CN114044605A - Electrocatalytic oxidation treatment method for gas production wastewater of foam drainage - Google Patents
Electrocatalytic oxidation treatment method for gas production wastewater of foam drainage Download PDFInfo
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- CN114044605A CN114044605A CN202111195672.9A CN202111195672A CN114044605A CN 114044605 A CN114044605 A CN 114044605A CN 202111195672 A CN202111195672 A CN 202111195672A CN 114044605 A CN114044605 A CN 114044605A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 230000003647 oxidation Effects 0.000 title claims abstract description 35
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 35
- 239000006260 foam Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000003756 stirring Methods 0.000 claims abstract description 28
- 238000004062 sedimentation Methods 0.000 claims abstract description 21
- 238000005345 coagulation Methods 0.000 claims abstract description 20
- 230000015271 coagulation Effects 0.000 claims abstract description 20
- 239000010865 sewage Substances 0.000 claims abstract description 18
- 238000001556 precipitation Methods 0.000 claims abstract description 10
- 230000001112 coagulating effect Effects 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 9
- 239000003657 drainage water Substances 0.000 claims abstract description 7
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 230000005484 gravity Effects 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 26
- 238000005273 aeration Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005276 aerator Methods 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 12
- 229920002401 polyacrylamide Polymers 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 239000000701 coagulant Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000005868 electrolysis reaction Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005187 foaming Methods 0.000 claims description 5
- 241000193410 Bacillus atrophaeus Species 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 241000193470 Clostridium sporogenes Species 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 4
- 125000000129 anionic group Chemical group 0.000 claims description 4
- 125000002091 cationic group Chemical group 0.000 claims description 4
- 238000005189 flocculation Methods 0.000 claims description 4
- 230000016615 flocculation Effects 0.000 claims description 4
- 230000007062 hydrolysis Effects 0.000 claims description 4
- 238000006460 hydrolysis reaction Methods 0.000 claims description 4
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- 239000008267 milk Substances 0.000 claims description 4
- 235000013336 milk Nutrition 0.000 claims description 4
- 210000004080 milk Anatomy 0.000 claims description 4
- 230000020477 pH reduction Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000001223 reverse osmosis Methods 0.000 claims description 4
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 4
- 230000001954 sterilising effect Effects 0.000 claims description 4
- 238000004659 sterilization and disinfection Methods 0.000 claims description 4
- 230000005587 bubbling Effects 0.000 claims 2
- 241001644508 Pectinatus brassicae Species 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000003750 conditioning effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 20
- 238000002156 mixing Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 6
- 240000007643 Phytolacca americana Species 0.000 abstract description 4
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- 150000003839 salts Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 28
- 239000012535 impurity Substances 0.000 description 12
- 239000003814 drug Substances 0.000 description 10
- 238000007790 scraping Methods 0.000 description 9
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 238000006864 oxidative decomposition reaction Methods 0.000 description 5
- 239000010812 mixed waste Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000008394 flocculating agent Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
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- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000013051 drainage agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000015784 hyperosmotic salinity response Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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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
-
- 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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic 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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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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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- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention relates to the technical field of foam drainage wastewater treatment, and discloses an electrocatalytic oxidation treatment method for foam drainage gas production wastewater, which comprises the following steps: s1: a collecting tank, wherein the gas production sewage is collected and subjected to precipitation treatment; s2: a homogeneous receiving pool, wherein the precipitated sewage is introduced into the homogeneous receiving pool, then free oil obtained from the upper part of the homogeneous receiving pool through gravity separation is recovered and enters a sump oil recovery tank for storage, and other foam drainage water is collected; s3: coagulating sedimentation, namely introducing the treated foam drainage into a coagulation device for coagulation treatment; s4: and (4) an electrolytic oxidation cell. According to the invention, the microbes capable of resisting salt with high degree are adopted to carry out biochemical treatment on the foam drainage, the treatment process is simple, the energy consumption is low, and various substances in the foam drainage can be treated more thoroughly, the stirring and mixing of the mixed wastewater are realized by the matching use of the poke rod and the spiral sheet, and the mixing effect of the device is improved.
