CN110921936A - Method for treating high-oil-quantity sewage - Google Patents
Method for treating high-oil-quantity sewage Download PDFInfo
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- CN110921936A CN110921936A CN201911285173.1A CN201911285173A CN110921936A CN 110921936 A CN110921936 A CN 110921936A CN 201911285173 A CN201911285173 A CN 201911285173A CN 110921936 A CN110921936 A CN 110921936A
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- 239000010865 sewage Substances 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 239000008213 purified water Substances 0.000 claims abstract description 15
- 239000002957 persistent organic pollutant Substances 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000006731 degradation reaction Methods 0.000 claims abstract description 9
- 230000001590 oxidative effect Effects 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000008394 flocculating agent Substances 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- 238000007667 floating Methods 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- 239000005416 organic matter Substances 0.000 claims description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 229920001732 Lignosulfonate Polymers 0.000 claims description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 52
- 235000019198 oils Nutrition 0.000 description 50
- -1 hydroxyl radicals Chemical class 0.000 description 7
- 239000003208 petroleum Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005504 petroleum refining Methods 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical class C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 235000019871 vegetable fat Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Classifications
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/52—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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
-
- 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
Landscapes
- 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)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a method for treating high-oil-content sewage, which specifically comprises the following steps: step 1, introducing sewage into a grit chamber, adding a flocculating agent, standing and precipitating to obtain primarily treated sewage; step 2, adding a demulsifier, introducing the sewage into a pipeline mixer, and fully mixing; step 3, carrying out spraying and dispersing treatment on the sewage by using a high-pressure homogenizer, and introducing ozone to obtain deeply treated sewage; step 4, introducing the sewage subjected to the advanced treatment into an oil-water separator, and discharging the purified water through a water outlet; and step 5, adding a pH regulator, and filtering to obtain recyclable water, wherein the method utilizes the characteristics that the specific gravity of emulsified oil in the sewage of the oil-gas field is small, and the strong oxidizing property of hydroxyl radicals generated under the irradiation of ozone and ultraviolet light is adopted to quickly react with organic pollutants in the sewage, so that the effective and quick degradation of most organic pollutants can be realized, and the purposes of quick demulsification and sewage purification are realized.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and relates to a method for treating high-oil-amount sewage.
Background
With the continuous improvement of industrial level and the continuous increase of urban population, the rapid development of economy and the simultaneous influence on urban living quality are achieved, the current sewage causes certain interference on living environment and living quality, the sewage contains a large amount of harmful substances such as ammonia gas, benzene series, naphthalene series, anthraquinone, aniline and benzidine compounds, chlorine and the like, and the sewage is chelated with metal, salt and other substances in the production process, so that the dye wastewater contains salt, chloride or bromide.
In particular, for sewage generated in petrochemical processing, the content of oil slick, emulsified oil and dissolved oil in the sewage is high, and a large amount of suspended organic matters are mixed in the sewage, and the components of the suspended organic matters often contain substances with poor degradability such as phenol, aldehyde, alcohol, alkane, halogenated hydrocarbon and the like, so that the treatment difficulty of the sewage with high oil content is greatly increased, hidden troubles can be buried in the health of people in the environment for a long time of life, and the influence on the quality of life can be generated.
Disclosure of Invention
The invention aims to provide a method for treating high-oil-amount sewage, which solves the problem that oil in sewage is difficult to treat in the prior art.
