CN101269888A - Solid-liquid separation technique for waste slurry of water-based system artesian well - Google Patents
Solid-liquid separation technique for waste slurry of water-based system artesian well Download PDFInfo
- Publication number
- CN101269888A CN101269888A CNA2008100443837A CN200810044383A CN101269888A CN 101269888 A CN101269888 A CN 101269888A CN A2008100443837 A CNA2008100443837 A CN A2008100443837A CN 200810044383 A CN200810044383 A CN 200810044383A CN 101269888 A CN101269888 A CN 101269888A
- Authority
- CN
- China
- Prior art keywords
- solid
- liquid separation
- based system
- water
- mud
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a solid and liquid separation technique of water based system well drilling waste slurry, which includes the procedures that: (1) slurry preparation, water or well drilling wastewater is added to adjust the density of the water based system well drilling waste slurry not to be more than 1.20 g/cm<3>; (2) acidification and gelout, gel breaker sulphuric acid is added to adjust the pH value of the waste slurry after the density is adjusted not to be more than 5, and the acidification and gelout and stability elimination reaction are performed; (3) solid and liquid separation, the waste slurry liquid after being performed the full acidification and gelout and stability elimination reaction is fed into a solid and liquid separation device for the solid and liquid separation, so as to cause the solid phase and the liquid phase of the waste slurry to be separated. The solid and liquid separation technique of the water based system well drilling waste slurry provided by the invention fully solves the key technical problem that the water based system well drilling waste slurry is difficult to perform the solid and liquid separation, and establishes the reliable base for the innocent treatment of the water based system well drilling waste slurry.
Description
Technical field
The present invention relates to oil and gas exploitation probing drilling mud treatment technology, more particularly, relate to the technology of the water-based system drilling waste mud in a kind of separating treatment oil and gas exploitation drilling process.
One, background technology
In oil and gas extraction and drilling process, can produce a large amount of drilling waste muds.The composition more complicated of drilling waste mud, the mainly heterogeneous suspended substance of forming by clay, high-density weighting material, various chemical processing agent, sewage, sump oil and landwaste etc.Owing to add in the mud that drilling process uses the number of chemical material is arranged, as synthetic macromolecular compound, heavy metal ion treatment agent etc., the pollution objectionable impurities severe overweight in the drilling mud, the living environment that threatens people.Along with the raising of people's living standard and the reinforcement of environmental consciousness, drilling mud more and more receives much concern to the harm and the influence of environment, and the harmless treatment of drilling mud can not get effective solution for a long time, has become the environmental protection difficult problem of puzzlement oil, Natural gas extraction industry.Present many countries all classify the harmless treatment of drilling mud as a big event of environmental protection and study, and seek the optimization process system that can both accept on economy and the environment, to eliminate or to alleviate the drilling waste mud environmental pollution.Along with country reduces discharging the increasingly stringent that requires, water-based system drilling waste slurry harmless Study on Technology has become the urgent problem of petroleum industry environment protection.
Geographical environment, the hydrology, soil, the composition of drilling fluid and the difference that economy requires at oil-gas field, people have carried out many research work to the processing of water-based system drilling waste mud, and obtained certain effect, but be far from reaching the ideal effect that people wish.The treatment technology of drilling waste mud mainly contains at present: simple process discharging, inject safe formation or well annular space, focus on, methods such as sealing in the backfill, hole, soil cultivating, curing, solid-liquid separation, burning, microbiological treatment.These processing methodes are each has something to recommend him.All can not obtain in time thoroughly administering as sealing in simple process discharging, the annular space that injects safe formation or well, backfill, the hole, soil cultivating, curing, solid-liquid separation etc., because before taking these methods processing, these waste muds must be retained in the well site storage pool for a long time, owing to seepage, overflow, flood, reason such as storage pool collapses, can pollute surrounding soil, underground water, surface water and ecotope, even cause pollution incident.Focus on and burning disposal, processing costs is big, and does not meet current national energy saving policy.Take microbiological treatment, can only degrade organism in the water base waste mud liquid (waste water), can not solve the heavy metal in the water based waste mud and the pollution problem of oils, and the treatment time is long, generally can not be as a kind of independent treatment process, but also be not specifically designed to the microbial strains of water based waste mud microbiological treatment.Taking microbial degradation method to handle the technology of drilling waste mud liquid (waste water), that is that all right is ripe, and key is that also a water based waste mud solid-liquid separation technique difficult problem is not well solved.
