CN104773880A - Sewage treatment technology and equipment for well drilling - Google Patents

Sewage treatment technology and equipment for well drilling Download PDF

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Publication number
CN104773880A
CN104773880A CN201510223499.7A CN201510223499A CN104773880A CN 104773880 A CN104773880 A CN 104773880A CN 201510223499 A CN201510223499 A CN 201510223499A CN 104773880 A CN104773880 A CN 104773880A
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drilling
cyclone separator
waste water
tube settler
tube
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CN104773880B (en
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张泉
严宏嘉
李艳
刘亚柯
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NANCHONG SOUTHWEST PETROLEUM UNIVERSITY DESIGN AND RESEARCH INSTITUTE Co Ltd
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NANCHONG SOUTHWEST PETROLEUM UNIVERSITY DESIGN AND RESEARCH INSTITUTE Co Ltd
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Abstract

The invention discloses a sewage treatment technology and equipment for well drilling. The sewage treatment for well frilling reaches a first grade of the national standard of the sewage discharge. According to the sewage treatment technology for well drilling, oil-removing is conducted on the sewage for well-drilling firstly; then acid or alkali is added to adjust the PH value to 6 to 9; coagulant is added further, centrifugal sedimentation is conducted, and residual liquid generated in the centrifugal sedimentation process is discharged from a blow-off pipe respectively; precipitation separation and filtration are conducted further, finally the filtered sewage for well drilling is detected, qualified swage is discharged through a pure-water outlet, and unqualified sewage is discharged after sufficient oxidation and adsorption. According to the sewage treatment equipment for well drilling, adding of acid and alkali is conducted through a hydraulic jet device, stirring and mixing are conducted through a tubular mixer, centrifugal sedimentation is conducted through a cyclone separator, and sedimentation is conducted through a slant-tube sedimentation basin. The sewage treatment technology and equipment for well drilling have the advantages that continuous treatment on sewage for well drilling is realized, the simultaneous processing of drug adding, mixing, sedimentation, pure-water discharging and residual-liquid discharging is guaranteed, the treatment time is saved, and the treatment efficiency is improved.

Description

Sewage treatment technology for well drilling and equipment
Technical field
The present invention relates to a kind for the treatment of process and treatment facility of drilling waste water.
Background technology
In drilling process, a large amount of drilling waste waters scrapping the generations such as drilling fluid, equipment flushing, Cooling and Lubricator equipment and burst accident left over after drilling fluid leakage, well drilling detritus, finishing drilling.Drilling waste water complex chemical composition, chemistry is de-surely large than general sewage difficulty, is a kind of stabilising system of colloid, and composition is different with oil field stratum, drilling fluid composition different and have bigger difference, and physicochemical property also has bigger difference.Containing oily substance, clay, organic agent and inorganic salt etc. in drilling waste water, the feature that drilling waste water also has pollutant load high, general suspended substance reaches more than 3000mg/L, and petroleum substance is 100 ~ 1000mg/L.
Containing a large amount of poisonous wastes in drilling waste water, as can not be effectively processed, long-term accumulation permeates the ground through rainwater leaching, soil to its periphery, vegetation, surface water and groundwater are caused severe contamination, especially heavy metal wherein and compound thereof, can long term accumulation in water surrounding or biology, to the mankind live bring potential harm.Drilling well (pressure break the returns row) sewage particularly produced in drilling well and each operation of pressure break, have the advantages that colourity is high, concentration of suspension is high, Chemical Composition is complicated, if effectively do not processed, serious pollution will be caused to environment, drilling well be produced and produces huge pressure.
The Basic practice of current drill crew process drilling well (pressure break returns row) sewage is:
1), build sewage lagoon to collect drilling waste water, pressure break and return sewer, solid phase and the impurity such as the silt particle in sedimentation sewage.
2), sewage is carried out flocculate, the Chemical Pretreatment such as decolouring.
