CN114057320A - Waste slurry gel breaking treatment method - Google Patents
Waste slurry gel breaking treatment method Download PDFInfo
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- CN114057320A CN114057320A CN202111267392.4A CN202111267392A CN114057320A CN 114057320 A CN114057320 A CN 114057320A CN 202111267392 A CN202111267392 A CN 202111267392A CN 114057320 A CN114057320 A CN 114057320A
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- breaking treatment
- waste slurry
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- 239000002002 slurry Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002699 waste material Substances 0.000 title claims abstract description 17
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 39
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 10
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 10
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 10
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims description 34
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 15
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 10
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 5
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 5
- 239000006004 Quartz sand Substances 0.000 claims description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 abstract description 7
- 229910000360 iron(III) sulfate Inorganic materials 0.000 abstract description 7
- 239000001509 sodium citrate Substances 0.000 abstract description 6
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 abstract description 6
- 239000002738 chelating agent Substances 0.000 abstract description 3
- 230000001687 destabilization Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 6
- 229910010293 ceramic material Inorganic materials 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 20
- 239000012530 fluid Substances 0.000 description 17
- 239000000126 substance Substances 0.000 description 11
- 239000003921 oil Substances 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 6
- 235000019198 oils Nutrition 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 239000000084 colloidal system Substances 0.000 description 4
- 239000008394 flocculating agent Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000001124 (E)-prop-1-ene-1,2,3-tricarboxylic acid Substances 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- AYKYXWQEBUNJCN-UHFFFAOYSA-N 3-methylfuran-2,5-dione Chemical compound CC1=CC(=O)OC1=O AYKYXWQEBUNJCN-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229940091181 aconitic acid Drugs 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- GTZCVFVGUGFEME-IWQZZHSRSA-N cis-aconitic acid Chemical compound OC(=O)C\C(C(O)=O)=C\C(O)=O GTZCVFVGUGFEME-IWQZZHSRSA-N 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- GTZCVFVGUGFEME-UHFFFAOYSA-N trans-aconitic acid Natural products OC(=O)CC(C(O)=O)=CC(O)=O GTZCVFVGUGFEME-UHFFFAOYSA-N 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000002351 wastewater 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
-
- 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
- C02F1/722—Oxidation by peroxides
-
- 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
-
- 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
Abstract
The invention relates to the technical field of environmental protection, in particular to a waste slurry gel breaking treatment method, which comprises the following steps: s1, adding water for dilution; s2, adding citric acid and sodium hydroxide; s3, adding hydrogen peroxide and sulfuric acid; s4, adding ferrous sulfate; and S5, adding activated fine sand. The invention relates to a method for preparing a high-temperature-resistant ceramic material. According to the invention, through the reaction of citric acid and sodium hydroxide, a large amount of heat is generated, so that the subsequent treatment can be better carried out, meanwhile, sodium citrate can be generated to be used as a chelating agent, and in addition, by adding hydrogen peroxide, sulfuric acid and ferrous sulfate, polymeric ferric sulfate is generated, so that on one hand, gel breaking and destabilization can be carried out, and on the other hand, water quality can be purified.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a waste slurry gel breaking treatment method.
Background
In the drilling process of oil and gas fields, drilling fluid is widely used to play roles in carrying and suspending rock debris, protecting walls, cooling, lubricating drilling tools and the like. In the drilling process, people can adjust the rheological property of the drilling fluid at any time by adding bentonite and a dispersing agent or adding a large amount of organic high molecular substances such as mineral oil, vegetable oil, crude oil, carboxymethyl cellulose, polyacrylamide, sulfonated asphalt, sulfonated phenolic resin and the like as a tackifier, a filtrate reducer, a lubricant and the like according to different stratum structures and depths drilled by the drilling fluid. The drilling fluid is a very complex dispersion system which is based on bentonite and water (or oil) and is dispersed by various chemical additives to form a stable dispersion system, the particle size of the stable dispersion system is generally between 2 microns and 100 microns, and the stable dispersion system has colloidal characteristics and quite stability.
Due to the introduction of various additives, as well as drill cuttings and formation minerals, the waste drilling fluid is in a slurry state, and contains various harmful substances, such as salts with potential toxic effects on organisms and heavy metal elements, which are typical hazardous wastes. The pollutants in the waste drilling fluid are extremely high in load and in a colloid state, and become a special stable system under the action of the protective colloid of the drilling fluid, and can not be precipitated in a water body for a long time, so that the ecological damage of the water body is caused, and the function of the water body is influenced.
When adopting prior art to carry out the rubber breaking to abandonment drilling fluid and handling, when the ambient temperature that is located is lower, in the abandonment drilling fluid such as grease, the interior material of pitch can solidify under the low temperature state, this makes when follow-up adding water to the abandonment drilling fluid and diluting, the abandonment drilling fluid can become the cubic solid matter of dispersion and float on the surface of water, need consume a large amount of energy this moment and heat the mixture of abandonment drilling fluid and water to let the solid matter mostly melt, consequently, the treatment cost is higher.
