CN104030522B - Deep treatment device for ternary composite flooding oilfield oil production wastewater - Google Patents
Deep treatment device for ternary composite flooding oilfield oil production wastewater Download PDFInfo
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- CN104030522B CN104030522B CN201410227907.1A CN201410227907A CN104030522B CN 104030522 B CN104030522 B CN 104030522B CN 201410227907 A CN201410227907 A CN 201410227907A CN 104030522 B CN104030522 B CN 104030522B
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Abstract
The invention discloses a deep treatment device for ternary composite flooding oilfield oil production wastewater. The device is divided into an air floatation treatment process section (1), a microbial treatment process section (2), an advanced oxidation treatment process section (3) and a filtration treatment process section (4), wherein the air floatation treatment process section (1) is provided with an oil receiving and discharge system (5), and the microbial treatment process section (2) is provided with a sludge treatment system (6). Each process section of the device has an independent function and achieves different effluent standard respectively, meanwhile, the upper and lower process sections are matched with each other and support each other, and the quality of the effluent treated by the device can reach the standard requirement of oilfield low-permeability reservoir reinjection water.
Description
Technical field:
The present invention be directed to the device that alkaline surfactant polymer flooding oil-field wastewater oil removing, oil removal and reduction viscosity carry out advanced treatment.Relate to a kind of ternary composite driving oil field oil extraction waste water advanced treatment apparatus.
Background technology:
Along with the exploitation in oil field deepens continuously, tertiary oil recovery technology has become Daqing oil field and even one of major measure of oil recovery factor is improved in the whole nation.But tertiary oil recovery is while raising oil recovery factor, and what bring is that recovered water oily water separation difficulty strengthens, and is embodied in: the viscosity of recovered water increases; Oil droplet in recovered water diminishes; Water-oil interface moisture film intensity increases; Between oil droplet, coalescence becomes the ability of large oil droplet to decline; The complicated phenomenon aggravation of water quality; In water, the removal difficulty of oil-containing and suspended substance increases.Ternary composite driving oil field oil extraction waste water has: viscosity increases, the oil droplet in water diminishes, water-oil interface moisture film intensity increases, between oil droplet coalescence become that the ability of large oil droplet declines, the complicated phenomenon aggravation of water quality, the water quality characteristic such as removal difficulty increase of oil-containing and suspended substance in water.
Containing a large amount of polymkeric substance (polyacrylamide) and tensio-active agent in the oil extraction waste water of ternary composite driving oil field, intractability is more much bigger than water drive recovered water, and oily water separation difficulty strengthens.In water water quality containing gathering more than 600mg/L, it is serious that oil-in-water drips emulsion, if again containing a certain amount of tensio-active agent, this kind of sewage will be in extremely stable situation, Typical physical method is difficult to reach ideal effect, meanwhile, there is floor space large, the problems such as treatment scheme is long.
At present poly-ly to drive, the advanced treatment water yield that ternary drives development requires rises year by year, there is the insufficient water sources of degree of depth water, the outstanding problems such as construction investment increases year by year, the construction object that proposition will realize " poly-drive water exit re-injection poly-drive block, ternary drive water exit re-injection ternary drives block ".The optimization that this measure is conducive to oilfield sewage ground system simplifies, can the normal operation of effective guarantee current water drive Sewage treatment systems, reduction sink drainage different quality, different geographical allocate quantities mutually, alleviate oilfield water flooding degree of depth water insufficient water sources problem, simplify sink drainage and produce note balance, avoid wastewater disposition etc.
Therefore, analyze for conventional oil field treatment process, in water containing high concentration polymer and surfactant, conventional sedimentation, filtration have been difficult to reach design requirements, need consider to use other treatment process to carry out advanced treatment to water.
Summary of the invention:
In order to overcome the deficiency existed in background technology, the object of the invention is to provide a kind of ternary composite driving oil field oil extraction waste water advanced treatment apparatus.Main flow of the present invention is followed successively by air-flotation process process section, micro-organism treatment process section, Advanced Oxidation Technics in Dealing section and filtration treatment process section.Oil in water emulsion in sewage is carried out breakdown of emulsion degraded by micro-organism treatment process section, within the oleaginousness in water is reduced to 50 ㎎/L; Sewage, after micro-organism treatment process section, is promoted to the catalytic oxidation tank of Advanced Oxidation Technics in Dealing section, completes contact oxidation at catalytic oxidation tank by lift pump, by the organic pollutant chain rupture in ternary sewage, degraded, make ternary sewage reduce viscosity.Viscosity is filtered through filtration treatment process section after reducing again, remove the suspended substance in water, final realization is to the process of ternary composite driving oil field oil production waste water in oil field, water outlet oil-containing after process is not higher than 5 ㎎/L, suspended substance is not more than 5 ㎎/L, median particle size is not more than 2 μm, and effluent quality reaches oil field low-permeability oil deposit reinjected water standard or returns joins standard-required.
