CN112824336A - Underground production wastewater treatment and recycling system - Google Patents
Underground production wastewater treatment and recycling system Download PDFInfo
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- CN112824336A CN112824336A CN201911140633.1A CN201911140633A CN112824336A CN 112824336 A CN112824336 A CN 112824336A CN 201911140633 A CN201911140633 A CN 201911140633A CN 112824336 A CN112824336 A CN 112824336A
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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
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular 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
- C02F1/66—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
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
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Abstract
The invention relates to a system for treating and recycling underground production wastewater, belonging to the technical field of wastewater treatment. According to the system for treating and recycling the underground production wastewater, the wastewater storage tank is sequentially connected with the jet flow flotation machine, the grating, the aeration tank, the comprehensive adjusting tank, the coagulating sedimentation tank, the pH adjusting tank, the EGSB anaerobic reactor, the inclined plate sedimentation tank, the ozone sterilization tank and the reverse osmosis treatment tank; the pipeline connecting the EGSB anaerobic reactor and the inclined plate sedimentation tank is also connected with the top of the EGSB anaerobic reactor; the EGSB anaerobic reactor is also sequentially connected with a gas storage tank and a biogas generator; the aeration tank, the coagulating sedimentation tank, the EGSB anaerobic reactor, the inclined plate sedimentation tank and the ozone sterilization tank are all connected with the sludge concentration tank. The invention has simple structure, realizes the standard discharge of the mine wastewater, realizes the recycling of the mine wastewater, reduces the production cost, and is energy-saving and environment-friendly.
Description
Technical Field
The invention relates to a system for treating and recycling underground production wastewater, belonging to the technical field of wastewater treatment.
Background
During the mining process of a mine, a large amount of mine wastewater is generated and discharged, and the mine wastewater mainly comprises natural underground water discharged for safe production from underground water seeping to a roadway during the mining process and coal-dust-containing wastewater generated by water sprinkling, dust settling, fire extinguishing grouting, fire fighting and hydraulic equipment during the underground coal mining production process. Thus, it has both groundwater characteristics but is also subject to human contamination.
As part of coal dust and rock dust exist in water in a colloid dispersed state, mine wastewater is grey black and is polluted by human wastes, and the number of bacteria generally exceeds the standard. Meanwhile, in the mining process, the original geological conditions of each layer are destroyed, and a large amount of oxygen and water are provided, under the condition, pyrite and organic sulfur form sulfuric acid and metal ions through biological and chemical actions, so that the mine wastewater contains Fe2+、Fe3+、Al3+、、Zn2+、Mn2+、Cu2+And the pH value of the discharged water exceeds the standard due to acidification of the metal ions and the mine wastewater. In conclusion, the main pollution components of pollutants in mine wastewater are SS, pH, CODcr, petroleum and partial metal and nonmetal elements, and the wastewater is discharged to the environment to cause different degrees of damage to resources such as agriculture, land, forest and the like.
Most sewage treatment works are only stopped for discharge. However, recycling is the inevitable trend of current sewage treatment development, pollution control and recycling are combined, the contradiction between water supply and demand can be relieved, and pollution to surface water can be relieved. The treatment technology used in China mainly comprises the following steps: precipitation, coagulating sedimentation filtration and the like. The mine water directly discharged after treatment is usually treated by precipitation or coagulating sedimentation; after treatment, the water is used as production water or other water, and a coagulating sedimentation filtration treatment technology is usually adopted; after being treated, the water is used as domestic water, and after being filtered, the water must be subjected to the treatment of removing harmful substances to human bodies such as phenol and the like and disinfection; some mine water containing suspended matters has high salt content, and the mine water after being treated must be further desalted after being purified as drinking water.
In view of the above, there is a need for a system for treating and recycling mine wastewater with good treatment effect and recycling effect.
