Intelligent control method for directional extraction of enriched rice nutrients

Abstract

The application discloses a kind of intelligent control methods for the directional extraction of rice nutrition enrichment, by over-grinding rate, embryo retention rate, skin retention rate and other parameters, the pressure adjustment amount of each rice milling process is set, the first rice milling process and the second rice milling process coordinate, can remove brown rice skin and retain rice embryo, cooperate with the third rice milling process and the fourth rice milling process, can reduce over-grinding and mill rice embryo, the method of the application can guarantee the purity of rice embryo and the stability of product quality, realizes the reliable separation of rice embryo and rice.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural product processing in agriculture, and particularly to a method for intelligently controlling the targeted extraction of rice nutrition. BACKGROUND

[0002] The aleurone layer and the embryo are two active tissues in the structure of rice. The embryo is the main body of new life, and the aleurone layer supplies energy and various nutrients to the germinated embryo. Like the aleurone layer, the rice embryo contains complete protein including 8 essential amino acids, unsaturated fatty acids including linoleic acid and linolenic acid, high content of natural functional ingredients phytosterol, octacosanol, and oryzanol, antioxidant glutathione, vitamin E, and essential minerals K, Ca, Mg, Fe, Zn for the human body, and sufficient γ-aminobutyric acid (GABA) to reduce anxiety and promote the development of the body and nervous system.

[0003] Embryo rice can retain as much embryo as possible in the finished product, thereby improving its health value. However, the embryo of rice still inevitably falls off during the milling process. In fact, the proportion of embryo in embryo rice does not exceed 0.8%.

[0004] The proportion of embryo in brown rice is about 1.5%, but in the current actual production, the rice embryo is completely mixed into the "oil bran" or "feed" produced in the rice milling process. Some existing embryo extraction technologies cannot be applied to actual production because they cannot be industrialized.

[0005] To maximize the extraction of rice embryo from the processing process, all key problems in the processing chain must be systematically solved, which is embodied in the following three aspects:

[0006] (1) The processing target is not clear during the milling process, so it is necessary to clearly define the purpose of concentrating the rice embryo in the target process to reduce the workload of bran separation;

[0007] (2) In the existing process, the content of shoulder rice bran, which is the same size as the rice embryo, is uncertain (usually within the range of 20%-70%), and cannot be separated from the embryo, so it is necessary to build a process-controllable intelligent control system to completely separate the rice embryo from the embryo bran mixture after screening to ensure the purity of the rice embryo and the controllability of the product quality;

[0008] (3) The functional components of rice embryo are rich, and because it contains a certain amount of moisture, microorganisms, and unsaturated fatty acids, it is extremely easy to deteriorate under environmental temperature and humidity conditions, so it is necessary to perform online real-time passivation on the extracted rice embryo on the production line to ensure that the separated rice embryo remains stable and does not deteriorate. SUMMARY

[0009] The technical problem solved by the present application is to provide a directional extraction intelligent control method for enriching rice nutrition to realize reliable separation of rice germ and rice.

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

[0011] constructing a milling process comprising four rice milling sub-processes;

[0012] The rice milling pressure adjustment amount of each rice milling sub-process is calculated by the following formula:

[0013] ΔP1=(L1-50%)×(DP1 / DL1)-(M1-99.5%)×DP1 / DM1;

[0014] ΔP2={L2-[ΔP1×(DL2 / DP1)]-30%}×(DP2 / DL2)-{M2-[ΔP1×(DM2 / DP1)]-98%}×(DP2 / DM2);

[0015] ΔP3=0.5×(L3-12%)×(DP3 / DL3)+0.5×(M3-30%)×(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 sub-processes, L1-L4 are the skin retention rates of the first to fourth rice milling sub-processes, M1-M4 are the germ retention rates of the first to fourth rice milling sub-processes, G1-G4 are the over-milling rates of the first to fourth rice milling sub-processes, DP1-DP4 are the pressure value change amounts of the first to fourth rice milling sub-processes, DL1-DL4 are the change amounts of the skin retention rates of the first to fourth rice milling sub-processes, DM1-DM4 are the change amounts of the germ retention rates of the first to fourth rice milling sub-processes, and DG1-DG4 are the change amounts of the over-milling rates of the first to fourth rice milling sub-processes.

