CN108751500A - A kind of oil field compression fracture returns drain processing system and method - Google Patents

A kind of oil field compression fracture returns drain processing system and method Download PDF

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Publication number
CN108751500A
CN108751500A CN201810620871.1A CN201810620871A CN108751500A CN 108751500 A CN108751500 A CN 108751500A CN 201810620871 A CN201810620871 A CN 201810620871A CN 108751500 A CN108751500 A CN 108751500A
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China
Prior art keywords
unit
coagulation
tank
oil
integration
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CN201810620871.1A
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Chinese (zh)
Inventor
李�荣
聂俊博
邓焱伟
高则彬
代显才
王彦斌
何世全
马超
张贵莲
王金亮
王涛
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KARAMAY SANDA NEW TECHNOLOGY Co Ltd
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KARAMAY SANDA NEW TECHNOLOGY Co Ltd
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Priority to CN201810620871.1A priority Critical patent/CN108751500A/en
Publication of CN108751500A publication Critical patent/CN108751500A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/002Construction details of the apparatus
    • C02F2201/007Modular design
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions

Abstract

The present invention discloses a kind of oil field compression fracture and returns drain processing system and method, system includes pretreatment unit, coagulation clean unit, filtering buffer cell and the integration apparatus unit being attached successively by pipeline, pretreatment unit is also associated with carrys out liquid pipe line for be passed through wellfracturing anti-drain, carrys out on liquid pipe line to be connected with pretreating agent chemicals dosing plant;Water purification agent chemicals dosing plant is provided on pipeline between pretreatment unit and coagulation clean unit, coagulation clean unit is also associated with flocculant chemicals dosing plant, and the water outlet of integration apparatus unit is connected with treated water tank;The bottom of coagulation clean unit, filtering buffer cell and integration apparatus unit is all connected with pressure mud device unit.The characteristics of present invention process is simple, and each unit design closely combines produced on-site, purified treatment amount is big, and treatment effeciency is high, can reach the expected of technique productions and requires, to save production cost, increase economic benefit, significant contribution is made that for oil field environment-protection.

Description

A kind of oil field compression fracture returns drain processing system and method
Technical field
The present invention relates to sewage disposal purification techniques fields, and in particular to a kind of oil field compression fracture returns drain processing system and side Method.
Background technology
Currently, being a major measure of oil well production increasing in Oilfield Operation District fracturing technology, most of oil fields generally use. The most commonly used is aqueous fracturing fluids, it has the characteristics that high viscosity, low frictional resistance, outstanding grittiness are good, small to formation damage, now Have become main fracturing fluid type.However the fracturing waste liquor generated during wellfracturing has pollutant, complicated component, concentration High, large viscosity, intractability is big, is one of more intractable sewage in oil field.It is directly entered gathering and transferring process if do not handled, can seriously be done Follow-up process is disturbed, oil field production is seriously affected, causes equipment to block, oil field declines, the environmental protection problems such as not up to standard.
Oilfield Operation District well head it is counter go out liquid, liquid measure is in 800m at present3/ d, peak value liquid measure 1100m3/d.It returns row pressure and splits in the part Sewage composition is complicated, and concentration is high, and viscosity is big, and intractability increases therewith, by fracturing outlet liquid 80-90m3/ d, which is returned, to be mixed to the oil field Operation area thin oil sewage disposal system causes retort effluent quality filtration difficulty, suspended matter to go up, and oil-containing increases, in grain size Value increases, and corrosion rate becomes larger;Filter filtration pressure difference is big, and water amount reduces, and has gluey hardened object to occur in filtering layer, to the work Industry sound zone system normal operation causes extreme influence.Disposal options are invalid reservoir profile control re-injection at present, but by re-injection pressure rise Influence, reinjection well selects well difficult, while the Oilfield Operation District coming years return lifting rate Continued, predicts following 1 year total water Measure 200,000 sides, day peak volume 1500m3, re-injection difficulty is big, after being badly in need of preferred suitable treatment technology to the part of contaminated water individually processing Re-injection.
Therefore it provides a kind of oil field compression fracture returns drain processing system and method, it is above-mentioned present in the prior art to eliminate Disadvantage becomes present technical problem urgently to be resolved hurrily.