In existing various drilling waste mud treatment technologies, drilling waste mud solid-liquid separation treatment technology is relatively more good in the industry a kind of treatment technology.Solid-liquid separation technique is exactly earlier drilling waste mud to be carried out solid and liquid to separate, afterwards parting liquid is further handled, make it back up to standard discharging, solid phase can bury or take other method to further process again, so the breakthrough of solid-liquid separation technique is the key of drilling waste mud harmless treatment.The drilling waste mud solid-liquid separation is on chemical coagulation-catalytic oxidation basis, the advanced treatment process that grows up in conjunction with mechanical means.Its principle is by waste mud being taken off surely, flocculate, separate, then parting liquid is carried out secondary flocculation → decolouring → sedimentation → filtration, and liquid phase reaches emission standard and effluxes.Its technology is simple, flexible, to suspended substance, colloidalmaterial clearance height.Separation of Solid and Liquid in Waste Mud is the important step that drilling waste mud is handled, if drilling waste mud is really realized industrialized, effective solid-liquid separation, ensuing work of treatment will become than being easier to.
The aqueous based systems mud that uses in the oil and gas exploitation drilling process at present mostly is and is difficult to isolating thickness mud, the used wilkinite of preparation mud itself has very strong hydratability, and a large amount of various colloid protecting resistances have been added in the mud, making has surface-active solid more much higher than common sludge in the mud, it is big that mud takes off steady difficulty.The experimental study that the contriver carried out shows that original mud can not direct filtration dewater, and is difficult to realize direct solid-liquid separation, and the dry and hard naturally process of mud is slow, even under 90-110 ℃ of situation of heating, also needs ability oven dry in 10～16 hours.Because prior art does not also find and a kind ofly cost-effectively changes the mud physicochemical property by adding chemical processing agent (as gel breaker etc.), destroy the wherein stability of colloidal dispersion, make the fine particle of suspension be agglomerated into bigger substance method, therefore make solid-liquid separating method in waste mud is handled, not be used widely.With respect to specific mud system; screen effective gel breaker (being emulsion splitter); find a kind of physicochemical property that can change drilling waste mud effectively; destroy the wherein stability of colloidal dispersion; thereby the fine particle that makes suspension is agglomerated into the method that big material is realized effective solid-liquid separation; being the urgent problem of processing of water-based system drilling waste slurry harmless and petroleum industry environment protection, also is the scholar and the engineering technical personnel's of affiliated technical field historic task.
Summary of the invention
Handle the problem that prior art exists at the water-based system drilling waste slurry harmless, purpose of the present invention aims to provide a kind of new solid-liquid separation technique for waste slurry of water-based system artesian well, to solve the water-based system drilling waste mud because of colloidal dispersion stability, be difficult to carry out effectively solid-liquid separation, realize harmless treatment, can not fundamentally solve the problem of water-based system drilling waste mud environmental hazard.
Basic thought of the present invention is by screening brokenly the glue coagulant, find a kind of physicochemical property that can change the water-based system drilling waste mud effectively, destroy its colloidal dispersion stability, make solid phase and liquid phase in the waste mud can carry out the method and the corresponding processing condition thereof of sharp separation cost-effectively, and then realize the harmless treatment fundamentally solve the water-based system drilling waste mud.
The to be solved above-mentioned technical problem that the present invention proposes can realize by the solid-liquid separation technique for waste slurry of water-based system artesian well with following technical scheme.
Solid-liquid separation technique for waste slurry of water-based system artesian well provided by the invention mainly comprises following processing step:
(1) joins slurry: add entry and the density of water-based system drilling waste mud is adjusted into is not more than 1.20g/cm
3, the water that is added can be well-drilling waste water;
(2) the broken glue of acidifying: adding gel breaker sulfuric acid will be adjusted into through the adjusted waste mud pH of density value and be not more than 5, carry out the broken glue reaction of acidifying;
(3) solid-liquid separation: will send into solid-liquid separating equipment through the broken reacted waste mud liquid of glue of abundant acidifying and carry out solid phase and the liquid phase separation that solid-liquid separation makes waste mud.
H as gel breaker (emulsion splitter)
2SO preferably adopts mass concentration to be not less than 80% dense H
2SO.
