CN105031971B - A kind of method realizing oil-water separation in distillation column and oily-water seperating equipment - Google Patents
A kind of method realizing oil-water separation in distillation column and oily-water seperating equipment Download PDFInfo
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- CN105031971B CN105031971B CN201510466578.0A CN201510466578A CN105031971B CN 105031971 B CN105031971 B CN 105031971B CN 201510466578 A CN201510466578 A CN 201510466578A CN 105031971 B CN105031971 B CN 105031971B
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Abstract
The present invention relates to a kind of method realizing oil-water separation in distillation column and oily-water seperating equipment, the condensed water for distillation column endogenous cause of ill cold reflux being produced continues to separate from distillation column system；Arranging oily-water seperating equipment inside distillation column, oily-water seperating equipment is arranged between two-layer tower tray, and oil water mixture flow channel is the downspout of upper strata tower tray or the oil guide pipe installed after upper strata tower tray is set to disconnected tower tray；Oil water mixture utilizes sedimentation theory standing separation in oily-water seperating equipment, and upper oil phase overflow is to lower floor's tower tray, and lower layer of water is discharged outside tower by the U of profit divider passages and drainage channel composition mutually；Set gas phase channel in oily-water seperating equipment to connect with lower floor tower tray gas phase.The present invention, while not affecting the setting of distillation column external structure and normal operating, completes oil water separation process in distillation column, greatly simplifies production technology, significantly reduces cost of investment, and the stability of beneficially distillation column operation.
Description
Technical field
The present invention relates to metallurgical coking industry coking chemical Product recycling technical field, particularly relate to a kind of method realizing oil-water separation in distillation column and oily-water seperating equipment.
Background technology
The technique that coke-oven plant produces thick (gently) benzene commonly used at present is: coal gas is in washing benzene column, through washing oil washing removing benzene class medium, obtain the washing oil (rich oil) rich in benzene, deliver to after rich oil is heated in distillation column, the live (open) steam come with regenerator top strips and distills, and obtains thick (gently) benzaldehyde product.
For ensureing thick (gently) the benzaldehyde product quality produced and stablizing distillation column operation, it is desirable to persistently the condensed water that distillation column endogenous cause of ill cold reflux produces is separated from distillation column system.In prior art, commonly used distillation column is provided with disconnected tower tray and coordinates the method for the outer oil water separator of tower to draw condensed water in tower.But use the mode that distillation column oil water separator is located at outside tower, if oil water separator to be arranged in distillation column frame roof, especially for 50 layers or 55 layers of this high tower, tower top is only this equipment and is accomplished by arranging multilamellar big frame, investment cost can be significantly increased；If oil water separator is arranged on the ground, then need to increase scavenge oil pump, production operation expense can be increased equally.
The Chinese patent of Application No. 201320246473.0 (filing date on May 8th, 2013) discloses " debenzolizing tower of a kind of built-in oil water separator ", it contains jacket structured oil water separator at debenzolizing tower body top, oil water mixture is that side ring completes oil-water separation around distillation column flowing limit, the structure of this mode is complicated, operating platform difficult arrangement；And external jacket can affect the manhole of debenzolizing tower body and arrange, cause overhaul of the equipments, clear up, safeguard inconvenience.
Summary of the invention
The invention provides a kind of method realizing oil-water separation in distillation column, arrange and while normal operating not affecting distillation column external structure, oil water separation process is completed in distillation column, greatly simplifie production technology, significantly reduce cost of investment, and the stability of beneficially distillation column operation；Invention also provides the oily-water seperating equipment for realizing the method.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A kind of method realizing oil-water separation in distillation column, the condensed water for distillation column endogenous cause of ill cold reflux being produced continues to separate from distillation column system；Arranging oily-water seperating equipment inside distillation column, oily-water seperating equipment is arranged between two-layer tower tray, and oil water mixture passage is the downspout of upper strata tower tray or the oil guide pipe installed after upper strata tower tray is set to disconnected tower tray；Oil water mixture utilizes sedimentation theory standing separation in oily-water seperating equipment, and upper oil phase overflow is to lower floor's tower tray, and lower layer of water is discharged outside tower by the U of profit divider passages and drainage channel composition mutually；Set gas phase channel in oily-water seperating equipment to connect with lower floor tower tray gas phase.
