Moderate processing method for rice milling section

Abstract

The invention discloses a moderate processing method for a rice milling section. The method comprises the following steps: (1) feeding; (2) rice milling; (3) rice brushing; (4) white rice color sorting: the white rice is sorted by utilizing a quality sorting identification technology of a color sorter, after sorting, the white rice meeting the processing precision flows into a white rice grading screen of a next procedure from a primary finished product port of the color sorter, and the white rice which does not meet the processing precision requirement is subjected to color sorting and then returns to a third rice milling machine to be continuously whitened, so that the white rice is obtained. The color sorter has three sorting functions; (5) white rice grading: grading the white rice subjected to color sorting according to the particle size by using a white rice grading screen, separating out whole rice and broken rice, packaging the broken rice or putting the broken rice into a broken rice bin, and enabling the whole rice to enter the next process; (6) metering; and (7) cooling the rice. According to the rice milling section moderate processing system and method, the rice milling precision can be flexibly controlled, excessive milling and moderate processing can be prevented, and the purposes of reducing broken rice, reducing power consumption and equipment loss and reserving rice nutrition can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of rice processing, and in particular to a moderate processing method for a rice milling section. Background Art

[0002] The rice processing process is generally divided into six sections: initial storage, cleaning before husking, husking, rice milling, polishing, color sorting and grading, and finished product sorting and packaging. The rice milling section is mainly to remove part or all of the cortex on the surface of brown rice to make rice that meets the standards. The new national standard GB / T 1354-2018 "Rice" divides processing accuracy into fine milling and appropriate milling. "Processing accuracy" refers to the degree of rice germ residue and the residual cortex on the surface and back groove of rice grains after processing, including "fine milling" and "appropriate milling". The judgment index of the skin retention is that the skin retention of fine milled rice is less than 2.0%, and the skin retention of appropriate milling is 2.0% to 7.0%.

[0003] The purpose of moderate processing is to prevent over-milling, which not only increases the loss of grain processing, but also deprives the rice of nutrients. However, in recent years, there has been a one-sided pursuit of "fine, white, and bright" products in my country's rice market, and over-processing of rice to make so-called refined rice. For this reason, many rice companies generally use four or even five rice mills to continuously mill rice in the rice milling process. During the rice milling process, some white rice that has reached the processing accuracy through the previous rice milling process enters the subsequent rice milling process for repeated processing, resulting in over-milling, resulting in an increase in broken rice, increased power consumption, increased equipment loss, and a large loss of rice nutrients (especially trace elements), threatening food security. Summary of the invention

[0004] The object of the present invention is to provide a moderate processing method for rice milling, which can flexibly control the rice milling precision, prevent over-milling, and perform moderate processing, so as to reduce the generation of broken rice, reduce power consumption and equipment loss, and retain rice nutrition.

[0005] In one aspect of the present invention, the present invention provides a rice milling section moderate processing system. According to an embodiment of the present invention, it includes:

[0006] A rice milling machine, wherein three rice milling machines are connected in series, and the rice milling machine is used to receive clean brown rice and lightly grind the clean brown rice;

[0007] A rice brushing machine, the rice brushing machine is connected to the last rice milling machine, and the rice brushing machine is used to clean the bran powder on the surface of the white rice after light milling;

[0008] A color sorter, the color sorter is connected to a rice brushing machine, a feed bin is arranged above the color sorter, the feed bin is divided into a primary raw grain bin, a secondary raw grain bin, and a tertiary raw grain bin, the color sorter is used to color sort the raw materials, the primary raw grain bin, the secondary raw grain bin, and the tertiary raw grain bin are used for feeding the tertiary color sorting respectively;

[0009] A white rice grading screen, the white rice grading screen is connected to the color sorter, and the white rice grading screen is used to grade the white rice after color sorting according to the particle size;

[0010] A weighing scale connected to the white rice grading screen, and the weighing scale measures the whole rice coming out of the whole rice outlet of the white rice grading screen;

[0011] A rice cooling bin is connected to the measuring scale and is used to dissipate heat and air-dry the measured white rice.

