CN101264417B - Negative pressure method for enriching nitrogen to protect oil products - Google Patents
Negative pressure method for enriching nitrogen to protect oil products Download PDFInfo
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- CN101264417B CN101264417B CN2007100782973A CN200710078297A CN101264417B CN 101264417 B CN101264417 B CN 101264417B CN 2007100782973 A CN2007100782973 A CN 2007100782973A CN 200710078297 A CN200710078297 A CN 200710078297A CN 101264417 B CN101264417 B CN 101264417B
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Abstract
The invention relates to a protection method for negative pressure enrichment nitrogen, comprising the following steps; air purification: air enters a rough filter and a precise filter under the negative pressure function generated through a storage tank of petroleum product and a vacuum vessel for dehydrating lubricating oil; nitrogen enrichment: gas filtered through the precise filter enters the PRISM nitride membrane separator under the function of negative pressure, automatically enriching the nitrogen in the air; substitution of the air in the oil products vessel for nitrogen: the enriched nitrogen firstly passes by a degreasing filter of the reflux device which is used for preventing oil gas reflux, then passes by a one-way valve of the reflux device which is used for preventing oil gas reflux, then enters a petroleum product storage tank or a vacuum tank for dewater treatment of lubricating oil, to substitute the oxygen-containing air in the oil product vessel. The protection method has the advantages of making full use of the negative pressure generated through the storage tank to make the air enter the nitrogen enrichment device without pressure equipment; protecting oil products utilizing nitrogen, and having low operation cost.
Description
Technical field
The present invention relates to the guard method of oil product, be specifically related to the method for negative pressure enriching nitrogen to protect oil products.
Background technology
Oil product is in storage, because the temperature difference at daytime and night causes the pressure in the oil vessel to change, day temperature is a malleation when raising, be negative pressure evening when temperature reduces, cause oil vessel to suck air at night, get rid of from outlet valve daytime again, owing to constantly entering of air, make oil product generation oxidation deterioration, cause the storage time to shorten.Another kind of situation is that emulsion type lubricant is being carried out in the processed process, and the air that enters in the dewatering system also will produce oxidation to lubricating oil, and oil quality is reduced.
Hydro carbons is followed chain mechanism in the oil product under the normal temperature liquid-phase condition, in the initial period of reaction, generates free radical or free atom because the hydrocarbon molecule of minority is influenced by light, heat or catalyst etc.
These initial activated centre and oxygen effects that generate, the peroxide radical of generation hydrocarbon.
Peroxide radical can by with new hydrocarbon molecule effect, generate single hydrocarbyl superoxide, simultaneously generate a free radical again chain is propagated down:
Hydrocarbon molecule also can directly generate free radical with airborne oxygen effect under suitable condition, for example:
The free radical that generates can make reaction chain continue to propagate, and the hydrogen peroxide of generation then can make hydrocarbon suffer further oxidation.Along with the intensification of reaction, hydrocarbyl superoxide constantly decomposes, and with new hydrocarbon molecule or free radical effect, further oxidation generates various intermediate products, at first is pure and mild ketone.For example:
Except that pure and mild ketone, hydrocarbyl superoxide also can decompose generation aldehyde and primary alconol in the reaction.No matter be that the further oxidation of aldehyde, alcohol or ketone just can generate organic acid, when oxidation is further deepened, alcohol, aldehyde, ketone and further oxidation of acid, just generate the oxidation product that contains two functional groups, as carboxylic acid (alkyd), aldehydic acid, ketone acid, dicarboxyl acid and various ester classes.The carboxylic acid that relative molecular mass is very big, lactide, half lactide and lactone etc. all are stickums, and further oxidative condensation just becomes baroque colloid substance again, make darkening of oil, and acid number (degree) increases.
" oxygen " is key substance in above reaction, as long as oxygen is eliminated, reaction can stop.In order to overcome of the oxidation of airborne oxygen, can utilize the inert nature protection oil product of nitrogen to oil product.The nitrogen of " the Pu Lisen nitrogen membrane separator " that U.S. air Products Co., Ltd produces in (PR3010) can separation of air, because this device is to adopt hollow-fibre membrane enrichment nitrogen from air under positive pressure, so, need the pressurization facility, and range of application is restricted.As not bearing the oil vessel of malleation, it is excessive that malleation nitrogen enters the interior interior mist of container that can quicken of oil storage tank, and this will cause light-end products (as gasoline) evaporation loss to increase, and environmental pollution is increased the weight of.
Summary of the invention
The method that the purpose of this invention is to provide a kind of negative pressure enriching nitrogen to protect oil products, it can solve oil product between the storage life or emulsion type lubricant is carried out in the processed process not oxidized, guarantees the quality of oil product.