Disclosure of Invention
The invention aims to solve the problem that waste drilling fluid is inconvenient to treat at a lower temperature in the prior art, and provides a waste mud gel breaking treatment method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a waste slurry gel breaking treatment method is designed, and comprises the following steps:
s1, adding water to dilute the slurry to obtain a first mixture;
s2, adding citric acid into the mixture, uniformly stirring, then adding sodium bicarbonate, uniformly stirring, and then waiting for reaction for 3-4 minutes to obtain a second mixture;
s3, adding hydrogen peroxide and sulfuric acid into the second mixture, uniformly stirring, and waiting for reaction for 2-5 minutes to obtain a third mixture;
s4, adding ferrous sulfate into the third mixture, and uniformly stirring to obtain a fourth mixture;
and S5, adding the activated fine sand into the fourth mixture, and uniformly stirring.
Optionally, the volume ratio of water to mud in the step 1 is controlled to be 2: 1.
Optionally, in the step 2, the mass ratio of the citric acid to the sodium bicarbonate to the first mixture is 1:3: 10.
Optionally, the volume ratio of the hydrogen peroxide, the sulfuric acid and the second mixture in the step 3 is controlled to be 5:6: 25.
Optionally, the mass ratio of the third mixture to the ferrous sulfate in the step 4 is controlled to be 20: 5.
Optionally, the activated fine sand in step 5 is obtained by screening river sand or quartz sand to 50 μm to 500 μm in size, and then washing with an alkali solution and clear water.
The waste slurry gel breaking treatment method provided by the invention has the beneficial effects that: according to the invention, citric acid and sodium bicarbonate are added and react with each other, so that on one hand, sodium citrate can be produced and can be used as a relatively good heavy metal chelating agent, and on the other hand, a large amount of heat is generated in the reaction process, so that the solidified oil and fat substances in the slurry are melted, and the subsequent reaction is facilitated;
secondly, ferrous sulfate, hydrogen peroxide, sulfuric acid and the like are added and react with each other to generate polymeric ferric sulfate, a large amount of H + ions are generated after the hydrolysis reaction of the polymeric ferric sulfate, the H + ions are combined with active carboxyl generated by the oxidation of high molecular organic matters in the drilling fluid after repeated recycling and under the conditions of high temperature and high pressure, the self-emulsification of the colloidal substances and the high molecular organic matters in the drilling fluid is lost, and the gel breaking and the destabilization are generated;
and finally, adding activated fine sand, wherein the surface of the activated fine sand can adsorb free high-molecular organic matters, solid particles, clay, drill cuttings and the like released after gel breaking, and the activated fine sand is used as a flocculation core to rapidly increase, so that an original colloid system can be differentiated into a solid-phase substance taking the fine sand as a core and a liquid-phase component containing high-viscosity organic high-molecular substances (oils and the like), and further the solid-liquid separation is realized by a mechanical method.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example 1
An embodiment of the invention provides a waste slurry gel breaking treatment method, which comprises the following steps:
and S1, adding water to dilute the slurry to obtain a first mixture, wherein the volume ratio of the water to the slurry is controlled to be 2: 1.
And S2, adding citric acid into the first mixture, uniformly stirring, then adding sodium bicarbonate, uniformly stirring, and then waiting for the reaction for 3-4 minutes to obtain a second mixture.
Wherein the mass ratio of the citric acid to the sodium bicarbonate to the first mixture is 1:3: 10.
The reaction of citric acid and sodium bicarbonate can generate a large amount of heat, and sodium citrate is generated at the same time, and is used as a chelating agent/complexing agent in the method, so that the sodium citrate has good complexing capability on heavy metal ions contained in the slurry. It also has the following advantages: (1) safe and nontoxic. (2) Has biodegradability. After being diluted by a large amount of water in the nature, the sodium citrate is partially changed into citric acid, and the sodium citrate and the citric acid coexist in the same system. Citric acid is readily biodegradable in water by the action of oxygen, heat, light, bacteria and microorganisms. The decomposition pathway is generally via aconitic acid, itaconic acid, citraconic anhydride, to carbon dioxide and water. (3) Excellent solubility properties and solubility increases with increasing water temperature.
And S3, adding hydrogen peroxide and sulfuric acid into the second mixture, uniformly stirring, and waiting for reaction for 2-5 minutes to obtain a third mixture.
Wherein the volume ratio of the hydrogen peroxide to the sulfuric acid to the second mixture is controlled to be 5:6: 25; the strong oxidant H2O2 (hydrogen peroxide) oxidizes organic matters to reduce COD, and also oxidizes substances containing heavy metals to dissociate heavy metal ions from the organic matters.
