CN203284373U - Stripping apparatus for naphtha extraction - Google Patents
Stripping apparatus for naphtha extraction Download PDFInfo
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- CN203284373U CN203284373U CN2013202845662U CN201320284566U CN203284373U CN 203284373 U CN203284373 U CN 203284373U CN 2013202845662 U CN2013202845662 U CN 2013202845662U CN 201320284566 U CN201320284566 U CN 201320284566U CN 203284373 U CN203284373 U CN 203284373U
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- pipe
- extraction tower
- naphtha
- methyl alcohol
- mixed solution
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Abstract
The utility model discloses a stripping apparatus for naphtha extraction. The apparatus comprises an extraction tower (1), and an acidic gas discharge pipe (4), a naphtha product discharge pipe (5), a desalinized water feed pipe (3), a methanol naphtha mixture feed pipe (2), a nitrogen gas inlet pipe (6) and a methanol-water discharge pipe (7) which are sequentially arranged from top to bottom and all communicated with the extraction tower (1). The stripping apparatus for the naphtha extraction can improve extraction effect as well as quality of the naphtha product.
Description
Technical field
The utility model relates to a kind of naphtha extraction air-lift device.
Background technology
In coal preparing natural gas process, the raw gas that makes needs to purify, and removes wherein sour gas and the petroleum naphtha that contains, and obtains meeting the qualified purified gas of lower procedure needs.And the raw gas purifying product that obtains can further be isolated naphtha product.
The low-temp methanol of one of raw gas purifying technology washing method purification process, need first in the absorption tower of low temperature washing device for methanol pre-wash section, adopts the desulfurization section rich methanol of a small amount of-40 ℃ to carry out pre-treatment to the oil-containing raw gas.The petroleum naphtha that removes out from raw gas is mixed in cold methanol and further separates to obtain naphtha product with the sour gas of dissolving.At first methyl alcohol petroleum naphtha mixed solution enters the prewashing flashing tower, and then minute two sections sour gas that flash off dissolving flow into extractor and contact with de-salted water after re-heat, extract methyl alcohol from methyl alcohol petroleum naphtha mixed solution, obtain petroleum naphtha.
Separate and obtain petroleum naphtha from methyl alcohol petroleum naphtha mixed solution in existing low-temp methanol washing method purification process, need flash distillation and two steps of extraction, use two tripping devices could obtain to isolate the naphtha product of sour gas and methyl alcohol, processing step is many, and equipment is many.And the naphtha product impurity that is obtained by the technique of prior art and equipment is many, muddy stain, obfuscation, does not meet national standard, can only can be regarded as intermediates.
This shows, what needs were new can separate the device that obtains qualified naphtha product from methyl alcohol petroleum naphtha mixed solution.
The utility model content
The purpose of this utility model is can not obtain the defect of qualified naphtha product in order to overcome existing apparatus, and a kind of naphtha extraction air-lift device that can obtain qualified naphtha product is provided.
to achieve these goals, the utility model provides a kind of naphtha extraction air-lift device, the sour gas vent pipe 4 that this device comprises extraction tower 1 and sets gradually from top to bottom and all with described extraction tower 1, be communicated with, naphtha product vent pipe 5, de-salted water feed-pipe 3, methyl alcohol petroleum naphtha mixed solution feed-pipe 2, nitrogen inlet pipe 6 and methanol-water vent pipe 7, and described sour gas vent pipe 4, described naphtha product vent pipe 5, described de-salted water feed-pipe 3 all is arranged on the top of described extraction tower 1, described methyl alcohol petroleum naphtha mixed solution feed-pipe 2, described nitrogen inlet pipe 6 and described methanol-water vent pipe 7 all are arranged on the bottom of described extraction tower 1, described extraction tower 1 inside is provided with a plurality of sieve plates 8 and a plurality of downtake 9, each sieve plate 8 is all passed by at least one downtake 9, and each downtake 9 all only passes a sieve plate 8.
Preferably, the height of described extraction tower 1 is 10-14:1 with the ratio of diameter.
Preferably, described extraction tower 1 is for tolerating the withstand voltage extraction tower of 0.2-0.3MPa pressure.
Preferably, the distance between plates between adjacent two described sieve plates 8 is 1:2-3.5 with the ratio of the diameter of described extraction tower 1; Downtake 9 on adjacent two described sieve plates 8 is crisscross arranged.