The technical scheme adopted by the invention is that the treatment method of the high-oil-quantity sewage is specifically carried out according to the following steps:
step 1, introducing sewage into a grit chamber, removing solid matters through a mechanical grid in the grit chamber, adding a flocculating agent, standing for precipitation, and removing large-particle colloidal substances in the sewage to obtain primarily treated sewage;
step 2, adding a demulsifier into the primarily treated sewage, and introducing the sewage into a pipeline mixer for fully mixing;
step 3, spraying and dispersing the sewage by using a high-pressure homogenizer, introducing ozone into the sewage to perform organic matter degradation reaction with organic pollutants in the sewage by utilizing the strong oxidizing property of hydroxyl radicals generated under the ozone and ultraviolet light to obtain the sewage subjected to advanced treatment;
step 4, introducing the sewage subjected to the advanced treatment into an oil-water separator, discharging the floating oil through an oil receiving port at regular intervals, and discharging the purified water through a water outlet;
and 5, adding a pH regulator into the purified water, regulating the pH to be neutral, and filtering to obtain recyclable water.
In the step 1, the flocculating agent is any one of lignosulfonate, acrylic acid or methacrylic acid.
In the step 1, the flocculant accounts for 1-2% of the sewage content, and the standing time is 6-12 h.
In the step 2, the demulsifier is a clear oil demulsifier, and the content of the demulsifier is 1-5 mg/L.
In step 3, the homogenizing pressure of the high-pressure homogenizer is 50000-60000 psi, and the injection speed is 350-400 m/s.
In step 3, the dosage of ozone is 2-5 g/m3。
In the step 5, the pH regulator is sodium hydroxide or hydrochloric acid, and the pH regulator is 6.5-7.5.
The invention has the advantages that the specific gravity of emulsified oil in oil and gas field sewage is small, the strong oxidizing property of hydroxyl free radicals generated under the irradiation of ozone and ultraviolet light is adopted to quickly react with organic pollutants in the sewage and destroy benzene rings, the effective and quick degradation of most organic pollutants can be realized, the purposes of quick emulsion breaking and sewage purification are realized, the sewage treatment effect is further improved, the solid residual amount is small, the invention is suitable for various environments with high content of emulsified oil and emulsified water, the working condition time is shortened, the time cost is reduced, and the economic cost is saved.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
A method for treating high-oil-content sewage specifically comprises the following steps:
step 1, introducing sewage into a grit chamber, removing solid matters through a mechanical grid in the grit chamber, adding a flocculating agent, standing for precipitation, and removing large-particle colloidal substances in the sewage to obtain primarily treated sewage;
step 2, adding a demulsifier into the primarily treated sewage, and introducing the sewage into a pipeline mixer for fully mixing;
step 3, spraying and dispersing the sewage by using a high-pressure homogenizer, introducing ozone into the sewage to perform organic matter degradation reaction with organic pollutants in the sewage by utilizing the strong oxidizing property of hydroxyl radicals generated under the ozone and ultraviolet light to obtain the sewage subjected to advanced treatment;
step 4, introducing the sewage subjected to the advanced treatment into an oil-water separator, discharging the floating oil through an oil receiving port at regular intervals, and discharging the purified water through a water outlet;
and 5, adding a pH regulator into the purified water, regulating the pH to be neutral, and filtering to obtain recyclable water.
In the step 1, the flocculating agent is any one of lignosulfonate, acrylic acid or methacrylic acid.
In the step 1, the flocculant accounts for 1-2% of the sewage content, and the standing time is 6-12 h.
In the step 2, the demulsifier is a clear oil demulsifier, and the content of the demulsifier is 1-5 mg/L.
In step 3, the homogenizing pressure of the high-pressure homogenizer is 50000-60000 psi, and the injection speed is 350-400 m/s.
In step 3, the dosage of ozone is 2-5 g/m3。
In the step 5, the pH regulator is sodium hydroxide or hydrochloric acid, and the pH regulator is 6.5-7.5.
The oil-containing waste water in petroleum industry is mainly from the processes of petroleum exploitation, petroleum refining, petrochemical industry and the like. The waste water in the oil exploitation process mainly comes from the separation water of crude oil with water, equipment washing water in the drilling and lifting process, ground precipitation of well sites and oil tank areas and the like. The oil-containing waste water of petroleum refining and petrochemical industry mainly comes from the oil-water separation process of a production device and the washing and flushing processes of oil products and equipment. The oily coking wastewater discharged from the solid fuel thermal processing industry mainly comes from condensed water of coke oven gas, coal washing gas water, drainage of various storage tanks and the like.