[0018] The present application sets the pressure adjustment amount of each rice milling process through parameters such as over-milling rate and embryo retention rate, the first rice milling process and the second rice milling process coordinate to remove the rice husk while retaining the rice embryo, and the third rice milling process and the fourth rice milling process can reduce over-milling and separate the rice embryo, the method of the present application can ensure the purity of the rice embryo and the controllability of the product quality, and realizes reliable separation of the rice embryo and the rice.

[0019] Further, the method of the present application further comprises:

[0020] Adjusting 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 products of the third and fourth rice milling processes are sent to a combined sieve after dust removal treatment to obtain two kinds of embryo-rice mixtures under different aperture sieve holes;

[0022] The embryo-rice mixture is subjected to passivation treatment.

[0023] The rice embryo is rich in functional components, but it is prone to spoilage under environmental temperature and humidity conditions due to the presence of a certain amount of moisture, microorganisms and unsaturated fatty acids, so the rice embryo extracted on the production line needs to be passivated in real time to ensure that the separated rice embryo remains stable and does not spoil.

[0024] In the present application, the embryo-rice mixture is subjected to passivation treatment by a passivation machine, the passivation machine comprises a body, a feed inlet is arranged at the top end of the body, the feed inlet is in communication with a roller arranged in the body, heating fins are arranged in the roller, and one side of the roller is connected with a motor output shaft.

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

[0026] At the set target temperature, the roller rotates at a set speed under the drive of the motor, and after rotating for a set time, the motor is controlled to reverse until the embryo-rice mixture in the roller is completely discharged.

[0027] Further, the method of the present application further comprises: separating the embryo-rice mixture after passivation treatment.

[0028] In order to improve the accuracy of embryo-rice separation, the specific implementation process of separating the embryo-rice mixture after passivation treatment includes:

[0029] The embryo-rice mixture after passivation treatment is sent to an embryo-rice separator, and the fan adjustment amount of the embryo-rice separator is adjusted by using the following formula: Δf=(h-h0)×(Df / Dh)-(c-c0)×(Df / Dc);

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

[0031] In the present application, the germ and bran separator comprises a machine body, a feeding port is arranged at the top of the machine body, the feeding port is communicated with a stock bin, a fan is arranged in the machine body at one side of the stock bin, and the air outlet of the fan is communicated with the stock bin; the bottom of the stock bin is communicated with a by-product discharge port, a finished product discharge port and an impurity outlet.

[0032] In the present application, the number of the impurity outlets is two, one of which is arranged at one side of the stock bin and opposite to the position of the fan, and the other is arranged at the bottom of the stock bin.

[0033] Compared with the prior art, the present application has the beneficial effects that the method of the present application can guarantee the purity of rice germ and the controllability of product quality, and realizes reliable separation of rice germ and rice bran. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a double-switch hopper structure schematic diagram of the embodiment of the present application;

[0035] Figure 2 It is a passivation machine structure schematic diagram of the embodiment of the present application;

[0036] Figure 3 It is a germ and bran separator structure schematic diagram of the embodiment of the present application;

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

[0038] Figure 5 It is a rice germ result diagram obtained after separation of the embodiment of the present application (passivated for 25 minutes at 105°C);

[0039] Figure 6 It is a rice germ result diagram obtained at different passivation degrees of the embodiment of the present application (passivated for 30 minutes at 105°C);

[0040] Wherein, 1 is the upper switch, 2 is the hopper, 3 is the lower switch, 4 is the body, 41 is the feeding port, 42 is the roller, 43 is the heating sheet, 44 is the driving motor, 5 is the machine body, 51 is the feeding port, 52 is the second impurity outlet, 53 is the hopper, 54 is the fan, 55 is the by-product outlet, 56 is the finished product outlet, 57 is the first impurity outlet, 58 is the finished product detection port, and 59 is the by-product detection port. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0042] The embodiments of the present application provide a directional extraction intelligent control method for enriching the nutrition of rice, and the specific implementation process is introduced as follows.

[0043] 1. The milling process of the rice processing line is constructed as four rice milling processes, wherein the first two processes use sand roller rice machines, and the last two processes use iron roller rice machines.

[0044] 2. An online process detection system, an edge system, intelligent clustering, an industrial internet, and a smart control cloud platform are added to the four milling processes to upgrade them to an artificial intelligence targeted milling system.

