CN114956476A - Gas field effluent disposal system - Google Patents
Gas field effluent disposal system Download PDFInfo
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- CN114956476A CN114956476A CN202210691820.4A CN202210691820A CN114956476A CN 114956476 A CN114956476 A CN 114956476A CN 202210691820 A CN202210691820 A CN 202210691820A CN 114956476 A CN114956476 A CN 114956476A
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- 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
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- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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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
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- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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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
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- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal 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
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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
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- C02F2303/04—Disinfection
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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
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
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- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a gas field wastewater treatment system, wherein gas field wastewater sequentially flows through a water discharge tank, an oil separation tank, an adjusting tank, a primary sedimentation tank, an intermediate water tank, an iron-carbon micro-electrolysis tank, a secondary sedimentation tank, a biochemical tank, an RO membrane filter tank and a clean water tank; an adjusting tank is arranged on one side of the oil separation tank, coarse screening equipment is obliquely arranged in the adjusting tank and comprises an arc-shaped supporting plate, a water leakage metal net, a sewage discharge net pipe and a support pipe; gas field waste water enters into the system and just begins to carry out preliminary treatment to big granule pollution in the waste water earlier, reduces to deposit the desanding and need consume longer time, guarantees that waste water can enter into follow-up waste water treatment process in the time of urgency, reduces the cost that waste water kept in and transported, through redox reaction, galvanic cell reaction, electrochemistry enrichment, physical adsorption, coagulating sedimentation etc. a series of reactions make organic matter broken chain ring opening in the water, carbonization, there is salt, heavy metal, organic pollutant in the sewage to obtain fully getting rid of.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a gas field wastewater treatment system.
Background
The waste water produced by gas field mining operation comprises drilling waste water, fracturing flow-back fluid and gas field water, and has complex components, unique properties and large treatment difficulty, if the waste water is not properly treated, the waste water, the soil environment and the like near a well site can be polluted to a certain extent, the sewage treatment with complex components generally adopts a physical, biological and chemical combination mode for treatment, and COD, heavy metals, salt, mineral oil and the like can be removed after the sewage passes through a treatment system, so that the waste water reaches the comprehensive sewage discharge standard (GB 8978-1996);
the gas field fracturing flow-back fluid generation process is that in the exploitation process, after a target layer is drilled, a hydraulic fracturing technology is used for injecting a fracturing fluid into a well at high pressure so as to fracture an underground rock stratum, release shale gas in the underground rock stratum, and enable the water injected into the stratum to flow back at different stages of gas generation of the shale gas, namely, a fracturing flow-back fluid is formed; it can be known to return flowing back production by gas field fracturing, gas field fracturing returns flowing back and uses water and sand as leading, after waste water enters into effluent disposal system, the sand in the waste water can precipitate in the pond, then through sludge pump discharge effluent disposal system, but the waste water deposits the degritting and need expend the longer time, simultaneously when the waste water treatment capacity increases, the waste water of source department can not enter into follow-up waste water treatment process when urgent, can increase the cost of keeping in and transporting of effluent disposal system.
Disclosure of Invention
The present invention is directed to a gas field wastewater treatment system to solve the above problems.
A gas field wastewater treatment system is characterized in that gas field wastewater sequentially flows through a water discharge tank, an oil separation tank, an adjusting tank, a primary sedimentation tank, an intermediate water tank, an iron-carbon micro-electrolysis tank, a secondary sedimentation tank, a biochemical tank, an RO membrane filtration tank and a clean water tank; an adjusting tank is arranged on one side of the oil separation tank, coarse screening equipment is obliquely arranged in the adjusting tank, and wastewater in the adjusting tank is lifted to a primary sedimentation tank by a water pump;
the coarse screening device comprises an arc-shaped supporting plate, a water leakage metal net, a sewage draining net pipe and a support pipe, wherein four groups of annular supporting frames are arranged on the periphery of the arc-shaped supporting plate at equal intervals, a metal net framework is arranged inside the water leakage metal net, and the water leakage metal net is rotatably arranged on the periphery of the annular supporting frames through the metal net framework.
Preferably, one side of equalizing basin is equipped with the one-level sedimentation tank, top between equalizing basin and the one-level sedimentation tank is connected with the pipeline, one side that the equalizing basin was kept away from to the one-level sedimentation tank is equipped with middle pond, top between one-level sedimentation tank and the middle pond is connected with the pipeline.
