CN203569036U - Fractionating tower for oil products - Google Patents
Fractionating tower for oil products Download PDFInfo
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- CN203569036U CN203569036U CN201320732357.XU CN201320732357U CN203569036U CN 203569036 U CN203569036 U CN 203569036U CN 201320732357 U CN201320732357 U CN 201320732357U CN 203569036 U CN203569036 U CN 203569036U
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- 239000007788 liquid Substances 0.000 claims abstract description 142
- 239000007921 spray Substances 0.000 claims abstract description 54
- 238000005406 washing Methods 0.000 claims abstract description 53
- 238000012856 packing Methods 0.000 claims abstract description 12
- 238000004821 distillation Methods 0.000 claims description 101
- 239000000945 filler Substances 0.000 claims description 45
- 230000002457 bidirectional effect Effects 0.000 claims description 20
- 238000005194 fractionation Methods 0.000 claims description 20
- 239000010410 layer Substances 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 8
- 238000004523 catalytic cracking Methods 0.000 abstract description 2
- 238000004939 coking Methods 0.000 abstract description 2
- 238000005504 petroleum refining Methods 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 90
- 239000007787 solid Substances 0.000 description 19
- 239000000047 product Substances 0.000 description 15
- 239000000470 constituent Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 238000009826 distribution Methods 0.000 description 9
- 239000000284 extract Substances 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004508 fractional distillation Methods 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses a fractionating tower for oil products in petroleum refining industry, and aims at solving the problems of relatively high fractionating tower for the oil products, great material consumption, relatively high pressure drop of the whole tower and the like caused by relatively high fractionating section packing of the existing fractionating tower for the oil products. According to the fractionating tower for the oil products, disclosed by the utility model, a liquid distributor arranged in each fractionating section is a spray type liquid distributor (3) provided with a single-way spray head (8), and the height of the fractionating section packing (5) is 600-1000mm. The liquid distributor arranged in a washing part is the spray type liquid distributor provided with the single-way spray head or two-way spray head, washing section packing (2) is a packing layer with a three-dimensional grid channel and comprises strip-shaped plates which are arranged in rows in parallel, and the strip-shaped plates in two adjacent rows of the strip-shaped plates are oblique in the reverse directions relative to the horizontal plane and are mutually intersected. The fractionating tower for the oil products, disclosed by the utility model, is mainly used for reduced pressure fractionating towers, normal pressure fractionating towers, catalytic cracking fractionating towers or coking fractionating towers and the like in the petroleum refining industry.
Description
Technical field
The utility model relates to refining of petroleum industry a kind of oil distillation column used.
Background technology
The conventional oil distillation column (for example vacuum fractionation tower) of refining of petroleum industry, comprises cylindrical shell and column internals at present, is divided into feeding part, washing part, fractionation part from bottom to top.Feeding part is provided with gas distributor, and washing part is provided with tank type liquid distributor and is positioned at the washing section filler of tank type liquid distributor below.Distillation stage that fractionation part is provided with multiple (being generally 3～4), each distillation stage is provided with liquid distributor (being generally slot type or spray-type liquid distributor), distillation stage filler and oil header from top to bottom.The subject matter that described oil distillation column exists is: the height of distillation stage filler higher (generally more than 2 meters) in each distillation stage, make the height of oil distillation column higher, cause oil distillation column high material consumption, invest bigger than normally, also make the full tower pressure drop of oil distillation column higher.
Summary of the invention
The purpose of this utility model is to provide a kind of oil distillation column, with solve existing oil distillation column because of the height of distillation stage filler compared with highly making the height of oil distillation column higher, the problem such as high material consumption, full tower pressure drop be higher.
