CN116769532A - Method and system for preparing rice bran oil from high-moisture rice bran - Google Patents
Method and system for preparing rice bran oil from high-moisture rice bran Download PDFInfo
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- CN116769532A CN116769532A CN202310606524.4A CN202310606524A CN116769532A CN 116769532 A CN116769532 A CN 116769532A CN 202310606524 A CN202310606524 A CN 202310606524A CN 116769532 A CN116769532 A CN 116769532A
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- rice bran
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- tank body
- oil
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- 241000209094 Oryza Species 0.000 title claims abstract description 78
- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 78
- 235000009566 rice Nutrition 0.000 title claims abstract description 78
- 235000019774 Rice Bran oil Nutrition 0.000 title claims abstract description 39
- 239000008165 rice bran oil Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000002904 solvent Substances 0.000 claims abstract description 149
- 238000000605 extraction Methods 0.000 claims abstract description 29
- 238000011084 recovery Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 61
- 239000003921 oil Substances 0.000 claims description 41
- 235000019198 oils Nutrition 0.000 claims description 41
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical group CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 35
- 238000000935 solvent evaporation Methods 0.000 claims description 21
- 238000009833 condensation Methods 0.000 claims description 15
- 230000005494 condensation Effects 0.000 claims description 15
- 235000012054 meals Nutrition 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000009835 boiling Methods 0.000 claims description 12
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 8
- 239000013557 residual solvent Substances 0.000 claims description 7
- 239000006227 byproduct Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000002386 leaching Methods 0.000 abstract description 10
- 238000001035 drying Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 102000004169 proteins and genes Human genes 0.000 abstract description 6
- 108090000623 proteins and genes Proteins 0.000 abstract description 6
- 238000004925 denaturation Methods 0.000 abstract description 5
- 230000036425 denaturation Effects 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 239000000284 extract Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 description 4
- 239000013543 active substance Substances 0.000 description 3
- 229930003427 Vitamin E Natural products 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- WIGCFUFOHFEKBI-UHFFFAOYSA-N gamma-tocopherol Natural products CC(C)CCCC(C)CCCC(C)CCCC1CCC2C(C)C(O)C(C)C(C)C2O1 WIGCFUFOHFEKBI-UHFFFAOYSA-N 0.000 description 2
- 229940046009 vitamin E Drugs 0.000 description 2
- 235000019165 vitamin E Nutrition 0.000 description 2
- 239000011709 vitamin E Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012454 non-polar solvent Substances 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- -1 oryzanol Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 235000002378 plant sterols Nutrition 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/10—Production of fats or fatty oils from raw materials by extracting
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Extraction Or Liquid Replacement (AREA)
- Fats And Perfumes (AREA)
Abstract
The invention belongs to the technical field of rice bran oil production, and discloses a method and a system for preparing rice bran oil from high-moisture rice bran. The system comprises a solvent tank, a delivery pump, a solvent recovery subsystem, a feed auger and a pressure extraction tank. The invention directly extracts the rice bran with high moisture, eliminates the rice bran drying process, avoids protein denaturation in the rice bran, reduces a large amount of energy consumption caused by removing 6% of bound water on average, deducts the energy consumption increased by higher than the conventional leaching temperature, and realizes energy conservation by more than 20%.
Description
Technical Field
The invention belongs to the technical field of rice bran oil production, and particularly relates to a method and a system for preparing rice bran oil from high-moisture rice bran.
Background
The oil content of the rice bran is 18-20%. The rice bran oil has great nutritive value, the content of unsaturated fatty acid accounts for 80% -85%, and the rice bran oil is also rich in a large amount of unsaponifiable matters such as natural oryzanol, vitamin E, plant sterol and the like. The rice bran oil is generally produced by adopting a non-polar solvent (n-hexane) leaching method, and the process comprises rice bran pretreatment, soaking or spraying, wet meal desolventizing, mixed oil evaporation stripping and the like. Rice bran pretreatment is generally classified as pelleting or puffing. Fresh rice bran generally contains about 13% -15% of water, is not suitable for direct leaching of a solvent, and is generally reduced to 7% -9% of optimal water content by heating and drying in the pretreatment stage of rice bran.
