CN1114458C - Crude oil atmospheric vacuum distillation method with deep stripping process - Google Patents
Crude oil atmospheric vacuum distillation method with deep stripping process Download PDFInfo
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- CN1114458C CN1114458C CN99116877A CN99116877A CN1114458C CN 1114458 C CN1114458 C CN 1114458C CN 99116877 A CN99116877 A CN 99116877A CN 99116877 A CN99116877 A CN 99116877A CN 1114458 C CN1114458 C CN 1114458C
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Abstract
The present invention belongs to a separation method of crude oil distillation with dry type operation, which is characterized in that the vacuum tower side is connected with a washing tank in parallel; the feeding section and the stripping section of a vacuum distillation tower are separated by a liquid seal isolation distributor; oil gas of the stripping section enters the lower part of the washing tank by a communicating pipe; after absorption oil obtained from the three-wire reducing discharge of the vacuum tower is cooled, the absorption oil enters the reverse heat exchange and the mass transfer of downward spraying and upward oil gas from the upper part of the washing tank; the oil gas at the tank top of the washing tank returns the upper part of the vacuum tower, and the tank bottom discharge is used as washing oil to return the vacuum tower. The additionally arranged washing tank makes the residual oil of the stripping section of the vacuum tower experience a deep steam stripping process, and generally, the present invention can make the extracting rate of the vacuum residual oil increased by 3% to 6% on the original basis.
Description
The invention belongs to a kind of distillation separation method of crude oil.
The atmospheric vacuum distillation process of crude oil is called as the tap of petroleum refining, and the size of its energy consumption and separative efficiency directly influence the economic benefit of petroleum refining, so the research of atmospheric and vacuum distillation technology always receives the concern of petroleum refining research field.Early stage wet type decompression distillation is replaced by dry type operation gradually because of energy consumption is excessive, and dry type operating technology effect aspect energy-conservation is significant, but also has obvious defects.Because there is not stripping section in the vacuum tower in the atmospheric and vacuum distillation unit of employing dry type operation, the extracting rate of vacuum tower depends on that substantially the once vaporization by the vacuum decision of the feeding temperature of reduced crude and charging layer separates, the further stripping that lacks stripping section separates, so that dry type is operated general extracting rate is lower.For remedying this defective, existing many improved plans propose in the prior art.96101722.8 patent applications have proposed a kind of crude oil with stripping section process that often reduces pressure as CN, this method is carried traditional atmospheric tower and is heated up in a steamer tower and a rectifying column replacement by one, by proposing the cat head charging flash distillation of heating up in a steamer tower, the steam of generation enters the assigned address of former oil rectifier to crude oil after heat exchange.The steam that the unvaporized liquid phase of crude oil flows downward with the tower still rises in the extraction and distillation of crude oil tower contacts and mass transfer, and oil returns to carry after heating and heats up in a steamer tower at the bottom of the extraction and distillation of crude oil Tata.Carry the diverse location that heats up in a steamer tower and extract four relevant positions that four strands of vapour phase side lines enter rectifying column respectively out, and four side lines of four diverse location extraction of rectifying column are as different clean or whites, residual oil enters vacuum tower at the bottom of the tower of rectifying column after heating.The method that this patent application proposes is compared with traditional atmospheric and vacuum distillation technology, and the process of heating up in a steamer of putting forward has been introduced in air-distillation, and separating effect obviously improves, and the Btu utilization of whole atmospheric vacuum distillation process is reasonable, and the yield of light oil also increases.But problem is this method is to realize reducing energy consumption and improve yield of light oil by the tower of introducing series connection, for new device, requirement has higher equipment investment, for transforming existing atmospheric and vacuum distillation unit, also because of investing high and changing excessive etc. former thereby be difficult to be suitable for.
The purpose of this invention is to provide a kind of new crude oil atmospheric vacuum distillation separation method, it is on the basis of dry type decompression operation vacuum tower equipment to be carried out and not very big change, and makes the extracting rate of vacuum tower that raising is comparatively significantly arranged under the prerequisite that does not obviously increase energy consumption.
Crude oil atmospheric vacuum distillation separation method provided by the invention comprises processes such as the preceding heating of the air-distillation of crude oil, air-distillation, the preceding heating of decompression distillation, decompression distillation.Decompression distillation is the dry type operation, heating before the air-distillation, air-distillation, equipment and technology and the traditional method and indifference of processes such as the preceding heating of decompression distillation, its improvement is that a decompression distillation vacuum distillation tower side cat head in parallel is provided with the washing tank of vacuum blower, the feed zone of vacuum distillation tower and stripping section are isolated distributor by fluid-tight and are separated, the oil gas of stripping section is by entering the bottom of washing tank communicating pipe, take from the distillate that vacuum tower subtracts three-way discharging and after cooling off, enter downward spray and the oil gas reverse heat-exchange and the mass transfer that make progress by washing tank top, the tank deck oil gas discharging of washing tank is returned the top of vacuum tower through vacuum blower, and a jar end discharging is returned vacuum tower as flushing oil.
