CN204022596U - A kind of oil-gas field fracturing waste liquor effective, harmless treatment unit - Google Patents

A kind of oil-gas field fracturing waste liquor effective, harmless treatment unit Download PDF

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CN204022596U
CN204022596U CN201420373452.XU CN201420373452U CN204022596U CN 204022596 U CN204022596 U CN 204022596U CN 201420373452 U CN201420373452 U CN 201420373452U CN 204022596 U CN204022596 U CN 204022596U
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flotation
air
oil
gas
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王宝辉
汪怀远
罗明检
吴红军
刘先军
韩洪晶
孙晓雷
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王宝辉
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Abstract

The utility model provides a kind of oil-gas field fracturing waste liquor treatment system, and it comprises pretreatment system, flash trapping stage system, the second-order separation system and filtering system; Described pretreatment system comprises a Cyclonic reactor; Described flash trapping stage system comprises a dissolved air flotation device; Described the second-order separation system comprises a cyclone air-flotation device; Described filtering system comprises a running sand filtration device; In sequential series between described each system.Treatment system of the present utility model has flexibly easily amplification, treatment capacity is large, cost is low, simple operation and other advantages, can be used for oil-gas field fracturing waste liquor efficiently to process, the emission standard being discharged into sewage work can be reached after making liquid waste disposal, reduce the pressure of subsequent disposal.