[0045] 3. The process target of the first two sand roller rice milling processes is set to "remove the husk layer of brown rice" but as much as possible "retain the rice germ", and the actual situation is taken into account to define the husk retention rate and the germ retention rate, and the allowable husk retention rate is determined to be 30%, and the germ retention rate is defined to be 98%. According to this process design, the target processes of the first (sand roller) rice milling and the second (sand roller) rice milling are as follows: the first rice milling (sand roller), the husk retention rate is ≤50%, and the germ retention rate is ≥99.5%; the second rice milling (sand roller), the husk retention rate is ≤30%, and the germ retention rate is ≥98%.

[0046] The process target of the last two iron roller rice milling processes is defined as "polishing white" and as much as possible "milling away the germ", and the husk retention rate and the germ retention rate are still defined, and the final rice milling target is defined as a husk retention rate of 8% and a germ retention rate of 2% to ensure that the germ is concentrated and milled away while ensuring that the obtained finished rice meets the "fine polishing" definition of first-class rice. According to this process design, the target processes of the third (iron roller) rice milling and the fourth (iron roller) rice milling are as follows:

[0047] The third rice milling (iron roller) has a skin retention rate of ≤12% and a germ retention rate of ≤30%; and the fourth rice milling (iron roller) has a skin retention rate of ≤8% and a germ retention rate of ≤2%.

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

[0049] The sand roller rice mill is beneficial to skin removal, and the iron roller rice mill is beneficial to germ removal.

[0050] 4. Constructing intelligent control algorithm according to the process targets of each sub-process.

[0051] Firstly, obtain each control parameter, the change rate of the skin retention rate of each pass with the change of the rice milling pressure, and the change rate of the germ retention rate of each pass with the change of the rice milling pressure; since the germ retention rate and the skin retention rate of the process targets of the last two iron roller rice milling (i.e. the third pass and the fourth pass) have the same direction control characteristics, it is necessary to introduce a suppressive control element, and the present application takes the "over-milling rate" as the suppressive element of the rice germ removal process. The definition of "over-milling" is that the rice grains neither retain the skin nor retain the germ, and the sub-parencyma layer is completely removed; and the "over-milling rate" is the percentage of the number of over-milled rice grains in the number of grains in the detection sample in the current detection round (the "skin retention rate" and the "germ retention rate" are similar).

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

[0053] According to the parameter acquisition method in "a ready-to-eat rice bran processing method and system" (a patent has been applied for, and the publication number is 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, and DP4 / DG4 are obtained; wherein:

[0054] DP1 / DL1 is the change rate of the skin retention rate of the first rice milling with the change of the pressure value of the first rice milling;

[0055] DP1 / DM1 is the change rate of the germ retention rate of the first rice milling with the change of the pressure value of the first rice milling;

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

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

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

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

[0061] DP3 / DM3 is the change rate of the third pass rice milling embryo retention rate with the change of the third pass rice milling pressure value;

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

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

[0064] DP3 / DM4 is the change rate of the fourth pass rice milling embryo retention rate with the change of the third pass rice milling pressure value;

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

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

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

[0069] The skin retention rate, the embryo retention rate and the over-milling rate are all expressed in percentage, and the rice milling pressure value is in gram-force.

[0070] The acquisition method of the above parameters is as follows (taking DP1 / DM1 and DP1 / DM2 as examples):

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

[0072] The first rice mill pressure value is increased by 10 grams, and the pressure values of the other rice mills remain unchanged. The process detection robot continuously detects the first and second rice milling processes, with each detection port detecting for 2 minutes per round, for a total of 5 rounds. The first and second rice milling embryo retention rates are obtained and averaged separately, resulting in new embryo retention rates for the first and second rice milling processes after adjusting the first rice milling pressure (10 grams), which are denoted as M1j and M2j, respectively.

[0073] 10 (grams) / (M1j - M1i), which is the change rate DP1 / DM1 of the first rice milling embryo retention rate with respect to the first rice milling pressure value; and 10 (grams) / (M2j - M2i), which is the change rate DP1 / DM2 of the second rice milling embryo retention rate with respect to the first rice milling pressure value.

[0074] To avoid the randomness of data caused by changes in incoming materials, the change adjustment range (10 grams, 20 grams, 50 grams, 100 grams) and the adjustment direction (increase, decrease) are used to continue adjusting the rice milling pressure value, and all similar values are averaged.

