Directional extraction intelligent control method for enriching rice nutrition

Abstract

The invention discloses a directional extraction intelligent control method for enriching rice nutrition, which comprises the following steps of: setting the pressure regulating quantity of each rice milling sub-process through parameters such as over-milling rate, germ remaining rate and peel remaining rate, and coordinating the first rice milling sub-process and the second rice milling sub-process, so that the husks of brown rice can be removed and rice germs can be retained; according to the method, the first rice milling procedure and the second rice milling procedure are matched with the third rice milling procedure and the fourth rice milling procedure, excessive milling can be reduced, the rice germs are milled away, the purity of the rice germs and the stability of the product quality can be guaranteed, and reliable separation of the rice germs and the fine broken rice is achieved.

Description

Technical Field

[0001] The present invention relates to the field of agricultural product processing, and in particular to an intelligent control method for directional extraction of rice nutrients. Background Art

[0002] The aleurone layer and the germ are two active tissues in the rice structure. The germ is the core of the new life, while the aleurone layer provides energy and various nutrients to the germinated embryo. Like the aleurone layer, the rice germ contains complete protein, including all eight essential amino acids; unsaturated fatty acids, including linoleic and linolenic acid; high levels of the natural functional ingredients phytosterols, octacosanol, and oryzanol; the antioxidant glutathione and vitamin E; and the essential minerals K, Ca, Mg, Fe, and Zn. It also contains sufficient amounts of gamma-aminobutyric acid (GABA), which relieves anxiety and promotes physical and nervous system development.

[0003] Germ-infused rice maximizes the preservation of the germ, a core nutritional component, within the finished rice, thereby enhancing its health benefits. However, the germ inevitably falls off during the milling process. In reality, the germ content of germ-infused rice does not exceed 0.8%. This means that a daily intake of 15 grams of rice germ would require nearly 2 kilograms of cooked rice, a figure unattainable for a typical person in modern life.

[0004] The germ accounts for about 1.5% of brown rice. However, in current actual production, the rice germ is completely mixed into the "oil bran" or "feed" produced by the rice processing and milling process. Some existing germ extraction technologies are difficult to apply to actual production because they cannot be industrialized.

[0005] To maximize the extraction of rice germ from the processing process, it is necessary to systematically address all key issues in the processing chain, specifically in the following three aspects:

[0006] (1) The processing target during the milling process is not clear, so it is necessary to clearly concentrate the rice germ in the target milling process to reduce the workload of separating the bran;

[0007] (2) In the existing process, the content of rice bran of the same size as the rice germ is uncertain (usually in the range of 20%-70%) and cannot be separated from the germ. Therefore, it is necessary to construct a process-controllable intelligent control system to completely separate the rice germ from the screened germ bran mixture to ensure the purity of the rice germ and the controllability of its product quality.

[0008] (3) Rice germ is rich in functional components. At the same time, because it contains a certain amount of water, microorganisms and unsaturated fatty acids, it is very easy to deteriorate under ambient temperature and humidity conditions. Therefore, it is necessary to perform online real-time passivation on the rice germ extracted on the production line to ensure that the separated rice germ maintains stable properties and does not deteriorate. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide an intelligent control method for directional extraction of rice nutrients to achieve reliable separation of rice germ and raw rice in view of the shortcomings of the existing technology.

[0010] To solve the above technical problems, the technical solution adopted by the present invention is: a directional extraction intelligent control method for enriching rice nutrition, comprising the following steps:

[0011] Construct a milling process that includes four rice milling steps;

[0012] The following formula is used to calculate the rice milling pressure adjustment amount of each rice milling process:

[0013] ΔP1=(L2-50%)×(DP1 / DL1)-(G1-99.5%)×DP1 / DM1;

[0014] ΔP2={L2-[ΔP1×(DL2 / DP1)]-30%}×(DP2 / DL2)-{G2-[ΔP1×(DG2 / DP1)]-98%}×(DP2 / DM2);

[0015] ΔP3=0.5×(L3-12%)×(DP3 / DL3)+0.5×(G3-30%)×(DP3 / DM3)-(G3-3%)×(DP3 / DG3);

[0016] ΔP4=0.5×[L4-ΔP3×(DL4 / DP3)-8%]×(DP4 / DL4) +0.5×[M4-ΔP3×(DM4 / DP3)-2%]×(DP4 / DM4) -[G4-ΔP3×(DG4 / DP3)-3%]×(DP4 / DG4);

[0017] ΔP1~ΔP4 are the pressure adjustment amounts of the first to fourth rice milling processes respectively, L1~L4 are the skin retention rates of the first to fourth rice milling processes, M1~M4 are the germ retention rates of the first to fourth rice milling processes, G1~G4 are the over-milling rates of the first to fourth rice milling processes, DP1~DP4 are the pressure value changes of the first to fourth rice milling processes, DL1~DL4 are the changes of the skin retention rates of the first to fourth rice milling processes, DM1~DM4 are the changes of the germ retention rates of the first to fourth rice milling processes, and DG1~DG4 are the changes of the over-milling rates of the first to fourth rice milling processes.

