CN107176731A - Fracturing outlet liquid processing unit and method - Google Patents
Fracturing outlet liquid processing unit and method Download PDFInfo
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- CN107176731A CN107176731A CN201610133355.7A CN201610133355A CN107176731A CN 107176731 A CN107176731 A CN 107176731A CN 201610133355 A CN201610133355 A CN 201610133355A CN 107176731 A CN107176731 A CN 107176731A
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- discharge opeing
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
A kind of fracturing outlet liquid processing unit and method, the device include：Hydrocyclone, for carrying out separation of solid and liquid to returning discharge opeing；Microflocculation-filtration device, reacts to form tiny flocculation body, and filter tiny flocculation body for making to return discharge opeing with flocculant；Chemical cleaning device, for carrying out returning discharge opeing plus alkali chemical reaction and precipitation separation；Microporous barrier is set in millipore filter, millipore filter, for carrying out secondary filter to returning discharge opeing；And ultraviolet generater, for killing the bacterium returned in discharge opeing, wherein, hydrocyclone, microflocculation-filtration device, chemical cleaning device, millipore filter and ultraviolet generater are sequentially connected.The fracturing outlet liquid processing unit and method, which will be returned, to be unfavorable for the material for being recycled and reused for preparing fracturing fluid and targetedly efficiently removes in discharge opeing, utility is retained to greatest extent, realizes whole recyclings of water resource and useful chemical assistant.
Description
Technical field
This disclosure relates to which the process for treating industrial waste water in oil-gas exploration and development field, more particularly to a kind of pressure break is returned
Discharge opeing processing unit and method.
Background technology
Pressure break is the necessary process before low-permeability oil gas well and the operation of shale gas well, current most widely used pressure
Split and be used as working fluid completion fracturing process for hydraulic fracturing, i.e. use water preparing fracturing fluid.After the completion of pressure break,
Oil well needs the partial open liquid that will be pressed into stratum to be discharged together with formation fluid before putting into serial production, after these pressure breaks
Return the fluid ejected referred to as fracturing outlet liquid.
Fracturing outlet liquid is noteworthy characterized by high salinity, hardness height, viscosity is high, suspended solid is more, chemistry
Medicine component is complicated, COD is high, stable system.The composition of fracturing outlet liquid is sufficiently complex, existing to prepare pressure
Split the various chemical medicaments added during liquid and proppant, including drag reducer, crosslinking agent, gel, surface-active
Agent, antisludging agent, sustained release agent, bactericide and various inorganic salts, quartz sand or artificial haydite etc., account for about 4%
Volume, stratum water, mineral oil, mineral grain, the bacterium also taken out of in stratum etc..Therefore, pressure break
It is a kind of extremely intractable industrial wastewater to return discharge opeing, the complex treatment process based on qualified discharge, cost be high,
Potential risk is big, and the disposal of reinjection into reservoir equally exists huge environmental risk and high Cost Problems.
It of particular concern is, the high-volume drilling well in scale development area, pressure break are especially big to the demand of water,
Often exceed the water resource limit in region, the restraining factors developed as shale gas.Still further aspect, pressure break
Return and contain a large amount of organic chemicals in discharge opeing, ring is all constituted to discharge environment (either earth's surface or stratum)
Border risk, is dealt carefully with to it, is disposed, and is the key that hyposmosis, shale oil gas field are successfully developed.
Be currently based on the handling process of qualified discharge purpose mainly include physico-chemical process, electrochemical method and
A small amount of biological technique method, less effective, processing cost is high and is difficult to hold, the conventional disposal means of foreign countries
It is strange land recharge dried layer (the invalid re-injection) after simple process, cost is higher, and causes water resource and return
The waste of expensive chemical assistant in discharge opeing system.Foreign countries have attempted to repeat to prepare after fracturing outlet liquid is handled
The application of fracturing fluid, achieves certain effect, but is not also very universal, and the country is substantially in this field
Conceptual phase, technology, method are also few, also immature.The complexity and pressure break of fracturing outlet liquid component
Return the uniqueness of discharge opeing property, determine its processing difficulty it is bigger, especially when be used further to after processing prepare pressure
Also need to targetedly remove when splitting liquid and be possible to influence the material of fracturing fluid property, retain utility,
Therefore it is great challenging.
