CN109234009A - The crude oil method of purification of edible oil - Google Patents
The crude oil method of purification of edible oil Download PDFInfo
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- CN109234009A CN109234009A CN201811409185.6A CN201811409185A CN109234009A CN 109234009 A CN109234009 A CN 109234009A CN 201811409185 A CN201811409185 A CN 201811409185A CN 109234009 A CN109234009 A CN 109234009A
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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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Abstract
A kind of method of purification of edible crude oil, crude oil is added in carclazyte slurries, it is at the uniform velocity stirred under the conditions of 80~100 DEG C of temperature, it is sufficiently mixed crude oil with carclazyte slurries, it stands under constant temperature conditions, the impurity in crude oil is separated, the harmful substances such as phosphatide, saponin, pigment and the aflatoxins in grease are removed；In 250 DEG C of high temperature heat transfer tower, carry out high temperature dehydration, depickling, can by crude oil moisture and free fatty acid remove；It using cooling water, stands crude oil under 0~6 DEG C of constant temperature, carries out low-temperature precipitation, the part palmitin in crude oil can be removed；It is intermittently passed through nitrogen into purifying tank, low temperature purification is carried out under -6~0 DEG C of cryogenic conditions, wax and oil liquid in oil liquid can be made to efficiently separate, and removes wax by vacuum filter under conditions of 0~4 DEG C, obtains processed edible oil.
Description
Technical field
The present invention relates to edible oil processing technique field more particularly to a kind of crude oil methods of purification of edible oil.
Background technique
Edible oil is also referred to as " edible oil ", refers to and is making used in food products, animal or vegetable fat.Due to original
Expect that reasons, the common edible oils such as source, processing technology and quality are mostly vegetable fat, including Semen setariae oil, rapeseed oil, peanut
Oil, fiery sesame oil, corn oil, olive oil, camellia oil, palm oil, canola oil, sunflower oil, soybean oil, sesame oil, linseed
Oily (siritch), grape seed oil, walnut oil, peony seed oil etc..
Due to containing the impurity such as suspended impurity, peptized impurities, oil soluble impurity, moisture content in crude oil, wherein peptization is miscellaneous
The presence of matter, oil soluble impurity keeps grease hydrolysis rancid, extremely harmful to human body, and there are also carcinogenesises to human body for partial impurities.
Therefore it needs just become edible edible oil after carrying out crude oil purification refining, in existing edible fat production technology,
It is not high for the purification rate of crude oil, cause not only to influence the food of processed edible oil still containing some impurity in processed edible oil
With quality, also it is unfavorable for the storage of processed edible oil.
Summary of the invention
In view of this, it is necessary to provide a kind of crude oil methods of purification of edible oil.
A kind of crude oil method of purification of edible oil, comprising the following steps:
(1) preliminary purification: prepared carclazyte slurries and crude oil are injected in blending tank according to the ratio of 10:1 to 30:1,
Under the conditions of keeping 80~100 DEG C of temperature, 30min is stirred at the uniform velocity with the revolving speed of 25~30 turns/min, it, will after the completion of being stirred
The mixed liquor that carclazyte slurries and crude oil are formed naturally cools to 30~40 DEG C, and stands 72h under 30~40 DEG C of constant temperature,
The suspended particulate impurity in crude oil is separated, phosphatide, saponin, pigment and aflatoxins in grease is removed, obtains bleached oil；
(2) high temperature dehydration, depickling: the bleached oil after preliminary purification in step (1) is delivered in high temperature heat transfer tower, is stirred on one side
It mixes, on one side slowly heating, heating rate is controlled in 5~7 DEG C/min, when temperature rises to 250 DEG C, keeps 250 DEG C of constant temperature item
Under part, 80~100min, moisture and free-fat in removal decoloration crude oil are stirred at the uniform velocity with the revolving speed of 15~20 turns/min
Acid obtains dehydrated oil；
(3) preliminary low temperature removal of impurities: the dehydrated oil in step (2) is delivered in settling tank, even with the revolving speed of 20~30 turns/min
Speed stirring, and after the temperature of dehydrated oil is cooled to 0~6 DEG C using 0~5 DEG C of cooling water, stop stirring, keeps in settling tank
Temperature be in 0~6 DEG C of constant temperature, and dehydrated oil is made to stand 48h, the palmitin in dehydrated oil is made to crystallize analysis from dehydrated oil
Out, the palmitin and dehydrated oil for crystallizing precipitation are layered, and lower layer is precipitated impurities, and upper layer is crude oil liquid, and the crude oil liquid on upper layer is taken out
Out；
(4) thick oil filtrating: the crude oil liquid extracted out in step (3) is delivered in primary filtration tank, by 800-1200 purpose
Horizontal filter filtering obtains oil liquid after the impurity removal in crude oil liquid；
(5) secondary low temperature purification: the oil liquid obtained after filtering in step (4) is delivered in purifying tank, from the bottom of purifying tank
- 10~-5 DEG C of nitrogen is passed through in the oil liquid into purifying tank by delivery pipe, successively cooling is carried out from top to bottom to oil liquid, is made
Successively crystallization is precipitated wax in oil liquid from oil liquid, and the constant temperature for keeping the temperature of the oil liquid in purifying tank to be in -6~0 DEG C
Condition stands 10~20h, and the wax and oil liquid that crystallization is precipitated are layered, and lower layer is precipitated impurities, and upper layer is purification oil liquid, and
The purification oil liquid on upper layer is extracted out；
(6) it purifies oil liquid filter at low temperature: the purification oil liquid extracted out in step (5) being delivered in filter at low temperature tank, at 0~4 DEG C
Under conditions of carry out vacuum filter, will purify oil liquid in impurity removal, obtain processed edible oil.
