CN112551755A - Expandable graphite production wastewater treatment system and treatment method - Google Patents
Expandable graphite production wastewater treatment system and treatment method Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000010439 graphite Substances 0.000 title claims abstract description 42
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 42
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 78
- 239000002351 wastewater Substances 0.000 claims abstract description 60
- 239000010802 sludge Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000004062 sedimentation Methods 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims abstract description 8
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- 235000003891 ferrous sulphate Nutrition 0.000 claims description 9
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 9
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 239000011651 chromium Substances 0.000 claims description 5
- -1 fluoride ions Chemical class 0.000 claims description 5
- 150000002500 ions Chemical class 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 4
- 229910052925 anhydrite Inorganic materials 0.000 claims description 4
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 4
- 229910001430 chromium ion Inorganic materials 0.000 claims description 4
- 239000000706 filtrate Substances 0.000 claims description 4
- 229910001385 heavy metal Inorganic materials 0.000 claims description 4
- 239000008235 industrial water Substances 0.000 claims description 4
- FLTRNWIFKITPIO-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe] FLTRNWIFKITPIO-UHFFFAOYSA-N 0.000 claims description 4
- 239000007800 oxidant agent Substances 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims description 3
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Images
Classifications
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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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
-
- 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
-
- 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
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
Abstract
An expandable graphite production wastewater treatment system and a treatment method. The invention comprises the following components: the production wastewater is uniformly conveyed to the regulating tank to realize uniform and homogeneous treatment, and the upper part of the regulating tank is connected with the accident tank; the primary reaction tank is connected with the lower part of the regulating tank; the flow state reaction tank is connected with the first-stage reaction tank; and adding a flocculating agent into the sedimentation tank to precipitate and separate out a plurality of compound sediments, sending the generated sludge into a sludge tank, recycling the effluent, dehydrating the sludge at the lower part by a concentration filter press and then transporting the sludge to the outside, and conveying the dehydrated water generated by the filter press to the regulating tank. The pH value of the expandable graphite production circulating water treated by the invention is 6-9, SS is less than 10mg/L, and CrO6+Less than 0.5mg/L,fluoride is less than 20mg/L, the wastewater meets the requirement of production water after treatment, all the wastewater can be recycled, and the method is beneficial to energy conservation and environmental protection and has higher economic benefit and environmental benefit.
Description
The technical field is as follows:
the invention relates to the technical field of graphite wastewater treatment, in particular to a system and a method for treating expandable graphite production wastewater.
Background art:
with the rapid development of new energy vehicles, energy storage, environmental protection, new materials and other strategic emerging industries, the processing technology of material-grade graphite products including high-purity graphite, spherical graphite, expandable graphite, flexible graphite and the like is continuously broken through, but a large amount of waste water, waste gas and the like are still generated in the processing and production process of the graphite products. Taking the expandable graphite as an example, the preparation process comprises the conventional chemical oxidation method, the electrochemical method, the microwave method, the gas phase diffusion method and the like, but the mature chemical oxidation method with large wastewater and waste gas discharge and low production cost is mainly used in the current industrial production, the chemical oxidation method production process of the expandable graphite generally comprises the processes of oxidation, intercalation, washing, dehydration, drying and the like, the wastewater mainly comes from the washing and dehydration processes, and a large amount of (the water consumption of the washing process is about 25 times of the treatment capacity of the intercalation graphite) heavy metal ions (Cr) are contained6+、Mn7+) Acid radical ion (SO)4 2-、F-、NO3 -、ClO4 -) The direct discharge of the acidic wastewater will certainly cause great damage to the surrounding ecological environment and also obviously improve the water consumption of enterprises.
Most of the existing expandable graphite wastewater treatment processes are performed by directly discharging after oxidation, neutralization and precipitation, and the treatment mode has advantages in the aspect of reducing pollution indexes, but the chemical dosage is complex in type and large in dosage, the particle settling speed is low, the sludge production is large, the occupied area of a water treatment workshop is large, the product quality is influenced by the reuse of the treated high-concentration saline backwater, and the treatment mode is not suitable for water resource recycling.
The invention content is as follows:
the invention aims to provide a treatment system and a treatment method for expandable graphite production wastewater, which can simply, quickly and effectively remove harmful components in the production wastewater and realize the recycling of the production water.