[0018] The present invention sets the pressure adjustment amount of each rice milling process through parameters such as the over-milling rate and the germ retention rate. The first rice milling process and the second rice milling process work in coordination to remove the cortex of brown rice and retain the rice germ. In conjunction with the third and fourth rice milling processes, over-milling can be reduced and the rice germ can be milled away. The method of the present invention can ensure the purity of the rice germ and the controllability of the product quality, and realizes the reliable separation of the rice germ and the raw rice.

[0019] Furthermore, the method of the present invention further comprises:

[0020] Adjust the rice milling pressure of each rice milling process according to the rice milling pressure adjustment amount of each rice milling process;

[0021] The milled rice from the third and fourth milling processes is sent to a combined sieve after dust removal to obtain a mixture of embryos and bran with two sieve apertures;

[0022] The embryo-bath mixture is passivated.

[0023] Rice germ is rich in functional ingredients. At the same time, because it contains a certain amount of water, microorganisms and unsaturated fatty acids, it is very easy to deteriorate under ambient temperature and humidity conditions. Therefore, the rice germ extracted on the production line needs to be passivated online in real time to ensure that the separated rice germ maintains stable properties and does not deteriorate.

[0024] In the present invention, a passivation machine is used to passivate the embryo mixture. The passivation machine includes a main body, a feed port is provided at the top of the main body, the bottom end of the feed port is connected to a roller arranged in the main body, a heating plate is provided in the roller, and one side of the roller is connected to the motor output shaft.

[0025] In the present invention, the specific implementation process of passivating the embryo mixture includes:

[0026] At the set target temperature, the drum is driven by a motor to rotate at a set speed. After rotating for a set time, the motor is controlled to reverse until all the embryo and bran mixture in the drum is discharged.

[0027] Furthermore, the method of the present invention also includes: performing germ-bath separation on the germ-bath mixture after the passivation treatment.

[0028] In order to improve the accuracy of germ-bath separation, the specific implementation process of germ-bath separation on the germ-bath mixture after passivation treatment includes:

[0029] The germ-bath mixture after the passivation treatment is fed into a germ-bath separator, and the fan adjustment amount of the germ-bath separator is adjusted using the following formula: Δf=(h-h0)×(Df / Dh)-(c-c0)×(Df / Dc);

[0030] Among them, Δf is the wind speed adjustment amount of the fan, h is the percentage of rice germ in the by-product output from the by-product discharge port of the germ and bran separator, h0 is the maximum allowable percentage of rice germ in the by-product, c is the percentage of rice bran in the finished product output from the finished product discharge port of the germ and bran separator, c0 is the maximum allowable percentage of rice bran in the finished product, Dh is the change in the percentage of rice germ h in the by-product of the germ and bran separator when the wind speed change of the fan is Df, and Dc is the change in the percentage of rice bran c in the finished product of the germ and bran separator when the wind speed change of the fan is Df.

[0031] In the present invention, the germ and bran separator includes a body, a feed inlet is provided on the top of the body, the bottom of the feed inlet is connected to the silo, a fan is provided in the body on one side of the silo, and the fan outlet is connected to the silo; the bottom of the silo is connected to the by-product outlet, the finished product outlet, and the impurity outlet.

[0032] In the present invention, there are two impurity outlets, one of which is arranged on one side of the silo and is located opposite to the position of the fan, and the other is arranged at the bottom of the silo.

[0033] Compared with the prior art, the present invention has the following beneficial effects: the method of the present invention can ensure the purity of rice germ and the controllability of product quality, and realize the reliable separation of rice germ and raw rice. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the double-switch hopper structure according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic structural diagram of a passivation machine according to an embodiment of the present invention;

[0036] Figure 3 Schematic diagram of the structure of the embryo and husk separator according to an embodiment of the present invention;

[0037] Figure 4 This is a diagram of the material after germ extraction according to the method of the embodiment of the present invention and before germ and chaff separation after passivation;

[0038] Figure 5 This is a graph showing the rice germ separation results obtained in an embodiment of the present invention (passivated at 105°C for 25 minutes);

[0039] Figure 6 The rice germ results obtained at different passivation levels in the embodiment of the present invention (passivation at 105°C for 30 minutes);

[0040] Among them, 1 is the upper switch, 2 is the hopper, 3 is the lower switch, 4 is the main body, 41 is the feed port, 42 is the roller, 43 is the heating plate, 44 is the drive motor, 5 is the machine body, 51 is the feed port, 52 is the second impurity outlet, 53 is the silo, 54 is the fan, 55 is the by-product discharge port, 56 is the finished product discharge port, 57 is the first impurity outlet, 58 is the finished product inspection port, and 59 is the by-product inspection port. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0042] The embodiment of the present invention provides an intelligent control method for directional extraction of enriched rice nutrients, and the specific implementation process is described as follows.

