CN108786965B - Polished rice processing method capable of reducing broken rice rate - Google Patents

Polished rice processing method capable of reducing broken rice rate Download PDF

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Publication number
CN108786965B
CN108786965B CN201810634393.XA CN201810634393A CN108786965B CN 108786965 B CN108786965 B CN 108786965B CN 201810634393 A CN201810634393 A CN 201810634393A CN 108786965 B CN108786965 B CN 108786965B
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rice
rate
grains
polishing
processing
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CN108786965A (en
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张永松
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Heilongjiang Jiansanjiang Nongken Wanshun rice Co.,Ltd.
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Guizhou Songmao Agriculture And Animal Husbandry Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02BPREPARING GRAIN FOR MILLING; REFINING GRANULAR FRUIT TO COMMERCIAL PRODUCTS BY WORKING THE SURFACE
    • B02B5/00Grain treatment not otherwise provided for
    • B02B5/02Combined processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02BPREPARING GRAIN FOR MILLING; REFINING GRANULAR FRUIT TO COMMERCIAL PRODUCTS BY WORKING THE SURFACE
    • B02B7/00Auxiliary devices

Abstract

The invention relates to the technical field of rice processing, in particular to a polished rice processing method for reducing broken rice rate.

Description

Polished rice processing method capable of reducing broken rice rate
Technical Field
The invention relates to the technical field of rice processing, in particular to a polished rice processing method for reducing broken rice rate.
Background
Rice is one of the most important staple foods in people's daily life. Along with the continuous improvement of the living standard of people, the requirements of consumers on the quality of rice are higher and higher, and the requirements on the quality of rice are not only reflected on the quality and the taste, but also higher and higher on the sensory requirements, and particularly, the rice which is excellent in quality, mellow in appearance and glittering and translucent is more favored by the consumers; the quality of the high-quality rice depends on the production area and variety of the rice, and the later processing technology plays a decisive role.
At present, the rice often needs to carry out the finish machining to the rice in the course of working, and in the finish machining in-process, because looks mutual friction between processing machinery and the corn for the temperature of rice sharply risees, has improved the temperature of rice grain of rice, leads to the inside physical properties of rice grain of rice to change, makes the grain of rice become crisp soft, breakable. Therefore, in the prior art, in the rice finish machining process, the rice is subjected to cooling auxiliary machining treatment, for example, mechanical air blowing introduced in the rice finish machining cold polishing process with patent number 200810047848.4 or a conveyor belt is added in front of a polishing machine to realize the conveying and cooling process, and the problem that the adopted two cooling auxiliary machining treatment processes are not good is solved. Moreover, in the prior art, in order to improve the nutritive value of rice and improve the eating and health care effects of rice, researchers combine special equipment and production process in the rice fine processing process to realize multiple times of grinding and steam purification treatment of rice and achieve the purpose of improving the internal structure of rice, such as the processing methods and equipment disclosed in patent nos. CN92107126.4 and CN 90102651.4. Therefore, in the prior art, the influence of the treatment process on the sensory quality of the rice in the fine processing process of the rice is researched, and meanwhile, researchers also research the processing process, the nutritional value, the edible value, the health care effect and the like of the rice. However, the processing process flow is still not ideal in the rice fine processing process, and the effect is still not ideal in the physical cooling treatment in the rice fine processing process, so that the broken rice rate of the rice is still high easily in the rice fine processing process, and the rice yield coefficient is low.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a polished rice processing method for reducing broken rice rate.
The method is realized by the following technical scheme:
the polished rice processing method for reducing broken rice rate comprises the following steps:
(1) hulling rice by using a rice huller to obtain brown rice; applying brown rice pressure of 1.2-1.8kg/m2The purified water vapor is treated for 10 to 30 seconds and then sent to the wind speed of 20m3In a blower of the/h, circularly treating for 3-5 min; placing in refrigerator at 2-6 deg.C, refrigerating for 1-3min, placing in rice mill, and whitening to obtain white rice grains;
(2) and (4) polishing the white rice grains in a polishing machine, performing color selection and packaging to finish the fine rice processing. The brown rice is subjected to purification steam treatment, then fan circulation treatment and cold storage in a refrigerator are combined, so that a cortex layer with higher toughness is formed on the surface of the brown rice, the physical structural performance in the brown rice is not damaged, the nutritional value and the fresh scent are reserved, the waist bursting rate and the rice grain breakage rate are greatly reduced after the brown rice enters a rice mill and a polishing machine, the broken rice rate of polished rice processing is reduced, and the rice yield coefficient is improved.
Preferably, the white rice grains are subjected to purification steam treatment, then are subjected to cold storage treatment in a cold storage warehouse at the temperature of 2-6 ℃ for 1-3min, and then are polished in a polishing machine. The surface of the white rice grains forms a surface layer with higher flexibility, the popping rate in the polished rice processing process and the breakage rate in the rice polishing process are reduced, the broken rice rate is reduced, the polished rice grains have round, mellow, crystal and clear pearls, and the sensory effect is better.
