CN106830438A - A kind of fracturing outlet liquid disposal facility and its disposing technique - Google Patents

Abstract

The invention discloses a kind of fracturing outlet liquid disposal facility, including fracturing outlet liquid storage pool, fracturing outlet liquid storage pool is connected with mixed catalytic oxidation unit, mixed catalytic oxidation unit is connected with flocculation unit, flocculation unit is connected with precipitation unit, precipitation unit is connected with air flotation cell, and air flotation cell is connected with secondary filter unit；Mixed catalytic oxidation unit, flocculation unit, precipitation unit, air flotation cell and secondary filter unit are respectively connected with same sewage sludge storage pond, sewage sludge storage pond is connected with plate compression unit, plate compression unit is provided with drain pipe, and drain pipe is connected with flocculation unit and air flotation cell respectively；The beneficial effects of the invention are as follows：Reasonable in design, simple structure can efficiently be disposed fracturing outlet liquid, and filtering accuracy is high, and security performance is high, and operating cost is low, can be suitable for existing oil field development technology.

Description

A kind of fracturing outlet liquid disposal facility and its disposing technique

Technical field

The invention belongs to oil field development field, and in particular to be a kind of fracturing outlet liquid disposal facility and its disposal work Skill.

Background technology

Oil as modern society one of the indispensable energy, its main source is the exploitation in oil field, an oil-containing And then construction will carry out visiting in detail and progressively input exploitation after pre-test finds that it has commercial hydrocarbon flow.So-called oil Field is developed, and is exactly according to achievement and necessary productivity development experiments are visited in detail, to industrial valency on the basis of comprehensive study The oil field of value, the requirement according to country to crude oil production, from the actual conditions and production law in oil field, is made rational Development plan is simultaneously built and is gone into operation to oil field, makes oil field by predetermined production capacity and economic effect long-term production, until The overall process of end-of-development.

And in oilfield development process, the wide variety of increasing yield and injection mode of oil-water well measure, with inevitable in treatment process Substantial amounts of measure is produced to return discharge opeing, with complicated component, physicochemical property be changeable, treatment and the features such as big transport difficulty；It is same with this When with the implementation of new two method, how efficient and rational treatment measures waste liquid, bottleneck problem as the development of puzzlement oil field it One, therefore, carry out the research of measure liquid waste disposal technique to oil field great significance.

The content of the invention

In order to solve the above technical problems, the present invention is provided, a kind of daily output is high, and security performance is high, and operating cost is small , filtering accuracy fracturing outlet liquid disposal facility and its disposing technique high.

To achieve the above object, the technical solution adopted by the present invention is that a kind of fracturing outlet liquid disposal facility, its structure will Point is, including fracturing outlet liquid storage pool, and fracturing outlet liquid storage pool is connected with mixed catalytic oxidation unit, mixed catalytic oxidation Unit is connected with flocculation unit, and flocculation unit is connected with precipitation unit, and precipitation unit is connected with air flotation cell, air flotation cell connection There is secondary filter unit；Mixed catalytic oxidation unit, flocculation unit, precipitation unit, air flotation cell and secondary filter unit connect Same sewage sludge storage pond is connected to, sewage sludge storage pond is connected with plate compression unit, and plate compression unit is provided with drain pipe, goes out Liquid pipe is connected with flocculation unit and air flotation cell respectively.

Used as preferred scheme of the invention, secondary filter unit is provided with filter and filtering material, and filtering material uses PE Sintered filter core is made, 1 μm of the porosity of filtering material；Filter uses mechanical metal filter, automatic voltage measurement, automatic on-line backwash Mode, this grade of filtering accuracy of filter is 1 μm.

Used as preferred scheme of the invention, catalytic oxidation unit is connected with immersible pump, roots blower, goes out water pump and the first medicine Agent pump, the first compound pump is two.

Used as preferred scheme of the invention, flocculation unit is connected with the water pump that goes out of catalytic oxidation unit, flocculation unit connection There are three second medicament pumps.

