CN106241952A - A kind of oil-water separation tower and oil-water separation method - Google Patents

A kind of oil-water separation tower and oil-water separation method Download PDF

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Publication number
CN106241952A
CN106241952A CN201610839264.5A CN201610839264A CN106241952A CN 106241952 A CN106241952 A CN 106241952A CN 201610839264 A CN201610839264 A CN 201610839264A CN 106241952 A CN106241952 A CN 106241952A
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CN
China
Prior art keywords
oil
water separation
filler
water
phase
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Pending
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CN201610839264.5A
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Chinese (zh)
Inventor
白天祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Shenhua Coal to Liquid Chemical Co Ltd
Shenhua Group Corp Ltd
Ordos Coal to Liquid Branch of China Shenhua Coal to Liquid Chemical Co Ltd
Original Assignee
China Shenhua Coal to Liquid Chemical Co Ltd
Shenhua Group Corp Ltd
Ordos Coal to Liquid Branch of China Shenhua Coal to Liquid Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Shenhua Coal to Liquid Chemical Co Ltd, Shenhua Group Corp Ltd, Ordos Coal to Liquid Branch of China Shenhua Coal to Liquid Chemical Co Ltd filed Critical China Shenhua Coal to Liquid Chemical Co Ltd
Priority to CN201610839264.5A priority Critical patent/CN106241952A/en
Publication of CN106241952A publication Critical patent/CN106241952A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/40Devices for separating or removing fatty or oily substances or similar floating material

Abstract

The invention discloses a kind of oil-water separation tower, including the oil extraction section on top, the draining section of bottom and the oil-water separation section between described oil extraction section and draining section, described oil-water separation section makes the sump oil of isolated rise from the discharge of described oil extraction section and make the sewage of isolated decline from the discharge of described draining section;Described oil-water separation section farther includes oil phase section and aqueous phase section, is provided with oleophyllie hydrophobic filler and is positioned at the feed distributor on described oleophyllie hydrophobic filler, be provided with hydrophilic and oleophobic filler in described aqueous phase section in described oil phase section;The invention still further relates to a kind of oil-water separation method.The present invention is not added with any demulsifier, flocculant etc., and simple in construction in oil water separation process, it is simple to operation, and is prone to use with other process step combinations, and is particularly suitable for the oil removal treatment of the trade effluent of complicated component.

