CN108176350A - A kind of technique for preparing Low Cost Sorbents using coal quality flying dust - Google Patents
A kind of technique for preparing Low Cost Sorbents using coal quality flying dust Download PDFInfo
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- CN108176350A CN108176350A CN201810075800.8A CN201810075800A CN108176350A CN 108176350 A CN108176350 A CN 108176350A CN 201810075800 A CN201810075800 A CN 201810075800A CN 108176350 A CN108176350 A CN 108176350A
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- Prior art keywords
- flying dust
- coal quality
- low cost
- adsorbent
- preparing low
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Classifications
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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
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Abstract
The present invention provides a kind of techniques that Low Cost Sorbents are prepared using coal quality flying dust, have the feature that, include the following steps：Step 1, coal quality flying dust is subjected to zeolitization processing, flying dust after being handled；Step 2, flying dust, sodium hydroxide and water are mixed after weighing processing, obtain the suspension of certain mass concentration；Step 3, suspension is added in reactive tank and is stirred to obtain slurry；Step 4, after slurry stands 1h~10h at room temperature, microwave radiation is carried out to lower sediment so as to obtain adsorbent；Step 5, industrial wastewater is pre-processed, obtains the pretreated waste water of predetermined concentration；Step 6, adsorbent is added in pretreated waste water, 50~500 revs/min of vibrator is used to carry out mixing of the residence time for 5min~for 24 hours, obtains mixed liquor；Step 7, whizzer is used to carry out the separation that the time is 10min~60min to mixed liquor, removes lower sediment so as to solution after being handled.
Description
Technical field
The present invention relates to a kind of preparation processes of adsorbent, and in particular to a kind of to prepare low cost absorption using coal quality flying dust
The technique of agent.
Background technology
Coal is always the mostly important fossil energy for supporting China's development, and in the future for a long period of time,
Its status will not all change.
But for a long time, the utilization of coal is all based on combustion power generation, and a large amount of flying dusts of generation can not utilize.Together
When, with the continuous development of industry, a large amount of waste water can not be handled adequately, wherein using mercury as the heavy metal pollution of representative
It is particularly acute.In addition, industrial production discharge plurality of heavy metal soil, water source and crops etc. can all be caused it is irreversible
Harm.
The study found that there is good catharsis to the heavy metal in waste water using coal quality flying dust as matrix.The present invention is exactly
Carbon-based coal ash is made full use of, adsorbent is produced by modification, so as to reach the utilization of coal quality flying dust and sewage disposal
Double action.
Invention content
The present invention be to solve the above-mentioned problems and carry out, and it is an object of the present invention to provide it is a kind of using coal quality flying dust prepare it is low into
The technique of this adsorbent.
The present invention provides a kind of techniques that Low Cost Sorbents are prepared using coal quality flying dust, use coal quality flying dust as raw material
It produces adsorbent and adsorption treatment is carried out to the heavy metal in industrial wastewater, have the feature that, include the following steps：
Step 1, coal quality flying dust is added in reactor, zeolitization processing is carried out under microwave irradiation conditions, is handled
Flying dust afterwards；
Step 2, flying dust and sodium hydroxide after handling are weighed according to certain mass ratio, and adds in water and is mixed, is obtained
The suspension of certain mass concentration；
Step 3, suspension is added in reactive tank and is stirred to obtain slurry；
Step 4, after slurry stands 1h~10h at room temperature, supernatant liquor is discarded, microwave radiation is carried out to lower sediment
So as to obtain adsorbent；
Step 5, pretreatment is diluted or concentrated to industrial wastewater, obtains the pretreated waste water of predetermined concentration；
Step 6, by adsorbent add in pretreated waste water in, use 50~500 revs/min vibrator carry out the residence time for
The mixing of 5min~for 24 hours, obtains mixed liquor；
Step 7, whizzer is used to carry out separation of the time for 10min~60min to mixed liquor, removes lower sediment
So as to solution after being handled.
The technique of Low Cost Sorbents is prepared using coal quality flying dust provided by the invention, there can also be such spy
Sign：Wherein, in step 2, certain mass ratio is that the mass ratio of flying dust and sodium hydroxide is 1~10 after handling:1~10.