Therefore, the conventional rice bran leaching method is based on the process that rice bran oil is obtained by leaching (extracting) high-moisture rice bran with n-hexane (or No. 6 solvent oil) after drying the rice bran. However, the drying temperature of rice bran is far higher than 100 ℃, and at such temperature, protein denaturation in rice bran (protein denaturation temperature is 80 ℃ and above) is caused, which is unfavorable for the subsequent extraction and utilization of rice bran protein, and waste of rice bran resources is caused.
In addition, if the rice bran with high water content is leached by normal hexane without drying, the leaching is difficult due to the impermeability of the solvent with high water content, so that the leaching oil-making process cannot be performed.
Therefore, a new method and system for preparing rice bran oil from high-moisture rice bran is needed.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art and provides a method and a system for preparing rice bran oil from high-moisture rice bran. The invention directly extracts the rice bran with high moisture, eliminates the rice bran drying process, avoids protein denaturation in the rice bran, reduces a large amount of energy consumption caused by removing 6% of bound water on average, deducts the energy consumption increased by higher than the conventional leaching temperature, and realizes energy conservation by more than 20%.
In order to achieve the above object, in one aspect, the present invention provides a system for preparing rice bran oil from high-moisture rice bran, the system comprising a solvent tank, a transfer pump, a solvent recovery subsystem, a feed auger and a pressure extraction tank;
the solvent tank is provided with a solvent inlet, a solvent outlet and a gas inlet and outlet;
the pressure extraction tank comprises a tank body, a stirring device, a heating jacket, a pressure gauge and a thermometer; the stirring device is arranged in the tank body; the heating jacket is sleeved in the middle of the tank body; the pressure gauge and the temperature gauge are respectively used for monitoring the pressure and the temperature in the tank body;
the upper part of the tank body is provided with a quick-opening feed inlet, a solvent inlet and a solvent evaporation outlet;
the lower part of the tank body is provided with a mixed oil outlet and a quick-opening material outlet;
the solvent outlet of the solvent tank is communicated with the solvent inlet of the tank body through the delivery pump;
the feeding auger is communicated with the quick-opening feeding port;
the solvent recovery subsystem is communicated with the mixed oil outlet and is used for recovering the solvent in the mixed oil discharged from the tank body to obtain rice bran oil.
According to the present invention, preferably, the heating jacket is provided at an upper portion thereof with a heating steam inlet, and at a lower portion thereof with a steam condensate outlet.
According to the invention, preferably, the solvent recovery subsystem comprises a down-stream extraction tank and/or a solvent evaporation device.
According to the invention, preferably, the system further comprises a solvent condensation recovery subsystem; the solvent tank is also provided with a condensed solvent inlet; the solvent evaporation outlet is communicated with a condensed solvent inlet through the solvent condensation recovery subsystem; the solvent condensation recovery subsystem includes a vacuum pump.
According to the invention, preferably, the solvent inlet of the solvent tank comprises an extraction solvent inlet and optionally an entrainer inlet.
In another aspect, the present invention provides a method for preparing rice bran oil from high moisture rice bran, the method adopting the system, comprising the steps of:
s1: feeding the high-moisture rice bran in the feeding auger into the quick-opening feed inlet;
s2: the solvent in the solvent tank is sent to a solvent inlet of the tank body from a solvent outlet of the solvent tank through a delivery pump; sealing the tank body; starting the stirring device, heating the tank body through the heating jacket to enable the solvent in the tank body to be in a subcritical state, and extracting to obtain mixed oil, oil-discharged rice bran and rice bran wet meal in the tank body; opening the mixed oil outlet, discharging the mixed oil, and recovering the solvent in the mixed oil to obtain rice bran oil;
s3: and (2) repeating the step (S2) for the rice bran discharged from the tank body for a plurality of times, and obtaining rice bran wet meal in the tank body.
