CN112970840B - Fresh-keeping grain and its processing method - Google Patents
Fresh-keeping grain and its processing method Download PDFInfo
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- CN112970840B CN112970840B CN202110146603.2A CN202110146603A CN112970840B CN 112970840 B CN112970840 B CN 112970840B CN 202110146603 A CN202110146603 A CN 202110146603A CN 112970840 B CN112970840 B CN 112970840B
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- 238000003672 processing method Methods 0.000 title claims abstract description 13
- 241000209094 Oryza Species 0.000 claims abstract description 111
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 111
- 235000009566 rice Nutrition 0.000 claims abstract description 111
- 235000013339 cereals Nutrition 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 25
- 102000004190 Enzymes Human genes 0.000 claims abstract description 12
- 108090000790 Enzymes Proteins 0.000 claims abstract description 12
- 230000009849 deactivation Effects 0.000 claims abstract description 11
- 230000001954 sterilising effect Effects 0.000 claims abstract description 10
- 238000007781 pre-processing Methods 0.000 claims abstract description 9
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims description 109
- 235000021329 brown rice Nutrition 0.000 claims description 11
- 238000012216 screening Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 244000052616 bacterial pathogen Species 0.000 claims description 5
- 108010050181 aleurone Proteins 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 210000001161 mammalian embryo Anatomy 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000009928 pasteurization Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 4
- 230000006866 deterioration Effects 0.000 abstract description 2
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- 238000010586 diagram Methods 0.000 description 6
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- 102000004169 proteins and genes Human genes 0.000 description 3
- 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 2
- 108010066114 cabin-2 Proteins 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002632 lipids Chemical class 0.000 description 2
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- 235000013343 vitamin Nutrition 0.000 description 2
- 229930003231 vitamin Natural products 0.000 description 2
- 229940088594 vitamin Drugs 0.000 description 2
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- 235000007319 Avena orientalis Nutrition 0.000 description 1
- 244000075850 Avena orientalis Species 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 240000006394 Sorghum bicolor Species 0.000 description 1
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- 229920002472 Starch Polymers 0.000 description 1
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- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000003187 abdominal effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
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- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 235000013325 dietary fiber Nutrition 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 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 1
- 235000013402 health food Nutrition 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 230000000415 inactivating effect Effects 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B9/00—Preservation of edible seeds, e.g. cereals
- A23B9/02—Preserving by heating
- A23B9/025—Preserving by heating with use of gases
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Cereal-Derived Products (AREA)
Abstract
A fresh-keeping processing method comprises the following steps: preprocessing grain raw materials to form embryo-retaining rice; delivering the germ-retaining rice into a continuous totally-enclosed steam processing system, and performing rapid high-temperature sterilization and enzyme deactivation to form fresh germ-retaining rice; and packaging the fresh-keeping germ rice. According to the fresh-keeping germ rice, the aim of avoiding putrefaction and deterioration for a long time is fulfilled, rice grains of the germ rice are not adhered to each other, the original shape and the use mode of the rice are maintained, and the health level of people is improved due to the fact that the germ of the rice has rich nutrition. And the continuous totally-enclosed steam processing system adopted in the processing process of the fresh-keeping germ rice eliminates the leakage of steam in the processing process, can also avoid the contact between the germ rice and the outside air and condensed water in the processing process to the greatest extent, and prevents the germ rice from being polluted or generating hydrolysis reaction in the processing process.
Description
Technical Field
The invention relates to grains and a processing method thereof, in particular to fresh-keeping grains and a processing method thereof.
Background
The content of protein and lipid in grain such as rice embryo is about 20% or more, the amino acid composition in protein is balanced, the natural vitamin E in lipid is about 200mg-300mg/100g, and the fatty acid is 70% or more unsaturated fatty acid, and the composition is reasonable. In addition, the rice germ also contains abundant multiple vitamins, dietary fibers and minerals, so the rice germ is a health food with rich nutrition. However, in the existing rice processing, in order to pursue better taste, polishing is too thorough, so that the finished rice only remains starch and a small amount of protein, and nutrients such as cellulose, vitamins and the like are basically removed by polishing. Accordingly, a germ rice (also called germ-retaining rice) capable of retaining germs in the finished rice and a processing method thereof have been sought. However, the germ in rice is active and easily spoiled. In the rice processing process, the rice germ is closely contacted with biological enzymes and microorganisms, especially when the processing temperature reaches 31-65 ℃, the rice germ is easy to be polluted and can rapidly start hydrolysis reaction, rancidity can occur in a short time, and the rice cannot be preserved, so that the germ rice cannot be eaten and cannot be preserved for a long time.