[0043] 1. The milling process of the rice processing production line is constructed into four rice milling sub-processes, of which the first two use sand roller rice mills and the last two use iron roller rice mills.

[0044] 2. Add an online process detection system, edge system, intelligent cluster, industrial Internet and intelligent control cloud platform to the four grinding processes, and upgrade them to an artificial intelligence targeted grinding system.

[0045] 3. The process objectives of the first two emery roller rice milling processes are set as "removing the cortex of brown rice" but "retaining the rice germ" as much as possible. Starting from the actual situation, they are defined by the skin retention rate and the germ retention rate, and the allowed skin retention rate is determined to be 30%, and the germ retention rate is defined as 98%. According to this process design, the target processes of the first (emery roller) rice milling and the second (emery roller) rice milling are: for the first rice milling (emery roller), the skin retention rate is ≤50%, and the germ retention rate is ≥99.5%; for the second rice milling (emery roller), the skin retention rate is ≤30%, and the germ retention rate is ≥98%.

[0046] The process objectives of the last two iron roller rice milling steps are defined as "whitening" and "removing the germ" as much as possible, still defined by the husk retention rate and germ retention rate, and the final rice milling goals are defined as 8% husk retention rate and 2% germ retention rate - ensuring that the germ is concentratedly removed while still ensuring that the finished rice meets the "fine milling" definition of first-class rice. Based on this process design, the target processes of the third (iron roller) rice milling and the fourth (iron roller) rice milling are:

[0047] For the third rice milling (iron roller), the skin retention rate is ≤12%, and the germ retention rate is ≤30%; for the fourth rice milling (iron roller), the skin retention rate is ≤8%, and the germ retention rate is ≤2%.

[0048] Different raw grain processing varieties - different thickness of the outer skin, different germ mouth depth - the process objectives of each sub-process can be adjusted accordingly.

[0049] The sand roller rice mill is good for removing the husk, while the iron roller rice mill is good for removing the germ.

[0050] 4. Construct intelligent control algorithms based on the process objectives of each sub-process.

[0051] The first step is to obtain various control parameters: the rate of change of the husk retention rate in each pass as a function of milling pressure, and the rate of change of the germ retention rate in each pass as a function of milling pressure. Because the germ retention rate and husk retention rate in the final two iron roller milling passes (i.e., the third and fourth passes) have the same control characteristics, an inhibitory control element is required. This invention uses the "over-milling rate" as the inhibitory element for the germ removal process. "Over-milling" is defined as rice kernels with neither husk nor germ retained, and the subaleurone layer completely removed. The "over-milling rate" is the percentage of over-milled rice kernels in the current testing round relative to the total number of grains in the testing pattern (the "husk retention rate" and "germ retention rate" are similar).

[0052] The maximum allowable value of over-rolling rate in the target process of the third and fourth rice milling is: for the third rice milling (iron roller), the over-rolling rate is ≤3%; for the fourth rice milling (iron roller), the over-rolling rate is ≤8%.

[0053] According to the parameter acquisition method in "A method and system for processing instant rice bran" (patent applied for, publication number CN202411296311.7), DP1 / DL1, DP1 / DM1, DP1 / DL2, DP1 / DM2, DP2 / DL2, DP2 / DM2; DP3 / DL3, DP3 / DM3, DP3 / DG3, DP3 / DL4, DP3 / DM4, DP3 / DG4, DP4 / DL4, DP4 / DM4, DP4 / DG4 are obtained, among which:

[0054] DP1 / DL1 is the change rate of the rice husk retention rate in the first rice milling pass as the pressure value in the first rice milling pass changes;

[0055] DP1 / DM1 is the change rate of the germ retention rate in the first rice milling pass as the pressure value in the first rice milling pass changes;

[0056] DP1 / DL2 is the change rate of the second rice milling rice husk retention rate with the change of the first rice milling pressure value;

[0057] DP1 / DM2 is the change rate of the germ retention rate in the second rice milling process as the pressure value in the first rice milling process changes;

