CN107601787A - Oilfield heavy crude recovery sewerage deep treatment method - Google Patents
Oilfield heavy crude recovery sewerage deep treatment method Download PDFInfo
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- CN107601787A CN107601787A CN201711066222.3A CN201711066222A CN107601787A CN 107601787 A CN107601787 A CN 107601787A CN 201711066222 A CN201711066222 A CN 201711066222A CN 107601787 A CN107601787 A CN 107601787A
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- sewage
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- sewerage
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Abstract
The present invention relates to petroleum collection field, more particularly to a kind of advanced treatment method of heavy oil sewage.A kind of oilfield heavy crude recovery sewerage deep treatment method, comprises the following steps：Oil removal；Air supporting；Air float liquid is put into anaerobic pond by anaerobic digestion, is maintained at 15 DEG C ~ 45 DEG C, and undegraded sewage is obtained after standing certain time；Oxidative degradation, biological activated carbon being provided with the ozone reaction container, and ozone being passed through into ozone reaction container, sewage of degrading is obtained after standing certain time；Pass through Quick percolation apparatus again, discharged after obtaining water purification.After oilfield heavy crude recovery sewerage deep treatment method of the present invention is by all kinds of impurity in sequential processes sewage, redox processing is being carried out in favor of further degraded operation to the organic compound of script difficult degradation using ozone and biological activated carbon；And there is provided intermediate water tank that handling process is controlled according to the operational characteristic of ozone, ensure the efficiency of ozone biological activated carbon processing, organic pollution COD is reached below 50mg/l, effective guarantee is played for stably reaching standard.
Description
Technical field
The present invention relates to petroleum collection field, more particularly to a kind of advanced treatment method of heavy oil sewage.
Background technology
In the sewage that oilfield heavy crude recovery is formed, pollutant is mainly petroleum-type, suspension（Suspended Substance,
SS）, sulfide, chemical oxygen consumption (COC)（Chemical Oxygen Demand, COD）Deng special according to the water quality of oil recovery water at present
Point, to oil-polluted water generally using the maturation process device of oil removal+air supporting+aerobic/anaerobic reaction, using existing process unit
Oil removing, SS, and then defined discharge standard can be effectively gone, but current China is always using national GB8978-
1996《Integrated wastewater discharge standard》（Hereinafter referred to as " national standard "）.The standard promulgation was in 1996, away from modern 12 years, " national standard "
In the index such as some indexs particularly COD, petroleum-type can not meet existing water environment management and the surface water environment matter in China
Measure up to standard be actually needed.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of oilfield heavy crude recovery sewerage deep treatment method, and this method is led to
After crossing all kinds of impurity in sequential processes sewage, the organic compound of script difficult degradation is entered using ozone and biological activated carbon
Row redox processing is in favor of further degraded operation；And intermediate water tank is provided with to handling work according to the operational characteristic of ozone
Skill is controlled, and is ensured the efficiency of ozone biological activated carbon processing, organic pollution COD is reached below 50mg/l, solve
In the prior art, sewage composition processing is not thorough, the defects of remaining the high COD concentrated waters largely concentrated.
What the present invention was realized in：A kind of oilfield heavy crude recovery sewerage deep treatment method, it is characterized in that, including following step
Suddenly：
S1. oil removal, oilfield heavy crude recovery sewerage is put into oil interceptor, after standing certain time, precipitated in oil interceptor
Heavy oil and impurity is sunk to the bottom, accumulated in pool bottom sludge bucket, entered by discharge pipeline in sludge pipe, remaining is upper strata overflowing liquid；
S2. air supporting, upper strata overflowing liquid is sent into flotation tank, oil emulsion and suspended impurity is removed, obtains air float liquid；
S3. anaerobic digestion, air float liquid is put into anaerobic pond, is maintained at 15 DEG C ~ 45 DEG C, obtained not after standing certain time
Degraded sewage；
S4. ozone oxidation is degraded, and undegraded sewage is sent in ozone reaction container, is provided with the ozone reaction container
Biological activated carbon, and ozone is passed through into ozone reaction container, sewage of degrading is obtained after standing certain time；
S5. it is percolated, by degraded sewage from top to bottom by soil horizon, filter screen and soil enzyme, utilizes upper soll layer aerobe
Degraded and regeneration and soil enzyme absorption, degradation, after obtain water purification after discharge.
Also include step S3.1 between the step S3 and step S4；
Step S3.1, water level control, undegraded sewage is sent in middle housing and is turning to be output in ozone reaction container, in
Between casing according to the output quantity of the undegraded sewage of operating conditions of ozone reaction container.
Also include step S3.2 after the step S3.1,
Step S3.2, filtering, is filtered to undegraded sewage using quartz sand, removes suspension, the glue in undegraded sewage
Body, impurity.
