CN101190822A - Technique for treating sewage of high well and deep drilling well - Google Patents

Technique for treating sewage of high well and deep drilling well Download PDF

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Publication number
CN101190822A
CN101190822A CNA2006101440521A CN200610144052A CN101190822A CN 101190822 A CN101190822 A CN 101190822A CN A2006101440521 A CNA2006101440521 A CN A2006101440521A CN 200610144052 A CN200610144052 A CN 200610144052A CN 101190822 A CN101190822 A CN 101190822A
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China
Prior art keywords
well
sewage
solid
treatment
liquid separation
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CNA2006101440521A
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Chinese (zh)
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CN101190822B (en
Inventor
杨敏
高迎新
丁然
安伟
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中国科学院生态环境研究中心
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Publication of CN101190822A publication Critical patent/CN101190822A/en
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Abstract

The invention relates to a treating technique used in sewage of high well and deep bore well, which employs the treating technique that focuses on coagulating sedimentation, first stage oxidation, biological treatment and second stage oxidation and assisted by the deep treating technique of solid-liquid separation, acid-base adjustment and second stage oxidation. After going through the treatment with the treating technique provided by the invention for the sewage of high well and deep bore well, the well water can reach national sewage discharge standard (GB8378-1996). The treating technique provided by the invention can not only reduce the influence of waste discharge on environment, but also save operation cost.