Description

A kind of oil-water separation tower and oil-water separation method
Technical field
The present invention relates to oily waste water treatment field, particularly relate to a kind of oil-water separation tower and containing oil separating method.
Background technology
It is frequently necessary in commercial production oil water mixture is carried out oil-water separation, particularly at petrochemical industry, Coal Chemical Industry, oil The industries such as field.Oil and water are the liquid that two classes are immiscible, need according to technique or the requirement of environmental conservation must be entered Row separates.The method of existing oil-water separation has a lot, it is common that utilize profit density contrast to separate, and such as sedimentation, is centrifuged and divides From method, coalescence method, air supporting method, cyclone filter etc., other also has activated carbon or ultrafiltration fiber filter, chemical demulsification, adds thermal release And the method such as membrance separation, and design weir flow plate, porous plate, multi-chamber, mechanical presses etc. utilize the change fluid of apparatus structure Mechanics principle carries out separation etc..These method and devices are respectively arranged with pluses and minuses, and deoiling effect is undesirable on the whole, when there is stop Between long, can not the degree of depth remove small particle oil droplet, produce mud cause secondary pollution problems.
Summary of the invention
It is an object of the invention to provide a kind of oil-water separation tower and oil-water separation method, to solve the profit of oil-polluted water Separate a difficult problem, it is achieved the effective oil-water separation of low cost.
The oil-water separation method of the present invention with device based on following design concept: utilize and contact the change of phase and first abolished and contain The emulsified state of oily water, utilizes filler to increase contact area simultaneously, makes the diameter of oil droplet or water droplet increase, then pass through gravity Effect carries out the separation method of natural subsidence, and oil phase is separated from the water.
According to an aspect of the invention, it is provided a kind of oil-water separation tower, including oil extraction section, the draining of bottom on top Section and the oil-water separation section between described oil extraction section and draining section, described oil-water separation section makes on the sump oil of isolated Rise and discharge from described oil extraction section and make the sewage of isolated to decline from the discharge of described draining section;Described oil-water separation Duan Jinyi Step includes oil phase section and aqueous phase section, is provided with oleophyllie hydrophobic filler and is positioned on described oleophyllie hydrophobic filler in described oil phase section Feed distributor, be provided with hydrophilic and oleophobic filler in described aqueous phase section.
Oil-water separation tower according to the present invention, it is preferable that described hydrophilic and oleophobic filler include separate upper packing section and under Packing section, is additionally provided with withdrawing oil distributor between described upper packing section and lower packing section, on described packing section with under fill out Withdrawing oil is introduced between material section.
Oil-water separation tower according to the present invention, it is preferable that the cross-sectional area of described oil extraction section is more than the horizontal stroke of described oil phase section Sectional area, is set to 1.5-4 times of described oil phase section cross-sectional area than the cross-sectional area of oil extraction section as will be described, more preferably 2-3 times;The cross-sectional area of described draining section is more than the cross-sectional area of described aqueous phase section, than the cross-sectional area of draining section as will be described It is set to 1.5-4 times of described oil phase section cross-sectional area, more preferably 2-3 times.
Oil-water separation tower according to the present invention, it is preferable that between described oleophyllie hydrophobic filler and described hydrophilic and oleophobic filler It is additionally provided with interfacial meter, for monitoring the position of oil-water interfaces between described oleophyllie hydrophobic filler and hydrophilic and oleophobic filler.
Oil-water separation tower according to the present invention, it is preferable that described feed distributor is horizontally disposed circle distributor, bag Two mozzles intersected vertically and connect including ring pipe and be connected to inside described ring pipe, intersecting at described mozzle Place is provided with the opening being connected to extraneous oil-polluted water source, and the lower end of described ring pipe is provided with multiple distribution mouth, to discharge containing greasy dirt Water.