Description

A kind of oil-gas field fracturing waste liquor effective, harmless treatment unit
Technical field
The utility model relates to a kind of waste liquid of efficient process oil-gas field fracturing process generation and makes it reach the device of emission standard.
Background technology
Fracturing technology is important measures of well production increment, generally adopts in each oil field.It utilizes ground high-pressure pump group that mucus is injected stratum with the discharge capacity substantially exceeding formation absorption ability, in formation crack, stratum, improves the flow conductivity of hydrocarbon zone, thus reach volume increase object.Frac job produces a large amount of fracturing waste liquors and must discharge, and it forms complexity, main containing melon glue, formaldehyde, petroleum-type and other various additive, has the large and COD high of high concentrtion, viscosity.Environment protection standard intractability is very large, is the waste water that in oilfield sewage, intractability is maximum.If return the fracturing liquid draining into ground to arrange outward without process, will to surrounding environment, especially farm crop and surface drainage system cause severe contamination.
At present, along with the carrying out of oil-field development, fracture job amount increases year by year, and the injury of pressure break formation really exists.Fracturing liquid enters stratum, and cause clay water-swelling, disperse migration to cause permeability plugging, also cause the heavy ingredient of crude oil to be separated out, blocking formation pore, stratum filtration ability declines, and fracturing fluid recovery (backflow) thoroughly can severe contamination oil reservoir yet.And along with the increase of pressure break number of times, of the fracturing fluid filter loss increases, make seam and shorten, fracture flow capacity reduces, newly-increased production declining.It is estimated, national oil field needs the oil well of frac job to be about 30,000 mouthfuls every year, and generally after every mouthful of well pressure break, discharge opeing at least produces thickness waste liquid 300m 2, in prediction on such basis, annual pending fracturing waste liquor is up to 900 ten thousand steres.If these fracturing waste liquors do not take effective treatment measures, irremediable injury will certainly be caused to environment.
Domesticly chemical method, biochemical process, solidification method is mainly adopted to process for fracturing waste liquor.The drawback that traditional treatment process has it certain, as higher in solidification method existence solidification cost, the shortcomings such as complicated operation, the incinerating method in chemical method can cause secondary pollution.In recent years, carry out the large-scale research for fracturing fluid treatment both at home and abroad, most adopt the methods such as physics, biology, photochemical catalysis, chemistry and physical adsorption, ultrasonic wave, electrochemistry, but these methods remain in actual applications costly, many, the deficiency such as processing unit is immature, processing efficiency is low consuming time.
Utility model content
For the problem that conventional process fracturing waste liquor runs into, the purpose of this utility model is: provide a kind for the treatment of effect good and the reactive system of easy handling control, for in actual production time, cost, reaction efficiency be high, waste water after process easily reaches II grade of emission standard in GB8978-1996.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
There is provided a kind of oil-gas field fracturing waste liquor treatment system, it comprises pretreatment system, flash trapping stage system, the second-order separation system and filtering system; Described pretreatment system at least comprises a Cyclonic reactor; Described flash trapping stage system at least comprises a dissolved air flotation device; Described the second-order separation system at least comprises a cyclone air-flotation device; Described filtering system at least comprises a running sand filtration device; In sequential series between described each system.
In the preferred scheme of the utility model, described oil-gas field fracturing waste liquor treatment system also comprises the surge tank be between described the second-order separation system and described filtering system.
The utility model is further in preferred scheme, and described pretreatment system is by lift pump, Cyclonic reactor and pre-treatment tank is in sequential series forms; Described pre-treatment tank connects dissolved air flotation device, and dissolved air flotation device connects cyclone air-flotation device, and cyclone air-flotation device is connected with running sand filtration device with lift pump through surge tank; External one of described dissolved air flotation device receives fuel tank; The external slag recovering box of described cyclone air-flotation device; Described running sand filtration device connects a filtered water tank and wet-pit.
Dissolved air flotation device described in the utility model preferred HDAF high-efficiency dissolued-air air-floating apparatus.This air-floating apparatus has the following advantages: system adopts integrated array mode, and level of automation is high, effectively reduces space requirement, and take up an area little, energy consumption is low, and installation and transportation are convenient.
Cyclone air-flotation device described in the utility model preferred GQF high energy air flotation processing device.This air-floating apparatus has the following advantages: (1) low pressure operation, and molten gas efficiency is up to 99%, and release rate is up to 99%.(2) efficient adsorption of microbubble and suspended particle, improves the removal effect of suspended particle.(3) dissolved air water dissolved efficiency is higher than traditional air-floating apparatus 3 times.(4) easily realize automatically controlling, easy care easy to operate, noise are low.(5) grease, jelly and the fibre suspension in sewage can be removed, reduce the blowdown loads such as BOD, COD, SS, obviously can improve the color of water quality simultaneously.
Running sand filtration device described in the utility model preferred JBO-ZQX/10 self-stip (quicksand) filtration unit.The operation of this filtration unit can be divided into waste water filtering and the relatively independent process of simultaneously carrying out again of filtrate cleaning and regeneration two.There is simplification water treatment technological process, floor space is little, structure is simple, the advantages such as flexible and convenient operation are installed, and reduce energy consumption and the labor management expense of waste water treatment process too many levels, alleviate operation easier.
Liquid waste treatment system working process described in the utility model is as follows:
First waste liquid is risen in Cyclonic reactor by lift pump and carries out pre-treatment, can add oxygenant with efficiently broken glue, breakdown of emulsion and decon in pretreatment reaction; Pretreated waste water enters pre-treatment tank; After the waste water that pre-treatment tank is discharged enters the dissolved air flotation device in described flash trapping stage system, by coming the situation not dosing of liquid oil-containing or a small amount of dosing, by most of crude separation out, the sump oil that dissolved air flotation device produces is discharged in described receipts fuel tank, and the mud that sedimentation produces directly is discharged to pond by dissolved air flotation device sewage draining exit; The waste water that dissolved air flotation device is discharged enters in cyclone air-flotation device, adds flocculation agent and coagulant aids as required, is separated the scum silica frost produced and is discharged in described slag recovering box; Obtain through oil removing, except the waste water hanging thing; The waste water that cyclone air-flotation device is discharged is pumped into running sand filtration device after surge tank, and the waste water after filtration can enter in filtered water tank, and the mud filtered out directly enters pond.
Compared with prior art, the utility model provides the reactive system that the good and easy handling of a kind for the treatment of effect controls, when this system is used in actual production, there is easily amplification flexibly, treatment capacity is large, cost is low, reaction efficiency is high, simple operation and other advantages, can be used for oil-gas field fracturing waste liquor efficiently to process, waste water after process easily reaches II grade of emission standard in GB8978-1996, reduces the pressure of subsequent disposal.
Accompanying drawing explanation
Fig. 1 is oil-gas field fracturing waste liquor treatment system composition schematic diagram in the utility model embodiment 1.
In figure, mark is described as follows:
1. lift pump; 2. Cyclonic reactor; 3. pre-treatment tank; 4.HDAF high-efficiency dissolued-air air-floating apparatus; 5. receive fuel tank; 6. sewage draining exit; 7.GQF high energy air flotation processing device; 8. slag recovering box; 9. surge tank; 10.JBO-ZQX/10 self-stip (quicksand) filtration unit; 11. filtered water tanks; 12. wet-pits.
Embodiment
Below describe embodiment of the present utility model, as no specific instructions, institute's with medicament all can be obtained by commercial sources.
Below describe the working method of embodiment of the present utility model, all can be grasped by those of ordinary skill and implement.
Embodiment 1
Referring to Fig. 1, treatment unit of the present utility model, it comprises pretreatment system, flash trapping stage system, the second-order separation system and filtering system; Described pretreatment system is composed in series by lift pump 1, Cyclonic reactor 2 and pre-treatment tank 3; Described flash trapping stage system is made up of an external receipts fuel tank 5 of dissolved air flotation device 4; Described the second-order separation system is made up of an external slag recovering box 8 of cyclone air-flotation device 7; Surge tank 9 is provided with between described the second-order separation system and described filtering system; Described filtering system connects filtered water tank 11 by a running sand filtration device 10 and wet-pit 12 forms; Described pre-treatment tank 3 connects dissolved air flotation device 4, and dissolved air flotation device 4 connects cyclone air-flotation device 7, and cyclone air-flotation device 7 is connected with running sand filtration device 10 with lift pump 1 through surge tank 9.
When the treatment unit of the present embodiment is applied to oil field compression fracture waste liquid, the sewage entered by waste liquid storage pool, is first promoted in whirlwind-type reactor 2, by agent-feeding treatment strengthening effect by lift pump 1.Pretreated waste water enters in pre-treatment tank 3, then enters primary separator 4 from pre-treatment tank 3, and the outside of primary separator connects receives fuel tank 5.Coagulation device adopts HDAF high-efficiency dissolued-air air-floating apparatus, can reduce the oleaginousness in waste water efficiently, and the grease of removal is disposed to be received in fuel tank 5, and the mud of separation enters waste liquid storage pool by sewage draining exit 6.Through the process of deoiling of coagulation device, waste water enters secondary processor 7.Secondary processor adopts GQF high energy cyclone air-flotation treatment unit, major function removes suspended matter in waste water and remaining grease, being separated the scum silica frost produced is discharged in the slag recovering box 8 connecting secondary processor, through the process of two stages for the treatment of device, grease now in waste water and suspended substance greatly reduce, and waste water enters surge tank 9.In order to remove oleaginousness and the suspended substance of waste water further, this device adds JBO-ZQX/10 self-stip (quicksand) filtration unit 10, waste water in surge tank 9 pumps into JBO-ZQX/10 self-stip (quicksand) filtration unit through lift pump 1, waste liquid through filtering further is discharged in filtered water tank 11, then discharges treatment unit by wet-pit 12.
Below by example, effect of the present utility model is described further:
Fracturing liquid is transported to treatment station by tank car, after simple precipitation, degraded, oil skimming process, the waste liquid parameter entering the utility model device is: carry out liquid suspended substance 180-2200mg/L, oil-contg 395-5140mg/L, according to grade emission standard of II in GB8978-1996, the emission standard of suspended substance (ss) is lower than 30mg/L, and the emission standard of petroleum-type is lower than 150mg/L.Therefore, undressed fracturing waste liquor is far from reaching this standard, and this fracturing waste liquor of device process of current series utility model embodiment 1, controls reaction conditions by regulating agent dosage, after measuring the effluent quality of differential responses condition, experimental result is as shown in table 1 below:
Table 1
The condition of sequence number 1 is that oxidant pump opens 30%, and flocculation agent pump opens 30%, and coagulant aids pump opens 15%.
The condition of sequence number 2 is that 2h flocculation agent pump opens 70%, and coagulant aids pump opens 45%.
The condition of sequence number 3 is that 3h oxidant pump opens 50%.4h flocculation agent pump opens 30%, and coagulant aids pump opens 30%.
The condition of sequence number 4 is that oxidant pump opens 50%, and flocculation agent pump opens 70%, and coagulant aids pump opens 15%.
The condition of sequence number 5 is that 6h oxidant pump opens 70%, and flocculation agent pump opens 70%, and coagulant aids pump opens 15%.
The condition of sequence number 6 is that 4h flocculation agent pump opens 50%, and coagulant aids pump opens 15%.
The condition of sequence number 7 is that 6h flocculation agent pump opens 70%, and coagulant aids pump opens 30%.
Wherein, oxidant concentration is 5%, compound pump full range 315L/h.Flocculant concentration is 5%, compound pump full range 170L/h.The concentration 800mg/L of coagulant aids, compound pump full range 170L/h or 120L/h.
As above table can be found out, the utility model apparatus system efficiently can remove organism, oil and suspended substance in fracturing waste liquor, effluent quality under any condition, its oleaginousness and SS content are all lower than grade emission standard of II in GB8978-1996, therefore, the utility model has very strong superiority in process this field of oil-gas field fracturing waste liquor.