[0058] DP2 / DL2 is the change rate of the second-pass rice milling husk retention rate with the change of the second-pass rice milling pressure value;

[0059] DP2 / DM2 is the change rate of the second-pass rice milling germ retention rate as the second-pass rice milling pressure value changes;

[0060] DP3 / DL3 is the change rate of the third-pass rice milling husk retention rate with the change of the third-pass rice milling pressure value;

[0061] DP3 / DM3 is the change rate of the germ retention rate in the third rice milling process as the pressure value in the third rice milling process changes;

[0062] DP3 / DG3 is the rate of change of the over-milling rate of the third rice milling pass as the pressure value of the third rice milling pass changes;

[0063] DP3 / DL4 is the change rate of the fourth-pass rice milling husk retention rate with the change of the third-pass rice milling pressure value;

[0064] DP3 / DM4 is the change rate of the germ retention rate in the fourth rice milling process as the pressure value in the third rice milling process changes;

[0065] DP3 / DG4 is the rate of change of the fourth rice milling pass rate with the change of the third rice milling pressure value;

[0066] DP4 / DL4 is the change rate of the fourth-pass rice milling husk retention rate with the change of the fourth-pass rice milling pressure value;

[0067] DP4 / DM4 is the change rate of the fourth-pass rice milling germ retention rate with the change of the fourth-pass rice milling pressure value;

[0068] DP4 / DG4 is the rate of change of the fourth-pass rice milling rate with the change of the fourth-pass rice milling pressure value;

[0069] The skin retention rate, germ retention rate and over-milling rate are all expressed in percentages, and the rice milling pressure value is in grams.

[0070] The above parameters are obtained as follows (taking DP1 / DM1 and DP1 / DM2 as examples):

[0071] The feed flow rate is fixed, the rice milling pressure value of each rice milling machine is fixed separately, and the detection resources of the online process detection robot are concentrated on the first and second rice milling processes and continuously detected. The detection time of each detection port per round is defined as 2 minutes, and a total of 5 rounds of detection are performed. The 5 germ retention rates (values) of the first and second rice milling processes obtained by the robot are averaged respectively. The germ retention rate of the first rice milling process is calculated as M1i, and the germ retention rate of the second rice milling process is calculated as M2i.

[0072] The rice milling pressure value of the first rice milling machine is increased by 10 grams, and the pressure values of the other rice milling machines remain unchanged. The process detection robot continuously detects the first and second rice milling processes. Each detection port has one round for 2 minutes, for a total of 5 rounds. The germ retention rates (values) of the first and second rice milling are obtained respectively and averaged. The new germ retention rates of the first and second rice milling after adjusting the first rice milling pressure (10 grams) are obtained, which are recorded as M1j and M2j respectively.

[0073] 10 (g-force) / (M1j-M1i) is the changing rate DP1 / DM1 of the germ retention rate in the first rice milling pass as the pressure value of the first rice milling pass changes; 10 (g-force) / (M2j-M2i) is the changing rate DP1 / DM2 of the germ retention rate in the second rice milling pass as the pressure value of the first rice milling pass changes.

[0074] In order to avoid the randomness of data caused by changes in incoming materials, the adjustment amplitude (10 grams, 20 grams, 50 grams, 100 grams) and adjustment direction (increase, decrease) are changed to continue adjusting the rice milling pressure value, and the average of all similar values is taken.

[0075] Use the same method to obtain the values of parameters such as DP1 / DL1, DP1 / DL2, DP2 / DL2, and DP2 / DM2.

[0076] With fixed feed flow and pressure values for each rice milling pass, the online process inspection robot's inspection resources are concentrated on the third and fourth rice milling processes and continuously inspected. The inspection time for each inspection port is defined as 2 minutes per round, with a total of 5 inspection rounds. The 5 germ retention rates (values) of the third and fourth rice milling passes obtained by the robot are averaged. The germ retention rate of the third rice milling pass is calculated as M3i, and the germ retention rate of the fourth rice milling pass is calculated as M4i.

[0077] The rice milling pressure value of the third rice milling machine is increased by 10 grams, and the pressure values of the other rice milling machines remain unchanged. The process detection robot continuously detects the third and fourth rice milling processes. Each detection port has one round for 2 minutes, for a total of 5 rounds. The germ retention rates (values) of the third and fourth rice milling are obtained respectively and averaged. The new germ retention rates of the third and fourth rice milling after adjusting the third rice milling pressure (10 grams) are obtained, and are recorded as M3j and M4j respectively.