The present invention by adopting the above technical scheme, the beneficial effect is that: the present invention utilizes crude oil being added to carclazyte slurries
In, 30min is at the uniform velocity stirred under the conditions of 80~100 DEG C of temperature, is sufficiently mixed crude oil with carclazyte slurries, and at 30~40 DEG C
Constant temperature under stand 72h, separate the suspended particulate impurity in crude oil, remove phosphatide in grease, saponin, pigment and yellow bent
Mycin obtains decoloration crude oil；Under 250 DEG C of constant temperature, revolving speed at the uniform velocity stirs 80~100min, carries out high temperature dehydration, takes off
Acid, can by decolourize crude oil in moisture and free fatty acid remove；Using cooling water, crude oil is made to be cooled to 0~6 from 250 DEG C
DEG C, and 48h is stood under 0~6 DEG C of constant temperature, low-temperature precipitation is carried out, the palmitin in crude oil can be removed, obtain crude oil
Liquid；It is intermittently passed through nitrogen into purifying tank, low temperature secondary purification is carried out to the oil liquid in purifying tank, keeps the temperature in purifying tank
It is maintained at -6~0 DEG C, and stands 10~20h under -6~0 DEG C of cryogenic conditions, wax in oil liquid and oil liquid can be made effective
Separation, and remove wax by vacuum filter under conditions of 0~4 DEG C, obtains processed edible oil, at the same using nitrogen atmosphere come
Reduce the purification of secondary low temperature, in purification oil liquid filter at low temperature air to the oxidation of edible oil (for example, the α-in linseed edible oil
Linolenic acid).The crude oil method of purification decoloration of edible oil of the present invention, good impurity removing effect, can be effectively reduced in processed edible oil
Impurity content improves the edible quality of processed edible oil, is conducive to the storage of processed edible oil.
Detailed description of the invention
Fig. 1 is the peace of the first nitrogen dispersion pipe, the second nitrogen dispersion pipe, third nitrogen dispersion pipe of the invention in purifying tank
Fill schematic diagram.
In figure: the first nitrogen dispersion pipe 10, the second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30, stomata 40, nitrogen
Delivery pipe 50, purifying tank 60.
Specific embodiment
It is clear in order to be more clear the purpose of the present invention, technical solution and advantageous effects, below in conjunction with attached drawing and
Specific embodiment, the present invention will be described in further detail.It should be understood that specific implementation described in this specification
Mode is not intended to limit the present invention just for the sake of explaining the present invention.
