CN107400560A - A kind of refining oil-tea camellia seed crude oil technique of low trans fatty acid increment - Google Patents
A kind of refining oil-tea camellia seed crude oil technique of low trans fatty acid increment Download PDFInfo
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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
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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
- C11B3/008—Refining fats or fatty oils by filtration, e.g. including ultra filtration, dialysis
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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
- C11B3/02—Refining fats or fatty oils by chemical reaction
- C11B3/04—Refining fats or fatty oils by chemical reaction with acids
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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
- C11B3/02—Refining fats or fatty oils by chemical reaction
- C11B3/06—Refining fats or fatty oils by chemical reaction with bases
-
- 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
- C11B3/10—Refining fats or fatty oils by adsorption
-
- 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
- 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
- C11B3/16—Refining fats or fatty oils by mechanical means
Abstract
A kind of refining oil-tea camellia seed crude oil technique of low trans fatty acid increment disclosed by the invention, is related to refining oil-tea camellia seed crude oil technical field, its refining process is as follows：(1), degumming；(2), alkali refining；(3), soap is taken off；(4), once wash；(5), secondary washing；(6), vacuum drying is used；(7), once decolourize；(8), secondary decolourization；(9), it is deodorized；(10), filter.There is to improve refining yield, to reduce production cost, Improving The Quality of Products, trans-fatty acid incremental amplitude smaller, be not only suitable for producing tea seed refined oil, it can also be used to produce other plant refined oils.
Description
Technical field
The present invention relates to refining oil-tea camellia seed crude oil technical field, particularly a kind of tea seed hair of low trans fatty acid increment
Olein sweetening process.
Background technology
Oil tea is Theaceae Camellia Plants, is one of four big woody oil tree species of the world, is the distinctive seeds in China, special
It is not adapted to, in the plantation of the mountain area hills of red earth area, not strive ground with grain, be the woody edible oil material crop being worthy to be popularized.Tea seed
The camellia seed oil squeezed is a kind of high quality food oil, has important healthcare function, and FAO (Food and Agriculture Organization of the United Nation) has been classified as weight
Select the advanced edible vegetable oil of health type promoted.Trans-fatty acid means that (conjugation is double containing one or several anti-configuration double bonds
Except key) unrighted acid, mainly by refining etc. working process when high temperature link fatty acid structure isomerization after produced by.
The food-safety problem of the trans-fatty acid in edible oil attracts attention in recent years, and research shows, instead
Formula aliphatic acid has certain harm to health, such as increases cardiovascular and cerebrovascular, diabetes and cancer risk, influences children
Normal growth and development.It is successively clear and definite that many countries make the state such as clear stipulaties, Denmark, Canada to the trans-fatty acid in food
Provide that content of trans fatty acids is no more than 2% in commercially available edible oil, China is also not known to edible vegetable oil and provided at present.
In camellia seed oil processing industry, oil-tea camellia seed crude oil is because color and luster is deep, pigment easily solidifies, phosphatide is high, acid value is high, peroxide
The characteristics of change value is high causes refining difficulty big.The camellia seed oil that normal refinery activities are produced, its color and luster, acid value, peroxidating
Though value, smoke point can meet the requirement of national standard, content of trans fatty acids is 4% or so, thus, how in refining process both
Harmful and unhelpful impurity can be effectively removed, and can ensures that trans-fatty acid increment is low in refining process, is tea oil processing
The a great problem of industry.
Chinese patent (Application No. 201610339317.7) is disclosed, and " one kind reduces content of trans fatty acids and removes modeling
The edible oil processing technology of agent ", bleached oil is filtered and then by deacid-deodoring, the de- modeling of one-level, the de- modeling of two level, fat first
The product oil plasticiser index that the step of acid and plasticiser trapping processing, product oil cooling, filtering produces is less than national standard,
Wherein DBP≤0.04ppm, DEHP≤0.4ppm, trans-fatty acid rising value ＜ 0.5%.The processing technology of the present invention is removing
While plasticiser, suppress the formation of trans-fatty acid, reduce the content of trans-fatty acid.
A kind of and for example " essence of low trans fatty acid compound oil disclosed in Chinese patent (Application No. 201510341958.1)
Smelting method ", according to formula by each feedstock oil in nutrition compound oil by corresponding ratio progress it is compound, then by aquation degumming →
The refining procedures such as depickling → decolouring → deodorization → dewaxing → degreasing → filtering → nitrogen-filled packaging, in the refining process, deodorization step
Rapid temperature control is maintained at 0~10mmbar in 210~225 DEG C, vacuum, and deodorization time is 15~20 minutes, so as to ensure
Trans-fatty acid is less than 1% in finished product, and indices meet the national standard one-level oil standard of corresponding oil product.
