CN101880098B - Oilfield water comprehensive treatment process - Google Patents
Oilfield water comprehensive treatment process Download PDFInfo
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- CN101880098B CN101880098B CN2010102156872A CN201010215687A CN101880098B CN 101880098 B CN101880098 B CN 101880098B CN 2010102156872 A CN2010102156872 A CN 2010102156872A CN 201010215687 A CN201010215687 A CN 201010215687A CN 101880098 B CN101880098 B CN 101880098B
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Abstract
The invention discloses an oilfield water comprehensive treatment process. The process comprises the following steps: (1) passing oilfield water through a settling tank, introducing carbon dioxide into the tank and adding alkali to regulate the pH to be about 12 at the same time, and settling; (2) discharging sediments prepared in step (1) and preparing calcium carbonate by centrifugal drying and dehydration; (3) introducing supernatants prepared in step (1) into a multi-effect evaporation tank to perform vacuum evaporation and prepare solid sodium chloride; (4) further heating and concentrating salt-producing mother liquor by using a concentration tank to obtain concentrated halogen; (5) preparing potassium chloride by using the concentrated halogen; (6) preparing crude bromine by using the mother liquor from the potassium chloride preparation and rectifying the crude bromine to prepare bromine; and (7) recycling the water of which salts are extracted in step (1) to step (6) to use the water as industrial water. The process has the advantages of recycling useful resources from the oilfield water, such as an inorganic salt and the like, and greatly relieving water shortages in oilexploitation areas.
Description
Technical field
The present invention relates to sewage treatment process, especially relate to a kind of comprehensive reutilization treatment process that contains higher oil-field water such as sodium, calcium, chlorine, bromine.
Background technology
Oil-field water is the underground water that directly is communicated with oil (gas) layer.It forms unified fluid system with oil (gas).The underground water in zone, generalized oil-field water general reference oil (gas) field comprises oil (gas) layer water and non-oil (gas) layer water.Oil-field water is the same with oil gas to be present in the hole, hole, seam of reservoir.In a hydrocarbon-bearing pool, all include oil, G&W usually, by gravity segregation, gas is last, and oil is placed in the middle, and water forms oil-gas, oil-water and gas-water table down.Relative position according to oil (gas) water is divided into Di Shui and Bian Shui with oil-field water.End water refers to oil-containing (gas) outer edge with interior water, and the water beyond oil-containing (gas) outer edge is claimed limit water.The oil-field water source has: 1. residual water, or title connate water.Be filled in intergranular pore water during the settling deposition, behind the buried diagenesis of settling, water is stored in the stratum.2. water leaking-in.Atmospheric precipitation, surface water are appeared along the reservoir or tomography, crack penetrate into the water in the reservoir.3. plutonic water.From earth mantle and crust depth high temperature, high salinity, be full of the underground water of gas.The generation of oil, migration, gathering are so that loss all is under the situation that underground water exists, to take place.
Oil is carried out unavoidably has emitting of oil-field water in the process, will not cause great effect to environment if do not handle.Traditional treatment process focuses on removal oil content wherein, and has ignored the comprehensive reutilization of resource wherein.
Summary of the invention
To the problem of above-mentioned proposition, the object of the invention is to provide a kind of and from contain higher oil-field water such as sodium, calcium, chlorine, bromine, comprehensively reclaims the wherein treatment process of resource.
The present invention is achieved in that a kind of oilfield water comprehensive treatment process, takes following process step:
(1), oil-field water is through settling pool, in the pond, feeds carbonic acid gas, adds simultaneously about adjusting PH with base=12, and is heavy clear;
(2), produce lime carbonate with the throw out discharge of step (1) preparation and through the whiz dehydration;
(3), the supernatant of step (1) preparation fed the multiple-effect evaporation jar carry out vacuum-evaporation, produce solid sodium chloride;
(4), further heating is concentrated through concentration tank for salt-making mother liquor, becomes dense halogen;
(5), dense halogen is used to produce Repone K;
(6), the mother liquor produced behind the Repone K is used to produce thick bromine, thick bromine is produced bromine through rectifying;
(7), with step (1)--the water that step (6) is extracted behind the salinity reclaims as process water.
It is following that step (3) solid sodium chloride is produced concrete steps: the supernatant of step (1) preparation is fed the multiple-effect evaporation jar carry out vacuum-evaporation, the sodium chloride crystal that crystallization is separated out in evaporating pot makes solid sodium chloride after centrifugal, drying.
Multiple-effect evaporation jar preferred 3,4 or 5 is imitated evaporating pot, decides according to the content of each composition in the oil-field water.
As a kind of optimal way, step (5) adopts dense stew in soy sauce potassium chloride, at first makes carnallitite through converting halogen technology, and carnallitite adds water decomposition, through flotation, obtains rough Repone K, through washing, spinning, obtains the industrial potassium chloride product again.
As a kind of optimal way, step (6) is: the mother liquor that will produce behind the Repone K feeds the bromine tower, and feeds chlorine oxidation in the mother liquor after producing Repone K; Feed water vapour from the bromine tower bottom simultaneously, the simple substance bromine of separating out after it will be reacted is taken out of together, goes out thick bromine and bromine water through fractionation by distillation; In the thick bromine owing to also contain the chlorine of taking out of; Further rectifying makes bromine separate with chlorine again, finally obtains qualified bromine product.
The calcium sulfate of step (2) preparation also can be as being used to produce sodium-chlor in the crystal seed adding vacuum-evaporator unit in step (3).
On the basis of the oil content of the present invention in traditional removal oil-field water, reclaim resources such as wherein useful lime carbonate, sodium-chlor, Repone K, bromine, again can be with water circulation use.Have useful resources and the nervous advantage of the water resources that can largely alleviate the oil exploiting field in the refiltered oil water in field.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention is done further explain.