Drilling waste water after Chemical Pretreatment can not qualified discharge, and can not meet the requirement of production reuse, therefore pretreated drilling waste water generally need carry out reinjection technology, and this rises making the potentially dangerous of drilling cost and environmental pollution.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of sewage treatment technology for well drilling, drilling wastewater treatment is reached national sewage comprehensive emission standard GB8978-96 primary standard.
The technical scheme that the present invention solves the problems of the technologies described above employing is: sewage treatment technology for well drilling, comprises the following steps:
A, by oil removal plant, oil removing is carried out to drilling waste water;
The pH value of B, test drilling waste water, adds acid or alkali according to the pH value of drilling waste water and mixes, regulating pH value to 6 ~ 9 of drilling waste water;
C, in drilling waste water, add coagulating agent and centrifugal settling, the slag liquid that centrifugal settling produces is discharged by blow-off pipe;
D, drilling waste water enter settling tank and precipitate, and the slag liquid that settling tank produces is discharged by blow-off pipe;
E, drilling waste water enter filtering basin from settling tank and filter;
F, the drilling waste water after filtering to be detected, directly outer row up to standard, below standard after fully oxidized, absorption outer row again.
Further, in described step B, in drilling waste water, add acid or alkali by hydraulic jeting device.
Adopt hydrojet suction acid or alkali to achieve Automatic Dosing, acid or alkali and drilling waste water can be made to be held in metastable blending ratio, guarantee fully carrying out of subsequent step.When adding acid or alkali, according to pH value and the influx of drilling waste water, the valve of acid or alkali is added in adjustment, and by dosing pump, automatic or manual acid liquid or alkali lye neutralize drilling waste water.
Further, in described step B, mixed by tube mixer, described tube mixer comprises the 1# tube mixer and 2# tube mixer that are connected in series.
Adopt tube mixer to mix drilling waste water, first does not need separately to establish power-equipment, decreases electric motor and agitator; Second improves mixed effect, and tube mixer can carry out the mixing of full fluid, there is not stirring dead angle, achieves and be fully uniformly mixed; Three-tube type mixing tank mixing time is short, and only need a few second, mixing efficiency is high, and avoids and to cause because churning time is long flocs unit (being commonly called as alumen ustum) broken, causes the problem that post precipitation weak effect and sedimentation time increase.
Further, in described step C, the device that centrifugal settling uses is cyclone separator, and described cyclone separator is at least two, and drilling waste water adds coagulating agent through arbitrary cyclone separator, sucks air while adding coagulating agent.
Cyclone separator plays the effect of mixing further on the one hand, on the other hand, utilize the effect of centrifugal force, the oil suspensions formed after making complete reaction-water-mud (solid particulate, flocs unit etc.) three-phase initial gross separation, mud is precipitated gradually and is discharged by blow-off pipe.
Air is sucked while adding coagulating agent, drilling waste water and air mix and produce air supporting in cyclone separator, many micro-bubbles that air supporting is formed overflow from the top of cyclone separator, take away drilling waste water and add the oil of light specific gravity in medicament composition mixed solution and many small suspended substances.
Be further, described cyclone separator comprises the 1# cyclone separator of connection in sequential series, 2# cyclone separator, 3# cyclone separator and 4# cyclone separator, drilling waste water adds coagulating agent when entering 1# cyclone separator, adds polymeric treating agent when drilling waste water enters 3# cyclone separator.
Be further, in described D step, settling tank is tube settler, described tube settler comprises 1# tube settler and the 2# tube settler of connection, 2# tube settler water outlet arranges V-notch weir, and drilling waste water first flows into 1# tube settler, then flows into 2# tube settler, described 1# tube settler is same flow precipitation pond, and 2# tube settler is reverse flow settling tank.
The drilling waste water inflow tube settler flowed out from last step cyclone separator precipitates, and owing to have employed tube settling, hydraulics improves, and elaioleucite particle separation diameter reduces, thus significantly improves treatment effect.Drilling waste water first flows into 1# tube settler, and the drilling waste water after rough purification flows into 2# tube settler again.