The patent application of China patent No. 201810018592.8 discloses a manufacturing process of full-nutrition germ rice, which comprises the following steps of firstly removing husks from brown rice and polishing, then sterilizing, curing and crushing a mixture containing germs removed in the polishing process at high temperature, independently packaging, and finally combining the mixture with a bag filled with rice into a whole for storage and sale. However, the product thus formed is still rice and the germ is germ, and therefore cannot be said to be germ rice in a strict sense.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide fresh-keeping grains and a processing method thereof, so as to solve the problems in the prior art.
According to one aspect of the invention, there is provided a method of processing fresh food, comprising the steps of:
A. preprocessing grain raw materials to form embryo-retaining rice;
B. delivering the germ-retaining rice into a continuous totally-enclosed steam processing system, and performing rapid high-temperature sterilization and enzyme deactivation to form fresh germ-retaining rice;
C. and packaging the fresh-keeping germ rice.
The continuous totally-enclosed steam processing system comprises a steam chamber, a front transition bin connected with the inlet end of the steam chamber, and a rear transition bin connected with the outlet end of the steam chamber, wherein the rapid high-temperature sterilization is performed
The enzyme deactivation comprises the following steps:
B1. delivering the embryo-left rice into a front transition bin;
B2. introducing steam into a front transition bin;
B3. delivering the embryo-retaining rice in the front transition bin into the steam chamber;
B4. transferring the germ-retaining rice from the inlet end to the outlet end of the steam chamber through a conveyor belt, wherein the germ-retaining rice forms fresh germ-retaining rice in the steam chamber;
B5. introducing steam into a post-transition bin;
B6. delivering the fresh-keeping germ rice in the steam chamber into a rear transition bin;
B7. and (5) delivering the fresh-keeping germ rice from the post-transition bin.
The temperature for sterilizing and inactivating the enzyme at high temperature is controlled between 110 ℃ and 150 ℃.
The time for quick sterilization and enzyme deactivation is controlled to be 20S to 120S.
The preprocessing comprises at least one of the following working procedures: checking and accepting the raw materials; entering a cleaning sieve to remove light impurities such as thread ends, dust and the like in the brown rice; dry layering separation is carried out, a brown rice aleurone layer is removed or part of brown rice aleurone layer is removed through multiple grinding, and germs are reserved; screening broken rice in germ rice by a rice screen; and (3) color selection, namely screening yellow rice in the germ rice, and removing foreign matters such as white rice and stones in the germ rice.
The steam chamber, the front transition bin and the rear transition bin are internally provided with conveyor belts for conveying materials, and a steam serial pipeline is arranged between the steam chamber and the front transition bin and/or the rear transition bin.
The front transition bin and/or the rear transition bin are/is provided with an outer drainage device which comprises a drainage/evacuation pipeline and a drainage/evacuation valve.
The front transition bin and the rear transition bin are provided with an inner gate at a port connected with the steam chamber, and an outer gate at the other port.
Sealing plates are arranged between the inner gate and the port and between the outer gate and the other port, and are used for tightly attaching the inner gate and the outer gate to the port.
According to another aspect of the present invention there is provided a fresh food product made by the method as described above.
According to the fresh-keeping grain, the germ-retaining rice formed after the pretreatment is sent into the continuous totally-enclosed steam processing system, so that the germ-retaining rice can be sterilized and deactivated at a high temperature for a short time, the sterilization and deactivation effect can be achieved, the aim of avoiding spoilage and deterioration after long-time preservation is achieved, the rice grains of the germ rice cannot be adhered to each other, the original shape and the use mode of the grain are maintained, and the germ in the grain has rich nutritive value, so that the health level of people is improved. And the continuous totally-enclosed steam processing system adopted in the processing process of the fresh-keeping grains eliminates the leakage of steam in the processing process, reduces the energy consumption, improves the production efficiency, realizes the full automation and the intellectualization of the processing process of the fresh-keeping grains, can also furthest avoid the germ rice from contacting with the outside air and the condensed water in the processing process, and prevents the germ rice from being polluted or generating hydrolysis reaction in the processing process.