The technique of Low Cost Sorbents is prepared using coal quality flying dust provided by the invention, there can also be such spy
Sign：Wherein, in step 2, a concentration of 10g/L~100g/L of certain mass.
The technique of Low Cost Sorbents is prepared using coal quality flying dust provided by the invention, there can also be such spy
Sign：Wherein, in step 2, a concentration of 100g/L of certain mass.
The technique of Low Cost Sorbents is prepared using coal quality flying dust provided by the invention, there can also be such spy
Sign：Wherein, in step 3, the temperature of stirring is 30 DEG C~90 DEG C, and the time of stirring is 6h~18h.
The technique of Low Cost Sorbents is prepared using coal quality flying dust provided by the invention, there can also be such spy
Sign：Wherein, in step 4, the time of microwave radiation is 10min~60min.
The technique of Low Cost Sorbents is prepared using coal quality flying dust provided by the invention, there can also be such spy
Sign：Wherein, in steps of 5, predetermined concentration is 5mg/L~40mg/L.
The technique of Low Cost Sorbents is prepared using coal quality flying dust provided by the invention, there can also be such spy
Sign：Wherein, the heavy metal in industrial wastewater is mainly mercury.
The effect of invention
Prepared in the technique of Low Cost Sorbents according to a kind of coal quality flying dust according to the present invention, use coal quality flying dust for
Waste adsorbent, not only reduces the manufacturing cost of adsorbent, and can be effectively in adsorption for disposing industrial effluent weight
Metal.Therefore, the technique that coal quality flying dust of the invention prepares Low Cost Sorbents has low cost, high efficiency and environmentally protective
Advantage.
Specific embodiment
In order to which the technological means for realizing the present invention is easy to understand with effect, the present invention is made with reference to embodiments
It is specifically described.
In following embodiment, the heavy metal in industrial wastewater is mainly mercury.
<Embodiment 1>
A kind of coal quality flying dust prepares the technique of Low Cost Sorbents, includes the following steps：
Step 1, coal quality flying dust is added in reactor, zeolitization processing is carried out under microwave irradiation conditions, is handled
Flying dust afterwards.
Step 2, according to mass ratio 1:5 weigh flying dust and sodium hydroxide after processing, and add in 1L water and mixed, and obtain
The suspension of 10g/L mass concentrations.
Step 3, suspension is added in reactive tank and is stirred to obtain slurry.In the present embodiment, the temperature of stirring is
30 DEG C~90 DEG C, the time of stirring is 6h~18h.
Step 4, after slurry stands 1h~10h at room temperature, supernatant liquor is discarded, microwave radiation is carried out to lower sediment
So as to obtain adsorbent.In the present embodiment, the time of microwave radiation is 10min~60min.
Step 5, pretreatment is diluted or concentrated to industrial wastewater, obtains the pretreated waste water of 20mg/L predetermined concentrations.
In the present embodiment, dilution processing is by the way that water is added to be diluted, and concentration is concentrated by evaporation.
Step 6,2g adsorbents are added in pretreated waste water, residence time difference is carried out using 100 revs/min of vibrators
For the mixing of 10min~300min, mixed liquor is obtained.
Step 7, whizzer is used to carry out separation of the time for 30min to mixed liquor, removal lower sediment is so as to obtain
Solution after to processing.
Step 8, it solution and is recorded after detection process.
In the present embodiment, after adsorbent prepared by the suspension of 10g/L mass concentrations carries out mixing and absorption to industrial wastewater
Obtained heavy metal removing rate is as shown in table 1.
<Embodiment 2>
In the present embodiment 2, for the step and condition identical in embodiment 1, identical explanation is omitted.
In the present embodiment in step 2, according to mass ratio 1:5 weigh flying dust and sodium hydroxide after processing, and add in 1/3L
Water is mixed, and obtains the suspension of 30g/L mass concentrations, remaining implementation steps and condition are identical with example 1.
Experimental result detects to obtain, and adsorbent prepared by the suspension of 30g/L mass concentrations mixes industrial wastewater
The heavy metal removing rate obtained after absorption is as shown in table 1.
<Embodiment 3>
In the present embodiment 3, for the step and condition identical in embodiment 1, identical explanation is omitted.
