CN108046481A - A kind of expanded graphite wastewater treatment method - Google Patents
A kind of expanded graphite wastewater treatment method Download PDFInfo
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- CN108046481A CN108046481A CN201810078280.6A CN201810078280A CN108046481A CN 108046481 A CN108046481 A CN 108046481A CN 201810078280 A CN201810078280 A CN 201810078280A CN 108046481 A CN108046481 A CN 108046481A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/02—Oxides; Hydroxides
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
- C02F1/64—Heavy metal compounds of iron or manganese
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- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- 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
- C02F2101/101—Sulfur compounds
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- 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
- C02F2101/206—Manganese or manganese compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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Abstract
The invention discloses a kind of expanded graphite wastewater treatment methods, handle recovery pond, calcium sulfate generate pond, pH value regulating reservoir by primary sedimentation tank, manganese, then go out water circulation use.The expanded graphite waste water that method through the present invention is handled, pH value are less than 70mg/L, Mn for 78, SS2+Less than 2mg/L, reach《Integrated wastewater discharge standard》First discharge standard, processed waste water can be recycled.By technical scheme, after expanded graphite production waste water first passes through pretreatment, using Treatment for Reuse so that final waste water after treatment reaches recycle-water requirement, is all recycled, and realizes the recycling of water resource.Utilize good waste water treatment effect of the present invention, technological process is brief, and required equipment investment is few, takes up an area and saves, without using in additional chemical and medicament, operating cost is low, easily operated control, no waste, waste water are generated, all recycled, be conducive to energy conservation and environmental protection, there is higher economic benefit and environmental benefit.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of expanded graphite wastewater treatment method.
Background technology
Graphite is a kind of nonmetallic ore raw material widely distributed in the world, resourceful.Due to numerous particularity
Can, thus it is widely used in the fields such as metallurgy, machinery, chemical industry, aerospace and nuclear industry.With machining graphite technology not
Disconnected development, the various deep processed products of graphite are continually developed, and graphite becomes increasingly in each industrial department and high-tech area
One of indispensable raw material.Expanded graphite be manufacture soft graphite intermediate products, be by natural flake graphite through chemistry or
Electrochemical intercalation processing is washed, made from dry, high temperature puffing.Graphite after puffing is in vermiform, due to natural scale stone
Ink expands decades of times to hundreds times along crystallite C direction of principal axis, so as to form many small holes with surface inside expanded graphite, makes
Surface area greatly increases, therefore it can be used as good sorbing material.Expanded graphite as native graphite deep processed product it
One, the excellent properties such as high-low temperature resistant, corrosion-resistant, radiation hardness, the good, high heat-conductivity conducting of greasy property with graphite, and due to
Body is gently porous, soft texture, also with good adsorptivity, cohesiveness is good, sound-insulating heat-insulation property is good, good compression resilience and
A series of new excellent properties such as leakproofness, environmental protection, chemical industry catalysis, new energy, space flight, machinery, metallurgy, electric power,
Extensive use in the fields such as biomedicine, composite material, military affairs, atomic energy, petrochemical industry.
With expanded graphite deep processed product, at home and abroad market demand increasingly increases, according to incompletely statistics, state at present
Interior to have thousands of families of graphite deep processing enterprise, thus the production wastewater flow rate of machining graphite enterprise discharge is also being continuously increased.Right
The investigation of each graphite deep processing enterprise is mainly expanded graphite processing.Expansible graphite processing be for purify graphite content,
Often process 1t graphite products in process, sulfuric acid dosage is up to 3t, 100~200kg of potassium permanganate, total water consumption 100t with
On.
The characteristics of expanded graphite production waste water is highly acid, and total suspended matter, metal ion content are high.It is currently used
Processing method is to add alkali neutralization, then adds flocculant flocculation, and rear precipitation separates, then adds chemical substance removal.It although so can be big
The big contamination index reduced in waste water, but operating cost is high, and increasingly strict environmental requirement is not achieved, Treatment of Sludge is bad easily
Cause secondary pollution, let alone the recycling of waste water and its pollutant in water.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of expanded graphite wastewater treatment method, to solve at tradition
It is poor to metal ion and sulfate ion effect to manage expanded graphite waste water, processing cost is high, it is more difficult to reach《Integrated wastewater is arranged
Put standard》Secondary discharge standard the technical issues of.