The above purpose is realized by the following technical scheme:
an expandable graphite production wastewater treatment system, comprising:
the production wastewater is uniformly conveyed to the regulating tank to realize uniform and homogeneous treatment, and the upper part of the regulating tank is connected with the accident tank;
the primary reaction tank is connected with the lower part of the regulating tank;
the flow state reaction tank is connected with the first-stage reaction tank;
and the sedimentation tank is added with a flocculating agent to precipitate and separate out a plurality of compound precipitates, the generated sludge is sent into the sludge tank, the effluent is recycled, the sludge at the lower part is dewatered by a concentration filter press and then transported out, and the dewatering water generated by the filter press is conveyed to the regulating tank.
The graphite production wastewater treatment system is characterized in that a stirrer and a pH meter are respectively arranged in the adjusting tank, the primary reaction tank and the flow state reaction tank.
Graphite waste water processing system, the ultrasonic wave board that shakes has been arranged to the sedimentation tank top, the cotton felt of pitch has been laid to the sedimentation tank bottom.
The graphite production wastewater treatment system is characterized in that the sludge tank is provided with a mud scraper and a filter press.
The graphite production wastewater treatment system is characterized in that a stirring device and an aeration device are arranged in the regulating tank.
A wastewater treatment method using the expandable graphite production wastewater treatment system according to any one of claims 1 to 5, comprising the steps of:
(1) uniformly conveying the production wastewater to an adjusting tank for uniform and homogeneous treatment;
(2) conveying the wastewater treated in the step (1) to a primary reaction tank, adding a ferrous sulfate oxidant, and reducing the chromium ions from +6 to +3 under an acidic condition;
(3) conveying the wastewater treated in the step (2) to a fluidized reaction tank, adding lime, adjusting the pH to 7-9, and generating Cr (OH) under an alkaline condition3、Fe(OH)3、CaSO4、CaF2A precipitable compound of (a);
(4) conveying the wastewater treated in the step (3) to a sedimentation tank, adding polyaluminium chloride and a polyacrylamide flocculant, wherein the effluent at the upper part of the sedimentation tank is recyclable industrial water, and the sludge at the lower part of the sedimentation tank enters the next step;
(5) and (4) sending the sludge generated in the step (4) into a sludge pool, carrying out outward after treatment by a filter press, and returning the filtrate to the step (1).
In the wastewater treatment method of the expandable graphite production wastewater treatment system, in the step (1), the upper part of the regulating tank is connected with the accident tank, and wastewater can overflow and automatically enter the accident tank; and a water outlet is formed in the lower part of the regulating tank, and wastewater is conveyed into the primary reaction tank through a wastewater lifting pump.
In the wastewater treatment method of the graphite production wastewater treatment system, in the step (2), the primary reaction tank comprises 3 deep-barrel flat-bottom reaction tanks, each of the 3 deep-barrel flat-bottom reaction tanks comprises a first reaction tank, an intermediate tank and a tail-end tank, wastewater flows in from the upper part of the first reaction tank, overflows from the upper part of the first reaction tank and enters the intermediate tank, the intermediate tank overflows into the tail-end tank and flows out from the upper part of the tail-end tank, the wastewater flows automatically among the 3 deep-barrel flat-bottom reaction tanks by means of liquid level difference, a chemical inlet pipeline is arranged on a water inlet pipe of each deep-barrel flat-bottom reaction tank, and chemicals are added in batches.
According to the wastewater treatment method of the graphite production wastewater treatment system, in the step (3), the flow state reaction tank comprises 3 deep-barrel flat-bottom reaction tanks, each of the 3 deep-barrel flat-bottom reaction tanks comprises a first reaction tank, a middle tank and a tail end tank, wastewater flows in from the upper part of the first reaction tank, flows out from the lower part of the first reaction tank and enters the middle tank, the upper part of the middle tank overflows into the tail end tank and overflows out from the upper part of the tail end tank, self-flow is realized by means of pressure difference, and chemical inlet pipelines are installed on water inlet pipes of the first reaction tank and the tail end tanks and used for adding chemicals in batches.
According to the wastewater treatment method of the graphite production wastewater treatment system, in the step (2), a reagent is added into the primary reaction tank, and the ferrous sulfate removes toxic heavy metal ions; and (3) adding lime into the flow state reaction tank to remove sulfate radicals and fluoride ions.