Preferably, the inside waste water of middle pond is carried to the inside of indisputable carbon micro-electrolysis pond through the water pump, the top of indisputable carbon micro-electrolysis pond is equipped with the inside of pipeline intercommunication second grade sedimentation tank.
Preferably, the top of second grade sedimentation tank one side passes through the biochemical pond of pipeline intercommunication, the top of one side in biochemical pond is equipped with the anaerobism pond apron, one side in biochemical pond is equipped with RO membrane filtration pond, the inside of RO membrane filtration pond is carried to the well waste water of biochemical pond through the water pump pressure boost.
Preferably, a pipeline is communicated between the RO membrane filter tank and the clean water tank, an accident tank is arranged on one side of the clean water tank, and the accident tank is communicated with the RO membrane filter tank through a buried pipeline.
Preferably, one side of equalizing basin is equipped with the motor room, the hinged door is installed to one side that the equalizing basin was kept away from in the motor room, the steelframe is all installed in the four corners at equalizing basin top, the canopy is installed at the top of steelframe, the slope is installed to canopy below and is washed by water the pipe, it evenly is equipped with a plurality of shower nozzles to wash by water one side that the pipe is close to the equalizing basin.
Preferably, the metal mesh framework comprises a support ring, support rods, a connecting ring, a sleeve and a belt pulley, four groups of support rods are welded to the periphery of the connecting ring at equal intervals, the support ring is welded to one end, away from the connecting ring, of each support rod, the sleeve is welded to one end, away from the sewage discharge net pipe, of each support ring, and the belt pulley is installed on one side, away from the support ring, of the outer wall of the sleeve.
Preferably, the internally mounted of motor room has the gear box, the motor is installed to one side of gear box, be connected with the drive belt between the output of gear box and the belt pulley.
Preferably, the top of unloading pond, oil interceptor, equalizing basin, one-level sedimentation tank, middle pond, little electrolysis pond of iron carbon, second grade sedimentation tank, biochemical pond, RO membrane filtering ponds, clean water basin is equipped with the pavement, the both sides welding of pavement has the handrail, one side that the pavement is close to is equipped with the stair.
Drawings
FIG. 1 is a schematic plan view of the present invention;
FIG. 2 is a schematic flow chart of the present invention;
FIG. 3 is a schematic view of a conditioning tank of the present invention;
FIG. 4 is a schematic perspective view of the coarse screening apparatus of the present invention;
FIG. 5 is a schematic internal view of the coarse screening apparatus of the present invention;
FIG. 6 is a schematic end view of the coarse screening apparatus of the present invention;
FIG. 7 is a schematic view of a portion of the metal mesh skeleton of the present invention;
FIG. 8 is a schematic view of the interior of the foundation of the present invention;
figure 9 is a schematic view of a portion of a buried pipeline of the present invention.
In the figure: 1. repairing the building; 101. concrete; 102. a waterproof layer; 103. reinforcing steel bars; 2. a ground surface; 3. burying a pipeline; 4. a pipeline landfill structure; 401. medium coarse sand; 402. carrying out medium sand; 403. a filament non-woven geotextile; 404. HDPE geomembranes; 405. a filament non-woven geotextile; 406. raw soil; 5. an oil separation tank; 6. a regulating reservoir; 601. a motor room; 602. a hinged door; 603. a steel frame; 604. a canopy; 7. a first-stage sedimentation tank; 8. a middle water tank; 9. a secondary sedimentation tank; 10. a sludge tank; 11. a biochemical pool; 1101. a cover plate of the anaerobic tank; 12. an iron-carbon micro-electrolysis cell; 13. an RO membrane filtration tank; 14. a clean water tank; 15. unloading the water tank; 16. an accident pool; 17. a walkway; 1701. a handrail; 1702. a staircase; 18. coarse screening equipment; 1801. an arc-shaped support plate; 1802. a water leaking metal net; 1803. a blowdown net pipe; 1804. a stent tube; 19. a gear case; 1901. a motor; 20. a flushing water pipe; 2021. a spray head; 22. an annular support; 2201. a ball support; 2202. a bushing; 23. a metal mesh skeleton; 2301. a support ring; 2302. a support bar; 2303. a connecting ring; 2304. a sleeve.