Oil-water separation tower according to the present invention, it is preferable that between described feed distributor and described oleophyllie hydrophobic filler Difference in height is not more than 0.5 meter, further preferably less than 0.4 meter, still more preferably between 0.1 meter-0.3 meter.
Oil-water separation tower according to the present invention, it is preferable that described oil-water separation tower also includes that sump oil surge tank, sewage buffer Tank, filter, backflow oil pump and sewage surge tank;
Described oil extraction section is connected to described sump oil surge tank, described sump oil surge tank, filter, withdrawing oil by pipeline Pump, withdrawing oil distributor are sequentially connected with by pipeline, so that sending into as withdrawing oil after in described sump oil surge tank, sump oil filters In described oil-water separation tower, described draining section is connected to described sewage surge tank, the top of described sump oil surge tank by pipeline Being provided with sump oil outlet, the bottom of described sewage surge tank is provided with outlet of sewer.
According to another aspect of the present invention, it is provided that a kind of side utilizing above-mentioned oil-water separation tower to carry out oil-water separation Method, including:
Oil-polluted water introduces described oil-water separation tower, and in described oil-water separation tower, in described oil phase section, oil phase is for even Continuous phase, aqueous phase position continuous phase in described aqueous phase section, the oil-water interfaces of described oil phase and aqueous phase be positioned at described oleophyllie hydrophobic filler with Between hydrophilic and oleophobic filler;
Described oil-polluted water contacts with the oleophyllie hydrophobic filler in described oil phase, makes the sump oil in described oil-polluted water convert For continuous phase, sewage is converted into dispersion phase and contacts with the hydrophilic and oleophobic filler in described aqueous phase under gravity, makes described The sump oil carried secretly in sewage collects and floats separation further.
Method in accordance with the invention it is preferred that described hydrophilic and oleophobic filler is set to separate upper packing section and under fill out Material section, introduces withdrawing oil on described between packing section and lower packing section;Preferably, described withdrawing oil is discharged with described oil extraction section The ratio of flow of sump oil be 1:2-10, more preferably 1:3-8, the most preferably 1:4-6.
Method in accordance with the invention it is preferred that the flow velocity of the oil-polluted water of described feed distributor outflow is not more than 0.5m/ S, further preferably flow velocity is not more than 0.4m/s, and still more preferably flow velocity is 0.15m/s-0.3m/s;Described withdrawing oil Sump oil after filtering further after being expelled directly out for described oil extraction section or discharge;The withdrawing oil that described withdrawing oil distributor flows out Flow velocity be not more than 0.5m/s, further preferably flow velocity is not more than 0.4m/s, and still more preferably flow velocity is 0.15m/s- 0.3m/s。
Compared with prior art, this invention has the advantage that
(1) it is not added with any demulsifier, flocculant, can effectively save energy and reduce the cost, reduce production cost;
(2) utilize oil reservoir, water layer and filler that oil-polluted water carries out breakdown of emulsion, and sump oil backflow is set, make full use of " similar Mix " principle, it is particularly suitable for the oil removal treatment of the trade effluent of complicated component.
(3) the oil-water separation theory of the present invention is advanced, and the technological process of oil removing unit is simple, it is simple to operation, and be prone to Other process step combinations uses.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the oil-water separation system of the present invention;
Fig. 2 is the schematic diagram of feeder in Fig. 1.
Detailed description of the invention
Further describe oil-water separation tower provided by the present invention and separation method below in conjunction with the accompanying drawings, but the present invention The most any way limited.
As it is shown in figure 1, the oil-water separation tower of the offer of the present invention include the oil extraction section 11 on top, bottom draining section 13 with And the oil-water separation section 10 between described oil extraction section 11 and draining section 13, through the dirt of described oil-water separation section 10 isolated Oil rise discharges from described oil extraction section 11, through described oil-water separation section 10 isolated sewage decline from described draining section 13 row Go out;Described oil-water separation section 10 farther includes oil phase section 12 and aqueous phase section 15, is provided with oleophyllie hydrophobic and fills out in described oil phase section 12 Expect 14 and be positioned at the feed distributor 17 on described oleophyllie hydrophobic filler 14, in order to can use up from extraneous oil-polluted water May be distributed above described oleophyllie hydrophobic filler 14 equably, in described aqueous phase section 15, be provided with hydrophilic and oleophobic filler 19.Institute Stating oil phase in oil phase section 12 is continuous phase, aqueous phase position continuous phase in described aqueous phase section 15, the oil of wherein said oil phase and aqueous phase Water termination is between described oleophyllie hydrophobic filler 14 and hydrophilic and oleophobic filler 19.