A kind of oilfield water comprehensive treatment process, take following process step:
(1), oil-field water is through settling pool, in the pond, feeds carbonic acid gas, hydro-oxidation sodium is transferred about pH=12 simultaneously, and is heavy clear;
(2), the throw out of step (1) preparation is produced lime carbonate through the whiz dehydration;
(3), the supernatant of step (1) preparation fed the quadruple effect evaporating pot carry out vacuum-evaporation, the sodium chloride crystal that crystallization is separated out in evaporating pot makes solid sodium chloride after centrifugal, drying;
(4), with the salt-making mother liquor of step (3) through concentration tank further heating concentrate, become dense halogen;
(5), will go up the dense halogen that step obtains and make carnallitite through converting halogen technology earlier, carnallitite adds water decomposition, through flotation, obtains rough Repone K, through washing, spinning, obtains the industrial potassium chloride product again;
(6), the mother liquor that will produce behind the Repone K feeds the bromine tower, and feeds chlorine oxidation in the mother liquor after producing Repone K, feeds water vapour from the bromine tower bottom simultaneously; The simple substance bromine of separating out after it will be reacted is taken out of together; Go out thick bromine and bromine water through fractionation by distillation, in the thick bromine owing to also contain the chlorine of taking out of, further rectifying again; Bromine is separated with chlorine, finally obtain qualified bromine product;
(7), with step (1)--the water that step (6) is extracted behind the salinity reclaims as process water.
More than be that a kind of oilfield water comprehensive treatment process of the present invention is set forth; Be used for helping to understand the present invention; But embodiment of the present invention is not restricted to the described embodiments; Change, the modification that other any do not deviate under the principle of the invention to be done, substitute, combination, simplify, all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (5)
1. one kind contains sodium, calcium, chlorine, the higher oilfield water comprehensive treatment process of bromine, it is characterized in that taking following process step:
(1), oil-field water is through settling pool, in the pond, feeds carbonic acid gas, adds adjusting PH with base=12 simultaneously, and is heavy clear;
(2), produce lime carbonate with the throw out discharge of step (1) preparation and through the whiz dehydration;
(3), the supernatant of step (1) preparation fed the multiple-effect evaporation jar carry out vacuum-evaporation, produce solid sodium chloride;
(4), further heating is concentrated through concentration tank for salt-making mother liquor, becomes dense halogen;
(5), dense halogen is used to produce Repone K;
(6), the mother liquor produced behind the Repone K is used to produce thick bromine, thick bromine is produced bromine through rectifying;
(7), with step (1)--the water that step (6) is extracted behind the salinity reclaims as process water.
2. a kind of oilfield water comprehensive treatment process according to claim 1; It is characterized in that: it is following that said step (2) solid sodium chloride is produced concrete steps: the supernatant feeding multiple-effect evaporation jar of step (1) preparation is carried out vacuum-evaporation; The sodium chloride crystal that crystallization is separated out in evaporating pot makes solid sodium chloride after centrifugal, drying.
3. a kind of oilfield water comprehensive treatment process according to claim 1 and 2 is characterized in that: said multiple-effect evaporation jar is 3,4 or 5 effect evaporating pots.
4. a kind of oilfield water comprehensive treatment process according to claim 1; It is characterized in that: said step (5) adopts dense stew in soy sauce potassium chloride; At first make carnallitite through converting halogen technology, carnallitite adds water decomposition, obtains system Repone K just; Through washing, spinning, obtain the industrial potassium chloride product again.
5. a kind of oilfield water comprehensive treatment process according to claim 1 is characterized in that: step (6) is: the mother liquor that will produce behind the Repone K feeds the bromine tower, and feeds chlorine oxidation in the mother liquor after producing Repone K; Feed water vapour from the bromine tower bottom simultaneously, the simple substance bromine of separating out after it will be reacted is taken out of together, goes out thick bromine and bromine water through fractionation by distillation; In the thick bromine owing to also contain the chlorine of taking out of; Further rectifying makes bromine separate with chlorine again, finally obtains qualified bromine product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102156872A CN101880098B (en) | 2010-06-30 | 2010-06-30 | Oilfield water comprehensive treatment process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102156872A CN101880098B (en) | 2010-06-30 | 2010-06-30 | Oilfield water comprehensive treatment process |
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| CN101880098A CN101880098A (en) | 2010-11-10 |
| CN101880098B true CN101880098B (en) | 2012-09-19 |
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| CN2010102156872A Expired - Fee Related CN101880098B (en) | 2010-06-30 | 2010-06-30 | Oilfield water comprehensive treatment process |
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| CN108033619A (en) * | 2017-12-04 | 2018-05-15 | 广州黑曜石科技有限公司 | A kind of intelligence water comprehensive processing technique |
| CN108584995B (en) * | 2018-05-28 | 2021-07-09 | 中国地质科学院矿产资源研究所 | Method for comprehensively extracting lithium, potassium and boron from oil field brine |
| CN112707414A (en) * | 2020-12-16 | 2021-04-27 | 云南科力环保股份公司 | Method for removing bromine from high-salinity wastewater |
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| CN100404420C (en) * | 2001-10-22 | 2008-07-23 | 科学与工业研究会 | Recovery of sodium chloride and other salts from brine |
| CN101657379A (en) * | 2007-02-16 | 2010-02-24 | 雅宝公司 | The technology of combination producing bromine, calcium chloride and chlorine |
| CN101613085B (en) * | 2009-07-15 | 2011-05-25 | 中国科学院青海盐湖研究所 | Method for extracting bromine from chloride-calcium type oil field water |
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