Preferably, the ratio of the diameter of the wide and described extraction tower 1 in the weir of described sieve plate 8 is 1:10-30.
Preferably, the percentage of open area of described sieve plate 8 is 20-40%.
Preferably, the sieve diameter on described sieve plate 8 is 2-3mm.
Preferably, the height of base slot of the downcomer of described downtake 9 is 1:30-50 with the ratio of the diameter of described extraction tower 1.
Preferably, described methyl alcohol petroleum naphtha mixed solution feed-pipe 2 is 1:1-3 with the ratio of the diameter of described nitrogen inlet pipe 6.
Preferably, described sour gas vent pipe 4, described naphtha product vent pipe 5 and described de-salted water feed-pipe 3 are positioned at the top of described sieve plate 8, and described methyl alcohol petroleum naphtha mixed solution feed-pipe 2, described nitrogen inlet pipe 6 and described methanol-water vent pipe 7 are positioned at the below of described sieve plate 8.
While using naphtha extraction air-lift device of the present utility model to extract air lift, make de-salted water and methyl alcohol petroleum naphtha mixed solution add extraction tower from top and the bottom of extraction tower respectively.Inner at extraction tower, de-salted water flows from top to bottom, and methyl alcohol petroleum naphtha mixed solution flows from bottom to top, counter current contact in the space between adjacent two sieve plates, the liquid-liquid extraction that realization is carried out is between the two completed under counter-current operation, reduce the content of first alcohol and water in naphtha product.In this device, setting passes into low-pressure nitrogen from the extraction tower bottom can play gas stripping, and the sour gas that more effectively will be dissolved in methyl alcohol petroleum naphtha mixed solution is isolated, and reduces the content of sour gas in naphtha product.
Naphtha extraction air-lift device of the present utility model is set up the nitrogen inlet pipe dexterously on extraction tower, make and effectively removed sour gas wherein when carrying out petroleum naphtha and methanol extraction separates.
Other feature and advantage of the present utility model will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and forms the part of specification sheets, is used from explanation the utility model with following embodiment one, but does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the naphtha extraction air-lift device schematic diagram according to embodiment of the present utility model.
Fig. 2 is the naphtha extraction tripping device schematic diagram of prior art.
Description of reference numerals
1 extraction tower 2 methyl alcohol petroleum naphtha mixed solution feed-pipe 3 de-salted water feed-pipes
4 sour gas vapor pipe 5 naphtha product vent pipe 6 nitrogen inlet pipe
7 methanol-water vent pipe 8 sieve plate 9 downtakes
10 extractor 11 storage tanks
Embodiment
Below embodiment of the present utility model is elaborated.Should be understood that, embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.
In the utility model,, except specifying, use term " diameter " to refer to the inside diameter in tower, pipe or hole.
the utility model provides a kind of naphtha extraction air-lift device, as shown in Figure 1, the sour gas vent pipe 4 that this device comprises extraction tower 1 and sets gradually from top to bottom and all with described extraction tower 1, be communicated with, naphtha product vent pipe 5, de-salted water feed-pipe 3, methyl alcohol petroleum naphtha mixed solution feed-pipe 2, nitrogen inlet pipe 6 and methanol-water vent pipe 7, and described sour gas vent pipe 4, described naphtha product vent pipe 5, described de-salted water feed-pipe 3 all is arranged on the top of described extraction tower 1, described methyl alcohol petroleum naphtha mixed solution feed-pipe 2, described nitrogen inlet pipe 6 and described methanol-water vent pipe 7 all are arranged on the bottom of described extraction tower 1, described extraction tower 1 inside is provided with a plurality of sieve plates 8 and a plurality of downtake 9, each sieve plate 8 is all passed by at least one downtake 9, and each downtake 9 all only passes a sieve plate 8.