According to the present invention, preferably, in step S2:
heating the tank body through the heating jacket to a temperature in the tank body which is 4-10 ℃ higher than the boiling point of the solvent in the tank body;
the extraction time is 10-30min;
the method for recovering the solvent in the mixed oil comprises the steps of feeding the mixed oil into the next extraction tank, and extracting and recovering the solvent in the mixed oil; or the mixed oil is sent to the solvent evaporation device, and the solvent in the mixed oil is evaporated and recovered.
According to the present invention, preferably, the method further includes, after step S3: closing the mixed oil outlet, heating the tank body through the heating jacket, starting a vacuum pump of the solvent evaporation outlet and the solvent condensation recovery subsystem, removing residual solvent from rice bran wet meal in the tank body under vacuum negative pressure and heating conditions, and sending the residual solvent back to the solvent tank through the solvent evaporation outlet and the solvent condensation recovery subsystem in sequence to be used as solvent; and obtaining a byproduct rice bran meal in the tank body and discharging the rice bran meal out of the tank body through the quick-opening discharge hole.
According to the present invention, preferably, the vacuum negative pressure and heating conditions include: heating the tank by the heating jacket until the temperature in the tank is higher than the boiling point of the solvent in the tank, but not higher than 80 ℃; the pressure in the tank body is between-24 KPa and-26 KPa.
According to the present invention, it is preferable that the time for removing the remaining solvent is 40 to 60 minutes.
According to the present invention, preferably, the method of heating the can body through the heating jacket includes feeding heating steam to a gap between the heating jacket and the can body through the heating steam inlet, and discharging condensed water of the heating steam through the steam condensate outlet.
According to the present invention, preferably, the high-moisture rice bran has a water content of 13% to 15% based on the total weight of the high-moisture rice bran.
According to the present invention, preferably, the solvent in the solvent tank comprises an extraction solvent and optionally an entrainer.
According to the present invention, preferably, the extraction solvent is n-hexane and/or No. 6 solvent oil.
According to the present invention, preferably, the entrainer is at least one of ethanol, acetone and isopropanol, and the entrainer accounts for 1% -10% of the weight of the extraction solvent.
The technical scheme of the invention has the following beneficial effects:
the invention realizes the pressurizing effect by increasing the temperature of the high-moisture rice bran during extraction, so that the solvent in the tank body is in a subcritical state, and has the advantages that: firstly, the solubility of water in a solvent can be increased, and part of water is extracted together; secondly, the diffusion speed of the solvent in the rice bran can be improved, and the rice bran leaching efficiency is greatly improved.
According to the invention, a certain amount of entrainer such as polar solvents such as ethanol and acetone is added into the extraction solvent, so that the dissolution of water in the extraction solvent can be improved, the penetration of the extraction solvent into rice bran is facilitated, active substances such as oryzanol, vitamin E and phytosterol in the rice bran are simultaneously extracted together, the content of the active substances in the rice bran oil is effectively improved, the content of the active substances can be improved by more than 20% by adjusting conditions such as extraction pressure, entrainer types, entrainer addition amount and the like, and the value of the rice bran oil is further improved.
The invention directly extracts the rice bran with high moisture, eliminates the rice bran drying process, avoids protein denaturation in the rice bran, reduces a large amount of energy consumption caused by removing 6% of bound water on average, deducts the energy consumption increased by higher than the conventional leaching temperature, and realizes energy conservation by more than 20%.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
Fig. 1 is a schematic diagram of a system for preparing rice bran oil from high moisture rice bran according to embodiment 1 of the present invention.