In the present embodiment in step 2, according to mass ratio 1:5 weigh flying dust and sodium hydroxide after processing, and add in 1/5L
Water is mixed, and obtains the suspension of 50g/L mass concentrations, remaining implementation steps and condition are identical with example 1.
Experimental result detects to obtain, and adsorbent prepared by the suspension of 50g/L mass concentrations mixes industrial wastewater
The heavy metal removing rate obtained after absorption is as shown in table 1.
<Embodiment 4>
In the present embodiment 4, for the step and condition identical in embodiment 1, identical explanation is omitted.
In the present embodiment in step 2, according to mass ratio 1:5 weigh flying dust and sodium hydroxide after processing, and add in 1/7L
Water is mixed, and obtains the suspension of 70g/L mass concentrations, remaining implementation steps and condition are identical with example 1.
Experimental result detects to obtain, and adsorbent prepared by the suspension of 70g/L mass concentrations mixes industrial wastewater
The heavy metal removing rate obtained after absorption is as shown in table 1.
<Embodiment 5>
In the present embodiment 5, for the step and condition identical in embodiment 1, identical explanation is omitted.
In the present embodiment in step 2, according to mass ratio 1:5 weigh flying dust and sodium hydroxide after processing, and add in 1/10L
Water is mixed, and obtains the suspension of 100g/L mass concentrations, remaining implementation steps and condition are identical with example 1.
Experimental result detects to obtain, and adsorbent prepared by the suspension of 100g/L mass concentrations mixes industrial wastewater
The heavy metal removing rate obtained after absorption is as shown in table 1.
In order to reduce error, the adsorption treatment of 3~5 times is repeated to above example, as a result fluctuates small, therefore phase
Data are closed to be averaged.Concrete outcome is as shown in table 1 below.
Adsorbent prepared by the different suspension concentrations of table 1 is to the removal rate result of mercury in same concentrations pretreated waste water
The effect of embodiment
The technique that Low Cost Sorbents are prepared according to a kind of coal quality flying dust that the present embodiment is mentioned uses coal quality flying dust as original
Material produces adsorbent, not only reduces the manufacturing cost of adsorbent, and can be effectively in adsorption for disposing industrial effluent a huge sum of money
Belong to Hg, the reason is that adsorbent made from burned-coal fly ash is physical absorption and chemical reaction to the suction-operated of heavy metal Hg in sewage
Coefficient result.
Such as table 1, according to the experimental result of embodiment 1 it is found that first 100 minutes or so started in absorption, during with stopping
Between extension, the rate of adsorption of heavy metal Hg increases, and adsorption efficiency quickly improves, but after 100 minutes heavy metal Hg removal rate
It tends towards stability.Similarly, the removal rate variation of heavy metal Hg is identical with the conclusion of embodiment 1 in 2~embodiment of embodiment 5.It says
It is bright for same adsorbent, with the extension of adsorbent and industrial wastewater residence time, the removal of mercury metal take the lead in after speeding by
Gradually stablize.
Such as table 1, according to the experimental result of 1~embodiment of embodiment 5 it is found that under the identical residence time, mercury metal
Removal rate is gradually increased with the increase for the suspension concentration for preparing adsorbent.When suspension concentration is 100g/L, produce
Adsorbent adsorption effect it is best, the removal rate of mercury metal can reach 95%, and 70min stops within the 30min residence times
The removal rate of mercury metal after the time is stayed to tend towards stability, reaches 98%.Illustrate the adsorbent produced when suspension concentration is 100g/L
Adsorbing metal mercury rate it is fast, effect is good.
By above-described embodiment it is found that residence time and suspension concentration be influence adsorbent adsorption effect it is main because
Element, especially suspension concentration.Because the difference of suspension concentration can cause to adsorb the difference of the characteristics such as hole, active site position,
And then influence diffusion rate of the heavy metal in waste liquid in adsorbent surface, so as in adsorption process, the speed of absorption mainly by
External mass transfer control, secondly internal diffusing qualities transfer, so restriction effect of the suspension concentration to adsorption effect
Bigger.