To achieve the above object, the technical scheme is that a kind of expanded graphite wastewater treatment method, the expansion stone
Black waste water is recycled after primary sedimentation tank, manganese processing recovery pond, calcium sulfate generate pond and pH value regulating reservoir successively.
A kind of expanded graphite wastewater treatment method, comprises the following steps：
(1) recycling of expanded graphite powder：The expanded graphite waste water enters in primary sedimentation tank, by quiet heavy, expansion stone
The expanded graphite powder of black waste water is deposited to pool bottom, and the expanded graphite powder for collecting pool bottom recycles；
(2) recycling of manganese ion：It just sinks that treated through step (1) waste water enters manganese processing recovery pond, add in oxygen
Change type metal capturing agent generates manganese sediment, the manganese sediment of recovery pond bottom after quiet sink；
(3) generation of calcium sulfate：Through step (2) treated waste water enters calcium sulfate generate pond, calcium carbonate is added in, is formed
Calcium sulfate precipitation recycles the calcium sulfate precipitation of bottom after quiet sink；
(4) pH is adjusted：Through step (3), treated that waste water enters pH value regulating reservoir, adds in after step (1) just sinks processing
Waste water carry out PH and adjust to 6.5-8.0 to get to the industrial water of reusable edible.
Preferably, in step (1), the hydraulic detention time when expanded graphite waste water is quiet heavy in primary sedimentation tank is 1-
3h。
Preferably, in step (2), the oxidized form metal capturing agent is calper calcium peroxide, and the manganese sediment is hydration two
Manganese oxide precipitates.
Further, in step (2), the initial reaction amount of the calper calcium peroxide is 1.8-2.2g/L；The quiet heavy time is 0.5-
1.5h；After the completion of reaction, the pH in manganese processing recovery pond is 10-11.
Further, in step (3), the initial reaction amount of the calcium carbonate is 13-15g/L；The quiet heavy time is 0.5-1.5h.
Preferably, in step (4), through step (3) treated waste water and the waste water that just sinks that treated through step (1) according to
100-1000：1 volume ratio mixing carries out pH adjustings.
Preferably, anti-corrosion is equipped in the primary sedimentation tank, manganese processing recovery pond, calcium sulfate generate pond and pH value regulating reservoir to prevent
The liner of acid；Mixed stirring device is additionally provided in the manganese processing recovery pond, calcium sulfate generate pond and pH value regulating reservoir.
With prior art ratio, advantageous effects of the invention：
(1) present invention adds in inorganic agent by substep, is progressively reacted, make the correlation in waste water when handling waste water
Ion is easier to make for reacting and being thoroughly precipitated, and can make the sediment rapid precipitation that generation is reacted in waste water, so as to effectively carry
The treatment effect and organic efficiency of high waste water.
(2) waste water of the invention enters primary sedimentation tank, through quiet after a while heavy, largely expands stone by natural sedimentation method
Ink powder is deposited to pool bottom, periodically collects pond body bottom expansion graphite powder and is recycled, improves productivity effect.
(3 present invention add in oxidized form metal capturing agent in manganese ion recovery processing, generate manganese sediment, by quiet heavy
Afterwards, the manganese metal of regular recovery pond bottom.The processing method can avoid adding in chemical floc, save fund, the dirt of generation
Mud avoids causing secondary pollution, and can recycle metals resources.
(4) present invention selects calper calcium peroxide as metal agent for capturing, can directly and Mn2+Generate the hydration dioxy of brown
Change manganese precipitation MnO (OH)2, and then manganese dioxide industrial products can be produced.
(5) present invention adds in cheap powdered lime stone in the waste water after being recycled through manganese, the Ca in water2+Reaction generation
White tiny solid CaSO hard to tolerate in water under room temperature4Precipitation, to remove SO in waste water so as to reach4 2-Purpose, and CaSO4It is heavy
It forms sediment by after natural subsidence, being accumulated in bottom of pond, the CaSO of regular recovery pond bottom4Precipitation can be used as gypsum and calcium sulfate brilliant
The raw material of palpus.