Description
Technical Field
The invention relates to the technical field of foam drainage wastewater treatment, in particular to an electrocatalytic oxidation treatment method for foam drainage gas production wastewater.
Background
With the continuous development of gas fields and the improvement of reserve utilization degree, the water yield of gas reservoirs and the number of water outlet wells are increased continuously, and the problems that the normal production is influenced by the accumulated liquid and the effluent of a shaft of a gas well are gradually developed. The accumulated liquid in the shaft increases the back pressure to the gas layer, limits the production capacity of the well, and can stop the gas well from spraying completely due to too large accumulated liquid amount in the shaft. In addition, the liquid column in the shaft can damage the stratum near the shaft, the gas phase permeability is reduced, and the final recovery rate of the gas field is seriously influenced. The bubble drainage technology is characterized in that a large amount of surfactant is injected into a well, and when accumulated water at the bottom of the well contacts with chemical agents, a large amount of low-density gas-water foam is generated, so that the gas-water flow state in the shaft is improved, the accumulated water at the bottom of the well is lifted to the ground, and all liquid flowing into the shaft is continuously drained.
The gas production bubble drainage has the intractable of foaming due to the addition of the bubble drainage agent, the contents of COD, mineral oil, ammonia nitrogen, mineralization degree and calcium and magnesium in the bubble drainage are higher, and due to foaming, the waste water cannot realize the effective operation of an evaporation device and needs to be treated, but the general treatment method cannot well perform electrocatalytic oxidation, and when mixed precipitation is performed, the efficiency is low, and the requirements of people cannot be met.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an electrocatalytic oxidation treatment method for gas production wastewater of foam drainage, which solves the problems that the electrocatalytic oxidation cannot be well carried out by the conventional treatment method, and the efficiency is low and the requirements of people cannot be met when mixed precipitation is carried out.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
an electrocatalytic oxidation treatment method for gas production wastewater of foam drainage comprises the following steps:
s1: a collecting tank, wherein the gas production sewage is collected and subjected to precipitation treatment;
s2: a homogeneous receiving pool, wherein the precipitated sewage is introduced into the homogeneous receiving pool, then free oil obtained from the upper part of the homogeneous receiving pool through gravity separation is recovered and enters a sump oil recovery tank for storage, and other foam drainage water is collected;
s3: coagulating sedimentation, namely introducing the treated foam drainage into a coagulation device for coagulation treatment;
s4: an electrolytic oxidation tank, wherein the treated sewage is led into the electrolytic tank, and then the electrolytic flocculation treatment is carried out under the action of direct current by taking metals such as aluminum, iron and the like as anodes;
s5: a buffer adjusting tank, wherein after the coagulating sedimentation, a regulator is added to adjust the PH value;
s6: the biochemical tank is used for introducing the wastewater regulated by the buffer regulating tank into the anaerobic tank for hydrolysis acidification treatment, and then introducing the wastewater into the aeration tank for twice aeration treatment, wherein the aeration time is 20-40 minutes, and the interval between the two times of aeration is 1-5 minutes;
s7: a sedimentation tank, wherein the sewage treated by the biochemical tank is introduced into the sedimentation tank, then activated carbon particles are added, then stirring is carried out for 10-30 minutes, and standing sedimentation is carried out for 1-4 hours after stirring;
s8: and the water purifying tank is used for discharging the settled wastewater to a filtering tank unit for filtering treatment to remove micro flocculates, and then hypochlorous acid is added for sterilization, wherein the filtering unit comprises a reverse osmosis treatment module.
In a still further embodiment of the present invention, a coagulant, a demulsifier, and a softener are added during coagulation in S3, wherein the coagulant is any one of aluminum sulfate, polyaluminum chloride, and polyaluminum ferric.
Further, in the step S4, a flocculating agent is added during electrolysis, and the flocculating agent is any one of cationic polyacrylamide, anionic polyacrylamide and amphoteric polyacrylamide.