For addressing the above problem, the technical solution adopted in the utility model is: a kind of oil distillation column, comprise cylindrical shell and column internals, be divided into feeding part from bottom to top, washing part, fractionation part, feeding part is provided with gas distributor, washing part is provided with liquid distributor and is positioned at the washing section filler of liquid distributor below, fractionation part is provided with 3～4 distillation stages, each distillation stage is provided with liquid distributor from top to bottom, distillation stage filler and oil header, it is characterized in that: the set liquid distributor of each distillation stage is the spray-type liquid distributor that is provided with one-way sprayer, the height of distillation stage filler is 600～1000 millimeters, the set liquid distributor of washing part is the spray-type liquid distributor that is provided with one-way sprayer or Bidirectional spray head, washing section filler is the packing layer with stereoscopic grid passage, by the stripe board of in a row arranging side by side, formed, each stripe board favours horizontal plane along its length, stripe board in same row's stripe board is parallel to each other, the vergence direction of the stripe board of adjacent two rows in stripe board and horizontal plane is contrary and mutually intersect.
The utility model is mainly used as vacuum fractionation tower, atmospheric fractional tower, catalytic cracking fractionating tower or the coking fractional distillation column etc. of refining of petroleum industry.Compared with prior art, employing the utlity model has following beneficial effect: the height of the set distillation stage filler of the each distillation stage of fractionation part is 600～1000 millimeters, is only approximately 1/3rd to 1/2nd of existing oil distillation column distillation stage packed height.This just makes the aspect ratio of oil distillation column lower, and materials consumption is less, investment is lower; Full tower pressure drop is also lower, is conducive to reduce energy consumption.
The utility model when the vacuum fractionation tower, can reduce at the bottom of the vacuum fractionation tower tower stipulating in oil refining industry the content of light constituent (as be less than 500 ℃ of cuts or be less than 538 ℃ of cuts) in vacuum residuum, improves extracting rate, realize the greatest benefit of oil product combination.When processing Processing High-sulfur High-Acidity Crude Oils, the Corrosion Protection of vacuum fractionation tower cylindrical shell and column internals material is required to very harshness, material price costliness.Adopt scheme of the present utility model, can reduce the materials consumption of vacuum fractionation tower, significantly reduce investment, effectively reduce costs.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.The drawings and specific embodiments do not limit the claimed scope of the utility model.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of oil distillation column of the present utility model.
Fig. 2 is the structural representation of another kind of oil distillation column of the present utility model.
Fig. 3 is the vertical view of a kind of spray-type liquid distributor of the utility model use.
Fig. 4 is the structural representation of being located at a kind of one-way sprayer on spray-type liquid distributor.
Fig. 5 is the structural representation of being located at a kind of Bidirectional spray head on spray-type liquid distributor.
Fig. 6 is the enlarged detail of oil header in Fig. 1 and Fig. 2.
Fig. 7 is the sectional perspective structure enlarged diagram of washing section filler shown in Fig. 1 and Fig. 2.
Fig. 8 is the schematic diagram that shown in Fig. 1 and Fig. 2, in washing section filler, the stripe board in two row's stripe board of any row stripe board both sides is staggeredly arranged.
In Fig. 1 to Fig. 8, same reference numerals represents identical technical characterictic.
Embodiment
Referring to Fig. 1, a kind of oil distillation column of the present utility model, comprises cylindrical shell 10 and column internals, is divided into feeding part, washing part, fractionation part from bottom to top.Feeding part is provided with gas distributor 1, and gas distributor 1 uses conventional gas distributor, as biserial vane-type, tangential etc.Washing part is provided with a liquid distributor and one section and is positioned at the washing section filler 2 of liquid distributor below.Fractionation part is provided with 3～4 distillation stages (shown in Fig. 1 is to be provided with 3 distillation stages), and each distillation stage is provided with liquid distributor, distillation stage filler 5 and oil header 6 from top to bottom.The top of oil distillation column is provided with gas outlet tube 11, and bottom is provided with tower prime cement liquid and extracts pipe 4 out.The column internals of oil distillation column, refers to gas distributor 1, liquid distributor, oil header 6, filler etc.