[0012] In addition, a rice milling section moderate processing system according to the above embodiment of the present invention may also have the following additional technical features:

[0013] In some embodiments of the present invention, the color sorter is provided with three color sorting processes, each color sorting process is fed by a primary raw grain bin, a secondary raw grain bin, and a tertiary raw grain bin respectively, and the color sorter is provided with 12 color sorting slots, and the ratio of the number of color sorting slots corresponding to the primary raw grain bin, the secondary raw grain bin, and the tertiary raw grain bin is 7:3:2.

[0014] In some embodiments of the present invention, a blow-out main hopper, a blow-out auxiliary hopper, a finished product hopper, and an overflow hopper are respectively installed at the outlet of the color sorting trough. The finished product hopper is installed between the blow-out main hopper and the overflow hopper, and the blow-out auxiliary hopper is installed on one side of the blow-out main hopper.

[0015] In some embodiments of the present invention, the main blowing hoppers in the three color sorting processes are respectively connected to the primary blowing pipe, the secondary blowing pipe, and the tertiary blowing pipe, the finished product hoppers in the three color sorting processes are respectively connected to the primary finished product pipe, the secondary finished product pipe, and the tertiary finished product pipe, and the blow-out auxiliary hoppers and overflow hoppers in the three color sorting processes are respectively connected to the same primary return pipe, the secondary return pipe, and the tertiary return pipe.

[0016] In some embodiments of the present invention, a lifting mechanism is further included, and the lifting mechanism includes:

[0017] The first elevator is respectively arranged between adjacent rice mills and between a rice mill and a rice brush, and the feed port of the first elevator between the second and third rice mills is connected to the discharge port of the second rice mill and the third blowing discharge pipe;

[0018] Elevator 2, the elevator 2 is arranged between the color sorter and the rice brushing machine, the feed port of the elevator 2 is connected with the discharge port of the rice brushing machine, the secondary finished product material pipe, and the primary return material pipe, and the discharge port of the elevator 2 is connected with the primary raw grain bin;

[0019] Elevator 3, the feed port of the elevator 3 is connected to the primary blow-out pipe, the secondary return pipe, and the tertiary finished product pipe, and the discharge port of the elevator 3 is connected to the secondary raw grain bin;

[0020] Elevator 4, the feed port of the elevator 4 is connected to the secondary blow-out pipe and the tertiary return pipe, and the discharge port of the elevator 3 is connected to the tertiary original grain bin;

[0021] Elevator 5, the feed port of the elevator 5 is connected to the primary finished product material pipe, and the discharge port of the elevator 5 is connected to the white rice grading screen;

[0022] Elevator 6, the feed port of the elevator 6 is connected to the metering scale, and the discharge port of the elevator 6 is connected to the cooling rice bin.

[0023] In another aspect of the present invention, the present invention proposes a moderate processing method for a rice milling section. According to an embodiment of the present invention, the method comprises the following steps:

[0024] (1) Feeding: The material comes from the previous process, and the material is clean brown rice;

[0025] (2) Rice milling: Three sand roller rice mills are used in series to perform multi-machine light milling of brown rice, and the amount of broken rice is controlled to 5-10% in each milling process;

[0026] (3) Rice brushing: Use a flexible rice brush to clean the bran powder on the surface of the white rice, making the surface of the rice grains smooth and shiny;

[0027] (4) White rice color sorting: The white rice is sorted by the quality identification technology of the color sorter. After sorting, the white rice that meets the processing precision flows into the white rice grading screen of the next process from the first finished product port of the color sorter. The white rice that does not meet the processing precision requirements returns to the third rice milling machine for further whitening after color sorting. The color sorter has three sorting functions;

[0028] (5) White rice grading: The white rice after color sorting is graded according to the particle size using a white rice grading screen to separate whole rice and broken rice. The broken rice is packaged or put into a broken rice bin, and the whole rice enters the next process;

[0029] (6) Measuring: The whole rice coming out of the whole rice outlet of the white rice grading screen is measured using a measuring scale;

[0030] (7) Cooling rice: The measured white rice is lifted by the elevator into the cooling rice bin to dissipate heat and air dry the rice, thereby lowering the rice temperature.