1# tube settler is concurrent (sludge settling direction is identical with water (flow) direction) settling tank, further three phase separation is carried out to drilling waste water, mainly make the oil of light specific gravity and suspended substance be gathered in liquid level and separate from drilling waste water, and mud is deposited in the bottom of tube settler because of swash plate effect.2# tube settler is reverse flow (sludge settling direction is contrary with water (flow) direction) settling tank.The area of 2# tube settler is greater than the area of 1# tube settler, and drilling waste water flows into 2# tube settler flows decrease, can improve separating effect, the process of drilling waste water is thoroughly changed further.
Further, in described E step, filling cinder in filtering basin.
Further, in described F step, below standard drilling waste water is arranged sequentially through outer again after catalyst oxidation reactor, adsorption unit.
Drilling waste water after filtering is detected by proofing unit, reaches can arranging or carry out reuse of national composite wastewater discharge primary standard directly outward; Do not reach national composite wastewater discharge primary standard, regulate ozonizer according to this detected result, carry out catalyzed oxidation, then just can complete outside process directly through adsorption device adsorbs and arrange or carry out reuse.Particularly, the sorbent material in described adsorption unit is gac.
In addition, proofing unit can also be set after adsorption unit, drilling waste water after peroxidation, absorption is detected, reach the directly outer of national composite wastewater discharge primary standard arrange or carry out reuse, the drilling waste water not meeting national composite wastewater discharge primary standard is back to catalyst oxidation reactor, again carries out being oxidized, adsorbing.Because ozonizer sets, so the proofing unit arranged after adsorption unit is mainly confirmatory detection according to the detected result of drilling waste water after filtering basin.
The present invention also provides a kind of drilling wastewater treatment equipment, comprise Water Tank, oil removal plant, hydraulic jeting device, mixing device, centrifugal settling device, settling tank, filtering basin and waste residue pond, described Water Tank is connected with oil removal plant, oil removal plant is connected with hydraulic jeting device, hydraulic jeting device is connected with mixing device, mixing device is connected with centrifugal settling device, the water side of centrifugal settling device is connected to settling tank, the water side of settling tank arranges V-notch weir and is connected to filtering basin, the slag liquid outlet of centrifugal settling device and settling tank is connected to waste residue pond respectively by blow-off pipe.
Further, described oil removal plant, hydraulic jeting device, mixing device, centrifugal settling device, settling tank and filtering basin all adopt overall skid-mounted formula structure, so that drilling team's removal of home is installed.
Further, described mixing device is tube mixer, and described tube mixer comprises the 1# tube mixer and 2# tube mixer that are connected in series.
Described centrifugal settling device is cyclone separator, cyclone separator comprises the 1# cyclone separator, 2# cyclone separator, 3# cyclone separator and the 4# cyclone separator that are connected in series, 1# cyclone separator and 3# cyclone separator arrange dosing mouth respectively, and the slag liquid outlet of 1# cyclone separator, 2# cyclone separator, 3# cyclone separator and 4# cyclone separator is connected to waste residue pond respectively by blow-off pipe.
Described settling tank is tube settler, tube settler comprises 1# tube settler and the 2# tube settler of connection, V-notch weir is arranged at the water outlet of 2# tube settler, 1# tube settler is same flow precipitation pond, 2# tube settler is reverse flow settling tank, 1# tube settler and 2# tube settler the outlet of slag liquid be connected to waste residue pond respectively by blow-off pipe.
Filling cinder in described filtering basin.
Be further, the equipment of described sewage treatment technology for well drilling also comprises proofing unit, catalyst oxidation reactor and adsorption unit, described proofing unit is arranged at the downstream side of filtering basin, proofing unit is connected with catalyst oxidation reactor, catalyst oxidation reactor is connected with adsorption unit, the outlet of adsorption unit is clean relief outlet, and catalyst oxidation reactor is also connected with ozonizer.
Sorbent material in described adsorption unit is gac.