The invention has the beneficial effects that:
when the invention is used for treating wastewater, the reagents are added into the wastewater in batches and in different tanks gradually to react, so that harmful ions are easier and more sufficient to react; the ultrasonic vibration plate is arranged above the sedimentation tank, so that suspended particles after flocculation are easier to sink, the sedimentation efficiency is improved, the use amount of a flocculating agent is reduced, and the area of a plant area is saved. Has the advantages of low investment, low operating cost, good treatment effect and simple and convenient operation and management.
The pH value of the expandable graphite production circulating water treated by the invention is 6-9, the concentration SS of suspended solid is less than 10mg/L, and CrO6+Less than 0.5mg/L and fluoride less than 20mg/L, the wastewater can meet the requirement of production water after treatment, can be recycled, is beneficial to energy conservation and environmental protection, has higher economic benefit and environmental benefit, and has the advantages of small investment, low operating cost, good treatment effect and simple and convenient operation and management.
Description of the drawings:
FIG. 1 is a process flow diagram of the present invention.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1:
the invention provides an expandable graphite production wastewater treatment system, which comprises: the system comprises an adjusting tank 1, wherein production wastewater is uniformly conveyed to the adjusting tank to realize uniform and homogeneous treatment, and the upper part of the adjusting tank 1 is connected with an accident tank 5; the primary reaction tank 2 is added with ferrous sulfate to remove toxic heavy metal ions, and the primary reaction tank 2 is connected with the lower part of the regulating tank; a flow state reaction tank 3, which is added with lime to remove sulfate radicals and fluorine ions, and the flow state reaction tank 3 is connected with the first-stage reaction tank 2; and (4) adding a flocculating agent into the sedimentation tank 4 to precipitate and separate out various compound sediments, sending the generated sludge into a sludge tank 6, recycling the effluent, and transporting the lower sludge after concentration, filter pressing and dehydration.
The method for treating the wastewater by adopting the expandable graphite production wastewater treatment system comprises the following steps:
(1) and uniformly conveying the production wastewater to an adjusting tank for uniform and homogenized treatment.
(2) And (2) conveying the wastewater treated in the step (1) to a primary reaction tank, adding a ferrous sulfate oxidant, and reducing the chromium ions from +6 to +3 under an acidic condition.
(3) Conveying the wastewater treated in the step (2) to a fluidized reaction tank, adding lime, adjusting the pH to 7-9, and generating Cr (OH) under an alkaline condition3、Fe(OH)3、CaSO4、CaF2And the like, can precipitate the compound.
(4) And (4) conveying the wastewater treated in the step (3) to a sedimentation tank, adding polyaluminium chloride and a polyacrylamide flocculant, and obtaining recyclable industrial water as effluent from the upper part of the sedimentation tank. And the sludge at the lower part of the sedimentation tank enters the next step.
(5) And (4) sending the sludge generated in the step (4) into a sludge pool, treating the sludge by a filter press, transporting the sludge out, and returning the filtrate to the step (1).
In the step (1), the upper part of the regulating tank is connected with an accident tank, and wastewater can overflow and automatically enter the accident tank; the lower part of the regulating tank is provided with a water outlet, and wastewater is conveyed into the primary reaction tank through a wastewater lifting pump;
in the step (1), a stirring device and an aeration device are arranged in the regulating tank, the pH value of the wastewater in the tank is less than or equal to 3, and the uniform amount and homogeneity of the treated water are ensured.
And (3) enabling the primary reaction tank in the step (2) to comprise 3 deep-barrel flat-bottom reaction tanks, enabling wastewater to flow in from the upper part of the first reaction tank, enabling the wastewater to overflow into the middle tank, enabling the wastewater to overflow into the tail end tank, enabling the wastewater to flow out from the upper part of the tail end tank, realizing self-flow among the three reaction tanks by means of liquid level difference, and enabling a medicine inlet pipeline to be installed on a water inlet pipe of each reaction tank to feed medicine in batches.
The medicament used in the step (2) is ferrous sulfate.
And (3) enabling the flow reaction tank to comprise 3 deep-barrel flat-bottom reaction tanks, enabling wastewater to flow in from the upper part of the first reaction tank, enabling wastewater to flow out from the lower part of the first reaction tank to enter the middle tank, enabling the upper part of the middle tank to overflow into the tail end tank, enabling the wastewater to overflow out from the upper part of the tail end tank, realizing self-flow by means of pressure difference, and enabling the water inlet pipes of the first reaction tank and the tail end reaction tank to be provided with a medicine inlet.