Another Chinese patent (Application No. 201010205319.X) is disclosed, and " one kind is compared with low trans fatty acid food plant
Oil and its method of refining ", the vegetable oil is the ready-mixed oil of rapeseed oil, soybean oil, corn oil or its any ratio, in the vegetable oil
Middle content of trans fatty acids≤1wt%, and oil and fat smoke point >=210 DEG C.Its method of refining includes crude oil → degumming → depickling → de-
Soap → dehydration → decolouring → removing impurities → deoxidation → deodorization → cooling → finished product, feature are that impurity is deviate from granularity from 25 by decolouring section
μm 10 μm are dropped to, controlled deodorization temperature between 230-245 DEG C in deodorization stage, vacuum control is within 2 τ.
Technology contents
Refining yield can be improved it is an object of the invention to provide one kind, reduce production cost, Improving The Quality of Products, trans
The less refining oil-tea camellia seed crude oil technique of aliphatic acid incremental amplitude.
For achieving the above object, the technical solution used in the present invention is a kind of low trans fatty acid increment of invention
Refining oil-tea camellia seed crude oil technique, its refining process are as follows：
(1), degumming：Oil-tea camellia seed crude oil is heated to 85 degrees Celsius, add account for oil-tea camellia seed crude oil total amount 0.10-0.15%,
Concentration is 80-90% phosphoric acid, and is mixed by force through high shear homogeneous micron order blender, and acid reaction tank is entered after mixing, controls
The relieving haperacidity reaction time, temperature control obtained degumming camellia seed oil at 85 DEG C, standby in more than 70min；
(2), alkali refining：Degumming camellia seed oil is entered in Hi-mixer and mixed with NaOH solution, it is anti-subsequently into alkali
Tank stirring reaction is answered, at 60-65 DEG C, the reaction time is that 15-25min obtains alkali refining camellia seed oil, standby for reaction temperature control；
In above-mentioned alkali refining process, caustic dosage is according to formula：1 × 0.713 × Q/1000 is calculated, and Q is crude oil flow T/h, alkali
Liquid concentration is determined according to the acid value of oil-tea camellia seed crude oil, NaOH solution of the acid value below 2mgKOH/g 12 Baume degrees chosen below,
NaOH solution of the acid value in 2-4mgKOH/g selection 12-16 Baume degrees；
(3), soap is taken off：Alkali refining camellia seed oil is inserted into de- soap centrifuge (centrifuge speed is 5000-10000 revs/min)
In, contained phosphatide and soap stock are removed, depickling is obtained and takes off soap oil tea-seed oil, it is standby；
(4), once wash：Added into de- soap oil tea-seed oil weight concentration be 0.1-0.2%, dosage be de- soap oil tea seed
(it is further to be completely converted into non-hydratable phospholipid therein to add phosphate aqueous solution to the 3-8% of oil volume phosphate aqueous solution
Hydrated phospholipid, it is easy to chelated metal ions, is advantageous to remove residual soap), mixed at being 50-70 DEG C in temperature through multiple-effect blender
Afterwards, into 10-30min is reacted in retort, subsequently into washing centrifuge removing washing point, (described washing is divided into aquation phosphorus
Fat), remaining soap and remaining phosphorus, obtain and once wash camellia seed oil (the remaining soap once washed in camellia seed oil is less than 20ppm, contains
Phosphorus is less than 5ppm), it is standby；
(5), secondary washing：The hot soft water that temperature is 70-90 DEG C is added to once washing in camellia seed oil, dosage is once
Wash the 5-15% of camellia seed oil volume, mix and wash through multiple-effect blender, into water washing tank (temporary), enter afterwards wash from
Scheming removing washing point (washing point in this step is hydrated phospholipid and free acid), remaining soap and remaining phosphorus, obtain secondary washing
Camellia seed oil (free acid content in secondary water washing oil tea-seed oil is less than 0.1%, and residual soap is less than 5ppm, phosphorous to be less than 5ppm),
It is standby；
(6), it is dried in vacuo：Secondary water washing oil tea-seed oil is dried in vacuo (vacuum degree control into precipitation drying chamber
For-0.07-- 0.09Mpa), dry camellia seed oil (moisture for drying camellia seed oil is less than 0.1%) is obtained, it is standby；
(7), once decolourize：Camellia seed oil will be dried and be heated to 95-105 DEG C, subsequently into buffer in pre- bleacher,