[0078] 10 (g-force) / (M3j-M3i) is the changing rate DP3 / DM3 of the germ retention rate of the third rice milling as the pressure value of the third rice milling changes; 10 (g-force) / (M4j-M4i) is the changing rate DP3 / DM4 of the germ retention rate of the fourth rice milling as the pressure value of the third rice milling changes.

[0079] In order to avoid the randomness of data caused by changes in incoming materials, the adjustment amplitude (10 grams, 20 grams, 50 grams, 100 grams) and adjustment direction (increase, decrease) are changed to continue adjusting the rice milling pressure value, and the average of all similar values is taken.

[0080] With fixed feed flow and pressure values for each rice milling pass, the online process inspection robot's inspection resources are concentrated on the third and fourth rice milling processes and continuously inspected. The inspection time for each round of each inspection port is defined as 2 minutes, with a total of 5 inspection rounds. The 5 germ retention rates (values), 5 skin retention rates (values), and 5 over-milling rates (values) obtained by the robot for the third and fourth rice milling passes are averaged respectively. The germ retention rate, skin retention rate, and over-milling rate of the third rice milling pass are calculated as M3i, L3i, and G3i, and the germ retention rate, skin retention rate, and germ retention rate of the fourth rice milling pass are calculated as M4i, L4i, and G4i.

[0081] The rice milling pressure value of the third rice milling machine is increased by 10 grams, and the pressure values of the other rice milling machines remain unchanged. The process detection robot continuously detects the third and fourth rice milling processes, with each detection port carrying out each round for 2 minutes, for a total of 5 rounds. The germ retention rate (value), skin retention rate (value), and over-milling rate (value) of the third and fourth rice milling are obtained respectively and averaged respectively. The new germ retention rate, skin retention rate, and over-milling rate of the third and fourth rice milling after adjusting the third rice milling pressure (10 grams) are obtained, and are recorded as M3j, M4j; L3j, L4j; G3j, G4j respectively.

[0082] 10 (gram force) / (M3j-M3i), that is, the change rate DP3 / DM3 of the germ retention rate of the third rice milling as the third rice milling pressure value changes; 10 (gram force) / (L3j-L3i), that is, the change rate DP3 / DL3 of the husk retention rate of the third rice milling as the third rice milling pressure value changes; 10 (gram force) / (G3j-G3i), that is, the change rate DP3 / DG3 of the over-milling rate of the third rice milling as the third rice milling pressure value changes; 10 (gram force) / (M4j-M4i), that is, the changing rate DP3 / DM4 of the germ retention rate of the fourth rice milling as the pressure value of the third rice milling changes; 10 (gram force) / (L4j-L4i), that is, the changing rate DP3 / DL4 of the husk retention rate of the fourth rice milling as the pressure value of the third rice milling changes; 10 (gram force) / (G4j-G4i), that is, the changing rate DP3 / DG4 of the over-milling rate of the fourth rice milling as the pressure value of the third rice milling changes.

[0083] The pressure of each rice milling stage was fixed, and the detection resources of the online process detection robot were concentrated on the fourth rice milling stage for continuous detection. The detection time of each round was still 2 minutes, and there were 5 rounds in total. Five germ retention rates (values), five skin retention rates (values) and five over-milling rates (values) of the five rounds of the fourth rice milling stage were obtained and averaged, which were recorded as M4a, L4a and G4a respectively.

[0084] The pressure of the fourth rice milling stage is increased by 10 grams, and the pressure values of other rice milling stages remain unchanged. The process of the fourth rice milling stage is tested for a total of 5 rounds, each round lasting 2 minutes. Five germ retention rates (values), five skin retention rates (values) and five over-milling rates (values) of the fourth rice milling stage are obtained and averaged respectively. The new germ retention rate, skin retention rate and over-milling rate after increasing the pressure of the fourth rice milling stage by 10 grams are obtained, and are recorded as M4b, L4b and G4b respectively.

[0085] 10 (gram force) / (M4b-M4a), that is, the changing rate DP4 / DM4 of the germ retaining rate of the fourth rice milling as the fourth rice milling pressure value changes; 10 (gram force) / (L4b-L4a), that is, the changing rate DP4 / DL4 of the husk retaining rate of the fourth rice milling as the fourth rice milling pressure value changes; 10 (gram force) / (G4b-G4a), that is, the changing rate DP4 / DG4 of the husk retaining rate of the fourth rice milling as the fourth rice milling pressure value changes.

[0086] In order to avoid the randomness of data caused by changes in incoming materials, the adjustment amplitude (10 grams, 20 grams, 50 grams, 100 grams) and adjustment direction (increase, decrease) are changed to continue adjusting the rice milling pressure value, and the average of all similar values is taken.

[0087] The above operation actions can be automatically obtained through the system's software definition.