The invention has the beneficial effects as follows:
1, achieve the continuous process to drilling waste water, ensure that dosing, mixing, precipitate, go out clear water, dreg discharging liquid and carry out simultaneously, save the treatment time.
2, adopt cyclone separator and tube settler to accelerate three phase separation, after making process, water purification improves with the ratio of discharging slag liquid; On the other hand greatly shortened the sludge settling time, thus shorten the treatment time of every cubic metre of drilling waste water, improve processing power, improve processing efficiency.
3, drilling wastewater treatment equipment can process the wet goods suspended substance of light specific gravity, can solve suspended substance, clear water, slag liquid concentrates in a tank not easily separated, the especially not segregative problem of suspended substance.
4, drilling wastewater treatment equipment is by the feeding of sump pump by the drilling waste water of Water Tank, adds acid or alkali lye is uniformly mixed employing tube mixer, without the need to the power-equipment such as electric motor and agitator.
5, drilling wastewater treatment equipment adopts overall skid-mounted formula structure, is convenient to drilling team's removal of home and installs.
Accompanying drawing explanation
Fig. 1 is the structural representation of drilling wastewater treatment equipment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, sewage treatment technology for well drilling of the present invention, comprises the following steps:
A, drilling waste water is carried out oil removing by oil removal plant to drilling waste water.
Such as oil removal plant is oil trap, sends into oil removal plant by sump pump.Carry out oil removing to drilling waste water, avoid and pollute follow up device, the oil after oil removing to recycle.
The pH value of B, test drilling waste water, adds soda acid agent according to the pH value of drilling waste water and mixes, regulating pH value to 6 ~ 9 of drilling waste water.
Get drilling waste water by pH meter or test paper test test potential of hydrogen, add acid or alkali according to pH value, be uniformly mixed abundant neutralization, the amount that need add when record unit drilling waste water pH value reaches 6-9, such as preferably be neutralized to the acid of pH=7 or the add-on of alkali, as the foundation of adding acid or alkali.The hydraulic jeting device that is added with of acid or alkali is implemented, and according to pH value and the influx of drilling waste water, the valve of acid solution or alkali lye is added in adjustment, and by dosing pump, automatic or manual acid liquid or alkali lye are in hydraulic jeting device, neutralize drilling waste water.
Drilling waste water enters 1# tube mixer after adding acid solution or alkali lye by hydraulic jeting device, then enters 2# tube mixer and fully mix.
C, in drilling waste water, add coagulating agent and centrifugal settling, polymeric treating agent is added and centrifugal settling again in drilling waste water, add coagulating agent to carry out centrifugal settling and add polymeric treating agent (flocculation agent) carrying out centrifugal settling, the slag liquid produced is discharged respectively by blow-off pipe.
The outlet of 2# tube mixer connects 1# cyclone separator, 2# cyclone separator in sequential series, 3# cyclone separator and 4# cyclone separator after 1# cyclone separator, and drilling waste water adds coagulating agent when entering 1# cyclone separator, drilling waste water adds polymeric treating agent when entering 3# cyclone separator, i.e. flocculation agent, the slag liquid that each cyclone separator produces enters waste residue pond respectively by blow-off pipe.
Coagulating agent is a class material, comprises organic, inorganic and high molecular, as poly-aluminium, iron(ic) chloride, bodied ferric sulfate etc. can.The addition of coagulating agent and polymeric treating agent can be determined according to following method, coagulating agent and polymeric treating agent are configured to respectively the aqueous solution of 10%, in the drilling waste water sample after neutralization, first add coagulant solution and stir, within two minutes, add polymeric treating agent later, low rate mixing, observe sewage response situation, strengthen according to response situation or reduce the dosage of medicament, coagulating agent and polymeric treating agent needed for unit drilling waste water is drawn with this, and as adding the basis of coagulating agent and polymeric treating agent.