The technical solution adopted in the present invention is: this device is divided into air-flotation process process section, micro-organism treatment process section, Advanced Oxidation Technics in Dealing section, filtration treatment process section, and micro-organism treatment process section is equipped with sludge treating system;
Above-mentioned air-flotation process process section is divided into zone of action, disengaging zone, exhalant region, Shou You district, zone of action is connected with water distributor, water distributor is provided with viscosity on-line checkingi device, in zone of action, dissolved air release is installed, the inlet end of dissolved air release is communicated with pressure regulator valve and dissolving successively, the inlet end of dissolving connects dissolved air water pump and air compressor respectively, the water pipeline that dissolved air water pump intake end connects communicates with exhalant region, zone of action and disengaging zone are opened by baffle for separating, dividing plate upper surface bends to direction, disengaging zone, Shou You is provided with Oil scraper in district, Oil scraper is by motor drive, sump oil in Shou You district is scraped into collection tank, collection tank is communicated with fuel reserve tank, the exit end of fuel reserve tank connects the inlet end receiving oil pump, water tank is provided with in exhalant region, water tank is communicated with header, the inlet end of header is positioned at bottom, zone of action,
Above-mentioned micro-organism treatment process section comprises device body, device body is divided into one ~ level Four breaking milk and removing oil district and solid-liquid separator, solid-liquid separator is made up of the settling section of fore portion and the gas-solution water generator of rear section, in every one-level breaking milk and removing oil district, stuffing box support is installed, modular combination stuffing box is installed in stuffing box support; Every one-level breaking milk and removing oil district inner sidewall upper portion is provided with effluent weir, effluent weir is communicated with water distributor, water distributor also communicates with next stage breaking milk and removing oil district through breaking milk and removing oil district sidewall to downward-extension, in device body, aerating system is installed, aerating system is made up of Aeration fan, aeration pipeline, aeration head, device body internal upper part is provided with scrapes oil system, scrapes oil system and is made up of Oil scraper, collection tank;
Above-mentioned Advanced Oxidation Technics in Dealing section comprises air coarse filter, air coarse filter is by pipeline joint noise reduction device successively, air compressor, air cooling driers, air fine filter, oxygenerator, reactive gas generating unit, catalytic oxidation tank, tail gas recycle device, wherein: tail gas recycle device is provided with reactive gas on-line checkingi device, reactive gas generating unit is connected with circulating water cooling system, catalytic oxidation tank is provided with COD on-line monitoring device, COD on-line monitoring device and reactive gas generating unit are connected with PLC signal wire respectively, the COD value of water is converted into electric signal transmission to PLC by COD on-line monitoring device, after the controlling curve of COD value and storage is compared by PLC, adjust the power of reactive gas generating unit, make it to adapt with water water quality.
Above-mentioned filtration treatment process section comprises two-stage filtration, wherein one-level is sandfiltration pot, secondary is fine filter, fine filter is divided into upper cavity, lower chamber, upper cavity upper surface adopts on fast-open type upper cover and installs multiple filter bag, filter bag upper shed communicates with upper cavity, filter bag adopts inner frame and purchasing ore to fix, inner frame and purchasing ore are fixed on dividing plate, lower chamber bottom is connected with positive filter influent mouth, just leach the mouth of a river, positive filter influent mouth extends inwardly through lower chamber and is connected with upper cavity, positive filter influent mouth and outside positive filter influent valve, backwash outlet valve connects, just leach the mouth of a river and just leach water valve with outside, backwash water intaking valve connects, backwash water intaking valve connects backwashing pump, positive filter influent valve, backwash outlet valve, just leach water valve, backwash water intaking valve, backwashing pump is connected with controller signals respectively.
Above-mentioned sludge treating system comprises sludge concentrating pot, the water outlet pipeline that sludge concentrating pot top connects is connected with the water inlet pipe of micro-organism treatment process section, sludge concentrating pot bottom goes out mud pipeline and is connected with the inlet end of centrifuge, the exit end of centrifuge is connected with the inlet end of worm conveyor, and the water outlet pipeline going out mud pipeline and top connection of sludge concentrating pot bottom connection is separately installed with recovered water pump.
Master control system of the present invention adopts DCS distributed control system, and each process section all has independently PLC, and all PLC, completing while this process section controls automatically, realize centralized displaying and comprehensive coordinate by DCS distributed control system.The automatic control content of each process section comprises: 1. air-flotation process process section is by viscosity on-line monitoring system, the viscosity of Real-Time Monitoring water, PLC control system Real-time Collection viscosity, on-line monitoring system viscosity signal, and according to water viscosity B coefficent situation, the aperture of automatic pressure regulation variable valve and the frequency-variable controller of dissolved air water pump, real-time regulable control is carried out to the pressure of device dissolved air water and flow, thus realizes bubble diameter size adjustment, control reflux ratio simultaneously; 2. micro-organism treatment process section is the related data being gathered water by COD on-line monitoring system and viscosity on-line detecting system, viscosity stored in PLC comparable data storehouse and COD data are compared, determine Aeration fan aeration rate, PLC, realizes automatically regulating the real-time online of aeration rate in device body by controlling the frequency-variable controller of Aeration fan by this aeration rate; 3. Advanced Oxidation Technics in Dealing section is, by COD on-line monitoring system, the COD value of water is converted into electric signal transmission to PLC, after the controlling curve of COD value and storage is compared by PLC, adjust the power of reactive gas generation systems, make it to adapt with water water quality.
Beneficial effect of the present invention is: main flow of the present invention is followed successively by air-flotation process process section, micro-organism treatment process section, Advanced Oxidation Technics in Dealing section and filtration treatment process section.Wherein air-flotation process process section is mainly for the treatment of the dispersed oil in the oil extraction waste water of ternary composite driving oil field and part oil in water emulsion, utilizes flotation technology to make oily water separation, and reclaims the sump oil after being separated; Micro-organism treatment process section mainly adopts microorganism by not removed remaining oil in water emulsion in the ternary composite driving oil field oil extraction waste water after the process of air-flotation process process section, carry out microbial de-emulsification separation, and the sump oil after being separated is reclaimed, fail the oil in water emulsion of break milk separation and carry out biological degradation removal; Advanced Oxidation Technics in Dealing section is mainly for the treatment of the depth degradation of organic pollutant in the ternary composite driving oil field oil extraction waste water after the process of micro-organism treatment process section, simultaneously, utilize oxygenizement, chain rupture is carried out to polymkeric substance in ternary sewage, thus effectively reduce former water viscosity, make former water viscosity close to normal clear water value, greatly reduce the difficulty of subsequent treatment process; Filtration treatment process section is mainly used in the sewage after to advanced oxidation and filters, remove remaining sump oil and suspended solids, and water outlet suspended solids median particle size is control effectively, ensure that effluent quality reaches oil field low-permeability oil deposit reinjected water standard or returns and join standard-required.
Accompanying drawing illustrates:
Accompanying drawing 1 is schematic diagram of the present invention.
Accompanying drawing 2 is sludge drainage system structure iron of the present invention.
Accompanying drawing 3 is robot control system(RCS) schematic diagram of the present invention.