In order to improve the evaporating surface of drop in washing tank and the vacuum tower stripping section respectively, can be provided with structured packing or grid class filler with the vacuum tower stripping section in the washing tank.
The vacuum tower stripping section is decided on the load of washing tank to the caliber of washing tank bottom communicating pipe, and the inventor thinks that it is suitable that the oil gas speed in communicating pipe is controlled at 0.4～0.6 Mach number, and that the residual voltage of washing tank deck is controlled at 10～30mm Hg is more suitable.
Be understood that, the washing tank that crude oil atmospheric vacuum distillation method suggestion provided by the invention is set up can be designed to smaller volume, in general atmospheric and vacuum distillation unit, can settle easily, change to original device is also very limited, thereby is fit to very much the atmospheric and vacuum distillation unit of existing general dry type operation is implemented to transform.And the coagulated oil gas of the vacuum blower at washing tank top suction can be designed to less numerical value, so steam consumption quantity is extremely low.Compare with existing general dry type operation crude oil atmospheric vacuum distillation method, good effect of the present invention is significant, the above-mentioned washing tank of setting up at the vacuum tower side line makes the residual oil of vacuum tower stripping section experience a dark steam stripped process, generally can make the extracting rate of decompression residuum improve 3%～6% on original basis.
Accompanying drawing 1 and accompanying drawing 2 have been showed two embodiments of the present invention.
Accompanying drawing 1 is the schematic flow sheet of the vacuum tower in the crude oil atmospheric vacuum distillation flow process of embodiment 1 and the washing tank part of setting up;
Accompanying drawing 2 is the schematic flow sheet of the vacuum tower in the crude oil atmospheric vacuum distillation flow process of embodiment 2 and the washing tank part of setting up.
Because the present invention does not change for traditional dry type operation crude oil atmospheric vacuum distillation flow process other parts except that vacuum tower, only provide vacuum tower and the washing tank flow process of setting up does not influence this technical field those skilled in the art the understanding of the present invention.
In the embodiment shown in Figure 1, washing tank 2 is parallel to vacuum tower 1, and it highly approaches the position that vacuum tower subtracts three-way side line discharging.The top of washing tank 2 is provided with vacuum blower 3, and the feed zone of vacuum tower and stripping section are isolated distributor 4 by fluid-tight and separated, and the oil gas in the stripping section enters washing tank by communicating pipe 5 by the oil gas charging aperture 2a of washing tank bottom.Take from the absorption oil that vacuum tower subtracts three-way discharging and after cooling off, enter washing tank, the oil gas of rising and the flushing oil reverse heat-exchange and the mass transfer of spray downwards by the flushing oil import 2b on washing tank top.The discharging of discharging opening 2c utilizes liquid level difference to return the overflash oil oil sump tank of vacuum tower at the bottom of the washing tank, and the oil gas of washing tank top oil gas vent 2d discharging then returns the second line of distillation discharging of vacuum tower and subtracts between the charging of three-way backflow flushing oil.
Be equipped with filler in the vacuum tower stripping section and in the washing tank.
The advantage of embodiment 1 is that the discharging of washing tank overflash oil can utilize liquid level difference to return vacuum tower, and shortcoming is that long length is arranged communicating pipe 5, and this will cause the loss of vacuum in the washing tank.
In the embodiment shown in Figure 2, washing tank 2 is parallel to the stripping section side of vacuum tower 1.The top of washing tank 2 is provided with vacuum blower 3.The feed zone of vacuum tower and stripping section are isolated distributor 4 by fluid-tight and are separated, and the oil gas in the stripping section enters washing tank by communicating pipe 6 by the oil gas charging aperture 2a of washing tank bottom.Take from fraction oil that vacuum tower subtracts three-way discharging and enter washing tank, the oil gas of rising and the flushing oil reverse heat-exchange and the mass transfer of spray downwards by the flushing oil import 2b on washing tank top.The discharging of washing tank bottom outlet 2c is returned vacuum tower by oil pump 7 as light flushing oil, and the oil gas of washing tank top oil gas vent 2d discharging then returns the second line of distillation discharging of vacuum tower and subtracts between the charging of three-way backflow flushing oil.Be equipped with filler in the vacuum tower stripping section and in the washing tank.