Drawings
Other objects, advantages and effects of the present invention will become more apparent in the following description when taken in conjunction with the accompanying drawings which describe embodiments of the invention for a better understanding of the invention. In the drawings:
fig. 1 is a schematic view showing a preprocessing flow of fresh-keeping grains according to an embodiment of the present invention.
Fig. 2 is an overall schematic diagram showing a continuous type full-closed steam processing system employed in a fresh food processing method according to an embodiment of the present invention.
Fig. 3 is a schematic diagram showing a front transition piece 2 of the embodiment shown in fig. 2.
Fig. 4 is a schematic diagram showing a post-transition bin 3 of the embodiment shown in fig. 2.
Fig. 5 is a flow chart showing a processing method of fresh-keeping grain according to an embodiment of the present invention.
Fig. 6 is a flow chart showing a method for processing fresh-keeping grains according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic view showing a preprocessing flow of fresh-keeping grains according to an embodiment of the present invention. According to the fresh-keeping grain of the present invention, raw materials such as rice are first pre-processed. Referring to fig. 1, step S10, a raw material, such as brown rice, is accepted; s11, entering a cleaning sieve to remove light impurities such as thread ends, dust and the like in the brown rice; step S12, performing dry layering separation, removing the brown rice paste powder layer (or partially removing, and customizing according to the user requirement) through multiple grinding, and retaining germs; step S13, entering a white rice sieve 1, and screening broken rice in germ rice; s14, entering color selection 1, and screening yellow rice in germ rice; step S15, entering a white rice sieve 2, and further screening broken rice in the germ rice; and S16, performing color selection 2, and removing foreign matters such as white abdominal rice and stones in the germ rice. It will be appreciated by those skilled in the art that the above-described pre-processing of fresh germ rice is merely an exemplary process, and that modifications or additions may be made to the above-described process by those skilled in the art, depending on the germ rice requirements, and that similar pre-processing results would be germ retaining rice, such as germ retaining rice, hereinafter also referred to as germ retaining rice.
Fig. 2 is an overall schematic diagram showing a continuous type full-closed steam processing system employed in a fresh food processing method according to an embodiment of the present invention. Referring to fig. 2, the continuous totally enclosed steam processing system according to the present invention comprises a steam chamber 1, a front transition chamber 2 connected to an inlet end 11 of the steam chamber 1, and a rear transition chamber 3 connected to an outlet end 12 of the steam chamber 1.
Fig. 3 is a schematic diagram showing a front transition piece 2 of the embodiment shown in fig. 2. Referring to fig. 2 and 3 in combination, the front transition bin 2 is provided with an inner gate 21, for example, at the port that interfaces with the steam chamber 1, and an outer gate 22 at the port that receives the germ-retaining rice (not shown). A conveyor 25 is provided between the outer and inner gates 22 and 21 to convey the germ-remaining rice fed from the outer gate 22 to one side of the inner gate 21 and to the inside of the steam chamber 1 through the inner gate 21. In a preferred embodiment, the inner shutter 21 and the outer shutter 22 are automatically lifted and lowered by the cylinder drive. For example, when the germ-remaining rice is fed into the front transition bin 2, the outer shutter 22 is opened by driving the cylinder, and after the germ-remaining rice enters the front transition bin 2, the outer shutter 22 is closed. Steam is then introduced into the front transition chamber 2 until the pressure in the front transition chamber 2 is in equilibrium with the pressure in the steam chamber 1. Preferably, a sealing plate (not shown) is disposed between the outer gate 22 and the inlet end of the front transition bin 2, and at this time, the outer gate 22 and the inlet end can be automatically adsorbed and sealed due to the pressure difference between the front transition bin 2 and the outside. When the pressure in the transition bin 2 and the pressure in the steam chamber 1 are balanced, the inner gate 21 can be opened by driving the air cylinder, the embryo-remaining rice is sent into the steam chamber 1 through the conveyor belt 25, the inner gate 21 is closed, and the next round of operation is sequentially performed. Preferably, the germ-retaining rice may be carried by trays (not shown), for example, two trays containing germ-retaining rice may be transported at a time into the front transition bin 2.