Embodiment 1:
The preparation of carclazyte slurries: 35% carclazyte is slowly added into 65% 60 DEG C of hot water, is slowly at the uniform velocity stirred, and make carclazyte
90 DEG C are to slowly warm up to 2 DEG C/min heating rate with the mixed liquor of water, so that carclazyte be made to be sufficiently mixed with water, carclazyte slurry is made
Liquid；
Preliminary purification: prepared carclazyte slurries and crude oil are injected in blending tank according to the ratio of 10:1, and holding 80~
Under the conditions of 100 DEG C of temperature, 30min is stirred at the uniform velocity with the revolving speed of 25 turns/min, after the completion of being stirred, by carclazyte slurries and hair
The mixed liquor that oil is formed naturally cools to 30 DEG C, and 72h is stood under 30 DEG C of constant temperature, separates the suspended particulate in crude oil
Impurity removes phosphatide, saponin, pigment and aflatoxins in grease, obtains bleached oil；
High temperature dehydration, depickling, depickling: the bleached oil after preliminary purification in step (1) is delivered in high temperature heat transfer tower, is stirred on one side
It mixes, on one side slowly heating, heating rate is controlled in 5 DEG C/min, when temperature rises to 250 DEG C, keeps 250 DEG C of constant temperature
Under, 80min is stirred at the uniform velocity with the revolving speed of 15 turns/min, moisture and free fatty acid in removal decoloration crude oil are dehydrated
Oil；
Preliminary low temperature removal of impurities: dehydration crude oil obtained in step (2) is delivered in settling tank, at the uniform velocity with the revolving speed of 20 turns/min
Stirring, and after the temperature for being dehydrated crude oil is cooled to 0~6 DEG C using 0~5 DEG C of cooling water, stop stirring, keeps in settling tank
Temperature be in 0~6 DEG C of constant temperature, and make to be dehydrated crude oil and stand 48h, make the palmitin being dehydrated in crude oil from dehydration crude oil
Crystallization is precipitated, and crystallizes palmitin and the dehydration crude oil layering of precipitation, and lower layer is precipitated impurities, and upper layer is crude oil liquid, and by upper layer
The extraction of crude oil liquid；
Thick oil filtrating: the crude oil liquid extracted out in step (3) is delivered in primary filtration tank, horizontal by 800-1200 purpose
Filter filtering obtains oil liquid after the impurity removal in crude oil liquid；
(5) secondary low temperature purification: the oil liquid obtained after filtering in step (4) is delivered in purifying tank 60, from purifying tank 60
Bottom is passed through -10~-5 DEG C of nitrogen by delivery pipe in the oil liquid into purifying tank 60, carry out to oil liquid layer-by-layer from top to bottom
Cooling, making the wax in oil liquid, successively crystallization is precipitated from oil liquid, and the temperature of the oil liquid in purifying tank 60 is kept to be in -6~0
DEG C constant temperature, stand 10~20h, the wax and oil liquid that crystallization is precipitated are layered, and lower layer is precipitated impurities, and upper layer is purification
Oil liquid, and the purification oil liquid on upper layer is extracted out.Wherein, the first nitrogen dispersion pipe 10, the second nitrogen point are provided in purifying tank 60
Separate tube 20, third nitrogen dispersion pipe 30, the first nitrogen dispersion pipe 10, the second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30 are equal
Bottom across purifying tank 60 is connected to the nitrogen delivery pipe 50 outside purifying tank 60, the first nitrogen dispersion pipe 10, the second nitrogen
Dispersion pipe 20, third nitrogen dispersion pipe 30 are parallel to each other and, first nitrogen dispersion vertical with the liquid level of oil liquid in purifying tank 60
Pipe 10 is higher than the second nitrogen dispersion pipe 20, and the second nitrogen dispersion pipe 20 is higher than third nitrogen dispersion pipe 30, the first nitrogen dispersion pipe
10, the second nitrogen dispersion pipe 20,30 outer wall surface far from delivery pipe one end of third nitrogen dispersion pipe offer stomata 40, often
The oil reservoir with predetermined altitude corresponding to 40 position of stomata of a nitrogen dispersion pipe, so that the oil liquid in purifying tank 60 is divided into
Fluid layer, middle fluid layer and base oil liquid layer, nitrogen divide from the first nitrogen dispersion pipe 10, the second nitrogen dispersion pipe 20, third nitrogen
The successively dispersion discharge from top to bottom at times of stomata 40 in separate tube 30, so that the layer-by-layer cooling oil of nitrogen, so that in oil liquid
Successively crystallization is precipitated wax from upper fluid layer, middle fluid layer and base oil liquid layer, crystallizes the wax of precipitation by self gravity, successively
It is settled downwards from upper fluid layer, middle fluid layer, base oil liquid layer, is finally deposited in the tank bottom of purifying tank 60.About " to oil liquid progress
From top to bottom successively cooling, make the wax in oil liquid from oil liquid successively crystallization be precipitated " specific steps are as follows: first give the first nitrogen
Gas dispersion pipe 10 leads to nitrogen so that after the cooling of upper fluid layer, and the wax in upper fluid layer crystallizes the wax for being precipitated, and being precipitated in crystallization