(6) present invention will finally introduce in pH value regulating reservoir through waste water, acid waste water after the processing of introducing portion primary sedimentation tank, right
Its pH value is adjusted, and pH adjusts the pH value to expanded graphite industrial water, can save great lot of water resources, and introduce acid
Property waste water adjusting can save a large amount of strong acid, save production cost.
(7) all pond bodies used in the present invention are equipped with liner, and liner is anti-corrosion, the material of acid-proof, is avoided in sewage
In processing procedure, since acid or corrosive goods confrontation pond body is corroded, extend the service life of equipment, reduce production and fortune
Row cost.
(8) manganese of the invention processing recovery pond, calcium sulfate generate pond, pH value regulating reservoir have mixed stirring device, improve
Reaction efficiency is respectively provided with certain hydraulic detention time, is conducive to improve waste water treatment efficiency and resource reclaim.
Summary, investment of the invention and construction cost are low, and operating cost is low, and processing cost is low, easily operated control,
Human resources are saved, wastewater treatment speed is fast, good purification.Using the present invention method can by all substances in waste water into
Row recycles, and does not generate excess sludge, does not generate secondary pollution, realizes wastewater zero discharge, is handled using the method for the present invention
Sewage afterwards meets integrated wastewater discharge standard primary standard, and can be recycled, and method of the invention is especially suitable for
The medium-sized and small enterprises participated in market competition use.
Description of the drawings
Fig. 1 is the flow diagram of the present invention.
Specific embodiment
The invention discloses a kind of expanded graphite wastewater treatment, reuse and substance recovery system and its application method, the party
Most after treatment, all resources carry out recycling to expanded graphite waste water to method in waste water, not only solve expansion stone at last
The problem of black production wastewater treatment, and resource has been saved, create profit for enterprise.
As shown in Figure 1, a kind of expanded graphite wastewater treatment method, comprises the following steps：
(1) recycling of expanded graphite powder：The expanded graphite waste water enters in primary sedimentation tank, quiet through after a while
Heavy, hydraulic detention time 1-3h, most of expanded graphite powder of expanded graphite waste water is deposited to pond body by natural sedimentation method
Bottom, the expanded graphite powder for collecting pool bottom recycle, and the daily set time collects.
(2) recycling of manganese ion：It just sinks that treated through step (1) waste water enters manganese processing recovery pond, add in oxygen
Change type metal capturing agent-calper calcium peroxide, initial reaction amount are 1.8-2.2g/L, generate the hydration two of manganese sediment, i.e. brown
Manganese oxide precipitates, by 0.5-1.5h it is quiet it is heavy after, the hydrated manganese dioxide of daily timing recovery pond bottom, waste water is by original at this time
The acidity come becomes alkaline waste water, pH value 10-11.This recovery method can save fund to avoid chemical floc is added in,
The sludge of generation avoids causing secondary pollution, and can recycle metals resources.
(3) generation of calcium sulfate：Through step (2), treated that waste water enters that calcium sulfate generate pond adds in cheap powdered lime
Stone (calcium carbonate) makes its initial reaction amount for 13-15g/L, reaction generation calcium sulfate precipitation, by 0.5-1.5h it is quiet it is heavy after, every
The CaSO of regular recovery pond bottom when 6-12 is small4Precipitation.
(4) pH is adjusted：Through step (3), treated that waste water enters pH value regulating reservoir, according to 100-1000：1 volume ratio
It adds in and just sinks treated waste water through step (1) and carry out PH and adjust to 6.5-8.0, using processed waste water as industrial water cycle
It utilizes.
The present invention will be further described in detail with reference to the specific embodiments.
Embodiment 1
A kind of expanded graphite wastewater treatment method, comprises the following steps：
(1) expanded graphite waste water enters primary sedimentation tank, and through quiet after a while heavy, hydraulic detention time 1h passes through nature
Precipitation method major part expanded graphite powder is deposited to pool bottom, and the daily set time collects pond body bottom expansion graphite powder recycling profit
With the expanded graphite powder rate of recovery can reach 98.6%.
