CN101654150B - Method for separating and processing marine oily water and processing device thereof - Google Patents

Method for separating and processing marine oily water and processing device thereof Download PDF

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Publication number
CN101654150B
CN101654150B CN2009100349948A CN200910034994A CN101654150B CN 101654150 B CN101654150 B CN 101654150B CN 2009100349948 A CN2009100349948 A CN 2009100349948A CN 200910034994 A CN200910034994 A CN 200910034994A CN 101654150 B CN101654150 B CN 101654150B
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water
oily water
oily
oil
disconnector
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CN101654150A (en
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陈海兵
梅冬兴
蔡晓幸
马如中
何丽君
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DONGTAI CITY DONG FANG MARINE FITTING Co Ltd
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DONGTAI CITY DONG FANG MARINE FITTING Co Ltd
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Priority to PCT/CN2010/076650 priority patent/WO2011032464A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J4/00—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for
    • B63J4/004—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for for treating sludge, e.g. tank washing sludge

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  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
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  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a method for separating and processing marine oily water and a processing device thereof. The method comprises the following steps: preheating treatment is carried out on bilge oily water to 48-58 DEG C; oil drop aggregation and oil-water gravity separation are carried out to separate out waste oil and separate water; the separated water is filtered into filtered water by a filter-material filter device and then is sent to a separation process device; concentrated solution is recovered; and infiltration water is discharged outside cabin. The device for processing marine oily water of the invention comprises a heater, a gravity separator, a suction pump, a filter-material filter and a membrane processor communicated sequentially; the oily water inlet of the heater is connected to a bilge oily water station; and the infiltration water outlet of the membrane processor is communicated with a sea valve by a puff pipe. The invention not only can realize separation process of high-density residuum oily water, but also can realize effective separation process of emulsion in oily water, so as to meet strict emission standard, thereby being widely used in separation process of bilge oily water.

Description

Method for separating and processing marine oily water and processing equipment thereof
Technical field
The present invention relates to the oily water processing technology field, particularly a kind of method for separating and processing of bilge oily water peculiar to vessel.The invention still further relates to a kind of oil and water treatment equipment that adopts this oily water method for separating and processing.
Background technology
Along with the fast development of world shipping cause, the increasing sharply of tonneaux de jauge, the improper discharging of boats and ships bilge oily water has become the main form that boats and ships cause marine pollution.After the boats and ships oily water enters ocean water body, form one deck oil film as thin as a wafer,,, can form 5 * 10 to 1 ton of oil product of water surface discharging according to analysis in water surface 6m 2Oil film pollute, the oxygen that this oil film directly hinders in the atmosphere shifts in water body, makes water hypoxia, aquatic organism is dead because of anoxic; Oil product also has certain toxicity, and is particularly outstanding to the influence of juvenile fish and fish-egg, in addition, but a large amount of oil films even fire hazard and influence waterborne traffic.Boats and ships bilge oily water discharges to sea environment-friendly and has brought huge threat.
For this reason; International Maritime Organization (IMO) and national governments have put into effect a series of maritime affairs laws and regulations in succession; to reduce the Pollution From Ships problem to greatest extent; Maritime Environment Protection Committee of International Maritime Organization (IMO) has also expanded boats and ships to all marine sites in the regulation that oleaginousness coastal and Special Areas discharging bilge water is no more than 15ppm, and the marine oily water processing equipment has become the boats and ships blowdown treatment facility that mandatory carriage is carried out.MEPC.107 (49) resolution that International Maritime Organization (IMO) passed through on July 18th, 2003 has proposed more strict standard to 15ppm bilge oily water separator and annunciator, with separating treatment heavy oil density 940kg/m 3Be promoted to 980kg/m 3More than, and increased processing requirements to oil emulsion; It is a great problem of oily water process field that the oily water that the oily water that contains oil emulsion particularly contains the chemical emulsification oil of inhibiter separates always, so relevant laws and regulations before this and effluent standard all do not propose the test requirements document of the processing requirements and the processing equipment of oil emulsion.
Existing oily water method for separating and processing and processing equipment thereof mostly adopt gravity separation to handle the oil droplet collector of adding mechanical-like, and this class separating and treating apparatus is to carry out oil separation according to oil with different and gathering, the adsorption of water proportion.But density is at 980kg/m 3The above density of residual oil own is higher, the existence of some pollutantss (as iron rust) in addition, oil droplet has often adsorbed some iron rust, make that the density contrast of residual oil and water is minimum, or surpass the density of water, and its viscosity is very high, makes that assembling the difficulty of separating the oil droplet come-up strengthens, even can't realize separating by traditional gravity methods.More because MEPC.107 (49) resolution has increased the separation requirement of disengagement gear to the oily water that contains oil emulsion, oily impurity in the oil emulsion is long-term suspension and is uniformly distributed in the water, have the stability of height and can not assemble come-up, relying on traditional gravity separation method undoubtedly is to realize that the oily water that contains emulsion separates.
Though on the basis of the oil droplet polymerizer of people by adding mechanical-like in gravity separation, separate by membrane filtration again, this in theory separation method can be realized the separating treatment of oil emulsion, yet because separating film is in holding back the process of oil emulsion, being trapped thing produces the gel layer that thin layer covers and causes the pollution of separating film in the lip-deep accumulation of film meeting on film surface, even more serious is because separating film has lipophilic usually, in the separation process because the thorough oil droplet in the separating oil sewage of preceding stage treatment method, solids and water, in the membrance separation process, flowing fast of liquid makes oil droplet and solid impurities enter into fine and close pore very soon, the inside that causes film is stopped up, and the pollution on film surface and the obstruction of fenestra make hydrone to pass fine and close micropore and to enter the opposite side of film in the side pressure effect.Test shows, tangible decline promptly appears in the processing equipment of this structure membrane flux in short several weeks even several days, and prolongation along with the time, membrane flux generally can descend at double, have to from disengagement gear to take out separating film cleans or upgrades separating film for this reason, this has not only significantly increased the operating cost of disengagement gear, and under the very limited condition in boats and ships space, also is very difficult.