In the utility model, as shown in Figure 1, extraction tower 1 is vertical placement, is divided into successively three sections of top, middle part and bottoms from top to bottom.Top is positioned at the top at middle part, and middle part is positioned at the top of bottom.Extraction tower 1 is used for realizing that de-salted water contacts with methyl alcohol petroleum naphtha mixed solution, thus with the methanol extraction in methyl alcohol petroleum naphtha mixed solution in de-salted water, complete methyl alcohol and separate with the liquid-liquid extraction of petroleum naphtha.in the utility model, the top that de-salted water feed-pipe 3 is communicated with at extraction tower 1, the bottom that methyl alcohol petroleum naphtha mixed solution feed-pipe 2 is communicated with at extraction tower 1, and the density of de-salted water is greater than the density of methyl alcohol petroleum naphtha mixed solution, de-salted water and two strands of material flows of methyl alcohol petroleum naphtha mixed solution can be realized counter current contact in extraction tower 1 like this, be that de-salted water can flow from top to bottom in extraction tower 1, methyl alcohol petroleum naphtha mixed solution can flow from bottom to top in extraction tower 1, make de-salted water and methyl alcohol petroleum naphtha mixed solution realize counter current contact, the extracting and separating effect that can be conducive to both.After extraction was completed, naphtha product was because the density I is discharged with the naphtha product vent pipe 5 that the top from extraction tower 1 is communicated with; The methanol-water vent pipe 7 that the methanol-water mixtures that density is large is communicated with from the bottom at extraction tower 1 is discharged.The sieve plate 8 that arranges in extraction tower 1 middle part and downtake 9 can strengthen mixed effect and the contact area of de-salted water and methyl alcohol petroleum naphtha mixture, more easily reach the partition ratio of expectation, thereby strengthen the effect of liquid-liquid extraction, the effect of raising extracting and separating methyl alcohol from methyl alcohol petroleum naphtha mixed solution, the quality of the naphtha product that raising obtains.
In the utility model, the nitrogen inlet pipe 6 that is communicated with by the bottom at extraction tower 1 can pass into low-pressure nitrogen in extraction tower 1, can be when de-salted water and methyl alcohol petroleum naphtha mixed solution carry out liquid-liquid extraction, the gas stripping that utilizes nitrogen to flow and bring in extraction tower 1 from bottom to top, better the sour gas that dissolves in methyl alcohol petroleum naphtha mixed solution is separated, improved the quality of the naphtha product that obtains.
According to the utility model, there is no particular limitation for the height of described extraction tower 1 and diameter, can select to determine according to the flow of the methyl alcohol petroleum naphtha mixed solution of processing.Under preferable case, the height of described extraction tower 1 is 10-14:1 with the ratio of diameter.
According to the utility model, described extraction tower 1 can operate having under certain pressure, and under preferable case, described extraction tower 1 is for tolerating the withstand voltage extraction tower of 0.2-0.3MPa pressure.
According to the utility model, a plurality of sieve plates 8 are set in the middle part of extraction tower 1.Arranging of described sieve plate 8 can be selected to determine according to the flow of the methyl alcohol petroleum naphtha mixed solution of processing.Under preferable case, the distance between plates between adjacent two described sieve plates 8 is 1:2-3.5 with the ratio of the diameter of described extraction tower 1.
In the utility model, downtake 9 is perpendicular with the plane of sieve plate 8, is arranged on a side of sieve plate 8.Under preferable case, the downtake 9 on adjacent two described sieve plates 8 is crisscross arranged.Wherein said being crisscross arranged refers to that downtake 9 on adjacent two described sieve plates 8 be arranged in parallel (being that axis is parallel) and lays respectively at the opposite side (namely apart from distal-most end) of extraction tower 1, extends the duration of contact of the material of counter current contact thus as far as possible.
According to the utility model, the project organization of described sieve plate 8 can use sieve-plate structure well known in the art.Under preferable case, the ratio of the diameter of the wide and described extraction tower 1 in the weir of described sieve plate 8 is 1:10-30.
According to the utility model, under preferable case, the percentage of open area of described sieve plate 8 is 20-40%.
According to the utility model, under preferable case, the sieve diameter on described sieve plate 8 is 2-3mm.The arrangement of the sieve aperture on sieve plate 8 can be arrangement mode well known in the art, and for example equilateral triangle is arranged.
According to the utility model, the structure of described downtake 9 can adopt downcomer structure well known in the art.Under preferable case, the height of base slot of the downcomer of described downtake 9 is 1:30-50 with the ratio of the diameter of described extraction tower 1.