If described use quartz sand to set dried layer quartz sand when being filtered to undegraded sewage, with the stream of undegraded sewage
To for positive direction, if the quartz sand density described in dried layer is from small to large, particle diameter arranges from big to small.
In the step S4, the input quantity of ozone is sent into 5 ~ 50 millis for every liter of undegraded sewage when the ozone oxidation is degraded
Gram ozone.
In the step S1, time of repose of the oilfield heavy crude recovery sewerage in oil interceptor is 5 ~ 10min.
In the step S2, in the conversion zone of the flotation tank, the reaction time is 10~15min.
In the step S4, time of repose of the undegraded sewage in ozone reaction container is 1.5 ~ 3 hours.
In the step S5, the filter screen is Polypropylene.
The standard of water purification described in the step S5 is that organic pollution COD reaches below 50mg/l.
After oilfield heavy crude recovery sewerage deep treatment method of the present invention is by all kinds of impurity in sequential processes sewage, utilizing
Ozone and biological activated carbon carry out redox processing to the organic compound of script difficult degradation in favor of further degraded operation；
And there is provided intermediate water tank that handling process is controlled according to the operational characteristic of ozone, ensure the processing of ozone biological activated carbon
Efficiency, organic pollution COD is reached below 50mg/l, effective guarantee is played for stably reaching standard.
Brief description of the drawings
Fig. 1 is the FB(flow block) of oilfield heavy crude recovery sewerage deep treatment method of the present invention；
Fig. 2 is the structural representation of Quick percolation apparatus equipment therefor in the present invention；
Fig. 3 is the principle schematic that ozone oxidation is degraded in the present invention.
In figure：10 cylinders, 11 water inlets, 12 delivery ports, 13 sample taps, 14 aerobic biodegradation layers, 15 regeneration soil horizons,
16 filter screens, 17 absorption soil enzyme layer.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention stated has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Embodiment 1
As shown in figure 1, a kind of oilfield heavy crude recovery sewerage deep treatment method, comprises the following steps：
S1. oil removal, oilfield heavy crude recovery sewerage is put into oil interceptor, after standing certain time, precipitated in oil interceptor
Heavy oil and impurity is sunk to the bottom, accumulated in pool bottom sludge bucket, entered by discharge pipeline in sludge pipe, remaining is upper strata overflowing liquid；
In the present embodiment preferably, time of repose of the oilfield heavy crude recovery sewerage in oil interceptor is 5 ~ 10min.
Its operation principle is different and reach the purpose of separation using the proportion of suspension in waste water and water.Oil interceptor is direct
On the passage flowed through containing sewage, profit, outlet of sewer is directed at import of the oil water separator with lattice column, set with other
Standby available pipe connects.Oily waste water is passed through, adjusts water level regulation pipe, until oil exit pipe oil extraction not draining, it is qualified to obtain
Oil interceptor water outlet.
S2. air supporting, upper strata overflowing liquid is sent into flotation tank, oil emulsion and suspended impurity is removed, obtains air float liquid；
In the present embodiment preferably, in the conversion zone of the flotation tank, the reaction time is 10~15min.
Its operation principle is integrated with water using compressed air caused by air compressor machine, and substantial amounts of microbubble is produced in water,
It is a variety of in interfacial tension, bubble rising buoyancy and hydrostatic pressure difference etc. to form water, gas and the three-phase mixture for being removed material
Under the collective effect of power, promote after micro air bubble is adhered in the tiny oil droplets being removed, because bonding volume density is less than water and on
Climb up on top of the water, removed so that elaioleucite is separated in water；
S3. anaerobic digestion, air float liquid is put into anaerobic pond, is maintained at 15 DEG C ~ 45 DEG C, obtained not after standing certain time
Degraded sewage.
Its operation principle is that the organic pollution in sewage is decomposed using anaerobe metabolic activity, and organic matter is made
Utilized for the nutrition of microorganism by microorganism, be finally decomposed to stable inorganic matter or synthetic cell material and be used as sludge by water
Middle separation, so that sewage is purified.