Used as preferred scheme of the invention, precipitation unit includes flocculation basin and sedimentation basin, and flocculation basin and sedimentation basin bottom are equal Valve is provided with, flocculation basin and sedimentation basin are connected with sludge concentration tank, and sludge concentration tank is provided with the water pump being connected with flocculation basin.

Used as preferred scheme of the invention, air flotation cell includes dissolving, and dissolving is connected with pipeline pump, air compressor machine, scrapes Plate device and clear water reserviors.

Used as preferred scheme of the invention, coarse filter device, force (forcing) pump and precise filtering device set on precise filtering device There are filtering process valve and counter-flushing process valve.

Used as preferred scheme of the invention, plate compression unit includes frame filter press, screw pump and auger conveyor, includes frame Filter press is provided with sheet frame.

Fracturing outlet liquid disposing technique of the invention is：

(1) carries out continued oxidation reaction to fracturing outlet liquid, is added by the first compound pump in entering to fracturing outlet liquid Sulfuric acid and catalyst；

(2) adds inorganic flocculating agent, organic flocculant in flocculation unit by second medicament pump, in removal water quality Larger molecular organicses, suspension, bulky grain etc., reduce effluent color dilution, turbidity；

(3) is to carry out separation of solid and liquid to the water body after flocculation；

(4) realizes the removal of liquid phase small particles using dissolved air water；

(5) holes are filtered off except the suspension in water body；

(6) carries out separation of solid and liquid disposal to mud in sludge-tank.

The beneficial effects of the invention are as follows：Reasonable in design, simple structure can efficiently be disposed fracturing outlet liquid, and And filtering accuracy is high, security performance is high, and operating cost is low, can be suitable for existing oil field development technology.

Brief description of the drawings

Fig. 1 is overall structure diagram of the invention；

Fig. 2 is catalytic oxidation unit structural representation of the invention；

Fig. 3 is flocculation unit structural representation of the invention；

Fig. 4 is precipitation unit structural representation of the invention；

Fig. 5 is air flotation cell structural representation of the invention；

Fig. 6 is secondary filter cellular construction schematic diagram of the invention；

Fig. 7 deckle board press filtration unit structural representation of the invention；

Wherein, 1- mixed catalytics oxidation unit, 2- flocculation units, 3- precipitation units, 4- air flotation cells, 5- secondary filter lists Unit, 6- sewage sludge storages pond, 7- plate compression units, 8- fracturing outlet liquid storage pools, 9- immersible pumps, 10- roots blowers, 11- goes out Water pump, the compound pumps of 12- first, 13- second medicament pumps, 14- flocculation basins, 15- sedimentation basins, 16- sludge concentration tanks, 17- water pumps, 18- dissolvings, 19- pipeline pumps, 20- air compressor machines, 21- scraper plate devices, 22- clear water reserviors, 23- coarse filter devices, 24- force (forcing) pumps, 25- Precise filtering device, 26- includes frame filter press, 27- screw pumps, 28- auger conveyors.

Specific embodiment

Explanation is further explained to the present invention below in conjunction with the accompanying drawings, but is not limited the scope of the invention.

As shown in figure 1, a kind of fracturing outlet liquid disposal facility, including fracturing outlet liquid storage pool 8, fracturing outlet liquid storage Pond is connected with mixed catalytic oxidation unit 1, and mixed catalytic oxidation unit 1 is connected with flocculation unit 2, and it is heavy that flocculation unit 2 is connected with Shallow lake unit 3, precipitation unit 3 is connected with air flotation cell 4, and air flotation cell 4 is connected with secondary filter unit 5；Mixed catalytic oxidation is single Unit 1, flocculation unit 2, precipitation unit 3, air flotation cell 4 and secondary filter unit 5 are respectively connected with same sewage sludge storage pond 6, dirty Mud storage pool 6 is connected with plate compression unit 7, and plate compression unit 7 is provided with drain pipe, drain pipe respectively with flocculation unit 2 Connected with air flotation cell 4.