Preferably, the purified water vapor treatment is carried out under the pressure of 1.2-1.8kg/m2The treatment time is 10-30 s. The rice is beneficial to preventing the white rice grains from being processed thoroughly, the nutritional value and the fragrant taste of the rice are reserved, and the edible value is improved.
Preferably, the purified water vapor treatment is carried out by adopting the wind speed of 20-30m after the treatment3And after the circulation treatment of the fan for 3-5min, refrigerating the mixture in a refrigerator. The surface of the white rice grains subjected to the water vapor purification treatment can be rapidly formed, the influence on the fresh fragrance, the taste, the nutrition and the like of the white rice grains caused by long-time treatment is avoided, and the quality of the rice is ensured while the broken rice rate is reduced in the processing process.
Preferably, the step (2) is three times of polishing and three times of color sorting. Is helpful for improving the sensory effect of rice.
Preferably, the step (2) is performed by a cold storage before each polishing. Is helpful for reducing the broken rice rate.
Preferably, the temperature of the cold storage treatment of the cold storage is 2-6 ℃, and the treatment time is 1-3 min. Avoid long-time cooling to lead to the inside physical structure performance of rice grain to receive the influence, remain the faint scent of rice grain, improved the taste.
Preferably, the package is subjected to grading and screening treatment by using a grading sieve before packaging, so that the broken rice grains are screened out. Is helpful for improving the sensory effect of the packaged rice.
Preferably, the purified water vapor treatment is carried out for 20 s. The balance between the retention of fresh fragrance and nutrient components of rice grains and the broken rice rate is improved, the waist explosion rate and the rice grain breakage rate in the processing process of the polished rice are greatly reduced, and the quality of the rice is improved.
Detailed Description
The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.
In certain embodiments, a method of processing polished rice with reduced broken rice rate comprises the steps of:
(1) hulling rice by using a rice huller to obtain brown rice; applying brown rice pressure of 1.2-1.8kg/m2The purified water vapor is treated for 10 to 30 seconds and then sent to the wind speed of 20m3In a blower of the/h, circularly treating for 3-5 min; placing in refrigerator at 2-6 deg.C, refrigerating for 1-3min, placing in rice mill, and whitening to obtain white rice grains;
(2) and (4) polishing the white rice grains in a polishing machine, performing color selection and packaging to finish the fine rice processing. A protective layer is formed on the surface of the rice grains in the processing process of the rice grains, so that the influence of the temperature in the processing process on the rice grains is avoided, the processed rice grains are tidy, clean and uniform, all indexes can meet the GB1354-1986 standard, and even part of indexes are superior to the standard.
In some embodiments, the white rice grains are polished in a polishing machine after being treated with purified water vapor and then refrigerated in a refrigerator at 2-6 ℃ for 1-3 min. Ensure that the rice grains can be easily subjected to the process of generating heat under friction in the fine machining process, and the protective layer can be formed again, thereby avoiding the phenomena of embrittlement and softening of the temperature in the rice grain processing process, reducing the breakage rate of the rice grains and reducing the broken rice rate.
In some embodiments, the purified steam treatment is carried out at a pressure of 1.2 to 1.8kg/m2The treatment time is 10-30 s. The rice is beneficial to preventing the white rice grains from being processed thoroughly, the nutritional value and the fragrant taste of the rice are reserved, and the edible value is improved.
In some embodiments, the purified water vapor treatment is carried out after the treatment by adopting the wind speed of 20-30m3And after the circulation treatment of the fan for 3-5min, refrigerating the mixture in a refrigerator. The surface of the white rice grains subjected to the water vapor purification treatment can be rapidly formed, the influence on the fresh fragrance, the taste, the nutrition and the like of the white rice grains caused by long-time treatment is avoided, and the quality of the rice is ensured while the broken rice rate is reduced in the processing process.
In some embodiments, the step (2) is three polishing and three color sorting processes. Is helpful for improving the sensory effect of rice.
In certain embodiments, step (2) is performed by a refrigerator prior to each polishing. Is helpful for reducing the broken rice rate.
In some embodiments, the temperature of the cold storage treatment in the refrigerator is 2-6 ℃, and the treatment time is 1-3 min. Avoid long-time cooling to lead to the inside physical structure performance of rice grain to receive the influence, remain the faint scent of rice grain, improved the taste.
In some embodiments, the package is subjected to a classifying and screening treatment using a classifying screen before packaging, so that the broken rice grains are screened out. Is helpful for improving the sensory effect of the packaged rice.
In certain embodiments, the purified water vapor treatment is performed for 20 seconds.
According to the invention, before the brown rice is milled in the rice mill, the combination of purified steam, fan circulation treatment with a certain air speed and cold storage treatment in a cold storage is adopted, so that the influence of friction and temperature rise on rice grains is small in the milling and polishing processes of the brown rice, the change of the internal physical structural performance of the rice grains is not large, the cracking rate and the breaking rate of the rice grains in the milling process of the brown rice are reduced, the broken rice rate is reduced, the rice yield coefficient (the weight of rice output per hundred kilograms of rice) is improved, and the rice yield coefficient reaches 67%.
Especially, a layer of smooth protective layer is attached to the surface of the rice grains through the purified water vapor treatment, the protective layer can reduce the polishing times, so that the sensory effect of the rice grains is better, the friction times in the processing process of the polished rice are reduced, the damage to the rice grains is reduced, and the protective layer can be formed, so that the storage period of the rice is prolonged.
