to the reaction mixture sustained response preset time period it
Afterwards, the pH value for adjusting the reaction mixture is 7-10.
Wherein, the preset time period is 1-5h, that is to say, that the sweet smell comprising the ferrous ion and the hydrogen peroxide
The time substantially 1- that the reagent that pauses aoxidizes the organic matter adsorbed in waste active carbon in the environment of pH value is 3.5-4.0
5h；Furthermore it is possible to which diluted sodium hydroxide solution is used to adjust the pH value of the reaction mixture as 7-10.Certainly, without being limited thereto.
Further, before the step " waste active carbon for adsorbing organic matter and water are hybridly prepared into suspension ",
Powdered active carbon is put into waste water, after reacting the second preset time period, is separated by solid-liquid separation and obtains the useless activity of absorption organic matter
Charcoal；Wherein, the salt content in the waste water is 2%-5%.
That is, the waste active carbon, may come from the active carbon adsorption removal organic matter of high slat-containing wastewater
Waste water treatment process.Specifically, with the ratio of mass percentage concentration 1%-3%, active carbon is put into waste water, it is anti-in full mixing
It answers after reacting second preset time period (such as 1-10h) in kettle, is separated by solid-liquid separation, is obtained by the way of precipitating and filters pressing
To the waste active carbon of solid phase and the purification water outlet of liquid phase.
It further, can be by the way of precipitating and filters pressing in the step " being separated by solid-liquid separation, obtain regenerated carbon "
It is separated by solid-liquid separation with realizing, obtains the regenerated carbon of solid phase and the supernatant of liquid phase.Wherein, the regenerated carbon can return to simultaneously
It puts into high slat-containing wastewater again, to participate in the wastewater treatment of the active carbon adsorption removal organic matter of the high slat-containing wastewater
Technique；The supernatant, which can return to and be applied to the waste active carbon again as the part diluent, prepares the suspension
During, namely in step " waste active carbon for adsorbing organic matter and diluent are mixed to form suspension ", the dilution
Agent may include tap water and the supernatant.
In this way, compared to the prior art, the regeneration method of active carbon of the invention is useless by Fenton reagent method oxidation removal
The organic matter adsorbed in active carbon, regenerated carbon is recyclable to be recycled, and the quality of the organic matter according to waste active carbon absorption,
The quality for configuring hydrogen peroxide and ferrous ion keeps organic removal rate high, and the reclamation rate of active carbon is high, the active carbon proportion of goods damageds
It is low；On the other hand, the supernatant can be used as the part diluent repeatedly, save Water Energy.
In the following, being introduced by regeneration method of the specific experiment embodiment to active carbon of the invention.
Embodiment 1
In the present embodiment, for the waste water of certain agricultural chemicals manufacturing enterprise, the chemical oxygen demand of the waste water before treatment
Measure (full name in English Chemical Oxygen Demand, hereinafter referred to as COD) be 150-200mg/l, salt content 3%-5%,
In conjunction with the regeneration method of active carbon of the invention, the wastewater treatment of active carbon adsorption removal organic matter, mistake are carried out to the waste water
Journey is as follows:
The first step is put into powdered active carbon in full hybrid reactor with the ratio of mass percentage concentration 1%-3%
In waste water, after reacting 5-10h, separation of solid and liquid is realized by the way of precipitating and filters pressing, obtains the useless of the absorption organic matter of solid phase
The purification of active carbon and liquid phase is discharged；
Waste active carbon obtained in the first step and water are hybridly prepared into suspension by second step, in the suspension, activity of giving up
The mass percentage concentration of charcoal is 5%-50%；
Third step, first into the suspension made from second step, addition shifts to an earlier date prepared ferrous sulfate solution, the sulphur
Sour ferrous iron solution is prepared in such a way that green vitriol is dissolved in water；Adjusting pH value with dilution heat of sulfuric acid again is
3.5-4.0；Hydrogen peroxide is added later, obtains reaction mixture；
In the third step, the additive amount of ferrous sulfate solution and hydrogen peroxide is adsorbed according to waste active carbon in the suspension
The amount of organic matter be determined, meet: in the reaction mixture, the mass ratio of organic matter and hydrogen peroxide is 1:1-2:
3, the mass ratio of ferrous ion and hydrogen peroxide is 1:1-1:3；
4th step, the reaction mixture adjust the reaction after sustained response 3-5h, using diluted sodium hydroxide solution
The pH value of mixed liquor is 7-10；
5th step is separated by solid-liquid separation the reaction mixture in the 4th step by the way of precipitating and filters pressing, consolidate
The regenerated carbon of phase and the supernatant of liquid phase；
6th step puts into regenerated carbon obtained in the 5th step in the full hybrid reactor in the first step again,
Recycled；And supernatant obtained in the 5th step is reused in second step, substitute second step in part water with
Waste active carbon prepares suspension.
According to statistics and measurement, in the present embodiment, the regeneration losses rate of active carbon is 10%, can reuse number 5-10
It is secondary；Also, the purification water outlet COD in the first step maintains 50mg/l always hereinafter, substantially 35-50mg/l, reaches discharge mark
It is quasi-.It can thus be seen that the regeneration method using active carbon of the invention regenerates the waste active carbon of absorption organic matter, then
Fruit of coming into force is good.
