CN103288251A - Iron-carbon micro-electrolysis processing method and device for oil field well site acid waste water - Google Patents
Iron-carbon micro-electrolysis processing method and device for oil field well site acid waste water Download PDFInfo
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- CN103288251A CN103288251A CN2013102376062A CN201310237606A CN103288251A CN 103288251 A CN103288251 A CN 103288251A CN 2013102376062 A CN2013102376062 A CN 2013102376062A CN 201310237606 A CN201310237606 A CN 201310237606A CN 103288251 A CN103288251 A CN 103288251A
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Abstract
The invention relates to an iron-carbon micro-electrolysis processing method for oil field well site acid waste water. The acid waste water to be treated is mixed with the iron powder and carbon powder so as to undergo the electrolysis reaction; hydrogen peroxide is added into the waste water after the micro-electrolysis reaction to carry out the feton oxidation; the waste water after the feton oxidation is precipitated to remove the iron powder and carbon powder, which are not completely reacted; slaked lime is placed into the precipitated waste water to carry ot the neutralization reaction; the solid-liquid separation is carried out for the waste water after the neutralization reaction, and micro suspended solids in the treated water are removed. The invention also provides a processing device. By utilizing the characteristic that the waste water is acidic, the organisms in the waste water are removed, and the pH value of the waste water is increased by adopting the iron-carbon micro-electrolysis reaction and the feton oxidation reaction, so that the consumption amount of drugs can be saved, the processed water quality is improved, the processing cost is saved, the construction of a building for processing the waste water can be avoided, and the device can be mounted on a car to move, so that the scattered well site acid waste water can be conveniently processed locally.
Description
Technical field
The present invention relates to a kind of gas field extracted waste water treatment technology and equipment, particularly iron-carbon micro-electrolysis treatment process and the equipment of well site, a kind of oil field acid waste water.
Background technology
In the Oil extraction process, in order to reach the purpose of stable yields, volume increase, need recover the hole of oil reservoir rock stratum and amplification to improve the crude oil flow conductivity, the well site frac job is the important measures that realize the rock stratum pore-forming.In order to improve the rock stratum pore-forming efficiency of frac job, a kind of general way is to carry out the Preposed acidification frac job---a large amount of acidizing fluids is injected the oil reservoir rock stratum, utilize its acid bating rock stratum, for subsequently the sand fracturing liquid of taking provides favourable condition to the rock stratum pore-forming, and finally realize the purpose of steady output of oilwell volume increase.The Preposed acidification liquid that injects the rock stratum finally returns the discharge well head, is collected in the waste liquid pool of well site.Usually, backflow waste liquid contains a large amount of hydrofluoric acid, hydrochloric acid that do not consume, and is strongly-acid (pH is less than 1), viscosity 10～30mPas, and CODCr can be up to thousands of (by petroleum-type and the contributions of other additives).Because discharge opeing internal contamination thing special (hydrofluoric acid containing) is returned in acidifying, leaving in the well site is a kind of great potential safety hazard, must in time handle.
At present, for the processing of oil field acid waste liquid, owing to do not have the condition of microorganism existence, therefore, can only adopt chemical treatment method that it is handled, the common chemical treatment process has neutralization, oxidation, coagulation-precipitation, filtration, absorption etc., and single treatment process can't effectively be removed pollutents all in the waste water, therefore, need be optimized combination to different treatment processs.Wherein, neutralization-coagulating sedimentation-oxidation is modal a kind of processing technological flow.This technology is to the acid in the waste water, suspended substance removal efficient height, and lower for the removal efficient of dissolved organic matter, the water outlet effect is relatively poor, and directly to acid waste water neutralize-during oxidation, in and the consumption of medicament and oxygenant big, the processing cost height.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, purpose of the present invention aims to provide iron-carbon micro-electrolysis treatment process and the equipment of well site, a kind of oil field acid waste water, utilize waste water to be acid feature, adopt iron-carbon micro-electrolysis reaction and Feton oxidizing reaction, the organic pH value that improves waste water simultaneously in removing waste water; Subsequently, regulate to handle the pH value of water by adding white lime (wet type adds), and add white lime and have certain flocculation and adsorption, the water quality of improving processing water is had active effect; Waste water through neutralizing treatment enters solid-liquid displacement zone, and the small suspended substance of handling in the water is removed, and further improves and handles water water quality, and finally reach emission standard.
