CN103449674B - A kind for the treatment of Technology for Petroleum Water Flooding applying granular diatomaceous earth - Google Patents
A kind for the treatment of Technology for Petroleum Water Flooding applying granular diatomaceous earth Download PDFInfo
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- CN103449674B CN103449674B CN201310408204.4A CN201310408204A CN103449674B CN 103449674 B CN103449674 B CN 103449674B CN 201310408204 A CN201310408204 A CN 201310408204A CN 103449674 B CN103449674 B CN 103449674B
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Abstract
The present invention relates to a kind for the treatment of Technology for Petroleum Water Flooding applying granular diatomaceous earth, comprise following treatment step: oil removal, air supporting, anaerobic biological treatment, Aerobic biological process, granular diatomaceous earth adsorption filtration etc.Present treatment technique makes oil field extracted water reach one-level emission standard A.This technique is complicated for oil field extracted water organic components, the feature that routine biochemistry-activated carbon process running cost is high, optimization process technique, emphasis strengthens the improvement of adsorption stage, the granular diatomaceous earth of easily regeneration is utilized to substitute or the high gac regenerating difficulty of Some substitute price, guarantee stable water outlet is up to standard, and greatly reduces oil field extracted water treatment operating costs.
Description
Technical field
The present invention relates to a kind of waste water treatment process, in particular, relate to a kind for the treatment of Technology for Petroleum Water Flooding applying granular diatomaceous earth.
Background technology
Oil field extracted water has the features such as high oil-containing, high chemical, high organism, and its waste water water yield is large, complicated component, intractability are large.Generally be difficult to reach one-level emission standard A by the treatment process of biochemistry, present way is normally added activated-carbon device and is carried out advanced treatment after the treatment process of routine, removes remaining organic substance by the method for absorption.Although the method is reliable and stable in technique, but gac is expensive, causes the running cost of sewage to remain high, causes very large economic pressures to Oil-production Enterprises.
Diatomite is that after unicellular lower plant diatom remains accumulation in ancient times, the one formed through preliminary Diagn has porous biological silicite.Its main chemical compositions is silicon-dioxide, containing a small amount of aluminum oxide, ferric oxide, calcium oxide, magnesium oxide etc. and organic matter.The wall shell of diatom has the micropore of a large amount of multilevel ordered arrangement, and the structure of this uniqueness imparts its many excellent performance, its stable chemical nature, and body is light, matter is soft, wear-resisting, heat-resisting etc., and be insoluble to acid, because porosity is large, specific surface area is large, and adsorptivity is strong.Current diatomite is a kind of very general sorbent material and flocculating aids, is widely used in foodstuffs industry, petroleum industry and chemical industry, has aboundresources, cheap, the features such as excellent performance.
Because diatomite has very strong adsorptive power and very large loading capacity, the application in recent years in water treatment is paid close attention to widely, especially in advanced treatment dephosphorization, removing heavy metals etc., shows outstanding performance.But Powdered diatomite is as traditional application mode of sorbent material, shows these raw problems such as sludge yield increases suddenly, secondary pollution is serious, and hence, limit the promotion and application of diatomite technology.
Summary of the invention
The invention provides a kind for the treatment of Technology for Petroleum Water Flooding applying granular diatomaceous earth, present treatment technique can process high oil-containing, high chemical, high organic oil field extracted water, water outlet can reach one-level emission standard A, solves the drawback that existing activated carbon process working cost remains high and regenerates difficulty.
The object of the invention is to be realized by following scheme:
Apply a treatment Technology for Petroleum Water Flooding for granular diatomaceous earth, comprise following treatment step:
(1), oil field extracted water enters in oil trap, by contained heavy oil and oil slick in the effect removal waste water of oil trap;
(2), oil trap water outlet enters air flotation pool, in the mode of air-dissolving air-float by the fine oil droplets separation in waste water.Add chemical agent to air flotation pool and promote air supporting performance, after being separated, gained scum silica frost is removed by skimming plant;
(3) water, through air flotation pool process scummed enters into hydrolysis acidification pool, under the effect of microorganism, realize acidication, strengthens the biodegradability of waste water;
(4), hydrolysis acidification pool water outlet enters Aerobic Pond, and strengthen dissolved oxygen concentration in Aerobic Pond in the mode of blast aeration, the organism in waste water is decomposition and inversion under microbial process, and excess sludge enters sludge treating block;
(5), through the water of Aerobic Pond process enter granular diatomaceous earth adsorption filtration device, remove remaining organism in water by the mode of absorption, remove suspended substance further by the mode of filtering; Water through the process of granular diatomaceous earth adsorption filtration device can reach one-level emission standard A.