Accompanying drawing 4 is that air-flotation process process section of the present invention is except oil type structural representation.
Accompanying drawing 5 is vertical views of accompanying drawing 4.
Accompanying drawing 6 is accompanying drawing 5A-A sectional views.
Accompanying drawing 7 air-flotation process process section of the present invention is except outstanding type structural representation.
Accompanying drawing 8 is vertical views of accompanying drawing 7.
Accompanying drawing 9 is structural representations of micro-organism treatment process section of the present invention.
Accompanying drawing 10 is vertical views of accompanying drawing 9.
Accompanying drawing 11 is schematic diagram scraping oil system local of micro-organism treatment process section of the present invention.
Accompanying drawing 12 is modular combination stuffing box structural representations in accompanying drawing 9.
Accompanying drawing 13 is effluent weir structural representations of micro-organism treatment process section of the present invention.
Accompanying drawing 14 is micro-organism treatment process section light-weight cover board structural representations of the present invention.
Accompanying drawing 15 is micro-organism treatment process section light-weight cover board scheme of installations of the present invention.
Accompanying drawing 16 is structural representations of Advanced Oxidation Technics in Dealing section of the present invention.
Accompanying drawing 17 is schematic flow sheets of Advanced Oxidation Technics in Dealing section of the present invention.
Accompanying drawing 18 is structural representations of filtration treatment process section of the present invention.
Accompanying drawing 19 is that filtration treatment process section of the present invention just filters view.
Accompanying drawing 20 is filtration treatment process section backwash view of the present invention.
Accompanying drawing 21 is structure of filter bag figure in accompanying drawing 18.
Accompanying drawing 22 is filtration treatment process section pulse backwashing intensity control schematic diagram of the present invention.
Embodiment:
Shown in accompanying drawing, this ternary composite driving oil field oil extraction waste water advanced treatment apparatus comprises air-flotation process process section 1, micro-organism treatment process section 2, Advanced Oxidation Technics in Dealing section 3, filtration treatment process section 4 four process sections.Auxiliary process comprises the receipts oil oil draining system 5 of air-flotation process process section 1, the sludge treating system 6 of micro-organism treatment process section 2.Each process section all has independently function, not only cooperatively interacts but also mutually support up and down between process section simultaneously.
First air-flotation process process section is entered for process oil production waste water in oil field, described air-flotation process process section is divided into zone of action 1-1, disengaging zone 1-2,1-3, Shou You district, exhalant region 1-4, zone of action 1-1 is connected with water distributor 1-5, water distributor 1-5 is provided with viscosity on-line checkingi device 1-19, dissolved air release 1-6 is installed in zone of action 1-1, dissolved air release 1-6, arranges in the mode of symmetric array for benchmark with device medullary ray.The inlet end of dissolved air release 1-6 is communicated with pressure regulator valve 1-21 and dissolving 1-12 successively, the inlet end of dissolving 1-12 connects dissolved air water pump 1-13 and air compressor 1-14 respectively, the water pipeline that dissolved air water pump 1-13 inlet end connects communicates with exhalant region 1-3, zone of action 1-1 and disengaging zone 1-2 is separated by dividing plate 1-7, dividing plate 1-7 upper surface bends to 1-2 direction, disengaging zone, in Shou You district 1-4, Oil scraper 1-10 is installed, Oil scraper 1-10 is driven by electric motor 1-11, sump oil in Shou You district 1-4 is scraped into collection tank 1-9, collection tank 1-9 is communicated with fuel reserve tank 1-16, the exit end of fuel reserve tank 1-16 connects the inlet end receiving oil pump 1-17, water tank 1-15 is provided with in the 1-3 of exhalant region, water tank 1-15 is communicated with header 1-8, the inlet end of header 1-8 is positioned at 1-1 bottom, zone of action.Effectively the residence time is 40min to air-flotation process process section 1, and floatation reflux ratio is not more than 30%.When water oil-containing be not more than 350 ㎎/L at 1000 ~ 3000 ㎎/L, suspended substance, viscosity be not more than 15mPas time, water outlet oil-containing is not more than 250 ㎎/L at 150 ~ 400 ㎎/L, suspended substance.
As shown in Figure 4, Figure 5, the arranged direction of air-flotation process process section water distributor 1-5 is identical with the arranged direction of Oil scraper 1-10, dissolved air release 1-6 installation site is corresponding with the position of water distributor 1-5, and the arranged direction of dividing plate 1-7 is parallel with Oil scraper 1-10 frizing direction.Water (flow) direction is vertical with the rotation direction of Oil scraper.Be captured in zone of action 1-1 by the oil droplet in dividing plate water and suspended substance, the oil slick climbed up on top of the water is received in fuel reserve tank along current vertical direction by Oil scraper, because water (flow) direction is moved along the direction that casing is shorter, oil slick on climbing up on top of the water can be put away by Oil scraper timely, and there is extraordinary effect in institute for oil removing by this way.But exactly because stream course is shorter, like this and be unfavorable for that density is greater than the sedimentation of water suspension, therefore this scheme is comparatively applicable to process containing innage, containing the ternary composite driving oil field recovered water that suspended substance is less.
As shown in Figure 7, Figure 8, the arranged direction of air-flotation process process section water distributor 1-5 and the arranged direction of Oil scraper 1-10 perpendicular, dissolved air release 1-6 installation site is corresponding with the position of water distributor 1-5, and arranged direction and the Oil scraper 1-10 frizing direction of dividing plate 1-7 are perpendicular.Be provided with inclined plate packing 1-18 in the middle part of the 1-2 of disengaging zone, inclined plate packing 1-18 is tetrafluoroethylene material.Its constructional feature is water (flow) direction is consistent with the rotation direction of Oil scraper.By dividing plate, water is contacted in zone of action fully with dissolved air water, then enter relatively long disengaging zone to be separated, because this region is longer, clearance for the larger suspension of density can be higher, it is high that institute is comparatively applicable to process suspension content by this way, the ternary composite driving oil field recovered water that oil-containing is less.
