CN1066973C - Nitrogen circular stripping process and equipment thereof - Google Patents
Nitrogen circular stripping process and equipment thereof Download PDFInfo
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- CN1066973C CN1066973C CN95106791A CN95106791A CN1066973C CN 1066973 C CN1066973 C CN 1066973C CN 95106791 A CN95106791 A CN 95106791A CN 95106791 A CN95106791 A CN 95106791A CN 1066973 C CN1066973 C CN 1066973C
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Abstract
The present invention relates to a stripping process characterized in that nitrogen is introduced into separated matter and then is circularly stripped. By adopting the technical scheme of the stripping process, no water phase exists in a system, the quality of distilled matter is raised, and the stripping process has the advantages of simple process and reduction of damage to equipment, decreases energy consumption by more than 60% and reduces discharge capacity by more than 90%.
Description
The present invention relates to stripping process, belong to isolation technics, be applicable to separation of material in polynary component, the complex system.
At present, extensively adopt the superheated steam stripping process in technologies such as heavy oil separation, side line stripping, the separation of polynary component, solvent recovery.Because the introducing of water vapour, the separator boiling point reduces, and be easy to vaporization and separate, but in the process of separator condensation cooling, water vapour becomes liquid or subcooled liquid with separator, produces water.Moisture is complicated and difficult the branch to the greatest extent from process, easily runs and decreases distillate, and contaminated environment causes disaster hidden-trouble; The existence of water also can damage process equipment, and especially dew point corrosion threatens more serious.In addition, water vapour energy consumption height, expense is big.Number of patent application is in the technology of CN93101420.4 and PCT file thereof, the gas access is equipped with in multistage suspension reaction fractionating tower bottom at the two enzyme A of preparation, inert gas is successively by each sieve plate screen cloth, contact with liquid on the plate, make light component be carried away and realize separating of light component and heavy component, but its inert gas does not recycle by inert gas, consumption is big, the expense height, and want the tower tray of special construction, the equipment complexity.
The present invention is intended to overcome the deficiencies in the prior art and the nitrogen circular stripping process that provides.
In separator, use the nitrogen stripping, when system stagnation pressure one regularly, because of the existence of nitrogen,, just can vaporize as long as separator reaches stagnation pressure when deducting the pressure of nitrogen partial pressure.Promptly, be easy to vaporization and separate because the existence of nitrogen reduces the separator boiling point.
Technical scheme of the present invention is to realize like this.See Fig. 1.The material that desire is separated enters the middle part of stripper (or vacuum tower) (1), circulating nitrogen gas enters the bottom of stripper (1), counter current contacting on tower tray, the distillate that stripping comes out enters knockout drum (3) with nitrogen behind condensate cooler (2), then, nitrogen advances nitrogen compressor (9), and distillate advances container (7).Nitrogen advances compressor (9) (equipment and pressure-drop in pipeline that the value of boosting is looked outlet institute warp) the laggard water cooler (4) that boosts, depth cooler (5) is chilled to almost completely condensation of separator again, enters knockout drum (6), the distillate that remains in the nitrogen is advanced a part from coming out, advance container (7).Pure nitrogen enters the convection cell of heating furnace (8), is warming up to a little higher than stripper (1) column bottom temperature, enters stripper (1), carries out the circulation of a new round.The nitrogen that replenishes enters knockout drum (3).
Separator in the circulating nitrogen gas is eliminated, be that can the nitrogen circulation stripping successfully crucial, in compressor (9) outlet water cooler (4) and deep freezer (5) are set, at low temperatures, the vapour pressure of separator is very little, contains separator in the circulating nitrogen gas hardly, otherwise, the separator accumulation can't be carried out process in the circulating nitrogen gas; Nitrogen introducing amount is big more, and its partial pressure value is high more, and the corresponding minimizing of separator dividing potential drop is many more, and boiling point reduces remarkable more, and separating effect is good more.
Adopt nitrogen circular stripping process of the present invention, without superheated vapour, lacked water in the system, the quality of distillate improves; reduced the operation of water phase separated, work simplification, process equipment is few undermined; energy consumption reduces more than 60%, and blowdown flow rate reduces more than 90%, helps environmental protection.
The drawing of accompanying drawing is described as follows:
Fig. 1 is the nitrogen circular stripping process flow chart;
Fig. 2 is the nitrogen circular stripping process flow chart of heavy ketone-benzol dewaxing device.
Below in conjunction with embodiment technical scheme of the present invention is done further statement.
Embodiment 1.
Oil plant heavy ketone-benzol dewaxing device is implemented technical scheme of the present invention, in order to the separated from solvent of small amount of residual in the solvent dewaxing process in oil, wax come out.See Fig. 2.The distillate that filtrate stripper (1-1), wax liquid stripper (1-2) stripping come out enters knockout drum (3) respectively with nitrogen behind condensate cooler (2-1), (2-2).Then, distillate advances container (7), and nitrogen advances compressor (9) and boosts to the laggard water cooler of 0.20-0.26MPa (4), filtrate deep freezer (5), be chilled to-5-10 ℃, air inlet liquid knockout drum (6) is because of supercharging, cooling, help remaining separator and thoroughly separate, advance container (7).Pure nitrogen enters the convection cell of heating furnace (8), enters stripper (1-1), (1-2) after being warming up to 250-300 ℃, arrives condensate cooler (2-1), the circulation of (2-2) beginning new round again.The nitrogen that replenishes enters knockout drum (3), by voltage-controlled control valve control.