On the basis of the scheme, the regulator in S5 is any one of lime milk, caustic soda or dilute sulfuric acid and hydrochloric acid.
Further, one or more of pectinate brassicae, clostridium sporogenes, facultative anaerobe and bacillus atrophaeus are added into the anaerobic pool in the S6.
On the basis of the scheme, the device that congeals in S3 includes the casing, the bottom inner wall swing joint of casing has first connecting axle, one side fixedly connected with puddler of first connecting axle, the top outer wall fixedly connected with motor of casing, and the one end of the output shaft of motor passes the casing and fixes mutually with first connecting axle, the equal fixedly connected with poker rod in both sides of first connecting axle, the circumference outside swing joint of poker rod has the sleeve, the equal swing joint of both sides inner wall of casing has the second connecting axle, the circumference outside fixedly connected with flight of second connecting axle, the top fixedly connected with atress pole of second connecting axle, and atress pole and sleeve contact, the circumference outside swing joint of second connecting axle has the torsional spring, and the both ends of torsional spring are fixed mutually with second connecting axle and casing respectively.
In a further scheme of the invention, one side of the shell is provided with an insertion hole, a tubular aerator is fixedly connected in the insertion hole, two scraping plates are fixedly connected to the bottom of the first connecting shaft, and the scraping plates are in contact with the shell.
Further, the inlet and add the medicine mouth have been seted up respectively at the top of casing, and the inlet with add the medicine mouth in respectively fixedly connected with feed liquor pipe and add the medicine pipe, the slag notch has been seted up to the bottom of casing, the interior fixedly connected with pipe of slagging tap of slag notch, the mounting hole has been seted up to one side of casing, fixedly connected with observation window in the mounting hole.
On the basis of the scheme, a plurality of liquid outlets are formed in one side of the shell, liquid outlet pipes are fixedly connected in the liquid outlets, a plurality of supporting plates are fixedly connected to the outer wall of the bottom of the shell, and the supporting plates are evenly distributed.
(III) advantageous effects
Compared with the prior art, the invention provides an electrocatalytic oxidation treatment method for gas production wastewater of foam drainage, which has the following beneficial effects:
1. according to the invention, the poke rod is matched with the spiral piece, the force-bearing rod drives the spiral piece to rotate by the rotation of the poke rod, the spiral piece rotates to push the mixed wastewater, the stirring and mixing of the mixed wastewater are realized, and the mixing effect of the device is improved.
2. According to the invention, the tubular aerator is arranged on the shell, and the tubular aerator aerates the mixed wastewater to ensure that the mixed wastewater obtains enough dissolved oxygen, so that organic matters in the wastewater are subjected to oxidative decomposition, and the decomposition effect of the device is improved.
3. According to the invention, through the arrangement of the scraper arranged on the shell, the scraper can scrape the adhered substances at the bottom of the shell, so that the adhered substances are prevented from accumulating at the bottom of the shell to influence the treatment effect of the mixed wastewater, and the scraping effect of the device is improved.
4. In the invention, the colloidal impurities and the suspended impurities in the wastewater are coagulated, precipitated and separated through electrolysis, the coagulation and precipitation effects on the colloidal impurities and the suspended impurities are realized, the oxidation effect can be improved due to the oxidation effect of the anode and the reduction effect of the cathode, the addition of the flocculating agent can improve the oxidation effect without residue, the effect is good, the biochemical treatment is carried out on the foam drainage water by adopting the microorganisms with high salt tolerance, the treatment process is simple, the energy consumption is low, and various substances in the foam drainage water can be treated more thoroughly.
Drawings
FIG. 1 is a schematic structural view of a main view of an electrocatalytic oxidation treatment method for gas production wastewater of foam drainage provided by the invention;
FIG. 2 is a schematic view of the bottom structure of the electrocatalytic oxidation treatment method for gas production wastewater from foam discharging in accordance with the present invention;
FIG. 3 is a schematic sectional view of a housing of the electrocatalytic oxidation treatment method for gas production wastewater from foaming drainage provided by the invention;
FIG. 4 is a schematic view of the flow structure of the electrocatalytic oxidation treatment method for the gas production wastewater of the foam discharging system provided by the invention.