Air-flotation process process section viscosity on-line monitoring device 1-19, pressure regulator valve 1-22, dissolved air water pump 1-13 are connected with PID controller 1-20 signal wire respectively, PID controller 1-20 Real-time Collection viscosity on-line monitoring device 1-19 viscosity signal, and according to water viscosity B coefficent situation, the aperture of automatic pressure regulation variable valve 1-21 and the frequency-variable controller of dissolved air water pump 1-13, carry out real-time regulable control to the pressure of device dissolved air water and flow.
The ultimate principle of air-flotation process process section 1 utilizes flotation technology, by dissolving in small bubble in sewage, and separate out from water with micro-bubble form and become carrier, the mode of being flocculated by dosing or naturally adsorbing, flocculate mutually with the material of density close to water, the pollution substances such as the oil in water emulsion in waste water, small suspended particle are made to stick on bubble, make the flco total body density after flocculation much smaller than water, after in bubble surface attached water, oil droplet and floc particle float to the water surface, realization oil, solid are separated with water.By collecting the object that foam or scum silica frost reach separating impurity, purify waste water, flotation process is mainly used to process in waste water and is difficult to the oil in water emulsion of removal or the relative density small suspended particle close to water by natural subsidence.The effect of air-flotation process process section is by air supporting removal, reclaims overwhelming majority dispersion sump oil and part oil in water emulsion in sewage, simultaneously by the tank body useful volume equilibrium water water yield and water quality.
Water after air-flotation process process section 1 processes enters micro-organism treatment process section 2, as shown in FIG. 9 and 10, described micro-organism treatment process section 2 comprises device body 2-1, device body 2-1 is divided into one ~ level Four breaking milk and removing oil district and solid-liquid separator 2-12, solid-liquid separator 2-12 is made up of the settling section 2-9 of fore portion and the gas-solution water generator of rear section, in every one-level breaking milk and removing oil district, stuffing box support 2-5 is installed, modular combination stuffing box 2-4 is installed in stuffing box support 2-5; Every one-level breaking milk and removing oil district inner sidewall upper portion is provided with effluent weir 2-7, effluent weir 2-7 is communicated with water distributor 2-8, water distributor 2-8 also communicates with next stage breaking milk and removing oil district through breaking milk and removing oil district sidewall to downward-extension, aerating system 2-2 is installed in device body 2-1, aerating system 2-2 is made up of Aeration fan 2-13, aeration pipeline, aeration head 2-3, the form that aeration head 2-3 installs is symmetrical matrix column, arranges successively centered by aeration pipeline.Device body 2-1 internal upper part is provided with scrapes oil system, scrapes oil system and is made up of Oil scraper 2-10, collection tank 2-11.The facade of wherein effluent weir 2-7 is compounded with subplate 2-18, and the two ends of subplate 2-17 have been threaded leading screw, and leading screw is fixed on the inwall of device body 2-1, and subplate 2-18 can move up and down relative to the facade of effluent weir 2-7.Be provided with shore pipe 2-6 with holes bottom device body 2-1, shore pipe 2-6 exit end is provided with valve.Be coated with cover plate at device top, cover plate is made up of light-weight cover board 2-17 and cement casting cover plate interval.Effective residence time of micro-organism treatment process section (2) is 14h ~ 16h.When water oil-containing be not more than 250 ㎎/L at 150 ~ 400 ㎎/L, suspended substance, viscosity be not more than 15mPas time, micro-organism treatment process section (2) water outlet oil-containing is not more than 50 ㎎/L, suspended substance is not more than 150 ㎎/L.
The principle of the receipts oil oil draining system 5 of described micro-organism treatment process section 2 utilizes electric reducer to drive chain type transmission mechanism, and scraper plate is installed in segmentation on chain, drives the scraper plate on chain to complete the motion of horizontal line style when electric reducer rotates.When scraper plate touches liquid level, just the emersion thing on liquid level is collected in collection tank.Receive oily oil draining system 5 collect air-flotation process process section 1 dissolved air flotation after dispersed oil, and a small amount of oil in water emulsion in micro-organism treatment process section 2 after breakdown of emulsion, and import fuel reserve tank 13, through oil drain pump, it is recycled to crude oil gathering system in the lump again, effectively prevent the wasting of resources, achieve resource secondary and reclaim.
Micro-organism treatment process section 2 carry out water pipeline is separately installed with COD on-line monitoring device 2-14 and viscosity on-line checkingi device 2-15, COD on-line monitoring device 2-14, viscosity on-line checkingi device 2-15 is connected with PLC 2-16 signal wire respectively with Aeration fan 2-13, COD on-line monitoring device 2-14 and viscosity on-line checkingi device 2-15 gathers the related data of water, viscosity stored in PLC 2-16 comparable data storehouse and COD data are compared, determine Aeration fan 2-13 aeration rate, PLC 2-16 is by the frequency-variable controller of this aeration rate by control Aeration fan 2-13, realize automatically regulating the real-time online of aeration rate in device body.
Micro-organism treatment process section 2 utilizes microorganism species to carry out breakdown of emulsion and degraded to the oil in water emulsion in the oil extraction waste water of ternary composite driving oil field.Ternary composite driving oil field oil extraction waste water after air-flotation process process section 1 oil removing enters into micro-organism treatment process section 2, already present microorganism joint in water and water body in micro-organism treatment process section, oil in water emulsion in this process in water can by the microbial de-emulsification in water, degraded, in water, microorganism is consumed using oil as carbon source, thus realizes the function of oil removing.