In addition, the study found that the variation tendency that continuously decreases is presented with the extension of residence time in activated carbon adsorption rate, with
Adsorbent made from coal quality flying dust is opposite.Its reason is mainly：Activated carbon is physical absorption, is by its microscopic void and inside
The active carbonaceous of distribution carries out physical treatment, with going deep into for adsorption process, can generate physical clogging, make the absorption of adsorbent
Ability reduces, so as to reduce adsorption efficiency.Therefore, adsorbent, the rate of adsorption made from coal quality flying dust are gradually increased,
The presence of chemisorbed is further proved.
Therefore, the technique that coal quality flying dust of the invention prepares Low Cost Sorbents has low cost, high efficiency and green ring
The advantages of guarantor.
Preferred case of the above embodiment for the present invention, is not intended to limit protection scope of the present invention.
In the present embodiment, in step 2, the mass ratio of flying dust and sodium hydroxide is 1 after processing:5, in steps of 5, make a reservation for
A concentration of 20mg/L；But in the present invention, the mass ratio of flying dust and sodium hydroxide can also be 1~10 after processing:1~10,
Predetermined concentration can also be 5mg/L~40mg/L.
Claims (8)
1. a kind of technique that Low Cost Sorbents are prepared using coal quality flying dust, it is waste adsorbent to work to use coal quality flying dust
Heavy metal in industry waste water carries out adsorption treatment, which is characterized in that includes the following steps：
Step 1, the coal quality flying dust is added in reactor, zeolitization processing is carried out under microwave irradiation conditions, is handled
Flying dust afterwards；
Step 2, flying dust and sodium hydroxide after the processing are weighed according to certain mass ratio, and adds in water and mixed, obtained
The suspension of certain mass concentration；
Step 3, the suspension is added in reactive tank and is stirred to obtain slurry；
Step 4, after the slurry stands 1h~10h at room temperature, supernatant liquor is discarded, microwave radiation is carried out to lower sediment
So as to obtain the adsorbent；
Step 5, the industrial wastewater is diluted or is concentrated pretreatment, obtain the pretreated waste water of predetermined concentration；
Step 6, the adsorbent is added in the pretreated waste water, when being stopped using 50~500 revs/min of vibrator
Between mixing for 5min~for 24 hours, obtain mixed liquor；
Step 7, whizzer is used to carry out separation of the time for 10min~60min to the mixed liquor, removes lower sediment
So as to solution after being handled.
2. the technique according to claim 1 for preparing Low Cost Sorbents using coal quality flying dust, it is characterised in that：
Wherein, in the step 2, the certain mass ratio is the mass ratio of flying dust and the sodium hydroxide after the processing
It is 1~10:1~10.
3. the technique according to claim 1 for preparing Low Cost Sorbents using coal quality flying dust, it is characterised in that：
Wherein, in the step 2, a concentration of 10g/L~100g/L of certain mass.
4. the technique according to claim 3 for preparing Low Cost Sorbents using coal quality flying dust, it is characterised in that：
Wherein, in the step 2, a concentration of 100g/L of certain mass.
5. the technique according to claim 1 for preparing Low Cost Sorbents using coal quality flying dust, it is characterised in that：
Wherein, in the step 3, the temperature of the stirring is 30 DEG C~90 DEG C,
The time of the stirring is 6h~18h.
6. the technique according to claim 1 for preparing Low Cost Sorbents using coal quality flying dust, it is characterised in that：
Wherein, in the step 4, the time of the microwave radiation is 10min~60min.
7. the technique according to claim 1 for preparing Low Cost Sorbents using coal quality flying dust, it is characterised in that：
Wherein, in the step 5, the predetermined concentration is 5mg/L~40mg/L.
8. the technique according to claim 1 for preparing Low Cost Sorbents using coal quality flying dust, it is characterised in that：
Wherein, the heavy metal in the industrial wastewater is mainly mercury.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109200995A (en) * | 2018-09-03 | 2019-01-15 | 中成未来新材料（福建）有限公司 | A kind of preparation process of environmental-protection adsorption material |
| CN109200996A (en) * | 2018-09-03 | 2019-01-15 | 中成未来新材料（福建）有限公司 | A kind of preparation method of artificial zeolite's adsorbent material for sewage treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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