In the figure: 1. a liquid inlet pipe; 2. a housing; 3. a tubular aerator; 4. a support plate; 5. a liquid outlet pipe; 6. a motor; 7. a medicine feeding pipe; 8. a slag pipe; 9. an observation window; 10. a first connecting shaft; 11. a stirring rod; 12. a squeegee; 13. a torsion spring; 14. a second connecting shaft; 15. a stress beam; 16. a spiral sheet; 17. a sleeve; 18. a poke rod.
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.
Example 1
Referring to fig. 1-4, an electrocatalytic oxidation treatment method for gas production wastewater of foam drainage comprises the following steps:
s1: a collecting tank, wherein the gas production sewage is collected and subjected to precipitation treatment;
s2: a homogeneous receiving pool, wherein the precipitated sewage is introduced into the homogeneous receiving pool, then free oil obtained from the upper part of the homogeneous receiving pool through gravity separation is recovered and enters a sump oil recovery tank for storage, and other foam drainage water is collected;
s3: coagulating sedimentation, namely introducing the treated foam drainage into a coagulation device for coagulation treatment;
s4: an electrolytic oxidation tank, wherein the treated sewage is led into the electrolytic tank, and then the electrolytic flocculation treatment is carried out under the action of direct current by taking metals such as aluminum, iron and the like as anodes;
s5: a buffer adjusting tank, wherein after the coagulating sedimentation, a regulator is added to adjust the PH value;
s6: the biochemical tank is used for introducing the wastewater regulated by the buffer regulating tank into the anaerobic tank for hydrolysis acidification treatment and then introducing the wastewater into the aeration tank for twice aeration treatment, wherein the aeration time is 20 minutes, and the interval between the two times of aeration is 2 minutes;
s7: a sedimentation tank, wherein the sewage treated by the biochemical tank is introduced into the sedimentation tank, then activated carbon particles are added, then stirring is carried out for 15 minutes, and standing sedimentation is carried out for 2 hours after stirring;
s8: and the water purifying tank is used for discharging the settled wastewater to a filtering tank unit for filtering treatment to remove micro flocculates, and then hypochlorous acid is added for sterilization, wherein the filtering unit comprises a reverse osmosis treatment module.
In the invention, coagulant, demulsifier and softener are added during coagulation in S3, wherein the coagulant is any one of aluminum sulfate, polyaluminium chloride and polyaluminium-iron, flocculant is added during electrolysis in S4, the flocculant is any one of cationic polyacrylamide, anionic polyacrylamide and amphoteric polyacrylamide, colloidal impurities and suspended impurities in wastewater are coagulated, precipitated and separated through electrolysis, the flocculant not only has coagulation and precipitation effects on the colloidal impurities and the suspended impurities, but also can improve oxidation effect due to oxidation of an anode and reduction of a cathode, no residue is left, the effect is good, a regulator in S5 is any one of lime milk, caustic soda or dilute sulfuric acid and hydrochloric acid, one or more of pectinate, clostridium sporogenes, facultative anaerobe and bacillus atrophaeus are added in an anaerobic tank in S6, and high-salt-tolerant microbes are adopted to carry out biochemical treatment on bubble drainage, the treatment process is simple, the energy consumption is low, and various substances in the foam drainage can be treated more thoroughly.