The method of negative pressure enriching nitrogen to protect oil products of the present invention, its step is as follows:
The first step, air cleaning: air enters coarse filter under the suction function that the vacuum tank of the oil storage tank of oil product or lubricating oil processed produces, remove solia particle after, enter fine filter again, remove moisture, moisture is discharged from draining valve;
Second step, enrichment nitrogen: the air after fine filter filters, negative pressure (be initiated with-98Pa) under the effect, enter PRISM nitrogen membrane separator (being Pu Lisen nitrogen membrane separator), nitrogen in the automatic enriched air By, its concentration reaches more than 95%, and remaining gas is discharged from exhaust outlet;
The 3rd step, air in the nitrogen replacement oil product container: enrichment nitrogen is earlier through preventing the anti-oil removal filter that flows device of oil gas, removing the oil product of sneaking into discharges from the draining valve of bottom, again through preventing that the anti-check valve that flows device of oil gas from entering the vacuum system jar of oil product oil storage tank or lubricating oil processed, contain the oxygen air in the displacement oil product container, nitrogen gas concn in the oil product container is progressively reached more than 90%, thereby suppressed the oxidation deterioration of oil product.Oil removal filter herein is to prevent that the oily vapour that infiltrates before check valve from causing damage to the nitrogen membrane separator.
The method of described negative pressure enriching nitrogen to protect oil products is provided with hollow-fibre membrane in the PRISM nitrogen membrane separator of used enrichment nitrogen.
The present invention compares with prior art and has the following advantages: the negative pressure that the vacuum tank when having made full use of oil vessel or oil dehydrating produces is a power source, make air enter the nitrogen enriching apparatus, the nitrogen of enrichment enters oil vessel or vacuum tank again, does not need special press device; Utilized the enrichment of doughnut, improved airborne nitrogen gas concn, oil product has been protected airborne nitrogen, not only applied widely, safe and reliable, and also operating cost is very low.
Description of drawings
Fig. 1 is that the present invention is used for schematic diagram that the oil product in the oil vessel is protected.
The specific embodiment
Embodiment one: the present invention protects the oil product in the oil vessel.
Referring to Fig. 1, the first step, air cleaning: air descends and enters coarse filter 1 under the suction function that produces at oil storage tank 6 nocturnal temperatures of oil product, remove solia particle after, enter fine filter 2 again, remove moisture, moisture is discharged from draining valve 2-1; Avoid solia particle and moisture to enter in the oil product oil storage tank, reduce oil quality;
Second step, enrichment nitrogen: the air after fine filter 2 filters, negative pressure (initial-98Pa) effect under, enter the PRISM nitrogen membrane separator (being Pu Lisen nitrogen membrane separator) 3 that hollow-fibre membrane is installed, nitrogen in the automatic enriched air By, its concentration reaches more than 95%, and remaining gas is discharged from exhaust outlet 3-1;
The 3rd step, air in the nitrogen replacement oil storage tank 6: enrichment nitrogen is earlier through preventing the anti-oil removal filter 4 that flows device of oil gas, removing the oil product of sneaking into discharges from the draining valve 4-1 of bottom, again through preventing that the anti-check valve 5 that flows device of oil gas from entering in it from the breather valve 7 of oil storage tank 6, contain the oxygen air in the displacement tank, nitrogen gas concn in the oil product oil storage tank is progressively reached more than 90%, thereby suppressed the oxidation deterioration of oil product, guarantee the quality of oil product.
Embodiment two: the present invention carries out protection in the processed process to lubricating oil.
Still referring to Fig. 1, just the oil storage tank among Fig. 1 is changed into lubricating oil and carry out vacuum tank in the dewatering processing device.
The first step, air cleaning: air enters coarse filter 1 under lubricating oil carries out suction function that the vacuum tank of employed equipment in the processed process produces, remove solia particle after, enter fine filter 2 again, remove moisture, moisture is discharged from draining valve 2-1; Avoid solia particle and moisture to enter in the lubricating oil, reduce quality of lubrication oil;
Second step, enrichment nitrogen: the air after fine filter 2 filters, negative pressure (initial-98Pa) under the effect, enter the PRISM nitrogen membrane separator 3 that hollow-fibre membrane is installed, nitrogen in the automatic enriched air By, its concentration reaches more than 95%, and remaining gas is discharged from exhaust outlet 3-1;
The 3rd step, air in the nitrogen replacement vacuum tank: enrichment nitrogen is earlier through preventing the anti-oil removal filter 4 that flows device of oil gas, removing the oil of sneaking into discharges from the draining valve 4-1 of bottom, again through preventing that the anti-check valve 5 that flows device of oil gas from entering vacuum tank, contain the oxygen air in the displacement tank, nitrogen gas concn in the vacuum tank is progressively reached more than 90%, thereby suppressed lubricating oil oxidation deterioration when the dehydration purified treatment, guarantee its quality.
Be the comparing result that directly enters air and adopt the present invention that oil product is protected below:
Table one 150SN base oil acid number (mgKOH/g) situation of change
Table one is the result of the test of lube base oil.As can be seen from Table I: under the same conditions; through the test of six weeks; the acid number of lubricating oil that feeds the nitrogen-rich gas protection is littler than the acid number of the lubricating oil that does not feed nitrogen-rich gas, and the oil ageing speed that rich nitrogen device is housed is described, than the oxidation rate of being unkitted rich nitrogen device slowly many.