[0075] Using the same method, the values of DP1 / DL1, DP1 / DL2, DP2 / DL2, DP2 / DM2, and other parameters are obtained.

[0076] The incoming material flow is fixed, and the pressure values of each rice mill are fixed. The detection resources of the online process detection robot are concentrated on the third and fourth 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 are detected. The 5 embryo retention rates obtained by the robot for the third and fourth rice milling processes are averaged separately, and the embryo retention rate of the third rice milling process is denoted as M3i, and the embryo retention rate of the fourth rice milling process is denoted as M4i.

[0077] The third rice mill pressure value is increased by 10 grams, and the pressure values of the other rice mills remain unchanged. The process detection robot continuously detects the third and fourth rice milling processes, with each detection port detecting for 2 minutes per round, for a total of 5 rounds. The third and fourth rice milling embryo retention rates are obtained and averaged separately, resulting in new embryo retention rates for the third and fourth rice milling processes after adjusting the third rice milling pressure (10 grams), which are denoted as M3j and M4j, respectively.

[0078] 10 (grams) / (M3j - M3i), which is the change rate DP3 / DM3 of the third rice milling embryo retention rate with respect to the third rice milling pressure value; and 10 (grams) / (M4j - M4i), which is the change rate DP3 / DM4 of the fourth rice milling embryo retention rate with respect to the third rice milling pressure value.

[0079] To avoid the data randomness caused by the change of the incoming material, the change adjustment range (10 grams, 20 grams, 50 grams, 100 grams) and the adjustment direction (increase, decrease) continue to adjust the rice milling pressure value, and the average of all similar values is taken.

[0080] Fix the incoming material flow and the rice milling pressure value of each pass, and concentrate the detection resources of the online process detection robot on the third and fourth rice milling processes for continuous detection. Define the detection time of each detection port for each round as 2 minutes, and detect for a total of 5 rounds. Average the 5 embryo 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, respectively. The embryo retention rate, skin retention rate, and over-milling rate of the third rice milling are denoted as M3i, L3i, and G3i, respectively. The embryo retention rate, skin retention rate, and embryo retention rate of the fourth rice milling are denoted as M4i, L4i, and G4i, respectively.

[0081] Increase the rice milling pressure value of the third rice milling machine by 10 grams, and keep the pressure values of the other rice milling machines unchanged. The process detection robot continuously detects the third and fourth rice milling processes, with a detection time of 2 minutes per round for each detection port, for a total of 5 rounds. Obtain the embryo retention rate (value), skin retention rate (value), and over-milling rate (value) of the third and fourth rice milling, respectively, and take the average to obtain the new embryo 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). Denote them as M3j, M4j; L3j, L4j; G3j, G4j, respectively.

[0082] 10 (grams) / (M3j - M3i) is the change rate DP3 / DM3 of the embryo retention rate of the third rice milling with respect to the change in the third rice milling pressure value. 10 (grams) / (L3j - L3i) is the change rate DP3 / DL3 of the skin retention rate of the third rice milling with respect to the change in the third rice milling pressure value. 10 (grams) / (G3j - G3i) is the change rate DP3 / DG3 of the over-milling rate of the third rice milling with respect to the change in the third rice milling pressure value. 10 (grams) / (M4j - M4i) is the change rate DP3 / DM4 of the embryo retention rate of the fourth rice milling with respect to the change in the third rice milling pressure value. 10 (grams) / (L4j - L4i) is the change rate DP3 / DL4 of the skin retention rate of the fourth rice milling with respect to the change in the third rice milling pressure value. 10 (grams) / (G4j - G4i) is the change rate DP3 / DG4 of the over-milling rate of the fourth rice milling with respect to the change in the third rice milling pressure value.

[0083] Fix the rice milling pressure of each pass, and concentrate the detection resources of the online process detection robot on the fourth rice milling for continuous detection. The detection time for each round is still 2 minutes, and a total of 5 rounds are detected. Obtain 5 embryo retention rates (values), 5 skin retention rates (values), and 5 over-milling rates (values) for the fourth rice milling for 5 rounds, and average them respectively. Denote them as M4a, L4a, and G4a, respectively.

