CN104263510A - Deodorization process for preparation of low-acidity vegetable insulating oil - Google Patents
Deodorization process for preparation of low-acidity vegetable insulating oil Download PDFInfo
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- CN104263510A CN104263510A CN201410528056.4A CN201410528056A CN104263510A CN 104263510 A CN104263510 A CN 104263510A CN 201410528056 A CN201410528056 A CN 201410528056A CN 104263510 A CN104263510 A CN 104263510A
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- oil
- deodorization
- vegetable insulating
- insulating oil
- grease
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/001—Refining fats or fatty oils by a combination of two or more of the means hereafter
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
- C10M101/04—Fatty oil fractions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/008—Refining fats or fatty oils by filtration, e.g. including ultra filtration, dialysis
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/12—Refining fats or fatty oils by distillation
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/12—Refining fats or fatty oils by distillation
- C11B3/14—Refining fats or fatty oils by distillation with the use of indifferent gases or vapours, e.g. steam
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Edible Oils And Fats (AREA)
- Fats And Perfumes (AREA)
Abstract
The invention discloses a deodorization process for the preparation of low-acidity vegetable insulating oil. The deodorization process comprises the following steps: 1, performing deoxidization treatment on the oil; 2, performing stripping deodorization on the oil: (1) pumping pure water into a stripping steam generator, and heating the pure water at 150 DEG C to generate stripping steam, wherein the using amount of the stripping steam is 30 to 50kg/(t oil.h); (2) raising the oil temperature of a deodorization device to 120 to 150 DEG C, opening a steam valve, introducing the stripping steam into the deodorization device so as to form oil mist, opening a deodorization valve, and performing deodorization under a vacuum condition; (3) continuing raising the oil temperature of the deodorization device to 180 to 250 DEG C, and performing deodorization under the condition that the vacuum degree is controlled to be 0.65 to 1.3kPa, wherein the whole deodorization time is 2 to 5 hours; 3, cooling and filtering deodorized oil. The deodorized vegetable insulating oil is odorless, the acidity of the deodorized vegetable insulating oil is lower than 0.3 milligram of KOH per gram of oil, and smoking point of the deodorized vegetable insulating oil is higher than 220 DEG C, deodorization effects are achieved, and the environment is protected.
Description
Technical field
The present invention relates to vegetables oil and the dark refining art of transformer oil, especially relate to the deodorizing technology in the preparation of low acid number vegetable insulating oil.
Background technology
Vegetable insulating oil is high, pollution-free, high temperature resistant, the easy degraded of a kind of burning-point and the electrical strength environmental protection liquid dielectric suitable with mineral oil, is the ideal substitute of mineral insulating oil.Current plant type transformer oil has dropped in practical application, as " BIOTEMP " vegetables oil transformer of ABB, clean boot can run at-37.4 DEG C, the FR3 oil applied voltage grade of Cooper company, up to 242kV, runs more than ten years in 150,000 transformers." Ecoretrans " vegetables oil transformer of AE Pa Wa Co., Ltd. development is put into commercial operation.In China, State Grid Corporation of China, Southern Power Grid Company are proposed green network construction object, and the vegetable insulating oil substation transformer that First has an independent intellectual property right is hanging net operation in 2010.
The RBD oil manufacturing processed of University Of Chongqing's independent development is: after carrying out first alkali refining, desolventing technology to vegetables oil, then change alkali refining parameter, carry out secondary alkali refining and and deodorization process, then carry out three alkali refinings.The acid number of the vegetables oil after three alkali refinings is less than 0.03.Again by after three alkali refinings oil dehydration, add additive can obtain meet GB2536-1990 require low acid number transformer oil.Because vegetables oil itself has special taste, after desolventing technology, also have the smell of the aldehydes of trace, ketone, hydro carbons, low-molecular-weight fatty acid, the oxide compound of glyceryl ester and carclazyte, residual solvent, need to remove these bad smells and gaseous impurities.Meanwhile, in vegetable insulating oil, for oxidizing gas content requirement, comparatively common vegetable oil is more strict, therefore will improve on the deodorization process basis of traditional edible vegetable oil.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of water and the low vegetable insulating oil of foreign matter content improves treatment process.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the deodorizing technology in this low acid number vegetable insulating oil preparation, comprises the following steps,
Step one, deoxidation treatment is carried out to grease:
(1) the value vegetable insulating oil after secondary alkali refining is passed into deodorization device, intake is 60% ~ 70% of equipment cubic capacity, opens vacuum pump, closes vacuum valve, makes vacuum tightness maintain below-0.9Pa;