In another preferred embodiment, an external drainage device is provided at the bottom of the front transition bin 2, for example to drain air or condensate from the bin. This is because, during the processing, the steam pressure in the front transition chamber 2 reaches about 4kg, and in this case, the outer shutter 22 cannot be opened even if the pallet is fed into the front transition chamber 2. Therefore, the front transition chamber 2 needs to be depressurized by the discharging device. Preferably, the external drainage device of the front transition bin 2 comprises a drainage/evacuation pipeline 23 and a drainage/evacuation valve 24, so that the front transition bin 2 can be depressurized before the tray is fed to facilitate the opening of the external gate 22, and the external gate 22 is frequently opened and closed, so that more air and condensed water in the front transition bin 2 accumulate, the drainage/evacuation valve 24 needs to be kept open for a certain time when steam is introduced, and then is closed again, so that the steam is timely drained through the drainage/evacuation pipeline 23. On the other hand, the front transition bin 2 adopts strict sealing measures and a drainage/emptying pipeline 23 and a valve 24 thereof, so that the contact between the embryo-retaining rice input into the continuous totally-enclosed steam processing system and the outside air and condensed water can be avoided to the greatest extent, and the embryo-retaining rice is prevented from being polluted or generating hydrolysis reaction in the process.
Fig. 4 is a schematic diagram showing a post-transition bin 3 of the embodiment shown in fig. 2. Referring to fig. 2 and 4 in combination, the rear transition chamber 3 is provided with an inner shutter 31 at a port to be butted with the steam chamber 1 and an outer shutter 32 at a port to output germ rice (not shown), for example, as in the case of the front transition chamber 2. A conveyor belt 25 is also provided between the inner and outer gates 31 and 32 for conveying trays carrying germ rice output from the steam chamber 1 to the outer gate 32 and out through the outer gate 32. Preferably, an external drainage device is also provided at the bottom of the rear transition bin 3, comprising a drainage/evacuation pipe 23 and a drainage/evacuation valve 24. The inner gate 31 of the rear transition chamber 3 is preferably also provided with a sealing plate 26 at the port that interfaces with the steam chamber 1, and preferably a sealing plate (not shown) is also provided between the outer gate 32 of the rear transition chamber 3 and the outlet end of the rear transition chamber 3, the function and function of which are the same as those of the front transition chamber 2 described above.
With continued reference to fig. 2-4, the steam chamber 1 is, for example, a tank 10 of more than 10 meters in length, in which a steam inlet main valve 17 is provided. Preferably, the tank 10 is, for example, circular in cross-section and has a length of, for example, 13 meters. In another preferred embodiment, the can 10 is rectangular in cross-section, for example, and those skilled in the art will appreciate that the particular shape, length, volume, etc. of the can 10 may be varied depending on the manufacturing requirements and site conditions. The inside of the tank 10 is provided with a conveyor belt 13, for example, for conveying a tray entering the inlet end 11 of the steam chamber 1 from the front transition bin 2 into the inside of the tank 10, and the germ-remaining rice in the tray is sent to the rear transition bin 3 from the conveyor belt 13 through the outlet end 12 of the steam chamber 1 after being sterilized and deactivated by steam in the inside of the tank 10. The conveyor belt 13 includes, for example, a long chain 131 provided on a driving wheel, and a net rack 132 provided on the long chain 131. Preferably, the upper side of the tank 10 is provided with a manual service and cleaning port 18. Obviously, the port 18 may be provided on other sides of the tank 10.
According to one embodiment of the invention, the steam chamber 1, the front transition bin 2 and the rear transition bin 3 are respectively provided with material conveying belts (13, 25) comprising conveying chains and net racks, wherein each section of conveying belt is controlled to run by an independent motor, so that the operation and control are simpler and more convenient, and the net racks adopt a net-shaped structure to increase the friction force between the net racks and the trays, so that the trays are conveyed more stably.