[0084] Increase the fourth pass rice pressure 10 grams, the other pass rice pressure value unchanged, detection of the fourth pass rice process for 5 rounds, each round 2 minutes, the fourth pass rice 5 embryo rate (value), 5 skin rate (value) and 5 over-rolled rate (value) and each average, get the new embryo rate, skin rate and over-rolled rate after increasing the fourth pass rice pressure 10 grams, respectively, M4b, L4b and G4b.

[0085] 10 (grams) / (M4b-M4a), that is, the change rate of the embryo rate of the fourth pass rice with the change of the fourth pass rice pressure value DP4 / DM4; 10 (grams) / (L4b-L4a), that is, the change rate of the skin rate of the fourth pass rice with the change of the fourth pass rice pressure value DP4 / DL4; 10 (grams) / (G4b-G4a), that is, the change rate of the skin rate of the fourth pass rice with the change of the fourth pass rice pressure value DP4 / DG4.

[0086] In order to avoid the randomness of data caused by the change of incoming materials, the change adjustment range (10 grams, 20 grams, 50 grams, 100 grams) and the adjustment direction (increase, decrease) continue to adjust the rice pressure value, and all similar values are averaged.

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

[0088] Second, build "processing technology - rice pressure" online closed loop intelligent control algorithm.

[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 pressure. Not only the change of the rice pressure of the machine can output different rice processing, but also the change of the rice pressure of the previous pass rice sub-process can make the later process output different rice processing.

[0090] The first and second passes form a coordination, aiming to remove the husk of brown rice while retaining the rice embryo; the third and fourth passes cooperate, aiming to reduce over-rolling and roll off the rice embryo; therefore, the intelligent control algorithm also takes this as a reference.

[0091] The first and second passes share an online process detection robot, and each time a round of detection is completed, the first and second equipment are adjusted and controlled once. The data obtained from the first and second pass process detection are marked as L1, L2, M1 and M2 respectively.

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

[0093] The control algorithm is:

[0094] ΔP1=(L1-50%)×(DP1 / DL1)-(M1-99.5%)×DP1 / DM1;

[0095] ΔP2={L2-[ΔP1×(DL2 / DP1)]-30%}×(DP2 / DL2)-{M2-[ΔP1×(DM2 / DP1)]-98%}×(DP2 / DM2);

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

[0097] The third and fourth rice milling share another online process detection robot, and the third and fourth devices are controlled once after each detection, and the detection data obtained by the third and fourth process detection are respectively marked as L3, L4, M3, M4, G3 and G4.

[0098] Among them, L3 is the skin retention rate of the third rice milling obtained by detection; M3 is the embryo retention rate of the third rice milling; G3 is the over-milling rate of the third rice milling; L4 is the skin retention rate of the fourth rice milling; M4 is the embryo 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×(M3-30%)×(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 respectively the third and fourth rice milling pressure adjustment amount (unit: gram force); 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 third and fourth rice milling (iron roller) is conveyed by wind power and merged into a combination screen through a sacron, and the combination screen is composed of two aperture sizes and four screen surfaces, and the aperture sizes are 18 mesh and 30 mesh, respectively. The materials (embryo and bran mixture) below the 18 mesh screen and above the 30 mesh screen are collected and merged into a temporary bin above the passivation machine.

[0104] In the embodiment of the present application, the size of the embryo can be adjusted according to the size of the embryo to adjust the aperture of the screen surface. For a large embryo, the aperture of the screen surface can be adjusted to 10 mesh.

[0105] 5. The embryo mixture is subjected to a round of passivation, and the purpose of passivation is to remove moisture and kill microorganisms.

[0106] Below the temporary warehouse and above the passivation machine, a double-switch hopper (as shown in Figure 1 ) is constructed, which has a storage capacity equal to the processing capacity of one round of the passivation machine (the structure of the passivation machine is as shown in Figure 2 ), and the switches of the hopper are associated with the time and action of the passivation round.

[0107] Figure 1 In the figure, 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, the top of the body 4 is provided with a feeding port 41, the bottom end of the feeding port 41 is in communication with a roller 42, a heating sheet 43 is arranged in the roller 42, and the roller 42 is driven by a driving motor 44. The discharge port of the roller is arranged at the same end as the feeding port, the motor is rotated in the forward direction during feeding, the material flows out of the roller port when the motor is reversed, and the other end of the roller is closed.