Claims (6)

1. an oil-gas field fracturing waste liquor treatment system, is characterized in that: it comprises pretreatment system, flash trapping stage system, the second-order separation system and filtering system; Described pretreatment system at least comprises a Cyclonic reactor; Described flash trapping stage system at least comprises a dissolved air flotation device; Described the second-order separation system at least comprises a cyclone air-flotation device; Described filtering system at least comprises a running sand filtration device; In sequential series between described each system.
2. treatment system according to claim 1, is characterized in that: described oil-gas field fracturing waste liquor treatment system also comprises the surge tank be between described the second-order separation system and described filtering system.
3. treatment system according to claim 2, is characterized in that: described pretreatment system is by lift pump, Cyclonic reactor and pre-treatment tank is in sequential series forms; Described pre-treatment tank connects dissolved air flotation device, and dissolved air flotation device connects cyclone air-flotation device, and cyclone air-flotation device is connected with running sand filtration device with lift pump through surge tank; External one of described dissolved air flotation device receives fuel tank; The external slag recovering box of described cyclone air-flotation device; Described running sand filtration device connects a filtered water tank and wet-pit.
4. a kind for the treatment of system according to claim 1 or 3, is characterized in that: described dissolved air flotation device is HDAF high-efficiency dissolued-air air-floating apparatus.
5. a kind for the treatment of system according to claim 1 or 3, is characterized in that: described cyclone air-flotation device is GQF high energy air flotation processing device.
6. a kind for the treatment of system according to claim 1 or 3, is characterized in that: described running sand filtration device is JBO-ZQX/10 self-stip running sand filtration device.
CN201420373452.XU 2014-07-08 2014-07-08 A kind of oil-gas field fracturing waste liquor effective, harmless treatment unit Active CN204022596U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104086026A (en) * 2014-07-08 2014-10-08 王宝辉 Efficient innocent treatment device and efficient innocent treatment method for oil-gas field fracturing wastewater
CN105314796A (en) * 2015-11-16 2016-02-10 克拉玛依市弘峰科技有限公司 Oil field high-salinity and oil-bearing wastewater treatment technology
CN105461112A (en) * 2015-12-16 2016-04-06 中国石油天然气集团公司 Fracturing flow-back fluid treatment device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104086026A (en) * 2014-07-08 2014-10-08 王宝辉 Efficient innocent treatment device and efficient innocent treatment method for oil-gas field fracturing wastewater
CN105314796A (en) * 2015-11-16 2016-02-10 克拉玛依市弘峰科技有限公司 Oil field high-salinity and oil-bearing wastewater treatment technology
CN105461112A (en) * 2015-12-16 2016-04-06 中国石油天然气集团公司 Fracturing flow-back fluid treatment device

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