[0031] In addition, the moderate processing method for rice milling according to the above embodiment of the present invention may also have the following additional technical features:

[0032] In some embodiments of the present invention, in step (4), the color sorter can perform three sortings. The white rice that meets the processing precision requirements can be sorted out through one sorting, and flows into the white rice grading screen of the next process through the primary finished product material pipe of the color sorter; the white rice that does not meet the processing precision will be concentrated to the third blowing outlet after three sortings, and return to the third rice milling machine from the third blowing outlet to continue milling.

[0033] In some embodiments of the present invention, in step (4), the white rice that first enters the color sorter is the primary raw rice, and the finished product of the primary raw rice after color sorting is the white rice that meets the processing precision requirements, and flows into the white rice grading screen, and the blown-out material is the secondary raw rice, which enters the color sorter for the second color sorting; after the secondary raw rice is color sorted for the second time, the finished product returns to the primary raw rice through the secondary finished product port for color sorting, and the blown-out material is the tertiary raw rice, which enters the color sorter for the third color sorting; after the tertiary raw rice is color sorted, the finished product returns to the secondary raw rice through the tertiary finished product port for color sorting, and the blown-out material is the white rice that does not meet the processing precision requirements, and returns to the third rice milling machine for further whitening.

[0034] In some embodiments of the present invention, the working conditions of the color sorter are an air source pressure of 0.6-0.8 MPa and an output of 15-16 t / h.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] (1) By adding a rice brush, the bran powder on the surface of the white rice can be cleaned, making the surface of the rice grains smooth and shiny, and the white rice can be cooled, which is beneficial to storage. The rice brushing form can reduce the broken rice rate. In addition, the rice brush saves more than 80% of power consumption than the polishing machine, which is more energy-saving;

[0037] (2) By adding a color sorter, the white rice is sorted by using its quality identification technology. After sorting, the white rice that meets the processing precision flows into the white rice grading screen, and the white rice that does not meet the processing precision requirements returns to the third rice milling machine for further whitening after color sorting, thereby reducing the number of rice milling passes, avoiding over-milling, reducing the milling reduction rate and the increase in broken rice rate, and increasing the rice yield and the whole polished rice rate, which can retain the nutrition of rice;

[0038] (3) The quality identification technology of the color sorter is used to sort the white rice, which reduces the number of rice milling paths or the whitening pressure, thereby reducing power consumption and equipment loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a moderate processing system for a rice milling section in Embodiment 1 of the present invention;

[0040] Figure 2 is a bottom view of a partial structure of a color sorter in Embodiment 1 of the present invention;

[0041] Figure 3It is a flow chart of the rice milling section in the prior art;

[0042] Figure 4 is a flow chart of a moderate processing method for a rice milling section in Embodiment 2 of the present invention;

[0043] In the figure, 1. rice milling machine, 2. rice brushing machine, 3. color sorting machine, 301. primary raw grain bin, 302. secondary raw grain bin, 303. tertiary raw grain bin, 304. color sorting trough, 305. blow out main hopper, 306. blow out auxiliary hopper, 307. finished product hopper, 308. overflow hopper, 309. primary blow out pipe, 310. secondary blow out pipe, 311. tertiary blow out pipe, 312. primary finished product pipe, 313. secondary finished product pipe, 314. tertiary finished product, 315. primary return pipe, 316. secondary return pipe, 317. tertiary return pipe, 4. white rice grading screen, 5. weighing scale, 6. cooling rice bin, 7. elevator one, 8. elevator two, 9. elevator three, 10. elevator four, 11. elevator five, 12. elevator six. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0045] Example 1

[0046] Figure 3 This is a flow chart of the rice milling section in the prior art. The clean brown rice must be continuously milled by four rice mills, and then enter the white rice grading screen to separate the whole rice and broken rice. The whole rice is measured by a weighing scale after coming out of the white rice grading screen, and finally enters the cooling rice bin to cool the rice. Obviously, the four-pass rice milling machine is used for continuous rice milling, and the number of rice milling passes is too many, and there is over-milling. In addition, since there is no effective means for selecting the white rice after whitening, rice companies generally set the whitening pressure of the rice mill based on experience, and are worried that the rice will not meet the processing accuracy requirements if the rice is not fully whitened. Usually, a larger whitening pressure is set, resulting in more broken rice, large power consumption and equipment loss, and serious loss of rice nutrients. In addition, since there is no rice brushing process, the bran powder on the surface of the white rice cannot be cleaned well, resulting in poor white rice finish, and the temperature of the rice out of the machine is high, which affects the storage of rice and the recycling of rice bran.