Microorganism is divided into following several situation to the degraded of oil-containing in water: one, the microbiological deterioration of paraffinic hydrocarbons: the 1. terminal methyl group of microorganism attack paraffinic hydrocarbons, by mixed-function oxidase catalysis, generate primary alconol, be further oxidized to aldehyde and lipid acid again, lipid acid is then by the further metabolism of β-oxidation.2. the secondary end of some microorganism attack alkane, the carbon atom in chain inserts oxygen.Like this, first generate secondary alcohol, then be oxidized further, generate ketone, ketone again metabolism is ester, and ester bond cracking generates primary alconol and lipid acid.Alcohol then continues to be oxidized to aldehyde, carboxylic acid, and carboxylic acid is then by the further metabolism of β-oxidation.Two, the naphthenic hydrocarbon not possessing terminal methyl group carries out biological degradation by being similar to above-mentioned terminal oxidized mechanism: as cyclohexane, ring alcohol is generated by the hydroxylation of mixed-function oxidase, the latter's dehydrogenation generates ketone, be oxidized further again, an oxygen inserts ring and generates lactone, lactone open loop, the hydroxyl of one end is oxidized to aldehyde radical, be reoxidised into carboxyl, the dicarboxylic acid generated is by the further metabolism of β-oxidation: alicyclic compound can not be used as the sole carbon source of microorganism growth usually, unless they have sufficiently long aliphatic lateral chain.Although found the microorganism that can grow on cyclohexane, more commonly can transform cyclohexane has been that the microorganism of cyclohexanone can not lactonize and open loop, and cyclohexanone can be lactonized and the microorganism of open loop can not to transform cyclohexane be cyclohexanone.Intergrowth relation between visible microorganism and Co metabolism play an important role in the biological degradation of naphthenic hydrocarbon.Three, the microbiological deterioration of aromatic hydrocarbon: aromatic hydrocarbon is catechol by oxygenase oxidizes, and the aromatic nucleus of dihydroxy reoxidizes, ortho position or a position open loop.Ortho position open loop generates muconic acid, reoxidizes as β-one adipic acid, and the latter reoxidizes intermediate product succsinic acid into tricarboxylic acid cycle and acetyl-CoA.Between position open loop generate 2-hydroxyl hexadiene half aldehydic acid, further metabolism generates formic acid, acetaldehyde and pyruvic acid.Four, the microbiological deterioration of polycyclic aromatic hydrocarbons: the biological degradation of polycyclic aromatic hydrocarbons, ring dihydroxy, open loop, be degraded to pyruvic acid and CO further before this
2, then second ring decomposes in the same fashion.
The principle of micro-organism treatment process section is the bacterial classification utilizing occurring in nature can degrade to some organic pollutant in the oil extraction waste water of ternary composite driving oil field, carry out screening, tame, spread cultivation, then be added in the device of a constant volume, make its biofilm on suspension member filler, again sewage is passed into this device, the microorganism species in device just can be degraded to the organic pollutant in sewage.Bacterial classification dosage by volume, bacterial classification volume is ten thousand/2-5 of device body 1 volume, this technology can set up the biological group of effectively the degrade organic pollutants such as benzene class, hydro carbons, lipid, naphthalene class fast in sewage, effective biological degradation is carried out to the aliphatics and aromatic series etc. of complexity various in sewage, the biological degradation to hydro carbons, wax class and phenol, naphthalene, amine, benzene etc. can be strengthened simultaneously, energy is obtained for nutrition with dirty organic pollutants, realize the metabolism of its life, by the continuous breeding of population, realize ability of disposing of sewage continuously.This technology, except having the common feature of other biological treatment technology, also has the advantages such as anti-load height, sludge quantity are few, non-secondary pollution, the residence time is short, treatment effect is good.
The effect of micro-organism treatment process section is on the suspension type bio-carrier containing zymin, generate associating biological flora benzene class, aldehydes matter and heterocyclic arene type organic to special efficacy Degradation, thus the organic oil pollutants in water of decomposition, and under the adsorption filtration effect of bio-carrier, remove other suspended contaminant in water, suspended substance is that bulk comes off mycoderm form by molecule Morphological Transitions.Micro-organism treatment process section final stage adopts micro-aeration system, carries out solid-liquid separation to the mud that micro-organism treatment process section produces, and removes the mycoderm that comes off and wire suspended solids, finally makes that water outlet oil-containing is not more than 50 ㎎/L, suspended substance is not more than 150 ㎎/L.
Water through micro-organism treatment process section enters Advanced Oxidation Technics in Dealing section 3, Advanced Oxidation Technics in Dealing section 3 comprises air coarse filter 3-1 by pipeline successively joint noise reduction device 3-2, air compressor 3-3, air cooling driers 3-4, air fine filter 3-5, oxygenerator 3-6, reactive gas generating unit 3-7, catalytic oxidation tank 3-8, tail gas recycle device 3-9, wherein: tail gas recycle device 3-9 is provided with reactive gas on-line checkingi device 3-10, reactive gas generating unit 7 is connected with circulating water cooling system 3-11, catalytic oxidation tank 3-8 is provided with COD on-line monitoring device 3-12, COD on-line monitoring device 3-12 and reactive gas generating unit 3-7 is connected with PLC 3-13 signal wire respectively, the COD value of water is converted into electric signal transmission to PLC 3-13 by COD on-line monitoring device 3-12, after the controlling curve of COD value and storage is compared by PLC 3-13, adjust the power of reactive gas generating unit 3-7, make it to adapt with water water quality.
Catalytic oxidation tank 3-8 in Advanced Oxidation Technics in Dealing section 3 is vertical tank, adopt enterprising water outlet under water, water is at the tank deck water distribution of catalytic oxidation tank 3-8, underdrain, reactive gas adopts gas collection on lower gas distribution, tail gas through catalytic oxidation tank 3-8 reclaims at tank deck, and catalytic oxidation tank 3-8 inside is filled with polytetrafluoroethylene packing.The reactive gas reliever 3-14 material of catalytic oxidation tank 3-8 is porous honeycomb ceramic surface attachment metal oxide or rare metal sintering, wherein metal oxide Al
2o
3, TiO
2or MnO
2.Frequency 20 ~ 25kHZ, voltage 3kV ~ 6kV, the air pressure 0.3 ~ 0.6MPa of the reactive gas generating unit 3-7 that it uses.