Described oily-water seperating equipment is integrated in distillation column, and distillation column is constant at the external diameter of oily-water seperating equipment part.
For realizing the oily-water seperating equipment of a kind of method realizing oil-water separation in distillation column, it is arranged between the two-layer tower tray of distillation column oil-water separation section, including column plate, oil water mixture passage, downflow weir, profit demarcation strip and rhone；Described oil water mixture channel upper connection upper strata tower tray, downflow weir is oppositely arranged with oil water mixture passage, near opposite side tower wall；Groove is offered as aqueous phase downflow weir in the middle part of overflow weir crest, both sides are oil phase downflow weir, and aqueous phase downflow weir forms profit divider passages in inner side with profit demarcation strip, form drainage channel in outside with tower wall, being provided with rhone in drainage channel, the tower wall above rhone is provided with discharge outlet；Setting gas phase channel in the middle part of column plate to connect with lower floor tower tray, gas phase channel top is higher than oil phase downflow weir top 50～500mm, and oil phase downflow weir top is higher than aqueous phase downflow weir top 50～500mm.
Compared with prior art, the invention has the beneficial effects as follows:
1) greatly simplifie production technology, significantly reduce cost of investment, and the stability of beneficially distillation column operation；
2) in oily-water seperating equipment is integrated in distillation column, not changing distillation column external structure, it is simple to arrange the outer operating platform of distillation column, the manhole nor affecting on distillation column body is arranged, convenient operating maintenance；
3) simple in construction, rationally distributed, gas phase, aqueous phase and oil phase all have respective passage, do not affect distillation column normal operating；
4) oily-water seperating equipment and pressure self-balancing in tower, be not required to arrange pressure compensation opening.
Accompanying drawing explanation
Fig. 1 is the front view of oily-water seperating equipment of the present invention.
Fig. 2 is the A-A sectional view in Fig. 1.
Fig. 3 is the B-B sectional view in Fig. 2.
Fig. 4 is the perspective view of A-A section in Fig. 1.
Fig. 5 a is the oily-water seperating equipment each several part scale diagrams one in the embodiment of the present invention.
Fig. 5 b is the oily-water seperating equipment each several part scale diagrams two in the embodiment of the present invention.
In figure: 1. distillation column 2. upper strata tower tray 3. lower floor tower tray 4. oil water mixture passage 5. gas phase channel 6. column plate 7. profit demarcation strip 8. downflow weir 81. aqueous phase downflow weir 82. oil phase downflow weir 9. rhone 10. discharge outlet
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further:
Seeing Fig. 1-Fig. 4, be the structural representation of oily-water seperating equipment of the present invention, present invention one realizes oil-water separation method in distillation column, and the condensed water for distillation column 1 endogenous cause of ill cold reflux being produced continues to separate from distillation column system；Arranging oily-water seperating equipment inside distillation column 1, oily-water seperating equipment is arranged between two-layer tower tray 2,3, and oil water mixture passage 4 is the downspout of upper strata tower tray 2 or the oil guide pipe installed after upper strata tower tray 2 is set to disconnected tower tray；Oil water mixture utilizes sedimentation theory standing separation in oily-water seperating equipment, and upper oil phase overflow is to lower floor's tower tray 3, and lower layer of water is discharged outside tower by the U of profit divider passages and drainage channel composition mutually；Set gas phase channel 5 in oily-water seperating equipment to connect with lower floor tower tray 3 gas phase.
Described oily-water seperating equipment is integrated in distillation column 1, and distillation column 1 is constant at the external diameter of oily-water seperating equipment part.
For realizing the oily-water seperating equipment of a kind of method realizing oil-water separation in distillation column, it is arranged between the two-layer tower tray 2,3 of distillation column 1 oil-water separation section, including column plate 6, oil water mixture passage 4, downflow weir 8, profit demarcation strip 7 and rhone 9；Connection upper strata, described oil water mixture passage 4 top tower tray 2, downflow weir 8 is oppositely arranged with oil water mixture passage 4, near opposite side tower wall；Groove is offered as aqueous phase downflow weir 81 in the middle part of overflow weir crest, both sides are oil phase downflow weir 82, aqueous phase downflow weir 81 forms profit divider passages in inner side with profit demarcation strip 7, drainage channel is formed with tower wall in outside, being provided with rhone 9 in drainage channel, the tower wall above rhone 9 is provided with discharge outlet 10；Setting gas phase channel 5 in the middle part of column plate 6 to connect with lower floor tower tray 3, gas phase channel 5 top is higher than oil phase downflow weir 82 top 50～500mm, and oil phase downflow weir 82 top is higher than aqueous phase downflow weir 81 top 50～500mm.