Because in the existing oily water separating and treating apparatus, be subjected to the limitation of its gravity separation stage isolating construction and separation method, can not separate and contain the higher residual oil sewage of density, can not more efficiently eliminate oil droplet composition and solid impurities in the oily water again, and increase the weight of the burden of phase separating membrane, and causing the very fast inefficacy of membrance separation, pining down mutually on each separation phase function of separating and treating apparatus appears, can not respectively take charge of its duty, finally cause the whole device can't normal operation.
Summary of the invention
At the above-mentioned deficiency of existing in prior technology, technical matters to be solved by this invention provides a kind of method for separating and processing marine oily water, this method not only can realize the separating treatment of high density residual oil oily water, and can realize the emulsion in the oily water is carried out effective separating treatment, make it to satisfy strict emission control standards.
Another technical matters that will solve of the present invention is that a kind of oil and water treatment equipment of realizing this oily water method for separating and processing also will be provided.
In order to solve the problems of the technologies described above, method for separating and processing marine oily water of the present invention may further comprise the steps: at first bilge oily water is preheated processing, it is preheated to 48 ℃～58 ℃; Oily water after again this being preheated is delivered to gravitational separation device, make oily water flow through several layers oily water runner in this gravitational separation device, carry out that oil droplet is assembled and the profit gravity separation and isolate waste oil and branch dried up, wherein said oily water runner by the adjacent corrugations withdrawal plate with interlaced stacked the forming of its ripple peak valley; The oily water runner maximum height of this gravitational separation device is 9mm～25mm, and the hydraulic detention time of oily water in gravitational separation device is 15min～25min; Waste oil after gravitational separation device separates is discharged, and divides dried uply then to be delivered to the media filtration device through delivery duct again; Dividing dried up hydraulic detention time in described media filtration device is 0.4min～2min, and filter material surface flow velocity load is 3mm 3/ mm 2.s～4mm 3/ mm 2.s; When the filtered water after the media filtration device filters satisfies effluent standard, it is disposed to outboard, otherwise the filtered water after this filtration is transported to the membrance separation processing equipment through delivery duct, simultaneously, partial concentration liquid in the membrance separation processing equipment is continued to send back to bilge greasy dirt water station, and this partial concentration liquid is 15%～25% of membrance separation processing equipment process load, and remaining concentrate reclaims, in addition, discharge out of my cabin through the seepage water of membrance separation processing equipment.
Adopts above-mentioned oily water method for separating and processing,, thereby increased density contrast between oil, the water, and residual oil viscosity descends at first because bilge oily water is preheated processing, help heavy oil especially density at 980kg/m 3Above residual oil oil droplet is assembled the come-up separation in oily water, and isolated waste oil is also easier discharges from the oil-collecting position; Certain too high oily Wen Jihui makes oil become rare, and emulsification easily, also can consume too much heat energy, therefore, the contriver is through analyzing repeatedly and actual tests, and pre-heating temperature is controlled between 48 ℃～58 ℃, have desirable separating effect and comprehensive benefit, can realize density is surpassed 1000kg/m 3The separation of residual oil.
Second, has the runner gravity separation method of multilayer oily water runner owing to adopt, increased the area coverage of oil-water interface and the flow channel length of oily water greatly, the gathering that not only helps oil droplet increases and quickens floats, and more helps the collision gathering of tiny oil droplets.Adopt reasonable flow channel height dimension and hydraulic detention time simultaneously, guaranteed effectively that also disengagement gear works continuously and stably.Though too small runner height can have bigger specific surface area under a constant volume condition, but be easy to form oil droplet and the obstruction of bubble in passage, the work efficiency of whole disengagement gear is descended, excessive runner height dimension can take excessive space again, and separation efficiency is descended, be unfavorable for saving limited cabin space, same hydraulic detention time also directly affects the work effect and the separation efficiency of disengagement gear, and oily water runner peak height is controlled at 9mm-25mm, hydraulic detention time is controlled at has desirable total score from treatment effect between the 15min-25min.
The 3rd; because employing media filtration device is not only further removed the oil content in the oily water; what is more important is removed the suspended solids such as ferric oxide in the oily water; this media filtration device is arranged at the preceding road of membrane treatment appts, has protected separating film not polluted and disablement preferably by solids and oil droplet with physical method.Hydraulic detention time in the media filtration device is controlled between 0.4min～2min, and filter material surface flow velocity load is designed to 3mm 3/ mm 2.s～4mm 3/ mm 2.s (at the per second filtered water cu.mm. number that every square millimeter filter material surface passes through in the time), thus make it to have higher filtration treatment efficient and processing capacity.
The 4th, owing to adopt efficient separation, the filtration in preceding road, separating film is only filtered divisional processing to oil emulsion and dissolved oil.Separating film has desirable separating treatment effect to oil emulsion, but it stops up by oil droplet and suspended solids thereof again easily, so one aspect of the present invention is by having the gravity separation method of multilayer oily water runner, makes the oil content of branch in dried up near 15ppm; This branch is dried up further removes suspended solid impurities and oil content through the physical filtering of filtrate again, thereby carries out early-stage preparations for membrance separation filters oil emulsion.
The 5th, the method for employing concentrate partial reflux in membrance separation is avoided the dead end operation of separating film.Take all factors into consideration the cleaning and the film treatment effeciency on film surface, and the concentrate of membrance separation processing equipment 15%～25% process load is continued to send back to bilge greasy dirt water station, allow oily water be parallel to the film surface flow with certain speed, with the formation of washing away shearing force inhibition film surface contaminant gel layer that phegma was produced, the concentration polarization of block film release surface.