Term " oleophyllie hydrophobic filler " refers to the filler with oleophyllie hydrophobic character, such as, be made up of oleophyllie hydrophobic material Filler, or surface through oleophyllie hydrophobic process thus there is the filler of oleophyllie hydrophobic character, such as polyethylene Pall ring filler, Polypropylene Pall ring filler.The structure of described oleophyllie hydrophobic filler can be multiple, such as Pall ring, cascade ring etc., as long as can To realize the dispersion of oil-polluted water and to be fully contacted with filler.
Term " hydrophilic and oleophobic filler " refers to the filler with hydrophilic and oleophobic character, such as, be made up of hydrophilic and oleophobic material Filler, or surface through hydrophilic and oleophobic process thus there is the filler of hydrophilic and oleophobic character, such as steel Pall ring filler.Institute The structure stating hydrophilic and oleophobic filler can be multiple, such as Pall ring, cascade ring etc., as long as the dispersion of oil-polluted water can be realized And be fully contacted with filler.
In one embodiment, as in figure 2 it is shown, described feed distributor 17 is horizontally disposed circle distributor, including Ring pipe 171 and two mozzles intersected vertically and connect 172 being connected to inside described ring pipe 171, at two water conservancy diversion The intersection of pipe 172 is provided with the opening 174 being connected to extraneous oil-polluted water source, the lower end of described ring pipe 171 be provided with multiple all The distribution mouth of even distribution, oil-polluted water can be evenly distributed on the top of described oleophyllie hydrophobic filler 14 through described distribution mouth.When So, described feed distributor 17 can also is that other liquid distribution trough being suitable for.
In one embodiment, between described oleophyllie hydrophobic filler 14 and hydrophilic and oleophobic filler 19, it is additionally provided with interfacial meter 16, For the height of monitoring oil-water interfaces between described oleophyllie hydrophobic filler 14 and hydrophilic and oleophobic filler 19, described to ensure Oleophyllie hydrophobic filler 14 is fully located in oil phase, and described hydrophilic and oleophobic filler 19 is positioned in aqueous phase.
The present invention one preferred embodiment in, described hydrophilic and oleophobic filler 19 farther include separate on fill out Material section 19a and lower packing section 19b, be additionally provided with withdrawing oil distributor 18, institute between described upper packing section 19a and lower packing section 19b State withdrawing oil distributor 18 by pipeline to introducing withdrawing oil between described upper packing section 19a and lower packing section 19b and making described Withdrawing oil is uniformly distributed in aqueous phase between packing section 19a and lower packing section 19b on described.In one embodiment, described The structure of withdrawing oil distributor 18 is substantially the same with the structure of the feed distributor shown in Fig. 2, and described withdrawing oil is from described Withdrawing oil distributor 18 flows upwards out.
Described withdrawing oil can be (such as to filter after further treatment after described oil extraction section 11 is expelled directly out or discharges Deng) after sump oil, or can be some other oil of being suitable for.
Described withdrawing oil flows up in described aqueous phase section 15, inversely contacts on described with sewage in packing section 19a. The big floating of oil droplet change that this withdrawing oil is conducive to accelerating in described upper packing section 19a is set, expands separating effect;Reduce described oil Solid content in section 12, prevents new emulsion mutually;And it is each to utilize extraction principle to reduce further in sewage Plant content of organics, there is the effect reducing water outlet COD.Preferably, the sump oil that described withdrawing oil is discharged with described oil extraction section 11 The ratio of flow be 1:2-10, more preferably 1:3-8, the most preferably 1:4-6.