Invention content
The object of the present invention is to provide a kind of oil field compression fractures to return drain processing system and method, to solve the above-mentioned prior art There are the problem of, the pollutants such as suspended matter, oil-containing, solid particulate matter in fracturing outlet liquid waste water are effectively separated;Energy Median particle size, corrosion rate, liquid viscosity and suction filtration time are reduced within acceptability limit, fracturing outlet liquid wastewater treatment is made After reach injected index.
To achieve the above object, the present invention provides following schemes:A kind of oil field compression fracture of present invention offer returns drain processing System includes that the pretreatment unit being attached successively by pipeline, coagulation clean unit, filtering buffer cell and integration are set Standby unit, the pretreatment unit is also associated with carrys out liquid pipe line for be passed through wellfracturing anti-drain, it is described come liquid pipe line on It is connected with pretreating agent chemicals dosing plant;It is provided with water purification on pipeline between the pretreatment unit and the coagulation clean unit Agent chemicals dosing plant, the coagulation clean unit are also associated with flocculant chemicals dosing plant, the water outlet of the integration apparatus unit It is connected with treated water tank;The bottom of the coagulation clean unit, filtering buffer cell and integration apparatus unit is all connected with pressure Mud device unit.
Preferably, the pretreatment unit includes pretreatment reaction tank, the import of the pretreatment reaction tank with it is described come Liquid pipe line connects, and outlet is connect by pipeline with the coagulation clean unit.
Preferably, the coagulation clean unit includes sequentially connected inlet tank, settling tank, coagulation reaction tank, sedimentation point From pond and water tank, the inlet tank is connect with the outlet of the pretreatment unit, and the water tank and filtering buffering are single Member connection.
Preferably, the bottom in the settling tank and sedimentation separation pond is connect with the pressure mud device unit.
Preferably, the integration apparatus unit includes initial filter system, refined filtration system and the circulatory system, and the integration is set The bottom of standby unit is connect with the filtering buffer cell, and top is connect with the treated water tank.
Preferably, the integration apparatus unit is also connected with backwash unit by pipeline.
Preferably, the pressure mud device unit includes the sludge tank being attached by pipeline and pressure mud machine, the sludge The import of tank is connected by the bottom of blowdown pipeline and the coagulation clean unit, filtering buffer cell and integration apparatus unit It connects, the pressure mud machine connects the pretreatment unit by pipeline and sewage pump.
The invention also discloses a kind of oil field compression fractures that the above-mentioned oil field compression fracture of reference returns drain processing system to return drain processing Method includes the following steps:
1) it, pre-processes:The dosage for having debugged pretreating agent will be pre-processed by pretreating agent chemicals dosing plant by dosing pump What agent was delivered to pretreatment unit carrys out liquid pipe line, is beaten to pretreatment reaction tank by carrying out liquid elevator pump and carries out pretreatment reaction;
2), coagulation purifies:The reacted elevator pump of fracturing outlet liquid waste liquid after pretreatment reaction is carried out to beat to coagulation purification Unit, while water purification agent is added by water purification agent chemicals dosing plant, the waste liquid for having been added to water purification agent is introduced into inlet tank, then into Enter settling tank and carry out sedimentation separation, subsequently enter coagulation reaction tank, enters back into sedimentation separation pond and carry out sedimentation separation, pass through flocculation Flocculant is added in agent chemicals dosing plant, settles the sludge that bottom generates twice and is delivered to pressure mud device unit, the water outlet of sedimentation separation pond Into water tank, filtering buffer cell is delivered to by water tank;
3), filtering buffering:Fracturing outlet liquid water outlet by coagulation purification is beaten by elevator pump to filtering buffer cell Surge tank is filtered, fine suspension, oil-containing and coloration in fracturing outlet liquid water outlet, filtering buffering pot bottom production are further removed Raw sludge is delivered to pressure mud device unit;
4), advanced treating:Filter buffer cell fracturing outlet liquid water outlet by pipelined to integration apparatus unit into Row advanced treating, fracturing outlet liquid initially enter initial filter system and carry out initial filter processing, enter back into refined filtration system and carry out refined filtration, filtering There are mechanical rotations for internal system, so that treatment liquid quick rotation is operated with the circulatory system, while generating centrifugal force to make Oils free in liquid, waste residue are detached with liquid, fracturing outlet liquid enters from the bottom of integration apparatus unit, on Portion is discharged into treated water tank;Waste residue, the sludge of advanced treating generation are delivered to pressure mud device unit;
5), backwash:Integration apparatus unit is backwashed by backwash unit, backwash remains in filter Waste residue is discharged into blowdown pipeline and is delivered to pressure mud device unit together after backwash is complete;
6), pressure mud processing:Sludge is first entered into sludge tank and launches dehydrating agent dehydration, then is sent to pressure mud machine processing, mud is pressed Machine dehydration is delivered to pretreatment unit circular treatment through sewage pump.