[0088] The second step is to build an online closed-loop intelligent control algorithm for "processing technology-rice milling pressure".

[0089] After fixing the production line flow, under the condition that the raw materials to be processed have become an objective fact, the only variable affecting the processing technology is the rice milling pressure. Not only can the change of the rice milling pressure of this machine output different rice milling processes, but the change of the rice milling pressure of the previous rice milling sub-process also makes the subsequent process output different rice milling processes.

[0090] The first and second stages are coordinated to remove the cortex of brown rice while retaining the rice germ; the third and fourth stages work together to reduce over-grinding and remove the rice germ; therefore, the intelligent control algorithm also takes this as a benchmark.

[0091] The first and second rice milling processes share an online process detection robot. After each round of detection, the first and second equipment are adjusted and controlled. The data obtained from the first and second process detection are marked as L1, L2, M1, and M2 respectively.

[0092] Among them, L1 is the skin retention rate of the first rice milling obtained by the online detection robot; M1 is the germ retention rate of the first rice milling obtained by the online detection robot; L2 is the skin retention rate of the second rice milling obtained by the online detection robot; M2 is the germ retention rate of the second rice milling obtained by the online detection robot.

[0093] The control algorithm is:

[0094] ΔP1=(L2-50%)×(DP1 / DL1)-(G1-99.5%)×DP1 / DM1;

[0095] ΔP2={L2-[ΔP1×(DL2 / DP1)]-30%}×(DP2 / DL2)-{G2-[ΔP1×(DG2 / DP1)]-98%}×(DP2 / DM2);

[0096] ΔP1 and ΔP2 are the pressure adjustment values of the first and second rice milling lanes respectively, and the unit is gram-force; DL2 / DP1 is the reciprocal of the parameter DP1 / DL2, and DG2 / DP1 is the reciprocal of the parameter DP1 / DM2.

[0097] The third and fourth rice milling lines share another online process inspection robot. The third and fourth equipment are adjusted once each round of inspection is completed, and the inspection data obtained from the third and fourth process inspections are marked as L3, L4, M3, M4, G3, and G4 respectively.

[0098] Among them, L3 is the husk retention rate of the third rice milling obtained by detection; M3 is the germ retention rate of the third rice milling; G3 is the over-milling rate of the third rice milling; L4 is the husk retention rate of the fourth rice milling; M4 is the germ retention rate of the fourth rice milling; G4 is the over-milling rate of the fourth rice milling.

[0099] The control algorithm is:

[0100] ΔP3=0.5×(L3-12%)×(DP3 / DL3)+0.5×(G3-30%)×(DP3 / DM3)- (G3-3%)×(DP3 / DG3);

[0101] ΔP4=0.5×[L4-ΔP3×(DL4 / DP3)-8%]×(DP4 / DL4)+0.5×[M4-ΔP3×(DM4 / DP3)-2%]×(DP4 / DM4)-[G4-ΔP3×(DG4 / DP3)-3%]×(DP4 / DG4);

[0102] ΔP3 and ΔP4 are the third and fourth rice milling pressure adjustment values (unit: gram-force) respectively; DL4 / DP3 is the reciprocal of parameter DP3 / DL4, DM4 / DP3 is the reciprocal of parameter DP3 / DM4, and DG4 / DP3 is the reciprocal of parameter DP3 / DG4.

[0103] The milled materials from the third and fourth rice milling (iron roller) are transported by wind through Sakron and then collected into the combined screen. The combined screen consists of four screen surfaces with two apertures, 18 mesh and 30 mesh respectively. The materials (germ and bran mixture) below the 18 mesh screen and above the 30 mesh screen are collected and poured into the temporary bin above the passivator.

[0104] In the embodiment of the present invention, the aperture of the sieve surface can be adjusted according to the size of the germ to be processed. For huge germs, the aperture of the upper sieve surface can be increased to 10 mesh.

[0105] 5. The embryo residue mixture is subjected to a round-by-round passivation process. The purpose of passivation is to remove moisture and kill microorganisms.

[0106] A double-switch hopper (such as Figure 1 ), its storage capacity is equal to the processing capacity of one round of passivation machine (the structure of the passivation machine is as follows Figure 2 ), associate the switch of the hopper with the time and action of the passivation round.

[0107] Figure 1 In the middle, 1 is the upper switch, 2 is the hopper, and 3 is the lower switch.

[0108] Figure 2 In the figure, the passivation machine includes a body 4, a feed port 41 is provided at the top of the body 4, the bottom end of the feed port 41 is connected to a drum 42, a heating plate 43 is provided inside the drum 42, and the drum 42 is driven by a drive motor 44. The discharge port of the drum is set at the same end as the feed port. When feeding, the motor rotates forward, and when the motor rotates reversely, the material flows out of the drum port. The other end of the drum is closed.