It is settled down in middle fluid layer and base oil liquid layer under the weight effect of matter itself, wherein the nitrogen duration is 40 minutes；Stop to
First nitrogen dispersion pipe 10 leads to nitrogen, and to the second nitrogen dispersion pipe 20 leads to nitrogen so that after the cooling of middle fluid layer, middle fluid layer
In wax crystallize and be precipitated, and be settled down in base oil liquid layer under the effect of the weight for the wax itself that crystallization is precipitated, wherein nitrogen
Duration is 30 minutes；Stop leading to nitrogen to the second nitrogen dispersion pipe 20, and to third nitrogen dispersion pipe 30 lead to nitrogen so that
After the cooling of base oil liquid layer, the wax in base oil liquid layer, which crystallizes, to be precipitated, and the weight of the wax itself in crystallization precipitation acts on
It is down to the tank bottom of purifying tank 60, wherein the nitrogen duration is 20 minutes.Wherein, the first nitrogen dispersion pipe 10, the second nitrogen point
Separate tube 20, third nitrogen dispersion pipe 30 can be distributed multiple groups in purifying tank 60, to guarantee the nitrogen being passed through in purifying tank 60 more
It is balanced.Meanwhile after in purifying tank 60 being passed through nitrogen, air displacement mixed in oil liquid can be discharged for nitrogen, and make air
It follows nitrogen to be discharged out of purifying tank 60 together, prevents mixed air oxidation oil liquid in oil liquid.Wherein, each nitrogen dispersion pipe
Delivery flow, the pressure of the nitrogen of discharge are determined according to actual production, to guarantee that the wax being precipitated is disturbed due to receiving nitrogen
It is dynamic, and it cannot be deposited to next layer of oil liquid in time；Temperature detector, 60 inner fluid of real-time detection purifying tank are set in purifying tank 60
Temperature, and be provided with interlayer outside purifying tank 60, -10~-5 DEG C of nitrogen be passed through into interlayer, is able to maintain purifying tank
Oil liquid temperature in 60 is in -6~0 DEG C of constant temperature, and oil liquid is stood 10~20h, so that the wax that crystallization is precipitated
Matter is separated with oil liquid, and the purification oil liquid on upper layer is extracted out；
Purification oil liquid filter at low temperature: the purification oil liquid extracted out in step (5) is delivered in filter at low temperature tank, in 0~4 DEG C of item
Vacuum filter is carried out under part, will be purified the impurity in oil liquid and is removed, obtains processed edible oil.
Embodiment 2:
The preparation of carclazyte slurries: 35% carclazyte is slowly added into 65% 60 DEG C of hot water, is slowly at the uniform velocity stirred, and make carclazyte
100 DEG C are to slowly warm up to 4 DEG C/min heating rate with the mixed liquor of water, so that carclazyte be made to be sufficiently mixed with water, carclazyte is made
Slurries；
Preliminary purification: by prepared carclazyte slurries and crude oil according in the ratio injection blending tank of 30:1, kept for 100 DEG C
Temperature under the conditions of, 30min is stirred at the uniform velocity with the revolving speed of 30 turns/min, after the completion of being stirred, by carclazyte slurries and crude oil shape
At mixed liquor naturally cool to 40 DEG C, and 72h is stood under 40 DEG C of constant temperature, the suspended particulate separated in crude oil is miscellaneous
Matter removes phosphatide, saponin, pigment and aflatoxins in grease, obtains bleached oil；
High temperature dehydration, depickling: the decoloration crude oil obtained after preliminary purification in step (1) is delivered in high temperature heat transfer tower, on one side
Stirring, slowly heating on one side, heating rate is controlled in 7 DEG C/min, when temperature rises to 250 DEG C, keeps 250 DEG C of constant temperature
Under, 100min is stirred at the uniform velocity with the revolving speed of 20 turns/min, moisture and free fatty acid in removal decoloration crude oil are dehydrated
Oil；
Preliminary low temperature removal of impurities: dehydration crude oil obtained in step (2) is delivered in settling tank, at the uniform velocity with the revolving speed of 30 turns/min
Stirring, and after the temperature for being dehydrated crude oil is cooled to 0~6 DEG C using 0~5 DEG C of cooling water, stop stirring, keeps in settling tank
Temperature be in 0~6 DEG C of constant temperature, and make to be dehydrated crude oil and stand 48h, make the palmitin being dehydrated in crude oil from dehydration crude oil
Crystallization is precipitated, and crystallizes palmitin and the dehydration crude oil layering of precipitation, and lower layer is precipitated impurities, and upper layer is crude oil liquid, and by upper layer
The extraction of crude oil liquid；
Thick oil filtrating: the crude oil liquid extracted out in step (3) is delivered in primary filtration tank, horizontal by 800-1200 purpose
Filter filtering obtains oil liquid after the impurity removal in crude oil liquid；
(5) secondary low temperature purification: the oil liquid obtained in step (4) after filtering is delivered in purifying tank 60, and according to 10~
The time interval of 15min is passed through -10~-5 DEG C in the oil liquid into purifying tank 60 from the bottom of purifying tank 60 by delivery pipe