The utility model, the set liquid distributor of each distillation stage is the spray-type liquid distributor 3 that is provided with one-way sprayer 8, the height h of distillation stage filler 5 is 600～1000 millimeters.Distillation stage filler 5 is existing conventional structured packing (for example Mellapak structured packing).The set spray-type liquid distributor 3 of distillation stage is preferably used the liquid spray distributing device described in CN201454359U.Referring to Fig. 3 (the vertical view dextrorotation that Fig. 3 is equivalent to the set spray-type liquid distributor 3 of distillation stage shown in Fig. 1 and Fig. 2 turn 90 degrees and the view that obtains), it comprises charging supervisor 31, distribution arms 32 and fluid jetting head.Distribution arms 32 is connected with charging supervisor 31, and fluid jetting head is connected with distribution arms 32 and charging supervisor 31.Set fluid jetting head is one-way sprayer 8.Referring to Fig. 4, this one-way sprayer 8 is provided with shower nozzle plug 84, shower nozzle cavity 82, charging straight tube 81 and squit hole 83.Shower nozzle cavity 82 is linear, the cylindrical or back taper of double-paraboloid, and squit hole 83 is loudspeaker wide-angle shape.Described double-paraboloid line head cavity 82 (as shown in Figure 4), refer to that shower nozzle cavity 82 rotates the para-curve rotator shaped that surrounded with the axial line of shower nozzle cavity 82 for turning axle for para-curve, its sidewall is shaped as two para-curves on the vertical plane by shower nozzle cavity 82 axial lines.Described back taper shower nozzle cavity 82, refers to that shower nozzle cavity 82 is for inverted conical butt.For the shower nozzle cavity 82 of non-cylindrical, its diameter refers to the diameter at minimum place.Referring to Fig. 4, charging straight tube 81 is positioned at shower nozzle cavity 82 1 sides and is communicated with shower nozzle cavity 82, and its axis is vertical with the axis of shower nozzle cavity 82.Arrangement mode between one-way sprayer 8 is rounded projections arranged or diamond array.The spray area of described one-way sprayer 8 large (can reach 1.5～2 square metres), uniform effective; Other unidirectional fluid jetting head close with its performance also can be used.The explanation of aforesaid liquid spray distribution apparatus (comprising one-way sprayer 8) structure and operating process, refers to CN201454359U.The set spray-type liquid distributor 3 of each distillation stage can be according to the spray flow of liquid 33 and the cross-sectional area of oil distillation column cylindrical shell 10, adjust quantity, the size of one-way sprayer 8, the liquid spraying out can be covered the horizontal section of the oil distillation column cylindrical shell 10 of corresponding spray-type liquid distributor 3 present positions.
The set oil header 6 of distillation stage can be used existing oil header (for example drum type brake oil header), preferably uses the liquid-collecting box described in CN202642532U.Referring to Fig. 6, oil header 6 is mainly provided with top Bifurcation Set liquid bath 61, middle part Bifurcation Set liquid bath 62 and bottom and gathers intercepting basin 63.Bifurcation Set liquid bath is layered arrangement, and it is one deck that Bifurcation Set liquid bath 61 rows in top arrange for one deck, middle part Bifurcation Set liquid bath 62.Between Bifurcation Set liquid bath in every layer, leave gap, top Bifurcation Set liquid bath 61 and middle part Bifurcation Set liquid bath 62 interlayers leave gap.Top Bifurcation Set liquid bath 61 is connected by strut member with middle part Bifurcation Set liquid bath 62, and each Bifurcation Set liquid bath is connected with cylindrical shell 10 near one end of oil distillation column cylindrical shell 10, and one end of middle part Bifurcation Set liquid bath 62 is gathered intercepting basin 63 with bottom and is connected.Bottom is gathered intercepting basin 63 and is connected with extraction pipe 7.Extract out pipe 7 in oil distillation column of the present utility model, be used as sideline product extract out pipe, each oil header 6 can according to sideline product number arrange one or more extract out pipe 7.With respect to existing drum type brake oil header, the gas distribution that the liquid-collecting box described in CN202642532U can make to flow through obtains more even, thereby guarantees contact fully effectively between gas-liquid, strengthens gas-liquid mass transfer effect.