[0047] like Figure 1 As shown, a rice milling section moderate processing system includes a rice milling machine 1, a rice brushing machine 2, a color sorter 3, a white rice grading screen 4, a weighing scale 5, a cooling rice bin 6, and a lifting mechanism.

[0048] Three rice mills 1 are connected in series, and the rice mill 1 is used to receive clean brown rice and perform light milling on the clean brown rice. The rice brushing machine 2 is connected to the last rice mill 1, and the rice brushing machine 2 is used to clean the bran powder on the surface of the white rice after light milling. The white rice grading screen 4 is connected to the color sorting machine 3, and the white rice grading screen 4 is used to classify the white rice after color sorting according to the particle size; the weighing scale 5 is connected to the white rice grading screen 4, and the weighing scale 5 measures the whole rice coming out of the whole rice port of the white rice grading screen 4; the cooling rice bin 6 is connected to the weighing scale 5, and the cooling rice bin 6 is used to dissipate heat and air dry the white rice after measurement.

[0049] Color sorter 3, color sorter 3 is connected to rice brushing machine 2, a feed bin is arranged above color sorter 3, and the feed bin is divided into primary raw grain bin 301, secondary raw grain bin 302, and tertiary raw grain bin 303. Color sorter 3 is used for color sorting raw materials, and primary raw grain bin 301, secondary raw grain bin 302, and tertiary raw grain bin 303 are used for feeding materials for tertiary color sorting respectively; color sorter 3 is provided with three color sorting processes, and each color sorting process is fed by primary raw grain bin 301, secondary raw grain bin 302, and tertiary raw grain bin 303 respectively. Figure 2 As shown, 12 color sorting channels 304 are arranged inside the color sorter 3, and the number ratio of the color sorting channels 304 corresponding to the primary raw grain bin 301, the secondary raw grain bin 302, and the tertiary raw grain bin 303 is 7:3:2. The outlets of the color sorting channels 304 are respectively installed with a blow-out main hopper 305, a blow-out auxiliary hopper 306, a finished product hopper 307, and an overflow hopper 308. The finished product hopper 307 is installed between the blow-out main hopper 305 and the overflow hopper 308, and the blow-out auxiliary hopper 306 is installed on one side of the blow-out main hopper 305. The blown-out materials are mainly concentrated in the blow-out main hopper 305, and the blow-out auxiliary hopper 306 is mainly used to collect the finished products blown out by the blowing nozzle system, and then return them to the original grains themselves, so as to avoid excessive carry-out ratio, that is, to reduce the number of finished products in the blown-out materials in the blow-out main hopper 305, thereby improving economic benefits. When the color sorter 3 is color sorting, the materials slide down the slideway, and a small amount of materials will bounce out. If they are not collected, it will cause economic losses, and personnel are required to clean up the leaked materials, which increases costs. The color sorter 3 is provided with an overflow hopper 308, which can collect these bounced materials in a timely and effective manner. In the end, these materials will return to their own raw materials, avoiding waste, and there is no need to be personnel to clean up the leaked materials, thereby saving costs and creating economic benefits.

[0050] The main blow-out hopper 305 in the three color sorting processes is respectively connected to the primary blow-out pipe 309, the secondary blow-out pipe 310, and the tertiary blow-out pipe 311; the finished product hopper 307 in the three color sorting processes is respectively connected to the primary finished product pipe 312, the secondary finished product pipe 313, and the tertiary finished product pipe 314; the blow-out auxiliary hopper 306 and the overflow hopper 308 in the three color sorting processes are respectively connected to the same primary return pipe 315, the secondary return pipe 316, and the tertiary return pipe 317.