The present invention achieves following technique effect compared with the existing technology:
The present invention can effectively be divided the pollutants such as suspended matter, oil-containing, solid particulate matter in fracturing outlet liquid waste water From;Median particle size, corrosion rate, liquid viscosity and suction filtration time can be reduced within acceptability limit, keep fracturing outlet liquid useless Reach injected index after water process, greatly improves the value of waste liquid re-using;Integration apparatus unit is in initial filter and refined filtration While with the circulatory system operation, effectively filter layer can be made to regenerate, removal waste residue, sludge is thorough, presses mud device unit The sludge etc. that purification sedimentation, coagulant precipitation and integration apparatus generate is handled again, prevents discharge of poisonous waste, is provided Source is utilized effectively.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings Obtain other attached drawings.
Fig. 1 is the flow chart that oil field compression fracture of the present invention returns drain processing system;
Fig. 2 is the structural schematic diagram of coagulation clean unit of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of oil field compression fractures to return drain processing system and method, to solve prior art presence The problem of, the pollutants such as suspended matter, oil-containing, solid particulate matter in fracturing outlet liquid waste water are effectively separated;It can be by grain Diameter intermediate value, corrosion rate, liquid viscosity and suction filtration time are reduced within acceptability limit, are reached after making fracturing outlet liquid wastewater treatment To injected index.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real Applying mode, the present invention is described in further detail.
As shown in Figure 1, a kind of oil field compression fracture of present invention offer returns drain processing system, including connected successively by pipeline Pretreatment unit, coagulation clean unit, filtering buffer cell and integration apparatus unit, the pretreatment unit connect is also associated with use Carry out liquid pipe line in be passed through wellfracturing anti-drain, carrys out on liquid pipe line to be connected with pretreating agent chemicals dosing plant;Pretreatment unit with Water purification agent chemicals dosing plant is provided on pipeline between coagulation clean unit, coagulation clean unit is also associated with flocculant dosing dress It sets, the water outlet of integration apparatus unit is connected with treated water tank;Coagulation clean unit, filtering buffer cell and integration are set The bottom of standby unit is all connected with pressure mud device unit.
It is respectively connected on three pretreating agent chemicals dosing plant, water purification agent chemicals dosing plant and flocculant chemicals dosing plant chemicals dosing plants Dosing pump controls the addition of medicament by dosing pump, and the lower end of dosing pump is also equipped with flowmeter, is supervised to the flow of medicament Control.Three kinds of medicaments are all made of the special purification medicament of fracturing outlet liquid, embody to a certain extent medicament superiority and specially One property.
Pretreatment unit includes pretreatment reaction tank, and the import of pretreatment reaction tank is connect with liquid pipe line is carried out, and outlet passes through Pipeline is connect with coagulation clean unit.
As shown in Fig. 2, coagulation clean unit includes sequentially connected inlet tank, settling tank, coagulation reaction tank, sedimentation separation The outlet of pond and water tank, inlet tank and pretreatment unit connects, and water tank is connect with filtering buffer cell, settling tank and sedimentation The bottom of separate tank is connect by blowdown pipeline with pressure mud device unit, in order to which the sludge of sedimentation bottom generation twice is defeated It send to pressure mud device unit and is handled.
The main body of integration apparatus unit is a more medium filter, is existing mature technology, including preliminary filter, refined filtration Pond and the circulatory system, preliminary filter and refined filtration pond are arranged from the bottom to top, and bottom and the filtering buffer cell of integration apparatus unit connect It connects, realizes that bottom water inlet, top are connect with treated water tank, the fracturing outlet liquid for carrying out advanced treating is delivered to treated water tank, And it is discharged by treated water tank and cesspool is delivered to by output pump.The circulatory system includes filter tank, material pump and Inlet and outlet water pipeline, backwash In the process by expecting that pump extracts filtrate in filter tank out, external cleaning and regeneration is carried out, is then pumped into filter tank again, realizes filtrate cycle It uses.