Description

A kind of treatment process that is used for sewage of high well and deep drilling well
Technical field
The invention belongs to field of waste water treatment, specifically relate to a kind of treatment process that is used for sewage of high well and deep drilling well.
Background technology
There is large amount of sewage to produce in the oilfield drilling process, promptly is commonly called as drilling waste water.Usually must excavate a drilling waste water at situ of drilling well and cheat and store this part waste water, this may cause soil, the face of land and groundwater pollution, even is detrimental to health.Therefore, after drilling operation is finished, must carry out harmless treatment to them.
Domestic drilling waste water treatment process commonly used has: direct exhaust method, injection safe formation, backfill method, solidification method, method of chemical treatment, soil cultivating method, recycling method and chemical oxidization method, yet owing to kind, the well depth relevant substantial connection of drilling waste water water quality with the drilling well additive, particularly the oil and water well of well depth is owing to the additive component complexity more than 2000 meters, and its water quality is generally as shown in table 1.For this class sewage, in order to reach the requirement of state sewage emission standard (GB8378-1996), make CODcr<150mg/l, petroleum-type<10mg/l, conventional coagulation, Fenton (hydrogen peroxide and ferrous mixed solution), ozone oxidation and biochemical processing method etc. all can't effectively be handled.
The water quality of table 1, sewage of high well and deep drilling well
Wherein, COD: chemical oxygen demand (COD)
BOD: biochemical oxygen demand (BOD)
TDS: soluble solid
Summary of the invention
The object of the present invention is to provide a kind of requirement that can reach state sewage emission standard (GB8378-1996), be applicable to the treatment technology of sewage of high well and deep drilling well.
The objective of the invention is to realize by the following technical solutions:
The treatment technology that is applicable to sewage of high well and deep drilling well provided by the invention, adopted treatment process based on coagulating sedimentation-stair oxidation-biological treatment-secondary oxidation, and auxiliary with the advanced treatment process behind solid-liquid separation, acid-alkali accommodation and the secondary oxidation, specifically comprise following step:
1) in drilling waste water, add 3-20g/L calcium hydroxide, and reaction 15-60min, make its with sewage in sulfonic acid generation chemical precipitation;
The calcium hydroxide that is added can be solid oxidation calcium, or calcium hydroxide emulsion;
2) solid-liquid separation is carried out in the water outlet of step 1);
Separation can be adopted technologies such as air supporting, precipitation, eddy flow, and the air supporting hydraulic detention time is 10-30min; The precipitation hydraulic detention time is 2-8 hour; The eddy flow hydraulic detention time is 5-30min;
In order to quicken segregation rate, when carrying out solid-liquid separation, also can add flocculation agent, as PAM (polyacrylamide), add-on is 2-8mg/l;
3) to step 2) add coagulating agent in the water outlet after the solid-liquid separation, reaction 5~60min carries out coagulation demulsification;
Described coagulating agent is to be selected from Tai-Ace S 150, polymerization hydrogenation aluminium, the aluminum chloride one or more;
4) solid-liquid separation is carried out in the water outlet of step 3), separating technology is with step 2);
5) with the water outlet of step 4), enter Fenton (hydrogen peroxide and ferrous mixed solution) reaction, be difficult to be oxidized to the material of readily biodegradable in the sewage by biolytic organic substance; Water outlet after oxidation neutralizes with alkali, and carries out solid-liquid separation;
In the Fenton reaction, pH is 3~4.5, and the hydrogen peroxide of adding is 1~4 times (preferred 1.5~2.5) of water inlet COD concentration (mg/l), and the ferrous iron of adding and hydrogen peroxide mol ratio are: H 2O 2/ Fe 2+=5~15;
In the Fenton reaction, H 2O 2Dosing method can adopt disposable adding, also can adopt to add for twice;
Oxidization time in the Fenton reaction is 2~12 hours (preferred 4~8 hours);
Can assist ultraviolet, ultrasonic device in the Fenton reaction;
In the solid-liquid separation in this stage, the separating technology of employing is with step 2);
6) water outlet with step 5) enters the two stage biological oxidation pond, and the organism of the readily biodegradable that produces after the Fenton oxidation in step 5) is removed; Water outlet is carried out solid-liquid separation through second-level settling pond;
Hydraulic detention time in the two stage biological oxidation pond is 12~24 hours;
In bio-oxidation is handled (aeration tank), according to COD sewage: N: P=200: the ratio of 5: 1 (weight ratio) adds nitrogenous fertilizer and phosphate fertilizer, and water outlet is carried out solid-liquid separation through settling tank;
7) add 50~200mg/l oxygenant to the step 6) water outlet, be at least the oxidizing reaction of 10min;
Described oxygenant is that ozone is or/and dioxide peroxide;
The reactor that carries out oxidizing reaction in the step 7) comprises bubble tower, sieve-tray tower;
8) after above-mentioned art breading, residual ozone, dioxide peroxide can remove by active carbon filtration in the drilling waste water, also can further remove COD and to the destruction of remaining oxygenant by BAF.
In order to shorten technology, also can be with step 3) and 1) merge, be about to calcium hydroxide and coagulating agent and add simultaneously, at this moment, only carry out a solid-liquid separation and get final product (being step 4) and step 2) merging).
After the treatment technology that is applicable to sewage of high well and deep drilling well provided by the invention is handled, the reached discharging standards of drilling well water.Treatment process provided by the invention both can reduce the influence of blowdown to environment, can save running cost again.
Embodiment
Embodiment 1,
Get the drilling waste water of 2500 meters well depths of certain Jing Kuang, this sewage quality is as shown in table 2.
The water quality of the drilling waste water of table 2, certain Jing Kuang
At first, in sewage, add the calcium hydroxide of 10g/L, reaction 30min make its with sewage in sulfonic acid generation chemical precipitation; Adopt the air supporting method, hydraulic detention time is 20min, carries out solid-liquid separation; PH to 6-9 is regulated in water outlet after solid-liquid separation, adds the polymeric aluminum reaction 30min of 400mg/l again, carries out coagulation demulsification, and the polyacrylamide that adds 2ppm carries out the 30min precipitate and separate; After coagulation process was handled, water outlet transferred to 3.5 with pH and carries out ultrasonic Fenton oxidation (H 2O 2: 1500mg/l, Fe 2+: 5mmol/L) after 4 hours, pH is transferred to neutrality carry out solid-liquid separation; Carry out the aeration and biological pond through Fenton oxidation water outlet and carry out oxidizing reaction, after oxidation in 15 hours, water outlet enters ozone Oxidation Treatment through pH regulator, ozone adding concentration be 100mg/L, reaction times in bubbling be 0.5 hour after activated carbon carries out ozone removes, COD of sewage<150mg/l after above-mentioned art breading, colourity<20 have been satisfied discharging standards fully.