Document is had both at home and abroad at present and patent is related to the treatment technology of fracturing outlet liquid.At home,
A kind of CN104310628A (denomination of invention " reuse method of water-base fracturing flowback fluid ") uses ozone oxidation,
Flocculation sediment and filtration and adsorption treatment technique, (" a kind of fracturing outlet liquid is returned denomination of invention CN104150647A
With handling process ") using degreaser oil removing, air-dissolving air-float, chemical precipitation softening, multi-medium filtering, filter core
Technology of fine filtering, CN104176881A (denomination of invention " a kind of fracturing outlet liquid qualified discharge and compounding
The handling process of fracturing fluid ") using pretreatment, except SS, two grades degraded COD, depth degradation COD, go
Ion processes；Non-patent literature《Red River oil field compression fracture returns the research of discharge opeing reuse technology》It is pre- using flocculation sediment
Processing, induced chemical positioning removal of impurities, stain eliminating technology,《The research of fracturing outlet liquid recovery and reuse technology is with answering
With》With《Boron crosslinked hydroxypropyl guar fracturing fluid recycles feasibility study》Demonstrate pressure break and return row
Match somebody with somebody the feasibility of fracturing fluid after liquid processing again, but do not introduce handling process.
In foreign literature,《Recycle of produced and flowback water in Eagle Ford Shale
Texas picks up momentum with Omni Water Solutions and Dow Water and Process
Solutions》The portable fracturing outlet liquid processing unit of the inventions such as the Dow Chemical Company is described, which employs Tao Shi
Ultrafiltration that company is most good at, reverse osmosis membrane technology, processing water disclosure satisfy that matches somebody with somebody fracturing fluid needs, the device again
Major defect be core processing unit technical sophistication, required pretreatment unit long flow path, processing cost with place
Reason standard is totally higher, is not suitable for China and directly uses；《Cost Effective Recovery of Low-TDS
Frac Flowback Water for Re-use》The method that TDS is removed using pretreatment blooming process part, place
Reason water can meet again match somebody with somebody fracturing fluid needs, its major defect be processing target be primarily directed to water intermediate ion into
Point, other processing units will also be leaned on by returning other pollutant components in discharge opeing, and its film process unit is used
Counter-infiltration (RO), is a kind of membrane technology of highest level, once investment and operating cost height, scene behaviour
Make complicated；《TREATMENT OPTIONS FOR REUSE OF FRAC FLOWBACK AND
PRODUCED WATER FROM SHALE》Describe is based on the processing target with fracturing fluid again：Always
Suspended solid (TSS), total dissolved solidss (TDS), bacterium, hardness, grease, but it does not disclose tool
The ins and outs of body.
The content of the invention
The purpose of the disclosure is in profound understanding China shale gas development zone fracturing outlet liquid property and the base constituted
On plinth, it will return and be unfavorable for the material for being recycled and reused for preparing fracturing fluid in discharge opeing and targetedly efficiently remove, most
Retain utility to limits, realize whole recyclings of water resource and useful chemical assistant, isolate
The highly concentrated rear progress harmless treatment of pollutant come, reduces processing cost, reaches resources conservation, environment
Friendly purpose.