The inside in filter tank, by mechanical rotation, keeps treatment liquid quick there is also having mechanical rotation device, such as agitating paddle Rotation is operated with the circulatory system, while generating centrifugal force and oils free in liquid, waste residue are detached with liquid, Equipment stopping is not needed, you can the blowdown pipeline that the waste residue of processing generation, sludge are discharged into bottom is delivered to pressure mud device together Unit completes the cleaning work of generated waste residue, sludge etc.;And effectively filter layer can be made to regenerate, resource obtains effectively It utilizes.
Integration apparatus unit is also connected with backwash unit by pipeline, and backwash unit is led to using common anti-washer It crosses anti-washer backwash and remains in waste residue in filter, blowdown pipeline is discharged into after backwash is complete and is delivered to pressure mud device together Unit, backwash unit backwash sewage can also be sent by output pump to pretreatment unit circular treatment.
Pressure mud device unit includes that the sludge tank being attached by pipeline and pressure mud machine, the import of sludge tank pass through blowdown Pipeline is connect with the bottom of coagulation clean unit, filtering buffer cell and integration apparatus unit, in order to which sludge to be discharged into Into sludge tank, pressure mud machine connects pretreatment unit by pipeline and sewage pump, and pressure mud machine dehydration is delivered to pre- through sewage pump Processing unit circular treatment.
The invention also discloses a kind of oil field compression fractures that the above-mentioned oil field compression fracture of reference returns drain processing system to return drain processing Method includes the following steps:
1) it, pre-processes:The dosage for having debugged pretreating agent will be pre-processed by pretreating agent chemicals dosing plant by dosing pump What agent was delivered to pretreatment unit carrys out liquid pipe line, is beaten to pretreatment reaction tank by carrying out liquid elevator pump and carries out pretreatment reaction;
2), coagulation purifies:The reacted elevator pump of fracturing outlet liquid waste liquid after pretreatment reaction is carried out to beat to coagulation purification Unit, at the same by water purification agent chemicals dosing plant toward enter coagulation clean unit pipeline on water purification agent is added, have been added to water purification The waste liquid of agent is introduced into inlet tank, subsequently enters settling tank and carries out sedimentation separation, subsequently enters coagulation reaction tank, enter back into sedimentation Separate tank carries out sedimentation separation, and flocculant is added into coagulation clean unit by flocculant chemicals dosing plant;Pass through the net of addition Aqua and flocculant realize coagulation purification reaction, can remove a large amount of suspended matter and oil-containing, settle the dirt that bottom generates twice Mud is delivered to pressure mud device unit, and the water outlet of sedimentation separation pond enters water tank, filtering buffer cell is delivered to by water tank;
3), filtering buffering:Fracturing outlet liquid water outlet by coagulation purification is beaten by elevator pump to filtering buffer cell Surge tank is filtered, fine suspension, oil-containing, coloration and other substances in fracturing outlet liquid water outlet are further removed, filtering is slow The sludge for rushing pot bottom generation is delivered to pressure mud device unit;
4), advanced treating:Filter buffer cell fracturing outlet liquid water outlet by pipelined to integration apparatus unit into Row advanced treating, the preliminary filter that fracturing outlet liquid initially enters initial filter system carry out initial filter processing, enter back into refined filtration pond and carry out essence Filter, there are mechanical rotations inside filtration system, and treatment liquid quick rotation is made to be operated with the circulatory system, at the same generate from Mental and physical efforts make free oils in liquid, waste residue be detached with liquid, fracturing outlet liquid from the bottom of integration apparatus unit into Enter, middle and upper part is discharged into treated water tank;Waste residue, the sludge of advanced treating generation are delivered to pressure mud device unit;
5), backwash:Integration apparatus unit is backwashed by backwash unit, backwash remains in filter Waste residue is discharged into blowdown pipeline and is delivered to pressure mud device unit together after backwash is complete;
6), pressure mud processing:By coagulation clean unit, integration apparatus unit and the fracturing outlet liquid for filtering buffer cell Waste water is run in processing procedure, can settle a large amount of sludge and waste residue in reactor bottom, the sludge and give up that sedimentation, backwash generate Slag conveying sludge tank enters pressure mud machine after collecting;Sludge launches dehydrating agent dehydration after entering sludge tank, then send to pressure mud machine processing, Pressure mud machine dehydration is delivered to pretreatment unit circular treatment through sewage pump.