(2) the processed waste water of step (1) is sent into manganese processing recovery pond, adds in calper calcium peroxide 1.8g/L, generated manganese and sink
The hydrated manganese dioxide precipitation of starch, i.e. brown, by 0.5h it is quiet it is heavy after, the hydration titanium dioxide of daily timing recovery pond bottom
Manganese, metal manganese recovery ratio reach 94.5%, and waste water becomes alkaline waste water, pH value 10 from original acidity at this time.
(3) the processed waste water of step (2) is sent into calcium sulfate generate pond, adds in calcium carbonate 13g/L, form CaSO4It is heavy
Form sediment, by 0.5h it is quiet it is heavy after, the CaSO of regular recovery pond bottom when 12 is small4Precipitation, CaSO4The rate of recovery reaches 90.1%.
(4) the processed waste water of step (3) is sent into pH value regulating reservoir, part acid waste water and pH after primary sedimentation tank is handled
It is worth the mixing of regulating reservoir waste water, pH value is adjusted, mixed proportion presses 100：1, pH is adjusted to 6.9, and processed waste water is whole
It recycles.
Embodiment 2
A kind of expanded graphite wastewater treatment method, comprises the following steps：
(1) expanded graphite waste water enters primary sedimentation tank, and through quiet after a while heavy, hydraulic detention time 2h passes through nature
Precipitation method major part expanded graphite powder is deposited to pool bottom, and the daily set time collects pond body bottom expansion graphite powder recycling profit
With the expanded graphite powder rate of recovery can reach 99.1%.
(2) the processed waste water of step (1) is sent into manganese processing recovery pond, adds in calper calcium peroxide 2.0g/L, generated manganese and sink
The hydrated manganese dioxide of starch, i.e. brown, by 1h it is quiet it is heavy after, the hydrated manganese dioxide of daily timing recovery pond bottom, gold
Belong to manganese recovery ratio and reach 96.3%, waste water becomes alkaline waste water, pH value 10.5 from original acidity at this time.
(3) the processed waste water of step (2) is sent into calcium sulfate generate pond, adds in calcium carbonate 14g/L, form CaSO4It is heavy
Form sediment, by 1h it is quiet it is heavy after, the CaSO of regular recovery pond bottom when 8 is small4Precipitation, CaSO4The rate of recovery reaches 92.7%.
(4) the processed waste water of step (3) is sent into pH value regulating reservoir, part acid waste water and pH after primary sedimentation tank is handled
It is worth the mixing of regulating reservoir waste water, pH value is adjusted, mixed proportion presses 500：1, pH is adjusted to 7.6, and processed waste water is whole
It recycles.
Embodiment 3
A kind of expanded graphite wastewater treatment method, comprises the following steps：
(1) expanded graphite waste water enters primary sedimentation tank, and through quiet after a while heavy, hydraulic detention time 3h passes through nature
Precipitation method major part expanded graphite powder is deposited to pool bottom, and the daily set time collects pond body bottom expansion graphite powder recycling profit
With the expanded graphite powder rate of recovery can reach 99.7%.
(2) the processed waste water of step (1) is sent into manganese processing recovery pond, adds in calper calcium peroxide 2.2g/L, generated manganese and sink
The hydrated manganese dioxide of starch, i.e. brown, by 1.5h it is quiet it is heavy after, the hydrated manganese dioxide of daily timing recovery pond bottom,
Metal manganese recovery ratio reaches 97.8%, and waste water becomes alkaline waste water, pH value 10.9 from original acidity at this time.
(3) the processed waste water of step (2) is sent into calcium sulfate generate pond, adds in calcium carbonate 15g/L, form CaSO4It is heavy
Form sediment, by 1.5h it is quiet it is heavy after, the CaSO of regular recovery pond bottom when 6 is small4Precipitation, CaSO4The rate of recovery reaches 93.4%.