The reference numerals are explained as follows:
1-quick opening a feed inlet; 2-stirring device; 3-a solvent evaporation outlet; 4-solvent inlet; 5-heating jacket; 6-heating steam inlet; 7-a mixed oil outlet; 8-a steam condensate outlet; 9, quick opening a discharge hole; p-pressure gauge; a T-thermometer; 10-a solvent tank; 11-extraction solvent inlet; 12-solvent outlet; 13-gas inlet and outlet; 14-condensing solvent inlet; 15-entrainer inlet; 16-a transfer pump; 17-feeding auger; 18-solvent evaporation means; 19-a solvent condensation recovery subsystem; 20-tank body.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
The embodiment provides a system for preparing rice bran oil from high-moisture rice bran, which is shown in fig. 1, and comprises a solvent tank 10, a delivery pump 16, a solvent recovery subsystem, a solvent condensation recovery subsystem 19, a feeding auger 17 and a pressure extraction tank;
the solvent tank 10 is provided with a solvent inlet, a solvent outlet 12, a condensed solvent inlet 14 and a gas inlet and outlet 15;
the solvent inlet of the solvent tank 10 comprises an extraction solvent inlet 11 and an entrainer inlet 15;
the pressure extraction tank comprises a tank body 20, a stirring device 2, a heating jacket 5, a pressure gauge P and a thermometer T; the stirring device 2 is arranged in the tank body 20; the heating jacket 5 is sleeved in the middle of the tank body 20, a heating steam inlet 6 is formed in the upper part of the heating jacket 5, and a steam condensate outlet 8 is formed in the lower part of the heating jacket; the pressure gauge P and the thermometer T are respectively used for monitoring the pressure and the temperature in the tank body 20;
the upper part of the tank body 20 is provided with a quick-opening feed inlet 1, a solvent inlet 4 and a solvent evaporation outlet 3;
the lower part of the tank body 20 is provided with a mixed oil outlet 7 and a quick-opening material outlet 9;
the solvent outlet of the solvent tank 10 is communicated with the solvent inlet 4 of the tank body 20 through the delivery pump 16;
the feeding auger 17 is communicated with the quick-opening feeding port 1;
the solvent recovery subsystem is a solvent evaporation device 18, and the solvent evaporation device 18 is communicated with the mixed oil outlet 7 and is used for recovering the solvent in the mixed oil discharged from the tank body 20 to obtain rice bran oil;
the solvent evaporation outlet 3 is communicated with a condensed solvent inlet 14 through the solvent condensation recovery subsystem 19; the solvent condensate recovery subsystem 19 includes a vacuum pump (not shown).
The method for preparing rice bran oil from high-moisture rice bran by adopting the system comprises the following steps of:
s1: high-moisture rice bran with the water content of 13-15% in the feeding auger 17 is fed into the quick-opening feed inlet 1;
s2: n-hexane (boiling point 69 ℃) in the solvent tank 10 is sent into the solvent inlet 4 of the tank body 20 from the solvent outlet 12 of the solvent tank 10 through the delivery pump 16; sealing the canister 20; starting the stirring device 2, heating the tank body 20 through the heating jacket 5 until the temperature in the tank body 20 is 5 ℃ higher than the boiling point of the solvent in the tank body 20, enabling the solvent in the tank body 20 to be in a subcritical state, and extracting for 20min to obtain mixed oil, oil-discharged rice bran and rice bran wet meal in the tank body 20; opening the mixed oil outlet 7, discharging the mixed oil, feeding the mixed oil into the solvent evaporation device 18, and evaporating and recovering the solvent in the mixed oil to obtain rice bran oil;
s3: repeating the step S2 2 for the rice bran oil discharged from the tank 20, thereby obtaining rice bran wet meal in the tank 20.
S4: closing the mixed oil outlet 7, continuing to heat the tank body 20 through the heating jacket 5 until the temperature in the tank body 20 is increased relative to the step S2 but not higher than 80 ℃, then starting a vacuum pump of the solvent evaporation outlet 3 and the solvent condensation recovery subsystem 19, removing residual solvent from rice bran wet meal in the tank body 20 under vacuum negative pressure and heating condition (the pressure is-25 KPa) within 50min, and sending the residual solvent back to the solvent tank 10 through the solvent evaporation outlet 3 and the solvent condensation recovery subsystem 19 in sequence for use as solvent; a byproduct rice bran meal is obtained in the tank 20 and is discharged out of the tank 20 through the quick-opening discharge opening 9.