In separating treatment process of the present invention, gravitational separation device has been realized separating of oil droplet and moisture in the oily water well, the media filtration device again elimination solid impurities, last membrane treatment appts is only held back completely with dissolved oil oil emulsion and is separated, realized the conversion of oily water → minute dried up → filtered water → seepage water, each operation " its duty clearly, is respectively taken charge of in the division of labor ", harmonious orderly ground guarantees the separating treatment effect of oily water.
A kind of preferred implementation of the present invention, the membrane module in the described membrance separation processing equipment adopts the external-compression type hyperfiltration membrane assembly, and sends the concentrate of 18%～22% process load back to bilge greasy dirt water station.Adopt external-compression type ultrafiltration structure, be convenient to filter membrane outside face pollutants is carried out clean; Adopt the concentrate of this process load to send the process of bilge greasy dirt water station back to, have more high separating efficiency and significantly preventing polluting effect.
In order to realize method for separating and processing marine oily water of the present invention, marine oily water processing equipment of the present invention, comprise temperature booster, gravity separator, aspirating pump, filtering material filter and film treater, described temperature booster, gravity separator, aspirating pump, filtering material filter and film treater are connected in regular turn by pipeline; The oily water of described temperature booster feeds mouth and connects to bilge greasy dirt water station, and the outlet of the seepage water of described film treater is connected with sea valve; Described aspirating pump is positioned on the pipeline that is communicated with gravity separator and filtering material filter; In the oily water entrance of described film treater also and be connected with the gas backwash valve.
Oil and water treatment equipment of the present invention, after adopting said structure, because temperature booster, gravity separator, aspirating pump, filtering material filter and film treater are communicated with arrangement in regular turn, this structure is by solving the problem that high density residual oil is difficult to separating treatment to preheating of oily water, preheat the back oily water and enter into multilayer oily water runner again with the mutual wrong folded formation of some ripple withdrawal plates, oil droplet is gathered in the oily water runner increase the come-up separation, the oil separation time is more abundant, and oil droplet is assembled, the come-up effect is desirable more; Aspirating pump is arranged at the downstream end of gravity separator, has effectively avoided disturbance and the emulsification of aspirating pump to oily water; Branch after separating is dried up again through the physical filtering of filtering material filter and elimination suspension solid impurity and remaining oil content, and this performs sufficient preparation for separating film to the further separation of oil emulsion again; And the film treater carries out the actv. isolated by filtration to oil emulsion, and this film treater can be in use cleans carrying out the air-flow recoil immediately, has stablized the use flux of membrane module.So in processing equipment of the present invention, the process equipment of each step is arranged rationally, function is auxilliary mutually, coordinates effectively the oily water that contains higher density residual oil, suspended solid impurities and emulsion to be carried out efficient separating treatment.
A kind of preferred implementation of the present invention, described temperature booster comprises the temperature booster housing, this temperature booster housing is provided with oily water access tube and heated oil bilge discharge pipe; Oily water access tube and heated oil bilge discharge pipe are connected with temperature booster housing tube chamber; Described temperature booster housing tube is provided with steam heating pipe in the chamber, and these steam heating pipe two ends are led to steam access tube and vapour-discharge tube respectively.
In the said structure, owing in preheater shell tube chamber, be provided with steam heating pipe, when feeding the oily water of processing to be separated in the preheater shell tube chamber, the water vapour of steam heating pipe of flowing through heats the oily water that surrounds around its tube wall by the heating tube wall, oily water temperature in the preheater shell tube chamber is risen, density reduces, viscosity descends, thereby strengthened the density contrast of sump oil and water, guarantee that oily water can efficiently separate in gravitational separation device, this reaches 980kg/m to partition density 3Above residual oil seems effective especially, has fundamentally solved existing greasy dirt gravitational separation device and can't separate the oily water separating treatment problem that contains residual oil.More because the steam heating pipe that is positioned at temperature booster housing tube chamber is to pass to saturated vapor as the heating medium of oily water, this has just made full use of the high physical property of water vapour heat absorption capacity, can realize the heating that is rapidly heated at short notice to oily water, make it melt come-up fast, accelerate the velocity of separation of oily water, thoroughly overcome the defective of Electric heating intensification wretched insufficiency in the existing oily water separation.Because large ship always is furnished with the water vapour boiler, the serious limited deficiency of electro heat electricity consumption can not appear in the steam source abundance yet simultaneously.
Another preferred implementation of the present invention, described gravity separator comprises cylindrical shell, and be arranged at oily water import, the waste oil discharge side on the cylindrical shell and separate water outlet, in described cylindrical shell, be provided with first at least and assemble the disconnector and the second gathering disconnector, this first gathering disconnector and second is assembled the upper and lower both sides that disconnector lays respectively at the water conservancy diversion orifice plate, be fixedly installed on the inwall of cylindrical shell, the midway location of water conservancy diversion orifice plate is provided with the water conservancy diversion through hole border seal of this water conservancy diversion orifice plate; Described first top of assembling disconnector is provided with top blind flange, leaves the gap between the periphery of this top blind flange and cylinder inboard wall; Described second bottom of assembling disconnector is provided with the water conservancy diversion blind plate, leaves the gap between the periphery of this water conservancy diversion blind plate and the inwall of cylindrical shell; The first gathering disconnector and/or second is assembled disconnector and is comprised some stacked ripple withdrawal plates mutually, this ripple withdrawal plate is the awl plate-like and card is a corrugated surface, the adjacent corrugations withdrawal plate interlaces folded and formation oily water runner radially with its ripple peak valley, and the maximum height of this oily water runner is 9mm～25mm.