(4) the processed waste water of step (3) is sent into pH value regulating reservoir, part acid waste water and pH after primary sedimentation tank is handled
It is worth the mixing of regulating reservoir waste water, pH value is adjusted, mixed proportion presses 1000：1, pH is adjusted to 8.0, and processed waste water is whole
It recycles
The processing method of the present invention has the advantages of processing speed is fast, and clean-up effect is stablized.It is purified through embodiment 1-3
Waste water quality reaches National Standard of the People's Republic of China's《Integrated wastewater discharge standard (GB 8978-1996)》Middle regulation one
Grade Effluent criteria can be used as industrial cycle water in factory.Operational administrative of the present invention is easy, easily controllable, labor strength
Small, automatic control level is high, largely saves human resources.The present invention can be by the various pollutants in waste water by centainly reacting change
It into industrial products, is generated without any polluter, no excess sludge generates, and will not cause the secondary pollution of environment, be entirely capable of
Enough byproducts for accomplishing to handle waste water and industry water reuse are, it can be achieved that " zero-emission " of real meaning.
Pass through preliminary cost accounting to the expanded graphite wastewater treatment method of embodiment 1-3, one ton of expanded graphite of processing gives up
Water operation cost is mainly that the electricity charge and a part add reagent expense, if the expansion by 400 cubic metres of waste water of daily production
Machining graphite enterprise calculation.
1st, per ton cost operating cost is handled：
(1) electricity charge (A1) Sewage Disposal day operation power consumption about 150kW h, the electricity charge take 1.0 yuan/(kWh).
The ÷ 400=0.375 member/(m of A1=150 × 1.03Water)
(2) labour cost (A2) Sewage Disposal is responsible for by 1 people is full-time, 1600 yuan of monthly earnings.
30 ÷ 400=0.133 member/(m of A2=1600 ÷3Water)
(3) dosage of medicament expense (A3) lime stone is average in 14kg/m3Left and right, the price of lime stone is 0.05 yuan/kg,
Therefore, the expense of feeding lime mountain flour is 0.7 yuan/(m3Water)；The dosage of agent for capturing calper calcium peroxide is average in 2kg/m3It is left
The right side, the price of calper calcium peroxide is 3 yuan/kg, therefore the expense for adding aluminium polychloride is 6.0 yuan/(m3Water).
A3=6.0+0.7=6.7 member/(m3Water)
(4) ton water running cost (A4)
A4=A1+A2+A3=0.375+0.133+6.7=7.208 member/(m3Water).(being free of depreciation cost)
2nd, waste water and waste water product generate expense for enterprise：
(1) cycling utilization of wastewater
Industry water is per ton to press 3 yuan/(m3Water) calculation of price；
(2) manganese dioxide powder
Hydrated manganese dioxide precipitation MnO (OH)2Manganese dioxide powder can be changed into, 0.079kg/m can be generated3, manganese dioxide
Price is 10 yuan/kg, therefore the expense that waste water per ton generates is 0.79 yuan/(m3Water)；
(3) calcium sulfate
Every cubic metre of waste water can generate calcium sulfate 12.89kg/m3, the price of calcium sulfate is 1 yuan/kg, therefore waste water per ton
The expense of generation is 12.89 yuan/(m3Water)；
(4) expanded graphite
The recyclable expanded graphite 1.0kg/m of every cubic metre of waste water3, the price of calcium sulfate is 6 yuan/kg, therefore waste water per ton
The expanded graphite expense of recycling is 6 yuan/(m3Water)；
(5) since enterprise is zero discharge waste-water, enterprise saves about 1 yuan/(m of charges for disposing pollutants3Water)；
Therefore, ton waste water is the expense that enterprise generates：
(1)+(2)+(3)+(4)+(5)=23.68 yuan/(m3Water)
In summary can calculate, it is that the net profit that enterprise generates is 23.68- that enterprise, which often handles one cubic metre of waste water,
7.208=16.472 it is first, daily 6588.8 yuan of profits are created for enterprise.
