CN100391877C - Oil field sludge resource treating process - Google Patents
Oil field sludge resource treating process Download PDFInfo
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Abstract
The present invention discloses oil field sludge resource treating process. The oil field sludge resource treating process includes flushing waste sludge to eliminate bits, diluting and adsorbing, demulsifying to eliminate oil, concreting and solid-liquid separating, neutralizing and reverse washing filter cake to desalt, neutralizing, oxidizing and filtering the filtrate, and solidifying mud cake for reuse. The present invention can eliminate oil field sludge pollution and utilize the oil field sludge resource comprehensively. The oil field sludge resource treating may be skid mounted onto well drilling apparatus for movable operation.
Description
One, technical field:
The present invention relates to a kind of treatment process of oilfield waste thing, particularly a kind of oil field sludge resource treating process.
Two, background technology:
In the petroleum drilling and mining process, often produce a large amount of mining site waste (based on drilling well discarded slurry and oil-extracting and water-injecting system sedimentation oily sludge), the drilling well discarded slurry is the general name of the sewage that discharges in the drilling well production process, mud, detrital mixed waste, oil field oil sludge be recover the oil, oily sludge that the waterflood system separate and subside produces.These wastes are a kind of high stability colloids, contain clay, high-density weighting material, chemical processing agent, oils etc.; Have the water ratio height, mobile strong, volume is big, extracts and separates wherein relatively difficulty of poisonous and harmful (heavy metal, acid, alkali, salt, greasy dirt, organism etc.) pollution substance.Still there is not the ideal treatment process at present, generally take to shift and leave concentratedly, or it is medium to leave the well site suction pit in, can not fundamentally solve the pollution problem of waste like this, inevitably surrounding environment and underground water source are polluted, in addition make land occupation be subjected to serious pollution can not second ploughing and lie waste.
Oilfield waste mud is formed complexity because of it, and is relatively very stable, therefore eliminates it situ of drilling well is polluted, and it is quite difficult thoroughly to eliminate its pollution to entire environment.The domestic in recent years improvement patent of having delivered multinomial at oilfield waste mud in succession, as application number CN93110918.3, CN03156168.3, CN200410035507.7, CN03128333, the curing technology of discarded slurry has been studied by CN02104801 and relevant departments, these technology are contributing aspect the improvement discarded slurry, but a common ground of these technology is by adding chemical agent waste drilling fluid to be solidified in the pond, bury with soil again after reaching certain intensity, second ploughing, can not do completely discarded slurry sump oil mud and handle, still there is comparatively serious pollution problem in the discarded slurry sump oil mud after the processing to surrounding environment and underground water source.And then to a certain extent, patent of invention CN021165548, CN01127714.9 and some other patents relate to drilling mud water and oil recovery sump oil mud improvement method, do not appear in the newspapers but really reach than the method for thorough recycling treatment.Therefore, in order thoroughly to solve oil field sludge, be necessary to oil discarded slurry sump oil mud resource Study on Processing Methods to the serious pollution problem of surrounding environment and underground water source and the recycling of the energy.
Three, summary of the invention:
The object of the invention: overcome the problem that exists in the known technology, propose a kind of oil discarded slurry sump oil mud resource treatment process.