To achieve these goals, the technical solution used in the present invention is:
The iron-carbon micro-electrolysis treatment process of well site, a kind of oil field acid waste water in turn includes the following steps:
Pending acid waste water mixed with iron powder, carbon dust carry out micro-electrolysis reaction;
Add hydrogen peroxide in the waste water behind micro-electrolysis reaction, and utilize the Fe that produces in the described micro-electrolysis reaction
2+Katalysis, carry out the Feton oxidation, to undegradable organism in the micro-electrolysis reaction proceed the degraded;
Waste water after the Feton oxidation precipitates to remove not iron powder, the carbon dust of complete reaction;
In the waste water of post precipitation, add white lime and carry out neutralization reaction;
Waste water after the neutralization reaction is carried out solid-liquid separation, the small suspended substance of handling in the water is removed.
The weight ratio of iron powder and carbon dust is 1:1 in the described micro-electrolysis reaction, dosage with 10-20g/L after the two mixes adds to pending acid waste water, be that the ratio of 5～10:1 is carried out aeration with gas-water ratio in the reaction process, aeration gas is oxygen, and hydraulic detention time is 1h.
The hydrogen peroxide dosage is 2～5g/L in the described Feton oxidizing reaction, and hydraulic detention time is 0.5h, from reacting the bottom water intaking of back waste water, carries out rear oxidation then, and the hydraulic detention time of rear oxidation is 0.5h, and the pH value rises to more than 4.
The white lime dosing method is that wet type adds in the described neutralization reaction, and until the pH value is adjusted to 8, hydraulic detention time is 0.5h.
Described solid-liquid separation utilizes the tube settling device to realize that hydraulic detention time is 1h.
The present invention provides the iron-carbon micro-electrolysis treatment facility of well site, a kind of oil field acid waste water simultaneously, comprise the oxidation reactor 2 that connects the waste water pipeline, described oxidation reactor 2 is divided into iron carbon reaction zone, Feton oxidation zone and post oxidation zone three parts, three part bottoms all arrange the aerating apparatus that is communicated with by aerating pipelines 12 with gas blower 11, iron carbon reaction zone top communicates with the Feton oxidation zone, Feton oxidation zone bottom communicates with post oxidation zone, iron carbon dust throwing device 4 inserts iron carbon reaction zone, hydrogen peroxide throwing device 3 inserts the Feton oxidation zone, the middle part of described post oxidation zone is communicated with iron carbon dust disengaging zone 5,5 bottoms, iron carbon dust disengaging zone are tapered bottom, the bottom of tapered bottom by downward-sloping passage tieback to post oxidation zone, 5 tops, iron carbon dust disengaging zone with have whipping device 7 in and flocculation reaction district 6 be communicated with, in and the bottom in flocculation reaction district 6 be communicated with solid-liquid displacement zone 8, solid-liquid displacement zone 8 middle parts arrange tube settling device 9, there is effluent weir 10 tube settling device 9 tops, white lime throwing device 13 by add pipeline 14 be connected in and flocculation reaction district 6.
Inclined tube length in the described tube settling device 9 is 1m, and the inclination angle is 60 °.
Be provided with under meter 1 in the described waste water pipeline, the data output end connected control system of under meter 1, Controlling System is according to the data on flows that receives, export three the tunnel and control signal to iron carbon dust throwing device 4, hydrogen peroxide throwing device 3 and white lime throwing device 13, realize the automatic control to dosage.
Advantage of the present invention is:
(1) the present invention utilizes well site, oil field acid waste water pH less than 1 characteristic, uses iron-carbon micro-electrolysis and is reflected at the pH value that has improved waste water when removing organic pollutant, with the consumption of medicament, has reduced processing cost in having saved.
(2) the present invention utilizes iron-carbon micro-electrolysis to be reflected at a large amount of Fe that produce in the waste water
2+, carry out the Feton oxidation by in waste water, adding hydrogen peroxide, effectively utilized Fe
2+Katalysis, reduced handle medicament and add in, obtained good treatment effect.
(3) the present invention utilizes aerating system to blast the air for the treatment of system with Fe
2+Be oxidized to Fe
3+, when regulating wastewater pH, realize coagulation, improved water quality treatment, saved processing cost.