Disclosure of Invention
According to the defects in the prior art, the technical problems to be solved by the invention are as follows: the underground production wastewater treatment and recycling system is simple in structure, realizes standard discharge of mine wastewater, realizes recycling of the mine wastewater, reduces production cost, and is energy-saving and environment-friendly.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in the underground production wastewater treatment and recycling system, a wastewater storage tank is sequentially connected with a jet flow flotation machine, a grid, an aeration tank, a comprehensive adjusting tank, a coagulating sedimentation tank, a pH adjusting tank, an EGSB anaerobic reactor, an inclined plate sedimentation tank, an ozone sterilization tank and a reverse osmosis treatment tank; the pipeline connecting the EGSB anaerobic reactor and the inclined plate sedimentation tank is also connected with the top of the EGSB anaerobic reactor; the EGSB anaerobic reactor is also sequentially connected with a gas storage tank and a biogas generator; the aeration tank, the coagulating sedimentation tank, the EGSB anaerobic reactor, the inclined plate sedimentation tank and the ozone sterilization tank are all connected with the sludge concentration tank.
And the sludge concentration tank is connected with the plate-and-frame filter press.
The ozone sterilization pool is connected with an ozone generator.
The comprehensive adjusting tank is connected with an alkali feeding device.
And the jet flow flotation machine is connected with the oil residue recovery tank.
The pH adjusting tank is connected with an acid adding device.
The reverse osmosis treatment pool is connected with a concentrated solution recovery tank.
The aeration tank, the coagulating sedimentation tank, the EGSB anaerobic reactor, the inclined plate sedimentation tank and the ozone sterilization tank are all connected with the grouting water tank.
The jet flow flotation machine is used for removing oil drops in wastewater, is a novel oily sewage treatment device, has a structure close to that of a turbine, and has the working principle that when water or purified water is sprayed out from a nozzle at a high speed, air forms negative pressure suction in a suction chamber of the nozzle, and in a mixing section, when the water passes through the mixing section at a high speed, carried gas is sheared into micro-bubbles; in the flotation chamber, oil droplets float upwards along with bubbles attached to the oil droplets, and oil residues are taken to the water surface for removal. The jet pump replaces a rotary impeller, so that a water pump can be used for providing power, the energy consumption is saved, the floating speed is only one half of that of the impeller, the diameter of generated bubbles is small, and the jet pump is simple to manufacture and install, convenient to maintain and safe to operate.
The grating is used for intercepting larger suspended matters in the wastewater so as to ensure the normal operation of subsequent treatment structures and equipment and prolong the service life of the sewage pump.
The EGSB anaerobic reactor is a novel anaerobic reactor following the UASB, sludge and organic matters are fully mixed by high hydraulic load and high gas yield load, the sludge is in a full expansion state, the mass transfer rate is high, and the anaerobic reaction rate and the organic load are greatly improved. The pipeline connecting the EGSB anaerobic reactor and the inclined plate sedimentation tank is also connected with the top of the EGSB anaerobic reactor, so that the effluent of the EGSB anaerobic reactor flows back, the concentration of sulfate and other toxic and harmful substances can be diluted, and the sewage can be fully contacted with microorganisms.
Biogas generated by the EGSB anaerobic reactor enters the gas storage tank after being sealed by water, and can be used for self-supply of a sewage treatment system after being generated by a biogas generator through a flame arrester.
The comprehensive adjusting tank is connected with the blower and is used for better adjusting the water quality and the water quantity; and regulating the pH value of the wastewater to 10 by an alkali adding device.