The advantage of embodiment 2 is that communicating pipe 6 is shorter, has avoided the loss of vacuum in the washing tank, but must set up an oil pump.
Claims (3)
1, a kind of crude oil atmospheric vacuum distillation method, this method comprises the preceding heating of the air-distillation of crude oil, air-distillation, heating before the decompression distillation, vacuum distillation process, it is characterized in that decompression distillation is the dry type operation, a vacuum tower side cat head in parallel is provided with the washing tank of vacuum blower, the feed zone of vacuum distillation tower and stripping section are isolated distributor by fluid-tight and are separated, the oil gas of stripping section is by entering the bottom of washing tank communicating pipe, take from the absorption oil that vacuum tower subtracts three-way discharging and after cooling off, enter downward spray and the oil gas reverse heat-exchange and the mass transfer that make progress by washing tank top, the top of vacuum tower is returned in the tank deck oil gas discharging of washing tank, and a jar end discharging is returned vacuum tower as flushing oil.
2, the crude oil atmospheric vacuum distillation method of narrating according to claim 1 is characterized in that being provided with in the described washing tank structured packing or grid class filler.
3, the crude oil atmospheric vacuum distillation method of narrating according to claim 1 or 2 is characterized in that described vacuum tower stripping section is provided with structured packing or grid class filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99116877A CN1114458C (en) | 1999-09-15 | 1999-09-15 | Crude oil atmospheric vacuum distillation method with deep stripping process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99116877A CN1114458C (en) | 1999-09-15 | 1999-09-15 | Crude oil atmospheric vacuum distillation method with deep stripping process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1287872A CN1287872A (en) | 2001-03-21 |
| CN1114458C true CN1114458C (en) | 2003-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99116877A Expired - Fee Related CN1114458C (en) | 1999-09-15 | 1999-09-15 | Crude oil atmospheric vacuum distillation method with deep stripping process |
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| CN (1) | CN1114458C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101987049B (en) | 2009-07-30 | 2014-10-01 | 上海微创医疗器械（集团）有限公司 | Method and device for loading medicine and/or polymers on medical appliance |
| CN102125474B (en) | 2010-01-19 | 2012-10-31 | 微创医疗器械(上海)有限公司 | Method and device for loading medicines and/or polymers on medical equipment |
| CN101810936B (en) * | 2010-04-20 | 2011-08-10 | 上海通凌新能源科技发展有限公司 | Safe coupling equipment of atmospheric distillation system and reduced pressure distillation system and using method thereof |
| CN102443407B (en) * | 2010-10-13 | 2014-04-16 | 中国石油化工股份有限公司 | Crude oil deep drawing process method |
| CN102676204A (en) * | 2012-05-16 | 2012-09-19 | 海工英派尔工程有限公司 | Flash distillation washing method for atmospheric and vacuum distillation of crude oil |
| CN102964228B (en) * | 2012-12-06 | 2014-12-24 | 广西京桂香料有限公司 | Natural cinnamaldehyde extraction process |
| CN102964229B (en) * | 2012-12-06 | 2015-04-29 | 广西京桂香料有限公司 | Natural cinnamaldehyde extraction device |
| CN107653005B (en) * | 2016-07-25 | 2019-08-20 | 郑莹 | Decompression distillation system and vacuum distillation deep drawing technique |
| CN112708443B (en) * | 2019-10-24 | 2022-11-15 | 中国石化工程建设有限公司 | Catalytic slurry oil distillation tower and method for intensively washing catalytic slurry oil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0502404A1 (en) * | 1991-03-04 | 1992-09-09 | Federico Esteban Dr. Lantos | Method for decreasing the level of contamination of fuels |
| CN1072200A (en) * | 1991-11-03 | 1993-05-19 | 史万年 | A kind of process flow for petroleum distillation |
| CN1156751A (en) * | 1996-02-09 | 1997-08-13 | 清华大学 | Crude oil atmospheric vacuum rectifying process with extractive distillation zone |
-
1999
- 1999-09-15 CN CN99116877A patent/CN1114458C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0502404A1 (en) * | 1991-03-04 | 1992-09-09 | Federico Esteban Dr. Lantos | Method for decreasing the level of contamination of fuels |
| CN1072200A (en) * | 1991-11-03 | 1993-05-19 | 史万年 | A kind of process flow for petroleum distillation |
| CN1156751A (en) * | 1996-02-09 | 1997-08-13 | 清华大学 | Crude oil atmospheric vacuum rectifying process with extractive distillation zone |
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| CN1287872A (en) | 2001-03-21 |
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Granted publication date: 20030716 Termination date: 20100915 |