After present embodiment adopted technical scheme stripping of the present invention, oil, wax contain solvent about 0.05%, and was better than water vapour Srteam Stripping effect, and solvent loss reduces, and energy consumption reduces more than 60%, and blowdown reduces more than 90%; Because of system's water content obviously reduces, thereby save cold, save heat energy, the crystallization crystal is good, rate of filtration height; Dewaxing differential is little, and ratio of solvent reduces, and solvent consumption is little.
Embodiment 2.
Adopt stripping process of the present invention to the higher boiling component, the separation of mixture obtains satisfied effect equally.Circulating nitrogen gas is introduced system, can reach the purpose of decompression distillation.
Claims (6)
1. stripping process, it is characterized in that the nitrogen circulation stripping, the material that separates is entered the middle part of stripper (1), circulating nitrogen gas enters the bottom of stripper (1), counter current contacting on tower tray, separator and nitrogen are through the laggard knockout drum of condensate cooler (2) (3), then, nitrogen advances compressor (9), and distillate advances container (7); Nitrogen advances that compressor (9) boosts after water cooler (4), deep freezer (5) enter knockout drum (6), the distillate that remains in the nitrogen is advanced a part from coming out, advance container (7), the convection cell that pure nitrogen advances heating furnace (8) heats up, and admission stripper (1) carries out new round circulation again.
2. by the described stripping process of claim 1, it is characterized in that nitrogen behind water cooler (4) and deep freezer (5), is chilled to the separator condensation.
3. by the described stripping process of claim 1, it is characterized in that pure nitrogen enters the convection cell of heating furnace (8), be warming up to and be higher than stripper (1) column bottom temperature.
4. by the described stripping process of claim 1, it is characterized in that said stripper (1) is a vacuum tower.
5. realize the device of the described stripping process of claim 1, it is characterized in that being provided with stripper (1), it has material inlet, circulating nitrogen gas inlet, and outlet is connected with the inlet of condensate cooler (2); The outlet of condensate cooler (2) is connected with the inlet of knockout drum (3); One outlet of knockout drum (3) is connected with the inlet of compressor (9), and another outlet is connected with the inlet of container (7); The outlet of compressor (9) is connected with the inlet of water cooler (4); The outlet of water cooler (4) is connected with the inlet of deep freezer (5); The outlet of deep freezer (5) is connected with the inlet of knockout drum (6); One outlet of knockout drum (6) also is connected with the inlet of container (7), and another outlet is connected with the inlet of heating furnace (8); Heating furnace (8) outlet is connected with the circulating nitrogen gas inlet of stripper (1).
6. by the described device of claim 5, it is characterized in that said stripper (1) is a vacuum tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95106791A CN1066973C (en) | 1995-06-30 | 1995-06-30 | Nitrogen circular stripping process and equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95106791A CN1066973C (en) | 1995-06-30 | 1995-06-30 | Nitrogen circular stripping process and equipment thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1139583A CN1139583A (en) | 1997-01-08 |
| CN1066973C true CN1066973C (en) | 2001-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95106791A Expired - Fee Related CN1066973C (en) | 1995-06-30 | 1995-06-30 | Nitrogen circular stripping process and equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1066973C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100091403A (en) * | 2009-02-10 | 2010-08-19 | 에스케이에너지 주식회사 | The method of stripping by using nitrogen |
| CN102268294A (en) * | 2010-06-02 | 2011-12-07 | 中国科学院过程工程研究所 | Recovery method of butanone-toluene solvent in dewaxing process of lubricating oil |
| CN102268281A (en) * | 2010-06-02 | 2011-12-07 | 中国科学院过程工程研究所 | Recovery method of furfural solvent during lube solvent refining |
| CN105670782A (en) * | 2016-01-29 | 2016-06-15 | 北京化工大学 | Oil extraction process |
| CN110724602A (en) * | 2019-10-22 | 2020-01-24 | 中国科学院兰州化学物理研究所 | Preparation method of rose essential oil balm, rose essential oil and production method and application of rose essential oil |
| CN112494993A (en) * | 2020-12-28 | 2021-03-16 | 大连福佳·大化石油化工有限公司 | Adsorption tower stripping system and stripping method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075662A (en) * | 1993-02-17 | 1993-09-01 | 中国石油化工总公司 | Multistage suspension reaction fractionating tower |
-
1995
- 1995-06-30 CN CN95106791A patent/CN1066973C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075662A (en) * | 1993-02-17 | 1993-09-01 | 中国石油化工总公司 | Multistage suspension reaction fractionating tower |
Non-Patent Citations (1)
| Title |
|---|
| 化工词典 第3 版 1992.7.1 王箴主编.化学工业出版社 * |
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| Publication number | Publication date |
|---|---|
| CN1139583A (en) | 1997-01-08 |
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