[0109] The passivation time and temperature for each round are set according to the characteristics of the raw materials. The process effect aims to achieve "the moisture content of rice germ is less than 3%, while the moisture content of rice bran is still at a relatively high level (8%)" - which can cause the maximum bulk density difference between the germ and rice bran; the temperature is set in combination with the biological characteristics of Salmonella, coliform group, Staphylococcus aureus, and mold, and the killing temperature is set as the control temperature to match the passivation time of each round.

[0110] The heating element starts heating after the target temperature is set.

[0111] The turn-based intelligent passivation system works as follows:

[0112] (1) The "upper switch" of the hopper is turned on, and the embryo-battery mixture enters the hopper;

[0113] (2) When the passivation machine is feeding, the "upper switch" of the hopper is closed and the "lower switch" is opened. After 2 seconds, the "lower switch" is closed and the "upper switch" is opened;

[0114] (3) The embryo mixture in the hopper enters the passivation machine;

[0115] (4) At the set target temperature, the passivation drum rotates at a set speed driven by the motor. The rotation executes certain rules. The setting of the rules accepts the operator's setting of the system, that is, the ratio of forward and reverse rotation time. The material flips in the drum and reaches the set passivation time per round. The motor performs the "reverse" action for 1.5 minutes. The germ and hull mixture is discharged from the passivation drum and enters the feed port of the "intelligent germ and hull separator".

[0116] All of the above actions are controlled by a chip embedded with a control program.

[0117] The "upper switch" of the passivation system hopper is closed, the "lower switch" is opened, and the passivation machine enters the next round of work.

[0118] 6. Separate the germ and crumb from the passivated germ and crumb mixture.

[0119] The germ mixture after passivation directly enters the hopper above the intelligent germ separator through the material pipe. The germ separator uses the difference in moisture content between the passivated rice bran and the germ to produce the difference in bulk density between the two and performs air separation based on this difference. Its structure is as follows: Figure 3 The germ and bran separator includes a body 5, a feed inlet 51 is provided on the top of the body 5, the bottom of the feed inlet 51 is connected to the silo 53, a fan 54 is provided on one side of the silo 53, and the air outlet of the fan 54 is connected to the silo 53, a by-product discharge port 55, a finished product discharge port 56, and a first impurity outlet 57 are provided at the bottom of the silo, a second impurity outlet 52 is provided on one side of the silo, and the position of the second impurity outlet 52 is opposite to the position of the fan, a by-product detection port 59 is provided on the side wall of the by-product discharge port, and a finished product detection port 58 is provided on the side wall of the finished product discharge port.

[0120] The intelligent rice germ separator implements an online closed-loop intelligent control mechanism of "online detection-wind speed control". The wind speed control mechanism is constructed based on the percentage of rice bran in the finished rice germ, the percentage of rice germ in the by-product rice bran obtained through online detection, the maximum allowable rice bran content of the product (set by the operator), and the maximum allowable germ content of the by-product (set by the operator).

[0121] The available control range of the fan controller is divided into 1000 equal parts (i.e. 1000 scale units) to obtain the control parameters between the fan modulation and the process.

[0122] Fix the processing material flow rate, adjust the fan controller to 1, 5, 10, and 20 units respectively, and record the data of the percentage of rice bran in the finished product and the percentage of germ in the by-product. Take the average value corresponding to each scale to obtain the rate of change of the percentage of rice bran in the finished rice germ with the fan modulation amount Df / Dc, and the rate of change of the percentage of rice germ in the by-product rice bran with the fan modulation amount Df / Dh; Δf=(h-h0)×(Df / Dh)-(c-c0)×(Df / Dc).

[0123] Among them, Δf is the fan adjustment amount; h is the percentage of rice germ in the by-product obtained by the current online detection robot; h0 is the maximum allowable percentage of rice germ in the by-product; c is the percentage of rice bran in the finished product obtained by the current online detection robot; c0 is the maximum allowable percentage of rice bran in the finished product; the control rhythm is executed once per minute.

[0124] By combining intelligent germ and straw separators and establishing material flow channels between the machines, germ and straw separation production lines with different production capacities can be formed.

[0125] On a traditional production line with sufficient bran separation and screening capabilities, only the passivation system + germ separation system of the embodiment of the present invention are combined to fully realize rice germ extraction based on the traditional production line.

[0126] The present invention has been applied to actual production. For example, a company processes "Da Ting Chang No. 1", and the germ extraction rate is about 1% (based on brown rice). The germ purity in the product is above 99.5%. Figures 4 to 6 .