The invention has the advantages that: this technique is complicated for oil field extracted water organic components, the feature that routine biochemistry-activated carbon process running cost is high, optimization process technique, emphasis strengthens the improvement of adsorption stage, utilize the gac that granular diatomaceous earth substitutes or Some substitute price is high of easily regeneration, guarantee stable water outlet is up to standard, and greatly reduces oil field extracted water treatment operating costs.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is process flow sheet of the present invention,
Fig. 2 is that of present system flow process implements illustration.
Wherein 1 is sloping plate oil separation tank, and 2 is air-dissolving air-float pond, and 3 is hydrolysis acidification pool, 4 is BAF, and 5 for promoting water pump, and 6 is primary granule diatomite adsorption filtration unit, 7 is secondary granule diatomite adsorption filtration unit, and 8 is tertiary granule diatomite adsorption filtration unit.
Embodiment
See Fig. 1, Fig. 2, a kind for the treatment of Technology for Petroleum Water Flooding applying granular diatomaceous earth of the present invention, comprises following treatment step:
(1), oil field extracted water enters in oil trap, by contained heavy oil and oil slick in the effect removal waste water of oil trap.Oil slick reclaims, and the dregs of fat are discharged to sludge treating block with the form of oily sludge, and the stillness of night enters next process;
(2), oil trap water outlet enters air flotation pool, in the mode of air-dissolving air-float by the fine oil droplets separation in waste water.Add chemical agent to air flotation pool and promote air supporting performance, after being separated, gained scum silica frost is removed by skimming plant, and the stillness of night enters next process;
(3) water, through air flotation pool process scummed enters into hydrolysis acidification pool, under the effect of microorganism, realize acidication, strengthens the biodegradability of waste water;
(4), hydrolysis acidification pool water outlet enters Aerobic Pond, and strengthen dissolved oxygen concentration in Aerobic Pond in the mode of blast aeration, the organism in waste water is decomposition and inversion under microbial process, and excess sludge enters sludge treating block, and the stillness of night enters next process;
(5), through the water of Aerobic Pond process enter granular diatomaceous earth adsorption filtration device, remove remaining organism in water by the mode of absorption, remove suspended substance further by the mode of filtering; Water through the process of granular diatomaceous earth adsorption filtration device can reach one-level emission standard A, can arrange outward or the rear reuse of process further according to practical situation.
According to oil field extracted water water quality, described oil trap can be the one in advection oil separation tank, sloping plate oil separation tank, oil removing pot etc.
According to oil field extracted water water quality, described air flotation pool adds chemical agent, and can be the one in the medicaments such as poly-aluminium, Polyferric Sulfate, polyacrylamide or arbitrary combination, air flotation pool water outlet oleaginousness be down to below 20mg/L.
The organism of difficult for biological degradation is converted into biodegradable organic by described hydrolysis acidification pool under the effect of anerobe and double oxygen bacterium, and hydrolysis acidification pool water outlet biochemical oxygen demand (BOD) and chemical oxygen demand (COD) ratio will be equal to or greater than 0.3.
Described Aerobic Pond can be the combination of any one or several in aeration tank, SBR pond, CASS pond, BAF, contact-oxidation pool etc., and Aerobic Pond water outlet chemical oxygen demand (COD) is 120-200mg/L.
Described granular diatomaceous earth adsorption filtration device is strict plug flow reactor, and reactor cross section can be rectangle, circle or other shapes.
Described granular diatomaceous earth adsorption filtration device can be the one in single stage adsorption, double stage tandem absorption or plural serial stage absorption, specifically can arrange according to water quantity and quality situation.
In described granular diatomaceous earth adsorption filtration device, granular diatomaceous earth adopts one-level diatomite sintering to make, and sintering temperature is 1000-1200 DEG C; Granular diatomaceous earth particle diameter is 1-5mm; Tap density is 0.75g/cm
3; Angle of repose is 23 °; The granular diatomaceous earth optimal adsorption time is 60min.
In described granular diatomaceous earth adsorption filtration device, after granular diatomaceous earth absorption is saturated, under 500-600 DEG C of high temperature, calcination 1-2h can realize effective regeneration; The device that temperature can reach 500-600 DEG C all can be used for granular diatomaceous earth regeneration, without the need to special regenerating unit.