Step S3.1, water level control, undegraded sewage is sent in middle housing and is turning to be output to ozone reaction container
In, middle housing is according to the output quantity of the undegraded sewage of operating conditions of ozone reaction container；
Step S3.2, filtering, is filtered to undegraded sewage using quartz sand, removes suspension, the glue in undegraded sewage
Body, impurity；
In the present embodiment, if described use quartz sand to set dried layer quartz sand when being filtered to undegraded sewage, not drop
The flow direction for solving sewage is positive direction, if the quartz sand density described in dried layer is from small to large, particle diameter arranges from big to small；
S4. ozone oxidation is degraded, and undegraded sewage is sent in ozone reaction container, is provided with the ozone reaction container
Biological activated carbon, and ozone is passed through into ozone reaction container, sewage of degrading is obtained after standing certain time；In the present embodiment
In, preferably, time of repose of the undegraded sewage in ozone reaction container is 1.5 ~ 3 hours；
In the present embodiment, preferably, in the step S4, during the ozone oxidation degraded input quantity of ozone for every liter not
Sewage of degrading is sent into 5 ~ 50 milligrams of ozone；
S5. it is percolated, by degraded sewage from top to bottom by soil horizon, filter screen and soil enzyme, utilizes upper soll layer aerobe
Degraded and regeneration and soil enzyme absorption, degradation, after obtain water purification after discharge；In the present invention, the mark of the water purification
Standard reaches below 50mg/l for organic pollutants COD, and effective guarantee is played for stably reaching standard；In the present embodiment, preferably,
The filter screen is Polypropylene；
As shown in Fig. 2 Quick percolation apparatus acting device includes cylinder 10, the cylinder 10 is formed in one or by multiple cartridge filter
It is in series through flange, water inlet 11 is provided with the top of cylinder 10, bottom is provided with delivery port 12, and middle tube wall is provided with multiple
Sample tap 13；Using the flow direction for sewage of degrading as positive direction, the cylinder 10 is sequentially set with aerobic biodegradation layer 14, again
Raw soil horizon 15, filter screen 16 and absorption soil enzyme layer 17.The degraded sewage of entrance is filtered, adsorbed and biological oxidation, is made
Organic pollution COD reaches below 50mg/l, meets newest, most stringent of sewage drainage standard needs.In the present embodiment, make
To be preferred, the filter screen is Polypropylene.
As shown in figure 3, in the present invention, the principle of the ozone oxidation degraded is as follows：
The oxidation-reduction potential of ozone is：
Ozone can aoxidize some elements and organic compound rapidly and widely, in the case of low concentration, also can moment it is complete
Into.The ozone being dissolved in the water is more stable under acid condition again, but when PH or water temperature are raised, the decomposition speed of Pre-Ozonation on Organic Matter
Degree can gradually be accelerated.Specifically ozone molecule（O3）With hydroxyl radical free radical（OH-）Reaction generation superoxide radical（•O2 -）And super oxygen
Change hydroperoxyl radical（HO2•）, superoxide radical（•O2 -）Again with ozone molecule（O3）Reaction and and hydrogen-based（H-）It is smelly with reference to generation hydrogenation
Oxygen radical（HO3•）, then by hydrogenation ozone free radical（HO3•）It is decomposed into oxygen molecule（O2）And hydroxyl free radical（•OH）.It is logical
Cross hydroxyl free radical caused by ozone decomposed（•OH）With than ozone molecule（O3）Stronger oxidability, can be in sewage
Multiring aromatic hydrocarbon, heterocycle compound, chlorinated aromatic compounds of group, organic cyanide, organic synthesis high-molecular compound etc.
Aoxidized, that is to say, that further the efficient oxidation is made to the organic pollution in sewage, is oxidized to be easy to activated carbon easily to inhale
Attached organic particle, colloid pellet, or even change into carbon dioxide and water.
The decomposable process of ozone is a free radical chain reactionses（Radical Chain Reaction）, it is chain at this
In course of reaction, hydroxyl free radical caused by ozone reaction（•OH）Played an important role in ozone treating process, a part
Hydroxyl free radical（•OH）For oxidation Decomposition organic pollution, a part of hydroxyl free radical（•OH）With ozone molecule（O3）With reference to
Into ozone hydroxyl free radical（O3OH•）, ozone hydroxyl free radical（O3OH•）Decomposite oxygen molecule（O2）And it is converted into hydrogen oxide certainly
By base（HO2•）, complete an ozone decomposed process.The oxidation hydroperoxyl radical changed into this decomposable process（HO2•）With surpassing
Oxygen radical（•O2 -）Between have chemical balance relation, so may be constructed a circulation chain reaction, that is, the super oxygen that generates is free
Base（•O2 -）Again with ozone molecule（O3）Effect starts the chain reaction of next circulation, can so react and produce enough hydrogen
Oxygen radical（•OH）, the undegraded sewage for inputting ozone reaction container can thoroughly be aoxidized, so it is living by biology
Property charcoal further biodegradation, it is ensured that COD indexs reach below 50mg/l, play effective guarantee for stably reaching standard.