(2) maintain low temperature <70 DEG C of steam-stirring under vacuum, remove the oxygen in grease;
(3) through step (1) and (2), the oxygen in grease can be removed, then 130 DEG C are heated to vegetable insulating oil;
The effect of above-mentioned steps one is, grease deoxygenation can remove the oxygen be dissolved in grease, prevents the Oxidation of Fat and Oils in follow-up deodorising process;
Step 2, stripping deodorization is carried out to grease:
(1) in stripped vapor producer, pump into pure water, carry out 150 DEG C of heating, produce stripped vapor, stripped vapor consumption is that (t is oily h) for 30 ~ 50kg/;
(2) raise deodorization device oil temperature between 120 DEG C to 150 DEG C, open steam valve, stripped vapor is passed into deodorization device, thus form mist of oil, then open deodorization valve, carry out deodorization under vacuum;
(3) continue to raise between odor removing pot oil temperature to 180 DEG C ~ 250 DEG C, in the deodorization under 0.65 ~ 1.3kPa condition of control vacuum tightness, whole deodorization time is 2 to 5 hours;
Adopt above-mentioned steps, the stink substance remained in oil after can removing alkali refining and clay treatment, improve the smoke point of grease, free fatty acids, superoxide and degradation production thereof and thermo-sensitivity pigment can also be removed, the volatile decomposition thing of protein in the mildew and rot oil plant of removing, the polycyoalkane of removing small-molecular-weight;
Step 3, cold filtration is carried out to the grease after deodorization:
(1) deodorization grease can reclaim heat by the oil-oil heat exchanger in deodorization device to enter tank cold oil fat;
(2) after recovery heat, further grease is cooled under vacuum by watercooler, can filter by ingress of air after temperature is down to 60 DEG C.
This step 3 by the heat recovery and utilization of the grease and heating agent steam condensate that complete deodorising process, and then can reduce process cost, removes the impurity such as metallo-chelate simultaneously.
After above-mentioned deodorization process, vegetable insulating oil odorlessness, acid value is less than 0.3mg KOH/g oil and smoke point is greater than 220 DEG C, realizes deodorising effect, environmental protection.
Further improvement, in the small step of described step 2 (2), until in vapour generator vapor pressure to opening lower steam valve during 0.2 ~ 0.35MPa.
Further improvement, in the small step of described step 2 (2), forms mist of oil, open steam valve again, make the steam of ejection be contorted upper spray, oil is fully contacted with steam, open deodorization valve again, carry out deodorization under vacuum, odorous gas is discharged.
Further improvement, in the small step of described step 2 (3), continue to raise between odor removing pot oil temperature to 240 DEG C, in the deodorization under 0.8kPa condition of control vacuum tightness, whole deodorization time is 2 hours.
Further improvement, this vegetable insulating oil obtains through vegetable oil alkali refining, and described vegetables oil is one or more in rapeseed oil, soybean oil, sweet oil, sunflower seed oil, peanut oil, camellia seed oil and Oleum Gossypii semen.
Embodiment
For a better understanding of the present invention, be now described in detail of the present invention in conjunction with concrete preferred embodiment, should be appreciated that preferred embodiment only in order to the present invention is described, instead of in order to limit the scope of the invention.
Embodiment 1: the deodorizing technology in low acid number vegetable insulating oil preparation, vegetable insulating oil is rapeseed oil, comprises the following steps:
(1) vacuum pump is opened, close vacuum valve, by the rapeseed insulating oil after secondary alkali refining by vacuum pump suction deodorizing tank (deodorization device) from secondary alkali refining tank, intake is 60% of deodorizing tank cubic capacity, holding vacuum pump works, and makes vacuum tightness maintain below-0.9Pa;
Maintain low temperature under vacuum, ﹤ 70 DEG C of steam-stirrings, remove the oxygen in grease; Again 130 DEG C are heated to transformer oil;
(2) in stripped vapor producer, pure water is pumped into, carry out 150 DEG C of heating, produce stripped vapor, stripped vapor consumption is that (t is oily h) for 30 ~ 50kg/, until in vapour generator vapor pressure to opening lower steam valve during 0.2 ~ 0.35MPa, high-temperature steam is made to spray into deodorizing tank, form mist of oil, open steam valve again, make the steam of ejection be contorted upper spray, oil is fully contacted with steam, continue holding vacuum pump work, open deodorization valve again, carry out deodorization under vacuum, odorous gas is discharged;
3) state that vacuum pump work and deodorization valve are opened is kept, raise deodorizing tank temperature, make it arrival 240 DEG C, in the deodorization under 0.8kPa condition of control pressure, deodorization time is 2 hours, deodorization grease can reclaim heat by the oil-oil heat exchanger in deodorization device to enter tank cold oil fat, open cooling water valve after 2 hours, by watercooler, deodorizing tank is cooled 7 hours, can filter by ingress of air after internal temperature reaches 60 DEG C, namely deodorising process completes, and can enter subsequent processing;
4) after above-mentioned deodorization process, rapeseed insulating oil odorlessness, acid value is less than 0.3mg KOH/g oil and smoke point is greater than 220 DEG C, realizes deodorising effect.