Squeezed into again by pump and a decolorization filtering is carried out in leaf filter, according to adsorption equilibrium principle, make the vane type mistake after decolouring
Carclazyte filter cake and the deeper drying camellia seed oil of color and luster in filter reach second adsorption balance, and (now, filter pressure reaches
2MPa), the camellia seed oil that once decolourizes is obtained, it is standby；
(8), secondary decolourization：Camellia seed oil will once be decolourized into carclazyte premixing tank, carclazyte is quantitatively adding, is stirred
After uniformly, secondary decolourization is carried out into bleaching tower；During secondary decolourization, it is stirred with saturated vapor, controls secondary decolourization
Temperature is in 100-110 DEG C, bleaching time 20-40min, decolouring vacuum pressure in-0.05-- 0.07MPa, the carclazyte being quantitatively adding
Usage amount is 2-4kg/T oil；Then, leaf filter filtering (after forming filter cake, filter effect is formed by filter cake) is squeezed into, is obtained
Decolouring camellia seed oil, it is standby；
(9), it is deodorized：Enter deodorizing tower top layer after decolouring camellia seed oil is heated into 200 DEG C for the first time, then through being built in deodorization
The steam(-)coil of tower top layer is heated to 226-228 DEG C, then, sequentially enters packed tower, plate column is deodorized (specific mistake
Cheng Wei：226-228 DEG C of decolouring camellia seed oil enters fast eliminating in depickling packed tower from the top overflow of deodorizing tower and dissociated
The volatile components such as aliphatic acid, enter back into board-like retention layer and be deodorized), deodorization time is controlled in 60-80min, deodorization temperature control
For system at 226-228 DEG C, deodorization Stress control obtains deodorization camellia seed oil in -0.06--0.08MPa, standby；
(10), filter：Deodorization camellia seed oil is passed through into cooling, secondary filter, gets product camellia seed oil.
In a decolorization process, the heating for drying camellia seed oil is heated using oily oil heat exchanger, i.e.,:With deodorised oil
Tea-seed oil is exchanged heat；It is first to drive to be heated by steam heater.
In the secondary decolourization step, the filtering of the camellia seed oil after decolouring includes leaf filter filtering and precision
Filter filters two steps, and (leaf filter filtering is after filter cake is formed, and filter effect is formed by filter cake；Accurate filter makes
With bag filter, filter bag：Polyester, filter opening aperture are 8-15 microns).
In the deodorising step, first heating is heated using Falling film heat transfer device, i.e.,：Decolouring camellia seed oil is entered into falling liquid film
The high temperature deodorization camellia seed oil come out in the shell side and tube side of heat exchanger from deodorizing tower is exchanged heat.
In a water-washing step, the weight concentration of phosphate aqueous solution is 0.15%, dosage is that depickling takes off soap oil tea-seed oil
The 5% of volume, temperature are 60 DEG C, reaction time 20min.
In secondary water-washing step, the temperature of hot soft water is 80 DEG C, and dosage is the 10% of once washing camellia seed oil volume.
In a decolorization process, dry camellia seed oil and be heated to 100 DEG C.
In secondary decolourization step, control secondary decolourization temperature controls in 105 DEG C, bleaching time 30min, vacuum pressure
In -0.06MPa, carclazyte usage amount is 3kg/T oil.
In deodorising step, in 70min, deodorization temperature is controlled at 227 DEG C for deodorization time control, deodorization vacuum control-
0.07MPa.
The refining oil-tea camellia seed crude oil technique of the low trans fatty acid increment of the present invention, takes washing process twice and takes off twice
Color technique, the impurity such as phosphatide in grease, residual soap, pigment, free fatty can be removed to greatest extent, to reduce deodorization temperature
Degree, shortening deodorization time create favorable conditions；Due to low temperature, in short-term it is deodorized, thus, energy consumption can be reduced, and trans fats can be made
Sour incremental amplitude is smaller, and then improves product quality.Meanwhile during secondary decolourization, be stirred using saturated vapor,
The decolorizing efficiency of atlapulgite is added, so as to reduce Clay consumption, improve yield, reduction solid slag discharge.