Claims (8)

1. treatment process that is used for sewage of high well and deep drilling well, adopted treatment process based on coagulating sedimentation-stair oxidation-biological treatment-secondary oxidation, and auxiliary with the advanced treatment process behind solid-liquid separation, acid-alkali accommodation and the secondary oxidation, specifically comprise following step:
1) in drilling waste water, add 3-20g/L calcium hydroxide, and reaction 15-60min, make its with sewage in sulfonic acid generation chemical precipitation;
2) solid-liquid separation is carried out in the water outlet of step 1);
3) to step 2) add coagulating agent in the water outlet after the solid-liquid separation, reaction 5~60min carries out coagulation demulsification;
Described coagulating agent is to be selected from Tai-Ace S 150, polymerization hydrogenation aluminium, the aluminum chloride one or more;
4) solid-liquid separation is carried out in the water outlet of step 3), separating technology is with step 2);
5) with the water outlet of step 4), enter the Fenton reaction, be difficult to be oxidized to the material of readily biodegradable in the sewage by biolytic organic substance; Water outlet after oxidation neutralizes with alkali, and carries out solid-liquid separation;
In the Fenton reaction, pH is 3~4.5, and the hydrogen peroxide of adding is 1~4 times of water inlet COD concentration, and the ferrous iron of adding and hydrogen peroxide mol ratio are: H 2O 2/ Fe 2+=5~15;
In the Fenton reaction, H 2O 2Dosing method be disposablely to add or add for twice;
Oxidization time in the Fenton reaction is 2~12 hours;
In the solid-liquid separation in this stage, the separating technology of employing is with step 2);
6) water outlet with step 5) enters the two stage biological oxidation pond, and the organism of the readily biodegradable that produces after the Fenton oxidation in step 5) is removed; Water outlet is carried out solid-liquid separation through second-level settling pond;
Hydraulic detention time in the two stage biological oxidation pond is 12~24 hours;
In bio-oxidation is handled, according to COD sewage: N: P=200: 5: 1 part by weight adds nitrogenous fertilizer and phosphate fertilizer, and water outlet is carried out solid-liquid separation through settling tank;
7) add 50~200mg/l oxygenant to the step 6) water outlet, be at least the oxidizing reaction of 10min;
Described oxygenant is that ozone is or/and dioxide peroxide;
The reactor that carries out oxidizing reaction in the step 7) comprises bubble tower, sieve-tray tower;
8) after above-mentioned art breading, residual ozone, dioxide peroxide remove by active carbon filtration in the drilling waste water, or further remove COD and to the destruction of remaining oxygenant by BAF.
2. the treatment process that is used for sewage of high well and deep drilling well as claimed in claim 1 is characterized in that: the calcium hydroxide that is added in the described step 1) is solid oxidation calcium, or calcium hydroxide emulsion.
3. the treatment process that is used for sewage of high well and deep drilling well as claimed in claim 1 is characterized in that: the separating technology described step 2) is an air-float technology, and the air supporting hydraulic detention time is 10-30min.
4. the treatment process that is used for sewage of high well and deep drilling well as claimed in claim 1 is characterized in that: the separating technology described step 2) is a depositing technology, and the precipitation hydraulic detention time is 2-8 hour.
5. the treatment process that is used for sewage of high well and deep drilling well as claimed in claim 1 is characterized in that: the separating technology described step 2) is an eddy flow technology, and the eddy flow hydraulic detention time is 5-30min.
6. the treatment process that is used for sewage of high well and deep drilling well as claimed in claim 1 is characterized in that: when carrying out solid-liquid separation described step 2), also add flocculation agent.
7. the treatment process that is used for sewage of high well and deep drilling well as claimed in claim 1 is characterized in that: in the Fenton reaction, the hydrogen peroxide of adding is 1.5~2.5 times of water inlet COD concentration in the described step 5); Oxidization time in the Fenton reaction is 4~8 hours.
8. the treatment process that is used for sewage of high well and deep drilling well as claimed in claim 1 is characterized in that: with step 3) and 1) merge, calcium hydroxide and coagulating agent are added simultaneously, only carry out a solid-liquid separation then and get final product.
CN2006101440521A 2006-11-24 2006-11-24 Technique for treating sewage of high well and deep drilling well CN101190822B (en)