Interpolation coagulating agent and polymeric treating agent, respectively by dosing pump Automatic Dosing, only need respectively chemical feeding quantity to be transferred to required numerical value.Dosing pump can operate manually or automatically, and dosing pump is under automatic operation mode, and after drilling waste water enters, namely dosing pump operates automatically according to set(ting)value.
Add coagulating agent and suck air simultaneously, drilling waste water and air mix and produce air supporting in each cyclone separator, many micro-bubbles that air supporting is formed overflow from the top of cyclone separator, take away drilling waste water and add the oil of light specific gravity in medicament composition mixed solution and many small suspended substances.
D, drilling waste water enter tube settler and precipitate, and the slag liquid that tube settler produces is discharged by blow-off pipe.
Tube settler comprises 1# tube settler and the 2# tube settler of connection, drilling waste water enters 1# tube settler after above-mentioned 4# cyclone separator flows out, connection position again in the middle part of 1# tube settler and 2# tube settler enters 2# tube settler, and 2# tube settler water outlet arranges V-notch weir.Described 1# tube settler is same flow precipitation pond, and 2# tube settler is reverse flow settling tank.
E, drilling waste water enter filtering basin from the V-notch weir of 2# tube settler and filter.
Filling cinder or other filtering medium in described filtering basin.Generally can reach national sewage comprehensive emission standard GB8978-96 primary standard by the drilling waste water water quality after filtering basin filtration treatment, directly can carry out reuse or direct outer row.In order to ensure that the drilling waste water water quality after processing meets national sewage comprehensive emission standard GB8978-96 primary standard, next step detection also to be carried out.
F, the drilling waste water after filtering to be detected, directly outer row up to standard, below standard after fully oxidized, absorption outer row again.
Drilling waste water through filtration treatment is detected, reach the directly exclusive of national sewage comprehensive emission standard GB8978-96 primary standard or reuse, after the carrying out reaching national sewage comprehensive emission standard GB8978-96 primary standard be oxidized, adsorb, detect up to standard after exclusive or reuse again.
Below standard drilling waste water is arranged sequentially through outer again after catalyst oxidation reactor, adsorption unit, and described catalyticreactor is connected with ozonizer.Do not reach national composite wastewater discharge primary standard, ozonizer is regulated according to this detected result, ozonizer is connected with catalyst oxidation reactor, drilling waste water is undertaken fully oxidized by catalyst oxidation reactor, through adsorption device adsorbs, detect through proofing unit again, reach the directly outer of national composite wastewater discharge primary standard arrange or carry out reuse, the drilling waste water not meeting national composite wastewater discharge primary standard is back to catalyst oxidation reactor, again carries out being oxidized, adsorbing.Sorbent material in adsorption unit is gac.
Because ozonizer sets, so the proofing unit arranged after adsorption unit is mainly confirmatory detection according to the detected result of drilling waste water after filtering basin.
As shown in Figure 1, the present invention also provides a kind of equipment realizing above-mentioned sewage treatment technology for well drilling.Drilling wastewater treatment equipment, comprise Water Tank, oil removal plant, hydraulic jeting device, mixing device, centrifugal settling device, settling tank, filtering basin and waste residue pond, described Water Tank is connected with oil removal plant, oil removal plant is connected with hydraulic jeting device, hydraulic jeting device is connected with mixing device, mixing device is connected with centrifugal settling device, the water side of centrifugal settling device is connected to settling tank, the water side of settling tank arranges V-notch weir and is connected to filtering basin, and the slag liquid outlet of centrifugal settling device and settling tank is connected to waste residue pond respectively by blow-off pipe.
Described mixing device is tube mixer, and tube mixer is at least one, and such as described tube mixer is the 1# tube mixer and 2# tube mixer that are connected in series.