Experiment shows that the carclazyte dosage of common process is 4.5 kgs/tonne of oil, and carclazyte dosage of the invention is 3 kgs/tonne
Oil, 1.5 kilograms of carclazyte can be saved by often producing one ton of oil product, and the spent bleaching clay oil-containing after decolouring is 30%, that is, producing one ton of oil product can
Save 1.5*30%=0.5 kilograms of oil product.And the more conventional technique of content of trans fatty acids reduces more (conventional work after secondary decolourization
Skill bleached oil reduces by 0.07% compared with crude oil, 0.19%) this technique bleached oil reduces compared with crude oil.
Embodiment
With reference to embodiments, the present invention is further illustrated.Following explanation is but this hair in a manner of enumerating
Bright protection domain is not limited thereto.
The refining oil-tea camellia seed crude oil technique of the low trans fatty acid increment of the present embodiment, its preparation process are as follows：
(1), stock up：Learnt from else's experience the tea seed hair after bag filter (polyester bag filter, aperture be 50 microns) filtering
Oil, its quality index are：Acid value (mg/g) 1.5, peroxide value (mmol/kg) 4.5, insoluble impurities 0.12% and are waved moisture
Stimulating food 0.16%, content of trans fatty acids 0.43% are standby；
(2), degumming：Oil-tea camellia seed crude oil is heated to 85 degrees Celsius by oil-tea camellia seed crude oil, addition accounts for oil-tea camellia seed crude oil total amount
0.12%th, weight concentration is 85% phosphoric acid, and is mixed by force through high shear homogeneous micron order blender, and it is anti-that acid is entered after mixing
Tank is answered, the control acid reaction time, temperature control obtained degumming camellia seed oil at 85 DEG C, standby in more than 70min；
(3), alkali refining：Degumming camellia seed oil is mixed into Hi-mixer with NaOH solution, reacted subsequently into alkali
Tank stirring reaction, reaction temperature are controlled at 62 DEG C, reaction time 20min, obtain alkali refining camellia seed oil, standby；
In above-mentioned alkali refining process, caustic dosage is according to formula：1 × 0.713 × Q/1000 is calculated, and Q is crude oil flow T/h, alkali
Liquid concentration is determined according to the acid value of oil-tea camellia seed crude oil, NaOH solution of the acid value below 2mgKOH/g 12 Baume degrees chosen below；
In the NaOH solution of 2-4mgKOH/g selection 12-16 Baume degrees, (acid value selects the NaOH of 14 Baume degrees molten to acid value in 3mgKOH/g
Liquid)；
(4), soap is taken off：Alkali refining camellia seed oil is inserted into de- soap centrifuge (centrifuge speed is 6600 revs/min), removing
Contained soap stock (including contained phosphatide), obtains de- soap oil tea-seed oil, standby；
(5), once wash：Added into de- soap oil tea-seed oil weight concentration be 0.15%, dosage be de- soap oil tea seed oil body
(it is that non-hydratable phospholipid therein further is completely converted into aquation phosphorus to add phosphate aqueous solution to 6% long-pending phosphate aqueous solution
Fat, it is easy to chelated metal ions, is advantageous to remove residual soap), at being 60 DEG C in temperature after the mixing of multiple-effect blender, into reaction
20min is reacted in tank, subsequently into washing centrifuge removing washing point (described washing is divided into hydrated phospholipid), remaining soap and residual
Phosphorus is deposited, obtains and once washes camellia seed oil (the remaining soap once washed in camellia seed oil is less than 20ppm, phosphorous to be less than 5ppm), it is standby
With；
(6), secondary washing：The hot soft water that temperature is 80 DEG C is added to once washing in camellia seed oil, dosage is once to wash
The 10% of camellia seed oil volume, mix and wash through multiple-effect blender, into water washing tank (temporary), taken off afterwards into washing centrifuge
Except washing point (washing point in this step is hydrated phospholipid and free acid), remaining soap and remaining phosphorus, secondary water washing oil tea seed is obtained
Oil (free acid content in secondary water washing oil tea-seed oil is less than 0.1%, and residual soap is less than 5ppm, phosphorous to be less than 5ppm), it is standby；
(7), it is dried in vacuo：Secondary water washing oil tea-seed oil is dried in vacuo (vacuum degree control into precipitation drying chamber
For -0.08Mpa), dry camellia seed oil (moisture for drying camellia seed oil is less than 0.1%) is obtained, it is standby；
(8), once decolourize：Camellia seed oil will be dried and be heated to 100 DEG C, subsequently into buffer in pre- bleacher, then by