Above-mentioned gathering disconnector is owing to be by being wrong mutually folded the forming of the ripple withdrawal plate of boring disk-like structure, card with withdrawal plate of card cone angle all is incline structure in 360 ° gyratory directions, even under Ship Swaying bevelled situation, oily water between withdrawal plate keeps the following current state at least on certain orientation, make boats and ships that the inclination of any direction take place, this oily water separator is always keeping normally, the continuous working situation, and the boats and ships oily water under any circumstance can be in the efficient separation.The incline structure that separates card simultaneously, dexterously existing advection sedimentation isolating construction is changed over the swash plate isolating construction again, the applicant is through the repetition test contrast, the separating effect of the more common flat flow isolating construction of this structure has had and has increased exponentially, and the separation removal effect to the property oil droplet that looses is more remarkable especially; This stepped construction has been used the shallow pool theory principle again well, under the situation of cylindrical shell constancy of volume, makes the separating treatment effect of disconnector improve the multiple of stacked ripple awl dish number.Again because the awl card of withdrawal plate is wave structure, the conical surface ripple peak valley of adjacent withdrawal plate is interlaced stacked and form the oily water split tunnel, this split tunnel radially has different sectional areas, thereby constitute the change spacing of ripple plate, become the current streamline, become the split tunnel structure of discharge flow cross section, the greasy dirt current are diffusion in this passage, contraction state and the alternating current movable property has been given birth to the sinuous pulsation current, increased in the oily water between the oil droplet collision probability greatly, impel small and scattered oil droplet to assemble and become big, accelerate the ascent rate of oil droplet, promoted the separating effect of oily water.Also owing to adopted many groups of structures of assembling the adjacent setting of disconnector, make the oily water in disconnector to flow to another group gathering disconnector pivotally from one group of gathering disconnector complications, the length of having extended the oily water split tunnel greatly so on the one hand, fundamentally solved the narrow and small and defective of the split tunnel curtailment that brings in boats and ships spaces, can maximally utilise the vacant space of boats and ships, can guarantee the oil-water separation of disconnector again, guarantee the efficient operation of marine separator; This on the other hand structure is when separating flow tract extends length, also increased the area coverage of disconnector oil-water interface greatly, make that the oil separation time is more abundant, oil droplet is assembled, the come-up effect is desirable more, more on the one hand, and the formed tortuous oil separation runner of this structure, further increased the effect that the oil droplet collision is assembled again, more effectively promote oil droplet and close and grow up quicken come-up and separate, so this structure to have very good oil-water separation.Maximum height owing to the oily water runner is designed to 9mm～25mm again, and each ripple withdrawal plate is interlaced stacked with the ripple peak valley of its card, thereby at the peak-to-peak formation of the opposed paddy oily water split tunnel radially that staggers mutually; Though too small channel height can have bigger specific surface area under a constant volume condition, be easy to form oil droplet and the obstruction of bubble in passage, the work efficiency of whole disengagement gear is descended; Excessive channel height size can take excessive space again, and separation efficiency is descended, and is unfavorable for saving limited cabin space, simultaneously owing to the height of this oily water passage along circumferential (channel width direction) changes to zero from zero to maximum again.The maximum height of this oily water runner is controlled to be in 9mm～25mm scope has desirable total score from treatment effect.The undulatory awl dish of this employing simultaneously isolating construction has not only carried out great breakthrough in design concept, is specially adapted in the oily water separating installation of boats and ships, and has characteristics simple in structure, that making is easy to maintenance.
Another preferred implementation of the present invention, described film treater comprises membrane module, and this membrane module is arranged in the metal cylinder, and the upper/lower terminal of metal cylinder is fixedly connected with end cover and overhead guard respectively; At least be provided with two membrane module concentrated solution outlets at the same end of described membrane module, this membrane module concentrated solution outlet is connected with the concentrate outlet.
Said structure is because the utilization membrane module carries out oil separation, and the oil-water emulsion, dispersed oil or the dissolved oil that make gravity separation to handle are able to effective separation, the separation efficiency height, energy consumption is low, and do not have phase transformation, non-secondary pollution in the separation process, membrane module structure is simple, and separation process is short.Again owing to be provided with two membrane module concentrated solution outlets at least in that membrane module is distolateral, when oppositely filter membrane being washed by a plurality of membrane module concentrated solution outlets, sparge water or pressurized air or purging medium can carry out actv. to filter membrane from all directions uniformity ground and clean, cleanup action is reliable and stable, effectively eliminated " the cleaning dead angle " of filter membrane, clean not only convenient and swift, and it is thoroughly clean more, make filter membrane can keep long-term steady-working state, thereby breakthrough the solution taken out the cleaning difficulty, the problem that replacement cost is high, show by repetition test, this on-line cleaning method can make and extend to the service life of filter membrane more than 8 years, reduces the over-the-road expense of separating and treating apparatus greatly.Also owing to membrane module is set in metal cylinder and end cover and the overhead guard; this structure has realized the effective protection to membrane module; make membrane module can high aboard ship chronically humiture, vibration, inclination reliable operation under the harsh environment such as wave; thoroughly avoided the distortion of membrane module; crackings etc. damage the generation of phenomenon; also avoid because of the burning of fire membrane module produces problems such as noxious gas, safe in utilization, the life-span is long.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is the flowage structure sketch of a kind of specific embodiment of the present invention;
Fig. 2 is the structural representation of temperature booster in the structure shown in Figure 1;
Fig. 3 is the structural representation of a kind of gravity separator in the structure shown in Figure 1;
Fig. 4 is a main apparent direction structural representation of assembling disconnector in the gravity separator shown in Figure 3;
Fig. 5 is the main apparent direction structural representation of ripple withdrawal plate in the gathering disconnector shown in Figure 4;
Fig. 6 be ripple withdrawal plate shown in Figure 5 overlook the direction structure scheme drawing;
Fig. 7 is the structural representation of another kind of gravity separator in the structure shown in Figure 1;
Fig. 8 is the structural representation of film treater in the structure shown in Figure 1;
Fig. 9 is the structure enlarged diagram of local A in the structure shown in Figure 8;
Figure 10 is the structural representation of membrane module in the structure shown in Figure 8;
Figure 11 is the flowage structure sketch of the another kind of specific embodiment of the present invention.
