CN109876785A - A kind of method of ultrasonic wave added low melting point solid peracid regeneration waste active carbon - Google Patents
A kind of method of ultrasonic wave added low melting point solid peracid regeneration waste active carbon Download PDFInfo
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- CN109876785A CN109876785A CN201910282342.XA CN201910282342A CN109876785A CN 109876785 A CN109876785 A CN 109876785A CN 201910282342 A CN201910282342 A CN 201910282342A CN 109876785 A CN109876785 A CN 109876785A
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- active carbon
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Abstract
The invention discloses a kind of method of ultrasonic wave added low melting point solid peracid regeneration waste active carbon, ultrasonic wave can produce mechanical effect, cavitation effect, fuel factor and chemical effect in the medium, promotes melting acid well into active carbon hole, adsorbate is removed.Meanwhile the cavitation effect and chemical effect of ultrasonic wave will promote reacting for adsorbate and solid peracid, to change the chemical property of adsorbate, have better compatibility with medium, reach regeneration purpose under conditions of low energy consumption low chemical reagent consumption.
Description
Technical field
The invention belongs to regenerating active carbon fields, and in particular to a kind of ultrasonic wave added low melting point solid peracid regeneration waste active carbon
Method.
Background technique
Active carbon has the characteristics that hole prosperity, large specific surface area, and it is relatively strong that this has active carbon to gas or liquid
Adsorption capacity, to play the role of purification.However, activated carbon adsorption will reach saturation for a period of time, processing is general
There are two types of: first is that being discarded, being buried and burning disposal, it will cause environmental pollution in this way, can also generate high use cost；Two
It is to be regenerated to it, but there are energy consumption height, deficiency at high cost for conventional regeneration technology.The high cost of active carbon uses, is useless
Abandoning active carbon results in waste of resources and secondary pollution problem, strongly limits it in the application of every field.The regeneration of active carbon
Method is more, and physical method mainly has hot recycling, micro wave regeneration, ultrasonic regeneration, shooting flow method of reproduction, and chemical method includes lye
Regeneration, electrochemistry etc., bioanalysis include microorganisms reproduction method.Hot recycling is most common active carbon regenerating technology, but has energy
The disadvantage that consumption is big, loss is high, cost of equipment is high；Electrochemical regeneration is easy to operate, but process object is restricted；Bio-regeneration
It is most economical method, but needs to take a long time, is influenced by water quality and temperature very big.
Ultrasonic regeneration method is generated under sound wave suction function in certain frequency and super-strength acoustic irradiation solution
Vacuolation is then collapsed rapidly under sound wave positive pressure, is formed " hot spot ", pressure and temperature acts on adsorbent surface, subtracts
Its weak binding force；Vacuolation simultaneously makes aquathermolysis at hydroxyl radical free radical, has very strong oxidisability, has stronger revival
Fruit.
Solid peracid in the molten state, has its unique performance.Melting acid has very strong degradation to organic adsorbate
Partial adsorbates matter quickly can be degraded into small molecule by catalytic action, and is carried out catalysis and change chemical property, it is dissolved in
In acid, the removing of adsorbate is realized, reach regenerated purpose.Such as the craboraffin for adsorption saturation, solid peracid can incite somebody to action
Disaccharides is degraded into monosaccharide, by monosaccharide hydroxyl by catalysis carboxyl grafting, is easily more soluble among acid, reaches regeneration purpose.Together
When, the solid peracid of molten condition can be considered a kind of solvent, to the adsorbate that can not be degraded, have certain dissolution, into one
Step improves the regeneration effect of active carbon.