In the present invention oil field compression fracture return drain processing system combination site technology operational process experiment it is as follows:
(1) prepare respectively the pretreating agent of 200~600mg/L concentration, the water purification agent of 300~1000mg/L concentration, 4~ The flocculant of 15mg/L;In conjunction with the water quality condition in live operational process, coming liquid and processing system water outlet, live Water purification medicament adds Amount is adjusted stage by stage, and the determination of dosing is to study based on beaker experiments indoors so that it is determined that preliminary dosage, then It is constantly debugged by being tested in operation in scene, to choose best dosage to meet production requirement, the above pretreating agent, Water purification agent, flocculant concentration are optimal addition dosage.
(2) before the operation area does not use processing system of the present invention, onsite application original technique and equipment are supervised according to scene Measured data shows, suspended matter is averaged 54mg/L, and oil-containing is averaged 81.9mg/L, and 10mL filters time average out to 735s, median particle size 2.90 μm, instantaneous flow 11.71m3;The operation area fracturing outlet liquid monitoring indices are all to severely exceed, process Produced on-site demand cannot be met, it is now that the data before the unused present invention are as shown in table 1:
Table 1 does not use field operational data before the present invention
(3) present invention experiment uses the treatment process of pretreatment+coagulant precipitation+filtering, to the operation area fracturing outlet liquid Carry out re-injection processing up to standard.30m × 30m is taken up an area in place, and processing technological flow is as shown in Fig. 1, design treatment amount 10m3/ h, is opened The pretreating agent for adding 200mg/L after live running equipment in pretreatment unit is opened, is pre-processed into row buffering, by 300mg/L's The purifier purification sedimentation of coagulation clean unit is added in water purification agent, and the flocculant of 4mg/L is added to the wadding of coagulation clean unit Solidifying reaction unit flocculating setting;Water outlet field sampling by filtering buffer cell and integration apparatus unit carries out indices Detection, field monitoring data are as shown in table 2:
2 field pilot test test run data of table
By live operational monitoring in 15 days, water quality detection the result shows that, (100mL/s) filter time≤120/s;It filters The above time, suspension content, oil content were constantly in steady state up to standard within index.According to field monitoring result tune Flocculant, water purification agent dosage are tried, after dosage is debugged, filters time held stationary state, the requirement of Pass Test technology; In short, site of deployment pilot scale purifying water effect of the present invention has reached desired effect.
Since the Oilfield Operation District uses the present invention, the qualified re-injection of fracturing outlet liquid processing has become normalization, from now Suspension content from the point of view of the monitoring data of field:≤7mg/L;Oil-containing:≤3mg/L;Median particle size:≤1μm;Corrosion rate≤ 0.076mm/a;The 100ml water sample suction filtration times:≤ 2min (filter membrane average pore size is 0.45 μm);The Oilfield Operation District pressure break returns row Liquid direct purification processing reinjection technique becomes current practical technique, brings income for oilfield stimulation, solves oil field operation Fracturing outlet liquid intractability big problem in area's is made that contribution for oil field environment-protection.
Specific case is applied in the present invention, and principle and implementation of the present invention are described, above example Illustrate the method and its core concept for being merely used to help understand the present invention;Meanwhile for those of ordinary skill in the art, according to According to the thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification It should not be construed as limiting the invention.

Claims (8)

1. a kind of oil field compression fracture returns drain processing system, it is characterised in that:It include the pretreatment being attached successively by pipeline Unit, coagulation clean unit, filtering buffer cell and integration apparatus unit, the pretreatment unit are also associated with for being passed through Wellfracturing anti-drain carrys out liquid pipe line, it is described come liquid pipe line on be connected with pretreating agent chemicals dosing plant;The pretreatment unit Water purification agent chemicals dosing plant is provided on pipeline between the coagulation clean unit, the coagulation clean unit is also associated with wadding Solidifying agent chemicals dosing plant, the water outlet of the integration apparatus unit are connected with treated water tank;The coagulation clean unit, filtering are slow The bottom for rushing unit and integration apparatus unit is all connected with pressure mud device unit.
2. oil field compression fracture according to claim 1 returns drain processing system, it is characterised in that:The pretreatment unit includes Pretreatment reaction tank, the import of the pretreatment reaction tank with it is described come liquid pipe line connect, outlet passes through pipeline and the coagulation Clean unit connects.