In order to verify the technical effect of the invention, the researchers carried out the following actual operation treatment on the polished rice processing method in the rice processing process in the research process.
Screening full rice grains by a winnowing machine, removing residual dry and flat rice grains in the rice grains, removing impurities from the full rice grains, and removing residual weeds and other large-particle impurities in the rice grains; removing dust in the paddy by adopting a dust removal fan; magnetic separation is carried out by adopting a magnetic separator to remove impurities such as scrap iron and the like; and removing residual stone grains in the rice according to the traditional process to obtain clean and full rice grains.
Example 1
Weighing 100kg of the obtained clean and full paddy particles, and placing the paddy particles into a rice huller for hulling treatment to obtain 82.35kg of brown rice; applying brown rice pressure of 1.2kg/m2The purified water vapor is treated for 10s, and then the air is fed at a speed of 20m3In a blower of/h, circulating for 3 min; placing in refrigerator at 2 deg.C, refrigerating for 1min, placing in rice mill, and whitening to obtain 68.13kg white rice grains; polishing the white rice grains in a polishing machine according to a traditional processing technique, carrying out color selection in a color selection machine, and packaging to obtain 64.51kg of fine processed rice.
Example 2
Weighing 100kg of the obtained clean and full rice grains, and placing the rice grains in a rice huller for hulling treatment to obtain 81.68kg of brown rice; applying brown rice pressure of 1.8kg/m2The purified water vapor is treated for 30s and then sent to the wind speed of 20m3In a blower of the/h, circulating for 5 min; placing in refrigerator at 6 deg.C, refrigerating for 3min, placing in rice mill, and whitening to obtain 67.99kg white rice grains; polishing the white rice grains in a polishing machine according to a traditional processing technique, carrying out color selection in a color selection machine, and packaging to obtain 64.37kg of fine processed rice.
Example 3
Weighing 100kg of the obtained clean and full rice grains, and placing the rice grains in a rice huller for hulling treatment to obtain 83.15kg of brown rice; applying brown rice pressure of 1.6kg/m2The purified water vapor is treated for 20s, and then the air is sent into the furnace at the air speed of 20m3In a blower of/h, circulating for 4 min; placing in refrigerator at 5 deg.C, refrigerating for 2min, placing in rice mill, and whitening to obtain 68.57kg white rice grains; polishing the white rice grains in a polishing machine according to a traditional processing technique, carrying out color selection in a color selection machine, and packaging to obtain 65.46kg of fine-processed rice.
Example 4
Weighing the above obtainedPlacing 100kg of clean and full paddy particles in a rice huller for hulling to obtain 82.33kg of brown rice; applying brown rice pressure of 1.2kg/m2Treating with purified water vapor for 10s, refrigerating in 2 deg.C refrigerator for 1min, and grinding rice in a rice mill to obtain 65.67kg white rice grains; polishing the white rice grains in a polishing machine according to a traditional processing technique, carrying out color sorting in a color sorting machine, and packaging to obtain 63.15kg of fine processed rice.
Example 5
In addition to example 1, in the white rice grain treatment process, the brown rice was treated in the brown rice treatment mode, and then polished by a polishing machine and subjected to color sorting by a color sorter, so that 68.01kg of finished rice was finally obtained.
Example 6
In addition to example 3, in the white rice grain treatment process, the brown rice was treated in the brown rice treatment mode, and then polished by a polishing machine and subjected to color sorting by a color sorter, so that 68.32kg of fine-processed rice was finally obtained.
Example 7
In addition to example 4, in the white rice grain treatment process, after the brown rice was treated in the brown rice treatment mode, polishing by a polishing machine and color selection by a color selector were performed to obtain 65.43kg of finished rice.
Example 8
On the basis of example 5, the white rice grains were subjected to three polishing and three color sorting treatments to finally obtain 67.82kg of finished rice.
Example 9
On the basis of example 5, the white rice grains were subjected to three polishing and three color sorting treatments, and from the second polishing, the white rice grains were subjected to a cooling treatment in a refrigerator at a temperature of 4 ℃ for 3 minutes before each polishing, and then to a polishing treatment, to finally obtain 67.87kg of finished rice.
Calculating rice coefficient, first-stage rice crushing rate and second-stage rice crushing rate by counting the weight of the rice, the weight of the brown rice, the weight of the rice grains in the rice processing process and the weight of the rice after finish processing adopted in the embodiment 1-9, wherein the rice coefficient refers to the percentage of the weight of the rice grains to the weight of the rice in the process from the rice to the rice grains obtaining; the first-level broken rice rate is the difference of the ratio percentage of 1 to the weight of the fine-processed rice and the brown rice in the process from the brown rice to the fine-processed rice; the second-stage broken rice rate is the percentage of the ratio of the absolute value of the weight change difference between the polished rice and the white rice grains to the white rice grains in the process from the white rice grains to the polished rice grains; the results are shown in table 1 below:
TABLE 1
The data in table 1 show that the invention can help to improve the broken rice rate, increase the rice yield coefficient, reduce the rice loss in the rice processing process and improve the economic benefit in the processing process.
The error in the experimental statistics process mainly lies in the first-level broken rice rate, and part of rice bran existing on the brown rice is contained in the first-level broken rice rate in the calculation process, so that the first-level broken rice rate is higher.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (6)