The front transition chamber 2 and the rear transition chamber 3 are for example each provided with a steam cross-over duct 4 and may be mutually communicating, i.e. they may both be connected to the interior of the steam chamber 1 via a common steam cross-over duct 4'. Correspondingly, for example, a steam bypass main valve 45 is provided at the position of the bypass line 4' connecting the steam chamber 1, and a bypass line valve 41 is provided at the position close to the front transition chamber 2 and the rear transition chamber 3, respectively. According to this embodiment, the front and rear transition cabins can be mutually communicated through the steam-communicated pipeline 4', and the system can timely feed the steam which is originally discharged inside the front transition cabin 2/rear transition cabin 3 into the rear transition cabin 3/front transition cabin 2 again so as to fully utilize energy, and simultaneously prevent the direct discharge of steam. Preferably, when the front transition bin 2 and the rear transition bin 3 are mutually led in/out of steam through the steam serial pipeline 4', if insufficient steam quantity and pressure in the bin occur, the steam serial main valve 45 can be opened so as to lead out the steam from the inside of the steam chamber 1 to the front transition bin and the rear transition bin. Preferably, for example, pressure sensors and temperature sensors (not shown) are arranged in the front transition chambers 2 and the rear transition chambers 3, and once insufficient pressure or temperature in the chambers occurs, the steam cross-over total valve 45 can be opened to supplement steam in the front transition chamber 2 and/or the rear transition chamber 3.
Fig. 5 is a flow chart showing a processing method of fresh-keeping grain according to an embodiment of the present invention.
Referring to fig. 2 to 5 in combination, the rapid pasteurization and enzyme deactivation comprises the following steps: step S50, introducing steam into the steam chamber; step S51, delivering the embryo-left rice into a front transition bin; step S52, introducing steam into a front transition bin; step S53, the embryo-remained rice in the front transition bin is sent into a steam chamber; step S54, conveying the germ-retaining rice from the inlet end to the outlet end of the steam chamber through a conveying belt, wherein the germ-retaining rice forms fresh germ rice in the steam chamber; step S55, introducing steam into a post-transition bin; step S56, delivering the fresh-keeping germ rice in the steam chamber into a post-transition bin; and step S57, delivering the fresh-keeping germ rice from the post-transition bin.
Fig. 6 is a flow chart showing a method for processing fresh-keeping grains according to another embodiment of the present invention. Referring to fig. 2 to 6 in combination, in step S1, the system determines whether the pressure in the front transition bin 2 and the pressure in the steam chamber 1 are balanced? If so, the system opens the gate 21 in the front transition bin 2 in step S2, the tray carrying the embryo-retaining rice is sent into the steam chamber 1 from the front transition bin 2, and the gate 21 is closed. In step S3, the system opens the steam-bypass valves 41 of the front transition chamber 2 and the rear transition chamber 3, and guides the steam in the front transition chamber 2 into the rear transition chamber 3, and simultaneously opens the drain/drain valve 41 of the rear transition chamber 3 at time t1, preferably, t1 is about 10S, for example. In step S4, the system determines whether the opening time of the drain/drain valve 41 of the post-transition bin 3 has reached t1? If so, the system closes the drain/drain valve 41 at step S5. Then, in step S6, the system continues to determine whether the pressure in the post-transition chamber 3 and the pressure in the steam chamber 1 are balanced? If so, the system closes the steam-vent valve 41 and opens the inner gate 31 of the post-transition bin 3 at step S7 and closes the inner gate 31 after the trays are fed from the steam chamber 1 to the post-transition bin 3. And S8, the system opens the outer gate 22 of the front transition bin 2, and the outer gate 22 is closed after the tray carrying the embryo-retaining rice is input into the front transition bin 2. In step S9, the system opens the steam-bypass valves 41 of the rear transition chamber 3 and the front transition chamber 2, and introduces the steam in the rear transition chamber 3 into the front transition chamber 2, and simultaneously opens the drain/drain valve 41 of the front transition chamber 2 at time t2, preferably, t2 is about 10S, for example. In step S10, the system determines whether the opening time of the drain/drain valve 41 of the front transition bin 2 has reached t2? If so, the system closes the drain/drain valve 41 in step S11, opens the outer gate 32 of the post-transition bin 3, and closes the outer gate 32 after the finished fresh germ rice is output. Next, the system returns to step S1 to continue with the next cycle.
The time t1 and t2 are set, and the purpose is to utilize steam in the rear/front transition bin to be introduced into the front/rear transition bin through a serial pipeline so as to purge air and part of water vapor in the front/rear transition bin out of the bin.
In the processing method of fresh-keeping grains according to the invention, the data of the relationship between the steam temperature in the steam chamber 1 and the sterilization and enzyme deactivation time of the germ rice in the steam chamber 1 can be determined according to different grain varieties and processing environments, for example, the steam temperature can be selected between 110 ℃ and 150 ℃, and the sterilization and enzyme deactivation time of the germ rice can be selected between 20 seconds and 120 seconds. As will be appreciated by those skilled in the art, the above fresh food grain is intended to be representative of all types of food grain that contain germ, including brown rice, corn, sorghum, oats, wheat, and the like.