The one side of the disclosure provides a kind of fracturing outlet liquid processing unit, including：
Hydrocyclone, for returning discharge opeing progress separation of solid and liquid to described；
Microflocculation-filtration device, for make it is described return discharge opeing and react to form tiny flocculation body with flocculant, and mistake
Filter the tiny flocculation body；
Chemical cleaning device, for carrying out returning discharge opeing plus alkali chemical reaction and the precipitation separation；
Millipore filter, microporous barrier is set in the millipore filter, for it is described return discharge opeing carry out it is secondary
Filtering；And
Ultraviolet generater, for killing the bacterium returned in discharge opeing；
Wherein, the hydrocyclone, microflocculation-filtration device, chemical cleaning device, millipore filter and
Ultraviolet generater is sequentially connected.
Preferably, it is provided with flexible fiber filtering layer in the microflocculation-filtration device
Preferably, liquid alkali is included in the chemical cleaning device.
Preferably, the microporous barrier is micron order microporous barrier.
Preferably, the hydrocyclone is connected with microflocculation-filtration device by pipeline.
Another aspect of the present disclosure provides a kind of fracturing outlet liquid processing method, at above-mentioned fracturing outlet liquid
Device is managed, this method comprises the following steps：
(1) Swirling flow sand-removing：Discharge opeing will be returned and introduce hydrocyclone, discharge opeing progress separation of solid and liquid is returned to described；
(2) microflocculation-filtration：Flocculant is added, and discharge opeing is returned described in filtering and reacts to be formed with flocculant
Tiny flocculation body；
(3) chemical cleaning：That discharge opeing is returned described in carrying out adds alkali chemical reaction and precipitation separation；
(4) micro porous filtration：By returning discharge opeing described in millipore filter secondary filter；And
(5) ultraviolet sterilization：By returning the bacterium in discharge opeing described in ultraviolet generater killing.
Preferably, liquid alkali is added in the chemical cleaning device.
Preferably, liquid caustic soda is added in the chemical cleaning device.
Preferably, the tangential direction of the discharge opeing along the hydrocyclone inwall of returning is into the Swirling flow sand-removing
Device.
The beneficial effect of the disclosure is to use Swirling flow sand-removing, microflocculation-filtration, change to fracturing outlet liquid
5 grades of processing such as scale removal, micro porous filtration and ultraviolet sterilization are learned, have been fully demonstrated precisely, efficiently, inexpensively
Feature；The fracturing outlet liquid processing unit and method of the disclosure can be in hyposmosis, shale oil and gas developments
A large amount of fracturing outlet liquids are dealt carefully with, and realize cycling utilization of wastewater；Other similar industrials are can also be used for give up
The processing of water, " zero-emission " and resource for realizing sewage is recycled to greatest extent.
Brief description of the drawings
By the way that disclosure exemplary embodiment is described in more detail with reference to accompanying drawing, the disclosure it is above-mentioned with
And other purposes, feature and advantage will be apparent, wherein, in disclosure exemplary embodiment,
Identical reference number typically represents same parts.
Fig. 1 shows the schematic diagram of the fracturing outlet liquid processing unit according to exemplary embodiment；And
Fig. 2 shows the flow chart of the fracturing outlet liquid processing method according to exemplary embodiment.
Embodiment
Preferred embodiment of the present disclosure is more fully described below with reference to accompanying drawings.Although showing this in accompanying drawing
Disclosed preferred embodiment, however, it is to be appreciated that may be realized in various forms the disclosure without should be by here
The embodiment of elaboration is limited.On the contrary, these embodiments are provided so that the disclosure is more thorough and complete,
And the scope of the present disclosure can intactly be conveyed to those skilled in the art.
Included according to the fracturing outlet liquid processing unit of exemplary embodiment：
Hydrocyclone, for carrying out separation of solid and liquid to returning discharge opeing；
Microflocculation-filtration device, reacts to form tiny flocculation body, and filter micro- for making to return discharge opeing with flocculant
Floccule body；
Chemical cleaning device, for carrying out returning discharge opeing plus alkali chemical reaction and the precipitation separation；
Microporous barrier is set in millipore filter, millipore filter, for carrying out secondary filter to returning discharge opeing；With
And
Ultraviolet generater, for killing the bacterium returned in discharge opeing；
Wherein, hydrocyclone, microflocculation-filtration device, chemical cleaning device, millipore filter and ultraviolet
Line generator is sequentially connected, and fracturing outlet liquid is handled successively.