The method comprises the following steps that (1) underground production wastewater is lifted to a wastewater storage tank through an underground drainage pump, then the wastewater overflows to a jet flotation machine for oil drop removal, then the wastewater after oil drop removal overflows to a grid, the grid intercepts large suspended matters and then enters an aeration tank, organic matters in the water are absorbed by aerobic microorganisms in activated sludge, the organic matters are oxidized and decomposed to form carbon dioxide and water, and meanwhile, the carbon dioxide and the water are proliferated and propagated; after aeration, the wastewater is pumped into a comprehensive regulating tank to regulate the water quality and water quantity, alkali is added to regulate the pH value of leachate to 10, then the leachate enters a coagulating sedimentation tank, and simultaneously FeSO is added through a feeder4Mixing and reacting agents such as PAC (polyaluminium chloride) and PAM (polyacrylamide) to remove metal ions and partial non-metal elements; the supernatant after coagulating sedimentation enters a pH regulating tank, the pH is regulated to 6-8 and then is lifted by a pump to enter an EGSB anaerobic reactor, the rising flow velocity in the EGSB anaerobic reactor is ensured by the external reflux of the EGSB anaerobic reactor, and after the sufficient action of anaerobic microorganisms, the effluent enters into an EGSB anaerobic reactorThe inclined plate sedimentation tank is used for further sedimentation; the supernatant after precipitation enters an ozone sterilization pool, organic matters which are difficult to degrade in the sewage are decomposed into small molecular organic matters, the biodegradability of the sewage is increased, the effluent of the ozone sterilization pool enters a reverse osmosis treatment pool, the stable standard discharge of the effluent is ensured, and the concentrated solution obtained after the treatment in the reverse osmosis treatment pool enters a concentrated solution recovery tank for recovery; sludge generated in the aeration tank, the coagulating sedimentation tank, the EGSB anaerobic reactor, the inclined plate sedimentation tank and the ozone sterilization tank enters a sludge concentration tank for treatment, the concentrated sludge enters a plate-and-frame filter press for filter pressing, and finally the sludge is subjected to landfill treatment; and the other part of sludge generated in the aeration tank, the coagulating sedimentation tank, the EGSB anaerobic reactor, the inclined plate sedimentation tank and the ozone sterilization tank enters a grouting water tank and can be used for yellow mud grouting.
The invention has the beneficial effects that:
the invention has simple structure, improves the discharge treatment effect of the mine wastewater, realizes the recycling of the mine wastewater, greatly reduces the cost of the post treatment of the sludge, and is energy-saving and environment-friendly.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. a waste water storage tank; 2. a jet flotation machine; 3. an oil residue recovery tank; 4. a grid; 5. an aeration tank; 6. an alkali adding device; 7. a comprehensive adjusting tank; 8. a coagulating sedimentation tank; 9. an acid adding device; 10. a pH adjusting tank; 11. an EGSB anaerobic reactor; 12. a gas storage tank; 13. a biogas generator; 14. a sloping plate sedimentation tank; 15. an ozone generator; 16. an ozone sterilization pool; 17. a reverse osmosis treatment tank; 18. a concentrated solution recovery tank; 19. grouting a water tank; 20. a sludge concentration tank; 21. and (4) a plate-and-frame filter press.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
the single device is commercially available equipment.
Example 1
As shown in fig. 1, in the system for treating and recycling the underground production wastewater, a wastewater storage tank 1 is connected with a jet flow flotation machine 2, a grid 4, an aeration tank 5, a comprehensive adjusting tank 7, a coagulation sedimentation tank 8, a pH adjusting tank 10, an EGSB anaerobic reactor 11, an inclined plate sedimentation tank 14, an ozone sterilization tank 16 and a reverse osmosis treatment tank 17 in sequence; the pipeline of the EGSB anaerobic reactor 11 connected with the inclined plate sedimentation tank 14 is also connected with the top of the EGSB anaerobic reactor 11; the EGSB anaerobic reactor 11 is also connected with a gas storage tank 12 and a methane generator 13 in sequence; the aeration tank 5, the coagulating sedimentation tank 8, the EGSB anaerobic reactor 11, the inclined plate sedimentation tank 14 and the ozone sterilization tank 16 are all connected with a sludge concentration tank 20.
The sludge concentration tank 20 is connected with a plate-and-frame filter press 21.
The ozone sterilizing pool 16 is connected with an ozone generator 15.
The comprehensive adjusting tank 7 is connected with an alkali adding device 6.