As shown in fig. 6, described described secondary filter unit 5 includes coarse filter device 23, force (forcing) pump 24 and accurate mistake Filter device 25, precise filtering device 25 is provided with filtering process valve and counter-flushing process valve；Secondary filter unit 5 was provided with Filter and filtering material, filtering material are made of PE sintered filter cores, 1 μm of the porosity of filtering material；Filter is using machinery Metal filter, automatic voltage measurement, automatic on-line backwash mode, this grade of filtering accuracy of filter is 1 μm；

Operation rules

Immersible pump is opened, by clear water reserviors clear water through coarse filtration；

Coarse filtration switch is all transferred to automatic gear；

Force (forcing) pump is opened, coarse filtration water outlet enters treatment discharge bay by secondary filter；

Treat that secondary filter pressure gauge will be backwashed more than 0.4Mpa.

Points for attention

Secondary filter unit, opens filtering process valve door, closes counter-flushing process valve, starts immersible pump, you can carry out Secondary filter.Filtering tank body pressure is checked, if without water outlet output, opening force (forcing) pump, within control filtering pressure tank 0.4MPa, is surpassed It is out of service after crossing this pressure, carry out backwash operation；

Filter backwash operation closes filtering process valve to stop diving pump water inlet, opens counter-flushing process valve, opens Dynamic force (forcing) pump is backwashed, and rinses half an hour；

Note air supporting discharge bay liquid level and immersible pump position, it is ensured that liquid level is controllable, prevent immersible pump from exposing liquid Face burns out pump.

As shown in Fig. 2 described catalytic oxidation unit 1 is connected with immersible pump 9, roots blower 10, goes out water pump 11 and first Compound pump 12, the first compound pump 12 is two；Operation rules is as follows：

Open out water pump 11 to be intake in catalysis oxidation pond 1, be separately turned on the first compound pump 12-1# and 3# to catalysis oxidation Waste water carries out dosing (sulfuric acid, catalyst) in pond 1, opens the machine of Roots's wind 10 and is aerated to waste liquid in catalysis oxidation pond 1, notes Item：Roots blower 10 is continuous operation in this unit, it is ensured that the sewage in reacting tank body is stirred.Note Roots's wind The engine oil level of machine 10, supplements butter and machine oil in time, it is ensured that blower fan runs well；Sulfuric acid dosing foundation：Check reacting tank body Interior pH value of sewage water, between control 3-4, if during more than 4, the extension sour pump opening time.If during less than 3, when reducing sour pump unlatching Between.Presently suggested sour pump was opened 10 minutes every 1 hour, and concrete condition can be regulated and controled according to pH in tank body.Catalyst dosing Foundation：Catalyst chemical feeding quantity is the 0.1% of inflow, and water is smaller during debugging at present, it is impossible to which continuous turn on pump supplies medicine, builds at present View catalyst pump was opened 10 minutes every 1 hour.

As shown in figure 3, described flocculation unit 2 is connected with the water pump 11 that goes out of catalytic oxidation unit 1, flocculation unit 2 is connected There are three second medicament pumps 13；Operation rules is as follows：Open out water pump 11 and waste liquid in catalysis oxidation pond 1 is imported into flocculation basin 2, open Second medicament pump 13-7# is opened to Polyferric Sulfate is added in waste liquid, second medicament pump 13-5# is opened and is added alkali lye, open second medicament pump 13-9# adds PAM, adjusts three flows of second medicament pump 13, inorganic flocculating agent (iron/aluminium)：Chemical feeding quantity is amount of inlet water 1% (being calculated according to 15% solution) of 0.15%, i.e. wiring solution-forming amount, this part can be adjusted the second medicine according to water inlet value The pump discharge of agent 13.

Calculation：Theoretical medicament flow

Calculate medicament flow mode：Go out liquid using graduated cylinder (250ml) measurement PAC solution to accumulate, use stopwatch reading t1.

Calculation：Flow

A PAC solution flow is measured per hour, if flow is more than theoretical medicament flow, is reduced dosing pump and is entered dose.If Flow is less than theoretical medicament flow, increases dosing pump and enters dose.Specifically depending on field condition.