The medicament used in the step (3) is lime.
The pH value of the first reaction tank is more than 7 in the step (3), and the pH value of the tail end tank is more than 8.
And (4) arranging an ultrasonic vibration plate above the sedimentation tank, and paving an asphalt cotton felt at the bottom of the sedimentation tank.
A stirrer and a pH meter are arranged in the adjusting tank, the primary reaction tank and the flow state reaction tank.
And (5) arranging a mud scraper and a filter press in the sludge tank, and conveying the dewatered water of the filter press to the regulating tank.
Example 2:
the method for wastewater treatment by the expandable graphite production wastewater treatment system in the embodiment 1 comprises the following steps:
(1) uniformly conveying the production wastewater to an adjusting tank for uniform and homogenized treatment, wherein the retention time is about 7 hours, the pH of the wastewater is 0.5, and the amount of the wastewater is 62.5m3/h。
(2) And (2) conveying the wastewater treated in the step (1) to a first-stage reaction tank, adding a ferrous sulfate oxidant with the dosage of 21g/L, reducing the chromium ions from the +6 valence to the +3 valence under the condition that the pH value is 0.8, and allowing the wastewater to pass for about 19 hours.
(3) A flow-state reaction tank, wherein the wastewater treated in the step (2) is conveyed to the flow-state reaction tank, lime is added, the dosage is 10g/L, the pH is adjusted to 7.5, and Cr (OH) is generated under the alkaline condition3、Fe(OH)3、CaSO4、CaF2Etc. can precipitate the compound, with a passage time of about 6 h.
(4) And (4) conveying the wastewater treated in the step (3) to a sedimentation tank, adding polyaluminium chloride and a polyacrylamide flocculant, wherein the ultrasonic vibration plate frequency at the upper part of the sedimentation tank is 35Hz, the effluent is recyclable industrial water, and the recycled water amount is 40.6m3H is used as the reference value. Sludge at the lower part of the sedimentation tank enters the next stepAnd (5) carrying out the following steps.
(5) And (4) sending the sludge generated in the step (4) into a sludge tank, treating the sludge by a filter press, transporting the sludge out, and returning the filtrate to the step (1).
The expandable graphite production wastewater is treated by the system, the pH of the final return water is 7.3, the concentration SS of suspended solids is 8mg/L, the concentration of fluoride is 19.5mg/L, and CrO6+The water quality requirement of the production water is met, and about 65 percent of the production water in the plant area can be recycled.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An expandable graphite production wastewater treatment system, comprising:
the system comprises an adjusting tank (1), wherein production wastewater is uniformly conveyed to the adjusting tank to realize uniform and homogeneous treatment, and the upper part of the adjusting tank (1) is connected with an accident tank (5);
the primary reaction tank (2), the primary reaction tank (2) is connected with the lower part of the regulating tank (1);
a flow state reaction tank (3) connected with the primary reaction tank (2);
the device comprises a sedimentation tank (4), a flocculating agent is added into the sedimentation tank (4) to precipitate and separate out a plurality of compound sediments, the generated sludge is sent into a sludge tank (6), the effluent is recycled, the sludge at the lower part is transported outside after being dewatered by a concentration filter press, and the dewatering water generated by the filter press is conveyed to the regulating tank (1).
2. The graphite production wastewater treatment system according to claim 1, wherein a stirrer and a pH meter are respectively installed in the adjusting tank (1), the primary reaction tank (2) and the flow state reaction tank (3).
3. The graphite production wastewater treatment system according to claim 2, wherein an ultrasonic vibrating plate is arranged above the sedimentation tank (4), and an asphalt cotton felt is paved at the bottom of the sedimentation tank (4).
4. The graphite production wastewater treatment system according to claim 2, wherein the sludge tank (6) is provided with a mud scraper and a filter press.
5. The graphite production wastewater treatment system according to claim 1, wherein the adjusting tank (1) is internally provided with a stirring device and an aeration device.