[0109] The passivation time and temperature of each round are set according to the characteristics of the raw materials, and the process effect is targeted at “the moisture of rice embryo is less than 3%, while the moisture of rice bran is still at a high level (8%)” to cause the maximum bulk density difference between the embryo and the rice bran; the temperature is set in combination with the biological characteristics of salmonella, coliform bacteria, staphylococcus aureus, and mold, and the killing temperature is set as the control temperature for each passivation time.

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

[0111] The working mode of the round passivation system is as follows:

[0112] (1) The “upper switch” of the hopper is opened, and the embryo bran mixture enters the hopper;

[0113] (2) When the passivation machine is feeding, the “upper switch” of the hopper is closed, the “lower switch” is opened, the “lower switch” is closed after 2 seconds, and the “upper switch” is opened;

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

[0115] (4) At the set target temperature, the passivation machine drum rotates at a set speed under the drive of the motor. The rotation is executed according to certain rules, and the rules are set according to the settings of the operator to the system, i.e. the length ratio of forward rotation and reverse rotation. The material is turned over in the drum, and reaches the set passivation time per round. The motor performs a "reverse rotation" action for 1.5 minutes, and the embryo and bran mixture is discharged from the passivation machine drum and enters the "intelligent embryo and bran separator" feed inlet.

[0116] The above actions are controlled by a chip embedded with a control program.

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

[0118] 6. The embryo and bran mixture after passivation is subjected to embryo and bran separation.

[0119] The embryo and bran mixture after passivation directly enters the intelligent embryo and bran separator hopper above the hopper. The embryo and bran separator utilizes the difference in the bulk density of the bran and embryo after passivation due to the difference in the water content, and performs air separation according to the difference. The structure is as follows Figure 3 The embryo and bran separator includes a machine body 5, the top of which is provided with a feed inlet 51, the bottom of which is in communication with a hopper 53. One side of the hopper 53 is provided with a fan 54, the outlet of which is in communication with the hopper 53. The bottom of the hopper is provided with a by-product discharge port 55, a finished product discharge port 56, and a first impurity outlet 57. One side of the hopper is provided with a second impurity outlet 52, the position of which is opposite to that of the fan. A by-product detection port 59 is arranged on the side wall of the by-product discharge port, and a finished product detection port 58 is arranged on the side wall of the finished product discharge port.

[0120] The intelligent embryo and bran separator performs an online closed-loop intelligent control mechanism of "online detection-air speed regulation". The air speed regulation mechanism is constructed according to the percentage of bran in the finished product rice embryo obtained by online detection, the percentage of rice embryo in the by-product bran, the maximum allowed bran content of the product (set by the operator), and the maximum allowed embryo content of the by-product (set by the operator).

[0121] The available control range of the fan controller is divided into 1000 parts (i.e. 1000 scale units), and each control parameter between the fan modulation and the process is obtained.

[0122] The processing material flow is fixed, and the fan controller is adjusted by 1, 5, 10, and 20 units respectively. The percentage of bran in the finished product outlet and the percentage of embryo in the by-product outlet are recorded. 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[0123] wherein, 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 allowed 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 allowed percentage of rice bran in the finished product; and the regulation rhythm is executed once per minute.

[0124] The intelligent germ-bran separation machine is combined, and the material flow channels are established between the machines, so that germ-bran separation production lines with different capacities can be formed.

[0125] On a traditional production line with sufficient bran separation and screening capacity, only the passivation system and the germ-bran separation system of the embodiment of the present application are combined, and the extraction of rice germ based on the traditional production line can also be completely realized.

[0126] The present application has been applied to actual production. Taking the processing of a certain company as an example: processing “Dachangchang No. 1”, the germ extraction rate is about 1% (based on brown rice), and the purity of germ in the product is more than 99.5%, such as Figures 4-6 .

[0127] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all the preferred embodiments and all the changes and modifications falling within the scope of the present application.

[0128] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends 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=(L1-50%)×(DP1 / DL1)-(M1-99.5%)×DP1 / DM1; ΔP2={L2-[ΔP1×(DL2 / DP1)]-30%}×(DP2 / DL2)-{M2-[ΔP1×(DM2 / DP1)]-98%}×(DP2 / DM2); ΔP3=0.5×(L3-12%)×(DP3 / DL3)+0.5×(M3-30%)×(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 germ 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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