Advantageous effects
The invention has the beneficial effects that: the method is characterized in that large particle pollution in the wastewater is pretreated at first when the gas field wastewater enters the system, long time consumption for precipitation and desanding is reduced, the wastewater can enter a subsequent wastewater treatment process in an urgent manner, the temporary storage and transportation cost of the wastewater treatment system is reduced, the cell body structures of all parts in the system are treated in an anti-permeation treatment mode, the wastewater is prevented from permeating and overflowing when the system is purified, the COD value is reduced by adopting an iron-carbon micro-electrolysis process, the biodegradability of the wastewater is improved, organic matters in a water body are broken and subjected to open-loop and carbonization through a series of reaction effects such as oxidation-reduction reaction, primary battery reaction, electrochemical enrichment, physical adsorption, coagulating sedimentation and the like, so that the biodegradability of the wastewater is improved, the organic pollutants in the wastewater can be fully removed by adopting a biological contact oxidation treatment process, the one-stage two-stage ultrahigh pressure reverse osmosis membrane treatment process, and the salt in the wastewater can be removed, Heavy metals.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-9, the present invention provides an embodiment:
a gas field wastewater treatment system is characterized in that gas field wastewater sequentially flows through a water unloading tank 15, an oil separation tank 5, an adjusting tank 6, a primary sedimentation tank 7, an intermediate tank 8, an iron-carbon micro-electrolysis tank 12, a secondary sedimentation tank 9, a biochemical tank 11, an RO membrane filter tank 13 and a clean water tank 14.
Specifically, the gas field wastewater conveyed by a tank car is directly injected into a water unloading tank 15, hydrocarbon waste gas contained in the conveyed gas field wastewater is exposed through an aeration system (the aeration time is about 15 min), then the aerated gas field wastewater is subjected to oil separation treatment through an oil separation tank 5 and then lifted into an adjusting tank 6 through a lift pump to be adjusted and uniformly mixed, the gas field water with the uniformly-adjusted water quality is lifted into a primary sedimentation tank 7 through the lift pump, and sodium sulfate, polyaluminium chloride and polyacrylamide are added to primarily precipitate free matters in the water quality (the sedimentation time is about 2 h) so as to remove SS (suspended substances) in the water; meanwhile, adding a heavy metal trapping agent to chelate and trap heavy metals in water so as to remove the heavy metals in the water;
the gas field water after primary precipitation enters an intermediate water tank 8 in a self-flowing mode, is lifted to an iron-carbon micro-electrolysis tank 12 through a lifting pump, is added with hydrochloric acid to adjust the pH value, and then is subjected to micro-electrolysis to primarily treat COD in the water;
allowing the micro-electrolysis treated gas field water to flow into a secondary sedimentation tank 9 by gravity, adding sodium hydroxide to enable iron/ferrous ions carried in the effluent of the iron-carbon micro-electrolysis tank to form flocs under an alkaline condition, and allowing the flocs to flow into a biochemical tank 11 by gravity for anaerobic hydrolysis (the anaerobic time is about 48 hours);
and finally, allowing the gas field water subjected to anaerobic treatment to automatically flow into an aerobic tank for aeration to further remove COD (chemical oxygen demand) and ammonia nitrogen in the water, performing electrocatalytic oxidation on the aerated gas field sewage to remove organic matters in the water, and finally allowing the aerated gas field sewage to enter an RO (reverse osmosis) membrane filter tank for desalination treatment and discharge after reaching the standard.
An adjusting tank 6 is arranged on one side of the oil separation tank 5, a coarse screening device 18 is obliquely arranged in the adjusting tank 6, and the wastewater in the adjusting tank 6 is lifted to a primary sedimentation tank 7 by a water pump;
specifically, 5 inside brush skimmers that are provided with of oil interceptor, the skimmer utilizes brush adhesion oil spilling, and scrape the oil spilling leading-in to the oil trap, pump the oil spilling into the holding vessel through the pump, make in the sewage attach oil and water and separate, 6 inside two elevator pumps that are provided with of equalizing basin, waste water is poured into the grit in 6 inside back through coarse screening equipment 18 to waste water and is filtered, guarantee that waste water can flow into one-level sedimentation tank 7 as early as possible and deposit, coarse screening equipment 18 can reduce the precipitate of one-level sedimentation tank 7.