In described granular diatomaceous earth adsorption filtration device, granular diatomaceous earth shows stronger absorption property, as methylene dichloride, tetracol phenixin etc. for the polynary halohydrocarbon of oil field extracted water small molecular.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Shown in Fig. 2 is a kind of embodiment applying the treatment Technology for Petroleum Water Flooding of granular diatomaceous earth of the present invention, comprise following treatment step: (1) oleaginousness 3000mg/L oil field extracted water enters in sloping plate oil separation tank 1, remove oil slick contained in waste water, coarse particles oil and heavy oil by the effect of sloping plate oil separation tank 1, water outlet oleaginousness is down to 200mg/L; (2) sloping plate oil separation tank 1 water outlet enters air-dissolving air-float pond 2, air-dissolving air-float pond 2 water outlet oleaginousness 20mg/L, and the waste water that (3) process through air-dissolving air-float pond 2 enters hydrolysis acidification pool 3, strengthens the biodegradability of waste water; (4) hydrolysis acidification pool 3 water outlet enters BAF 4, and BAF 4 water outlet chemical oxygen demand (COD) is down to below 120mg/L; (5) BAF 4 water outlet enters tertiary granule diatomite adsorption filtration unit 6,7,8 successively through promoting water pump 5, under the synergy of adsorbing and filter, chemical oxygen demand (COD) declines gradually, primary granule diatomite adsorption filtration unit 6 water outlet chemical oxygen demand (COD) is 80-90mg/L, secondary granule diatomite adsorption filtration unit 7 water outlet chemical oxygen demand (COD) is 60-70mg/L, and tertiary granule diatomite adsorption filtration unit 8 water outlet chemical oxygen demand (COD) is down to below 50mg/L; The water outlet of tertiary granule diatomite adsorption device 8 reaches one-level emission standard A and arranges outward.
In this embodiment, granular diatomaceous earth adopts one-level diatomite sintering to make, and sintering temperature is 1000-1200 DEG C; Granular diatomaceous earth particle diameter is 1-5mm; Tap density is 0.75g/cm
3; Angle of repose is 23 °; The granular diatomaceous earth single stage adsorption time is 20min, and total adsorption time is 60min.
In this embodiment, after granular diatomaceous earth is saturated, be placed in rotary kiln calcination 2h, effective regeneration, regeneration rate is more than 98%.
In this embodiment, after treatment, in final outflow water, acetone, methylene dichloride, toluene, n-undecane, tetracol phenixin, benzene equal size are all less than 1ug/L to oil field extracted water.
Claims (1)
1. apply a treatment Technology for Petroleum Water Flooding for granular diatomaceous earth, it is characterized in that, comprise following treatment step:
(1) oleaginousness 3000mg/L oil field extracted water enters in sloping plate oil separation tank, and remove oil slick contained in waste water, coarse particles oil and heavy oil by the effect of sloping plate oil separation tank, water outlet oleaginousness can be down to 200mg/L;
(2) sloping plate oil separation tank water outlet enters air-dissolving air-float pond, air-dissolving air-float pond water outlet oleaginousness 20mg/L;
(3) waste water through the process of air-dissolving air-float pond enters hydrolysis acidification pool, strengthens the biodegradability of waste water;
(4) hydrolysis acidification pool water outlet enters BAF, and effluent of aeration biological filter chemical oxygen demand (COD) is down to below 120mg/L;
(5) effluent of aeration biological filter enters tertiary granule diatomite adsorption filtration unit successively through promoting water pump, under the synergy of adsorbing and filter, chemical oxygen demand (COD) declines gradually, primary granule diatomite adsorption filtration unit water outlet chemical oxygen demand (COD) is 80-90mg/L, secondary granule diatomite adsorption filtration unit water outlet chemical oxygen demand (COD) is 60-70mg/L, and tertiary granule diatomite adsorption filtration unit water outlet chemical oxygen demand (COD) is down to below 50mg/L; The water outlet of tertiary granule diatomite adsorption device reaches one-level emission standard A and arranges outward;
Granular diatomaceous earth adopts one-level diatomite sintering to make, and sintering temperature is 1000-1200 DEG C; Granular diatomaceous earth particle diameter is 1-5mm; Tap density is 0.75g/cm
3; Angle of repose is 23 °; The granular diatomaceous earth single stage adsorption time is 20min, and total adsorption time is 60min;
After granular diatomaceous earth is saturated, be placed in rotary kiln calcination 2h, can effective regeneration, regeneration rate is more than 98%;
After treatment, in final outflow water, acetone, methylene dichloride, toluene, n-undecane, tetracol phenixin, benzene content are all less than 1ug/L to oil field extracted water.
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| CN105481090B (en) * | 2015-12-29 | 2018-09-25 | 北京京城环保股份有限公司 | A kind of denitrification filter pool device and method applying granular diatomaceous earth |
| CN105923930A (en) * | 2016-07-08 | 2016-09-07 | 吴印强 | Biological treatment technology for sewage |
| CN109502675B (en) * | 2018-12-15 | 2021-06-08 | 浙江大学自贡创新中心 | Efficient oil-water separation method for different oil drop particle sizes |
| CN110183045A (en) * | 2019-06-03 | 2019-08-30 | 拜城县众泰煤焦化有限公司 | Biochemical automatic control device |
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| CN101597127A (en) * | 2009-06-22 | 2009-12-09 | 宇星科技发展(深圳)有限公司 | A kind of coking waste water treatment process and treatment facility thereof |
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