Existing oil distillation column, washing part typically uses tank type liquid distributor, and first wash section filler (being generally corrugated plate packing) is set below tank type liquid distributor.That the levelness of tank type liquid distributor requires is high, the high and high material consumption of spatial altitude complicated, that take is installed.For overcoming this shortcoming, the utility model is used in washing part the spray-type liquid distributor 3 that is provided with one-way sprayer 8 or Bidirectional spray head 9.Oil distillation column shown in Fig. 1, washs the set spray-type liquid distributor 3 (being provided with one-way sprayer 8) of the part spray-type liquid distributor 3 (comprise one-way sprayer 8) set with distillation stage identical.The another kind of oil distillation column of the utility model shown in Fig. 2 with the difference of oil distillation column shown in Fig. 1 is, on the set spray-type liquid distributor 3 of washing part, setting is the Bidirectional spray head 9 described in CN201702049U.Referring to Fig. 5, Bidirectional spray head 9 is provided with feed-pipe 93, housing 95, is provided with cylindrical cavity 92 in housing 95.Between feed-pipe 93 and cylindrical cavity 92, be provided with connecting passage 94, the two ends of cylindrical cavity 92 are provided with wide-angle flaring exit 91.The spray area of described Bidirectional spray head 9 large (can reach 4～6 square metres), uniform effective; Other two-way fluid jetting head close with its performance also can be used.The structure of above-mentioned Bidirectional spray head 9 and the explanation of operating process, refer to CN201702049U.It is upper that Bidirectional spray head 9 can be connected in distribution arms and charging supervisor described in CN201454359U by the mode identical with one-way sprayer 8, and composition is provided with the spray-type liquid distributor 3 (changing the one-way sprayer in the utility model Fig. 38 into Bidirectional spray head 9) of Bidirectional spray head; Detail drawing omits.The set spray-type liquid distributor 3 of washing part can be according to the spray flow of liquid 33 and the cross-sectional area of oil distillation column cylindrical shell 10, adjust quantity, the size of one-way sprayer 8 or Bidirectional spray head 9, make the liquid spraying out the horizontal section of the oil distillation column cylindrical shell 10 of described spray-type liquid distributor 3 present positions can be covered to (when using Bidirectional spray head 9, forming upper and lower two-layer liquid covers).
The utility model spray-type liquid distributor 3 is used one-way sprayer or the Bidirectional spray head described in CN201454359U or CN201702049U, be because it is relatively simple for structure, it is low to be easy to the spatial altitude manufacturing, take, be conducive to reduce height and the full tower pressure drop of oil distillation column.One-way sprayer 8 and Bidirectional spray head 9 are all difficult for being stopped up by solid particulate, can extension device work-ing life and turnaround.The liquid distribution spraying out due to each one-way sprayer 8 and Bidirectional spray head 9 is even, is fine droplet, so can increase gas-to-liquid contact chance, strengthen gas-liquid mass transfer effect or strengthen the cleaning performance to the contained solid particulate of oil gas.On the set spray-type liquid distributor 3 of washing part, use Bidirectional spray head 9, can be for reducing heavy metal and carbon residue content in sideline product, improve quality product more reliable and effective assurance is provided.
Oil distillation column of the present utility model, the set washing section filler 2 of washing part is the packing layer with stereoscopic grid passage described in CN202876577U.Referring to Fig. 7 and Fig. 8, this packing layer is comprised of the stripe board 20 of in a row arranging side by side, and each stripe board favours horizontal plane along its length; Stripe board in same row's stripe board is parallel to each other, and the vergence direction of the stripe board of adjacent two rows in stripe board and horizontal plane is contrary and mutually intersect.
Referring to Fig. 7, entering oil gas solid content in described washing section filler 2 when higher, purge hole 30 (otherwise just need not arrange) can be set in stripe board 20; About purge hole 30, refer to the explanation of CN202876577U.In operating process, part oil gas blows out (as shown in the arrow Fig. 7) from purge hole 30, upper surface along stripe board 20 is tilted to current downflow, contributes to spray liquid the solid particulate on stripe board 20 upper surfaces and the accumulation of spray liquid drop are washed away.Purge hole 30 is set in stripe board 20, also helps the pressure drop that reduces washing section filler 2.
Referring to Fig. 8, the stripe board of two rows in stripe board of any row stripe board 20 both sides be preferably staggeredly arranged (referring to the explanation of CN202876577U) in above-mentioned washing section filler 2, can strengthen like this solid particulate in the oil gas entering in washing section filler 2 and the collision of stripe board, and extend oil gas and the duration of contact of spray liquid in washing section filler 2, promote solid particulate in oil gas and spray contacting, gathering of liquid drop.