The jet flow flotation machine 2 is connected with the oil residue recovery tank 3.
The pH adjusting tank 10 is connected with an acid adding device 9.
The reverse osmosis treatment tank 17 is connected with a concentrated solution recovery tank 18.
The aeration tank 5, the coagulating sedimentation tank 8, the EGSB anaerobic reactor 11, the inclined plate sedimentation tank 14 and the ozone sterilization tank 16 are all connected with a grouting water tank 19.
The grating 4 is used for intercepting larger suspended matters in the wastewater so as to ensure the normal operation of subsequent treatment structures and equipment and prolong the service life of the sewage pump.
The EGSB anaerobic reactor 11 is a novel anaerobic reactor following the UASB, the sludge and organic matters are fully mixed by high hydraulic load and high gas yield load, the sludge is in a full expansion state, the mass transfer rate is high, and the anaerobic reaction rate and the organic load are greatly improved. The pipeline connecting the EGSB anaerobic reactor 11 and the inclined plate sedimentation tank 14 is also connected with the top of the EGSB anaerobic reactor 11, so that the effluent of the EGSB anaerobic reactor 11 flows back, the concentration of sulfate and other toxic and harmful substances can be diluted, and the sewage can be fully contacted with microorganisms.
Biogas generated by the EGSB anaerobic reactor 11 enters the gas storage tank 12 after being sealed by water, and is generated by the biogas generator 13 through the flame arrester, so that the biogas can be used for self-supply of a sewage treatment system.
The comprehensive adjusting tank 7 is connected with an air blower and is used for better adjusting water quality and water quantity; the pH value of the wastewater is adjusted to 10 by an alkali adding device 6.
The method comprises the following steps that (1) underground production wastewater is lifted to a wastewater storage tank 1 through an underground drainage pump, then the wastewater overflows to a jet flotation machine 2 for oil drop removal, then the wastewater after oil drop removal overflows to a grating 4, the grating 4 intercepts large suspended matters and then enters an aeration tank 5, organic matters in water are absorbed by aerobic microorganisms in activated sludge, and the organic matters are oxidized and decomposed to form carbon dioxide and water, and meanwhile, the carbon dioxide and the water are proliferated and propagated; after aeration, the wastewater is pumped into a comprehensive adjusting tank 7 to adjust the water quality and water quantity, alkali is added to adjust the pH value of the percolate to 10, then the percolate enters a coagulating sedimentation tank 8, and simultaneously FeSO is added through a feeder4Mixing and reacting agents such as PAC (polyaluminium chloride) and PAM (polyacrylamide) to remove metal ions and partial non-metal elements; the supernatant after coagulating sedimentation enters a pH adjusting tank 10, the pH is adjusted to 6-8 and then is lifted by a pump to enter an EGSB anaerobic reactor 11, the rising flow velocity in the EGSB anaerobic reactor 11 is ensured by the external reflux of the EGSB anaerobic reactor 11, and after the sufficient action of anaerobic microorganisms, the effluent enters an inclined plate sedimentation tank 14 for further sedimentation; the supernatant after precipitation enters an ozone sterilization pool 16, organic matters which are difficult to degrade in the sewage are decomposed into micromolecular organic matters, the biodegradability of the sewage is increased, the effluent of the ozone sterilization pool 16 enters a reverse osmosis treatment pool 17, the stable standard discharge of the effluent is ensured, and the concentrated solution obtained after the treatment of the reverse osmosis treatment pool 17 enters a concentrated solution recovery tank 18 for recovery; sludge generated in the aeration tank 5, the coagulating sedimentation tank 8, the EGSB anaerobic reactor 11, the inclined plate sedimentation tank 14 and the ozone sterilization tank 16 enters a sludge concentration tank 20 for treatment, the concentrated sludge enters a plate-and-frame filter press 21 for filter pressing, and finally the sludge is subjected to landfill treatment; and the other part of sludge generated in the aeration tank 5, the coagulating sedimentation tank 8, the EGSB anaerobic reactor 11, the inclined plate sedimentation tank 14 and the ozone sterilization tank 16 enters a grouting water tank 19 and can be used for yellow mud grouting.