Preferably, the cross-sectional area of described oil extraction section 11 is more than the cross-sectional area of described oil phase section 12, and ratio is arranged as will be described The cross-sectional area of oil section 11 is set to 1.5-4 times of described oil phase section cross-sectional area, more preferably 2-3 times;Described draining section The cross-sectional area of 13, more than the cross-sectional area of described aqueous phase section 15, is set to described oil than the cross-sectional area of draining section as will be described 13 1.5-4 times of section cross-sectional area mutually, more preferably 2-3 times.Using this design, upwards or water is downward can to slow down oil Flow rate, it is to avoid back-mixing or carry secretly.
Preferably, in vertical direction, the distance between described feed distributor 17 and oleophyllie hydrophobic filler 14 is less than 0.5 meter, preferably more than 0.4 meter, further preferably between 0.1 meter-0.3 meter, so that from described feed distributor 17 Oil-polluted water can preferably enter in described oleophyllie hydrophobic filler 14.
During operation, oil-polluted water first passes around feed distributor 17 and is distributed above described oleophyllie hydrophobic filler 14, described The actual flow according to oil-polluted water such as the caliber of feed distributor 17, opening diameter, perforate distribution calculates and determines.Preferably, Oil-polluted water flows in described oil-water separation tower with mild stream (non-ejection state), it is to avoid described oil phase is produced bigger disturbance And impact, the flow velocity of the oil-polluted water such as flowed out from described feed distributor 17 is not more than 0.5m/s, further preferably flows It is 0.15m/s-0.3m/s that speed is not more than 0.4m/s, still more preferably flow velocity.Oil-polluted water contacts with the oil phase in tower, with Time start to flow downward due to action of gravity, enter oleophyllie hydrophobic filler 14.Sewage is that drop-wise passes at oil reservoir, and this section of sewage is Dispersion phase, oil are continuous phase.Owing to entering the state in " oil-in-water " of the oil in the oil-polluted water in tower, oil is dispersion phase, During through oil phase, by " oil-in-water " type gradually to " Water-In-Oil " type transition.Existing in transformation process preponderates with water is converted into With oily dominant conversion trend, the oil droplet adventitia in oil-polluted water at this moment is highly unstable, simultaneously because oleophyllie hydrophobic is filled out The effect of material 14, adds contact area, and oil droplet gradually imports oil phase owing to the oil-wetted surface of oleophyllie hydrophobic filler 14 adheres to In, and water becomes water droplet on the surface of filler hydrophobic, converges the most further and grows up.
Sewage is by after oil phase, owing to action of gravity continues to move downward, enters the upper filler of hydrophilic and oleophobic filler 19 Section 19a.Sewage passes in aqueous phase, in aqueous phase due to liquid flowing carry secretly, the oil droplet of back mixing is on hydrophilic and oleophobic filler 19 Gradually converging change big, float entrance top oil phase due to density contrast, it is achieved oil-water separation.
Meanwhile, the lower section withdrawing oil in upper packing section 19a is flowed out with stable non-ejection state by withdrawing oil distributor 18, example From as described in the flow velocity of sewage that flows out of feed distributor 18 be not more than 0.5m/s, further preferably flow velocity is not more than 0.4m/ S, still more preferably flow velocity are 0.15m/s-0.3m/s.Withdrawing oil flows up and inversely contacts with dirty sewage, enters one Step takes away the organic substance in sewage.
Sewage through upper packing section 19a continues downwards into lower packing section 19b so that it is in the trace oil droplet carried secretly enter one Walking to collect and become big, floating, the sewage through lower packing section 19b subsequently enters described draining section 13 and discharges.
As it is shown in figure 1, in further preferred embodiment of the present invention, described oil-water separation tower also includes that sump oil buffers Tank 2, sewage surge tank 4, filter 5 and backflow oil pump 3.The oil extraction section 11 of described oil-water separation tower is connected to described by pipeline Sump oil surge tank 2, sends in described sump oil surge tank 2 with the sump oil after separating.Described sump oil surge tank 2, filter 5, return Stream oil pump 3 and withdrawing oil distributor 18 are sequentially connected with by pipeline, using the part sump oil in described sump oil surge tank 2 as backflow Oil sequentially passes through filter 5 and described oil-water separation tower sent into by backflow oil pump 3.Wherein, described filter 5 is for carrying out withdrawing oil Filtering, withdrawing oil is pumped into oil-water separation tower by described backflow oil pump.The draining section 13 of described oil-water separation tower is connected by pipeline To sewage surge tank 2.Additionally, the top of described sump oil surge tank 2 is provided with sump oil outlet, the bottom of described sewage surge tank 4 sets There is outlet of sewer.