1. A processing method of polished rice capable of reducing broken rice rate is characterized by comprising the following steps:
(1) hulling rice by using a rice huller to obtain brown rice; applying brown rice pressure of 1.2-1.8kg/m2The purified water vapor is treated for 10 to 30 seconds and then sent to the wind speed of 20m3In a blower of the/h, circularly treating for 3-5 min; then placing at 2-6 deg.CRefrigerating in the refrigerator for 1-3min, placing in a rice mill, and whitening to obtain white rice grains;
(2) and (4) polishing the white rice grains in a polishing machine, performing color selection and packaging to finish the fine rice processing.
2. The polished rice processing method for reducing broken rice rate as claimed in claim 1, wherein the number of the polishing and color sorting processes in the step (2) is three.
3. The method of processing polished rice with reduced broken rice rate as claimed in claim 2, wherein in step (2), the rice kernels are subjected to cold storage in a refrigerator before each polishing.
4. The method of processing polished rice with reduced broken rice rate as claimed in claim 1, wherein the rice grains are classified and screened by a classifying screen before the packaging, so that the broken rice grains are screened out.
5. The method of processing polished rice with reduced broken rice rate as claimed in claim 1, wherein said purified steam treatment is carried out for 20 seconds.
6. Rice processed by the method of any one of claims 1 to 5.
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CN104028328B (en) * 2014-06-12 2016-02-17 贵州凤冈县神农米业有限公司 A kind of processing method reducing broken rice rate
CN104174454B (en) * 2014-07-21 2017-01-18 贵州省黎平县侗乡米业有限公司 Polished rice processing method with rice embryo content more than 80%
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Effective date of registration: 20210329

Address after: 154000 Jiansanjiang Tienan Economic Development Zone, Fujin City, Jiamusi City, Heilongjiang Province

Patentee after: Heilongjiang Jiansanjiang Nongken Wanshun rice Co.,Ltd.

Address before: 550011 Chayuan village committee, Xiping Town, Bozhou District, Zunyi City, Guizhou Province

Patentee before: GUIZHOU SONGMAO AGRICULTURE AND ANIMAL HUSBANDRY Co.,Ltd.