, according to the utility model, nitrogen inlet pipe 6 is set in the bottom of described extraction tower 1 can passes into low-pressure nitrogen in extraction tower 1, so that the air lift effect to be provided.The air demand of described nitrogen inlet pipe 6 without particular limitation of, can select to determine according to the flow of methyl alcohol petroleum naphtha mixed solution.Under preferable case, described methyl alcohol petroleum naphtha mixed solution feed-pipe 2 is 1:1-3 with the ratio of the diameter of described nitrogen inlet pipe 6.
In the utility model, described sour gas vent pipe 4, described naphtha product vent pipe 5 and described de-salted water feed-pipe 3 are positioned at the top of described sieve plate 8, and described methyl alcohol petroleum naphtha mixed solution feed-pipe 2, described nitrogen inlet pipe 6 and described methanol-water vent pipe 7 are positioned at the below of sieve plate 8.
Fig. 2 is the naphtha extraction tripping device schematic diagram of prior art, and the extracting and separating of wherein completing methyl alcohol petroleum naphtha mixed solution needs extractor 10 and 11 two devices of storage tank.In extractor 10, add methyl alcohol petroleum naphtha mixed solution and de-salted water from methyl alcohol petroleum naphtha mixed solution 2 feed-pipes 2 and de-salted water feed-pipe 3 to extractor 10, both all from top to bottom, also to flow into storage tank 11 after the stream mode contact.Sour gas in methyl alcohol petroleum naphtha mixed solution is discharged from the sour gas vent pipe 4 that is positioned at extractor 10 tops.The mixture of methyl alcohol petroleum naphtha mixed solution and de-salted water is standing and demixing in storage tank 11, and upper strata is that petroleum naphtha is discharged from the naphtha product vent pipe 5 that is positioned at storage tank 11 tops, and the methanol-water mixtures of lower floor is discharged from methanol-water vent pipe 7.
Below with reference to Fig. 1, the working process of naphtha extraction air-lift device of the present utility model is described.Add methyl alcohol petroleum naphtha mixed solution from methyl alcohol petroleum naphtha mixed solution feed-pipe 2 with certain flow, flow from bottom to top in extraction tower 1.Add de-salted water from de-salted water feed-pipe 3 with certain flow, flow from top to bottom in extraction tower 1.Methyl alcohol petroleum naphtha mixed solution and de-salted water flow through a plurality of sieve plates 8 and a plurality of downtake 9 counter current contact, petroleum naphtha after extraction is discharged from the naphtha product vent pipe 5 at the top of extraction tower 1, and methanol-water mixtures is discharged from the methanol-water vent pipe 7 of the bottom of extraction tower 1.Pass into low-pressure nitrogen from nitrogen inlet pipe 6, nitrogen flows from bottom to top by the sieve aperture on a plurality of sieve plates 8 in extraction tower 1, pass the methyl alcohol petroleum naphtha mixed solution and the de-salted water that flow on sieve plate 8, under the gas stripping of nitrogen, isolate the sour gas that dissolves in methyl alcohol petroleum naphtha mixed solution, and from the sour gas vapor pipe 4 at the top that is positioned at extraction tower 1, discharge.
In the utility model, in the bottom of extraction tower 1, nitrogen inlet pipe 6 is set, passes into low-pressure nitrogen in extraction tower 1, utilize the gas stripping of nitrogen more effectively to isolate sour gas in methyl alcohol petroleum naphtha mixed solution.With the extraction agent de-salted water be extracted agent methyl alcohol petroleum naphtha mixed solution from the top of extraction tower 1 and bottom charging respectively.Two kinds of flows are in the process of sieve plate 8 and downtake 9, when upwards flowing, sieve aperture forms a large amount of intensive tiny oil droplets for the methyl alcohol petroleum naphtha mixed solution of oil phase, form disperse phase, for the de-salted water of water is moved down continuously by downtake, form external phase, two kinds of fluid countercurrent current can fully contact, and have greatly improved effect of extracting, have improved the quality of the naphtha product that obtains.
The utility model not only has better effect of extracting than prior art, and can save facility investment and plant area area, reduces manipulation strength.
More than describe preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; in technical conceive scope of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
Need to prove that in addition each the concrete technical characterictic described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode.For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible array modes.