Wherein the method of heating the tank 20 through the heating jacket 5 includes feeding heating steam to a gap between the heating jacket 5 and the tank 20 through the heating steam inlet 6, and discharging condensed water of the heating steam through the steam condensate outlet 8.
Example 2
The present embodiment provides a method for preparing rice bran oil from high-moisture rice bran, and the difference between the present embodiment and embodiment 1 is that:
the solvent tank 10 contains n-hexane and ethanol, wherein the ethanol accounts for 4% of the weight of the n-hexane.
In step S2, n-hexane and ethanol in the solvent tank 10 are fed from the solvent outlet 12 of the solvent tank 10 to the solvent inlet 4 of the tank 20 by the feed pump 16;
in step S2, the tank 20 is heated by the heating jacket 5 to a temperature of 75 ℃ in the tank 20, that is, 6 ℃ higher than the boiling point (boiling point 69 ℃) of n-hexane.
Example 3
The present embodiment provides a method for preparing rice bran oil from high-moisture rice bran, and the difference between the present embodiment and embodiment 1 is that:
the solvent tank 10 contains n-hexane and acetone, and the acetone accounts for 6% of the weight of the n-hexane.
In step S2, n-hexane and acetone in the solvent tank 10 are fed from the solvent outlet 12 of the solvent tank 10 to the solvent inlet 4 of the tank 20 by the feed pump 16;
in step S2, the tank 20 is heated by the heating jacket 5 to a temperature of 74 ℃ in the tank 20, that is, 5 ℃ higher than the boiling point (boiling point 69 ℃) of n-hexane.
Example 4
The present embodiment provides a method for preparing rice bran oil from high-moisture rice bran, and the difference between the present embodiment and embodiment 1 is that:
the solvent tank 10 contains n-hexane and isopropanol, and the isopropanol accounts for 8% of the weight of the n-hexane.
In step S2, n-hexane and isopropyl alcohol in the solvent tank 10 are fed from the solvent outlet 12 of the solvent tank 10 to the solvent inlet 4 of the tank 20 by the feed pump 16;
in step S2, the tank 20 is heated by the heating jacket 5 to a temperature of 79 ℃ in the tank 20, that is, 10 ℃ above the boiling point (boiling point 69 ℃) of n-hexane.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (10)
1. A system for preparing rice bran oil from high-moisture rice bran is characterized by comprising a solvent tank, a delivery pump, a solvent recovery subsystem, a feeding auger and a pressure extraction tank;
the solvent tank is provided with a solvent inlet, a solvent outlet and a gas inlet and outlet;
the pressure extraction tank comprises a tank body, a stirring device, a heating jacket, a pressure gauge and a thermometer; the stirring device is arranged in the tank body; the heating jacket is sleeved in the middle of the tank body; the pressure gauge and the temperature gauge are respectively used for monitoring the pressure and the temperature in the tank body;
the upper part of the tank body is provided with a quick-opening feed inlet, a solvent inlet and a solvent evaporation outlet;
the lower part of the tank body is provided with a mixed oil outlet and a quick-opening material outlet;
the solvent outlet of the solvent tank is communicated with the solvent inlet of the tank body through the delivery pump;
the feeding auger is communicated with the quick-opening feeding port;
the solvent recovery subsystem is communicated with the mixed oil outlet and is used for recovering the solvent in the mixed oil discharged from the tank body to obtain rice bran oil.
2. The system for preparing rice bran oil from high moisture rice bran as claimed in claim 1, wherein the heating jacket is provided with a heating steam inlet at an upper portion thereof, and a steam condensate outlet at a lower portion thereof.
3. The system for preparing rice bran oil from high moisture rice bran as claimed in claim 1 wherein the solvent recovery subsystem comprises a next extraction tank and/or a solvent evaporation apparatus.
4. The system for preparing rice bran oil from high moisture rice bran as claimed in claim 1, wherein the system further comprises a solvent condensation recovery subsystem; the solvent tank is also provided with a condensed solvent inlet;
the solvent evaporation outlet is communicated with a condensed solvent inlet through the solvent condensation recovery subsystem;
the solvent condensation recovery subsystem includes a vacuum pump.