Preferably, flexible fiber filtering layer is provided with microflocculation-filtration device, can adsorbs, cut
Stay to remove tiny flocculation body.
Preferably, liquid alkali is included in chemical cleaning device, it is further preferable that being wrapped in chemical cleaning device
Caustic soda containing liquid, to reduce residue yield.
Preferably, microporous barrier is micron order microporous barrier, to improve filter effect.
Preferably, hydrocyclone is connected with microflocculation-filtration device by pipeline, can be in pipe
The flocculant with de- steady and flocculation is added in road so that return discharge opeing mixed with flocculant, fast reaction
Tiny flocculation body is formed, then tiny flocculation body is filtered in microflocculation-filtration device again.Certainly,
Flocculant can be added in the front end of microflocculation-filtration device, then in the rear end of microflocculation-filtration device
Filtered.
As shown in Fig. 2 being comprised the following steps according to the fracturing outlet liquid processing method of exemplary embodiment：
Step 1：Swirling flow sand-removing
Carry a certain amount of mineral sand in fracturing outlet liquid, including do not play a supporting role, with liquid when add
The quartz sand or artificial haydite that enter, the subterranean minerals particle of crushing etc., in the row of returning with stronger prop-carrying capacity
Liquid, which is forced to take part down, takes stratum out of.It is exactly profit according to the first step of the fracturing outlet liquid processing method of exemplary embodiment
With the pressure and flow velocity of fracturing outlet liquid so that fracturing outlet liquid is cut along columnar cyclone separator inwall
Line direction enters cyclone separator at a high speed, separation of solid and liquid is carried out under larger centrifugal action, in cyclonic separation
Device bottom removes most sand grains.
Step 2：Microflocculation-filtration
In addition to mineral in granular form sand, there are a certain amount of suspension and a small amount of mineral oil in fracturing outlet liquid,
They constitute stable colloidal dispersion, it is necessary to add with de- steady and flocculation with electrical particulate complicated in liquid phase
The flocculant of effect, forms tiny flocculation body through of short duration mixing, reaction, then adsorbs, intercepts through filter layer
Filtering is removed.Filter layer is preferably by the soft filter layer of organic fiber.
Step 3：Chemical cleaning
Carrying out returning discharge opeing plus alkali chemical reaction and precipitation separation.Return in discharge opeing into dirty particle essentially from ground
Layer water, it has an impact to the performance for matching somebody with somebody fracturing fluid again, and stratum may also be blocked after reinjecting, therefore in chemistry
Most of calcium, magnesium are removed using the method for simplest plus alkali chemical reaction, precipitation separating scale in descaler
Ion, it is ensured that reuse effect.Liquid alkali is can select herein, and particularly liquid caustic soda is reacted with returning discharge opeing.
Step 4：Micro porous filtration (MF)
Discharge opeing is returned by millipore filter secondary filter.By above three step process, most harmful substances
Removed, but in order to further remove the mechanical admixture in aqueous phase, suspended solid, particularly foregoing scale removal
The suspended state scale forming matter by precipitating separation is had not enough time to after reaction, cheap, the practical micropore of this step is utilized
Filtering is removed in the lump, plays the effect of checking on, it is ensured that reuse water quality, while the light transmittance of water is improved, after being
Continuous ultraviolet (UV) sterilization creates good conditions.
Step 5：Ultraviolet (UV) is sterilized
The bacterium returned in discharge opeing is killed by ultraviolet generater.Contain all kinds of bacteriums in fracturing outlet liquid, it is main
If SRB, TGB are, it is necessary to kill.UV sterilizations are easy, cheap, definite effect, by preferred intensity,
Flow velocity, light transmittance disclosure satisfy that reuse requirement.