The advanced oxidation principle of Advanced Oxidation Technics in Dealing section 3 foundation, with reactive gas and hydroxyl radical free radical for primary oxidizers and organism react, the organic free radical generated in reaction can continue the chain reaction participating in HO, or after generating organic peroxy free radical, further generation oxidative decomposition until be degraded to final product CO2 and H2O, thus reaches the organic object of oxygenolysis.Compared with the water treatment method that other are traditional, advanced oxidation processes has following characteristics: produce a large amount of very active its oxidation capacity of Hydroxyl radical HO (2.80v) and be only second to fluorine (2.87), it is as the intermediate product of reaction, chain reaction below can be brought out, hydroxyl radical free radical differs very little from the reaction rate constant of different organic substance, when there is multiple pollutant in water, there will not be the situation that a kind of material is degraded and another kind of material is substantially constant; HO cannot be degraded to carbonic acid gas, water and harmless object by the pollutant reaction selectively directly and in waste water, can not produce secondary pollution; General chemistry oxidation style due to oxidation capacity poor, react the reason such as selective, often directly can not reach the object that complete organics removal reduces TOC and COD, and substantially there is not this problem in advanced oxidation rule, intermediate product in oxidising process all can continue same hydroxyl radical reaction, until be finally oxidized to carbonic acid gas and water completely, thus reach the object thoroughly removing TOC, COD; Because it is a kind of physical and chemical process, be easy to be controlled, with satisfied process needs, compare with common chemical oxidization method, the speed of response of advanced oxidation processes is very fast, can reach processing requirements within very short time; Both can be used as individual curing, can match with other treating processess again.
The effect of Advanced Oxidation Technics in Dealing section 3 is to carry out depth degradation to the organic pollutant of remnants; Meanwhile, utilize oxygenizement, chain rupture is carried out to polymkeric substance in ternary sewage, thus effectively reduce former water viscosity, greatly reduce the difficulty of subsequent treatment process, utilize exhaust gas recovery system 8 to detect the content of reactive gas in tail gas simultaneously and reach the object of environmental protection.
Effective residence time of Advanced Oxidation Technics in Dealing section 3 is 30min ~ 60min.When water oil-containing be not more than 50 ㎎/L, suspended substance is not more than 150 ㎎/L, viscosity is not more than 15mPas time, water outlet oil-containing is not more than 10 ㎎/L, suspended substance is not more than 30 ㎎/L, viscosity is not more than 2mPas.
The removal process of advanced oxidation skill section 3 pairs of water pollutants: 1, be oxidized inorganics: 1. solubility Fe and Mn in water can be oxidized to ferric iron, tetravalent manganese generates precipitation and removes; 2. ammonia nitrogen is oxidized to NO lentamente by ozone
3, then removed through biological nitration and metabolism assimilation; When 3. there is bromide, ammonia can be degraded to N through ozone oxidation
2, Br is HOBr by ozone rapid oxidation simultaneously, and then forms N with ammonia react
2and Br, Br are again by ozone oxidation, until ammonia is all removed; 4. prussiate forms cyanate after ozone oxidation, the latter under acid or alkaline conditions all hydrolyzable be converted into nitride; 5. the oxidizable generation elemental sulfur of inorganic sulphide, and be further oxidized to SOx.2, oxidation of organic compounds: reactive gas can be oxidized many organism, as protein, amino acid, organic amine, chain unsaturated compound, aromatic series, xylogen, soil ulmin etc.Wherein reactive gas carries out for the following process of degraded Main Basis of polymkeric substance: PAM+.OH → intermediate product → degraded product, thus realizes the degraded to polymkeric substance.
Water after Advanced Oxidation Technics in Dealing section 3 processes enters filtration treatment process section 4, described filtration treatment process section 4 comprises two-stage filtration, wherein one-level is sandfiltration pot 9, secondary is fine filter 10, fine filter 10 is divided into upper cavity 4-2, lower chamber 4-4, and upper cavity 4-2 upper surface adopts fast-open type upper cover 4-1 to close, between upper cavity 4-2, lower chamber 4-4, be provided with dividing plate 4-3, dividing plate 4-3 installs multiple filter bag 4-8, and the treat surface load of filter bag 4-8 is 1.5m
3/ ㎡
2h, backwash intensity is 1L/s ㎡
2~ 2L/s ㎡
2, the backwash time is 3min ~ 5min.Filter bag 4-8 upper shed communicates with upper cavity 4-2, filter bag 4-8 adopts inner frame 4-9 and purchasing ore 4-7 to fix, inner frame 4-9 and purchasing ore 4-7 is fixed on dividing plate 4-3, lower chamber 4-4 bottom is connected with positive filter influent mouth 4-5, just leaching mouth of a river 4-6, positive filter influent mouth 4-5 extends inwardly through lower chamber 4-4 and is connected with upper cavity 4-2, positive filter influent mouth 4-5 and outside positive filter influent valve 4-13, backwash outlet valve 4-14 connects, just leach mouth of a river 4-6 and just leach water valve 4-12 with outside, backwash water intaking valve 4-11 connects, backwash water intaking valve 4-11 connects backwashing pump 4-10, positive filter influent valve 4-13, backwash outlet valve 4-14, just leaching water valve 4-12, backwash water intaking valve 4-11, backwashing pump 4-10 is connected 4-15 with controller signals respectively.