Described centrifugal settling device is cyclone separator, cyclone separator is at least two, each cyclone separator is connected in series, and two cyclone separators arrange coagulating agent and polymeric treating agent dosing mouth respectively wherein, coagulating agent dosing mouth is positioned at the upstream side of polymeric treating agent dosing mouth.Such as cyclone separator is the 1# cyclone separator, 2# cyclone separator, 3# cyclone separator and the 4# cyclone separator that are connected in series, 1# cyclone separator is arranged coagulating agent dosing mouth, 3# cyclone separator is arranged polymeric treating agent dosing mouth, the slag liquid outlet of 1# cyclone separator, 2# cyclone separator, 3# cyclone separator and 4# cyclone separator is connected to waste residue pond respectively by blow-off pipe.
Described settling tank is tube settler, tube settler comprises 1# tube settler and the 2# tube settler of connection, V-notch weir is arranged at the water outlet of 2# tube settler, 1# tube settler is same flow precipitation pond, 2# tube settler is reverse flow settling tank, 1# tube settler and 2# tube settler the outlet of slag liquid be connected to waste residue pond respectively by blow-off pipe.
The blow-off pipe of each cyclone separator above-mentioned and the blow-off pipe of each tube settler enter waste residue pond individually, enter waste residue pond again after also can converging.When each tube settler pond depth of water reaches 2/3, open sewage draining valve, according to the color adjustment valve size of drilling waste water, when drilling waste water color is thin out, close minor valve.
Drilling waste water in 2# tube settler enters filtering basin after V-notch weir collects, filling filtering medium in filtering basin, such as, be cinder.The outer draining emission standard of national regulation can be reached by the clear water after cinder filtration process completely, reuse or direct outer row can be carried out.
For the ease of dismounting, the installation of drilling wastewater treatment equipment, described oil removal plant, hydraulic jeting device, tube mixer, cyclone separator, tube settler and and filtering basin all preferably adopt overall skid-mounted formula structure.
In order to ensure that the drilling waste water filtered through filtering basin meets the outer draining emission standard of national regulation, drilling wastewater treatment equipment, equipment also comprises proofing unit, catalyst oxidation reactor and adsorption unit, described proofing unit is arranged at the downstream side of filtering basin, proofing unit is connected with catalyst oxidation reactor, catalyst oxidation reactor is connected with adsorption unit, and the outlet of adsorption unit is clean relief outlet, and catalyst oxidation reactor is also connected with ozonizer.Detect below standard drilling waste water to arrange sequentially through outer again after catalyst oxidation reactor, adsorption unit, ozonizer is regulated according to this detected result, carry out fully oxidized to below standard drilling waste water, through adsorption device adsorbs, can process be completed, reach the outer draining emission standard of national regulation.
The downstream side of described adsorption unit arranges proofing unit in addition, reach the directly outer of national composite wastewater discharge primary standard arrange or carry out reuse, the drilling waste water not meeting national composite wastewater discharge primary standard is back to catalyst oxidation reactor, again carries out being oxidized, adsorbing.Sorbent material in adsorption unit is gac.
Water purification through above-mentioned process can carry out selective use according to the height of its saltiness, and high salinity water purification is back to drilling well after can be used for salt manufacturing, and Low-salinity water purification can be used for greening vegetation etc.

Claims (10)

1. sewage treatment technology for well drilling, is characterized in that, comprises the following steps:
A, by oil removal plant, oil removing is carried out to drilling waste water;
The pH value of B, test drilling waste water, adds acid or alkali according to the pH value of drilling waste water and mixes, regulating pH value to 6 ~ 9 of drilling waste water;
C, in drilling waste water, add coagulating agent and centrifugal settling, the slag liquid that centrifugal settling produces is discharged by blow-off pipe;
D, drilling waste water enter settling tank and precipitate, and the slag liquid that settling tank produces is discharged by blow-off pipe;
E, drilling waste water enter filtering basin from settling tank and filter;
F, the drilling waste water after filtering to be detected, directly outer row up to standard, below standard after fully oxidized, absorption outer row again.
2. sewage treatment technology for well drilling as claimed in claim 1, is characterized in that: in described step B, adds acid or alkali by hydraulic jeting device in drilling waste water.