6. A wastewater treatment method using the expandable graphite production wastewater treatment system according to any one of claims 1 to 5, characterized by comprising the steps of:
(1) uniformly conveying the production wastewater to an adjusting tank (1) for uniform and homogenized treatment;
(2) conveying the wastewater treated in the step (1) to a primary reaction tank (2), adding a ferrous sulfate oxidant, and reducing the chromium ions from +6 to +3 under an acidic condition;
(3) conveying the wastewater treated in the step (2) to a fluidized reaction tank (3), adding lime, adjusting the pH to 7-9, and generating Cr (OH) under an alkaline condition3、Fe(OH)3、CaSO4、CaF2A precipitable compound of (a);
(4) conveying the wastewater treated in the step (3) to a sedimentation tank (4), adding polyaluminium chloride and a polyacrylamide flocculant, wherein the effluent at the upper part of the sedimentation tank is recyclable industrial water, and the sludge at the lower part of the sedimentation tank enters the next step;
(5) and (4) sending the sludge generated in the step (4) into a sludge pool (6), carrying out outward after treatment by a filter press, and returning the filtrate to the step (1).
7. The wastewater treatment method of the wastewater treatment system for the expandable graphite production according to claim 6, wherein in the step (1), the upper part of the adjusting tank (1) is connected with an accident tank (5), and wastewater can overflow and automatically enter the accident tank; and a water outlet is formed in the lower part of the regulating tank, and wastewater is conveyed into the primary reaction tank through a wastewater lifting pump.
8. The wastewater treatment method of the graphite production wastewater treatment system according to claim 7, wherein in the step (2), the primary reaction tank (2) comprises 3 deep-barrel flat-bottom reaction tanks, the 3 deep-barrel flat-bottom reaction tanks comprise a first reaction tank, a middle tank and a terminal tank, wastewater flows in from the upper part of the first reaction tank, overflows into the middle tank, overflows into the terminal tank, flows out from the upper part of the terminal tank, and realizes self-flow among the 3 deep-barrel flat-bottom reaction tanks by means of a liquid level difference, and a chemical feeding pipeline is installed on a water inlet pipe of each deep-barrel flat-bottom reaction tank to feed chemicals in batches.
9. The wastewater treatment method of a graphite production wastewater treatment system according to claim 7, wherein the fluidized reaction tank (3) in the step (3) comprises 3 deep barrel flat bottom reaction tanks, the 3 deep barrel flat bottom reaction tanks comprise a first reaction tank, a middle tank and a terminal tank, wastewater flows in from the upper part of the first reaction tank, flows out from the lower part of the first reaction tank into the middle tank, overflows from the upper part of the middle tank into the terminal tank, overflows from the upper part of the terminal tank, and flows automatically by means of pressure difference, and the inlet pipes of the first reaction tank and the terminal tank are provided with inlet pipes for batch dosing.
10. The wastewater treatment method of the graphite production wastewater treatment system according to claim 8 or 9, wherein in the step (2), the agent added into the primary reaction tank (2) is ferrous sulfate, and the ferrous sulfate removes toxic heavy metal ions; and (3) adding lime into the flow state reaction tank (3) to remove sulfate radicals and fluoride ions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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Citations (3)
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| WO2017111406A1 (en) * | 2015-12-22 | 2017-06-29 | 최성필 | Apparatus for treating sewer overflow at high speed by using eco-friendly particulate foam artificial float fillers having resource recyclability |
| CN109534558A (en) * | 2018-12-27 | 2019-03-29 | 上海班德环保科技股份有限公司 | Sodium dichromate method produces expansible graphite acid waste water processing equipment and technique |
| CN210480942U (en) * | 2019-07-15 | 2020-05-08 | 浙江翔和环保工程有限公司 | Continuous electroflocculation water treatment device for feeding medicine along flow path |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017111406A1 (en) * | 2015-12-22 | 2017-06-29 | 최성필 | Apparatus for treating sewer overflow at high speed by using eco-friendly particulate foam artificial float fillers having resource recyclability |
| CN109534558A (en) * | 2018-12-27 | 2019-03-29 | 上海班德环保科技股份有限公司 | Sodium dichromate method produces expansible graphite acid waste water processing equipment and technique |
| CN210480942U (en) * | 2019-07-15 | 2020-05-08 | 浙江翔和环保工程有限公司 | Continuous electroflocculation water treatment device for feeding medicine along flow path |
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| 韦春霞主编, 科技学术文献出版社 * |
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