Pump, which is squeezed into, carries out a decolorization filtering in leaf filter, according to adsorption equilibrium principle, make the leaf filter after decolouring
Interior carclazyte filter cake reaches second adsorption balance (now, filter pressure reaches 2MPa) with the deeper drying camellia seed oil of color and luster,
The camellia seed oil that once decolourizes is obtained, it is standby；
(9), secondary decolourization：Camellia seed oil will once be decolourized into carclazyte premixing tank, carclazyte is quantitatively adding, is stirred
After uniformly, secondary decolourization is carried out into bleaching tower；During secondary decolourization, it is stirred with saturated vapor, controls secondary decolourization
For temperature in 105 DEG C, bleaching time 30min, decolouring vacuum pressure in -0.06MPa, the carclazyte usage amount being quantitatively adding is 3kg/T
Oil；Then, leaf filter filtering (after forming filter cake, filter effect is formed by filter cake) is squeezed into, obtains decolouring camellia seed oil, it is standby
With；
(10), it is deodorized：Enter deodorizing tower top layer after decolouring camellia seed oil is heated into 200 DEG C for the first time, then through being built in deodorization
The steam(-)coil of tower top layer is heated to 227 DEG C, then, sequentially enters packed tower, plate column is deodorized (detailed process
For：227 DEG C of decolouring camellia seed oil enters fast eliminating free fatty in depickling packed tower from the top overflow of deodorizing tower
Deng volatile component, enter back into board-like retention layer and be deodorized), deodorization time control is controlled at 227 DEG C in 70min, deodorization temperature,
Stress control is deodorized in -0.07MPa, obtains deodorization camellia seed oil, it is standby；
(11), filter：Deodorization camellia seed oil is got product into (low trans fatty acid) tea seed by cooling, secondary filter
Oil.
Following table 1 is the refining oil-tea camellia seed crude oil technique and normal refinery activities of the low trans fatty acid increment of the present invention
The contrast of the key technical indexes of product after processing.Oil-tea camellia seed crude oil quality condition used in it：Acid value (mgKOH/g) 2.5,
Peroxide value (mmol/kg) 4.5, insoluble impurities 0.12%, moisture and volatile matter content 0.16%, content of trans fatty acids
0.43%.
Table 1
The contrast table of the key technical indexes
The refining oil-tea camellia seed crude oil technique of the low trans fatty acid increment of the present invention, it is not only suitable for producing tea seed refining
Oil, it can also be used to produce other plant refined oils.
Claims (9)
1. a kind of refining oil-tea camellia seed crude oil technique of low trans fatty acid increment, it is characterised in that refining process is as follows：
(1), degumming：Oil-tea camellia seed crude oil is heated to 85 degrees Celsius, adds 0.10-0.15%, the concentration for accounting for oil-tea camellia seed crude oil total amount
For 80-90% phosphoric acid, and mixed by force through high shear homogeneous micron order blender, acid reaction tank, control acid are entered after mixing
Reaction time, temperature control obtained degumming camellia seed oil at 85 DEG C, standby in more than 70min；
(2), alkali refining：Degumming camellia seed oil is entered in Hi-mixer and mixed with NaOH solution, subsequently into alkali retort
Stirring reaction, reaction temperature are controlled at 60-65 DEG C, reaction time 15-25min, obtain alkali refining camellia seed oil, standby；
In above-mentioned alkali refining process, caustic dosage is according to formula：1 × 0.713 × Q/1000 is calculated, and Q is crude oil flow T/h, and alkali lye is dense
Degree is determined according to the acid value of oil-tea camellia seed crude oil, NaOH solution of the acid value below 2mgKOH/g 12 Baume degrees chosen below, acid value
In the NaOH solution of 2-4mgKOH/g selection 12-16 Baume degrees；
(3), soap is taken off：Alkali refining camellia seed oil is inserted in de- soap centrifuge, contained soap stock is removed, obtains de- soap oil tea-seed oil, it is standby
With；
(4), once wash：Added into de- soap oil tea-seed oil weight concentration be 0.1-0.2%, dosage be de- soap oil tea seed oil body
Product 3-8% phosphate aqueous solution, at being 50-70 DEG C in temperature after the mixing of multiple-effect blender, react 10- into retort
30min, subsequently into washing centrifuge removing washing point, remaining soap and remaining phosphorus, obtain and once wash camellia seed oil, it is standby；
(5), secondary washing：The hot soft water that temperature is 70-90 DEG C is added to once washing in camellia seed oil, dosage is once to wash
The 5-15% of camellia seed oil volume, mix and wash through multiple-effect blender, into water washing tank, enter washing centrifuge removing water afterwards
