CN112044498A - Production and processing technology of high-quality polished rice - Google Patents
Production and processing technology of high-quality polished rice Download PDFInfo
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- CN112044498A CN112044498A CN202010782730.7A CN202010782730A CN112044498A CN 112044498 A CN112044498 A CN 112044498A CN 202010782730 A CN202010782730 A CN 202010782730A CN 112044498 A CN112044498 A CN 112044498A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02B—PREPARING GRAIN FOR MILLING; REFINING GRANULAR FRUIT TO COMMERCIAL PRODUCTS BY WORKING THE SURFACE
- B02B5/00—Grain treatment not otherwise provided for
- B02B5/02—Combined processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
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Abstract
The invention discloses a production and processing technology of high-quality polished rice, which comprises the following basic operation flows: purchasing raw grain, warehousing, feeding, removing sand, hulling rice, separating rice from brown rice, milling rice, polishing, color sorting, grading, quantitatively packaging and warehousing. The process has the innovation points that the production process is optimized, and the processing precision is adjusted, so that the grain waste caused by the excessive processing of the fine rice in the market is reduced, the loss of the nutritional ingredients of the rice is reduced, the production cost and the energy consumption of enterprises are reduced while the rice yield and the taste value are ensured, and the market competitiveness of the enterprises is further improved. The high-quality rice which is properly processed and retains more nutrition and flavor has great significance for the health of residents in China, and the rice can further save energy and reduce consumption, thereby promoting the green development of the industry.
Description
Technical Field
The invention belongs to the field of rice processing and treatment, and particularly relates to a production and processing technology of high-quality polished rice.
Background
China is the country with the largest rice planting area in the world, the rice yield accounts for 39.8% -41.2% of the total grain yield in China, more than 65% of people in China use the rice as staple food, and the annual average consumption reaches 1.2 hundred million tons, so the rice processing industry plays a significant role in the national population of China and the national food safety, and is an important ring for guaranteeing the national food safety. In recent years, the international order is rapidly deconstructed, the international relation becomes tense day by day, so that the sufficient self-sufficiency of the grains needs to be ensured, more than 10 hundred million people are occupied in China, the demand on the grains is huge, however, the cultivated land area is limited, and the grain supply is more important. However, with the improvement of the living standard of people, the market share of the fine rice is continuously increased, in order to meet the requirements of consumers, various manufacturers on the market excessively process the rice to prepare the so-called fine-processed rice, so that the rice is greatly lost, and more than 70% of nutrient components, particularly trace elements, of the excessively processed rice are lost, so that the rice processing technology needs to be optimized, the energy consumption is reduced, meanwhile, the excessive processing wind is turned, the nutrition of the rice is reserved, and the national health is promoted.
Disclosure of Invention
The present invention is directed to provide a process for producing fine rice with high quality, which can solve the problems of the prior art.
The purpose of the invention can be realized by the following technical scheme: a production and processing technology of high-quality polished rice comprises the following specific preparation steps:
the first step is as follows: the raw materials are purchased and put in storage, the paddy is inspected and weighed, and the paddy is stored in bins after the variety and the grade are noted, so that the paddy cannot be mixed and loaded.
The second step is that: feeding and screening, namely transferring the paddy to a processing workshop through a truck or conveying equipment, uniformly pouring the paddy through a discharging pit, screening out large impurities through a primary cleaning sieve, inputting the large impurities into a raw material hopper, and preparing for production. Wherein, the first preliminary cleaning is: basically removing impurities with the diameter of more than 14mm, wherein the large impurities can not contain grains, the silt removal efficiency is over 65 percent, and the light impurity removal efficiency is over 70 percent; and (5) vibrating the screen for the second time: the grain content in the large impurities is not more than 1 percent, and the grain content in the light impurities is not more than 1 grain/kg.
The third step: small-sized sand stones and mud balls contained in the rice are removed through a suction type specific gravity stoner.
The fourth step: adopt novel automatic rice huller of frequency conversion vibration feed, start rice huller equipment, wait the empty wagon normal back feeding of operation, carry out the rice hulling operation.
The fifth step: the rough rice separation is realized by adding a flat rotary rough rice separator as an auxiliary distance after a double-body rough rice separator is adopted, so that the back rice hulling is reduced, feeding is carried out after the equipment is normally operated, the material flow is regulated, the uniformity and stability are kept, and the thickness of a flow layer in the middle of a screen surface is controlled to be about 15 mm.