Table two jet fuel acidity (mgKOH/100ml) situation of change
Table two is result of the tests of jet fuel (aviation kerosine).As can be seen from Table II: under the same conditions; the acidity of the jet fuel of feeding nitrogen-rich gas protection is littler than the jet fuel acidity that does not feed nitrogen-rich gas; the oxidation rate of the jet fuel that rich nitrogen device is housed is described, than the oxidation rate of being unkitted rich nitrogen device slowly many.
Table three oil product colourity situation of change
Table three is lube base oil and jet fuel variable color Tachistoscope result, and the big more oxidation of chromatic value is serious more.Therefrom can find out: under the same conditions, the lubricating oil of feeding nitrogen-rich gas protection and the colourity of jet fuel are littler than lube base oil that does not feed nitrogen-rich gas and jet fuel colourity, prove entering of nitrogen-rich gas, have suppressed the oxidation rate of oil product.
Claims (2)
1. the method for negative pressure enriching nitrogen to protect oil products, its step is as follows:
The first step, air cleaning: air enters coarse filter (1) under the suction function that the vacuum tank of the oil storage tank of oil product or lubricating oil processed produces, remove solia particle after, enter fine filter (2) again, remove moisture, moisture is discharged from draining valve (2-1);
Second step, enrichment nitrogen: the air after fine filter filters, under suction function, enter the gloomy PR3010 nitrogen of general reason membrane separator (3), the nitrogen in the automatic enriched air By, its concentration reaches more than 95%, and remaining gas is discharged from exhaust outlet (3-1);
The 3rd step, air in the nitrogen replacement oil product container: enrichment nitrogen is earlier through preventing the anti-oil removal filter (4) that flows device of oil gas, removing the oil of sneaking into discharges from the draining valve (4-1) of bottom, again through preventing that the anti-check valve (5) that flows device of oil gas from entering the vacuum system jar of oil product oil storage tank or lubricating oil processed, contain the oxygen air in the displacement oil product container, the nitrogen gas concn in the oil product container is progressively reached more than 90%.
2. the method for negative pressure enriching nitrogen to protect oil products according to claim 1 is characterized in that: be provided with hollow-fibre membrane in the gloomy PR3010 nitrogen of the general reason membrane separator (3) of enrichment nitrogen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100782973A CN101264417B (en) | 2007-03-16 | 2007-03-16 | Negative pressure method for enriching nitrogen to protect oil products |
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| CN2007100782973A CN101264417B (en) | 2007-03-16 | 2007-03-16 | Negative pressure method for enriching nitrogen to protect oil products |
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| CN101264417A CN101264417A (en) | 2008-09-17 |
| CN101264417B true CN101264417B (en) | 2010-09-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101439256B (en) * | 2008-11-14 | 2011-01-12 | 江苏索普（集团）有限公司 | Film method for recycling CO in high-pressure exhaust from production of acetic acid by carbonylation |
| CN104028056B (en) * | 2014-06-06 | 2016-05-04 | 中国人民解放军后勤工程学院 | A kind of oil storage equipment filtration drying respiratory system |
| CN104909073A (en) * | 2015-05-29 | 2015-09-16 | 中国石油化工股份有限公司 | Method for avoiding gas phase transmission of organic alcohol storage tank area fire hazard |
| CN104925412A (en) * | 2015-05-29 | 2015-09-23 | 中国石油化工股份有限公司 | Method for preventing gas phase spreading of fires of organic aldehyde class tank storage area |
| CN105194977A (en) * | 2015-09-25 | 2015-12-30 | 杭州宝诺化工科技有限公司 | Oil gas recovery apparatus with recycling function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566282A (en) * | 1983-03-19 | 1986-01-28 | Bergwerksverband Gmbh | Method and apparatus for inerting transport containers |
| US4604115A (en) * | 1984-03-23 | 1986-08-05 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method and installation for treating a storage site |
| CN1101783A (en) * | 1993-03-30 | 1995-04-19 | 埃尔夫阿托化学有限公司 | Device for inerting a storage tank |
| CN1498823A (en) * | 2002-10-25 | 2004-05-26 | 株式会社椿 | Oil refine and filling system |
-
2007
- 2007-03-16 CN CN2007100782973A patent/CN101264417B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566282A (en) * | 1983-03-19 | 1986-01-28 | Bergwerksverband Gmbh | Method and apparatus for inerting transport containers |
| US4604115A (en) * | 1984-03-23 | 1986-08-05 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method and installation for treating a storage site |
| CN1101783A (en) * | 1993-03-30 | 1995-04-19 | 埃尔夫阿托化学有限公司 | Device for inerting a storage tank |
| CN1498823A (en) * | 2002-10-25 | 2004-05-26 | 株式会社椿 | Oil refine and filling system |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平5-147690A 1993.06.15 |
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Assignee: Chongqing modern petroleum (Group) Co., Ltd. Assignor: Cheng Chongyuan Contract record no.: 2011500000004 Denomination of invention: Negative pressure method for enriching nitrogen to protect oil products Granted publication date: 20100922 License type: Exclusive License Open date: 20080917 Record date: 20110212 |
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