In the present invention, calculate in tower behind oil-water separation section position in conjunction with distillation column 1 type, scale and Ta Nei reaction process condition, in distillation column 1, between two tower trays 2,3 of oil-water separation section, oily-water seperating equipment is set, utilize oil phase and the density contrast of aqueous phase and profit exclusion principle in oil water mixture, make oil-water separation.Oil phase and aqueous phase outlet are arranged on the opposite side of oil water mixture import, and oil water mixture is in static released state in oily-water seperating equipment, and in making full use of tower, space makes oil-water separation.The density of oil is less than water, and the oil phase on upper strata overflows across oil phase downflow weir 82 overhead stream to lower floor's tower tray 3, and the aqueous phase of lower floor is then discharged outside tower by discharge outlet 10 after aqueous phase downflow weir 81 pushes up overflow by profit divider passages.
In the present invention, it is internal that oily-water seperating equipment is completely integrated in distillation column 1, does not change distillation column 1 diameter.Its oil water mixture passage 4 can be the downspout of upper strata tower tray 2, after upper strata tower tray 2 also can be set to disconnected tower tray, oil guide pipe is installed, the bottom liquid outlet of oil water mixture passage 4 is preferably set near profit boundary, this interfacial level determines through calculating, and concrete calculating process need to consider the relevant conditions such as the type of the internal diameter of distillation column, each portion size and oil.
In oily-water seperating equipment, the gas phase in distillation column 1, liquid phase have respective passage, do not affect distillation column 1 and operate.Oily-water seperating equipment need not pressure compensation opening, separates water out structure and makes its pressure and balance of nature in tower.
Following example are implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.In following embodiment, method therefor is conventional method if no special instructions.
[embodiment 1]
As shown in Figure 1, oil water mixture enters in oily-water seperating equipment along the downspout of upper strata tower tray 2, and oily-water seperating equipment describes device for circle is scarce, utilizes the density contrast of profit and objectionable intermingling principle to make the two separate, oil phase layer is upper, through oil phase downflow weir 82 overflow of downflow weir 8 both sides to lower floor's tower tray 3.Downflow weir 8 middle height is low compared with both sides, for aqueous phase downflow weir 81, profit demarcation strip 7 is channel-section steel shape, formation profit divider passages is combined with aqueous phase downflow weir 81, aqueous phase enters profit divider passages bottom oily-water seperating equipment, and be the spill frid kept flat by aqueous phase downflow weir 81 overflow to drainage channel, the rhone 9 in drainage channel, isolated water after discharge outlet 10 above rhone 9 discharge outside tower.The top of profit demarcation strip 7 is higher than aqueous phase downflow weir 81 top, prevents the oil of flowing full from entering and separates in water.The overhead height of gas phase channel 5 is higher than downflow weir 8 peak, prevents vapor-liquid backmixing.
As a example by producing 1500000 tons of scale coke-oven plants of coke per year, debenzolizing tower diameter DN2400, debenzolizing tower top needs oil-water separation amount to be respectively 16t/h and 5t/h, and the oil-water separation time of staying takes 30min, and oily-water seperating equipment is arranged on the position of 29 layers of tower tray.
As shown in Fig. 5 a and Fig. 5 b, obtaining the 29th layer of tray area by Size calculation in figure is 3.35m2, by oily-water seperating equipment each portion size in data above calculating tower；If oil phase height of weir plate 3m, gas phase channel height is 3.15m, and the height of the most whole oily-water seperating equipment takes 3.5m.
Arranging oil-water separation interface height is 1.2m, and the most separating of oil layer height is 3-1.2=1.8m, by:
ρWater×HWater+ρOil×HOil=ρSeparate water×HSeparate water
After substituting into numerical value, 1000 × 1.2+880 × 1.8=1000 × HSeparate water
In formula: ρWaterThe density of water；HWaterMoisture absciss layer height；ρOilThe density of oil；HOilSeparating of oil layer height；ρSeparate waterSeparate the density of water；HSeparate waterSeparate the height of water；
The height calculating separation water is 2.784m, then 29 layers of plate height of aqueous phase downflow weir apex distance are 2.784m.