Find in contriver's research, the waste mud acidifying is broken glue (acidifying breakdown of emulsion) reaction back and is added a certain amount of coagulating agent, and the fine particle of suspension is agglomerated into bigger material, and the Solid-Liquid Separation of waste mud is further improved, particularly at the isolating initial stage, effect is particularly evident.The kind that the add-on of coagulating agent is looked coagulating agent is different and different, generally is not more than 3% of waste mud quality.Coagulating agent can be selected from Al
2(SO
4)
3, AlCl
3, CaCl
2, H
2SO
4In at least a.
Find also in contriver's research that mud density has material impact to broken glue reaction of the acidifying of waste mud and filtering separation effect.Along with mud density increases, as the density＞1.20g/cm of mud
3Condition under, the mud viscosity enlarges markedly in the broken glue reaction process of acidifying, is difficult to stir, and reacts insufficient, is difficult to reach the filtering separation condition.Therefore, for density greater than 1.20g/cm
3The water-based system drilling waste mud, carrying out joining slurry earlier before the broken glue reaction of acidifying, its density is adjusted into is not more than 1.20g/cm
3The density that reduces waste mud helps the carrying out of the broken glue reaction of acidifying, but the density of mud is low excessively, need add too much water or creep into waste water when joining slurry, has increased the weight of the load that solid-liquid separation and later stage filtrate are handled.Therefore, the pulp density preferable range of joining of mud is 1.10～1.20g/cm3.
In addition, the contriver experimental studies have found that: filter type has material impact to dehydration separation efficiency and time, under the same filtration pressure difference, adopt positive pressure operation meeting compacting viscosity slurry filter-cake, filtration efficiency is low, the time is long, adopt the vacuum pumping rate can prevent the compacting of filter cake, improve filtration efficiency and time, 60%～70% liquid filtration can be separated in the short period of time.Therefore the preferential mode of employing vacuum pumping rate of selecting is carried out solid-liquid separation, and wherein the suction filtration vacuum degree control is not less than 0.035MPa.
The pH value of the drilling waste mud liquid under the state of nature is generally 9～11, waste mud is not before adding the sulphur acid for adjusting pH value, because the used wilkinite of preparation mud itself has very strong hydratability, and a large amount of various colloid protecting resistances have been added in the mud, drilling waste mud stable high, solid-liquid separation almost can not be carried out.But the contriver finds under study for action, the solid-liquid separation speed of waste mud increases along with reducing of pH value, after the pH of waste mud liquid is reduced to 5, the solid-liquid separation speed of waste mud just has tangible increase, can carry out the industrialization solid-liquid separation, after the pH of waste mud liquid is reduced to 3, the solid-liquid separation speed of waste mud just tends towards stability, further reduce the pH value, the solid-liquid separation speed of waste mud does not almost change, and brown xanchromatic filtrate color also no longer changes.Tracing it to its cause, is because after adding sulfuric acid, along with reducing of pH value, H
+Concentration increases, H
+The broken glue throwing out that is risen increases; Behind the pH of waste mud liquid value≤3, H
+Concentration acquires a certain degree, and the colloidalmaterial in the waste mud liquid is all by the broken glue flocculation of acidifying, the H of Zeng Jiaing again
+No longer play effect, can only increase the vitriolic consumption, increase the technology cost.Therefore, waste mud should be adjusted to the pH value and be not more than 5 by adding the sulphur acid for adjusting pH value, and preferred scheme is to be adjusted to be not more than 3, and optimal scheme is to be adjusted to 2～3.
The contriver is by experiment and deep theoretical analysis repeatedly, in numerous materials that can be used as the breakdown of emulsion coagulant, filtered out cheap and good-quality sulfuric acid as broken glue coagulant, found out the factor that influences the drilling waste mud solid-liquid separation---density, mud pH value and the preferred filter type and the vacuum tightness of waste mud have proposed water-based system drilling Separation of Solid and Liquid in Waste Mud technology based on this.Solid-liquid separation technique for waste slurry of water-based system artesian well provided by the invention, solved waste mud fully because the used wilkinite of preparation drilling mud fluid itself has very strong hydratability, and adding has a large amount of various colloid protecting resistances, solid-liquid combination stability is high, and solid-liquid separation is difficult to the problem of carrying out.Because the solid-liquid separation of drilling waste mud is the key link that drilling waste mud is handled, if drilling waste mud has really been realized cost-effective solid-liquid separation, ensuing work of treatment will become than being easier to, therefore, of the present invention open, for reliable basis has been established in the improvement of water-based system drilling waste slurry harmless.