The specific embodiment
As shown in Figure 1, the marine oily water processing equipment comprises temperature booster 1, gravity separator 2, aspirating pump 3, filtering material filter 5 and the film treater 6 that links to each other in regular turn by pipeline; The filtered water outlet of this filtering material filter 5 is connected with film treater 6 filtered water inlet 608 and sea valve 10 connected with each other.Under the effect of aspirating pump 3, the oily water in the bilge greasy dirt water station 23 enters into temperature booster 1 through oily water transfer valve 26, and screw pump is adopted in aspirating pump 3; Saturated vapor is to preheating by the oily water in the temperature booster 1 to 48 ℃～58 ℃, and preferably pre-heating temperature is controlled between 52 ℃～56 ℃.Oily water after preheating continues to be sucked up in the gravity separator 2, and the top of this gravity separator 2 is the standing separation chamber with circular arch type top cover, then is provided with in the tube chamber, bottom to assemble the folded dish of the formed ripple of disconnector oily water runner disengagement chamber.The waste oil that separates through gravity separator 2 is discharged into the waste oil pool 24 by waste oil blowoff valve 25 from its arch top cover portion, also has gravity separator backwash tube 21 and foul valve 22 on the gravity separator 2; The hydraulic detention time of oily water in gravity separator 2 is 15min～25min, is preferably between 18min～22min and selects; Branch after gravity separator 2 separates is dried up to enter filtering material filter 5 by the dried up discharge-service valve 20 of the branch on the delivery duct, aspirating pump 3 and first sieve plate 4, and this is sieve plate 4 employing 30 orders～45 purpose web plate or orifice plates just.Filtering material filter 5 adopts common filter element filtering device, and its filter core sorbing material is Polymer fibers such as mekralon among the embodiment, and its filter element filtering aperture is 30 μ m, and this material for core can also be common used materials such as timber, active carbon certainly.Consider the actual filtration efficient and the filter effect of filtering material filter 5, the hydraulic detention time of filtering material filter 5 should be between 0.4min～2min, and filter material surface flow velocity load should be designed to 3mm 3/ mm 2.s～4mm 3/ mm 2.s (at the per second filtered water cu.mm. number that every square millimeter filter material surface passes through in the time).During allow compliance with emission standards, filtered water then drains into outboard through filter blowoff valve II 19, anti-siphonage pipe 9 and sea valve 10 to filtered water after filtering through filtering material filter 5.When the discontented sufficient effluent standard of filtered water still contained oil emulsion and dissolving wet goods suspension oil, filter blowoff valve II 19 closed, and divided the filtered water inlet 608 of the dried up blowoff valve of device after filtration I 18, film treater 6 to enter film treater 6.Seepage water after membrance separation is handled drains into outboard through infiltration water valve 7, boiler check valve 8, anti-siphonage pipe 9 and sea valve 10 again.Membrane module in the membrance separation processing equipment adopts the external-compression type hyperfiltration membrane assembly.
In the filter divisional processing process of film treater 6, always there is the concentrate of process load 15%-25% to be sent back in the bilge bilge greasy dirt water station 23 through reflux valve 11; The concentrate of sending bilge greasy dirt water station back to through repetition test be controlled at process load 18%～22% between have better film preventing polluting effect.At the filtered water of film treater 6 608 places that enter the mouth, also and be connected to sluicing valve 15, gas backwash valve 16 and medicine-chest shutoff valve 17.After the 6 each drainings of film treater were finished, pressurized air was carried out air purge by the separating film of 16 pairs of membrane modules of gas backwash valve; Film treater 6 can also utilize the seawater of cleaning or fresh water that membrane module is cleaned; Dosing pump 13, medicine are washed the coordination of shutoff valve 12 and medicine-chest shutoff valve 17 after the long-term use, the cleaning agent that cleans in the medicine-chest 14 is circulated between membrane module and the medicine-chest, make separating film keep working flux preferably, owing to clean medicine reuse constantly, membrane module does not need to pull down, make things convenient for the use operation on the boats and ships, prolonged the service life of membrane module greatly.
Temperature booster 1 as shown in Figure 2 comprises temperature booster housing 101, and this temperature booster housing 101 is cylindrical tube shape, and the coated outside at tubular shell during use has thermal insulation material, to improve heat efficiency.Lower position at the temperature booster housing 101 of cylindrical tubular, be provided with oily water access tube 103, the upper position of temperature booster housing 101 then is provided with heated oil bilge discharge pipe 108, oily water is in oily water access tube 103 enters into the tube chamber of temperature booster housing 101, discharge by heated oil bilge discharge pipe 108 again, and be sent in the oily water gravity separator.Be provided with the some steam heating pipes that are arranged in juxtaposition 102 in the tube chamber of temperature booster housing 101, every steam heating pipe 102 all is inverted U type tubulose, and an end of its U type pipe is the steam inlet end, and the other end then is the steam (vapor) outlet end.Lower end at temperature booster housing 101 is fixedly connected with the heating pipe Connection Block hermetically, this heating pipe Connection Block has built-in cavity, this built-in cavity is separated into steam feeding chamber and steam discharge side by the separation dividing plate of radial arrangement, steam heating pipe 102 is fixedly installed on the heating pipe Connection Block, the arrival end of inverted U type steam heating pipe 102 feeds the chamber with steam and is connected, and the exit end of steam heating pipe 102 is connected with the steam discharge side.Steam access tube 105 and vapour-discharge tube 106 are housed on the heating pipe Connection Block; The steam that steam access tube 105 is positioned at the heating pipe Connection Block feeds the position, chamber, feeds the chamber and lead to steam; Vapour-discharge tube 106 is positioned at the steam discharge side position of heating pipe Connection Block and is communicated with it.Drain valve commonly used is installed on vapour-discharge tube 106, and this drain valve is automatically got rid of the condensed water in the steam line during work, and prevents steam leakage.Steam on-off valve commonly used is installed on steam access tube 105, with control steam inflow and end, and control steam the flow size, reach the purpose of keeping constant temperature automatically.