Advantage according to the fracturing outlet liquid processing unit of exemplary embodiment and method includes：
1. making full use of the high pressure, high energy advantage that stratum is accumulated after pressure break, discharge opeing will be returned and introduce Swirling flow sand-removing
In device, after liquid stream tangentially enters hydrocyclone, in liquid stream along hydrocyclone inwall rotating flow
During dynamic, point of proppant (being usually quartz sand), stratum crushing landwaste and liquid is realized using centrifugal force
From mitigation subsequent treatment burden protects subsequent processing device；
2. by adding flocculant, coagulant, destruction returns the stable colloidal dispersion of discharge opeing, controls the reaction time,
It is produced tiny flocculation body, using the absorption of the flexible filtering layer such as fibre bundle, crown_interception, realize tiny flocculation
Suspended solid and a small amount of mineral oil in filter effect, removal system, two are closed by flocculation reaction, separation of solid and liquid
For one, flexible filtering layer facilitates backwash；
3. using the hardness material added in alkali chemical reaction, intermediate processing, directly simplicity, removal system, disappear
To the potential impact of its performance during except follow-up repetition preparing fracturing fluid；
4. micro porous filtration is cheapest membrane filtration processes, play a part of filtering of checking on, will above react to be formed and
Do not separate thoroughly solid matter to filter out, it is ensured that the turbidity of follow-up ultraviolet sterilization needs, light transmittance requirement,
Ensure last to recycle effect；
5. using this most cheap, efficient process for sterilizing of ultraviolet, coordinate bactericide when matching somebody with somebody liquid again to use,
Ensure the fracturing effect of repetition preparing fracturing fluid；
6. inventor verifies repeatedly by largely putting into practice, the Pyatyi handling process of fracturing outlet liquid, technique are devised
It is easy, compact, the existing major function of oneself of each unit, moreover it is possible to take into account the demand of upstream and downstream processing unit,
Path combination is scientific and reasonable, and total residence time is short, and treatment effeciency is high, therefore one-time investment and operational management
Expense is all relatively low, can realize that environmental protection and resource reclaim are recycled simultaneously, especially fragile to environmental condition,
The area of water resources shortage, tool is of great significance.
The fracturing outlet liquid processing unit according to exemplary embodiment is described below with reference to accompanying drawing 1, the device bag
Include the hydrocyclone 1 being sequentially connected, microflocculation-filtration device 2, chemical cleaning device 3, millipore filter
4 and ultraviolet generater 5.The course of work of the device is as follows：
First, the fracturing outlet liquid from stratum is directly entered hydrocyclone 1, makes full use of the discharge opeing initial stage returned
Sufficient stratum energy, huge centrifugal force is produced during liquid stream tangentially rotational flow, will be therein
The solid particles such as unstable proppant, landwaste and liquid phase separation.
After liquid phase separation return discharge opeing liquid stream into next stage processing unit microflocculation-filtration device 2 it
Before, flocculation coagulant is added in the pipeline of connection hydrocyclone 1 and microflocculation-filtration device 2, is led to
Piping mixing makes stable colloidal dispersion de- steady, and the charged particle such as suspended solid therein, mineral oil is in wadding
Solidifying agent effect is lower to occur limited flocculation reaction formation tiny flocculation body.By in microflocculation-filtration device 2
The flexible fiber filtering layer of setting adsorbed to tiny flocculation body, is retained and is removed.
Next, returning discharge opeing into chemical cleaning settling vessel 3, liquid alkali is added in scale removal settling vessel 3, not
Liquid caustic soda (NaOH) is typically considered as to reduce residue yield, by stirring, mixing, reaction,
Make to return the structural material precipitation separation in discharge opeing.
Return discharge opeing liquid stream and subsequently enter millipore filter 4, millipore filter 4 is cut using its micron order microporous barrier
Filter is acted on, and is carried out filtering of checking on to the subparticle produced in above two-stage electrochemical reaction processing procedure, is entered
One step improves suspension, dirt, the clearance for causing absurd creature matter, improves light transmittance, optimizes follow-up ultraviolet (UV)
The working environment of sterilization, it is ensured that again with fracturing fluid property.