In addition, also can carry out arbitrary combination between various embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. naphtha extraction air-lift device, the sour gas vent pipe (4) that this device comprises extraction tower (1) and sets gradually from top to bottom and all with described extraction tower (1), be communicated with, naphtha product vent pipe (5), de-salted water feed-pipe (3), methyl alcohol petroleum naphtha mixed solution feed-pipe (2), nitrogen inlet pipe (6) and methanol-water vent pipe (7), and described sour gas vent pipe (4), described naphtha product vent pipe (5), described de-salted water feed-pipe (3) all is arranged on the top of described extraction tower (1), described methyl alcohol petroleum naphtha mixed solution feed-pipe (2), described nitrogen inlet pipe (6) and described methanol-water vent pipe (7) all are arranged on the bottom of described extraction tower (1), described extraction tower (1) inside is provided with a plurality of sieve plates (8) and a plurality of downtake (9), each sieve plate (8) is all passed by at least one downtake (9), and each downtake (9) all only passes a sieve plate (8).
2. device according to claim 1, wherein, the height of described extraction tower (1) is 10-14:1 with the ratio of diameter.
3. device according to claim 1, wherein, described extraction tower (1) is for tolerating the withstand voltage extraction tower of 0.2-0.3MPa pressure.
4. the described device of any one according to claim 1-3, wherein, the ratio of the diameter of the distance between plates between adjacent two described sieve plates (8) and described extraction tower (1) is 1:2-3.5; Downtake (9) on adjacent two described sieve plates (8) is crisscross arranged.
5. the described device of any one according to claim 1-3, wherein, the ratio of the diameter of the wide and described extraction tower (1) in the weir of described sieve plate (8) is 1:10-30.
6. the described device of any one according to claim 1-3, wherein, the percentage of open area of described sieve plate (8) is 20-40%.
7. the described device of any one according to claim 1-3, wherein, the sieve diameter on described sieve plate (8) is 2-3mm.
8. device according to claim 1, wherein, the ratio of the diameter of the height of base slot of the downcomer of described downtake (9) and described extraction tower (1) is 1:30-50.
9. the described device of any one according to claim 1-3, wherein, described methyl alcohol petroleum naphtha mixed solution feed-pipe (2) is 1:1-3 with the ratio of the diameter of described nitrogen inlet pipe (6).
10. device according to claim 1, wherein, described sour gas vent pipe (4), described naphtha product vent pipe (5) and described de-salted water feed-pipe (3) are positioned at the top of described sieve plate (8), and described methyl alcohol petroleum naphtha mixed solution feed-pipe (2), described nitrogen inlet pipe (6) and described methanol-water vent pipe (7) are positioned at the below of described sieve plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202845662U CN203284373U (en) | 2013-05-23 | 2013-05-23 | Stripping apparatus for naphtha extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202845662U CN203284373U (en) | 2013-05-23 | 2013-05-23 | Stripping apparatus for naphtha extraction |
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| CN203284373U true CN203284373U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013202845662U Expired - Fee Related CN203284373U (en) | 2013-05-23 | 2013-05-23 | Stripping apparatus for naphtha extraction |
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| CN (1) | CN203284373U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344211A (en) * | 2015-12-02 | 2016-02-24 | 天津渤化永利化工股份有限公司 | Method for efficiently removing impurities in methanol washed in low-temperature methanol washing system |
| CN107029447A (en) * | 2017-05-27 | 2017-08-11 | 江苏华洋尼龙有限公司 | A kind of nylon chips extraction equipment and production line |
| CN107050919A (en) * | 2017-04-25 | 2017-08-18 | 中国石油大学(华东) | A kind of equipment of subsequent leaching |
-
2013
- 2013-05-23 CN CN2013202845662U patent/CN203284373U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344211A (en) * | 2015-12-02 | 2016-02-24 | 天津渤化永利化工股份有限公司 | Method for efficiently removing impurities in methanol washed in low-temperature methanol washing system |
| CN107050919A (en) * | 2017-04-25 | 2017-08-18 | 中国石油大学(华东) | A kind of equipment of subsequent leaching |
| CN107029447A (en) * | 2017-05-27 | 2017-08-11 | 江苏华洋尼龙有限公司 | A kind of nylon chips extraction equipment and production line |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20150523 |
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| EXPY | Termination of patent right or utility model |