Alkali lye：It is adjusted the addition of alkali number according to pH value in flocculation basin, controls between 8-9, if during more than 9, adjusts Section measuring pump, reduces chemical feeding quantity.If during less than 8, adjusting measuring pump, increase chemical feeding quantity, organic flocculant (PAM)：What is configured is molten Liquid concentration is 0.1%, and chemical feeding quantity is 1%, i.e. organic flocculant dosing flow=flow of inlet water * 1%*1000 of amount of inlet water, It is another to check sedimentation basin water outlet situation, it is found that water quality is sticky, i.e. PAM chemical feeding quantities are excessive, should suitably adjust.

As shown in figure 4, described precipitation unit 3 includes flocculation basin 14 and sedimentation basin 15, flocculation basin 14 and the bottom of sedimentation basin 15 Portion is equipped with valve, and flocculation basin 14 and sedimentation basin 15 are connected with sludge concentration tank 16, and sludge concentration tank 16 is provided with and flocculation basin 14 The water pump 17 of connection；Operation rules, when flocculation basin and more sedimentation basin bottom mud amount, opens flocculation basin 14 and the bottom of sedimentation basin 15 Mud is entered sludge concentration tank 16 by portion's valve, treat in sludge concentration tank 16 mud sink to bottom open water pump 17 supernatant is imported it is heavy Shallow lake pond 15, points for attention：Water pump 17 is adjusted height in sludge concentration tank 16, extracts supernatant liquor, specific to extract quantity root Depending on field condition, backflow situation is observed, it is ensured that drawn back to water treatment system without flco, after the completion of extraction, to sloping plate deposition Pond carries out spoil disposal operation, reduces liquid level 50cm.Sedimentation basin bottom mud valve is opened, bottom is excluded and is deposited mud, discharge 30s, can According to the situation, above-mentioned two step is to work continuously, after the completion of stop 2h, it is ensured that separation of solid and liquid in sludge concentration tank.

Repeating above section carries out operation, it is ensured that sludge-tank liquid level is controllable.

As shown in figure 5, described air flotation cell 4 includes dissolving 18, dissolving 18 is connected with pipeline pump 19, air compressor machine 20th, scraper plate device 21 and clear water reserviors 22；Operation rules, opens pipeline pump, adjusts dissolving hydraulic pressure；Air compressor machine is opened, air-float water is treated There are a large amount of scum silica frost and opens scraper plate device, points for attention in face：Open operation：Opening conduits pump, punching press is carried out to dissolving, treats pressure Reach and open after 0.2-0.3Mpa air compressor machine (it is adjusted good that pipeline pumps out penstock, does not move), you can realize the output of dissolved air water.

Power-off operation：Air compressor machine is first closed, and gas will be deposited in air compressor machine is put and turn off pipeline pump only.

The addition of inorganic flocculating agent is adjusted, coutroi velocity goes out liquid condition for continuous dropping liquid.

Adjust the addition of organic flocculant, the minimum of second medicament pump.

Scrapper conveyor is operated：It is not available for continuously scraping slag operation, (current inflow is relatively low, it is necessary to be controlled for periodic running System).

As shown in fig. 7, described plate compression unit 7 includes frame filter press 26, screw pump 27 and auger conveyor 28, include 26 are provided with sheet frame on frame filter press；

Operation rules

Open plate and frame filter press and compress button；

Screw pump is opened, mud is transported to sheet frame；

Treat that pressure reaches 0.4Mpa, sheet frame is without filtrate or the muddy closing screw pump of filtrate；

Open sheet frame and loosen button；

Crawl sheet frame drives plate button.

Open auger conveyor；

Points for attention

Check filter cloth situation between sheet frame filter plate, it is impossible to filter cloth occur and there is buckling phenomena, it is ensured that without dirt in pressure-filtering process Mud flows out between sheet frame；

Open plate and frame filter press and compress button, this process subsequently to carry out pressurize operation automatically, checks pressure on pressure rod Table, black pointer can gradually rise, until pointer is maintained between green and red pointer, that is, compress operation and complete；

Open conveying worm bottom valve；

Screw pump exits and entrances valve is opened, return valve is opened, screw pump is opened, now mud can be driven into sheet frame cavity Between.Filtrate is flowed out at the tap of each filter plate, observes filtrate effect.If clarification, in this partial discharge to clear water reserviors.If muddy It is turbid, in this partial discharge to sludge-tank；