It should be particularly noted that the coagulation device in S3 includes a housing 2, a first connecting shaft 10 is rotatably connected to the bottom inner wall of the housing 2, a stirring rod 11 is fixed to one side of the first connecting shaft 10 by bolts, the first connecting shaft 10 rotates to rotate the stirring rod 11, so as to primarily stir and mix the mixed wastewater, a motor 6 is fixed to the top outer wall of the housing 2 by bolts, one end of an output shaft of the motor 6 passes through the housing 2 and is fixed to the first connecting shaft 10, a poking rod 18 is fixed to both sides of the first connecting shaft 10 by bolts, a sleeve 17 is sleeved on the circumference outer side of the poking rod 18, a second connecting shaft 14 is rotatably connected to both side inner walls of the housing 2, a spiral piece 16 is fixed to the circumference outer side of the second connecting shaft 14 by bolts, a stress rod 15 is fixed to the top of the second connecting shaft 14 by bolts, and the stress rod 15 contacts the sleeve 17, torsional spring 13 has been cup jointed to the circumference outside of second connecting axle 14, and the both ends of torsional spring 13 are fixed mutually with second connecting axle 14 and casing 2 respectively, and poker rod 18 rotates and makes the atress pole 15 drive the flight 16 and rotate, and the flight 16 rotates and promotes mixed waste water, realizes mixing the stirring of mixed waste water.
Particularly, one side of the shell 2 is provided with an insertion hole, a tubular aerator 3 is inserted in the insertion hole, the tubular aerator 3 aerates the mixed wastewater, so that the mixed wastewater can obtain enough dissolved oxygen, and further, organic matters in the wastewater can be subjected to oxidative decomposition, two scraping plates 12 are fixed at the bottom of the first connecting shaft 10 through bolts, the scraping plates 12 are in contact with the shell 2, the scraping plates 12 can scrape off adhered matters at the bottom of the shell 2, the adhered matters are prevented from accumulating at the bottom of the shell 2 to influence the treatment effect of the mixed wastewater, the top of the shell 2 is respectively provided with a liquid inlet and a medicine feeding port, a liquid inlet pipe 1 and a medicine feeding pipe 7 are respectively fixed in the liquid inlet and the medicine feeding port through bolts, the bottom of the shell 2 is provided with a slag outlet, a slag outlet pipe 8 is fixed in the slag outlet through bolts, one side of the shell 2 is provided with a mounting port, and an observation window 9 is fixed in the mounting port through bolts, the observation window 9 can make things convenient for the staff to observe the condition of handling of bubble row gas production waste water at any time, avoid the bubble to arrange the not good condition of gas production waste water treatment to appear, a plurality of liquid outlets have been seted up to one side of casing 2, all there is drain pipe 5 through the bolt fastening in a plurality of liquid outlets, drain pipe 5 is convenient for carry out the layering flowing back to mixing waste water, casing 2's bottom outer wall has a plurality of backup pads 4 through the bolt fastening, and backup pad 4 evenly distributed, backup pad 4 supports fixedly casing 2, the condition of avoiding the device to produce vibrations because of work and take place the displacement appears.
The working principle is as follows: when the foam-drainage gas production wastewater in the shell 2 needs to be treated, firstly, the tubular aerator 3 is communicated with an external air pump, the external air pump is started, the motor 6 is started, then the demulsifier and the coagulant are added into the shell 2 through the dosing pipe 7, the motor 6 rotates to enable the first connecting shaft 10 to drive the stirring rod 11 to rotate, so that the stirring rod 11 primarily stirs and mixes the mixed wastewater, meanwhile, the first connecting shaft 10 rotates to enable the poking rod 18 to drive the sleeve 17 to rotate, when the sleeve 17 rotates to be in contact with the stress rod 15, the stress rod 15 rotates under the stress force to enable the second connecting shaft 14 to drive the spiral piece 16 to rotate, the torsion spring 13 deforms, when the sleeve 17 rotates to be out of contact with the stress rod 15, the torsion spring 13 rebounds and resets to enable the second connecting shaft 14 to drive the spiral piece 16 to rotate reversely, the spiral piece 16 rotates to push the mixed wastewater, so as to realize further stirring and mixing of the mixed wastewater, meanwhile, the external air pump generates compressed air, and the compressed air enters the mixed wastewater through the tubular aerator 3, so that the mixed wastewater is subjected to oxidative decomposition.