The coarse screening device 18 comprises an arc-shaped support plate 1801, a water leakage metal net 1802, a sewage discharge net 1803 and support pipes 1804, wherein four groups of annular support frames 22 are equidistantly arranged on the periphery of the arc-shaped support plate 1801, a metal net framework 23 is arranged inside the water leakage metal net 1802, and the water leakage metal net 1802 is rotatably mounted on the periphery of each annular support frame 22 through the metal net framework 23.
Specifically, the arc support plate 1801 is obliquely arranged along the inside of the regulating tank 6, the annular support 22 outside the arc support plate 1801 provides a support and installation position for the metal mesh framework 23, the outer periphery of the arc support plate 1801 is provided with a groove, the support ring 2301 of the metal mesh framework 23 is sleeved inside the groove, in order to reduce the friction between the arc support plate 1801 and the support ring 2301, the ball support 2201 is additionally arranged between the arc support plate 1801 and the support ring 2301, a plurality of balls are fixed inside the ball support 2201, meanwhile, the graphite bushings 2202 are arranged on two sides of the arc support plate 1801, which are in contact with the support ring 2301, so as to further reduce the friction between the arc support plate 1801 and the support ring 2301, ensure that the metal mesh framework 23 can normally rotate around the arc support plate 1801, the water-leaking metal mesh 1802 is welded outside the metal mesh framework 23, non-woven fabrics are adhered on the inner wall of the water-leaking metal mesh 1802, wastewater flows into the regulating tank 6 from an opening at one end of the water-leaking metal mesh 1802, waste water filters grit in the water through the metal mesh 1802 that leaks preliminarily, and the metal mesh 1802 that leaks wraps up bracing piece 2302 in blowdown pipe network 1803 one side equally, and the metal mesh 1802 that leaks is the tubular structure promptly, keeps away from blowdown pipe network 1803 and is the open structure, and sewage enters into inside the metal mesh 1802 that leaks from the open structure.
Further, one side of equalizing basin 6 is equipped with one-level sedimentation tank 7, and the top between equalizing basin 6 and the one-level sedimentation tank 7 is connected with the pipeline, and one side that equalizing basin 6 was kept away from to one-level sedimentation tank 7 is equipped with middle pond 8, and the top between one-level sedimentation tank 7 and the middle pond 8 is connected with the pipeline.
Specifically, the wastewater enters a primary sedimentation tank 7, hydrochloric acid and caustic soda are added to adjust the pH value of the wastewater, PAC and PAM flocculating agents are added under the condition of proper pH value, slowly stirring by a stirrer to form floccules of suspended matters, colloid, emulsified oil and the like in water, separating with water phase under gravity settling action, adding sodium carbonate to make Ca2+, Mg2+ and other ions form carbonate, removing total hardness, adding sodium sulfate, sulfate ion and Ba2+ in wastewater to form barium sulfate precipitate, adding HMC-M1 recapture agent, carrying out chelation reaction with various heavy metal ions such as Cu2+, Cd2+, Hg2+, Pb2+, Mn2+, Ni2+, Zn2+, Cr6+ and the like in the wastewater, and insoluble flocculent precipitate which has low water content and is easy to filter and remove is quickly generated in a short time, and the clear water on the upper layer of the wastewater after precipitation automatically flows into the intermediate water tank 8 for secondary precipitation.
Further, the inside waste water of middle pond 8 is carried to the inside of little electrolytic cell 12 of iron carbon through the water pump, and the top of little electrolytic cell 12 of iron carbon is equipped with the inside of pipeline intercommunication second grade sedimentation tank 9.
Specifically, the wastewater is lifted to enter an iron-carbon micro-electrolysis tank, hydrochloric acid is added to adjust the pH value, through iron-carbon fillers in a micro-electrolysis treatment device under an acidic condition, the high-grade oxidation action of a Fe/C primary battery decomposes refractory organic matters in the wastewater, most organic pollutants in the wastewater are removed, the biodegradability of the wastewater is improved, iron/ferrous ions in the wastewater are further subjected to flocculation precipitation in a secondary sedimentation tank under an alkaline condition, the iron-carbon fillers are not replaced, the consumed iron-carbon fillers are added periodically, and the addition amount is supplemented by about 2-3 tons per month;
carrying iron/ferrous ions in the effluent of the secondary sedimentation tank 9 iron-carbon micro-electrolysis tank, adjusting the pH value of the effluent in the secondary sedimentation tank by sodium hydroxide to make the wastewater alkaline, adding PAC and PAM flocculating agents, slowly stirring the mixture by a stirrer, forming flocs by the iron/ferrous ions and the flocculating agents under the alkaline condition, and separating and removing the flocs through the gravity settling effect.