Referring to Fig. 7 and Fig. 8, the main structure parameters of the utility model above-mentioned washing section filler 2 used is as follows: the width e of stripe board 20 is generally 20～200 millimeters, and the interval between two row's stripe board adjacent with a certain row's stripe board is substantially equal to the width of stripe board.Angle α between adjacent two row's stripe board is generally 20～170 degree, is preferably 30 degree, 45 degree or 60 degree.In same row's stripe board, the vertical range s between adjacent two stripe board is generally 30～200 millimeters.The voidage of described washing section filler 2 is generally 99.1%～99.6%; Face shaping is disc, and height k is generally 300～1000 millimeters (being preferably 600 millimeters); Diameter d is slightly less than the interior diameter D of oil distillation column cylindrical shell 10 so that (referring to Fig. 1, Fig. 2) is installed.When described washing section filler 2 (and distillation stage filler 5) is installed in oil distillation column, need to use strut member, press strip etc.; Describe in detail and accompanying drawing omission.
The utility model is used the packing layer with stereoscopic grid passage described in CN202876577U at washing part set washing section filler 2, be because its simple in structure regular, be easy to manufacture, and voidage is higher, gas flux is large, pressure drop is less, be applicable to the occasion that contains solid particulate in high gas-liquid ratio, oil gas, be conducive to reduce the full tower pressure drop of oil distillation column.This filler itself is not easy to be stopped up by solid particulate, can extension device work-ing life and turnaround.
Take the oil distillation column shown in Fig. 1, be used as the vacuum distillation method of vacuum fractionation tower as this oil distillation column of example explanation use below.The oil gas 102 that contains solid particulate [heavy metal (as Ni, V) and char particle etc.] enters gas distributor 1 by the entrance 101 of gas distributor 1, after gas distributor 1 is uniformly distributed, rises, and enters washing section filler 2.Spray liquid 33 enters the set spray-type liquid distributor 3 of washing part from the entrance 30 of spray-type liquid distributor 3, through charging supervisor 31, distribution arms 32, by one-way sprayer 8 evenly ejection downwards, enters washing section filler 2.In washing section filler 2, spray liquid and the oil gas counter current contact that contains solid particulate.A part of solid particulate in oil gas gathers in stripe board, and spray liquid washing away under under stripe board landing.The oil gas that is removed afterwards a part of solid particulate goes out to continue to rise from the overhead stream of washing section filler 2, and during liquid level that adverse current sprays out downwards by one-way sprayer 8, its solid particulate carrying is further washed down.In above-mentioned washing process, the spray liquid flowing downward and the oil gas that contains solid particulate of rising also carry out gas-liquid heat-transfer and mass transfer simultaneously.The cooling of heavy constituent that in rising oil gas, volatility is low, become liquid after cooling, at the bottom of carrying with isolate the spray liquid of the light constituent that volatility is high after mass transfer through gas-liquid heat-transfer together with that the solid particulate that is cleaned is descending and droping to tower, (tower prime cement liquid 40 is vacuum residuum to become tower prime cement liquid 40; Tower prime cement liquid 40 is finally extracted pipe 4 out by tower prime cement liquid and is discharged); After the light constituent that in spray liquid, volatility is high is heated, become vapor phase stream, rise with isolate the rising oil gas of the heavy constituent that volatility is low after mass transfer through gas-liquid heat-transfer together with.Above-mentioned washing process, can prevent from that oil gas from carrying on most of solid particulate to escape, thereby reduces heavy metal and the carbon residue content of sideline product, promotes the quality of sideline product, for downstream unit provides the more raw material of high-quality.