5. The system for producing rice bran oil from high moisture rice bran as claimed in claim 1 wherein the solvent inlet of the solvent tank comprises an extraction solvent inlet and optionally an entrainer inlet.
6. A method for preparing rice bran oil from high moisture rice bran, wherein the method employs the system of any one of claims 1-5, comprising the steps of:
s1: feeding the high-moisture rice bran in the feeding auger into the quick-opening feed inlet;
s2: the solvent in the solvent tank is sent to a solvent inlet of the tank body from a solvent outlet of the solvent tank through a delivery pump; sealing the tank body; starting the stirring device, heating the tank body through the heating jacket to enable the solvent in the tank body to be in a subcritical state, and extracting to obtain mixed oil, oil-discharged rice bran and rice bran wet meal in the tank body; opening the mixed oil outlet, discharging the mixed oil, and recovering the solvent in the mixed oil to obtain rice bran oil;
s3: and (2) repeating the step (S2) for the rice bran discharged from the tank body for a plurality of times, and obtaining rice bran wet meal in the tank body.
7. The method for preparing rice bran oil from high moisture rice bran as claimed in claim 6, wherein, in step S2:
heating the tank body through the heating jacket to a temperature in the tank body which is 4-10 ℃ higher than the boiling point of the solvent in the tank body;
the extraction time is 10-30min;
the method for recovering the solvent in the mixed oil comprises the steps of feeding the mixed oil into the next extraction tank, and extracting and recovering the solvent in the mixed oil; or the mixed oil is sent to the solvent evaporation device, and the solvent in the mixed oil is evaporated and recovered.
8. The method for preparing rice bran oil from high moisture rice bran as claimed in claim 6, wherein the method further comprises, after step S3: closing the mixed oil outlet, heating the tank body through the heating jacket, starting a vacuum pump of the solvent evaporation outlet and the solvent condensation recovery subsystem, removing residual solvent from rice bran wet meal in the tank body under vacuum negative pressure and heating conditions, and sending the residual solvent back to the solvent tank through the solvent evaporation outlet and the solvent condensation recovery subsystem in sequence to be used as solvent; obtaining byproduct rice bran meal in the tank body and discharging the byproduct rice bran meal out of the tank body through the quick-opening discharge hole;
preferably, the vacuum negative pressure and heating conditions include: heating the tank by the heating jacket until the temperature in the tank is higher than the boiling point of the solvent in the tank, but not higher than 80 ℃; the pressure in the tank body is-24 KPa to-26 KPa;
preferably, the time for removing the residual solvent is 40-60min.
9. The method for preparing rice bran oil from high moisture rice bran as claimed in any one of claims 6 to 8, wherein the method for heating the can body through the heating jacket comprises supplying heating steam to a gap between the heating jacket and the can body through the heating steam inlet, and discharging condensed water of the heating steam through the steam condensate outlet.
10. The method for preparing rice bran oil from high moisture rice bran as claimed in claim 6, wherein,
the high-moisture rice bran is characterized in that the content of water in the high-moisture rice bran is 13% -15% based on the total weight of the high-moisture rice bran;
the solvent within the solvent tank comprises an extraction solvent and optionally an entrainer;
preferably, the extraction solvent is n-hexane and/or No. 6 solvent oil;
preferably, the entrainer is at least one of ethanol, acetone and isopropanol, and the entrainer accounts for 1% -10% of the weight of the extraction solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310606524.4A CN116769532A (en) | 2023-05-23 | 2023-05-23 | Method and system for preparing rice bran oil from high-moisture rice bran |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310606524.4A CN116769532A (en) | 2023-05-23 | 2023-05-23 | Method and system for preparing rice bran oil from high-moisture rice bran |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116769532A true CN116769532A (en) | 2023-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310606524.4A Pending CN116769532A (en) | 2023-05-23 | 2023-05-23 | Method and system for preparing rice bran oil from high-moisture rice bran |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116769532A (en) |
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2023
- 2023-05-23 CN CN202310606524.4A patent/CN116769532A/en active Pending
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