Active carbon is widely used in adsorption process, but maximum obstacle is the higher cost of adsorbent in its use process,
And regeneration energy consumption is higher after adsorption saturation, yield is lower, easily causes secondary pollution.Therefore, new regeneration method is found, with
Energy consumption is reduced, reaches active carbon and recycles, it appears it is extremely urgent, the hot spot of research tackling key problem will be become.The present invention is using super
The method that sound assists low melting point solid peracid is used for the regeneration of active carbon, regenerating active carbon process economics will be promoted feasible, to development
Low-carbon economy, promote energy-saving and emission-reduction, preserve the ecological environment and sustainable development have great strategic significance.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of ultrasonic wave added low melting point solid peracid regeneration waste active carbon.Solid peracid
In the molten state, there is its unique performance.Melting acid has very degradation catalytic action by force to organic adsorbate, can be fast
Partial adsorbates matter is degraded into small molecule by speed, and is carried out catalysis and change chemical property, is dissolved in it in acid, is realized adsorbate
Removing, reach regenerated purpose.Ultrasonic wave can produce mechanical effect, cavitation effect, fuel factor and chemistry effect in the medium
It answers, melting acid will be promoted well into active carbon hole, adsorbate is removed, reach regeneration purpose.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of method of ultrasonic wave added low melting point solid peracid regeneration waste active carbon, specifically includes the following steps:
(1) solid peracid is heated to molten condition, discarded active carbon is then added；
(2) ultrasonic power, ultrasonic time, ultrasonic temperature are adjusted, regenerating active carbon is carried out, makes solid peracid well into active carbon hole
Adsorbate is hydrolyzed and is eluted in gap, obtains discarded active carbon-melting solid-state acid blend；
(3) it is cooled to 60-90 DEG C to the resulting discarded active carbon of step (2)-melting solid-state acid blend, hot water is added, while hot
Filtering, and continuing to be washed with hot water to pH value is 5-7；
(4) active carbon after the washing of step (3) hot water is dried, regenerated carbon can be obtained, and filtrate is evaporated and is tied
Crystalline substance obtains solid peracid after the recovery, is recycled.
Step (1) heating temperature is 60-190 DEG C.
The mass ratio of step (1) the discarded active carbon and solid peracid is 1:10-1:20.
Step (1) described solid peracid includes one of technical grade succinic acid or technical grade oxalic acid.
Step (2) ultrasonic power is 100-800W, and 60-190 DEG C of ultrasonic temperature, the processing time is 10-120min.
The temperature of step (3) described hot water is 50-100 DEG C.
The present invention has the advantages that
(1) solid peracid unique performance in the molten state is utilized, there is very strong degradation catalytic action to organic adsorbate,
Adsorbate quickly can be degraded into small molecule, and be carried out catalysis and change chemical property, be dissolved in it in acid, realize adsorbate
Removing, reach regenerated purpose.
(2) present invention applies energy to activated carbon adsorption surface using ultrasound, and spherical surface waveshape transmits in the solution, passes through
The cavitation effect of generation makes aquathermolysis at hydroxyl radical free radical, efficiently separates organic pollutant by the effect for being pyrolyzed and aoxidizing.
(3) present invention with traditional heat again compared with, absorption property improves, favorable regeneration effect, has that heating speed is fast, heating
The advantages that stable, highly-safe.
(4) solid peracid used in the present invention is non-hazardous to environment, and easily recycles, and can reuse, environmentally protective, is
A kind of safe, high-efficient, easy to operate technology.
Specific embodiment
Embodiment 1
150g succinic acid is heated to 185 DEG C, after melting succinic acid completely, 15g is added and discards active carbon, 185 DEG C of constant temperature, surpasses
Acoustical power 500W, reaction 1 hour obtain discarded active carbon-melting acid blend；Then active carbon to be discarded-melting acid-mixed is closed
Object is cooled to 90 DEG C, and by 20mL, 50 DEG C of hot water is added in said mixture, filters while hot, continues that 50 DEG C of 30mL are added every time
Hot water washing, until pH is 5-7, drying.Filtrate is through evaporative crystallization recycling succinic acid to recycle.
The specific surface area that active carbon is discarded in this example is 636m2/ g, iodine sorption value 567mg/g, what is obtained lives again
Property charcoal specific surface area be 1030m2/ g, iodine sorption value 860mg/g.
Embodiment 2
200g oxalic acid is heated to 105 DEG C, after melting oxalic acid completely, 10g is added and discards active carbon, at 105 DEG C of constant temperature, ultrasound
Power 600W, reaction 2 hours obtain discarded active carbon-melting acid blend；Active carbon to be discarded-melting acid blend cooling
To 60 DEG C, by 10mL, 60 DEG C of hot water is added in said mixture, filters while hot, continues that 60 DEG C of hot water wash of 20mL are added every time
It washs, until pH is 5-7, drying.Filtrate is through evaporative crystallization recycling oxalic acid to recycle.