Various changes and modifications may be made therein by those skilled in the art in light of the teachings of this invention, but such changes and modifications are intended to be included within the scope of the appended claims.
Claims (7)
1. A processing method of fresh-keeping grain comprises the following steps:
A. preprocessing grain raw materials to form embryo-retaining rice;
B. the method comprises the steps that embryo-reserved rice is sent into a continuous totally-enclosed steam processing system, fresh-keeping embryo rice is formed after quick high-temperature sterilization and enzyme deactivation are carried out, the continuous totally-enclosed steam processing system comprises a steam chamber, a front transition bin connected to the inlet end of the steam chamber, and a rear transition bin connected to the outlet end of the steam chamber, the steam chamber comprises a long tank body with a conveyor belt arranged inside, an inner gate is arranged at a port connected with the steam chamber of the front transition bin and the rear transition bin, and an outer gate is arranged at the other port of the front transition bin and the rear transition bin;
C. packaging the fresh-keeping germ rice, wherein,
the step B further comprises the following steps:
B1. feeding a tray bearing the embryo-left rice into a front transition bin and closing an outer gate of the front transition bin;
B2. introducing steam into the front transition bin and opening an inner gate of the front transition bin;
B3. feeding a tray carrying the embryo-retaining rice in the front transition bin into the steam chamber, closing an inner gate of the front transition bin, and sequentially carrying out the next round of operation;
B4. conveying a tray carrying embryo-retaining rice from an inlet end to an outlet end of a steam chamber through a conveying belt, wherein the embryo-retaining rice forms fresh-keeping embryo rice in the steam chamber;
B5. introducing steam into the rear transition bin and opening an inner gate of the rear transition bin;
B6. feeding a tray carrying fresh germ rice in a steam chamber into a rear transition bin and closing an inner gate of the rear transition bin;
B7. and (3) delivering the tray bearing the fresh-keeping germ rice from the rear transition bin, closing an outer gate of the rear transition bin, and continuing the next cycle.
2. The method of claim 1, wherein the temperature of the rapid pasteurization and enzyme deactivation is controlled between 110 ℃ and 150 ℃.
3. The method of claim 1, wherein the time for rapid pasteurization and enzyme deactivation is controlled to be between 20S and 120S.
4. The method of claim 1, wherein the pre-processing comprises at least one of: checking and accepting the raw materials; entering a cleaning sieve to remove light impurities in the brown rice; dry layering separation is carried out, a brown rice aleurone layer is removed or part of brown rice aleurone layer is removed through multiple grinding, and germs are reserved; screening broken rice in germ rice by a rice screen; and (5) color selection, screening yellow rice in the germ rice, and removing foreign matters in the germ rice.
5. The method of claim 1, wherein a conveyor belt for conveying materials is arranged inside the steam chamber, the front transition bin and the rear transition bin, and a steam cross-over pipeline is arranged between the steam chamber and the front transition bin and/or the rear transition bin.
6. The method of claim 5, further comprising an evacuation device disposed in the front transition chamber and/or the rear transition chamber, the evacuation device comprising a drain/evacuation line and a drain/evacuation valve.
7. The method of claim 6, wherein sealing plates are provided between the inner gate and the port and between the outer gate and the other port to secure the inner gate and outer gate against the port.
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| CN110906725A (en) * | 2019-11-20 | 2020-03-24 | 湖北省农业机械工程研究设计院 | Sectional feeding continuous low-pressure superheated steam drying equipment and drying method |
| CN111644221A (en) * | 2020-06-19 | 2020-09-11 | 宋明 | Production process of high-quality germ rice |
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| CN2786995Y (en) * | 2005-03-23 | 2006-06-14 | 殷小春 | Tunnel type boiling machine |
| CN208354203U (en) * | 2018-06-01 | 2019-01-11 | 黑龙江省乐丰科技有限公司 | Continous way edible fungi material Full automatic sterilizing machine |
| CN110906725A (en) * | 2019-11-20 | 2020-03-24 | 湖北省农业机械工程研究设计院 | Sectional feeding continuous low-pressure superheated steam drying equipment and drying method |
| CN111644221A (en) * | 2020-06-19 | 2020-09-11 | 宋明 | Production process of high-quality germ rice |
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