Claims (10)
1. a kind of oilfield heavy crude recovery sewerage deep treatment method, it is characterized in that, comprise the following steps：
S1. oil removal, oilfield heavy crude recovery sewerage is put into oil interceptor, after standing certain time, precipitated in oil interceptor
Heavy oil and impurity is sunk to the bottom, accumulated in pool bottom sludge bucket, entered by discharge pipeline in sludge pipe, remaining is upper strata overflowing liquid；
S2. air supporting, upper strata overflowing liquid is sent into flotation tank, oil emulsion and suspended impurity is removed, obtains air float liquid；
S3. anaerobic digestion, air float liquid is put into anaerobic pond, is maintained at 15 DEG C ~ 45 DEG C, obtained not after standing certain time
Degraded sewage；
S4. ozone oxidation is degraded, and undegraded sewage is sent in ozone reaction container, is provided with the ozone reaction container
Biological activated carbon, and ozone is passed through into ozone reaction container, sewage of degrading is obtained after standing certain time；
S5. it is percolated, by degraded sewage from top to bottom by soil horizon, filter screen and soil enzyme, utilizes upper soll layer aerobe
Degraded and regeneration and soil enzyme absorption, degradation, after obtain water purification after discharge.
2. oilfield heavy crude recovery sewerage deep treatment method as claimed in claim 1, it is characterized in that：The step S3 and step S4
Between also include step S3.1；
Step S3.1, water level control, undegraded sewage is sent in middle housing and is turning to be output in ozone reaction container, in
Between casing according to the output quantity of the undegraded sewage of operating conditions of ozone reaction container.
3. oilfield heavy crude recovery sewerage deep treatment method as claimed in claim 2, it is characterized in that：After the step S3.1 also
Including step S3.2,
Step S3.2, filtering, is filtered to undegraded sewage using quartz sand, removes suspension, the glue in undegraded sewage
Body, impurity.
4. oilfield heavy crude recovery sewerage deep treatment method as claimed in claim 3, it is characterized in that：It is described to use quartz sand to not
If degraded sewage sets dried layer quartz sand when being filtered, using the flow direction of undegraded sewage as positive direction, if the stone described in dried layer
From small to large, particle diameter arranges sand density from big to small.
5. the oilfield heavy crude recovery sewerage deep treatment method as described in any one claim in claim 1 ~ 4, it is characterized in that：
In the step S4, the input quantity of ozone is sent into 5 ~ 50 milligrams of ozone for every liter of undegraded sewage when the ozone oxidation is degraded.
6. oilfield heavy crude recovery sewerage deep treatment method as claimed in claim 5, it is characterized in that：It is described in the step S1
Time of repose of the oilfield heavy crude recovery sewerage in oil interceptor is 5 ~ 10min.
7. oilfield heavy crude recovery sewerage deep treatment method as claimed in claim 5, it is characterized in that：It is described in the step S2
In the conversion zone of flotation tank, the reaction time is 10~15min.
8. oilfield heavy crude recovery sewerage deep treatment method as claimed in claim 5, it is characterized in that：In the step S4, do not drop
It is 1.5 ~ 3 hours to solve time of repose of the sewage in ozone reaction container.
9. oilfield heavy crude recovery sewerage deep treatment method as claimed in claim 5, it is characterized in that：It is described in the step S5
Filter screen is Polypropylene.
10. oilfield heavy crude recovery sewerage deep treatment method as claimed in claim 5, it is characterized in that：It is net described in the step S5
The standard of water is that organic pollution COD reaches below 50mg/l.
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| CN201711066222.3A CN107601787A (en) | 2017-11-02 | 2017-11-02 | Oilfield heavy crude recovery sewerage deep treatment method |
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| CN201711066222.3A CN107601787A (en) | 2017-11-02 | 2017-11-02 | Oilfield heavy crude recovery sewerage deep treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109502933A (en) * | 2019-01-16 | 2019-03-22 | 中国海洋大学 | A kind of processing method and system containing polyacrylamide waste water |
| WO2019186586A1 (en) * | 2018-03-29 | 2019-10-03 | Kabre Rajiv | A system for treatment of sewage water |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481197A (en) * | 2009-02-17 | 2009-07-15 | 北京世纪华扬能源科技有限公司 | Advanced treatment process and apparatus for oilfield heavy crude recovery sewerage |
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2017
- 2017-11-02 CN CN201711066222.3A patent/CN107601787A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481197A (en) * | 2009-02-17 | 2009-07-15 | 北京世纪华扬能源科技有限公司 | Advanced treatment process and apparatus for oilfield heavy crude recovery sewerage |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019186586A1 (en) * | 2018-03-29 | 2019-10-03 | Kabre Rajiv | A system for treatment of sewage water |
| CN109502933A (en) * | 2019-01-16 | 2019-03-22 | 中国海洋大学 | A kind of processing method and system containing polyacrylamide waste water |
| CN109502933B (en) * | 2019-01-16 | 2021-08-24 | 中国海洋大学 | Method and system for treating wastewater containing polyacrylamide |
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Application publication date: 20180119 |