Technical scheme of the present invention is:
The present invention proposes a kind of oil discarded slurry sump oil mud resource treatment process, and its production method may further comprise the steps: in oil discarded slurry sump oil mud flushing furfur, dilution absorption, the broken steady oil removing of broken glue, fixed and solid-liquid separation, the filter cake and in the backwash desalination, filtrate and oxidation filter again handle, the curing utilization of mud cake.The detailed step of its treatment process is:
(1) flushing, furfur step: earlier discarded slurry or sump oil mud are added the water flushing by 30-40 purpose reciprocating sieve, remove the landwaste or the grit of greater particle size;
(2) dilution, adsorption step: discarded slurry or the sump oil mud thin up that will remove behind the greater particle size pump into the interior stirring of stirred pot to water ratio more than 80%, (agent of absorption draining is a flyash in every cube of mud absorption draining agent of adding 20-70kg earlier, vermiculite, in granular carbon and the lime carbonate any) stir, churning time is 15-25 minute; The calcium oxide that adds 20-50kg again, oxyaluminum, calcium hydroxide, sepiolite, any in phosphatic rock and the adsorptive resin; Stir then, churning time is 15-25 minute, and mud or sump oil mud are adsorbed draining;
(3) broken steady, the deoiling step of broken glue: (broken glue destabilizing agent is the polyaluminum sulfate aluminium iron silicate to add the broken glue destabilizing agent of 10-20kg in every cube of mud then, cationic polymers polyoxypropylene trimethyl ammonium chloride, poly-2-ethene imidazoline salt hydrochlorate, amphiprotic polyacrylamide, in polyvinylamine and the bodied ferric sulfate any), stir, churning time is 15-25 minute, utilizes oil-collecting device that the sump oil of top emersion is carried out Separation and Recovery after the stirring;
(4) fixed and solid-liquid separation step: after the sump oil in the mud separates, adding the above cement of 5-10kg425# in every cube of mud again stirs, churning time is 15-25 minute, the mud that stirs is pumped into the pressure filter press filtration (the filter cloth fineness is the 300-400 order) of (pump pressure is controlled at 0.1-0.6Mpa) band backwash flow process, and pressurize 5-10 minute, up to there not being filtrate discharge, filter cake is separated with filtrate;
(5) filter cake dewaters to reach to solidify through neutralization, desalination again and utilizes step: open the backwash flow process, above-mentioned steps is separated the filter cake that obtains, earlier pumping into pressure filter backwash to filtrate with the dilute hydrochloric acid of 2≤PH≤4 or dilute sulphuric acid is 6≤PH≤9, use clear water again instead and continue backwash, when treating filtrate salinity≤500mg/L, stop backwash; Feeding pressure in pressure filter is the pressurized air of 0.5-0.8Mpa, compresses (water ratio of mud cake is 50-60% before the air compression) after the portion of water in the filter cake with air, and the moisture content of the cake that obtains is 40-45%, is cured utilization then;
(6) deviate from filtrate through neutralization, oxidation and filter treatment step again: the filtrate that will deviate from, pickle solution, after backwash filtrate is mixed, adding earlier 2≤PH≤4 dilute hydrochloric acid or dilute sulphuric acid in every cube of filtrate, to be adjusted to liquid be 6≤PH≤9, after adding liquid Losantin 1-10% (or dioxide peroxide) the stirring oxidation of chlorinity 2≤Cl%≤10 again, after adding the heavy agent polyaluminum sulfate aluminium iron silicate (concentration is 30%) of the broken speed stabilizing of broken glue of 0.5-2%, again it is pumped into (pump pressure is controlled at 0.4-1.0Mpa) pressure filter press filtration (the filter cloth fineness is the 600-800 order), filtrate can be done industrial water recycling, just can reach " integrated wastewater discharge standard " GB8978-1996 grade III Standard through adsorption filtration again, then with its discharging;
(7) the curing utilization of mud cake, its method is: the one, do the roadbed raw material of building the road; The 2nd, making burn-free bricks: add landwaste that the flushing of the slag cement of 12-15% (volumn concentration) and 10-15% (volumn concentration) removes or grit in the mud cake after every cube of filtration, add the liquid sodium silicate 1-3% that modulus is 3-3.5 again, stir, churning time is 20-40 minute, when water ratio reaches 12% left and right sides, with brick press or non-baking brick machine extrusion molding, watering both became qualified building baking-free brick material in health 5-7 days; The 3rd, the clay of blending 50-80% stirs, and churning time is 20-40 minute, make adobe with brick press after, the cool solarization about 70h, kiln-firing 900-1200 ℃ becomes common brick.
These two kinds of materials of absorption draining agent in the above-mentioned treatment process and broken glue destabilizing agent have certain intensity, in pressure filter, be difficult for deformation or have vesicular structure be beneficial to filtrate by have adsorptivity or have with discarded slurry sump oil mud in the character of harmful ion generation chemical reaction.The stir speed (S.S.) of used stirrer is 40-60 rev/min.