In gravity separator shown in Figure 32, gravity separator 2 comprises cylindrical shell 211 and oily water inlet port 213 provided thereon, cover 201, separate water outlet 209, mud discharging mouth 210 and be arranged at waste oil discharge side 214 on the cover 201.The tube chamber of gravity separator 2 is by cylindrical shell 211 and be attached thereto the cover 201 that connects and constitute, and cylindrical shell 211 is connected by butt flange 202 with cover 201, and its chamber can be divided into standing separation chamber and runner disengagement chamber substantially; Cylindrical shell 211 tops with and on have a circular arch type cover 201 constitute the standing separation chambeies, then be provided with in cylindrical shell 211 bottoms by assembling the folded dish of the ripple oily water runner disengagement chamber that disconnector constituted.In the tube chamber of cylindrical shell 211, be adjacent to be provided with first from top to bottom successively and assemble disconnector 204 and 207 liang of group gatherings of second gathering disconnector disconnector, assemble the upper and lower both sides that disconnector lays respectively at water conservancy diversion orifice plate 206 for these two groups; Water conservancy diversion orifice plate 206 structures in the form of annular discs, the midway location of its water conservancy diversion orifice plate 206 is provided with the water conservancy diversion through hole, flows into the second gathering disconnector 207 so that make oily water assemble disconnector 204 from first.The periphery of water conservancy diversion orifice plate 206 is fixedly installed on the inwall of cylindrical shell 211 by the welding bracing ring in the tube with sealing, stopping that oily water assembles the lower space that enters cylindrical shell between the outside of disconnector 204 and cylinder inboard wall from first, and the guiding oily water compiles the back and enters second from the water conservancy diversion through hole of water conservancy diversion orifice plate 206 and assemble disconnector 207.
Be provided with top blind flange 203 in first top ends of assembling disconnector 204, this top blind flange 203 is flat disc-shaped structure, stay the gap between the inwall of its periphery and cylindrical shell 211, to force oily water radially to enter the first oily water separating flow tract of assembling 215 of the ripple withdrawal plates of disconnector 204 equably, then to be pooled to again the water conservancy diversion through hole that is positioned in the middle of it from first outer periphery of assembling disconnector 204.203 of this top blind flange are passed through studdle 205 and are connected with water conservancy diversion orifice plate 206 fixed pedestals.
Be fixedly provided with water conservancy diversion blind plate 208 in second bottom of assembling disconnector 207, this water conservancy diversion blind plate 208 also is flat disc-shaped structure, and it is mutually permanently connected with water conservancy diversion orifice plate 206 and top blind flange 203 by the connecting screw rod 212 of water conservancy diversion through hole in the middle of being positioned at.Water conservancy diversion blind plate 208 stops from assembling the oily water that the water conservancy diversion through hole flows in the middle of the disconnector and continues to flow out along this through hole, and forces its even updip ground radially to enter in the oil separation runner that the second ripple withdrawal plate 215 of assembling disconnector 207 constitutes.It is dried up quite clean to assemble the branches that disconnectors separate through two groups, and this branchs is dried up to enter into the chamber, the end of cylindrical shell 211 along second peripheral clearance of assembling disconnector, finally through separating water outlet 209 discharges.
First assembles disconnector 204 and second, and to assemble disconnector 207 stacked mutually and constitute by some ripple withdrawal plates 215.Fig. 4 shows one group of schematic construction (assembling disconnector with first is example, and second assembles disconnector has identical structure) of assembling disconnector.The gathering disconnector of this structure includes some mutually stacked ripple withdrawal plates 215, has the conical plate-like structure of water conservancy diversion through hole 216 in the middle of each ripple withdrawal plate 215 is, and card that should the awl dish is corrugated surface, and this card ripple is along the circumferential extension of card.Each ripple withdrawal plate 215 is interlaced stacked with the ripple peak valley of its card, thereby at the peak-to-peak formation of the opposed paddy oily water separating flow tract radially that staggers mutually, because to maximum extremely zero variation again, the maximum height of this oily water runner should be controlled to be in 9mm～25mm scope the height on this oily water runner edge circumferential (width of flow path direction) from zero.This oily water runner radially sectional area of (flow channel length direction) becomes big gradually from the outside of mind-set wherein, perhaps diminishes gradually from the center, lateral.
Neighboring at disconnector can be provided with some support ears, so that to the fixed pedestal of disconnector.In the disconnector of this structure, owing to adopted the wave disc structure, each bellows withdrawal plate 215 interconnects very firm, and does not need other connecting elements, and the spacing that it is mutual or the sectional dimension of separating flow tract depend on the ripple struction size of self.
Fig. 5, Fig. 6 show the structural representation of single ripple withdrawal plate 215 in the disconnector.The card cone angle beta of ripple withdrawal plate 215 is 20 °, and according to medium separation condition, concrete working condition, this card cone angle beta can be carried out between 15 °～30 ° preferably certainly.Above-mentioned as shown card cone angle beta is the angle between card inclination bus and horizon.The plate material of this ripple withdrawal plate 215 is made of plate base material and the oleophobic layer that is overlying on this base material, in the present embodiment, the plate base material is material with the steel plate, oleophobic layer coating material on the plate base material is existing hydrophobic oil nano material, also can adopt corresponding oleophobic material such as poly-4 ethylene oxides.