And a sixth step: rice milling, starting rice milling equipment, idling for a short time, feeding after normal operation, namely keeping a certain material storage in a hopper, and keeping the flow rate stable and balanced, wherein an ammeter does not exceed a specified range, the rice milling precision is checked, and the rice milling precision is compared with a standard rice sample, so that the milling precision of each rice mill is stable and unchanged, and the specified requirements are met, namely, the second milling yield is 50-60% of a first mill, the second milling yield is 40-50%, and the third milling yield is 30-35% of the first mill, 35-40% of the second mill and 30% of the third mill.
The seventh step: polishing rice, idling for a short time after starting the equipment, and feeding again after normal operation, wherein the hopper is kept for constant storage, the flow rate is stable and balanced, and the ammeter is not beyond the specified range, and the water quantity is properly adjusted to achieve the effect of 'kneading rice into a ball by hand and loosening rice automatically'.
Eighth step: and (3) selecting rice, namely enabling the rice to fall down uniformly along the grooves of the color selector, and respectively removing the grains of different colors such as black, yellow and white grains contained in the rice by using a plurality of color selectors, so that one color is realized, and the color selection effect is ensured.
The ninth step: grading rice, quantitatively packaging, accurately adjusting the content of broken rice in the rice according to the quality standard and contract requirements of the rice, and storing the prepared rice in a closed finished product rice bin after grading distribution.
Furthermore, the rice seeds are distinguished, and the rice breaking rate and the rice yield rate of the long-grain rice and the round-grain rice are different in the milling process.
Further, various japonica rice needs to be selected for sensory evaluation tests, and japonica rice varieties with higher taste values are selected as rice varieties suitable for germ-remaining rice processing.
The invention has the beneficial effects that: through optimizing production processes, the processing precision is adjusted, so that the grain waste caused by the excessive processing of the fine rice production in the market is reduced, the loss of the nutrient components of the rice is reduced, the production cost and the energy consumption of enterprises are reduced while the rice yield and the taste value are ensured, and the market competitiveness of the enterprises is further improved.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments.
Example 1
The first step is as follows: the raw materials are purchased and put in storage, the paddy is inspected and weighed, and the paddy is stored in bins after the variety and the grade are noted, so that the paddy cannot be mixed and loaded. Selecting rice as local rice (round grain type)
The second step is that: feeding and screening, namely transferring the paddy to a processing workshop through a truck or conveying equipment, uniformly pouring the paddy through a discharging pit, screening out large impurities through a primary cleaning sieve, inputting the large impurities into a raw material hopper, and preparing for production. Wherein, the first preliminary cleaning is: basically removing impurities with the diameter of more than 14mm, wherein the large impurities can not contain grains, the silt removal efficiency is over 65 percent, and the light impurity removal efficiency is over 70 percent; and (5) vibrating the screen for the second time: the grain content in the large impurities is not more than 1 percent, and the grain content in the light impurities is not more than 1 grain/kg.
The third step: small-sized sand stones and mud balls contained in the rice are removed through a suction type specific gravity stoner.
The fourth step: adopt novel automatic rice huller of frequency conversion vibration feed, start rice huller equipment, wait the empty wagon normal back feeding of operation, carry out the rice hulling operation.
The fifth step: the rough rice separation is realized by adding a flat rotary rough rice separator as an auxiliary distance after a double-body rough rice separator is adopted, so that the back rice hulling is reduced, feeding is carried out after the equipment is normally operated, the material flow is regulated, the uniformity and stability are kept, and the thickness of a flow layer in the middle of a screen surface is controlled to be about 15 mm.
And a sixth step: rice milling, starting rice milling equipment, idling for a short time, feeding after normal operation, namely keeping a certain material storage in a hopper, and keeping the flow rate stable and balanced, wherein an ammeter does not exceed a specified range, the rice milling precision is checked, and the rice milling precision is compared with a standard rice sample, so that the milling precision of each rice mill is stable and unchanged, and the specified requirements are met, namely, the second milling yield is 50-60% of a first mill, the second milling yield is 40-50%, and the third milling yield is 30-35% of the first mill, 35-40% of the second mill and 30% of the third mill.
The seventh step: polishing rice, idling for a short time after starting the equipment, and feeding again after normal operation, wherein the hopper is kept for constant storage, the flow rate is stable and balanced, and the ammeter is not beyond the specified range, and the water quantity is properly adjusted to achieve the effect of 'kneading rice into a ball by hand and loosening rice automatically'.