Wash point, remaining soap and remaining phosphorus, obtain secondary water washing oil tea-seed oil, it is standby；
(6), it is dried in vacuo：Secondary water washing oil tea-seed oil is dried in vacuo into precipitation drying chamber, obtains dry camellia seed oil,
It is standby；
(7), once decolourize：Camellia seed oil will be dried and be heated to 95-105 DEG C, subsequently into buffer in pre- bleacher, then by
Pump, which is squeezed into, carries out a decolorization filtering in leaf filter, according to adsorption equilibrium principle, make the leaf filter after decolouring
Interior carclazyte filter cake reaches second adsorption balance with the deeper drying camellia seed oil of color and luster, produces the camellia seed oil that once decolourizes, standby
With；
(8), secondary decolourization：Camellia seed oil will once be decolourized into carclazyte premixing tank, carclazyte is quantitatively adding, is uniformly mixed
Afterwards, secondary decolourization is carried out into bleaching tower；During secondary decolourization, it is stirred with saturated vapor, controls secondary decolourization temperature
Used in 100-110 DEG C, bleaching time 20-40min, decolouring vacuum pressure in-0.05-- 0.07MPa, the carclazyte being quantitatively adding
Measure as 2-4kg/T oil；Then, leaf filter filtering is squeezed into, obtains decolouring camellia seed oil, it is standby；
(9), it is deodorized：Enter deodorizing tower top layer after decolouring camellia seed oil is heated into 200 DEG C for the first time, then through being built in deodorization tower top
The steam(-)coil of layer is heated to 226-228 DEG C, then, sequentially enters packed tower, plate column is deodorized, deodorization time control
In 60-80min, deodorization temperature controls at 226-228 DEG C system, and deodorization vacuum control must be deodorized oil tea in -0.06--0.08MPa
Seed oil, it is standby；
(10), filter：Deodorization camellia seed oil is passed through into cooling, secondary filter, gets product camellia seed oil.
2. the refining oil-tea camellia seed crude oil technique of low trans fatty acid increment according to claim 1, it is characterised in that：Described
In decolorization process, the heating for drying camellia seed oil is heated using oily oil heat exchanger, i.e.,:Changed with deodorization camellia seed oil
Heat；It is first to drive to be heated by steam heater.
3. the refining oil-tea camellia seed crude oil technique of low trans fatty acid increment according to claim 1, it is characterised in that：Described
In secondary decolourization step, the filtering of the camellia seed oil after decolouring includes leaf filter filtering and accurate filter filtering two
Step.
4. the refining oil-tea camellia seed crude oil technique of low trans fatty acid increment according to claim 1, it is characterised in that：Described
In deodorising step, first heating is heated using Falling film heat transfer device, i.e.,：By decolouring camellia seed oil enter Falling film heat transfer device shell side with
The high temperature deodorization camellia seed oil come out in tube side from deodorizing tower is exchanged heat.
5. the refining oil-tea camellia seed crude oil technique of low trans fatty acid increment according to claim 1, it is characterised in that：Once
In water-washing step, the weight concentration of phosphate aqueous solution is 0.15%, dosage is that depickling takes off the 5% of soap oil tea seed oil volume, temperature
For 60 DEG C, reaction time 20min.
6. the refining oil-tea camellia seed crude oil technique of low trans fatty acid increment according to claim 1, it is characterised in that：Secondary
In water-washing step, the temperature of hot soft water is 80 DEG C, and dosage is the 10% of once washing camellia seed oil volume.
7. the refining oil-tea camellia seed crude oil technique of low trans fatty acid increment according to claim 1, it is characterised in that：Once
In decolorization process, dry camellia seed oil and be heated to 100 DEG C.
8. the refining oil-tea camellia seed crude oil technique of low trans fatty acid increment according to claim 1, it is characterised in that：Secondary
In decolorization process, control secondary decolourization temperature is in 105 DEG C, bleaching time 30min, vacuum pressure control in -0.06MPa, carclazyte
Usage amount is 3kg/T oil.
9. the refining oil-tea camellia seed crude oil technique of low trans fatty acid increment according to claim 1, it is characterised in that：It is being deodorized
In step, deodorization time control is controlled at 227 DEG C in 70min, deodorization temperature, and deodorization vacuum control is in -0.07MPa.
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