Nitrogen carries out from top to bottom successively cooling to oil liquid, and making the wax in oil liquid, successively crystallization is precipitated from oil liquid, and keeps purifying
The temperature of oil liquid in tank 60 is in -6~0 DEG C of constant temperature, stands 10~20h, the wax and oil liquid point that crystallization is precipitated
Layer, lower layer are precipitated impurities, and upper layer is purification oil liquid, and the purification oil liquid on upper layer is extracted out.Wherein, it is provided in purifying tank 60
First nitrogen dispersion pipe 10, the second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30, the first nitrogen dispersion pipe 10, the second nitrogen
Dispersion pipe 20, third nitrogen dispersion pipe 30 both pass through the bottom of purifying tank 60 and the nitrogen delivery pipe 50 outside purifying tank 60 connects
It is logical, the first nitrogen dispersion pipe 10, the second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30 be parallel to each other and in purifying tank 60
The liquid level of oil liquid is vertical, and the first nitrogen dispersion pipe 10 is higher than the second nitrogen dispersion pipe 20, and the second nitrogen dispersion pipe 20 is higher than third
Nitrogen dispersion pipe 30, the first nitrogen dispersion pipe 10, the second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30 are far from delivery pipe one end
Outer wall surface offer stomata 40, the oil reservoir with predetermined altitude corresponding to 40 position of stomata of each nitrogen dispersion pipe,
So that the oil liquid in purifying tank 60 is divided into fluid layer, middle fluid layer and base oil liquid layer, nitrogen from the first nitrogen dispersion pipe 10,
The successively dispersion discharge from top to bottom at times of stomata 40 on second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30, so that nitrogen
The layer-by-layer cooling oil of gas, so that successively crystallization is precipitated the wax in oil liquid from upper fluid layer, middle fluid layer and base oil liquid layer, knot
The wax that partial crystallization goes out successively is settled downwards from upper fluid layer, middle fluid layer, base oil liquid layer by self gravity, is finally deposited in and mentions
The tank bottom of pure tank 60.About " to oil liquid progress successively cooling from top to bottom, making the wax in oil liquid, successively crystallization is analysed from oil liquid
Specific steps out " are as follows: first to the first nitrogen dispersion pipe 10 lead to nitrogen so that upper fluid layer cooling after, the wax in upper fluid layer
Matter crystallization is precipitated, and in being settled down under the effect of the weight for the wax itself that crystallization is precipitated in fluid layer and base oil liquid layer, wherein
The nitrogen duration is 45 minutes；Stop leading to nitrogen to the first nitrogen dispersion pipe 10, and leads to nitrogen to the second nitrogen dispersion pipe 20
So that the wax in middle fluid layer, which crystallizes, to be precipitated after middle fluid layer cooling, and the weight effect for the wax itself being precipitated in crystallization
Under be settled down in base oil liquid layer, wherein the nitrogen duration be 35 minutes；Stop leading to nitrogen to the second nitrogen dispersion pipe 20, and gives
Third nitrogen dispersion pipe 30 leads to nitrogen so that after the cooling of base oil liquid layer, and the wax in base oil liquid layer, which crystallizes, to be precipitated, and is analysed in crystallization
The tank bottom of purifying tank 60 is settled down under the weight effect of wax out itself, wherein the nitrogen duration is 25 minutes.Wherein,
One nitrogen dispersion pipe 1010, the second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30 can be distributed multiple groups in purifying tank 60, to protect
The nitrogen being passed through in card purifying tank 60 is more balanced.Meanwhile after in purifying tank 60 being passed through nitrogen, nitrogen can will mix in oil liquid
The air displacement discharge entered, and make air that nitrogen be followed to be discharged out of purifying tank 60 together, prevent mixed air oxygen in oil liquid
Carburetion liquid.Wherein, the delivery flow, pressure of the nitrogen of each nitrogen dispersion pipe discharge are determined according to actual production, to protect
The wax being precipitated is demonstrate,proved due to receiving nitrogen disturbance, and next layer of oil liquid cannot be deposited in time；Setting temperature is examined in purifying tank 60
Device, the temperature of 60 inner fluid of real-time detection purifying tank are surveyed, and is provided with interlayer outside purifying tank 60, -10 are passed through into interlayer
~-5 DEG C of nitrogen, the oil liquid temperature being able to maintain in purifying tank 60 is in -6~0 DEG C of constant temperature, and oil liquid is stood 10
~20h so that the wax that crystallization is precipitated is separated with oil liquid, and the purification oil liquid on upper layer is extracted out；
Purification oil liquid filter at low temperature: the purification oil liquid extracted out in step (5) is delivered in filter at low temperature tank, in 0~4 DEG C of item
Vacuum filter is carried out under part, will be purified the impurity in oil liquid and is removed, obtains processed edible oil.