(4) the present invention adopts modularized equipment, need not to handle the construction of structures, and equipment can vehicle-mounted movement, is convenient to distributed well site acid waste water is handled on the spot.
Description of drawings
Fig. 1 is device structure synoptic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further details.
As shown in Figure 1, the iron-carbon micro-electrolysis treatment facility of well site, a kind of oil field of the present invention acid waste water, comprise the oxidation reactor 2 that connects the waste water pipeline, described oxidation reactor 2 is divided into iron carbon reaction zone, Feton oxidation zone and post oxidation zone three parts, three part bottoms all arrange the aerating apparatus that is communicated with by aerating pipelines 12 with gas blower 11, iron carbon reaction zone top communicates with the Feton oxidation zone, Feton oxidation zone bottom communicates with post oxidation zone, iron carbon dust throwing device 4 inserts iron carbon reaction zone, hydrogen peroxide throwing device 3 inserts the Feton oxidation zone, the middle part of described post oxidation zone is communicated with iron carbon dust disengaging zone 5,5 bottoms, iron carbon dust disengaging zone are tapered bottom, the bottom of tapered bottom by downward-sloping passage tieback to post oxidation zone, 5 tops, iron carbon dust disengaging zone with have whipping device 7 in and flocculation reaction district 6 be communicated with, in and the bottom in flocculation reaction district 6 be communicated with solid-liquid displacement zone 8, solid-liquid displacement zone 8 middle parts arrange tube settling device 9, there is effluent weir 10 tube settling device 9 tops, white lime throwing device 13 by add pipeline 14 be connected in and flocculation reaction district 6.
For realizing automatization control, be provided with under meter 1 in the described waste water pipeline, the data output end connected control system of under meter 1, Controlling System is according to the data on flows that receives, export three the tunnel and control signal to iron carbon dust throwing device 4, hydrogen peroxide throwing device 3 and white lime throwing device 13, realize the automatic control to dosage.
Treatment process of the present invention is as follows successively:
Acid waste water is injected oxidation reactor 2 by the waste water pipeline, at first enter iron carbon reaction zone.Iron powder and carbon dust that weight ratio 1:1 is arranged in the iron carbon dust throwing device 4, the data on flows measured according under meter 1, the dosage input iron carbon reaction zone acid waste water ingress of 10-20g/L is pressed iron powder and carbon dust by iron carbon dust throwing device 4 in Controlling System control, fully mix, react, the effect of this bottom, district aerating apparatus provides waterpower and mixes stirring and oxygen, and gas-water ratio is 5～10:1; After acid waste water carries out micro-electrolysis reaction through iron carbon reaction zone, can remove in the water 60～80% organic pollutant, this process also is accompanied by a large amount of Fe
2+Dissolve in waste water, the pH value of waste water can be increased to 3～4 simultaneously.The hydraulic detention time in this district is 1h.
The waste water of process iron-carbon micro-electrolysis reaction enters the Feton oxidation zone by the top gravity flow of iron carbon reaction zone, the data on flows measured according under meter 1, Controlling System control adds hydrogen peroxide by hydrogen peroxide throwing device 3 dosage with 2～5g/L in the waste water, utilizes the lot of F e that forms in the reaction of the first step iron-carbon micro-electrolysis
2+Katalysis, undegradable organism in the iron-carbon micro-electrolysis reaction is proceeded degraded, after the Feton oxidation, the COD of waste water
CrClearance can reach 80～90%, in the Feton oxidation zone, the pH of waste water remains unchanged substantially.The hydraulic detention time in this district is 0.5h.
Enter post oxidation zone through the waste water after the Feton oxidation by Feton oxidation zone bottom, in post oxidation zone, the hydrogen peroxide of Xiao Haoing, iron carbon dust are not proceeded reaction, and organism is further degraded, COD
CrClearance can improve about 5%; PH increases, and can be stabilized in more than 4; Simultaneously, under the effect of bottom aeration aerating, be conducive to Fe in the water
2+Be oxidized to Fe
3+, in follow-up neutralization reaction, form Fe (OH)
3Flco further improves and handles water water quality.The hydraulic detention time in this district is 0.5h.