Filtration treatment process section 4 realizes purification of water quality by thick and smart two-stage filtration.In filtration treatment process section 4, one-level sandfiltration pot 9 is that filtering layer filters, and one-level sandfiltration pot 9 filtering velocity is 8m/h, and removed the fine suspension in water inlet by the hole of filtering layer, filtering layer is filtered into coarse filtration; Sandfiltration pot 9 adopts conventional pressure type deep-bed filtration mode, and filtrate grating adopts quartz sand, magnetite double-layer filter material, total thickness of filter bed 800mm.Its principle of work utilizes sewage by collision absorption crown_interception during filter bed, the pollutents such as the oil-containing in removal oily(waste)water and suspended solids, thus realize the purification function of sewage; Simultaneously by the selection to filtering material particle diameter grating, realize the control to water outlet suspended solids median particle size, ensure that final outflow water water quality is qualified.Effluent quality reaches that oil-containing is not more than 5 ㎎/L, suspension content is not more than 15 ㎎/L, median particle size is not more than 3 μm.In filtration treatment process section 4, secondary fine filter 10 is surface filtrations, is retained by the impurity that suspended impurity grain diameter in water is greater than hole aperture by micropore filter material, and surface filtration is essence filter.This equipment of the principle of work of fine filter 10 adopts modified fibre surface filtration mode, its principle of work utilizes sewage by absorption crown_interception during modified fibre filtering material, the pollutents such as the oil-containing in removal oily(waste)water and suspended solids, thus realize the purification function of sewage; Simultaneously by the selection to filtering material precision, realize the control to water outlet suspended solids median particle size, ensure that final outflow water water quality is qualified.The effect of fine filter 10 carries out depth type filtration process to the sewage after once filtering, the remaining sump oil of further removal and suspended solids, and water outlet suspended solids median particle size is control effectively, effluent quality reaches that oil-containing is not more than 5 ㎎/L, suspension content is not more than 5 ㎎/L, median particle size is not more than 2 μm.Fine filter 10 adopts to purify waste water and carries out backwash, adopts reverse back flushing.Purify waste water by after backwash water pump lifting, enter from filtering layer bottom water outlet, filtering layer fluidisation is expanded, and rinses, thus realize filtering layer and regenerate reusable object.
Sludge treating system 6 comprises sludge concentrating pot 14, the water outlet pipeline that sludge concentrating pot 14 top connects is connected with the water inlet pipe of micro-organism treatment process section 2, sludge concentrating pot 14 bottom goes out mud pipeline and is connected with the inlet end of centrifuge 11, the exit end of centrifuge 11 is connected with the inlet end of worm conveyor 12, and the water outlet pipeline going out mud pipeline and top connection of sludge concentrating pot 14 bottom connection is separately installed with recovered water pump 13.Moisture percentage in sewage sludge after sludge treating system 6 mummification processed is less than 75%, and oil-containing is less than 2%.Mud produces primarily of micro-organism treatment process section 2, after organism in water is decomposed by flora, be converted into constitute and the energy of bacterial growth breeding, in the metabolic processes of flora, aging mycoderm can substitute by newborn mycoderm, aging mycoderm, under the souring of aerating system aeration, comes off and enters water body, its main composition is: aging mycoderm and various suspended substance of not degrading in the water be attached on mycoderm, its bulk & form is relatively large.Micro-organism treatment process section 2 finally adopts micro-aeration mode, carries out solid-liquid separation to the mud that biological purification system produces.Under flotation effect, in water, the mycoderm of bulk is easy to emerge under the drive of device interior ascending gas bubbles, forms scum silica frost, and is collected in storage mud tank through scraping slag system.Eventually with cement slurry utilizes sludge treating system 6 to carry out dehydration and drying process.The principle of sludge treating system 6 is, first the mud that micro-organism treatment process section 2 is discharged is concentrated, recycling centrifuge 11 pairs of mud carry out mummification dehydration, moisture percentage in sewage sludge after mummification dehydration is less than 75%, oil-containing is less than 2%, finally be promoted to loading height by worm conveyor 12, meet the condition of outward transport.
Claims (3)
1. a ternary composite driving oil field oil extraction waste water advanced treatment apparatus, it is characterized in that: this device is divided into air-flotation process process section (1), micro-organism treatment process section (2), Advanced Oxidation Technics in Dealing section (3), filtration treatment process section (4), and micro-organism treatment process section (2) is equipped with sludge treating system (6);
Described air-flotation process process section (1) is divided into zone of action (1-1), disengaging zone (1-2), exhalant region (1-3), Shou You district (1-4), zone of action (1-1) is connected with water distributor (1-5), water distributor (1-5) is provided with viscosity on-line checkingi device (1-19), dissolved air release (1-6) is installed in zone of action (1-1), the inlet end of dissolved air release (1-6) is communicated with pressure regulator valve (1-21) and dissolving (1-12) successively, the inlet end of dissolving (1-12) connects dissolved air water pump (1-13) and air compressor (1-14) respectively, the water pipeline that dissolved air water pump (1-13) inlet end connects communicates with exhalant region (1-3), zone of action (1-1) and disengaging zone (1-2) are separated by dividing plate (1-7), dividing plate (1-7) upper surface bends to disengaging zone (1-2) direction, Oil scraper (1-10) is installed in Shou You district (1-4), Oil scraper (1-10) is driven by electric motor (1-11), sump oil in Shou You district (1-4) is scraped into collection tank (1-9), collection tank (1-9) is communicated with fuel reserve tank (1-16), the exit end of fuel reserve tank (1-16) connects the inlet end receiving oil pump (1-17), water tank (1-15) is provided with in exhalant region (1-3), water tank (1-15) is communicated with header (1-8), the inlet end of header (1-8) is positioned at zone of action (1-1) bottom,