Embodiment 3:
The preparation of carclazyte slurries: 35% carclazyte is slowly added into 65% 60 DEG C of hot water, is slowly at the uniform velocity stirred, and make carclazyte
95 DEG C are to slowly warm up to 3 DEG C/min heating rate with the mixed liquor of water, so that carclazyte be made to be sufficiently mixed with water, carclazyte slurry is made
Liquid；
Preliminary purification: by prepared carclazyte slurries and crude oil according in the ratio injection blending tank of 20:1, kept for 90 DEG C
Temperature under the conditions of, the revolving speed of 28 turns/min at the uniform velocity stirs 30min, and after the completion of being stirred, carclazyte slurries are formed with crude oil
Mixed liquor naturally cool to 35 DEG C, and stand 72h under 35 DEG C of constant temperature, separate the suspended particulate impurity in crude oil,
Phosphatide, saponin, pigment and the aflatoxins in grease are removed, bleached oil is obtained；
High temperature dehydration, depickling: the bleached oil obtained after preliminary purification in step (1) is delivered in high temperature heat transfer tower, is stirred on one side
It mixes, on one side slowly heating, heating rate is controlled in 6 DEG C/min, when temperature rises to 250 DEG C, keeps 250 DEG C of constant temperature
Under, 90min is stirred at the uniform velocity with the revolving speed of 18 turns/min, moisture and free fatty acid in removal decoloration crude oil are dehydrated
Oil；
Preliminary low temperature removal of impurities: dehydration crude oil obtained in step (2) is delivered in settling tank, at the uniform velocity with the revolving speed of 25 turns/min
Stirring, and after the temperature for being dehydrated crude oil is cooled to 0~6 DEG C using 0~5 DEG C of cooling water, stop stirring, keeps in settling tank
Temperature be in 0~6 DEG C of constant temperature, and make to be dehydrated crude oil and stand 48h, make the palmitin being dehydrated in crude oil from dehydration crude oil
Crystallization is precipitated, and crystallizes palmitin and the dehydration crude oil layering of precipitation, and lower layer is precipitated impurities, and upper layer is crude oil liquid, and by upper layer
The extraction of crude oil liquid；
Thick oil filtrating: the crude oil liquid extracted out in step (3) is delivered in primary filtration tank, horizontal by 800-1200 purpose
Filter filtering obtains oil liquid after the impurity removal in crude oil liquid；
Secondary low temperature purification: the oil liquid obtained after filtering in step (4) is delivered in purifying tank 60, and according to 10~15min
Time interval, -10~-5 DEG C of nitrogen is passed through in the oil liquid into purifying tank 60 from the bottom of purifying tank 60 by delivery pipe,
Successively cooling is carried out from top to bottom to oil liquid, making the wax in oil liquid, successively crystallization is precipitated from oil liquid, and keeps purifying tank 60
The temperature of interior oil liquid is in -6~0 DEG C of constant temperature, stands 10~20h, and the wax and oil liquid that crystallization is precipitated are layered, under
Layer is precipitated impurities, and upper layer is purification oil liquid, and the purification oil liquid on upper layer is extracted out.Wherein, first is provided in purifying tank 60
Nitrogen dispersion pipe 10, the second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30, the first nitrogen dispersion pipe 10, the second nitrogen dispersion
The bottom that pipe 20, third nitrogen dispersion pipe 30 both pass through purifying tank 60 is connected to the nitrogen delivery pipe 50 outside purifying tank 60, the
One nitrogen dispersion pipe 10, the second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30 be parallel to each other and with the oil liquid in purifying tank 60
Liquid level it is vertical, the first nitrogen dispersion pipe 10 be higher than the second nitrogen dispersion pipe 20, the second nitrogen dispersion pipe 20 be higher than third nitrogen
Dispersion pipe 30, the first nitrogen dispersion pipe 10, the second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30 are far from the outer of delivery pipe one end
Wall surface offers stomata 40, the oil reservoir with predetermined altitude corresponding to 40 position of stomata of each nitrogen dispersion pipe, so that
Oil liquid in purifying tank 60 is divided into fluid layer, middle fluid layer and base oil liquid layer, and nitrogen is from the first nitrogen dispersion pipe 10, second
The successively dispersion discharge from top to bottom at times of stomata 40 on nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30 so that nitrogen by
Layer cooling oil, so that successively crystallization is precipitated the wax in oil liquid from upper fluid layer, middle fluid layer and base oil liquid layer, crystallization analysis
Wax out is successively settled downwards from upper fluid layer, middle fluid layer, base oil liquid layer by self gravity, is finally deposited in purifying tank
60 tank bottom.About " carrying out from top to bottom successively cooling to oil liquid, making the wax in oil liquid, successively crystallization is precipitated from oil liquid "
Specific steps are as follows: first to the first nitrogen dispersion pipe 10 lead to nitrogen so that upper fluid layer cooling after, the wax in upper fluid layer
Crystallization is precipitated, and in being settled down under the effect of the weight for the wax itself that crystallization is precipitated in fluid layer and base oil liquid layer, wherein nitrogen
The gas duration is 50 minutes；Stop leading to nitrogen to the first nitrogen dispersion pipe 10, and to the second nitrogen dispersion pipe 20 lead to nitrogen with
After so that fluid layer is cooled down, the wax in middle fluid layer, which crystallizes, to be precipitated, and under the effect of the weight for the wax itself that crystallization is precipitated