Example 2
Referring to fig. 1-4, an electrocatalytic oxidation treatment method for gas production wastewater of foam drainage comprises the following steps:
s1: a collecting tank, wherein the gas production sewage is collected and subjected to precipitation treatment;
s2: a homogeneous receiving pool, wherein the precipitated sewage is introduced into the homogeneous receiving pool, then free oil obtained from the upper part of the homogeneous receiving pool through gravity separation is recovered and enters a sump oil recovery tank for storage, and other foam drainage water is collected;
s3: coagulating sedimentation, namely introducing the treated foam drainage into a coagulation device for coagulation treatment;
s4: an electrolytic oxidation tank, wherein the treated sewage is led into the electrolytic tank, and then the electrolytic flocculation treatment is carried out under the action of direct current by taking metals such as aluminum, iron and the like as anodes;
s5: a buffer adjusting tank, wherein after the coagulating sedimentation, a regulator is added to adjust the PH value;
s6: the biochemical tank is used for introducing the wastewater regulated by the buffer regulating tank into the anaerobic tank for hydrolysis acidification treatment, and then introducing the wastewater into the aeration tank for twice aeration treatment, wherein the aeration time is 33 minutes, and the interval between the two times of aeration is 3 minutes;
s7: a sedimentation tank, wherein the sewage treated by the biochemical tank is introduced into the sedimentation tank, then activated carbon particles are added, then stirring is carried out for 18 minutes, and standing sedimentation is carried out for 1.5 hours after stirring;
s8: and the water purifying tank is used for discharging the settled wastewater to a filtering tank unit for filtering treatment to remove micro flocculates, and then hypochlorous acid is added for sterilization, wherein the filtering unit comprises a reverse osmosis treatment module.
In the invention, coagulant, demulsifier and softener are added during coagulation in S3, wherein the coagulant is any one of aluminum sulfate, polyaluminium chloride and polyaluminium-iron, flocculant is added during electrolysis in S4, the flocculant is any one of cationic polyacrylamide, anionic polyacrylamide and amphoteric polyacrylamide, colloidal impurities and suspended impurities in wastewater are coagulated, precipitated and separated through electrolysis, the flocculant not only has coagulation and precipitation effects on the colloidal impurities and the suspended impurities, but also can improve oxidation effect due to oxidation of an anode and reduction of a cathode, no residue is left, the effect is good, a regulator in S5 is any one of lime milk, caustic soda or dilute sulfuric acid and hydrochloric acid, one or more of pectinate, clostridium sporogenes, facultative anaerobe and bacillus atrophaeus are added in an anaerobic tank in S6, and high-salt-tolerant microbes are adopted to carry out biochemical treatment on bubble drainage, the treatment process is simple, the energy consumption is low, and various substances in the foam drainage can be treated more thoroughly.
It should be particularly noted that the coagulation device in S3 includes a housing 2, a first connecting shaft 10 is rotatably connected to the bottom inner wall of the housing 2, a stirring rod 11 is fixed to one side of the first connecting shaft 10 by bolts, the first connecting shaft 10 rotates to rotate the stirring rod 11, so as to primarily stir and mix the mixed wastewater, a motor 6 is fixed to the top outer wall of the housing 2 by bolts, one end of an output shaft of the motor 6 passes through the housing 2 and is fixed to the first connecting shaft 10, a poking rod 18 is fixed to both sides of the first connecting shaft 10 by bolts, a sleeve 17 is sleeved on the circumference outer side of the poking rod 18, a second connecting shaft 14 is rotatably connected to both side inner walls of the housing 2, a spiral piece 16 is fixed to the circumference outer side of the second connecting shaft 14 by bolts, a stress rod 15 is fixed to the top of the second connecting shaft 14 by bolts, and the stress rod 15 contacts the sleeve 17, torsional spring 13 has been cup jointed to the circumference outside of second connecting axle 14, and the both ends of torsional spring 13 are fixed mutually with second connecting axle 14 and casing 2 respectively, and poker rod 18 rotates and makes the atress pole 15 drive the flight 16 and rotate, and the flight 16 rotates and promotes mixed waste water, realizes mixing the stirring of mixed waste water.