Described micro-organism treatment process section (2) comprises device body (2-1), device body (2-1) is divided into one ~ level Four breaking milk and removing oil district and solid-liquid separator (2-12), solid-liquid separator (2-12) is made up of the settling section (2-9) of fore portion and the gas-solution water generator of rear section, in every one-level breaking milk and removing oil district, stuffing box support (2-5) is installed, modular combination stuffing box (2-4) is installed in stuffing box support (2-5), every one-level breaking milk and removing oil district inner sidewall upper portion is provided with effluent weir (2-7), effluent weir (2-7) is communicated with water distributor (2-8), water distributor (2-8) also communicates with next stage breaking milk and removing oil district through breaking milk and removing oil district sidewall to downward-extension, aerating system (2-2) is installed in device body (2-1), aerating system (2-2) is by Aeration fan (2-13), aeration pipeline, aeration head (2-3) forms, device body (2-1) internal upper part is provided with scrapes oil system, scrape oil system by Oil scraper (2-10), collection tank (2-11) forms,
Described Advanced Oxidation Technics in Dealing section (3) comprises air coarse filter (3-1), air coarse filter (3-1) is by pipeline successively joint noise reduction device (3-2), air compressor (3-3), air cooling driers (3-4), air fine filter (3-5), oxygenerator (3-6), reactive gas generating unit (3-7), catalytic oxidation tank (3-8), tail gas recycle device (3-9), wherein: tail gas recycle device (3-9) is provided with reactive gas on-line checkingi device (3-10), reactive gas generating unit (3-7) is connected with circulating water cooling system (3-11), catalytic oxidation tank (3-8) is provided with COD on-line monitoring device (3-12), COD on-line monitoring device (3-12) and reactive gas generating unit (3-7) are connected with PLC (3-13) signal wire respectively, the COD value of water is converted into electric signal transmission to PLC (3-13) by COD on-line monitoring device (3-12), after the controlling curve of COD value and storage is compared by PLC (3-13), adjust the power of reactive gas generating unit (3-7), make it to adapt with water water quality,
Described filtration treatment process section (4) comprises two-stage filtration, wherein one-level is sandfiltration pot (9), secondary is fine filter (10), fine filter (10) is divided into upper cavity (4-2), lower chamber (4-4), upper cavity (4-2) upper surface adopts fast-open type upper cover (4-1) to close, at upper cavity (4-2), dividing plate (4-3) is installed between lower chamber (4-4), at dividing plate (4-3) the multiple filter bag of upper installation (4-8), filter bag (4-8) upper shed communicates with upper cavity (4-2), filter bag (4-8) adopts inner frame (4-9) and purchasing ore (4-7) to fix, inner frame (4-9) and purchasing ore (4-7) are fixed on dividing plate (4-3), lower chamber (4-4) bottom is connected with positive filter influent mouth (4-5), just leaching the mouth of a river (4-6), positive filter influent mouth (4-5) extends inwardly through lower chamber (4-4) and is connected with upper cavity (4-2), positive filter influent mouth (4-5) and outside positive filter influent valve (4-13), backwash outlet valve (4-14) connects, just leach the mouth of a river (4-6) and just leach water valve (4-12) with outside, backwash water intaking valve (4-11) connects, backwash water intaking valve (4-11) connects backwashing pump (4-10), positive filter influent valve (4-13), backwash outlet valve (4-14), just leaching water valve (4-12), backwash water intaking valve (4-11), backwashing pump (4-10) is connected with controller signals (4-15) respectively.
2. ternary composite driving oil field according to claim 1 oil extraction waste water advanced treatment apparatus, it is characterized in that: sludge treating system (6) comprises sludge concentrating pot (14), the water outlet pipeline that sludge concentrating pot (14) top connects is connected with the water inlet pipe of micro-organism treatment process section (2), sludge concentrating pot (14) bottom goes out mud pipeline and is connected with the inlet end of centrifuge (11), the exit end of centrifuge (11) is connected with the inlet end of worm conveyor (12), the water outlet pipeline going out mud pipeline and top connection of sludge concentrating pot (14) bottom connection is separately installed with recovered water pump (13).
3. a kind of ternary composite driving oil field according to claim 1 oil extraction waste water advanced treatment apparatus; it is characterized in that: master control system of the present invention adopts DCS distributed control system; each process section all has independently PLC; all PLC, completing while this process section controls automatically, realize centralized displaying and comprehensive coordinate by DCS distributed control system; The automatic control content of each process section comprises:
1. air-flotation process process section (1) is by viscosity on-line monitoring system, the viscosity of Real-Time Monitoring water, PLC control system Real-time Collection viscosity, on-line monitoring system viscosity signal, and according to water viscosity B coefficent situation, the aperture of automatic pressure regulation variable valve and the frequency-variable controller of dissolved air water pump, real-time regulable control is carried out to the pressure of device dissolved air water and flow, thus realizes bubble diameter size adjustment, control reflux ratio simultaneously;
2. micro-organism treatment process section (2) is the related data being gathered water by COD on-line monitoring system and viscosity on-line detecting system, viscosity stored in PLC comparable data storehouse and COD data are compared, determine Aeration fan aeration rate, PLC, realizes automatically regulating the real-time online of aeration rate in device body by controlling the frequency-variable controller of Aeration fan by this aeration rate;
3. Advanced Oxidation Technics in Dealing section (3) is, by COD on-line monitoring system, the COD value of water is converted into electric signal transmission to PLC, after the controlling curve of COD value and storage is compared by PLC, adjust the power of reactive gas generation systems (7), make it to adapt with water water quality.
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| CN105236571A (en) * | 2015-10-26 | 2016-01-13 | 中国石油天然气股份有限公司 | Method for processing alkaline-surfactant-polymer flooding produced water through BESI biological technology |
| CN106396301B (en) * | 2016-12-13 | 2023-02-03 | 大庆市海油庆石油科技有限公司 | Oil field sewage station adds little biological treatment device |
| CN106837219B (en) * | 2017-03-14 | 2023-03-31 | 中国石油天然气集团有限公司 | Test well returns row gas-liquid and filters noise elimination integrated device |
| CN108771888B (en) * | 2018-06-08 | 2020-09-29 | 中石化石油机械股份有限公司研究院 | Modular backflow liquid sedimentation and separation solid device |
| CN109293142A (en) * | 2018-10-19 | 2019-02-01 | 中国石油天然气股份有限公司 | A kind of high sulfur-bearing oilfield produced water deep treatment equipment and technique |
| CN110987053B (en) * | 2019-11-26 | 2021-07-16 | 大庆油田有限责任公司 | Device and method for evaluating treatment mode of CO2 flooding produced water |
| CN111268860A (en) * | 2020-02-05 | 2020-06-12 | 大庆市海油庆石油科技有限公司 | Salt-resistant polymer-containing oily sewage treatment process |
| CN111792809A (en) * | 2020-07-03 | 2020-10-20 | 中国石油天然气集团有限公司 | Oil-containing sludge advanced treatment process and treatment equipment |
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