Wastewater containing oily substances discharged in the industrial production process. The oil substances contained in the oily wastewater comprise natural petroleum, petroleum products, tar and fractions thereof, and edible animal and vegetable oils and fats. The pollution to water is mainly petroleum and tar. The waste water discharged from different industrial sectors contains oil substances with widely different concentrations, which are generally present in the waste water in three states: the oil product has larger dispersed particles in the wastewater, the particle size is more than 100 mu m, the oil product is easy to separate from the wastewater, and in petroleum sewage, the oil accounts for 60-80% of the total oil content in the water; the dispersed particle size of the oil product in the wastewater is small, the oil product is in an emulsified state, and the oil product is not easy to separate from the wastewater; a small part of oil products are in a dissolved state, and floating oil or heavy oil is recovered from oily wastewater by using an oil separation tank.
The emulsified oil treated by the method is an oil substance which is difficult to separate from the waste water even if the oily waste water is kept stand for a long time and can be separated only after being converted into floating oil through demulsification treatment, and the oil substance in the state is difficult to separate from the waste water because the surface of oil drops is provided with a stable film formed by an emulsifier, so that the oil drops are prevented from being combined.
Example 1
A method for treating high-oil-content sewage specifically comprises the following steps:
step 1, introducing sewage into a grit chamber, removing solid matters through a mechanical grid in the grit chamber, then adding lignosulfonate accounting for 1.5% of the sewage content, standing and precipitating for 8 hours, and removing large-particle colloidal substances in the sewage to obtain primarily treated sewage;
step 2, adding a clear oil demulsifier into the primarily treated sewage, wherein the content of the demulsifier is 4mg/L, and introducing the sewage into a pipeline mixer for fully mixing;
step 3, spraying and dispersing the sewage by using a high-pressure homogenizer, wherein the homogenizing pressure of the high-pressure homogenizer is 56000psi, the spraying speed is 360m/s, the sewage is atomized, and simultaneously ozone is introduced, and the adding amount of the ozone is 4g/m3Carrying out organic matter degradation reaction with organic pollutants in the wastewater by utilizing the strong oxidizing property of hydroxyl radicals generated under ozone and ultraviolet light to obtain deeply treated sewage;
step 4, introducing the sewage subjected to the advanced treatment into an oil-water separator, discharging the floating oil through an oil receiving port at regular intervals, and discharging the purified water through a water outlet;
and 5, adding a pH regulator, namely sodium hydroxide or hydrochloric acid, into the purified water to regulate the pH to 7, and filtering to obtain recyclable water.
Example 2
A method for treating high-oil-content sewage specifically comprises the following steps:
step 1, introducing sewage into a grit chamber, removing solid matters through a mechanical grid in the grit chamber, adding acrylic acid accounting for 2% of the sewage content, standing and precipitating for 6 hours, and removing large-particle colloidal matters in the sewage to obtain primarily treated sewage;
step 2, adding a clear oil demulsifier into the primarily treated sewage, wherein the content of the demulsifier is 5mg/L, and introducing the sewage into a pipeline mixer for fully mixing;
step 3, spraying and dispersing the sewage by using a high-pressure homogenizer, wherein the homogenizing pressure of the high-pressure homogenizer is 50000psi, the spraying speed is 400m/s, the sewage forms a fog shape, and simultaneously ozone is introduced, and the adding amount of the ozone is 2g/m3Carrying out organic matter degradation reaction with organic pollutants in the wastewater by utilizing the strong oxidizing property of hydroxyl radicals generated under ozone and ultraviolet light to obtain deeply treated sewage;
step 4, introducing the sewage subjected to the advanced treatment into an oil-water separator, discharging the floating oil through an oil receiving port at regular intervals, and discharging the purified water through a water outlet;
and 5, adding a pH regulator, namely sodium hydroxide or hydrochloric acid, into the purified water to regulate the pH to 7.5, and filtering to obtain recyclable water.