The oil gas (contain washing part and spray the high light constituent of volatility in liquid) of process washing continues up, passes through each distillation stage of fractionation part from bottom to top.In each distillation stage, oil gas is first upwards uniformly distributed by the gap (as shown in the curve arrow in Fig. 6) between the each Bifurcation Set liquid bath of oil header 6, then enters distillation stage filler 5.Spray liquid 33 enters the set each spray-type liquid distributor 3 of each distillation stage from the entrance 30 of spray-type liquid distributor 3, through charging supervisor 31, distribution arms 32, by one-way sprayer 8 evenly ejection downwards, enters distillation stage filler 5.In distillation stage filler 5, spray liquid and oil gas counter current contact are carried out gas-liquid heat-transfer and mass transfer.Afterwards, oil gas goes out to continue to rise from the overhead stream of distillation stage filler 5, and the liquid level that adverse current sprays out downwards by one-way sprayer 8 continues to carry out gas-liquid heat-transfer and mass transfer with spray liquid.In the gas-liquid heat-transfer and mass transfer process carrying out in above-mentioned distillation stage, the cooling of heavy constituent that in rising oil gas, volatility is low, become liquid after cooling, intercepting basin 63 is gathered in seamless unoccupied place falls into oil header 6 with isolate the spray liquid of the light constituent that volatility is high after mass transfer through gas-liquid heat-transfer together with top Bifurcation Set liquid bath 61, middle part Bifurcation Set liquid bath 62 and bottom; Then the liquid in top Bifurcation Set liquid bath 61, middle part Bifurcation Set liquid bath 62 constantly confluxes, finally conflux accumulate to bottom gather in intercepting basin 63.Aforesaid liquid product is extracted pipe (the extraction pipe 7 of oil header 6 each distillation stage) as sideline product out from the sideline product of oil distillation column and is extracted out.In above-mentioned gas-liquid heat-transfer and mass transfer process, after being heated, the light constituent that in spray liquid, volatility is high becomes vapor phase stream, rise with isolate the rising oil gas of the heavy constituent that volatility is low after mass transfer through gas-liquid heat-transfer together with, finally as gas products, from the gas outlet tube 11 at oil distillation column top, extract out.
Oil distillation column of the present utility model, when fractionation part is provided with 3～4 distillation stages, is extracted the sideline product of 3～4 kinds of different boiling ranges out the most at last.Oil distillation column shown in Fig. 1 and Fig. 2, fractionation part is equipped with 3 distillation stages, all extracts the sideline product of 3 kinds of different boiling ranges out.The sideline product of wherein extracting out from a uppermost distillation stage is decompression one line.Entering the spray liquid 33 in the set each spray-type liquid distributor 3 of each distillation stage, is a part (refluxing as the stage casing of returning to oil distillation column) of extracting out from the sideline product of each corresponding distillation stage; Entering the spray liquid 33 in the set spray-type liquid distributor 3 of washing part, is a part (as the washing oil that returns to oil distillation column) of extracting out in addition from the sideline product of a bottom distillation stage.
In the gas-liquid heat-transfer and mass transfer process carrying out in above-mentioned each distillation stage, the liquid countercurrent that one-way sprayer 8 on the oil gas spray-type liquid distributor 3 set with distillation stage rising sprays out downwards contacts when carrying out gas-liquid heat-transfer and mass transfer, a small amount of solid particulate that described oil gas carries can be cleaned again by described spray liquid, and the solid content that oil gas carries is constantly reduced.
The another kind of oil distillation column of the utility model shown in Fig. 2 as the operating process of vacuum fractionation tower with the difference of oil distillation column operating process shown in above-mentioned Fig. 1 is, 9 whiles of Bidirectional spray head on the set spray-type liquid distributor 3 of washing part spray out two-layer liquid with below upward; In washing section filler 2, be removed the oil gas of a part of solid particulate from upwards flow out at the top of washing section filler 2, by this two-layer liquid, wash and carry out gas-liquid heat-transfer and mass transfer, better effects if.
When oil distillation column of the present utility model adopts preferred implementation, (the set spray-type liquid distributor 3 of distillation stage is used the one-way sprayer described in CN201454359U, washing part set spray-type liquid distributor 3 is used one-way sprayer described in CN201454359U or the Bidirectional spray head described in CN201702049U, the set oil header 6 of distillation stage is used the liquid-collecting box described in CN202642532U), under equal conditions compared with the oil distillation column of existing use filler, the height of tower generally can reduce more than 30%, full tower pressure drop generally can reduce more than 5%.Except described full tower pressure drop, other main operational condition and the conventional oil distillation column of existing use filler of the utility model oil distillation column is basic identical, and explanation is omitted.