[0051] The color sorter 3 is provided with two dust removal ports connected to a dust removal air net, thereby ensuring timely dust removal during the color sorting process and significantly improving the color sorting effect.

[0052] The lifting mechanism includes a lift 7, which is respectively arranged at adjacent rice milling machines 1 and between the rice milling machine 1 and the rice brushing machine 2. There are four lifts 7, (from left to right) the discharge port of the first lift 7 is connected to the feed port of the first rice milling machine 1, and the first lift 7 is used for feeding; the feed port of the second lift 7 is connected to the discharge port of the first rice milling machine 1, and the discharge port of the second lift 7 is connected to the feed port of the second rice milling machine 1; the feed port of the third lift 7 is connected to the discharge port of the second rice milling machine 1 and the tertiary blowing discharge pipe 311, and the discharge port of the third lift 7 is connected to the feed port of the third rice milling machine 1; the feed port of the fourth lift 7 is connected to the discharge port of the third rice milling machine 1, and the discharge port of the fourth lift 7 is connected to the feed port of the rice brushing machine 2.

[0053] Elevator 2 8, elevator 2 8 is arranged between color sorter 3 and rice brushing machine 2, the feed port of elevator 2 8 is connected with the discharge port of rice brushing machine 2, secondary finished product material pipe 313, primary return material pipe 315, and the discharge port of elevator 2 8 is connected with the primary raw grain bin 301; elevator 3 9, the feed port of elevator 3 9 is connected with the primary blow-out material pipe 309, the secondary return material pipe 316, and the tertiary finished product material pipe 314, and the discharge port of elevator 3 9 is connected with the secondary raw grain bin 302 ; Elevator four 10, the feed port of elevator four 10 is connected to the secondary blowing out pipe 310 and the tertiary return pipe 317, and the discharge port of elevator three 9 is connected to the tertiary raw grain bin 303; Elevator five 11, the feed port of elevator five 11 is connected to the primary finished product pipe 312, and the discharge port of elevator five 11 is connected to the white rice grading screen 4; Elevator six 12, the feed port of elevator six 12 is connected to the metering scale 5, and the discharge port of elevator six 12 is connected to the cooling rice bin 6.

[0054] Example 2

[0055] like Figure 4 As shown, a moderate processing method for a rice milling section comprises the following steps:

[0056] (1) Feeding: The material comes from the previous process, which is clean brown rice and is fed through the first elevator-7.

[0057] (2) Rice milling: Three sand roller rice mills 1 are used in series to perform multi-machine light milling of brown rice. The amount of broken rice is controlled to be 5-10% in each rice milling process. The three rice mills 1 are fed through an elevator 7.

[0058] (3) Rice brushing: The rice milled by the rice milling machine 1 will have some bran powder attached to the surface, and the temperature of the rice is high, which will affect the quality of the rice and is not conducive to rice storage. The rice after three times of rice milling enters the rice brushing machine 2 from the fourth elevator 7. The flexible rice brushing machine 2 can effectively clean the bran powder on the surface of the rice, making the surface of the rice grains smooth and shiny. The temperature of the rice after the rice brushing machine 2 can be further reduced, generally by 5°C, which is conducive to storage.

[0059] (4) Color sorting of white rice: The rice in the rice brushing machine 2 enters the primary grain bin 301 of the color sorting machine 3 through the elevator 28. The working conditions of the color sorting machine 3 are air source pressure 0.6-0.8MPa and output 15-16t / h. The white rice is sorted by the quality sorting recognition technology of the color sorting machine 3. The color sorting machine 3 can sort three times. The white rice that meets the processing accuracy requirements (referring to the degree of skin retention that meets the national standard) can be sorted out through one sorting, and flows into the white rice grading screen 4 of the next process through the primary finished product material pipe 312 of the color sorting machine 3; the white rice that does not meet the processing accuracy (referring to the degree of skin retention that does not meet the national standard) will be concentrated to the third blowing outlet after three sortings, and return to the third rice milling machine 1 from the third blowing outlet to continue whitening.