Eighth step: and (3) selecting rice, namely enabling the rice to fall down uniformly along the grooves of the color selector, and respectively removing the grains of different colors such as black, yellow and white grains contained in the rice by using a plurality of color selectors, so that one color is realized, and the color selection effect is ensured.
The ninth step: grading rice, quantitatively packaging, accurately adjusting the content of broken rice in the rice according to the quality standard and contract requirements of the rice, and storing the prepared rice in a closed finished product rice bin after grading distribution.
Example 2
The first step is as follows: the raw materials are purchased and put in storage, the paddy is inspected and weighed, and the paddy is stored in bins after the variety and the grade are noted, so that the paddy cannot be mixed and loaded. Selecting rice as local rice (Long grain type)
The second step is that: feeding and screening, namely transferring the paddy to a processing workshop through a truck or conveying equipment, uniformly pouring the paddy through a discharging pit, screening out large impurities through a primary cleaning sieve, inputting the large impurities into a raw material hopper, and preparing for production. Wherein, the first preliminary cleaning is: basically removing impurities with the diameter of more than 14mm, wherein the large impurities can not contain grains, the silt removal efficiency is over 65 percent, and the light impurity removal efficiency is over 70 percent; and (5) vibrating the screen for the second time: the grain content in the large impurities is not more than 1 percent, and the grain content in the light impurities is not more than 1 grain/kg.
The third step: small-sized sand stones and mud balls contained in the rice are removed through a suction type specific gravity stoner.
The fourth step: adopt novel automatic rice huller of frequency conversion vibration feed, start rice huller equipment, wait the empty wagon normal back feeding of operation, carry out the rice hulling operation.
The fifth step: the rough rice separation is realized by adding a flat rotary rough rice separator as an auxiliary distance after a double-body rough rice separator is adopted, so that the back rice hulling is reduced, feeding is carried out after the equipment is normally operated, the material flow is regulated, the uniformity and stability are kept, and the thickness of a flow layer in the middle of a screen surface is controlled to be about 15 mm.
And a sixth step: rice milling, starting rice milling equipment, idling for a short time, feeding after normal operation, namely keeping a certain material storage in a hopper, and keeping the flow rate stable and balanced, wherein an ammeter does not exceed a specified range, the rice milling precision is checked, and the rice milling precision is compared with a standard rice sample, so that the milling precision of each rice mill is stable and unchanged, and the specified requirements are met, namely, the second milling yield is 50-60% of a first mill, the second milling yield is 40-50%, and the third milling yield is 30-35% of the first mill, 35-40% of the second mill and 30% of the third mill.
The seventh step: polishing rice, idling for a short time after starting the equipment, and feeding again after normal operation, wherein the hopper is kept for constant storage, the flow rate is stable and balanced, and the ammeter is not beyond the specified range, and the water quantity is properly adjusted to achieve the effect of 'kneading rice into a ball by hand and loosening rice automatically'.
Eighth step: and (3) selecting rice, namely enabling the rice to fall down uniformly along the grooves of the color selector, and respectively removing the grains of different colors such as black, yellow and white grains contained in the rice by using a plurality of color selectors, so that one color is realized, and the color selection effect is ensured.
The ninth step: grading rice, quantitatively packaging, accurately adjusting the content of broken rice in the rice according to the quality standard and contract requirements of the rice, and storing the prepared rice in a closed finished product rice bin after grading distribution.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A production and processing technology of high-quality polished rice is characterized by comprising the following operation steps: purchasing raw grain, warehousing, feeding, removing sand, hulling rice, separating rice from brown rice, milling rice, polishing, color sorting, grading, quantitatively packaging and warehousing.
2. The production and processing technology of fine rice according to claim 1, wherein the specific preparation steps of the invention are as follows:
the first step is as follows: the raw materials are purchased and put in storage, the paddy is inspected and weighed, and the paddy is stored in bins after the variety and the grade are noted, so that the paddy cannot be mixed and loaded.
The second step is that: feeding and screening, namely transferring the paddy to a processing workshop through a truck or conveying equipment, uniformly pouring the paddy through a discharging pit, screening out large impurities through a primary cleaning sieve, and inputting the large impurities into a raw material hopper to prepare for production. Wherein, the first preliminary cleaning is sieved: basically removing impurities with the diameter of more than 14mm, wherein the large impurities can not contain grains, the silt removal efficiency is over 65 percent, and the light impurity removal efficiency is over 70 percent; and (5) vibrating the screen for the second time: the grain content in the large impurities is not more than 1 percent, and the grain content in the light impurities is not more than 1 grain/kg.