And S4, adding ferrous sulfate into the third mixture, and uniformly stirring to obtain a fourth mixture.
Wherein the mass ratio of the third mixture to the ferrous sulfate is controlled to be 20: 5; ferrous sulfate is used for flocculation purification of water and removal of phosphate from municipal and industrial sewage to prevent eutrophication of water bodies.
Hydrogen peroxide (H2O2) is a strong oxidant in acidic environments and can oxidize ferrous iron to ferric iron to produce polymeric ferric sulfate: 2FeSO4+ H2O2+ (1-n/2) H2SO 4-to produce polymeric ferric sulphate: eutrophication of the soil. And the action of microorganisms, and are easy to grow.
The generated polymeric ferric sulfate generates a large amount of H + ions after hydrolysis reaction, the H + ions are combined with active carboxyl generated by oxidizing high molecular organic matters in the drilling fluid after repeated recycling and under the conditions of high temperature and high pressure, the self-emulsification of the colloidal substances and the high molecular organic matters in the drilling fluid is lost, and gel breaking and destabilization occur. Meanwhile, the polymeric ferric sulfate has the characteristics of strong adaptability, capability of removing emulsified oil, dissolved oil and part of complex macromolecular organic matters which are difficult to biochemically degrade, and is widely applied to the treatment of oily wastewater.
The commonly used flocculating agents mainly comprise three categories of inorganic flocculating agents, organic flocculating agents and composite flocculating agents. The polymeric ferric sulfate in the inorganic polymeric flocculant has good treatment effect as a lower molecular weight inorganic flocculant, low price, small dosage and high efficiency, and is widely applied.
And S5, adding the activated fine sand into the fourth mixture, and uniformly stirring.
The activated fine sand is obtained by screening river sand or quartz sand to 50-500 μm, and washing with alkali solution and clear water. The surface of the activated fine sand can adsorb free high molecular organic matters, solid particles, clay, drill cuttings and the like released after gel breaking, and the activated fine sand is used as a flocculation core to rapidly increase, so that an original colloid system can be differentiated into a solid phase substance taking the fine sand as a core and a liquid phase component containing high-viscosity organic high molecular substances (oils and the like), and further solid-liquid separation is realized by a mechanical method.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The waste slurry gel breaking treatment method is characterized by comprising the following steps:
s1, adding water to dilute the slurry to obtain a first mixture;
s2, adding citric acid into the mixture, uniformly stirring, then adding sodium bicarbonate, uniformly stirring, and then waiting for reaction for 3-4 minutes to obtain a second mixture;
s3, adding hydrogen peroxide and sulfuric acid into the second mixture, uniformly stirring, and waiting for reaction for 2-5 minutes to obtain a third mixture;
s4, adding ferrous sulfate into the third mixture, and uniformly stirring to obtain a fourth mixture;
and S5, adding the activated fine sand into the fourth mixture, and uniformly stirring.
2. The waste slurry gel breaking treatment method according to claim 1, wherein the volume ratio of water to slurry in the step 1 is controlled to be 2: 1.
3. The waste slurry gel breaking treatment method according to claim 1, wherein the mass ratio of the citric acid, the sodium bicarbonate and the first mixture in the step 2 is 1:3: 10.
4. The waste slurry gel breaking treatment method according to claim 1, wherein the volume ratio of the hydrogen peroxide solution to the sulfuric acid to the second mixture in the step 3 is controlled to be 5:6: 25.
5. The waste slurry gel breaking treatment method according to claim 1, wherein the mass ratio of the third mixture to the ferrous sulfate in the step 4 is controlled to be 20: 5.
6. the waste mud gel breaking treatment method according to any one of claims 1 to 5, wherein the activated fine sand in the step 5 is obtained by screening river sand or quartz sand to 50 μm to 500 μm in size and then washing the sand with an alkali solution and clean water.
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|---|---|---|---|
| CN202111267392.4A CN114057320A (en) | 2021-10-29 | 2021-10-29 | Waste slurry gel breaking treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267392.4A CN114057320A (en) | 2021-10-29 | 2021-10-29 | Waste slurry gel breaking treatment method |
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| CN114057320A true CN114057320A (en) | 2022-02-18 |
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| CN202111267392.4A Pending CN114057320A (en) | 2021-10-29 | 2021-10-29 | Waste slurry gel breaking treatment method |
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| CN109956648A (en) * | 2019-04-26 | 2019-07-02 | 西安石油大学 | A method of the waste drilling mud coupled is aggravated with dirt absorption based on Fenton oxidation unstability and is dehydrated |
| CN110318696A (en) * | 2019-06-25 | 2019-10-11 | 河南省地质矿产勘查开发局第四地质矿产调查院 | Harmless treatment process for water-based waste drilling fluid |
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2021
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Application publication date: 20220218 |