[0060] The white rice that first enters the primary raw grain bin 301 of the color sorter 3 is the primary raw grain. The finished product of the primary raw grain after color sorting is the white rice that meets the processing precision requirements. It flows into the white rice grading screen 4 through the primary finished product material pipe 312 and the elevator 5 11. The primary return material re-enters the primary raw grain bin 301 through the primary return material pipe 315 and the elevator 2 8. The primary blown-out material is the secondary raw grain, which enters the secondary raw grain bin 302 of the color sorter 3 through the primary blow-out material pipe 309 and the elevator 3 9 for the second color sorting. After the secondary raw grain is color sorted for the second time, the finished product is returned to the primary raw grain bin 301 through the secondary finished product material pipe 313 and the elevator 2 8. The secondary return material is passed through the secondary The return pipe 316 and the elevator three 9 enter the secondary raw grain bin 302 again, and the secondary blown-out material is the tertiary raw grain, which enters the tertiary raw grain bin 303 of the color sorter 3 through the secondary blow-out pipe 310 and the elevator four 10 for the third color sorting; after the tertiary raw grain is color sorted, the finished product is returned to the secondary raw grain bin 302 by the tertiary finished product material pipe 314 and the elevator three 9 for color sorting, and the tertiary return material enters the tertiary raw grain bin 303 again through the tertiary return pipe 317 and the elevator four 10 for color sorting, and the tertiary blown-out material is white rice that does not meet the processing accuracy requirements, and returns to the third rice milling machine 1 through the tertiary blow-out pipe 311 and the third elevator one 7 to continue whitening.

[0061] (5) White rice classification: The white rice from the color sorter 3 is sent to the white rice classification screen 4 through the elevator 5 11. The white rice classification screen 4 can be used to classify the white rice according to the particle size, and separate the whole rice and broken rice. The broken rice is packaged or sent to the broken rice bin, and the whole rice enters the next process.

[0062] (6) Measuring: The whole rice coming out of the whole rice outlet of the white rice grading screen 4 is measured using a measuring scale.

[0063] (7) Cooling rice: The measured white rice is lifted by the elevator 6 12 into the cooling rice bin 6, where the rice is cooled and air-dried to reduce the rice temperature.