Further, the top of second grade sedimentation tank 9 one side passes through pipeline intercommunication biochemical pond 11, and the top of one side of biochemical pond 11 is equipped with anaerobism pond apron 1101, and one side of biochemical pond 11 is equipped with RO membrane filtration pond 13, and the inside of RO membrane filtration pond 13 is carried in the well waste water of biochemical pond 11 through the water pump pressure boost.
Specifically, the interior of the biochemical tank 11 is divided into an anaerobic biochemical part and an aerobic biochemical part by the building 1, and the top of the tank body of the anaerobic biochemical part is covered with an anaerobic tank cover plate 1101;
under the anoxic condition, on one hand, the facultative anaerobes are utilized to decompose macromolecular organic matters in the effluent of the secondary sedimentation tank into micromolecular organic matters easy to aerobically biochemically, so that the removal effect of a subsequent aerobic treatment unit is improved; on the other hand, nitrate or nitrite brought by the backflow of the contact oxidation tank is converted into nitrogen to escape into the atmosphere by the denitrification of denitrifying bacteria, so that the aim of denitrification is fulfilled;
the biological contact oxidation method has the characteristics of an activated sludge method and a biofilm method, honeycomb fillers are filled in an aeration tank, the fillers are immersed in water, and blast aeration is carried out by aerating and oxygenating at the bottom of the fillers by using an air blower; activated sludge is attached to the surface of the filler and does not flow along with water, the biological membrane is directly and continuously updated by strong stirring of ascending airflow, the purification effect is greatly improved, and good growth and metabolic activity are kept in a high-salt environment of 2% -4% by adopting directionally domesticated salt-tolerant microorganisms.
Furthermore, pipelines are communicated between the residual clean water tank 14 of the RO membrane filtration tank 13, an accident tank 16 is arranged on one side of the clean water tank 14, and the accident tank 16 is communicated with the RO membrane filtration tank 13 through the buried pipeline 3.
Specifically, the RO membrane filtration tank 13 adopts a combined process of Microfiltration (MF), Ultrafiltration (UF) and Reverse Osmosis (RO) to remove chloride salts and heavy metal ions in the wastewater, and the Reverse Osmosis (RO) adopts a first-stage two-stage ultrahigh pressure reverse osmosis membrane treatment process;
first stage SWRO system design parameters:
incoming water TDS: 3 to 4 percent of
Operating pressure: salt rejection at 8 MPa: 90 percent of
And (3) recovery rate: 50% (concentrated water TDS6% -8%) second-stage UHPRO system design parameters: incoming water TDS: 6 to 8 percent of
Operating pressure: salt rejection at 12 MPa: 75 percent of
And (3) recovery rate: 50% (concentrated water TDS12% -16%)
The comprehensive recovery rate is as follows: 50% + (1-50%) 50% =75% comprehensive salt rejection: 97.5 percent.
Further, one side of equalizing basin 6 is equipped with motor room 601, and hinged door 602 is installed to one side that adjusting basin 6 was kept away from to motor room 601, and steelframe 603 is all installed at the four corners at equalizing basin 6 top, and canopy 604 is installed at the top of steelframe 603, and the slope is installed below canopy 604 and is washed by water pipe 20, and one side that it is close to equalizing basin 6 to wash by water pipe 20 evenly is equipped with a plurality of shower nozzles 2021.
Specifically, motor room 601 is inside to provide installation space for motor and gear box 19, the steelframe 603 at equalizing basin top supports canopy 604, the canopy provides the slope mounted position for washing by water pipe 20, wash by water pipe 20 and coarse screening equipment 18 parallel arrangement, and be located arc backup pad 1801 directly over, metal mesh 1802 that leaks is rotatory around arc backup pad 1802, water and less granule can be followed the mesh and dropped to the inside of equalizing basin 6, great floater and grit can be stayed the inside of metal mesh 1802 that leaks, in order to avoid the mesh of metal mesh 1802 that leaks to be blockked up by the foreign matter, adopt shower nozzle 2021 department to spray high-pressure rivers and rush into the inside metal mesh 1802 that leaks with the foreign matter, but with this assurance device normal operating.