0.4MPa is arrived in pipeline pressure expression；Leading place is flowed out without filtrate or filtrate becomes cloudy；Represent that pressure-filtering process is completed, this When close screw pump, close screw pump exits and entrances valve, open return valve, close conveying worm bottom valve；

Opening pressure bar loose pressure button, now press rods can reclaim, until stop untill；

Crawl plate compression plate drives plate button, after driving plate device and snapping into filter press plate handle, is moved rearwards by filter press plate, now filters Cake can drop, if filter cake is adhered on filter cloth, it is necessary to Field Force uses instrument, be peeled off, and note not destroying filter membrane. Filter plate is opened one by one, bleeds off filter cake；

Conveying worm is opened, filter cake is delivered on loading machine bucket, now personnel need to clear up mud cake groove.

Above procedure is repeated, press filtration operation next time is completed.

A kind of fracturing outlet liquid disposal facility, its disposing technique is：(1) carries out continued oxidation reaction to fracturing outlet liquid, Sulfuric acid and catalyst are added by the first compound pump in entering to fracturing outlet liquid；

(2) adds inorganic flocculating agent, organic flocculant in flocculation unit by second medicament pump, in removal water quality Larger molecular organicses, suspension, bulky grain etc., reduce effluent color dilution, turbidity；

(3) is to carry out separation of solid and liquid to the water body after flocculation；

(4) realizes the removal of liquid phase small particles using dissolved air water；

(5) holes are filtered off except the suspension in water body；

(6) carries out separation of solid and liquid disposal to mud in sludge-tank.

Mixed catalytic oxidation technology in the present invention：

Mixed catalytic oxidation technology is belonging to a kind of novel oxidized technology of high-level oxidation technology.The technology is except possessing height The characteristics of traditional Fenton Strong oxdiatives ability being inherited outside the advantage of level oxidation, biodegradability, dissolubility to improving waste water Have very great help with coagulation tool, beneficial to the subsequent treatment of waste water.

In many metal packings, adulterate a small amount of Fe3-xNix04, Fe3-x Cox04 and Fe3-xMnx04 transition metal energy Significantly improving the activity of catalyst H2O2 decomposition, Mn and Co etc. can strengthen the catalysis activity of magnetic iron ore.Source of iron is stabilization Be present in the internal structure of catalyst, can effectively be catalyzed hydrogen peroxide during produce light base free radical 0H, The limited degree of the pH for being reacted will be reduced, and reaction also will not be along with the generation of ferric hydroxide precipitate.The technology overcomes Many weak points of traditional Fenton, strengthen the mineralization ability in neutral conditions to pollutant, have both saved medicament Dosage, reduces medicament pollution, and the environmental protection disposal of discarded object is realized in the raising of guaranteed disposal effect.

This unit Main Function is the organic substance in deep oxidation fracturing outlet liquid, efficiently reduces COD contents.

Flocculation sediment unit：

The high efficiency composition flocculant that this unit is filtered out using my company, to by the water after advanced oxidation, boron removal treatment Sample carries out bridge flocculation, and the separation again of middle oils, SS and the organic pollution of sewage is realized in the unit, unit collection pH Adjustment, coagulating, flocculation and precipitate and separate are integrated, effect of the sewage in flocculation aid and returned sludge in flocculation reaction area Under, the suspension slime layer of high concentration is formed to increase particles collision chance, effectively adsorb the pollution such as colloid, suspension, CODcr Thing, realizes SS, the cohesion of subparticle, bonding and precipitate and separate in waste water, is subsequent filter unit reduction intractability.

Secondary filter unit：

Secondary filter unit using PE sintered filter cores as filtering material, 1 μm of porosity, the filter uses mechanical metal Filter, automatic voltage measurement, automatic on-line backwash mode, this grade of filtering accuracy of filter is 1 μm, and water outlet can meet《Fracturing fluid General technical specifications requirement》SY/T6376-2008 is with liquid reuse requirement.