Claims (3)
1. the method realizing oil-water separation in distillation column, for holding the condensed water that distillation column endogenous cause of ill cold reflux produces
Continue and separate from distillation column system；It is characterized in that, arranging oily-water seperating equipment inside distillation column, oil-water separation fills
Putting and be arranged between two-layer tower tray, oil water mixture passage is the downspout of upper strata tower tray or after upper strata tower tray is set to disconnected tower tray
The oil guide pipe installed；Oil water mixture utilizes sedimentation theory standing separation, upper oil phase overflow in oily-water seperating equipment
To lower floor's tower tray, lower layer of water is discharged outside tower by the U of profit divider passages and drainage channel composition mutually；Oil-water separation
Set gas phase channel in device to connect with lower floor tower tray gas phase.
A kind of method realizing oil-water separation in distillation column the most according to claim 1, it is characterised in that described
Oily-water seperating equipment is integrated in distillation column, and distillation column is constant at the external diameter of oily-water seperating equipment part.
3. for realizing the oily-water seperating equipment of a kind of method realizing oil-water separation in distillation column described in claim 1,
It is characterized in that, be arranged in distillation column between two-layer tower tray, including column plate, oil water mixture passage, downflow weir, profit
Demarcation strip and rhone；Described oil water mixture channel upper connection upper strata tower tray, downflow weir is relative with oil water mixture passage
Arrange, near opposite side tower wall；Groove is offered as aqueous phase downflow weir in the middle part of overflow weir crest, and both sides are oil phase downflow weir,
Aqueous phase downflow weir forms profit divider passages in inner side with profit demarcation strip, forms drainage channel in outside with tower wall, and draining is led to
Being provided with rhone in road, the tower wall above rhone is provided with discharge outlet；Set gas phase channel in the middle part of column plate to connect with lower floor tower tray,
Gas phase channel top is higher than oil phase downflow weir top 50～500mm, oil phase downflow weir top higher than aqueous phase downflow weir top 50～
500mm。
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| CN201510466578.0A CN105031971B (en) | 2015-08-03 | 2015-08-03 | A kind of method realizing oil-water separation in distillation column and oily-water seperating equipment |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2190854A (en) * | 1986-05-26 | 1987-12-02 | Sasakura Eng Co Ltd | Method and apparatus for separating oil and water |
| CN103160334A (en) * | 2013-03-14 | 2013-06-19 | 济钢集团有限公司 | Method and device for separation of benzene and water in debenzolized rich oil |
| CN203043619U (en) * | 2013-01-07 | 2013-07-10 | 山东轻工业学院 | Sieve plate separation device |
| CN203307289U (en) * | 2013-05-08 | 2013-11-27 | 中冶焦耐工程技术有限公司 | Debenzolization tower with oil-water separator |
| EP2712663A1 (en) * | 2012-10-01 | 2014-04-02 | Basf Se | Apparatus, in particular column, with a horizontal supply for a fluid, in particular two-phase flow, and a deflection unit for that fluid |
-
2015
- 2015-08-03 CN CN201510466578.0A patent/CN105031971B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2190854A (en) * | 1986-05-26 | 1987-12-02 | Sasakura Eng Co Ltd | Method and apparatus for separating oil and water |
| EP2712663A1 (en) * | 2012-10-01 | 2014-04-02 | Basf Se | Apparatus, in particular column, with a horizontal supply for a fluid, in particular two-phase flow, and a deflection unit for that fluid |
| CN203043619U (en) * | 2013-01-07 | 2013-07-10 | 山东轻工业学院 | Sieve plate separation device |
| CN103160334A (en) * | 2013-03-14 | 2013-06-19 | 济钢集团有限公司 | Method and device for separation of benzene and water in debenzolized rich oil |
| CN203307289U (en) * | 2013-05-08 | 2013-11-27 | 中冶焦耐工程技术有限公司 | Debenzolization tower with oil-water separator |
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| CN105031971A (en) | 2015-11-11 |
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Effective date of registration: 20180727 Address after: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Patentee after: ACRE Coking And Refractory (Dalian) Engineering Consulting Corp., MCC Address before: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Patentee before: ACRE Coking and Refractory Engineering Consulting Corporation, MCC |