Fig. 7 shows the gravity separator 2 of another kind of structure, and in this gravity separator, the group number of the gathering disconnector in cylindrical shell 211 and associated mounting means and structure shown in Figure 2 were different, other structures were identical.In structure shown in Figure 7, assemble position, disconnector 207 bottom side second and still be provided with 217 downsides that are positioned at water conservancy diversion blind plate 208 of water conservancy diversion blind plate 208, the three gathering disconnectors.This water conservancy diversion blind plate 208 is still for being flat discoid structure, leave the gap between the inwall of its periphery and cylindrical shell 211, the centre gangway of disconnector flows into the 3rd gathering disconnector 217 so that block water is flowed through, and forces it from the 3rd its middle flowing of lateral of assembling disconnector 217.The 3rd bottom of assembling disconnector 217 is provided with bottom water conservancy diversion orifice plate 218, has the disc-shaped structure of water conservancy diversion through hole in the middle of this bottom water conservancy diversion orifice plate 218 is, and the periphery of this bottom water conservancy diversion orifice plate 218 is fixedly installed on the inwall of cylindrical shell 211 by welding manner with sealing.The branches that the 3rd gathering disconnector 217 further separates are dried up after water conservancy diversion through hole flows into the lower chamber of cylindrical shell 211 in the middle of it, discharge through separation water outlet 209 again.
In Fig. 8, Fig. 9 and film treater shown in Figure 10, this film treater 6 comprises membrane module 605 and metal cylinder 610; Membrane module 605 places in the metal cylinder 610 with a gap, and this membrane module 605 comprises membrane module shell 606 and filter membrane 607, and it adopts hyperfiltration membrane assembly, can certainly be micro-filtration membrane module etc.Metal cylinder 610 adopts tubular structure, and its upper/lower terminal is equipped with mounting flange, and material is Q235.Be socketed with overhead guard 611 at the top of membrane module 605, overhead guard 611 adopts cup-shaped structure, and its back-off is in the top of membrane module 605, and captives joint with metal cylinder 610 by butt flange, the last top of this overhead guard 611 is provided with seepage water outlet 601, and its side then is provided with concentrate outlet 604.Be disposed with top back seal circle 612 and top lower seal 613 from the top down between the inwall of this overhead guard 611 and membrane module 605 top outside, top back seal circle 612 and top lower seal 613 all adopt two road O-ring seals.Side at membrane module 605 tip positions is provided with membrane module concentrated solution outlet 602, top back seal circle 612 and top lower seal 613 are positioned at the upper and lower both sides of membrane module concentrated solution outlet 602, thereby make it to surround annular chamber 603 with membrane module shell 606 and overhead guard 611.Concentrate outlet 604 is positioned at annular chamber 603 positions on the overhead guard 611, and membrane module concentrated solution outlet 602 is connected with concentrate outlet 604 by this annular chamber 603.Be socketed with end cover 609 in the bottom of membrane module 605, be provided with bottom end seal circle 614 between the inwall of this end cover 609 and the membrane module 605 bottom outside faces, this bottom end seal circle 614 adopts two road O-ring seals.End cover 609 also adopts cup-shaped structure, and its cover is buckled in the bottom of membrane module 605, and captives joint with metal cylinder 610 by butt flange, and the bottom part of this end cover 609 is provided with filtered water inlet 608.Bottom end seal circle 614 prevention filtered water enter the space between membrane module 605 and the metal cylinder 610.
In membrane module shown in Figure 10, membrane module 605 adopts general part, but has set up some membrane module concentrated solution outlets 602 equably in the side of tip position, and membrane module concentrated solution outlet 602 equidistantly is arranged on the same cross section of membrane module shell 606.In the present embodiment, on same cross section, membrane module 605 upper ends, be evenly equipped with 6 membrane module concentrated solution outlets 602.Certainly these membrane module concentrated solution outlet 6 quantity should be selected for use at 2～10 according to usage condition, the particular cases such as membrane module specifications and models selected for use, preferably are chosen as 4～8 according to the quantity of this membrane module concentrated solution outlet 6 of analysis of experiments of limited number of time.Upper and lower side at membrane module concentrated solution outlet 602 place cross-sectional planes has also been set up upper and lower seal groove, so that seal ring is installed.Lateral surface also has additional seal groove in the bottom of membrane module 605.
Figure 11 shows another embodiment of the invention, except that the structure of filtering material filter 5 with the foregoing description is different, other structures are identical.In the present embodiment, its filtering material filter 5 adopts double-filtration, the filter core sorbing material still adopts Polymer fibers such as mekralon, but the filter element filtering aperture of one-level filtering material filter 51 is 50 μ m, and the filter element filtering aperture of secondary filtering material filter 52 is 30 μ m; The hydraulic detention time of two-stage filtering material filter 5 all is designed between 0.4min～2min, and filter material surface flow velocity load all should be designed to 3mm 3/ mm 2.s～4mm 3/ mm 2.s.Open filtered water discharge valve I 27 when the filtered water after one-level filtering material filter 51 filters satisfies emission request, filtered water water discharging valve I 27, anti-siphonage pipe 9 and sea valve 10 after filtration drains into outboard.When being discontented with sufficient emission request, filtered water closes filtered water discharge valve I 27, the filtered water of filtering through one-level filtering material filter 51 enters into secondary filtering material filter 52, is delivered to by water discharging valve 28 through the filtered water of cascade filtration again and carries out membrance separation in the film treater 6 and handle.

Claims (10)

1. a method for separating and processing marine oily water is characterized in that this method for separating and processing may further comprise the steps: at first bilge oily water is preheated processing, it is preheated to 48 ℃～58 ℃; Oily water after again this being preheated is delivered to gravitational separation device, make oily water flow through several layers oily water runner in this gravitational separation device, carry out that oil droplet is assembled and the profit gravity separation and isolate waste oil and branch dried up, wherein said oily water runner by the adjacent corrugations withdrawal plate with interlaced stacked the forming of its ripple peak valley; The oily water runner maximum height of this gravitational separation device is 9mm～25mm, and the hydraulic detention time of oily water in gravitational separation device is 15min～25min; Waste oil after gravitational separation device separates is discharged, and divides dried uply then to be delivered to the media filtration device through delivery duct again; Dividing dried up hydraulic detention time in described media filtration device is 0.4min～2min, and filter material surface flow velocity load is 3mm 3/ mm 2.s～4mm 3/ mm 2.s; When the filtered water after the media filtration device filters satisfies effluent standard, it is disposed to outboard, otherwise the filtered water after this filtration is transported to the membrance separation processing equipment through delivery duct, simultaneously, partial concentration liquid in the membrance separation processing equipment is continued to send back to bilge greasy dirt water station, and this partial concentration liquid is 15%～25% of membrance separation processing equipment process load, and remaining concentrate reclaims, in addition, discharge out of my cabin through the seepage water of membrance separation processing equipment.