The specific surface area that active carbon is discarded in this example is 636m2/ g, iodine sorption value 567mg/g, obtains regeneration activity
The specific surface area of charcoal is 1340m2/ g, iodine sorption value 1016mg/g.
Comparative example 1
150g succinic acid is heated to 185 DEG C, after melting succinic acid completely, 15g is added and discards active carbon, at 185 DEG C of constant temperature
Reason 2 hours obtains discarded active carbon-melting acid blend；Active carbon to be discarded-melting acid blend is cooled to 90 DEG C, will
20mL, 50 DEG C of hot water are added in said mixture, filter while hot, continue that 50 DEG C of hot water washings of 30mL are added every time, until pH is
5-7, drying.Filtrate is through evaporative crystallization recycling succinic acid to recycle.
The specific surface area for the regenerated carbon that this comparative example obtains is 906m2/ g, iodine sorption value 813mg/g.
Comparative example 2
200g oxalic acid is heated to 105 DEG C, after melting oxalic acid completely, 10g is added and discards active carbon, 105 DEG C of constant temperature processing 2 are small
When, obtain discarded active carbon-melting acid blend.Active carbon to be discarded-melting acid blend is cooled to 60 DEG C, by 20mL, 60
DEG C hot water be added in said mixture, filter while hot, 10mL 60 DEG C of hot water washing be added every time, until pH is 5-7, drying.Filter
Liquid is through evaporative crystallization recycling oxalic acid to recycle.
The specific surface area for the regenerated carbon that this comparative example obtains is 1240m2/ g, iodine sorption value 986mg/g.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (6)
1. a kind of method of ultrasonic wave added low melting point solid peracid regeneration waste active carbon, which is characterized in that specifically includes the following steps:
(1) solid peracid is heated to molten condition, discarded active carbon is then added；
(2) ultrasonic power, ultrasonic time, ultrasonic temperature are adjusted, regenerating active carbon is carried out, makes solid peracid well into active carbon hole
Adsorbate is hydrolyzed and is eluted in gap, obtains discarded active carbon-melting solid-state acid blend；
(3) it is cooled to 60-90 DEG C to the resulting discarded active carbon of step (2)-melting solid-state acid blend, hot water is added, while hot
Filtering, and continuing to be washed with hot water to pH value is 5-7；
(4) active carbon after the washing of step (3) hot water is dried, regenerated carbon can be obtained, and filtrate is evaporated and is tied
Crystalline substance obtains solid peracid after the recovery, is recycled.
2. a kind of method of ultrasonic wave added low melting point solid peracid regeneration waste active carbon according to claim 1, which is characterized in that
Step (1) heating temperature is 60-190 DEG C.
3. a kind of method of ultrasonic wave added low melting point solid peracid regeneration waste active carbon according to claim 1, which is characterized in that
The mass ratio of step (1) the discarded active carbon and solid peracid is 1:10-1:20.
4. a kind of method of ultrasonic wave added low melting point solid peracid regeneration waste active carbon according to claim 1, which is characterized in that
Step (1) described solid peracid includes one of technical grade succinic acid or technical grade oxalic acid.
5. a kind of method of ultrasonic wave added low melting point solid peracid regeneration waste active carbon according to claim 1, which is characterized in that
Step (2) ultrasonic power is 100-800W, and 60-190 DEG C of ultrasonic temperature, the processing time is 10-120min.
6. a kind of method of ultrasonic wave added low melting point solid peracid regeneration waste active carbon according to claim 1, which is characterized in that
The temperature of step (3) described hot water is 50-100 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110538646A (en) * | 2019-08-26 | 2019-12-06 | 国网天津市电力公司电力科学研究院 | Sulfur hexafluoride adsorbent regeneration device and use method |
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| CN110538646A (en) * | 2019-08-26 | 2019-12-06 | 国网天津市电力公司电力科学研究院 | Sulfur hexafluoride adsorbent regeneration device and use method |
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