Further, the metal mesh framework 23 comprises a support ring 2301, support rods 2302, a connection ring 2303, a sleeve 2304 and a belt pulley 2305, four groups of support rods 2302 are welded on the periphery of the connection ring 2303 at equal intervals, the support ring 2301 is welded on one end of each of the support rods 2302 far away from the connection ring 2303, the sleeve 2304 is welded on one end of each of the support rings 2301 far away from the sewage drainage pipe network 1803, and the belt pulley 2305 is installed on one side of the outer wall of each of the sleeves 2304 far away from the support rings 2301;
a gear box 19 is installed inside the motor room 601, a motor 1901 is installed on one side of the gear box 19, and a transmission belt is connected between the output of the gear box 19 and a belt pulley 2305.
Specifically, the output end of the motor of the gear box 19 is connected with the input end of the gear box 19, the output end of the gear box 19 is in transmission with the belt pulley 2305 through a transmission belt, the belt pulley 2305 is installed outside the sleeve 2304, and the sleeve is sleeved at one end of the sewage draining network pipe 1803, so that the motor 20 can be ensured to drive the water leaking metal net 18 to rotate.
Furthermore, the top of the water unloading pool 15, the oil separation pool 5, the adjusting pool 6, the primary sedimentation pool 7, the middle pool 8, the iron-carbon micro-electrolysis pool 12, the secondary sedimentation pool 9, the biochemical pool 11, the RO membrane filtration pool 13 and the clean water pool 14 is provided with a walkway 17, handrails 1701 are welded on two sides of the walkway 17, and one side of the walkway 17 close to the adjusting pool 5 is provided with a stair 1702.
Specifically, the water unloading pool 15, the oil separation pool 5, the regulating pool 6, the primary sedimentation pool 7, the intermediate pool 8, the iron-carbon micro-electrolysis pool 12, the secondary sedimentation pool 9, the biochemical pool 11, the RO membrane filtration pool 13 and the clean water pool 14 are formed by building a building 1, the building 1 is formed by pouring concrete 101 by reinforcing steel bars 103, the inner surface of the pool body is coated with a cement-based permeable crystalline or polyurea-sprayed impermeable coating waterproof layer 102 (the permeability coefficient is not more than 1.0 multiplied by 10-12 cm/s), and the structural thickness is not less than 300 mm; the pipeline network between the ponds is paved by adopting anti-corrosion and anti-explosion materials to prevent the leakage caused by settlement, wherein the buried pipeline 3 used between the ponds is prevented from seepage, and the seepage is prevented by adopting a structure of backfilling medium coarse sand 401, filament non-woven geotextile 403, HDPE geomembrane 404 with the thickness of 2mm, filament non-woven geotextile 405, medium sand 402 cushion layer and rammed raw soil 406.
The system firstly carries out pretreatment on large-particle pollution in the wastewater when the wastewater enters the system, in order to ensure the biodegradability of the wastewater, before the wastewater enters a biochemical treatment section, an iron-carbon micro-electrolysis process is adopted to reduce the COD value and improve the biodegradability of the wastewater, salt-tolerant microorganisms selected and bred in advance are relied on, a regulation buffer system of the system is assisted to ensure that the salt concentration in the system is maintained under a relatively stable condition, a biochemical treatment unit can be ensured to maintain good metabolic activity to a certain degree, and partial organic pollutants are removed, a biological contact oxidation process is adopted, a biomembrane method has stronger toxicity resistance and impact load resistance, and the processes of coagulation sedimentation, iron-carbon micro-electrolysis, secondary coagulation sedimentation, oxygen deficiency, aerobic contact oxidation, electrocatalytic oxidation, Microfiltration (MF), Ultrafiltration (UF) and Reverse Osmosis (RO) are adopted to remove the organic pollutants in the wastewater, organic matter, colloids, viruses, bacteria, suspended matter, etc.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. A gas field wastewater treatment system is characterized in that gas field wastewater sequentially flows through a water discharge tank, an oil separation tank, an adjusting tank, a primary sedimentation tank, an intermediate water tank, an iron-carbon micro-electrolysis tank, a secondary sedimentation tank, a biochemical tank, an RO membrane filtration tank and a clean water tank; the method is characterized in that: an adjusting tank is arranged on one side of the oil separation tank, coarse screening equipment is obliquely arranged in the adjusting tank, and wastewater in the adjusting tank is lifted to a primary sedimentation tank by a water pump;
the coarse screening device comprises an arc-shaped supporting plate, a water leakage metal net, a sewage draining net pipe and a support pipe, wherein four groups of annular supporting frames are arranged on the periphery of the arc-shaped supporting plate at equal intervals, a metal net framework is arranged inside the water leakage metal net, and the water leakage metal net is rotatably arranged on the periphery of the annular supporting frames through the metal net framework.