2. method for separating and processing marine oily water according to claim 1 is characterized in that: described oily water thermal pretreatment adopts steam heating, and by steam oily water is preheated 52 ℃～56 ℃.
3. method for separating and processing marine oily water according to claim 1 is characterized in that: oily water runner maximum height is 16mm～20mm in the described gravitational separation device, and the hydraulic detention time of oily water in gravitational separation device is 18min～22min.
4. method for separating and processing marine oily water according to claim 1, it is characterized in that: the membrane module in the described membrance separation processing equipment adopts the external-compression type hyperfiltration membrane assembly, and the partial concentration liquid that is continued to send back to bilge greasy dirt water station in the membrance separation processing equipment is 18%～22% of its process load.
5. marine oily water processing equipment of realizing the described oily water method for separating and processing of claim 1, it is characterized in that this oil and water treatment equipment comprises temperature booster (1), gravity separator (2), aspirating pump (3), filtering material filter (5) and film treater (6), described temperature booster (1), gravity separator (2), aspirating pump (3), filtering material filter (5) and film treater (6) are connected in regular turn by pipeline; The oily water of described temperature booster (1) feeds mouth and connects to bilge greasy dirt water station (23), and the outlet of the seepage water of described film treater (6) is connected with sea valve (10); Described aspirating pump (3) is positioned on the pipeline that is communicated with gravity separator (2) and filtering material filter (5); In the oily water entrance of described film treater (6) also and be connected with gas backwash valve (16).
6. marine oily water processing equipment according to claim 5 is characterized in that: described temperature booster (1) comprises temperature booster housing (101), and this temperature booster housing (101) is provided with oily water access tube (103) and heated oil bilge discharge pipe (108); Oily water access tube (103) and heated oil bilge discharge pipe (108) are connected with temperature booster housing (101) tube chamber; Described temperature booster housing (101) tube is provided with steam heating pipe (102) in the chamber, and this steam heating pipe (102) two ends are led to steam access tube (105) and vapour-discharge tube (106) respectively.
7. marine oily water processing equipment according to claim 5, it is characterized in that: described gravity separator (2), comprise cylindrical shell (211) and the cover (201) that is connected with cylindrical shell (211), described cylindrical shell (211) is provided with oily water inlet port (213) and separates water outlet (209), is provided with waste oil discharge side (214) on cover (201); In described cylindrical shell (211), be provided with first at least and assemble the disconnector (204) and the second gathering disconnector (207), this first gathering disconnector (204) and second is assembled the upper and lower both sides that disconnector (207) lays respectively at water conservancy diversion orifice plate (206), be fixedly installed on the inwall of cylindrical shell (211), the midway location of water conservancy diversion orifice plate (206) is provided with the water conservancy diversion through hole border seal of this water conservancy diversion orifice plate (206); Described first top of assembling disconnector (204) is provided with top blind flange (203), leaves the gap between periphery of this top blind flange (203) and cylindrical shell (211) inwall; Described second bottom of assembling disconnector (207) is provided with water conservancy diversion blind plate (208), leaves the gap between the inwall of the periphery of this water conservancy diversion blind plate (208) and cylindrical shell (211); The first gathering disconnector (204) and/or second is assembled disconnector (207) and is comprised some stacked ripple withdrawal plates (215) mutually, this ripple withdrawal plate (215) is the awl plate-like and card is a corrugated surface, and adjacent corrugations withdrawal plate (215) interlaces folded and formation oily water runner radially with its ripple peak valley.
8. marine oily water processing equipment according to claim 7 is characterized in that: the ripple of described ripple withdrawal plate (215) circumferentially extends along card, and the centre of this ripple conical disc (215) is provided with through hole; Card cone angle beta=15 of ripple withdrawal plate (215) °～30 °.
9. marine oily water processing equipment according to claim 5, it is characterized in that: described film treater (6) comprises membrane module (605), this membrane module (605) is arranged in the metal cylinder (610), the upper end of metal cylinder (610) is fixedly connected with overhead guard (611), and the lower end of metal cylinder (610) is fixedly connected with end cover (609); Side at described membrane module (605) tip position is provided with two membrane module concentrated solution outlets (602) at least, and this membrane module concentrate goes out (602) and is connected with concentrate outlet (604).
10. according to the described marine oily water processing equipment of each claim among the claim 5-9, it is characterized in that: after described film treater (6) filtered water inlet (608) and sea valve (10) are connected with each other, be connected with the filtered water outlet of described filtering material filter (5).
CN2009100349948A 2009-09-17 2009-09-17 Method for separating and processing marine oily water and processing device thereof Expired - Fee Related CN101654150B (en)

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CN101654150B (en) * 2009-09-17 2010-11-17 东台市东方船舶装配有限公司 Method for separating and processing marine oily water and processing device thereof
CN104162746A (en) * 2013-05-19 2014-11-26 苏州众禹环境科技有限公司 Novel deflector hole deformation-resisting welding method
CN105601032A (en) * 2015-12-23 2016-05-25 江苏海事职业技术学院 Marine sewage treatment system and treatment method thereof
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CN201567276U (en) * 2009-09-17 2010-09-01 东台市东方船舶装配有限公司 Marine oily water separating treatment device
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