Embodiment
By the following examples the present invention is further described specifically.In following each embodiment, the consumption of each component is the quality consumption.Be necessary to be pointed out that at this; embodiment is used for that the present invention is described further; can not be interpreted as limiting the scope of the invention; the person skilled in the art in affiliated field makes some nonessential improvement and adjustment according to the foregoing invention content to the present invention, should still belong to protection model of the present invention.
Embodiment 1
The sampling waste mud is the water-based system drilling waste mud, main ingredient has silt particle that clay, wilkinite, organic polymer treatment agent, high-density weighting material, landwaste and effluent stream carry and veneer of soil etc. when ground, outward appearance is viscous fluid, brown-black, the mud slurry pH value is about 10, be alkalescence, mud density is about 1.35g/cm
3, solid content is higher, can't carry out solid-liquid separation under state of nature.In order to realize solid-liquid separation, add entry to the water-based system drilling waste mud of inserting container, stir simultaneously, its density is adjusted into 1.10g/cm
3After, add mass concentration while stirring and be 80% the vitriol oil, the vitriolic add-on is adjusted into 3 until the pH of mud liquid value, the broken glue of acidifying reacted about 15 minutes, to send into the vacuum filtration solid-liquid separating equipment through the broken reacted waste mud liquid of glue of abundant acidifying then and carry out solid-liquid separation, the vacuum tightness of vacuum filtration is 0.06MPa.Liquid phase clearance 62% in the mud in 10 minutes.。
Embodiment 2
The sampling waste mud is the water-based system drilling waste mud, main ingredient has silt particle that clay, wilkinite, organic polymer treatment agent, high-density weighting material, landwaste and effluent stream carry and veneer of soil etc. when ground, outward appearance is viscous fluid, brown-black, the mud slurry pH value is about 11, be alkalescence, mud density is about 1.30g/cm
3, solid content is higher, can't carry out solid-liquid separation under state of nature.In order to realize solid-liquid separation, add entry to the water-based system drilling waste mud of inserting container, stir simultaneously, its density is adjusted into 1.15g/cm
3After, add mass concentration while stirring and be 85% the vitriol oil, the vitriolic add-on is adjusted into 3 until the pH of mud liquid value, the broken glue of acidifying reacted about 15 minutes, carry out flocculation reaction to add the ferrous sulfate flocculation agent while stirring in the broken reacted waste mud liquid of glue of abundant acidifying then, the add-on of flocculation agent is 1% of a waste mud quality, and the flocculation reaction time is about 8 minutes, send into the vacuum filtration solid-liquid separating equipment after flocculation reaction finishes and carry out vacuum filtration, vacuum tightness 0.04MPa.Liquid phase clearance 65% in the mud in 10 minutes.
Embodiment 3
The sampling waste mud is the water-based system drilling waste mud, main ingredient has silt particle that clay, wilkinite, organic polymer treatment agent, high-density weighting material, landwaste and effluent stream carry and veneer of soil etc. when ground, outward appearance is viscous fluid, brown-black, the mud slurry pH value is about 9, be alkalescence, mud density is about 1.25g/cm
3, solid content is higher, can't carry out solid-liquid separation under state of nature.In order to realize solid-liquid separation, add entry to the water-based system drilling waste mud of inserting container, stir simultaneously, its density is adjusted into 1.15g/cm
3After, add mass concentration while stirring and be 80% the vitriol oil, the vitriolic add-on is adjusted into 2.5 until the pH of mud liquid value, the broken glue of acidifying reacted about 15 minutes, carried out flocculation reaction, the add-on 0.8% of flocculation agent to add the Tai-Ace S 150 flocculation agent while stirring in the broken reacted waste mud liquid of glue of abundant acidifying then, the flocculation reaction time is about 10 minutes, carry out vacuum filtration after the flocculation reaction knot speed, send into flame filter press and carry out solid-liquid separation, liquid phase clearance 46% in the mud in 15 minutes.
Claims (10)
1, a kind of solid-liquid separation technique for waste slurry of water-based system artesian well is characterized in that mainly comprising following processing step:
(1) joins slurry, add entry and the density of water-based system drilling waste mud is adjusted into is not more than 1.20g/cm
3
(2) the broken glue of acidifying, adding gel breaker sulfuric acid will be adjusted into through the adjusted waste mud pH of density value and be not more than 5, carry out the broken glue of acidifying and take off steady reaction;
(3) solid-liquid separation will be taken off steady reacted waste mud liquid through the broken glue of abundant acidifying and be sent into solid-liquid separating equipment and carry out solid phase and the liquid phase separation that solid-liquid separation makes waste mud.