Handle the flow-out hole of water through the post oxidation zone middle part and flow into iron carbon dust disengaging zone 5, the iron carbon dust of complete reaction does not precipitate herein, and the return port by iron carbon dust disengaging zone 5 conical lower portion passes back into post oxidation zone and continues to participate in reaction, handle water from the posticum on 5 tops, iron carbon dust disengaging zone flows into and flocculation reaction district 6, waste water is carried out pH regulator.
In and flocculation reaction district 6, the data on flows measured according under meter 1, Controlling System control is carried out wet type in the water and is added white lime [Ca (OH) to handling by white lime throwing device 13
2], by whipping device 7 medicament that drops into is mixed with handling water, the pH value of handling water is adjusted to about 8; In the pH regulator process, be accompanied by lot of F e (OH)
3The formation of flco, this flco can be brought into play certain coagulation, can further remove pollutents such as water-borne glue body, fine suspension, in and the hydraulic detention time in flocculation reaction district 6 be 0.5h.
Subsequently, handle water from and 6 bottoms, flocculation reaction district enter solid-liquid displacement zone 8, in and the Fe (OH) of formation in the flocculation reaction district 6
3Flco, and the excessive Ca that adds (OH)
2Carry out precipitate and separate, utilize tube settling to improve deposition efficiency according to " shallow pool theory ", guarantee to handle water and can reach national secondary discharge standard, the hydraulic detention time of solid-liquid displacement zone 8 is 1h, inclined tube length in the used tube settling device 9 is 1m, and the inclination angle is 60 °.Processing water through precipitation is collected the discharge system through the water collecting dike 10 on solid-liquid displacement zone 8 tops.
Claims (8)
1. the iron-carbon micro-electrolysis treatment process of well site, oil field acid waste water is characterized in that, in turn includes the following steps:
Pending acid waste water mixed with iron powder, carbon dust carry out micro-electrolysis reaction;
Add hydrogen peroxide in the waste water behind micro-electrolysis reaction, and utilize the Fe that produces in the described micro-electrolysis reaction
2+Katalysis, carry out the Feton oxidation, to undegradable organism in the micro-electrolysis reaction proceed the degraded;
Waste water after the Feton oxidation precipitates to remove not iron powder, the carbon dust of complete reaction;
In the waste water of post precipitation, add white lime and carry out neutralization reaction;
Waste water after the neutralization reaction is carried out solid-liquid separation, the small suspended substance of handling in the water is removed.
2. the iron-carbon micro-electrolysis treatment process of well site, oil field according to claim 1 acid waste water, it is characterized in that, the weight ratio of iron powder and carbon dust is 1:1 in the described micro-electrolysis reaction, dosage with 10-20g/L after the two mixes adds to pending acid waste water, be that the ratio of 5～10:1 is carried out aeration with gas-water ratio in the reaction process, aeration gas is air, and hydraulic detention time is 1h.
3. the iron-carbon micro-electrolysis treatment process of well site, oil field according to claim 1 acid waste water, it is characterized in that, the hydrogen peroxide dosage is 2～5g/L in the described Feton oxidizing reaction, hydraulic detention time is 0.5h, then from reacting the bottom water intaking of back waste water, carry out rear oxidation, the hydraulic detention time of rear oxidation is 0.5h, and the pH value rises to more than 4.
4. the iron-carbon micro-electrolysis treatment process of well site, oil field according to claim 1 acid waste water is characterized in that, the white lime dosing method is that wet type adds in the described neutralization reaction, and until the pH value is adjusted to 8, hydraulic detention time is 0.5h.
5. the iron-carbon micro-electrolysis treatment process of well site, oil field according to claim 1 acid waste water is characterized in that, described solid-liquid separation utilizes the tube settling device to realize that hydraulic detention time is 1h.
6. the iron-carbon micro-electrolysis treatment facility of well site, oil field acid waste water, comprise the oxidation reactor (2) that connects the waste water pipeline, it is characterized in that, described oxidation reactor (2) is divided into iron carbon reaction zone, Feton oxidation zone and post oxidation zone three parts, three part bottoms all arrange the aerating apparatus that is communicated with by aerating pipelines (12) with gas blower (11), iron carbon reaction zone top communicates with the Feton oxidation zone, Feton oxidation zone bottom communicates with post oxidation zone, iron carbon dust throwing device (4) inserts iron carbon reaction zone, hydrogen peroxide throwing device (3) inserts the Feton oxidation zone, the middle part of described post oxidation zone is communicated with iron carbon dust disengaging zone (5), bottom, iron carbon dust disengaging zone (5) is tapered bottom, the bottom of tapered bottom by downward-sloping passage tieback to post oxidation zone, top, iron carbon dust disengaging zone (5) with have whipping device (7) in and flocculation reaction district (6) be communicated with, in and the bottom in flocculation reaction district (6) be communicated with solid-liquid displacement zone (8), solid-liquid displacement zone (8) middle part arranges tube settling device (9), there is effluent weir (10) tube settling device (9) top, white lime throwing device (13) by add pipeline (14) be connected in and flocculation reaction district (6).