Positive beneficial effect of the present invention:
(1) can thoroughly solve the pollution problem of the sump oil mud that the waste that produces in the drilling well production process and oil-extracting and water-injecting system produce by the present invention: oilfield waste mud or sump oil mud can realize in solid-liquid separation, the mud by the present invention and desalination, harmless treatment and primary sludge volume reduce by 3/5 target, mud cake after the processing can obtain solidifying and utilize, filtrate in the treating processes can be done industrial water recycling through the present invention, perhaps reaches " integrated wastewater discharge standard " GB8978-1996 grade III Standard through adsorption filtration it is discharged.Thus, solved the pollution problem of discarded slurry and sump oil mud.
(2) economic benefit and social environment benefit: the mud cake that obtains by recycling treatment of the present invention can solidify utilization, has turned waste into wealth since like this, can obtain bigger economic benefit; Can thoroughly solve the severe contamination of oil field sludge to the soil by the present invention, can make drilling well occupy the ground second ploughing, save a large amount of land resourcess, visible economic benefit is very remarkable; Can solve the pollution of oil discarded slurry sump oil mud to surrounding environment and water resources by the present invention, social environment benefit is equally very outstanding.
(3) treatment process of the present invention, equipment are can skid integrated, with the wellbore construction mobile operating, are easy to apply.
Four, description of drawings
Fig. 1 is the process flow sheet of oil field sludge resource treating process of the present invention
Five, embodiment
Embodiment one: a kind of oil field sludge resource treating process
Its treatment process comprises: in oil discarded slurry sump oil mud flushing furfur, dilution absorption, the broken steady oil removing of broken glue, fixed and solid-liquid separation, the filter cake and in the backwash desalination, filtrate and oxidation filter again handle, the curing utilization of mud cake.Its detailed production stage is:
(1), the flat two well waste drilling fluids in Zhongyuan Oil Field earlier with the oil discarded slurry by 30-40 purpose reciprocating sieve and add the water flushing, remove the landwaste or the grit of greater particle size;
(2), the discarded slurry thin up that will remove behind the larger particles stirs to pumping in the stirred pot after water ratio is more than 80%;
(3), the absorption draining agent flyash that adds 20kg in every cube of mud earlier stirs, churning time is 15-25 minute, the calcium oxide that adds 20kg again stirs, churning time is 15-25 minute;
(4), then the broken glue destabilizing agent polyaluminum sulfate aluminium iron silicate that adds 10kg stirs, and churning time is 15-25 minute, utilizes the sump oil Separation and Recovery of oil-collecting device with the top emersion after the stirring;
(5), add the above cement stirring of 5kg425# in every cube of mud behind the removal sump oil, stir after 15-25 minute, mud is pumped into (pump pressure is controlled at 0.1-0.6Mpa, filtration area is six square metres) pressure filter (band backwash flow process) press filtration (the filter cloth fineness is the 300-400 order) press filtration, ten minutes (comprising the time of pumping into) of press filtration;
(6), then open the backwash flow process, above-mentioned steps is separated the filter cake obtain, pumping into pressure filter backwash to filtrate with the dilute hydrochloric acid of 2≤PH≤4 or dilute sulphuric acid earlier is 6≤PH≤9, uses clear water continuation backwash again instead, treats filtrate salinity≤500mg/L, stops backwash;
(7), then in pressure filter, feed the pressurized air of pressure 0.5-0.8Mpa, compress (this moment, water ratio was 50-60%) after the portion of water in the filter cake, obtain the mud cake that water ratio is 40-45% with air; Filter cloth is not stained with in the smooth densification of this mud cake, the thick 35mm of filter cake, and the little Huang of filtrate, principal pollutant reach emission standard after secondary treatment.Mud cake pH value after the processing reaches " agricultural mud pollutent control criterion " near neutral, monitoring principal pollutant content, and its leach liquor heavy metal reaches " discriminating of Hazardous wastes discriminating-leach liquor " standard.
Embodiment two: a kind of oil field sludge resource treating process, and basic identical with embodiment one, something in common is no longer narrated, and difference is:
Behind the flat well waste drilling fluid thin up in Zhongyuan Oil Field, the absorption draining agent granular carbon that adds 70kg in every cube of mud, add the 20kg calcium oxide, add the broken glue destabilizing agent polyvinylamine of 10kg, pump into the plate type pressure filter of ten square metres of press filtration areas after the stirring, press filtration finishes (comprising the time of pumping into) after eight minutes, through in and after acid solution and clear water backwash, the pressurized air compression, the thick 55mm of mud cake, smooth densification, filtrate is limpid, can direct reuse.