It is settled down in base oil liquid layer, wherein the nitrogen duration is 40 minutes；Stop leading to nitrogen to the second nitrogen dispersion pipe 20, and to the
Three nitrogen dispersion pipes 30 lead to nitrogen so that after the cooling of base oil liquid layer, and the wax in base oil liquid layer, which crystallizes, to be precipitated, and is precipitated in crystallization
Wax itself weight effect under be settled down to the tank bottom of purifying tank 60, wherein the nitrogen duration is 30 minutes.Wherein, first
Nitrogen dispersion pipe 10, the second nitrogen dispersion pipe 20, third nitrogen dispersion pipe 30 can be distributed multiple groups in purifying tank 60, to guarantee to mention
The nitrogen being passed through in pure tank 60 is more balanced.Meanwhile after in purifying tank 60 being passed through nitrogen, nitrogen can will be mixed in oil liquid
Air displacement discharge, and make air that nitrogen be followed to be discharged out of purifying tank 60 together, prevent mixed air oxygen carburetion in oil liquid
Liquid.Wherein, the delivery flow, pressure of the nitrogen of each nitrogen dispersion pipe discharge are determined according to actual production, to guarantee to analyse
Wax out cannot be deposited to next layer of oil liquid due to receiving nitrogen disturbance in time；Temperature detector is set in purifying tank 60,
The temperature of 60 inner fluid of real-time detection purifying tank, and it is provided with interlayer outside purifying tank 60, -10~-5 DEG C are passed through into interlayer
Nitrogen, be able to maintain the constant temperature that oil liquid temperature in purifying tank 60 is in -6~0 DEG C, and oil liquid is stood into 10~20h,
So that the wax that crystallization is precipitated is separated with oil liquid, and the purification oil liquid on upper layer is extracted out；
Purification oil liquid filter at low temperature: the purification oil liquid extracted out in step (5) is delivered in filter at low temperature tank, in 0~4 DEG C of item
Vacuum filter is carried out under part, will be purified the impurity in oil liquid and is removed, obtains processed edible oil.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and wants according to right of the present invention
Made equivalent variations is sought, is still belonged to the scope covered by the invention.
Claims (5)
1. a kind of crude oil method of purification of edible oil, it is characterised in that: the following steps are included:
(1) preliminary purification: prepared carclazyte slurries and crude oil are injected in blending tank according to the ratio of 10:1 to 30:1,
Under the conditions of keeping 80~100 DEG C of temperature, 30min is stirred at the uniform velocity with the revolving speed of 25~30 turns/min, it, will after the completion of being stirred
The mixed liquor that carclazyte slurries and crude oil are formed naturally cools to 30~40 DEG C, and stands 72h under 30~40 DEG C of constant temperature,
The suspended particulate impurity in crude oil is separated, phosphatide, saponin, pigment and aflatoxins in grease is removed, obtains bleached oil；
(2) high temperature dehydration, depickling: the decoloration crude oil obtained after preliminary purification in step (1) is delivered in high temperature heat transfer tower, one
Side stirring, slowly heating on one side, heating rate is controlled in 5~7 DEG C/min, when temperature rises to 250 DEG C, keeps 250 DEG C of perseverance
Under the conditions of temperature, 80~100min is stirred at the uniform velocity with the revolving speed of 15~20 turns/min, remove the moisture in decoloration crude oil and is dissociated
Fatty acid obtains dehydrated oil；
(3) preliminary low temperature removal of impurities: dehydration crude oil obtained in step (2) is delivered in settling tank, with 20~30 turns/min's
Revolving speed at the uniform velocity stirs, and after the temperature for being dehydrated crude oil is cooled to 0~6 DEG C using 0~5 DEG C of cooling water, stops stirring, keeps
Temperature in settling tank is in 0~6 DEG C of constant temperature, and dehydrated oil is made to stand 48h, makes palmitin in dehydrated oil from dehydrated oil
Middle crystallization is precipitated, and the palmitin and dehydrated oil for crystallizing precipitation are layered, and lower layer is precipitated impurities, and upper layer is crude oil liquid, and by upper layer
The extraction of crude oil liquid；
(4) thick oil filtrating: the crude oil liquid extracted out in step (3) is delivered in primary filtration tank, by 800-1200 purpose
Horizontal filter filtering obtains oil liquid after the impurity removal in crude oil liquid；
(5) secondary low temperature purification: the oil liquid obtained after filtering in step (4) is delivered in purifying tank, from the bottom of purifying tank
- 10~-5 DEG C of nitrogen is passed through in the oil liquid into purifying tank by delivery pipe, successively cooling is carried out from top to bottom to oil liquid, is made
Successively crystallization is precipitated wax in oil liquid from oil liquid, and the constant temperature for keeping the temperature of the oil liquid in purifying tank to be in -6~0 DEG C
Condition stands 10~20h, and the wax and oil liquid that crystallization is precipitated are layered, and lower layer is precipitated impurities, and upper layer is purification oil liquid, and
The purification oil liquid on upper layer is extracted out；
(6) it purifies oil liquid filter at low temperature: the purification oil liquid extracted out in step (5) being delivered in filter at low temperature tank, at 0~4 DEG C
Under conditions of carry out vacuum filter, will purify oil liquid in impurity removal, obtain processed edible oil.