7. according to the described treatment facility of claim 6, it is characterized in that the inclined tube length in the described tube settling device (9) is 1m, the inclination angle is 60 °.
8. according to the described treatment facility of claim 6, it is characterized in that, be provided with under meter (1) in the described waste water pipeline, the data output end connected control system of under meter (1), Controlling System is according to the data on flows that receives, export three the tunnel and control signal to iron carbon dust throwing device (4), hydrogen peroxide throwing device (3) and white lime throwing device (13), realize the automatic control to dosage.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553185A (en) * | 2013-11-01 | 2014-02-05 | 广东灵捷制造化工有限公司 | Micro-electrolytic treatment method for performing in-situ treatment on water |
| CN105293790A (en) * | 2015-12-01 | 2016-02-03 | 安洁士环保（上海）股份有限公司 | Comprehensive treatment method for oily sewage in oil field |
| CN105347580A (en) * | 2015-11-10 | 2016-02-24 | 中国石油天然气股份有限公司 | Method suitable for polymer flooding produced water processing standard-meeting discharging |
| CN107151043A (en) * | 2017-07-09 | 2017-09-12 | 北京航天环境工程有限公司 | Iron carbon microvovtex flocculation plant and Waste Water Treatment |
| CN109209268A (en) * | 2018-10-19 | 2019-01-15 | 中国石油集团渤海钻探工程有限公司 | The method that drain is returned in acidification is handled using reproducibility iron powder |
| CN109502838A (en) * | 2017-09-15 | 2019-03-22 | 南京美克斯精密机械有限公司 | A kind of processing method of intermetallic composite coating organic wastewater |
| CN110054339A (en) * | 2019-05-17 | 2019-07-26 | 廊坊新奥龙河环保科技有限公司 | Integrated sealed formula high-concentration acidic wastewater danger waste liquor treatment equipment and processing method |
| CN110844977A (en) * | 2019-11-07 | 2020-02-28 | 中国石油天然气股份有限公司 | Treatment agent for reducing COD (chemical oxygen demand) of acidified flowback fluid and using method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553185A (en) * | 2013-11-01 | 2014-02-05 | 广东灵捷制造化工有限公司 | Micro-electrolytic treatment method for performing in-situ treatment on water |
| CN105347580A (en) * | 2015-11-10 | 2016-02-24 | 中国石油天然气股份有限公司 | Method suitable for polymer flooding produced water processing standard-meeting discharging |
| CN105347580B (en) * | 2015-11-10 | 2018-06-01 | 中国石油天然气股份有限公司 | A kind of method of suitable polymer flooding water processing standard discharge |
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| CN107151043A (en) * | 2017-07-09 | 2017-09-12 | 北京航天环境工程有限公司 | Iron carbon microvovtex flocculation plant and Waste Water Treatment |
| CN109502838A (en) * | 2017-09-15 | 2019-03-22 | 南京美克斯精密机械有限公司 | A kind of processing method of intermetallic composite coating organic wastewater |
| CN109209268A (en) * | 2018-10-19 | 2019-01-15 | 中国石油集团渤海钻探工程有限公司 | The method that drain is returned in acidification is handled using reproducibility iron powder |
| CN110054339A (en) * | 2019-05-17 | 2019-07-26 | 廊坊新奥龙河环保科技有限公司 | Integrated sealed formula high-concentration acidic wastewater danger waste liquor treatment equipment and processing method |
| CN110844977A (en) * | 2019-11-07 | 2020-02-28 | 中国石油天然气股份有限公司 | Treatment agent for reducing COD (chemical oxygen demand) of acidified flowback fluid and using method |
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Application publication date: 20130911 |