3. sewage treatment technology for well drilling as claimed in claim 1, it is characterized in that: in described step B, mixed by tube mixer, described tube mixer comprises the 1# tube mixer and 2# tube mixer that are connected in series.
4. sewage treatment technology for well drilling as claimed in claim 1, it is characterized in that: in described step C, the device that centrifugal settling uses is cyclone separator, described cyclone separator is at least two, and drilling waste water adds coagulating agent through arbitrary cyclone separator, while adding coagulating agent, suck air.
5. sewage treatment technology for well drilling as claimed in claim 1, it is characterized in that: in described D step, settling tank is tube settler, described tube settler comprises 1# tube settler and the 2# tube settler of connection, 2# tube settler water outlet arranges V-notch weir, and drilling waste water first flows into 1# tube settler, then flows into 2# tube settler, described 1# tube settler is same flow precipitation pond, and 2# tube settler is reverse flow settling tank.
6. sewage treatment technology for well drilling as claimed in claim 1, is characterized in that: in described F step, and below standard drilling waste water is arranged sequentially through outer again after catalyst oxidation reactor, adsorption unit.
7. drilling wastewater treatment equipment, it is characterized in that: comprise Water Tank, oil removal plant, hydraulic jeting device, mixing device, centrifugal settling device, settling tank, filtering basin and waste residue pond, described Water Tank is connected with oil removal plant, oil removal plant is connected with hydraulic jeting device, hydraulic jeting device is connected with mixing device, mixing device is connected with centrifugal settling device, the water side of centrifugal settling device is connected to settling tank, the water side of settling tank arranges V-notch weir and is connected to filtering basin, the slag liquid outlet of centrifugal settling device and settling tank is connected to waste residue pond respectively by blow-off pipe.
8. drilling wastewater treatment equipment as claimed in claim 7, is characterized in that: described oil removal plant, hydraulic jeting device, mixing device, centrifugal settling device, settling tank and filtering basin all adopt overall skid-mounted formula structure.
9. drilling wastewater treatment equipment as claimed in claim 7, is characterized in that:
Described mixing device is tube mixer, and described tube mixer comprises the 1# tube mixer and 2# tube mixer that are connected in series;
Described centrifugal settling device is cyclone separator, cyclone separator comprises the 1# cyclone separator, 2# cyclone separator, 3# cyclone separator and the 4# cyclone separator that are connected in series, 1# cyclone separator and 3# cyclone separator arrange dosing mouth respectively, and the slag liquid outlet of 1# cyclone separator, 2# cyclone separator, 3# cyclone separator and 4# cyclone separator is connected to waste residue pond respectively by blow-off pipe;
Described settling tank is tube settler, tube settler comprises 1# tube settler and the 2# tube settler of connection, V-notch weir is arranged at the water outlet of 2# tube settler, 1# tube settler is same flow precipitation pond, 2# tube settler is reverse flow settling tank, 1# tube settler and 2# tube settler the outlet of slag liquid be connected to waste residue pond respectively by blow-off pipe.
10. drilling wastewater treatment equipment as claimed in claim 7, it is characterized in that: the equipment of described sewage treatment technology for well drilling also comprises proofing unit, catalyst oxidation reactor and adsorption unit, described proofing unit is arranged at the downstream side of filtering basin, proofing unit is connected with catalyst oxidation reactor, catalyst oxidation reactor is connected with adsorption unit, the outlet of adsorption unit is clean relief outlet, and catalyst oxidation reactor is also connected with ozonizer.
CN201510223499.7A 2015-05-05 2015-05-05 Sewage treatment technology and equipment for well drilling Active CN104773880B (en)

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CN108585278A (en) * 2018-05-16 2018-09-28 延安双丰石油技术股份有限公司 A kind of waste liquid of drilling processing system
CN111826138A (en) * 2019-04-15 2020-10-27 中国石油天然气股份有限公司 Drilling fluid preparation method
CN111826138B (en) * 2019-04-15 2022-06-03 中国石油天然气股份有限公司 Drilling fluid preparation method

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