3. oil field compression fracture according to claim 2 returns drain processing system, it is characterised in that:The coagulation clean unit packet Include sequentially connected inlet tank, settling tank, coagulation reaction tank, sedimentation separation pond and water tank, the inlet tank and the pre- place The outlet connection of unit is managed, the water tank is connect with the filtering buffer cell.
4. oil field compression fracture according to claim 3 returns drain processing system, it is characterised in that:The settling tank and sedimentation point It is connect with the pressure mud device unit from the bottom in pond.
5. oil field compression fracture according to claim 4 returns drain processing system, it is characterised in that:The integration apparatus unit Including initial filter system, refined filtration system and the circulatory system, the bottom of the integration apparatus unit connects with the filtering buffer cell It connects, top is connect with the treated water tank.
6. oil field compression fracture according to claim 5 returns drain processing system, it is characterised in that:The integration apparatus unit Backwash unit is also connected with by pipeline.
7. oil field compression fracture according to claim 6 returns drain processing system, it is characterised in that:The pressure mud device unit packet The sludge tank being attached by pipeline and pressure mud machine are included, the import of the sludge tank is purified by blowdown pipeline and the coagulation The bottom connection of unit, filtering buffer cell and integration apparatus unit, the pressure mud machine are connected by pipeline and sewage pump Connect the pretreatment unit.
8. a kind of oil field compression fracture that reference oil field compression fracture as claimed in any one of claims 1 to 6 returns drain processing system returns drain Processing method, it is characterised in that:Include the following steps:
1) it, pre-processes:The dosage for having debugged pretreating agent, it is by dosing pump that pretreating agent is defeated by pretreating agent chemicals dosing plant It send to pretreatment unit and carrys out liquid pipe line, beaten to pretreatment reaction tank progress pretreatment reaction by carrying out liquid elevator pump;
2), coagulation purifies:The reacted elevator pump of fracturing outlet liquid waste liquid after pretreatment reaction is carried out to beat to coagulation clean unit, Water purification agent is added by water purification agent chemicals dosing plant simultaneously, the waste liquid for having been added to water purification agent is introduced into inlet tank, and it is heavy to subsequently enter Drop pond and carry out sedimentation separation, subsequently enter coagulation reaction tank, enter back into sedimentation separation pond and carry out sedimentation separation, by flocculant plus Flocculant is added in medicine device, settles the sludge that bottom generates twice and is delivered to pressure mud device unit, the water outlet of sedimentation separation pond enters Water tank is delivered to filtering buffer cell by water tank;
3), filtering buffering:Fracturing outlet liquid water outlet by coagulation purification is beaten by elevator pump to the filtering of filtering buffer cell Surge tank, further removes fine suspension, oil-containing and coloration in fracturing outlet liquid water outlet, and filtering buffering pot bottom generates Sludge is delivered to pressure mud device unit;
4), advanced treating:The fracturing outlet liquid water outlet for filtering buffer cell is carried out deeply by pipelined to integration apparatus unit Degree processing, fracturing outlet liquid initially enter initial filter system and carry out initial filter processing, enter back into refined filtration system and carry out refined filtration, filtration system There are mechanical rotations for inside, so that treatment liquid quick rotation is operated with the circulatory system, while generating centrifugal force and making liquid Free oils, waste residue are detached with liquid in body, and fracturing outlet liquid enters from the bottom of integration apparatus unit, middle and upper part row Go out to enter treated water tank;Waste residue, the sludge of advanced treating generation are delivered to pressure mud device unit;
5), backwash:Integration apparatus unit is backwashed by backwash unit, backwash remains in useless in filter Slag is discharged into blowdown pipeline and is delivered to pressure mud device unit together after backwash is complete;
6), pressure mud processing:Sludge is first entered into sludge tank and launches dehydrating agent dehydration, then is sent to pressure mud machine processing, pressure mud machine is de- Water is delivered to pretreatment unit circular treatment through sewage pump.
CN201810620871.1A 2018-06-15 2018-06-15 A kind of oil field compression fracture returns drain processing system and method Pending CN108751500A (en)

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CN111547880A (en) * 2020-05-11 2020-08-18 克拉玛依市三达新技术股份有限公司 Oil field well head fracturing flow-back liquid wastewater treatment system

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