Claims (3)
1. an oil distillation column, comprise cylindrical shell (10) and column internals, be divided into feeding part from bottom to top, washing part, fractionation part, feeding part is provided with gas distributor (1), washing part is provided with liquid distributor and is positioned at the washing section filler (2) of liquid distributor below, fractionation part is provided with 3～4 distillation stages, each distillation stage is provided with liquid distributor from top to bottom, distillation stage filler (5) and oil header (6), it is characterized in that: the set liquid distributor of each distillation stage is the spray-type liquid distributor (3) that is provided with one-way sprayer (8), the height of distillation stage filler (5) is 600～1000 millimeters, the set liquid distributor of washing part is the spray-type liquid distributor (3) that is provided with one-way sprayer (8) or Bidirectional spray head (9), washing section filler (2) is the packing layer with stereoscopic grid passage, by the stripe board (20) of in a row arranging side by side, formed, each stripe board favours horizontal plane along its length, stripe board in same row's stripe board is parallel to each other, the vergence direction of the stripe board of adjacent two rows in stripe board and horizontal plane is contrary and mutually intersect.
2. oil distillation column according to claim 1, it is characterized in that: described one-way sprayer (8) is provided with shower nozzle plug (84), shower nozzle cavity (82), charging straight tube (81) and squit hole (83), squit hole (83) is loudspeaker wide-angle shape, charging straight tube (81) is positioned at shower nozzle cavity (82) one sides and is communicated with shower nozzle cavity (82), its axis is vertical with the axis of shower nozzle cavity (82), described Bidirectional spray head (9) is provided with feed-pipe (93), housing (95), in housing (95), be provided with cylindrical cavity (92), between feed-pipe (93) and cylindrical cavity (92), be provided with connecting passage (94), the two ends of cylindrical cavity (92) are provided with wide-angle flaring exit (91).
3. oil distillation column according to claim 1 and 2, it is characterized in that: described oil header (6) is provided with top Bifurcation Set liquid bath (61), intercepting basin (63) is gathered in middle part Bifurcation Set liquid bath (62) and bottom, Bifurcation Set liquid bath is layered arrangement, top Bifurcation Set liquid bath (61) row is one deck, middle part Bifurcation Set liquid bath (62) row is one deck, between Bifurcation Set liquid bath in every layer, leave gap, top Bifurcation Set liquid bath (61) and middle part Bifurcation Set liquid bath (62) interlayer leave gap, top Bifurcation Set liquid bath (61) is connected by strut member with middle part Bifurcation Set liquid bath (62), one end of middle part Bifurcation Set liquid bath (62) is gathered intercepting basin (63) with bottom and is connected, bottom is gathered intercepting basin (63) and is connected with extraction pipe (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320732357.XU CN203569036U (en) | 2013-11-12 | 2013-11-12 | Fractionating tower for oil products |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320732357.XU CN203569036U (en) | 2013-11-12 | 2013-11-12 | Fractionating tower for oil products |
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| CN203569036U true CN203569036U (en) | 2014-04-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251152A (en) * | 2018-03-20 | 2018-07-06 | 刘彦昌 | A kind of vacuum tower of waste lubricating oil pretreatment |
| CN111434367A (en) * | 2019-01-11 | 2020-07-21 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
| CN111434366A (en) * | 2019-01-11 | 2020-07-21 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
-
2013
- 2013-11-12 CN CN201320732357.XU patent/CN203569036U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251152A (en) * | 2018-03-20 | 2018-07-06 | 刘彦昌 | A kind of vacuum tower of waste lubricating oil pretreatment |
| CN111434367A (en) * | 2019-01-11 | 2020-07-21 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
| CN111434366A (en) * | 2019-01-11 | 2020-07-21 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
| CN111434366B (en) * | 2019-01-11 | 2021-12-17 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
| CN111434367B (en) * | 2019-01-11 | 2021-12-17 | 中国石油化工股份有限公司 | Dividing wall tower and rectifying tower |
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