2, solid-liquid separation technique for waste slurry of water-based system artesian well according to claim 1, the equipment that it is characterized in that said solid-liquid separation is the vacuum filtration separating device, the suction filtration vacuum tightness of vacuum filtration separating device is not less than 0.035Mpa.
3, solid-liquid separation technique for waste slurry of water-based system artesian well according to claim 1 is characterized in that mud adds coagulating agent and carries out coagulating after the broken glue of acidifying takes off steady reaction, and the add-on of coagulating agent is not more than 3% of waste mud quality.
4, solid-liquid separation technique for waste slurry of water-based system artesian well according to claim 2 is characterized in that coagulating agent is selected from Al
2(SO
4)
3, AlCl
3, CaCl
2, H
2SO
4In at least a.
5, solid-liquid separation technique for waste slurry of water-based system artesian well according to claim 4 is characterized in that said H
2SO is that mass concentration is not less than 80% dense H
2SO.
6,, it is characterized in that adding entry the density of waste mud is adjusted into 1.10～1.20g/cm according to claim 1 or 2 or 3 or 4 or 5 described solid-liquid separation technique for waste slurry of water-based system artesian well
3
7,, it is characterized in that adding gel breaker sulfuric acid and will be adjusted into through the adjusted waste mud pH of density value and be not more than 3 according to claim 1 or 2 or 3 or 4 or 5 described solid-liquid separation technique for waste slurry of water-based system artesian well.
8, solid-liquid separation technique for waste slurry of water-based system artesian well according to claim 7, it is characterized in that adding gel breaker sulfuric acid will be adjusted into 2～3 through the adjusted waste mud pH of density value.
9, solid-liquid separation technique for waste slurry of water-based system artesian well according to claim 6 is characterized in that adding gel breaker sulfuric acid and will be adjusted into through the adjusted waste mud pH of density value and be not more than 3.
10, solid-liquid separation technique for waste slurry of water-based system artesian well according to claim 9, it is characterized in that adding gel breaker sulfuric acid will be adjusted into 2～3 through the adjusted waste mud pH of density value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100443837A CN101269888A (en) | 2008-05-09 | 2008-05-09 | Solid-liquid separation technique for waste slurry of water-based system artesian well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100443837A CN101269888A (en) | 2008-05-09 | 2008-05-09 | Solid-liquid separation technique for waste slurry of water-based system artesian well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101269888A true CN101269888A (en) | 2008-09-24 |
Family
ID=40004150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100443837A Pending CN101269888A (en) | 2008-05-09 | 2008-05-09 | Solid-liquid separation technique for waste slurry of water-based system artesian well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101269888A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103524017A (en) * | 2013-10-23 | 2014-01-22 | 中国海洋石油总公司 | Compound gel breaker for processing abandoned drilling mud at sea |
| CN104086023A (en) * | 2014-06-30 | 2014-10-08 | 成都高普石油工程技术有限公司 | Method conducive to reducing energy consumption for solid-liquid separation of drilling waste liquid |
| CN105645630A (en) * | 2015-12-31 | 2016-06-08 | 安东环保技术有限公司 | Water-based drilling well-completion waste treatment method |
| CN106242119A (en) * | 2016-08-31 | 2016-12-21 | 西南石油大学 | Discarded sulphonated polymer mud gel breaker and gel breaking method thereof |
| CN111233201A (en) * | 2020-02-20 | 2020-06-05 | 山东科技大学 | Working face mine water solid removal device and solid removal process |
| CN112983318A (en) * | 2019-12-17 | 2021-06-18 | 中国石油天然气股份有限公司 | Treatment device and treatment method for drilling waste |
| CN115259469A (en) * | 2022-08-15 | 2022-11-01 | 中国铁建重工集团股份有限公司 | Method and system for treating rock powder waste slurry generated by construction of tunneling equipment |
| CN115557738A (en) * | 2022-10-24 | 2023-01-03 | 宁夏新大地环保科技工程有限公司 | Roadbed filling material and manufacturing method thereof |