Embodiment 2
In the present embodiment, for the waste water of certain DYE PRODUCTION enterprise, the COD of the waste water before treatment is 280-350mg/
L, salt content 2%-4%, in conjunction with the regeneration method of active carbon of the invention, carrying out active carbon adsorption removal to the waste water has
The wastewater treatment of machine object, process are as follows:
The first step is put into powdered active carbon in full hybrid reactor with the ratio of mass percentage concentration 1%-3%
In waste water, after reacting 5-10h, separation of solid and liquid is realized by the way of precipitating and filters pressing, obtains the waste active carbon and liquid of solid phase
The purification of phase is discharged；
Waste active carbon obtained in the first step and water are mixed to form suspension by second step, in the suspension, waste active carbon
Mass percentage concentration be 5%-50%；
Third step, first into the suspension made from second step, addition shifts to an earlier date prepared ferrous sulfate solution, the sulphur
Sour ferrous iron solution is prepared in such a way that green vitriol is dissolved in water；Adjusting pH value with dilution heat of sulfuric acid again is
3.5-4.0；Hydrogen peroxide is added later, obtains reaction mixture；
In the third step, the additive amount of ferrous sulfate solution and hydrogen peroxide is adsorbed according to waste active carbon in the suspension
The amount of organic matter be determined, meet: in the reaction mixture, the mass ratio of organic matter and hydrogen peroxide is 1:1-2:
3, the mass ratio of ferrous ion and hydrogen peroxide is 1:1-1:3；
4th step, the reaction mixture adjust the reaction after sustained response 4-8h, using diluted sodium hydroxide solution
The pH value of mixed liquor is 7-10；
5th step is separated by solid-liquid separation the reaction mixture in the 4th step by the way of precipitating and filters pressing, consolidate
The regenerated carbon of phase and the supernatant of liquid phase；
6th step puts into regenerated carbon obtained in the 5th step in the full hybrid reactor in the first step again,
Recycled；And supernatant obtained in the 5th step is reused in second step, substitute second step in part water with
Waste active carbon prepares suspension.
According to statistics and measurement, in the present embodiment, the regeneration losses rate of active carbon is 20%, can be reuse number 4-6 times；
Also, the purification water outlet COD in the first step maintains 80mg/l always hereinafter, substantially 60-80mg/l, reaches discharge standard.
It can thus be seen that the regeneration method using active carbon of the invention regenerates the waste active carbon of absorption organic matter, regenerate
Effect is good.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of regeneration method of active carbon, it is characterised in that: the regeneration method includes:
The waste active carbon for adsorbing organic matter and diluent are hybridly prepared into suspension；
Prepare ferrous salt solution；
The ferrous salt solution and hydrogen peroxide are added into the suspension, obtain reaction mixture；In the reaction mixture
In, the mass ratio of organic matter and hydrogen peroxide is 1:1-2:3, and the mass ratio of ferrous ion and hydrogen peroxide is 1:1-1:3；
It is separated by solid-liquid separation, obtains regenerated carbon.
2. the regeneration method of active carbon according to claim 1, it is characterised in that: in the suspension, the useless work
Property charcoal mass percentage concentration be 5%-50%.
3. the regeneration method of active carbon according to claim 1, it is characterised in that: the ferrous salt solution is ferrous sulfate
Solution.
4. the regeneration method of active carbon according to claim 1, it is characterised in that: the pH value of the reaction mixture is
3.5-4.0。
5. the regeneration method of active carbon according to claim 4, it is characterised in that: the step is " in Xiang Suoshu suspension
The ferrous salt solution and hydrogen peroxide are added, reaction mixture is obtained " include:
Add the ferrous salt solution into the suspension, and adjusting pH value with sulfuric acid solution is 3.5-4.0, it is backward described in
Hydrogen peroxide is added in suspension, obtains reaction mixture.
6. the regeneration method of active carbon according to claim 4, it is characterised in that: the step " preparing ferrous salt solution "
It later, is 3.5-4.0 with the pH value that sulfuric acid solution adjusts the ferrous salt solution, alternatively, the step " will adsorb organic matter
Waste active carbon and diluent are hybridly prepared into suspension " after, it is 3.5- with the pH value that sulfuric acid solution adjusts the suspension
4.0。
7. the regeneration method of active carbon according to claim 1, it is characterised in that: the regeneration method further comprises the steps of:
After the reaction mixture sustained response preset time period, the pH value for adjusting the reaction mixture is 7-10.
8. the regeneration method of active carbon according to claim 7, it is characterised in that: adjusted with sodium hydroxide solution described anti-
The pH value for answering mixed liquor is 7-10.
9. the regeneration method of active carbon according to claim 1, it is characterised in that: " organic matter will be adsorbed in the step
Waste active carbon and water be hybridly prepared into suspension " before, by powdered active carbon investment salt content be 2%-5% waste water
In, after reacting the second preset time period, separation of solid and liquid obtains the waste active carbon.
10. the regeneration method of active carbon according to claim 1, it is characterised in that: " be separated by solid-liquid separation, obtain in the step
To regenerated carbon " in also obtain supernatant, the supernatant, which is applied to the step as the part diluent, " will adsorb
The waste active carbon and diluent of organic matter are mixed to form suspension " in.
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| CN110605108A (en) * | 2019-09-26 | 2019-12-24 | 西安建筑科技大学 | Method for regenerating desulfurization and denitrification waste active carbon |
| CN112156752A (en) * | 2020-09-22 | 2021-01-01 | 中国科学院宁波材料技术与工程研究所 | Modified activated carbon with reproducible adsorbability and application thereof in wastewater treatment |
| CN112875939A (en) * | 2021-04-09 | 2021-06-01 | 盐城工学院 | Integrated circulating sewage treatment device based on adsorption-Fenton |
| CN113860564A (en) * | 2021-10-28 | 2021-12-31 | 武汉工程大学 | Fenton oxidation regeneration of active carbon and treatment method of refractory organic wastewater |
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| CN113860564A (en) * | 2021-10-28 | 2021-12-31 | 武汉工程大学 | Fenton oxidation regeneration of active carbon and treatment method of refractory organic wastewater |
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