Embodiment 2: the same with the step of embodiment 1, difference is, the vegetable insulating oil of employing is soybean oil, and after above-mentioned deodorization process, rapeseed insulating oil odorlessness, acid value is less than 0.3mg KOH/g oil and smoke point is greater than 220 DEG C, realizes deodorising effect.
Embodiment 3: the deodorizing technology in low acid number vegetable insulating oil preparation, vegetable insulating oil is rapeseed oil, comprises the following steps:
(1) vacuum pump is opened, close vacuum valve, by the rapeseed insulating oil after secondary alkali refining by vacuum pump suction deodorizing tank (deodorization device) from secondary alkali refining tank, intake is 70% of deodorizing tank cubic capacity, holding vacuum pump works, and makes vacuum tightness maintain below-0.9Pa;
Maintain low temperature under vacuum, ﹤ 70 DEG C of steam-stirrings, remove the oxygen in grease; Again 130 DEG C are heated to transformer oil;
(2) in stripped vapor producer, pure water is pumped into, carry out 150 DEG C of heating, produce stripped vapor, stripped vapor consumption is that (t is oily h) for 30 ~ 50kg/, until in vapour generator vapor pressure to opening lower steam valve during 0.2 ~ 0.35MPa, high-temperature steam is made to spray into deodorizing tank, form mist of oil, open steam valve again, make the steam of ejection be contorted upper spray, oil is fully contacted with steam, continue holding vacuum pump work, open deodorization valve again, carry out deodorization under vacuum, odorous gas is discharged;
(3) state that vacuum pump work and deodorization valve are opened is kept, raise deodorizing tank temperature, make it arrival 200 DEG C, in the deodorization under 1.2kPa condition of control pressure, deodorization time is 4 hours, deodorization grease can reclaim heat by the oil-oil heat exchanger in deodorization device to enter tank cold oil fat, open cooling water valve after 2 hours, by watercooler, deodorizing tank is cooled 7 hours, can filter by ingress of air after internal temperature reaches 60 DEG C, namely deodorising process completes, and can enter subsequent processing;
(4) after above-mentioned deodorization process, rapeseed insulating oil odorlessness, acid value is less than 0.3mg KOH/g oil and smoke point is greater than 225 DEG C, realizes deodorising effect.
Embodiment 4: the same with the step of embodiment 3, difference is, the vegetable insulating oil of employing is sweet oil, and after above-mentioned deodorization process, rapeseed insulating oil odorlessness, acid value is less than 0.3mg KOH/g oil and smoke point is greater than 220 DEG C, realizes deodorising effect.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (5)
1. the deodorizing technology in low acid number vegetable insulating oil preparation, comprises the following steps,
Step one, deoxidation treatment is carried out to grease:
(1) the value vegetable insulating oil after secondary alkali refining is passed into deodorization device, intake is 60% ~ 70% of equipment cubic capacity, opens vacuum pump, closes vacuum valve, makes vacuum tightness maintain below-0.9Pa;
(2) maintain low temperature <70 DEG C of steam-stirring under vacuum, remove the oxygen in grease;
(3) through step (1) and (2), the oxygen in grease can be removed, then 130 DEG C are heated to vegetable insulating oil;
Step 2, stripping deodorization is carried out to grease:
(1) in stripped vapor producer, pump into pure water, carry out 150 DEG C of heating, produce stripped vapor, stripped vapor consumption is that (t is oily h) for 30 ~ 50kg/;
(2) raise deodorization device oil temperature between 120 DEG C to 150 DEG C, open steam valve, stripped vapor is passed into deodorization device, thus form mist of oil, then open deodorization valve, carry out deodorization under vacuum;
(3) continue to raise between odor removing pot oil temperature to 180 DEG C ~ 250 DEG C, in the deodorization under 0.65 ~ 1.3kPa condition of control vacuum tightness, whole deodorization time is 2 to 5 hours;
Step 3, cold filtration is carried out to the grease after deodorization:
(1) deodorization grease can reclaim heat by the oil-oil heat exchanger in deodorization device to enter tank cold oil fat;
(2) after recovery heat, further grease is cooled under vacuum by watercooler, can filter by ingress of air after temperature is down to 60 DEG C.
2. the deodorizing technology in the low acid number vegetable insulating oil preparation according to right 1, is characterized in that, in the small step of described step 2 (2), until in vapour generator vapor pressure to opening lower steam valve during 0.2 ~ 0.35MPa.