Example 3
A method for treating high-oil-content sewage specifically comprises the following steps:
step 1, introducing sewage into a grit chamber, removing solid matters through a mechanical grid in the grit chamber, then adding methacrylic acid accounting for 1% of the sewage content, standing and precipitating for 12 hours, and removing large-particle colloidal matters in the sewage to obtain primarily treated sewage;
step 2, adding a clear oil demulsifier into the primarily treated sewage, wherein the content of the demulsifier is 1mg/L, and introducing the sewage into a pipeline mixer for fully mixing;
step 3, spraying and dispersing the sewage by using a high-pressure homogenizer, wherein the homogenizing pressure of the high-pressure homogenizer is 60000psi, the spraying speed is 350m/s, the sewage forms a fog shape, and simultaneously ozone is introduced, and the adding amount of the ozone is 5g/m3Strong oxygen utilizing hydroxyl radicals generated by ozone and ultraviolet lightPerforming chemical degradation reaction with organic pollutants in the wastewater to obtain advanced treated sewage;
step 4, introducing the sewage subjected to the advanced treatment into an oil-water separator, discharging the floating oil through an oil receiving port at regular intervals, and discharging the purified water through a water outlet;
and 5, adding a pH regulator, namely sodium hydroxide or hydrochloric acid, into the purified water to regulate the pH to 6.5, and filtering to obtain recyclable water.
Example 4
A method for treating high-oil-content sewage specifically comprises the following steps:
step 1, introducing sewage into a grit chamber, removing solid matters through a mechanical grid in the grit chamber, adding acrylic acid accounting for 1% of the sewage content, standing and precipitating for 10 hours, and removing large-particle colloidal matters in the sewage to obtain primarily treated sewage;
step 2, adding a clear oil demulsifier into the primarily treated sewage, wherein the content of the demulsifier is 5mg/L, and introducing the sewage into a pipeline mixer for fully mixing;
step 3, spraying and dispersing the sewage by using a high-pressure homogenizer, wherein the homogenizing pressure of the high-pressure homogenizer is 50000psi, the spraying speed is 390m/s, the sewage forms a fog shape, and simultaneously ozone is introduced, and the adding amount of the ozone is 5g/m3Carrying out organic matter degradation reaction with organic pollutants in the wastewater by utilizing the strong oxidizing property of hydroxyl radicals generated under ozone and ultraviolet light to obtain deeply treated sewage;
step 4, introducing the sewage subjected to the advanced treatment into an oil-water separator, discharging the floating oil through an oil receiving port at regular intervals, and discharging the purified water through a water outlet;
and 5, adding a pH regulator, namely sodium hydroxide or hydrochloric acid, into the purified water to regulate the pH to 7, and filtering to obtain recyclable water.
The invention utilizes the small specific gravity of emulsified oil in oil and gas field sewage, adopts the strong oxidizing property of hydroxyl free radical generated under the irradiation of ozone and ultraviolet light, and can quickly react with organic pollutants in the sewage to destroy benzene rings and the like, thereby realizing the effective and quick degradation of most organic pollutants, realizing the purposes of quick emulsion breaking and sewage purification, further improving the sewage treatment effect, having small solid residual amount, being suitable for various environments with high content of emulsified oil and emulsified water, shortening the working condition time, reducing the time cost and saving the economic cost.