Finally, discharge opeing is returned into ultraviolet generater 5 by millipore filter 4, in ultraviolet generater 5
Under the ultraviolet irradiation of the appropriate intensity produced, the bacterium in killing system, the sterilization added during with matching somebody with somebody liquid again
Agent coordinates, it is ensured that bacterium is not exceeded in the fracturing fluid on injection stratum.
By above-mentioned processing, influence to match somebody with somebody the cutting grain, suspended solid, ore deposit of fluidity energy again in fracturing outlet liquid
Thing oil and hardness material, bacterium are removed substantially, and the original drag reducer manually added, crosslinking agent,
The macromolecule organic active ingredient such as gel, surfactant is retained substantially, can be saved and matched somebody with somebody again according to monitoring
Auxiliary dosage during fracturing fluid, while more than 90% water is also reused, realizes that resource and environment is double
Win.
Above-mentioned technical proposal is a kind of embodiment of the present invention, for those skilled in the art,
On the basis of principle disclosed by the invention, it is easy to make various types of improvement or deformation, and not only limit
In the description of above-mentioned specific embodiment of the invention, thus above description simply it is preferred, and and without limit
The meaning of property processed.
Claims (9)
1. a kind of fracturing outlet liquid processing unit, including：
Hydrocyclone, for returning discharge opeing progress separation of solid and liquid to described；
Microflocculation-filtration device, for make it is described return discharge opeing and react to form tiny flocculation body with flocculant, and mistake
Filter the tiny flocculation body；
Chemical cleaning device, for carrying out returning discharge opeing plus alkali chemical reaction and the precipitation separation；
Millipore filter, microporous barrier is set in the millipore filter, for it is described return discharge opeing carry out it is secondary
Filtering；And
Ultraviolet generater, for killing the bacterium returned in discharge opeing；
Wherein, the hydrocyclone, microflocculation-filtration device, chemical cleaning device, millipore filter and
Ultraviolet generater is sequentially connected.
2. fracturing outlet liquid processing unit according to claim 1, wherein the microflocculation-filtration
Flexible fiber filtering layer is provided with device.
3. fracturing outlet liquid processing unit according to claim 1, wherein being wrapped in the chemical cleaning device
Alkali containing liquid.
4. fracturing outlet liquid processing unit according to claim 1, wherein the microporous barrier is micron order
Microporous barrier.
5. fracturing outlet liquid processing unit according to claim 1, wherein the hydrocyclone with it is micro-
The direct filter that flocculates is connected by pipeline.
6. a kind of fracturing outlet liquid processing method, using the pressure break according to any one of claim 1-5
Discharge opeing processing unit is returned, is comprised the following steps：
(1) Swirling flow sand-removing：Discharge opeing will be returned and introduce hydrocyclone, discharge opeing progress separation of solid and liquid is returned to described；
(2) microflocculation-filtration：Flocculant is added, and discharge opeing is returned described in filtering and reacts to be formed with flocculant
Tiny flocculation body；
(3) chemical cleaning：That discharge opeing is returned described in carrying out adds alkali chemical reaction and precipitation separation；
(4) micro porous filtration：By returning discharge opeing described in millipore filter secondary filter；And
(5) ultraviolet sterilization：By returning the bacterium in discharge opeing described in ultraviolet generater killing.
7. fracturing outlet liquid processing method according to claim 6, wherein in the chemical cleaning device
Add liquid alkali.
8. fracturing outlet liquid processing method according to claim 7, wherein in the chemical cleaning device
Add liquid caustic soda.
9. fracturing outlet liquid processing method according to claim 6, wherein described return discharge opeing along the rotation
The tangential direction for flowing desander inwall enters the hydrocyclone.
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