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Application Number Priority Date Filing Date Title
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CN101190822B CN101190822B (en) 2011-03-30

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101302067B (en) * 2008-06-12 2011-08-17 四川大学 Innocent treatment technological process for water-based system drilling waste slurry solid-liquid separating medium
CN102206011A (en) * 2010-03-31 2011-10-05 中国石油天然气股份有限公司 Coagulation-oxidation combined type method for processing sewage
CN101700941B (en) * 2009-11-20 2011-11-09 上海应用技术学院 Method for demulsifying and purifying waste emulsion produced by dyeing high-end ribbons
CN102295359A (en) * 2010-06-25 2011-12-28 中国石油化工集团公司 Treatment method for deep-well polysulfide slurry drilling waste water
CN102531291A (en) * 2012-01-16 2012-07-04 中海油能源发展股份有限公司天津分公司 Standard discharge treatment system for rock debris wastewater
CN102040308B (en) * 2009-10-22 2012-08-01 中国石油化工股份有限公司 Method for treating wastewater by combining catalytic oxidation with biological aerated filter
CN102642995A (en) * 2012-05-07 2012-08-22 重庆大学 Method and system for physicochemical biological combined treatment of drilling wastewater of oil and gas field
CN102745867A (en) * 2012-07-19 2012-10-24 中国石油化工股份有限公司 Biochemical treatment method of deep-well polymer-sulfonated category slurry well drilling waste water
CN102786127A (en) * 2012-08-03 2012-11-21 成都凯迈科技有限公司 Coagulant for treating polysulfonate slurry sewage
CN103449685A (en) * 2013-09-26 2013-12-18 中国海洋石油总公司 Method for disposing high-salt high-polymer wastewater through Fenton oxidation and biology combined technology
CN103480639A (en) * 2013-08-23 2014-01-01 中国石油化工集团公司 Composite solidifying and stabilizing treatment method of oil-based drill cutting
CN103723883A (en) * 2013-11-13 2014-04-16 安徽淮化股份有限公司 Treatment method of synthetic rubber production waste water
CN104003578A (en) * 2014-05-28 2014-08-27 中国环境科学研究院 Method for treating industrial wastewater by combined two-stage ozone-biological aerated filter device
CN104307236A (en) * 2014-10-27 2015-01-28 苏州新协力环保科技有限公司 Sewage filtering tank
CN104310700A (en) * 2014-10-13 2015-01-28 山东益源环保科技有限公司 Treatment method for wastewater containing high-concentration organic phosphorus
CN105060573A (en) * 2015-09-16 2015-11-18 成都美富特膜科技有限公司 Gas-field wastewater treatment technology based on special membrane
CN105439368A (en) * 2014-07-31 2016-03-30 中国石油化工股份有限公司 Ethylene waste alkali liquor advanced processing method
CN106242119A (en) * 2016-08-31 2016-12-21 西南石油大学 Discarded sulphonated polymer mud gel breaker and gel breaking method thereof
CN109133403A (en) * 2017-06-16 2019-01-04 江苏立业环境科技有限公司 A kind of drilling platforms waste water treatment process

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US4482459A (en) * 1983-04-27 1984-11-13 Newpark Waste Treatment Systems Inc. Continuous process for the reclamation of waste drilling fluids
CN1569695A (en) * 2003-07-22 2005-01-26 中国科学院生态环境研究中心 Integrated technology and device for processing oil-field well-drilling waste water