Claims (7)
1. A method for treating high-oil-amount sewage is characterized by comprising the following steps:
step 1, introducing sewage into a grit chamber, removing solid matters through a mechanical grid in the grit chamber, adding a flocculating agent, standing for precipitation, and removing large-particle colloidal substances in the sewage to obtain primarily treated sewage;
step 2, adding a demulsifier into the primarily treated sewage, and introducing the sewage into a pipeline mixer for fully mixing;
step 3, spraying and dispersing the sewage by using a high-pressure homogenizer, introducing ozone into the sewage to perform organic matter degradation reaction with organic pollutants in the sewage by utilizing the strong oxidizing property of hydroxyl radicals generated under the ozone and ultraviolet light to obtain the sewage subjected to advanced treatment;
step 4, introducing the sewage subjected to the advanced treatment into an oil-water separator, discharging the floating oil through an oil receiving port at regular intervals, and discharging the purified water through a water outlet;
and 5, adding a pH regulator into the purified water, regulating the pH to be neutral, and filtering to obtain recyclable water.
2. The method for treating high oil amount wastewater according to claim 1, wherein the flocculating agent is any one of lignosulfonate, acrylic acid or methacrylic acid in the step 1.
3. The method for treating high-oil sewage according to claim 1, wherein in the step 1, the flocculant accounts for 1-2% of the sewage content, and the standing time is 6-12 h.
4. The method for treating high oil content sewage according to claim 1, wherein in the step 2, the demulsifier is a boiled oil demulsifier, and the content of the demulsifier is 1-5 mg/L.
5. The method for treating high-oil wastewater according to claim 1, wherein in the step 3, the homogenizing pressure of the high-pressure homogenizer is 50000-60000 psi, and the injection speed is 350-400 m/s.
6. The method for treating high-oil-amount sewage according to claim 1, wherein the amount of ozone added in step 3 is 2-5 g/m3。
7. The method for treating high-oil-content sewage according to claim 1, wherein in the step 5, the pH regulator is sodium hydroxide or hydrochloric acid, and the pH is 6.5-7.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911285173.1A CN110921936A (en) | 2019-12-13 | 2019-12-13 | Method for treating high-oil-quantity sewage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911285173.1A CN110921936A (en) | 2019-12-13 | 2019-12-13 | Method for treating high-oil-quantity sewage |
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| CN110921936A true CN110921936A (en) | 2020-03-27 |
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| CN201911285173.1A Pending CN110921936A (en) | 2019-12-13 | 2019-12-13 | Method for treating high-oil-quantity sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314904A (en) * | 2021-12-11 | 2022-04-12 | 国网湖北省电力有限公司电力科学研究院 | Combined sewage treatment system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043829A (en) * | 2013-01-05 | 2013-04-17 | 中国石油大学(北京) | Method and device for pretreating thickened oil refining sewage |
| CN107082509A (en) * | 2017-05-10 | 2017-08-22 | 上海理工大学 | A kind of high purification method containing emulsifying greasy dirt water |
| CN108689531A (en) * | 2018-05-28 | 2018-10-23 | 成都新柯力化工科技有限公司 | A method of processing high concentrtion printing and dyeing organic sewage |
| CN110467297A (en) * | 2019-08-15 | 2019-11-19 | 河南省化工研究所有限责任公司 | A kind of processing method of emulsified fluorescent penetrant oil waste water |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043829A (en) * | 2013-01-05 | 2013-04-17 | 中国石油大学(北京) | Method and device for pretreating thickened oil refining sewage |
| CN107082509A (en) * | 2017-05-10 | 2017-08-22 | 上海理工大学 | A kind of high purification method containing emulsifying greasy dirt water |
| CN108689531A (en) * | 2018-05-28 | 2018-10-23 | 成都新柯力化工科技有限公司 | A method of processing high concentrtion printing and dyeing organic sewage |
| CN110467297A (en) * | 2019-08-15 | 2019-11-19 | 河南省化工研究所有限责任公司 | A kind of processing method of emulsified fluorescent penetrant oil waste water |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114314904A (en) * | 2021-12-11 | 2022-04-12 | 国网湖北省电力有限公司电力科学研究院 | Combined sewage treatment system and method |
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