[0064] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A moderate processing method for rice milling, characterized in that: The rice milling section is processed by a moderate processing system, and the moderate processing system for the rice milling section includes: A rice milling machine, wherein three rice milling machines are connected in series, and the rice milling machine is used to receive clean brown rice and lightly grind the clean brown rice; A rice brushing machine, the rice brushing machine is connected to the last rice milling machine, and the rice brushing machine is used to clean the bran powder on the surface of the white rice after light milling; A color sorter, the color sorter is connected to a rice brushing machine, a feed bin is arranged above the color sorter, the feed bin is divided into a primary raw grain bin, a secondary raw grain bin, and a tertiary raw grain bin, the color sorter is used to color sort the raw materials, the primary raw grain bin, the secondary raw grain bin, and the tertiary raw grain bin are used for feeding the tertiary color sorting respectively; three color sorting processes are arranged in the color sorter, each color sorting process is fed by the primary raw grain bin, the secondary raw grain bin, and the tertiary raw grain bin respectively, 12 color sorting slots are arranged inside the color sorter, and the number ratio of the color sorting slots corresponding to the primary raw grain bin, the secondary raw grain bin, and the tertiary raw grain bin is 7:3:2; The outlet of the color sorting channel is respectively equipped with a blow-out main hopper, a blow-out auxiliary hopper, a finished product hopper, and an overflow hopper. The finished product hopper is installed between the blow-out main hopper and the overflow hopper, and the blow-out auxiliary hopper is installed on one side of the blow-out main hopper; the blow-out main hoppers in the three color sorting processes are respectively connected to the primary blow-out material pipe, the secondary blow-out material pipe, and the tertiary blow-out material pipe, the finished product hoppers in the three color sorting processes are respectively connected to the primary finished product material pipe, the secondary finished product material pipe, and the tertiary finished product material pipe, and the blow-out auxiliary hoppers and the overflow hoppers in the three color sorting processes are respectively connected to the same primary return material pipe, the secondary return material pipe, and the tertiary return material pipe; A white rice grading screen, the white rice grading screen is connected to the color sorter, and the white rice grading screen is used to grade the white rice after color sorting according to the particle size; A weighing scale connected to the white rice grading screen, and the weighing scale measures the whole rice coming out of the whole rice outlet of the white rice grading screen; A rice cooling bin, which is connected to a metering scale and is used to dissipate heat and air-dry the measured white rice; A lifting mechanism, the lifting mechanism comprising: The first elevator is respectively arranged between adjacent rice mills and between a rice mill and a rice brush, and the feed port of the first elevator between the second and third rice mills is connected to the discharge port of the second rice mill and the third blowing discharge pipe; Elevator 2, the elevator 2 is arranged between the color sorter and the rice brushing machine, the feed port of the elevator 2 is connected with the discharge port of the rice brushing machine, the secondary finished product material pipe, and the primary return material pipe, and the discharge port of the elevator 2 is connected with the primary raw grain bin; Elevator 3, the feed port of the elevator 3 is connected to the primary blow-out pipe, the secondary return pipe, and the tertiary finished product pipe, and the discharge port of the elevator 3 is connected to the secondary raw grain bin; Elevator 4, the feed port of the elevator 4 is connected to the secondary blow-out pipe and the tertiary return pipe, and the discharge port of the elevator 3 is connected to the tertiary original grain bin; Elevator 5, the feed port of the elevator 5 is connected to the primary finished product material pipe, and the discharge port of the elevator 5 is connected to the white rice grading screen; Elevator 6, the feed port of the elevator 6 is connected to the metering scale, and the discharge port of the elevator 6 is connected to the cooling rice bin; The appropriate processing method specifically comprises the following steps: (1) Feeding: The material comes from the previous process, and the material is clean brown rice; (2) Rice milling: Three sand roller rice mills are used in series to perform multi-machine light milling of brown rice, and the amount of broken rice is controlled to 5-10% in each milling process; (3) Rice brushing: Use a flexible rice brush to clean the bran powder on the surface of the white rice, making the surface of the rice grains smooth and shiny; (4) Color sorting of white rice: The color sorter uses the quality identification technology of the color sorter to sort the white rice. After sorting, the white rice that meets the processing precision requirements flows into the white rice grading screen of the next process through the first finished product port of the color sorter. The white rice that does not meet the processing precision requirements returns to the third rice milling machine for further whitening after color sorting. The color sorter has a three-stage sorting function; the color sorter performs three sorting operations. The white rice that meets the processing precision requirements is sorted out through the first sorting operation and flows into the white rice grading screen of the next process through the first finished product material pipe of the color sorter; the white rice that does not meet the processing precision requirements will be concentrated in the third blowing machine after three sorting operations. The rice is then blown out of the rice sorter and returned to the third rice milling machine for further whitening. The rice that first enters the color sorter is the primary raw grain. The finished product of the primary raw grain after color sorting is the white rice that meets the processing precision requirements and flows into the white rice grading screen. The blown-out material is the secondary raw grain and enters the color sorter for the second color sorting. After the secondary raw grain is color sorted in the second color sorting, the finished product returns to the primary raw grain color sorting through the secondary finished product outlet. The blown-out material is the tertiary raw grain and enters the color sorter for the third color sorting. After the tertiary raw grain is color sorted, the finished product returns to the secondary raw grain color sorting through the tertiary finished product outlet. The blown-out material is the white rice that does not meet the processing precision requirements and returns to the third rice milling machine for further whitening. (5) White rice grading: The white rice after color sorting is graded according to the particle size using a white rice grading screen to separate whole rice and broken rice. The broken rice is packaged or put into a broken rice bin, and the whole rice enters the next process; (6) Measuring: The whole rice coming out of the whole rice outlet of the white rice grading screen is measured using a measuring scale; (7) Cooling rice: The measured white rice is lifted by the elevator into the cooling rice bin to dissipate heat and air dry the rice, thereby lowering the rice temperature.

2. A moderate processing method for rice milling according to claim 1, characterized in that: The working conditions of the color sorter are air source pressure of 0.6-0.8MPa and output of 15-16t / h.

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