3. the deodorizing technology in the low acid number vegetable insulating oil preparation according to right 2, it is characterized in that, in the small step of described step 2 (2), form mist of oil, then open steam valve, make the steam of ejection be contorted upper spray, oil is fully contacted with steam, open deodorization valve again, carry out deodorization under vacuum, odorous gas is discharged.
4. the deodorizing technology in the low acid number vegetable insulating oil preparation according to right 3, it is characterized in that, in the small step of described step 2 (3), continue to raise between odor removing pot oil temperature to 240 DEG C, in the deodorization under 0.8kPa condition of control vacuum tightness, whole deodorization time is 2 hours.
5. the deodorizing technology in the low acid number vegetable insulating oil preparation according to right 4, it is characterized in that, this vegetable insulating oil obtains through vegetable oil alkali refining, and described vegetables oil is one or more in rapeseed oil, soybean oil, sweet oil, sunflower seed oil, peanut oil, camellia seed oil and Oleum Gossypii semen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410528056.4A CN104263510A (en) | 2014-10-09 | 2014-10-09 | Deodorization process for preparation of low-acidity vegetable insulating oil |
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| CN201410528056.4A CN104263510A (en) | 2014-10-09 | 2014-10-09 | Deodorization process for preparation of low-acidity vegetable insulating oil |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106281675A (en) * | 2016-08-26 | 2017-01-04 | 重庆大学 | A kind of deodorizing technology in low acid number vegetable insulating oil preparation |
| CN112940854A (en) * | 2021-04-12 | 2021-06-11 | 华中农业大学 | Deodorization treatment process for edible oil |
| CN113528235A (en) * | 2020-04-22 | 2021-10-22 | 华中农业大学 | Deodorization process for steam distillation of ethanol of edible oil |
| CN113528237A (en) * | 2020-04-22 | 2021-10-22 | 华中农业大学 | Process for deodorizing edible oil by steam distillation with nonionic surfactant |
| CN114045186A (en) * | 2021-10-29 | 2022-02-15 | 广东电网有限责任公司广州供电局 | Illegal cooking oil base insulating oil and preparation method thereof |
| CN114657022A (en) * | 2022-03-23 | 2022-06-24 | 东北农业大学 | Deodorization method for improving quality of microalgae oil rich in DHA |
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|---|---|---|---|---|
| CN102517140A (en) * | 2011-12-15 | 2012-06-27 | 重庆大学 | Multiple alkali refining process for preparing low-acid value insulating oil by utilizing plant oil |
| CN102827675A (en) * | 2012-09-21 | 2012-12-19 | 西安卓源电力科技有限公司 | Method for preparing environment-friendly insulating oil by taking plant oil or recovered oil as raw materials |
| CN103013657A (en) * | 2012-11-27 | 2013-04-03 | 国网电力科学研究院武汉南瑞有限责任公司 | Two-step process deep deacidification method of vegetable electric insulating oil |
-
2014
- 2014-10-09 CN CN201410528056.4A patent/CN104263510A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517140A (en) * | 2011-12-15 | 2012-06-27 | 重庆大学 | Multiple alkali refining process for preparing low-acid value insulating oil by utilizing plant oil |
| CN102827675A (en) * | 2012-09-21 | 2012-12-19 | 西安卓源电力科技有限公司 | Method for preparing environment-friendly insulating oil by taking plant oil or recovered oil as raw materials |
| CN103013657A (en) * | 2012-11-27 | 2013-04-03 | 国网电力科学研究院武汉南瑞有限责任公司 | Two-step process deep deacidification method of vegetable electric insulating oil |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106281675A (en) * | 2016-08-26 | 2017-01-04 | 重庆大学 | A kind of deodorizing technology in low acid number vegetable insulating oil preparation |
| CN113528235A (en) * | 2020-04-22 | 2021-10-22 | 华中农业大学 | Deodorization process for steam distillation of ethanol of edible oil |
| CN113528237A (en) * | 2020-04-22 | 2021-10-22 | 华中农业大学 | Process for deodorizing edible oil by steam distillation with nonionic surfactant |
| CN112940854A (en) * | 2021-04-12 | 2021-06-11 | 华中农业大学 | Deodorization treatment process for edible oil |
| CN114045186A (en) * | 2021-10-29 | 2022-02-15 | 广东电网有限责任公司广州供电局 | Illegal cooking oil base insulating oil and preparation method thereof |
| CN114657022A (en) * | 2022-03-23 | 2022-06-24 | 东北农业大学 | Deodorization method for improving quality of microalgae oil rich in DHA |
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Application publication date: 20150107 |