2. The gas field wastewater treatment system of claim, wherein: one side of equalizing basin is equipped with the one-level sedimentation tank, top between equalizing basin and the one-level sedimentation tank is connected with the pipeline, one side that the equalizing basin was kept away from to the one-level sedimentation tank is equipped with middle pond, top between one-level sedimentation tank and the middle pond is connected with the pipeline.
3. The gas field wastewater treatment system of claim, wherein: the inside waste water of middle pond is carried to the inside of little electrolytic bath of iron carbon through the water pump, the top of little electrolytic bath of iron carbon is equipped with the inside of pipeline intercommunication second grade sedimentation tank.
4. The gas field wastewater treatment system of claim, wherein: the top of one side of the secondary sedimentation tank is communicated with the biochemical tank through a pipeline, the top of one side of the biochemical tank is provided with an anaerobic tank cover plate, one side of the biochemical tank is provided with an RO membrane filter tank, and the middle wastewater of the biochemical tank is pressurized by a water pump and conveyed to the inside of the RO membrane filter tank.
5. The gas field wastewater treatment system of claim, wherein: the RO membrane filter tank is characterized in that a pipeline is communicated between the residual clean water tanks, an accident tank is arranged on one side of the clean water tank, and the accident tank is communicated with the RO membrane filter tank through a buried pipeline.
6. The gas field wastewater treatment system of claim, wherein: one side of equalizing basin is equipped with the motor room, the hinged door is installed to one side that the equalizing basin was kept away from in the motor room, the steelframe is all installed in the four corners at equalizing basin top, the canopy is installed at the top of steelframe, the slope is installed to canopy below and is washed by water the water pipe, it evenly is equipped with a plurality of shower nozzles to wash by water one side that the water pipe is close to the equalizing basin.
7. The gas field wastewater treatment system of claim, wherein: the metal mesh framework comprises a support ring, support rods, a connecting ring, a sleeve and a belt pulley, wherein four groups of support rods are welded on the periphery of the connecting ring at equal intervals, the support ring is welded at one end, away from the connecting ring, of each support rod, the sleeve is welded at one end, away from the sewage discharge net pipe, of each support ring, and the belt pulley is installed on one side, away from the support ring, of the outer wall of the sleeve.
8. The gas field wastewater treatment system of claim or the above, wherein: the internal mounting of motor room has the gear box, the motor is installed to one side of gear box, be connected with the drive belt between the output of gear box and the belt pulley.
9. The gas field wastewater treatment system of claim, wherein: the top of unloading pond, oil interceptor, equalizing basin, one-level sedimentation tank, middle pond, indisputable carbon micro-electrolysis pond, second grade sedimentation tank, biochemical pond, RO membrane filtration pond, clean water basin is equipped with the pavement, the both sides welding of pavement has the handrail, one side that the pavement is close to is equipped with the stair.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106219893A (en) * | 2016-08-31 | 2016-12-14 | 重庆融极环保工程有限公司 | A kind of well-drilling waste water processes technique |
| CN208071546U (en) * | 2018-03-16 | 2018-11-09 | 天津邦盛净化设备工程有限公司 | A kind of chemical wastewater treatment standard emission system |
| CN208995338U (en) * | 2018-09-25 | 2019-06-18 | 成都渤茂科技有限公司 | A kind of processing system of oilfield drilling waste liquid |
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- 2022-06-18 CN CN202210691820.4A patent/CN114956476A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106219893A (en) * | 2016-08-31 | 2016-12-14 | 重庆融极环保工程有限公司 | A kind of well-drilling waste water processes technique |
| CN208071546U (en) * | 2018-03-16 | 2018-11-09 | 天津邦盛净化设备工程有限公司 | A kind of chemical wastewater treatment standard emission system |
| CN208995338U (en) * | 2018-09-25 | 2019-06-18 | 成都渤茂科技有限公司 | A kind of processing system of oilfield drilling waste liquid |
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Application publication date: 20220830 |