Embodiment three: a kind of oil field sludge resource treating process, and basic identical with embodiment one, something in common is no longer narrated, and difference is:
The absorption draining agent vermiculite that adds 50kg in every cube of mud of Zhongyuan Oil Field literary composition 12 well waste drilling fluids, add 30kg calcium hydroxide, the poly-2-ethene imidazoline salt hydrochlorate of the broken glue destabilizing agent of 15kg, the smooth densification of the filter cake of extrusion, the little Huang of filtrate, principal pollutant reach emission standard after treatment.
Embodiment four: a kind of oil field sludge resource treating process, and basic identical with embodiment one, something in common is no longer narrated, and difference is:
Three factory's waterflood system sump oil mud recover the oil in the Zhongyuan Oil Field, every cube of sump oil mud (continuously stirring) successively adds the cement of 70kg flyash, 50kg oxyaluminum, 10kg polyaluminum sulfate aluminium iron silicate, 10kg behind the thin up, pump into the paper blotter press of six square metres of filtration areas, ten minutes (comprising the time of pumping into) of press filtration, through in and after acid solution and clear water backwash, the pressurized air compression, filter cloth is not stained with in the smooth densification of filter cake, the thick 35mm of filter cake, filtrate is limpid.Mud cake PH after the processing reaches " agricultural mud pollutent control criterion " near neutral, monitoring principal pollutant content, and its leach liquor heavy metal reaches " discriminating of Hazardous wastes discriminating-leach liquor " standard.Filtrate reaches emission standard through the secondary treatment principal pollutant.
Embodiment five: a kind of oil field sludge resource treating process, and this embodiment is for filtering the comprehensive utilization of back mud cake:
Mud cake after the above-mentioned processing is got 10 cubes, add landwaste that 15% slag cement (volume), 10% flushing remove or grit aggregate, modulus in every cube of mud cake and be 3.5 liquid sodium silicate 1%, the above-mentioned raw materials additive is stirred, churning time is 30min, when water ratio reaches 12% left and right sides, with the health 5 days of watering after the non-baking brick machine extrusion molding, it is non-burning brick both to have become qualified building.
Embodiment six: a kind of oil field sludge resource treating process, and this embodiment is for filtering the comprehensive utilization of back mud cake:
Mud cake after the above-mentioned processing is got 10 cubes, add landwaste that 12% slag cement (volume), 15% flushing remove or grit aggregate, modulus in every cube of mud cake and be 3.0 liquid sodium silicate 3%, the above-mentioned raw materials additive is stirred, churning time is 40min, when water ratio reaches 12% left and right sides, with the health 7 days of watering after the non-baking brick machine extrusion molding, it is non-burning brick both to have become qualified building.
Embodiment seven: a kind of oil field sludge resource treating process, and this embodiment is for filtering the comprehensive utilization of back mud cake:
Mud cake after the above-mentioned processing is got 10 cubes, and the clay of blending 80% stirs in every cube of mud cake, and churning time is 20-40min, make adobe with brick press, the cool solarization about 70h gone into the clay Brick Kiln and can be fired into common brick, and detection resistance to compression, folding strength reach building standard.