2. the crude oil method of purification of edible oil according to claim 1, it is characterised in that: the purification in the step (5)
The first nitrogen dispersion pipe, the second nitrogen dispersion pipe, third nitrogen dispersion pipe, the first nitrogen dispersion pipe, the second nitrogen are provided in tank
The bottom that gas dispersion pipe, third nitrogen dispersion pipe both pass through purifying tank is connected to the nitrogen delivery pipe outside purifying tank, the first nitrogen
Gas dispersion pipe, the second nitrogen dispersion pipe, third nitrogen dispersion pipe are parallel to each other and vertical with the liquid level of the oil liquid in purifying tank, and
One nitrogen dispersion pipe is higher than the second nitrogen dispersion pipe, and the second nitrogen dispersion pipe is higher than third nitrogen dispersion pipe, the first nitrogen dispersion
Pipe, the second nitrogen dispersion pipe, third nitrogen dispersion pipe offer stomata, each nitrogen far from the outer wall surface of delivery pipe one end
The oil reservoir with predetermined altitude corresponding to stomata position of dispersion pipe so that the oil liquid in purifying tank be divided into fluid layer, in
Fluid layer and base oil liquid layer, nitrogen divide from the stomata on the first nitrogen dispersion pipe, the second nitrogen dispersion pipe, third nitrogen dispersion pipe
Period successively dispersion discharge from top to bottom, so that the layer-by-layer cooling oil of nitrogen, so that wax in oil liquid is from upper fluid layer, middle oil
Successively crystallization is precipitated in liquid layer and base oil liquid layer, crystallizes the wax of precipitation by self gravity, successively from upper fluid layer, middle oil liquid
Layer, base oil liquid layer settle downwards, are finally deposited in the tank bottom of purifying tank.
3. the crude oil method of purification of edible oil according to claim 2, it is characterised in that: " to oil liquid in the step (5)
Carry out successively cooling from top to bottom, making the wax in oil liquid, successively crystallization is precipitated from oil liquid " specific steps are as follows: first to the
One nitrogen dispersion pipe leads to nitrogen so that after the cooling of upper fluid layer, and the wax in upper fluid layer, which crystallizes, to be precipitated, and be precipitated in crystallization
It is settled down in middle fluid layer and base oil liquid layer under the weight effect of wax itself, wherein the nitrogen duration is 40 to 50 minutes；
Stop give the first nitrogen dispersion pipe lead to nitrogen, and to the second nitrogen dispersion pipe lead to nitrogen so that middle fluid layer cooling after, middle oil liquid
Wax in layer, which crystallizes, to be precipitated, and is settled down in base oil liquid layer under the effect of the weight for the wax itself that crystallization is precipitated, wherein nitrogen
The gas duration is 30 to 40 minutes；Stop give the second nitrogen dispersion pipe lead to nitrogen, and to third nitrogen dispersion pipe lead to nitrogen with
After so that base oil liquid layer is cooled down, the wax in base oil liquid layer, which crystallizes, to be precipitated, and under the effect of the weight for the wax itself that crystallization is precipitated
It is settled down to the tank bottom of purifying tank, wherein the nitrogen duration is 20 to 30 minutes.
4. the crude oil method of purification of edible oil according to any one of claims 1 to 3, it is characterised in that: further include
Following steps:
The preparation of carclazyte slurries: 35% carclazyte is slowly added into 65% 60 DEG C of hot water, is slowly at the uniform velocity stirred, and make carclazyte
90~100 DEG C are to slowly warm up to the mixed liquor of water, is sufficiently mixed carclazyte with water, carclazyte slurries are made.
5. the crude oil method of purification of edible oil according to claim 4, it is characterised in that: the mixed liquor of the carclazyte and water
Heating rate control in 2~4 DEG C/min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110305731A (en) * | 2019-06-25 | 2019-10-08 | 广元海诺食品有限公司 | A kind of refining raw food oil method of purification |
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