-
2008
- 2008-05-09 CN CNA2008100443837A patent/CN101269888A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103524017A (en) * | 2013-10-23 | 2014-01-22 | 中国海洋石油总公司 | Compound gel breaker for processing abandoned drilling mud at sea |
| CN103524017B (en) * | 2013-10-23 | 2014-12-03 | 中国海洋石油总公司 | Compound gel breaker for processing abandoned drilling mud at sea |
| CN104086023A (en) * | 2014-06-30 | 2014-10-08 | 成都高普石油工程技术有限公司 | Method conducive to reducing energy consumption for solid-liquid separation of drilling waste liquid |
| CN105645630A (en) * | 2015-12-31 | 2016-06-08 | 安东环保技术有限公司 | Water-based drilling well-completion waste treatment method |
| CN105645630B (en) * | 2015-12-31 | 2018-11-23 | 安东环保技术有限公司 | A kind of processing method of the complete well waste of water-based drilling |
| CN106242119A (en) * | 2016-08-31 | 2016-12-21 | 西南石油大学 | Discarded sulphonated polymer mud gel breaker and gel breaking method thereof |
| CN106242119B (en) * | 2016-08-31 | 2019-03-19 | 西南石油大学 | Discarded sulphonated polymer mud gel breaker and its gel breaking method |
| CN112983318A (en) * | 2019-12-17 | 2021-06-18 | 中国石油天然气股份有限公司 | Treatment device and treatment method for drilling waste |
| CN111233201A (en) * | 2020-02-20 | 2020-06-05 | 山东科技大学 | Working face mine water solid removal device and solid removal process |
| CN115259469A (en) * | 2022-08-15 | 2022-11-01 | 中国铁建重工集团股份有限公司 | Method and system for treating rock powder waste slurry generated by construction of tunneling equipment |
| CN115557738A (en) * | 2022-10-24 | 2023-01-03 | 宁夏新大地环保科技工程有限公司 | Roadbed filling material and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101269888A (en) | Solid-liquid separation technique for waste slurry of water-based system artesian well | |
| CN103043831B (en) | Treatment method of continental shale gas well fracturing operation waste liquid | |
| CN105107824B (en) | A kind of oilfield drilling discarded object method for innocent treatment | |
| CN104098250B (en) | A kind of municipal sludge chemical conditioning strengthening preliminary mechanical dehydration associating electro-osmosis two-stage deep dehydration method | |
| CN105621823B (en) | The treatment process for the oily sludge that disposing polluted water in oil generates | |
| CN103145313B (en) | Sludge conditioning agent appropriate for sludge incineration handling and conditioning method | |
| CN104355524A (en) | Deep dewatering method for sludge | |
| CN105314815A (en) | Sludge dewatering conditioning agent and dewatering method thereof | |
| CN111018282B (en) | Porous biological polymerization agent for dewatering ecological dredging bottom mud of rivers and lakes | |
| Zhu et al. | Combined sludge conditioning with NaCl-cationic polyacrylamide-rice husk powders to improve sludge dewaterability | |
| CN104724898B (en) | A kind of sludge pretreatment technique | |
| CN104386861B (en) | The broken glue nucleation treatment process of rejected well drilling liquid | |
| CN107382128B (en) | Anti-collapse polymer slurry powder and preparation method and application thereof | |
| CN102718341A (en) | Centrifugal non-landing waste drilling fluid innocent treatment technology | |
| CN106746394B (en) | Harmless curing treatment agent for petroleum drilling waste mud and use method thereof | |
| CN103708704B (en) | Pre-treatment method for deep sludge dewatering | |
| Yang et al. | Explore the closed-loop disposal route of surplus sludge: Sludge self-circulation preparation of sludge-based biochar (SBB) to enhance sludge dewaterability | |
| CN104445338B (en) | A kind of waste drilling mud processing method | |
| CN106050175A (en) | Off-ground treatment technology for waste drilling fluid | |
| CN108328827A (en) | Leachate pyrolytic gasification treatment technology | |
| CN101376071B (en) | Technique for separating mud and water in river and lake deposit | |
| CN109455901A (en) | A kind of process that mud is separated by solid-liquid separation | |
| CN107060671A (en) | Industrial profit waste pollution soil landwaste ecological control techniques | |
| CN102030495A (en) | Cement and soil composite addictive based on impermeable function | |
| CN102086071A (en) | New reinjection treatment method of polysulfonate drilling wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080924 |