Claims (10)

1. an oil-water separation tower, including the oil extraction section on top, the draining section of bottom and be positioned at described oil extraction section and draining section Between oil-water separation section, described oil-water separation section make isolated sump oil rise from described oil extraction section discharge and make separation The sewage obtained declines discharges from described draining section;Described oil-water separation section farther includes oil phase section and aqueous phase section, described oil It is provided with oleophyllie hydrophobic filler mutually in section and is positioned at the feed distributor on described oleophyllie hydrophobic filler, setting in described aqueous phase section There is hydrophilic and oleophobic filler.
2. oil-water separation tower as claimed in claim 1, it is characterised in that described hydrophilic and oleophobic filler includes the upper filler separated Section and lower packing section, be additionally provided with withdrawing oil distributor between described upper packing section and lower packing section, for packing section on described And introduce withdrawing oil between lower packing section.
3. oil-water separation tower as claimed in claim 1, it is characterised in that the cross-sectional area of described oil extraction section is more than described oil phase The cross-sectional area of section;The cross-sectional area of described draining section is more than the cross-sectional area of described aqueous phase section.
4. oil-water separation tower as claimed in claim 1, it is characterised in that described oleophyllie hydrophobic filler is filled out with described hydrophilic and oleophobic Interfacial meter it is additionally provided with, for monitoring the position of oil-water interfaces between described oleophyllie hydrophobic filler and hydrophilic and oleophobic filler between material.
5. oil-water separation tower as claimed in claim 1, it is characterised in that described feed distributor is that horizontally disposed annular is divided Cloth device, including ring pipe and two mozzles intersected vertically and connect being connected to inside described ring pipe, at described water conservancy diversion The intersection of pipe is provided with the opening being connected to extraneous oil-polluted water source, and the lower end of described ring pipe is provided with multiple distribution mouth, with row Go out oil-polluted water.
6. oil-water separation tower as claimed in claim 5, it is characterised in that described feed distributor and described oleophyllie hydrophobic filler Between difference in height be not more than 0.5 meter.
7. the oil-water separation tower as according to any one of claim 1-6, it is characterised in that described oil-water separation tower also includes dirt Oil surge tank, sewage surge tank, filter, backflow oil pump and sewage surge tank;
Described oil extraction section is connected to described sump oil surge tank by pipeline, described sump oil surge tank, filter, backflow oil pump, returns Stream oil distributor is sequentially connected with by pipeline, so that sending into described oil as withdrawing oil after sump oil filters in described sump oil surge tank In water separation column, described draining section is connected to described sewage surge tank by pipeline, and the top of described sump oil surge tank is provided with dirt Oil export, the bottom of described sewage surge tank is provided with outlet of sewer.
8. utilize the method that the oil-water separation tower as according to any one of claim 1-7 carries out oil-water separation, including:
Oil-polluted water introduces described oil-water separation tower, and in described oil-water separation tower, in described oil phase section, oil phase is continuous phase, Aqueous phase position continuous phase in described aqueous phase section, described oil phase and the oil-water interfaces of aqueous phase are positioned at described oleophyllie hydrophobic filler hates with hydrophilic Between oil packing;
Described oil-polluted water contacts with the oleophyllie hydrophobic filler in described oil phase, makes the sump oil in described oil-polluted water be converted into even Continuous phase, sewage is converted into dispersion phase and contacts with the hydrophilic and oleophobic filler in described aqueous phase under gravity, making described sewage In the sump oil carried secretly collect further and float separation.
9. method as claimed in claim 8, it is characterised in that described hydrophilic and oleophobic filler is set to the upper packing section separated With lower packing section, on described, between packing section and lower packing section, introduce withdrawing oil;Described withdrawing oil is discharged with described oil extraction section The ratio of flow of sump oil be 1:2-10.
10. method as claimed in claim 9, it is characterised in that the flow velocity of the oil-polluted water that described feed distributor flows out is not More than 0.5m/s;Described withdrawing oil is the sump oil after described oil extraction section is expelled directly out or discharges after filtering further;Described time The flow velocity of the withdrawing oil that stream oil distributor flows out is not more than 0.5m/s.
CN201610839264.5A 2016-09-21 2016-09-21 A kind of oil-water separation tower and oil-water separation method Pending CN106241952A (en)

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CN201610839264.5A CN106241952A (en) 2016-09-21 2016-09-21 A kind of oil-water separation tower and oil-water separation method

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109694116A (en) * 2019-01-18 2019-04-30 北京京润水务有限公司 A kind of compounded mix unit, dynamic oil-water separating device and separation method using it
CN112429803A (en) * 2020-11-02 2021-03-02 湖南长科诚享石化科技有限公司 Emulsion breaking reactor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109694116A (en) * 2019-01-18 2019-04-30 北京京润水务有限公司 A kind of compounded mix unit, dynamic oil-water separating device and separation method using it
CN112429803A (en) * 2020-11-02 2021-03-02 湖南长科诚享石化科技有限公司 Emulsion breaking reactor

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