The system in the embodiment is applied to the treatment of actual mine wastewater of a certain company, the CODcr removal rate reaches 99.5%, the SS removal rate reaches 98.3%, the chroma removal rate reaches 99.5%, the metal ion removal rate reaches 99.3%, and the pH of effluent is 6-8. The treated water reaches and is superior to the reuse standard specified in the Water quality Standard for Living general use of the people's republic of China (GB/T18920-.
After being fermented by the EGSB anaerobic reactor 11, the biogas can be generated and collected by about 9000m3The biogas generator 13 can generate electricity at 13000 degrees every day, and the electricity is directly returned to the sewage treatment workshop for use, so that the electricity demand of the sewage treatment workshop is met, the operation cost of the sewage treatment system is greatly reduced, and the biogas generator is energy-saving and environment-friendly.
Claims (8)
1. The utility model provides a system for treating and recycling underground production wastewater, which is characterized in that: the waste water storage tank (1) is sequentially connected with a jet flow flotation machine (2), a grid (4), an aeration tank (5), a comprehensive adjusting tank (7), a coagulating sedimentation tank (8), a pH adjusting tank (10), an EGSB anaerobic reactor (11), an inclined plate sedimentation tank (14), an ozone sterilization tank (16) and a reverse osmosis treatment tank (17); the pipeline of the EGSB anaerobic reactor (11) connected with the inclined plate sedimentation tank (14) is also connected with the top of the EGSB anaerobic reactor (11); the EGSB anaerobic reactor (11) is also connected with a gas storage tank (12) and a methane generator (13) in sequence; the aeration tank (5), the coagulating sedimentation tank (8), the EGSB anaerobic reactor (11), the inclined plate sedimentation tank (14) and the ozone sterilization tank (16) are all connected with the sludge concentration tank (20).
2. The downhole production wastewater treatment and reuse system according to claim 1, wherein: the sludge concentration tank (20) is connected with a plate-and-frame filter press (21).
3. The downhole production wastewater treatment and reuse system according to claim 1, wherein: the ozone sterilization pool (16) is connected with an ozone generator (15).
4. The downhole production wastewater treatment and reuse system according to claim 1, wherein: the comprehensive adjusting tank (7) is connected with an alkali adding device (6).
5. The downhole production wastewater treatment and reuse system according to claim 1, wherein: the jet flow flotation machine (2) is connected with the oil residue recovery tank (3).
6. The downhole production wastewater treatment and reuse system according to claim 1, wherein: the pH adjusting tank (10) is connected with an acid adding device (9).
7. The landfill leachate treatment system of claim 1, wherein: the reverse osmosis treatment pool (17) is connected with a concentrated solution recovery tank (18).
8. The landfill leachate treatment system of claim 1, wherein: the aeration tank (5), the coagulating sedimentation tank (8), the EGSB anaerobic reactor (11), the inclined plate sedimentation tank (14) and the ozone sterilization tank (16) are all connected with a grouting water tank (19).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911140633.1A CN112824336A (en) | 2019-11-20 | 2019-11-20 | Underground production wastewater treatment and recycling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911140633.1A CN112824336A (en) | 2019-11-20 | 2019-11-20 | Underground production wastewater treatment and recycling system |
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| CN112824336A true CN112824336A (en) | 2021-05-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115583741A (en) * | 2022-09-14 | 2023-01-10 | 中赟国际工程有限公司 | Method for treating low-salt high-suspended matter mine water to reach earth surface III-class standard |
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2019
- 2019-11-20 CN CN201911140633.1A patent/CN112824336A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115583741A (en) * | 2022-09-14 | 2023-01-10 | 中赟国际工程有限公司 | Method for treating low-salt high-suspended matter mine water to reach earth surface III-class standard |
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