The third step: small-sized sand stones and mud balls contained in the rice are removed through a suction type specific gravity stoner.
The fourth step: adopt novel automatic rice huller of frequency conversion vibration feed, start rice huller equipment, wait the empty wagon normal back feeding of operation, carry out the rice hulling operation.
The fifth step: the rough rice separation is realized by adding a flat rotary rough rice separator as an auxiliary distance after a double-body rough rice separator is adopted, so that the back rice hulling is reduced, the material flow is regulated after the equipment is normally operated, the uniformity and the stability are kept, and the thickness of a flow layer in the middle of a sieve surface is controlled to be about 15 mm.
And a sixth step: rice milling, starting rice milling equipment, idling for a short time, feeding after normal operation, namely keeping a certain material storage in a hopper, and keeping the flow rate stable and balanced, wherein an ammeter does not exceed a specified range, the rice milling precision is checked, and the rice milling precision is compared with a standard rice sample, so that the milling precision of each rice mill is stable and unchanged, and the specified requirements are met, namely, the second milling yield is 50-60% of a first mill, the second milling yield is 40-50%, and the third milling yield is 30-35% of the first mill, 35-40% of the second mill and 30% of the third mill.
The seventh step: polishing rice, idling for a short time after starting the equipment, feeding again after running normally, wherein the hopper is kept for constant storage, the flow rate is stable and balanced, and the ammeter is not beyond the specified range.
Eighth step: and (3) rice color selection, namely enabling the rice to fall down uniformly along a groove of a color selector, and respectively removing different-color rice grains such as black, yellow and white grains contained in the rice by using a plurality of color selectors, so that one color is realized, and the color selection effect is ensured.
The ninth step: grading rice, quantitatively packaging, accurately adjusting the content of broken rice in the rice according to the quality standard and contract requirements of the rice, and storing the prepared rice in a closed finished product rice bin after grading distribution.
3. A production and processing technology of fine rice as claimed in claim 1, wherein secondary sampling inspection is performed during warehousing and unloading.
4. A fine rice producing and processing process as claimed in claim 1, wherein the screen surface is cleaned regularly to keep the opening of the screen, and the flow rate is controlled according to the impurity condition of the rice to ensure the screening effect.
5. A production and processing technology of fine rice according to claim 1, characterized in that the stone removing effect meets the following requirements: the first stone removing sand contains paddy, each kilogram of paddy contains no more than 50 grains, the second stone removing sand contains no sand, the clean paddy contains shoulder stones but no more than 1 grain/kg, and the stone removing efficiency of the two stones is more than 99%.
6. The process of claim 1, wherein the rate of rice husking during the hulling process is 80-85%, the normal flow rate is ensured, and 80-100 kg of brown rice is produced per hour per cm of rubber roller contact length.
7. The process of claim 1, wherein the brown rice should not exceed 15% in the rice hulling, the rice grain should not exceed 8 grains per kg in the unpolished rice, and the flow rate of the rice husking machine should not exceed 50% of the flow rate of the unpolished rice.
8. A high-quality polished rice production and processing process as claimed in claim 1, wherein two dust-removing energy-saving ventilators are adopted in the cleaning process.
9. A process for producing fine rice as claimed in claim 1, wherein 20% of rice husk is removed during the rice milling process, 6% to 7% of rice bran is removed, 2% to 3.5% of embryo is removed, and finally about 70% of white rice is obtained.
10. A high-quality polished rice production and processing technology as claimed in claim 1, wherein the rice at the discharge port is inspected at any time during the polishing process to meet the requirement of no bran powder.
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| CN202010782730.7A CN112044498A (en) | 2020-08-06 | 2020-08-06 | Production and processing technology of high-quality polished rice |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742702A (en) * | 2021-02-02 | 2021-05-04 | 江苏长寿集团如皋广兴米业有限公司 | Automatic rice cleaning device and rice processing technology |
| CN116673082A (en) * | 2023-06-06 | 2023-09-01 | 安徽稼仙金佳粮集团股份有限公司 | Rice processing production line and rice processing technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112742702A (en) * | 2021-02-02 | 2021-05-04 | 江苏长寿集团如皋广兴米业有限公司 | Automatic rice cleaning device and rice processing technology |
| CN116673082A (en) * | 2023-06-06 | 2023-09-01 | 安徽稼仙金佳粮集团股份有限公司 | Rice processing production line and rice processing technology |
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