Particularly, one side of the shell 2 is provided with an insertion hole, a tubular aerator 3 is inserted in the insertion hole, the tubular aerator 3 aerates the mixed wastewater, so that the mixed wastewater can obtain enough dissolved oxygen, and further, organic matters in the wastewater can be subjected to oxidative decomposition, two scraping plates 12 are fixed at the bottom of the first connecting shaft 10 through bolts, the scraping plates 12 are in contact with the shell 2, the scraping plates 12 can scrape off adhered matters at the bottom of the shell 2, the adhered matters are prevented from accumulating at the bottom of the shell 2 to influence the treatment effect of the mixed wastewater, the top of the shell 2 is respectively provided with a liquid inlet and a medicine feeding port, a liquid inlet pipe 1 and a medicine feeding pipe 7 are respectively fixed in the liquid inlet and the medicine feeding port through bolts, the bottom of the shell 2 is provided with a slag outlet, a slag outlet pipe 8 is fixed in the slag outlet through bolts, one side of the shell 2 is provided with a mounting port, and an observation window 9 is fixed in the mounting port through bolts, the observation window 9 can make things convenient for the staff to observe the condition of handling of bubble row gas production waste water at any time, avoid the bubble to arrange the not good condition of gas production waste water treatment to appear, a plurality of liquid outlets have been seted up to one side of casing 2, all there is drain pipe 5 through the bolt fastening in a plurality of liquid outlets, drain pipe 5 is convenient for carry out the layering flowing back to mixing waste water, casing 2's bottom outer wall has a plurality of backup pads 4 through the bolt fastening, and backup pad 4 evenly distributed, backup pad 4 supports fixedly casing 2, the condition of avoiding the device to produce vibrations because of work and take place the displacement appears.
The working principle is as follows: when the foam-drainage gas production wastewater in the shell 2 needs to be treated, firstly, the tubular aerator 3 is communicated with an external air pump, the external air pump is started, the motor 6 is started, then the demulsifier and the coagulant are added into the shell 2 through the dosing pipe 7, the motor 6 rotates to enable the first connecting shaft 10 to drive the stirring rod 11 to rotate, so that the stirring rod 11 primarily stirs and mixes the mixed wastewater, meanwhile, the first connecting shaft 10 rotates to enable the poking rod 18 to drive the sleeve 17 to rotate, when the sleeve 17 rotates to be in contact with the stress rod 15, the stress rod 15 rotates under the stress force to enable the second connecting shaft 14 to drive the spiral piece 16 to rotate, the torsion spring 13 deforms, when the sleeve 17 rotates to be out of contact with the stress rod 15, the torsion spring 13 rebounds and resets to enable the second connecting shaft 14 to drive the spiral piece 16 to rotate reversely, the spiral piece 16 rotates to push the mixed wastewater, so as to realize further stirring and mixing of the mixed wastewater, meanwhile, the external air pump generates compressed air, and the compressed air enters the mixed wastewater through the tubular aerator 3, so that the mixed wastewater is subjected to oxidative decomposition.
In the description herein, it is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An electrocatalytic oxidation treatment method for gas production wastewater of foam drainage is characterized by comprising the following steps:
s1: a collecting tank, wherein the gas production sewage is collected and subjected to precipitation treatment;
s2: a homogeneous receiving pool, wherein the precipitated sewage is introduced into the homogeneous receiving pool, then free oil obtained from the upper part of the homogeneous receiving pool through gravity separation is recovered and enters a sump oil recovery tank for storage, and other foam drainage water is collected;
s3: coagulating sedimentation, namely introducing the treated foam drainage into a coagulation device for coagulation treatment;
s4: an electrolytic oxidation tank, wherein the treated sewage is led into the electrolytic tank, and then the electrolytic flocculation treatment is carried out under the action of direct current by taking metals such as aluminum, iron and the like as anodes;
s5: a buffer adjusting tank, wherein after the coagulating sedimentation, a regulator is added to adjust the PH value;
s6: the biochemical tank is used for introducing the wastewater regulated by the buffer regulating tank into the anaerobic tank for hydrolysis acidification treatment, and then introducing the wastewater into the aeration tank for twice aeration treatment, wherein the aeration time is 20-40 minutes, and the interval between the two times of aeration is 1-5 minutes;
s7: a sedimentation tank, wherein the sewage treated by the biochemical tank is introduced into the sedimentation tank, then activated carbon particles are added, then stirring is carried out for 10-30 minutes, and standing sedimentation is carried out for 1-4 hours after stirring;
s8: and the water purifying tank is used for discharging the settled wastewater to a filtering tank unit for filtering treatment to remove micro flocculates, and then hypochlorous acid is added for sterilization, wherein the filtering unit comprises a reverse osmosis treatment module.