[0127] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0128] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A directional extraction intelligent control method for enriching rice nutrition, characterized in that, The following steps are involved: Construct a milling process that includes four rice milling steps; The following formula is used to calculate the rice milling pressure adjustment amount of each rice milling process: ΔP1=(L2-50%)×(DP1 / DL1)-(G1-99.5%)×DP1 / DM1; ΔP2={L2-[ΔP1×(DL2 / DP1)]-30%}×(DP2 / DL2)-{G2-[ΔP1×(DG2 / DP1)]-98%}×(DP2 / DM2); ΔP3=0.5×(L3-12%)×(DP3 / DL3)+0.5×(G3-30%)×(DP3 / DM3)-(G3-3%)×(DP3 / DG3); ΔP4=0.5×[L4-ΔP3×(DL4 / DP3)-8%]×(DP4 / DL4) +0.5×[M4-ΔP3×(DM4 / DP3)-2%]×(DP4 / DM4) -[G4-ΔP3×(DG4 / DP3)-3%]×(DP4 / DG4); ΔP1~ΔP4 are the pressure adjustment amounts of the first to fourth rice milling processes respectively, L1~L4 are the skin retention rates of the first to fourth rice milling processes, M1~M4 are the germ retention rates of the first to fourth rice milling processes, G1~G4 are the over-milling rates of the first to fourth rice milling processes, DP1~DP4 are the pressure value changes of the first to fourth rice milling processes, DL1~DL4 are the changes of the skin retention rates of the first to fourth rice milling processes, DM1~DM4 are the changes of the germ retention rates of the first to fourth rice milling processes, and DG1~DG4 are the changes of the over-milling rates of the first to fourth rice milling processes.

2. The directional extraction intelligent control method for enriching rice nutrition according to claim 1, wherein Also includes: Adjust the rice milling pressure of each rice milling process according to the rice milling pressure adjustment amount of each rice milling process; The milled rice from the third and fourth milling processes is sent to a combined sieve after dust removal to obtain a mixture of embryos and bran with two sieve apertures; The embryo-bath mixture is passivated.

3. The directional extraction intelligent control method for enriching rice nutrition according to claim 2, wherein The embryo mixture is passivated using a passivation machine, which includes a main body, a feed port is provided at the top of the main body, the bottom of the feed port is connected to a roller arranged in the main body, a heating plate is provided in the roller, and one side of the roller is connected to the motor output shaft.

4. The directional extraction intelligent control method for enriching rice nutrition according to claim 3, wherein The specific implementation process of passivating the embryo mixture includes: At the set target temperature, the drum is driven by a motor to rotate at a set speed. After rotating for a set time, the motor is controlled to reverse until all the embryo and bran mixture in the drum is discharged.

5. The intelligent control method for directional extraction of enriched rice nutrition according to any one of claims 2 to 4, characterized in that: Also includes: The germ-bath mixture after passivation treatment is subjected to germ-bath separation.

6. The intelligent control method for directional extraction of enriched rice nutrition according to claim 5, wherein: The specific implementation process of separating the embryo and crumb mixture after passivation treatment includes: The germ-bath mixture after the passivation treatment is fed into the germ-bath separator, and the fan adjustment amount of the germ-bath separator is adjusted using the following formula: Δf=(h-h0)×(Df / Dh)-(c-c0)×(Df / Dc); Among them, Δf is the wind speed adjustment amount of the fan, h is the percentage of rice germ in the by-product output from the by-product discharge port of the germ and bran separator, h0 is the maximum allowable percentage of rice germ in the by-product, c is the percentage of rice bran in the finished product output from the finished product discharge port of the germ and bran separator, c0 is the maximum allowable percentage of rice bran in the finished product, Df is the wind speed change of the fan, Dh is the change in the percentage of rice germ h in the by-product of the germ and bran separator when the wind speed change of the fan is Df, and Dc is the change in the percentage of rice bran c in the finished product of the germ and bran separator when the wind speed change of the fan is Df.

7. The intelligent control method for directional extraction of enriched rice nutrition according to claim 6, characterized in that: The germ and husk separator includes a body, a feed inlet is provided on the top of the body, the bottom of the feed inlet is connected to the silo, a fan is provided in the body on one side of the silo, and the fan outlet is connected to the silo; the bottom of the silo is connected to the by-product outlet, the finished product outlet, and the impurity outlet.

8. The intelligent control method for directional extraction of enriched rice nutrition according to claim 7, characterized in that: There are two impurity outlets, one of which is arranged on one side of the silo and is opposite to the position of the fan, and the other is arranged at the bottom of the silo.

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