Therefore, present invention primary water after the processing of pH value regulating reservoir, as production expanded graphite industrial water Xun Huan profit
With, be truly realized outside zero and arrange, substance all recycles in raw wastewater, is generated without pollutant, no waste residue and liquid, generate have it is a large amount of
The waste water byproduct of economic value, byproduct and industrial circulating water create value and are more than processing waste water cost, make at waste water
Reason is being not the instrument of " spending " and " earning money ", while avoids plurality of heavy metal and highly acid substance enters environment, changes
Ecology around being apt to.This method has notable economy, environment and social benefit.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention belong to the scope of protection of present invention.
Claims (8)
1. a kind of expanded graphite wastewater treatment method, it is characterised in that：The expanded graphite waste water is successively by primary sedimentation tank, at manganese
It is recycled after reason recovery pond, calcium sulfate generate pond and pH value regulating reservoir.
2. expanded graphite wastewater treatment method according to claim 1, which is characterized in that comprise the following steps：
(1) recycling of expanded graphite powder：The expanded graphite waste water enters in primary sedimentation tank, and by quiet heavy, expanded graphite gives up
The expanded graphite powder of water is deposited to pool bottom, and the expanded graphite powder for collecting pool bottom recycles；
(2) recycling of manganese ion：It just sinks that treated through step (1) waste water enters manganese processing recovery pond, add in oxidized form
Metal capturing agent generates manganese sediment, the manganese sediment of recovery pond bottom after quiet sink；
(3) generation of calcium sulfate：Through step (2) treated waste water enters calcium sulfate generate pond, calcium carbonate is added in, forms sulfuric acid
Calcium precipitate recycles the calcium sulfate precipitation of bottom after quiet sink；
(4) pH is adjusted：Through step (3), treated that waste water enters pH value regulating reservoir, adds in that just to sink that treated through step (1) useless
Water carries out pH and adjusts to 6.5-8.0 to get to the industrial water of reusable edible.
3. expanded graphite wastewater treatment method according to claim 2, it is characterised in that：In step (1), the expansion stone
Hydraulic detention time when black waste water is quiet heavy in primary sedimentation tank is 1-3h.
4. expanded graphite wastewater treatment method according to claim 2, it is characterised in that：In step (2), the oxidized form
Metal capturing agent is calper calcium peroxide, and the manganese sediment precipitates for hydrated manganese dioxide.
5. expanded graphite wastewater treatment method according to claim 4, it is characterised in that：In step (2), the peroxidating
The initial reaction amount of calcium is 1.8-2.2g/L；The quiet heavy time is 0.5-1.5h；After the completion of reaction, the pH in manganese processing recovery pond is
10-11。
6. expanded graphite wastewater treatment method according to claim 2, it is characterised in that：In step (3), the calcium carbonate
Initial reaction amount be 13-15g/L；The quiet heavy time is 0.5-1.5h.
7. expanded graphite wastewater treatment method according to claim 2, it is characterised in that：In step (4), through step (3)
Treated waste water is with the waste water that just sinks that treated through step (1) according to 100-1000：1 volume ratio mixing carries out pH adjustings.
8. according to claim 1-7 any one of them expanded graphite wastewater treatment methods, it is characterised in that：The primary sedimentation tank,
The liner of anti-corrosion acid-proof is equipped in manganese processing recovery pond, calcium sulfate generate pond and pH value regulating reservoir；The manganese processing recovery pond,
Mixed stirring device is additionally provided in calcium sulfate generate pond and pH value regulating reservoir.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502710A (en) * | 2002-11-26 | 2004-06-09 | 中南大学 | Deep purification method of manganese sulfate solution |
| CN104773760A (en) * | 2015-04-14 | 2015-07-15 | 湖南有色金属研究院 | Preparation method and applications of nano-manganese oxide |
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| CN104773760A (en) * | 2015-04-14 | 2015-07-15 | 湖南有色金属研究院 | Preparation method and applications of nano-manganese oxide |
| CN106396227A (en) * | 2016-09-08 | 2017-02-15 | 哈尔滨理工大学 | Recycling method for waste acid generated during preparation of graphite oxide through liquid-phase chemical method |
| CN106517588A (en) * | 2016-11-30 | 2017-03-22 | 济宁璟华环保科技有限公司 | Efficient treatment method for wastewater of graphene production process |
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