2. The electrocatalytic oxidation treatment method for gas production wastewater of foaming row as set forth in claim 1, wherein coagulant, demulsifier and softener are added during coagulation in S3, coagulant is any one of aluminum sulfate, polyaluminium chloride and polyaluminium-iron.
3. The electrocatalytic oxidation treatment method for gas production wastewater from bubble drainage according to claim 2, wherein a flocculant is added during electrolysis in S4, and the flocculant is any one of cationic polyacrylamide, anionic polyacrylamide and amphoteric polyacrylamide.
4. The electrocatalytic oxidation treatment method for gas production wastewater from foaming drainage as recited in claim 1, wherein the conditioning agent in S5 is any one of lime milk, caustic soda or dilute sulfuric acid, hydrochloric acid.
5. The method as claimed in claim 1, wherein one or more of Pectinatus brassicae, Clostridium sporogenes, facultative anaerobes and Bacillus atrophaeus are added into the anaerobic tank of S6.
6. The electrocatalytic oxidation treatment method for the gas production wastewater from the bubble column according to claim 1, wherein the coagulation device in S3 comprises a housing (2), a first connecting shaft (10) is movably connected to the inner wall of the bottom of the housing (2), a stirring rod (11) is fixedly connected to one side of the first connecting shaft (10), a motor (6) is fixedly connected to the outer wall of the top of the housing (2), one end of an output shaft of the motor (6) passes through the housing (2) to be fixed to the first connecting shaft (10), poking rods (18) are fixedly connected to both sides of the first connecting shaft (10), sleeves (17) are movably connected to the outer sides of the circumferences of the poking rods (18), a second connecting shaft (14) is movably connected to the inner walls of both sides of the housing (2), and spiral pieces (16) are fixedly connected to the outer sides of the circumferences of the second connecting shaft (14), the top fixedly connected with atress pole (15) of second connecting axle (14), and atress pole (15) contact with sleeve (17), the circumference outside swing joint of second connecting axle (14) has torsional spring (13), and the both ends of torsional spring (13) are fixed mutually with second connecting axle (14) and casing (2) respectively.
7. The electrocatalytic oxidation treatment method for gas production wastewater in bubbling rows according to claim 6, wherein a jack is formed in one side of the housing (2), the tubular aerator (3) is fixedly connected in the jack, two scrapers (12) are fixedly connected to the bottom of the first connecting shaft (10), and the scrapers (12) are in contact with the housing (2).
8. The electrocatalytic oxidation treatment method for the foam-exhaust gas production wastewater according to claim 6, wherein a liquid inlet and a chemical feeding port are respectively formed in the top of the housing (2), a liquid inlet pipe (1) and a chemical feeding pipe (7) are respectively and fixedly connected in the liquid inlet and the chemical feeding port, a slag outlet is formed in the bottom of the housing (2), a slag outlet pipe (8) is fixedly connected in the slag outlet, a mounting port is formed in one side of the housing (2), and an observation window (9) is fixedly connected in the mounting port.
9. The electrocatalytic oxidation treatment method for gas production wastewater with bubbling drainage according to claim 6, wherein a plurality of liquid outlets are formed in one side of the housing (2), liquid outlet pipes (5) are fixedly connected in the plurality of liquid outlets, a plurality of support plates (4) are fixedly connected to the outer wall of the bottom of the housing (2), and the support plates (4) are uniformly distributed.
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