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101302067B (en) * 2008-06-12 2011-08-17 四川大学 Innocent treatment technological process for water-based system drilling waste slurry solid-liquid separating medium
CN102040308B (en) * 2009-10-22 2012-08-01 中国石油化工股份有限公司 Method for treating wastewater by combining catalytic oxidation with biological aerated filter
CN101700941B (en) * 2009-11-20 2011-11-09 上海应用技术学院 Method for demulsifying and purifying waste emulsion produced by dyeing high-end ribbons
CN102206011A (en) * 2010-03-31 2011-10-05 中国石油天然气股份有限公司 Coagulation-oxidation combined type method for processing sewage
CN102206011B (en) * 2010-03-31 2012-11-14 中国石油天然气股份有限公司 Coagulation-oxidation combined type method for processing sewage
CN102295359A (en) * 2010-06-25 2011-12-28 中国石油化工集团公司 Treatment method for deep-well polysulfide slurry drilling waste water
CN102295359B (en) * 2010-06-25 2013-09-11 中国石油化工集团公司 Treatment method for deep-well polysulfide slurry drilling waste water
CN102531291A (en) * 2012-01-16 2012-07-04 中海油能源发展股份有限公司天津分公司 Standard discharge treatment system for rock debris wastewater
CN102642995B (en) * 2012-05-07 2014-01-01 重庆大学 Method and system for physicochemical biological combined treatment of drilling wastewater of oil and gas field
CN102642995A (en) * 2012-05-07 2012-08-22 重庆大学 Method and system for physicochemical biological combined treatment of drilling wastewater of oil and gas field
CN102745867A (en) * 2012-07-19 2012-10-24 中国石油化工股份有限公司 Biochemical treatment method of deep-well polymer-sulfonated category slurry well drilling waste water
CN102786127A (en) * 2012-08-03 2012-11-21 成都凯迈科技有限公司 Coagulant for treating polysulfonate slurry sewage
CN103480639B (en) * 2013-08-23 2017-05-17 中国石油化工集团公司 Composite solidifying and stabilizing treatment method of oil-based drill cutting
CN103480639A (en) * 2013-08-23 2014-01-01 中国石油化工集团公司 Composite solidifying and stabilizing treatment method of oil-based drill cutting
CN103449685A (en) * 2013-09-26 2013-12-18 中国海洋石油总公司 Method for disposing high-salt high-polymer wastewater through Fenton oxidation and biology combined technology
CN103449685B (en) * 2013-09-26 2014-09-17 中国海洋石油总公司 Method for disposing high-salt high-polymer wastewater through Fenton oxidation and biology combined technology
CN103723883A (en) * 2013-11-13 2014-04-16 安徽淮化股份有限公司 Treatment method of synthetic rubber production waste water
CN104003578A (en) * 2014-05-28 2014-08-27 中国环境科学研究院 Method for treating industrial wastewater by combined two-stage ozone-biological aerated filter device
CN104003578B (en) * 2014-05-28 2016-01-20 中国环境科学研究院 The method of a kind of pair of section ozone-BAF combined treatment trade effluent
CN105439368A (en) * 2014-07-31 2016-03-30 中国石油化工股份有限公司 Ethylene waste alkali liquor advanced processing method
CN104310700B (en) * 2014-10-13 2016-08-24 山东益源环保科技有限公司 A kind of processing method containing high concentration organism P wastewater
CN104310700A (en) * 2014-10-13 2015-01-28 山东益源环保科技有限公司 Treatment method for wastewater containing high-concentration organic phosphorus
CN104307236A (en) * 2014-10-27 2015-01-28 苏州新协力环保科技有限公司 Sewage filtering tank
CN105060573A (en) * 2015-09-16 2015-11-18 成都美富特膜科技有限公司 Gas-field wastewater treatment technology based on special membrane
CN105060573B (en) * 2015-09-16 2017-05-31 成都美富特膜科技有限公司 Gas field wastewater handling process based on special membrane
CN106242119A (en) * 2016-08-31 2016-12-21 西南石油大学 Discarded sulphonated polymer mud gel breaker and gel breaking method thereof
CN106242119B (en) * 2016-08-31 2019-03-19 西南石油大学 Discarded sulphonated polymer mud gel breaker and its gel breaking method
CN109133403A (en) * 2017-06-16 2019-01-04 江苏立业环境科技有限公司 A kind of drilling platforms waste water treatment process

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