Plate compression unit：

Scum silica frost that the sludge and air flotation cell that inclined-plate clarifying basin is produced are produced etc. carries out muddy water point into sludge treatment system From using sludge condensation splice frame dewatering process.Sludge first passes through thickener and carries out concentration disposal, after be forced into plate and frame filter press Carry out solid-liquid separation dehydration treatment.Abjection water returns to flocculation unit or air supporting pond is processed, and the sludge collection after dehydration is at home and abroad Fortune disposal, so as to realize that sludge reduction is disposed

It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be in other specific forms realized.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit requires to be limited rather than described above, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention, and any reference in claim should not be considered as the claim involved by limitation.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined May be appreciated other embodiment.

Claims (9)

1. a kind of fracturing outlet liquid disposal facility, it is characterised in that：Including fracturing outlet liquid storage pool, fracturing outlet liquid storage pool Mixed catalytic oxidation unit is connected with, mixed catalytic oxidation unit is connected with flocculation unit, and flocculation unit is connected with precipitation unit, Precipitation unit is connected with air flotation cell, and air flotation cell is connected with secondary filter unit；Mixed catalytic oxidation unit, flocculation unit, Precipitation unit, air flotation cell and secondary filter unit are respectively connected with same sewage sludge storage pond, and sewage sludge storage pond is connected with sheet frame Press filtration unit, plate compression unit is provided with drain pipe, and drain pipe is connected with flocculation unit and air flotation cell respectively.

2. a kind of fracturing outlet liquid disposal facility according to claim 1, it is characterised in that：Described secondary filter unit Filter and filtering material are provided with, filtering material is made of PE sintered filter cores, 1 μm of the porosity of filtering material；Filter is adopted With mechanical metal filter, automatic voltage measurement, automatic on-line backwash mode, this grade of filtering accuracy of filter is 1 μm.

3. a kind of inverted discharged pressing crack liquid disposal facility according to claim 1, it is characterised in that：Described catalytic oxidation unit It is connected with immersible pump, roots blower, goes out water pump and the first compound pump, the first compound pump is two.

4. a kind of inverted discharged pressing crack liquid disposal facility according to claim 1, it is characterised in that：Described flocculation unit with urge That changes oxidation unit goes out water pump connection, and flocculation unit is connected with three second medicament pumps.

5. a kind of inverted discharged pressing crack liquid disposal facility according to claim 1, it is characterised in that：Described precipitation unit includes Flocculation basin and sedimentation basin, flocculation basin and sedimentation basin bottom are equipped with valve, and flocculation basin and sedimentation basin are connected with sludge concentration tank, dirty Mud thickener is provided with the water pump being connected with flocculation basin.

6. a kind of fracturing outlet liquid disposal facility according to claim 1, it is characterised in that：Described air flotation cell includes Dissolving, dissolving is connected with pipeline pump, air compressor machine, scraper plate device and clear water reserviors.

7. a kind of inverted discharged pressing crack liquid disposal facility according to claim 1, it is characterised in that：Described coarse filter device, Force (forcing) pump and precise filtering device, precise filtering device are provided with filtering process valve and counter-flushing process valve.

8. a kind of inverted discharged pressing crack liquid disposal facility according to claim 1, it is characterised in that：Described plate compression unit Including frame filter press, screw pump and auger conveyor, include frame filter press and be provided with sheet frame.

9. a kind of fracturing outlet liquid disposal facility according to claim 1, its disposing technique is：(1) is to fracturing outlet liquid Continued oxidation reaction is carried out, sulfuric acid and catalyst are added by the first compound pump in entering to fracturing outlet liquid；

(2) adds inorganic flocculating agent, organic flocculant in flocculation unit by second medicament pump, big point in removal water quality Sub- organic matter, suspension, bulky grain etc., reduce effluent color dilution, turbidity；

(3) is to carry out separation of solid and liquid to the water body after flocculation；

(4) realizes the removal of liquid phase small particles using dissolved air water；

(5) holes are filtered off except the suspension in water body；

(6) carries out separation of solid and liquid disposal to mud in sludge-tank.