Claims (8)
1. an oilfield waste mud, sump oil mud resource treatment process, it is characterized in that: this treatment process may further comprise the steps:
(1) flushing, furfur step: earlier discarded slurry or sump oil mud are added the water flushing by 30-40 purpose reciprocating sieve, remove the landwaste or the grit of greater particle size;
(2) dilution, adsorption step: will remove discarded slurry behind the greater particle size or sump oil mud thin up and pump into more than 80% in the stirred pot to water ratio and stir, the absorption draining agent of every cube of adding 20-70kg of mud elder generation stirs, and churning time is 15-25 minute; The calcium oxide that adds 20-50kg again, oxyaluminum, calcium hydroxide, sepiolite, any in phosphatic rock and the adsorptive resin; Stir then, churning time is 15-25 minute, and mud or sump oil mud are adsorbed draining;
(3) broken steady, the deoiling step of broken glue: add the broken glue destabilizing agent of 10-20kg in every cube of mud then and stir, churning time is 15-25 minute, utilizes oil-collecting device that the sump oil of top emersion is carried out Separation and Recovery after the stirring;
(4) fixed and solid-liquid separation step: after the sump oil in the mud separates, adding the above cement of 5-10kg425# in every cube of mud stirs, churning time is 15-25 minute, the mud that stirs is pumped into the pressure filter press filtration of band backwash flow process, and pressurize 5-10 minute, up to there not being filtrate discharge, filter cake is separated with filtrate;
(5) filter cake dewaters to reach to solidify through neutralization, desalination again and utilizes step: open the backwash flow process, above-mentioned steps is separated the filter cake that obtains, earlier pumping into pressure filter backwash to filtrate with the dilute hydrochloric acid of 2≤PH≤4 or dilute sulphuric acid is 6≤PH≤9, use clear water again instead and continue backwash, when treating filtrate salinity≤500mg/L, stop backwash; In pressure filter, feed the pressurized air of 0.5-0.8Mpa, compress a part of water in the filter cake with air after, obtain the mud cake that water ratio is 40-45%, be cured utilization then;
(6) deviate from filtrate through neutralization, oxidation and filter treatment step again: the filtrate that will deviate from, pickle solution, after backwash filtrate is mixed, adding earlier 2≤PH≤4 dilute hydrochloric acid or dilute sulphuric acid in every cube of filtrate, to be adjusted to liquid be 6≤PH≤9, after adding the liquid Losantin 1-10% stirring oxidation of chlorinity 2≤Cl%≤10 again, after adding the heavy agent of the broken speed stabilizing of the broken glue of 0.5-2% at last, again it is pumped into the pressure filter press filtration, filtrate is as the process water recycling, just can reach " integrated wastewater discharge standard " GB8978-1996 grade III Standard through adsorption filtration again, then with its discharging.
2. treatment process according to claim 1 is characterized in that: the agent of the draining of absorption described in the step (2) is a flyash, vermiculite, any in granular carbon and the lime carbonate; Broken glue destabilizing agent is the polyaluminum sulfate aluminium iron silicate described in the step (3), cationic polymers polyoxypropylene trimethyl ammonium chloride, poly-2-ethene imidazoline salt hydrochlorate, amphiprotic polyacrylamide, any in polyvinylamine and the bodied ferric sulfate.
3. treatment process according to claim 2, it is characterized in that: these two kinds of materials of agent of described absorption draining and broken glue destabilizing agent have certain intensity, in pressure filter, be difficult for deformation or have vesicular structure be beneficial to filtrate by have adsorptivity or have with discarded slurry sump oil mud in the character of harmful ion generation chemical reaction.
4. treatment process according to claim 1 is characterized in that: when pumping into the pressure filter press filtration described in the step (4), pump pressure is controlled at 0.1-0.6Mpa, and the filter cloth fineness is the 300-400 order.
5. treatment process according to claim 1 is characterized in that: the water ratio of mud cake was 50-60% before step (5) hollow air pressure contracted.
6. treatment process according to claim 1 is characterized in that: the curing utilization of described mud cake: the one, as building the road the roadbed raw material; The 2nd, making burn-free bricks: the mud cake that obtains after every cube of filter adds volumn concentration and is the landwaste removed of the slag cement of 12-15% and flushing that volumn concentration is 10-15% or grit, adds the liquid sodium silicate 1-3% that modulus is 3-3.5 again, stir, churning time is 20-40 minute, reach at 12% o'clock at water ratio, both became qualified building baking-free brick material with watering after brick press or the non-baking brick machine extrusion molding in health 5-7 days; The 3rd, blending 50-80% clay evenly mixes and stirs, and churning time is 20-40 minute, make adobe with brick press after, kiln-firing 900-1200 ℃ becomes common brick behind the cool 70h of solarization.
7. treatment process according to claim 1 is characterized in that: the heavy agent of the broken speed stabilizing of broken glue described in the step (6) is the polyaluminum sulfate aluminium iron silicate, and the concentration of this material is 30%; When pumping into the pressure filter press filtration, pump pressure is controlled at 0.4-1.0Mpa, and the filter cloth fineness is the 600-800 order.
8. treatment process according to claim 1 is characterized in that: in step (2), (3), the stir speed (S.S.) of stirrer described in (4) is 40-60 rev/min.
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| CN1887752A (en) | 2007-01-03 |
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