CN111282622A - Grading processing technology of long-grain rice semi-finished product and long-grain rice processing technology - Google Patents
Grading processing technology of long-grain rice semi-finished product and long-grain rice processing technology Download PDFInfo
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- CN111282622A CN111282622A CN202010129916.2A CN202010129916A CN111282622A CN 111282622 A CN111282622 A CN 111282622A CN 202010129916 A CN202010129916 A CN 202010129916A CN 111282622 A CN111282622 A CN 111282622A
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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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- 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
- B02B3/00—Hulling; Husking; Decorticating; Polishing; Removing the awns; Degerming
- B02B3/04—Hulling; Husking; Decorticating; Polishing; Removing the awns; Degerming by means of rollers
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Abstract
The invention discloses a grading processing technology of a long-grain rice semi-finished product and a long-grain rice processing technology. Step 1: milling the long-grain brown rice, and controlling the milled rice amount to be 5-10%; step 2: removing rice bran from the material obtained in the step 1, and then removing broken rice; and step 3: selecting the materials obtained in the step 2, and reserving the skin and the germ; and 4, step 4: milling the rice with peel and embryo left selected in the step 3, and controlling the amount of broken rice to be 5-10%; and 5: removing rice bran from the material obtained in the step 4, and then removing broken rice; step 6: selecting the material obtained in the step 5, and reserving the skin and the germ; and 7: milling the rice with peel and embryo left selected in the step 6, and controlling the amount of broken rice to be 5-10%; and 8: removing rice bran from the material obtained in the step 7, and then removing broken rice; and step 9: and (5) screening the materials obtained in the step 8, and if the materials which do not meet the processing precision exist, repeating the step 7 and the step 8. The invention can improve the rice yield and reduce the generation of broken rice.
Description
Technical Field
The invention belongs to the field of long-grain rice processing, and particularly relates to a grading processing technology of a long-grain rice semi-finished product and a long-grain rice processing technology.
Background
The long-grain rice is easy to be crushed in the rice milling process due to long grain shape, so that only a sand roller is used for milling the rice to reduce crushing. According to the requirements of national standards, two indexes of broken rice and processing precision are the most important indexes. GB/T1354-.
For the existing processing technology of long-grain rice, only a grinding roller rice mill is used for peeling and degerming. In the process, two indexes of processing precision and broken rice are contradictory, if the precision of long-grain rice is achieved, pressure or the number of rice milling ways must be increased for a rice mill, so that a certain amount of broken rice is increased, and the cost is directly increased by the increase of broken rice. Meanwhile, the embryo and the skin rice are remained to the subsequent processing section, and can be taken as heterochromatic and scab grains to be removed in the color selection process, so that the carry-over ratio (the content of normal rice in impurities) is increased.
Disclosure of Invention
The invention aims to solve the problem of contradiction between precision improvement and increase of broken rice. The condition that the processing precision of long-grain rice is controlled only by a rice mill is changed, after each rice milling, the rice reaching the precision is selected by a color selector, and the rice which does not reach the precision is milled continuously. Therefore, the broken long-grain rice is prevented from being increased due to excessive rice milling or excessive mechanical processing pressure of single rice milling.
In order to achieve the above object, a first aspect of the present invention provides a classifying process for long-grain rice semi-finished products, the classifying process comprising the steps of:
step 1: milling the long-grain brown rice by a first sand roller rice mill, and controlling the amount of broken rice to be 5-10%;
step 2: removing rice bran from the material obtained in the step 1 by using a first rice brushing machine, and removing broken rice by using a first screening machine;
and step 3: selecting the materials obtained in the step 2 by a first color selector to obtain skin-remaining embryo-remaining rice;
and 4, step 4: milling the rice with the skin and embryo left selected in the step 3 by a second sand roller rice mill, and controlling the amount of broken rice to be 5-10%;
and 5: removing rice bran from the material obtained in the step 4 by using a second rice brushing machine, and removing broken rice by using a second screening machine;
step 6: selecting the materials obtained in the step 5 by a second color selector to obtain skin-remaining embryo-remaining rice;
and 7: milling the rice with the skin and embryo left selected in the step 6 by a third sand roller rice mill, and controlling the amount of broken rice to be 5-10%;
and 8: removing rice bran from the material obtained in the step 7 by a third rice brushing machine, and removing broken rice by a third screening machine;
and step 9: and (5) screening the material obtained in the step 8 by a third color selector, and if the material which does not meet the processing precision exists, repeating the step 7 and the step 8.
According to the invention, the length of the broken rice is less than or equal to 3/4 whole meters.
According to the present invention, the aspect ratio of the long-grained brown rice is > 3.
The second aspect of the invention provides a long-grain rice processing technology, which comprises the steps of classifying the semi-finished long-grain rice, metering, cooling the rice in a rice bin, mixing the rice, polishing and selecting colors to obtain the long-grain rice; the long-grain rice semi-finished product is obtained by the grading processing technology.
According to the invention, in the steps, the processing precision refers to the requirement of GB/T1354-2018 on 'fine grinding' in the processing precision, namely the rice embryo and the grain surface skin layer are removed to be 80-90%.
According to the invention, the above steps can be realized by the selection of the sand roller rice machine and the control of the operation by the skilled person.
According to the invention, the amount of broken rice removed by the screen grader exceeds 80% of the whole broken rice; compared with the whole broken rice, the removal rate of the broken rice with the length less than or equal to 1/2 whole meters exceeds 97 percent.
The invention has the advantages and positive effects that:
the sand roller rice mill can properly relax the requirement of processing precision, and only needs to ensure whiteness, and the remained skin and remained germ rice are separately processed after being selected by the color selector. The invention can improve the rice yield, reduce the generation of broken rice, and is also helpful for reducing the skin and germ remaining in the carrying-out ratio of the color selector. Many small scabs are milled by a rice mill, and the parts with the scabs are removed, so that the small scabs are converted into good rice.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the embodiment of the invention, the processing precision is that the requirement of GB/T1354-2018 on 'fine grinding' is met, namely the removal of rice embryo and grain surface skin accounts for 80-90%.
In the embodiment of the invention, the length of the broken rice is less than or equal to 3/4 whole meters.
Example 1
In the production process, the following processing technology is adopted to process the long-grain brown rice:
step 1: milling long-grain brown rice (length-width ratio is more than 3) by a first sand roller rice mill, and controlling the amount of broken rice to be 5-10%;
step 2: removing rice bran from the material obtained in the step 1 by using a first rice brushing machine, and removing broken rice by using a first screening machine;
and step 3: selecting the materials obtained in the step 2 by a first color selector to obtain skin-remaining embryo-remaining rice;
and 4, step 4: milling the rice with the skin and embryo left selected in the step 3 by a second sand roller rice mill, and controlling the amount of broken rice to be 5-10%;
and 5: removing rice bran from the material obtained in the step 4 by using a second rice brushing machine, and removing broken rice by using a second screening machine;
step 6: selecting the materials obtained in the step 5 by a second color selector to obtain skin-remaining embryo-remaining rice;
and 7: milling the rice with the skin and embryo left selected in the step 6 by a third sand roller rice mill, and controlling the amount of broken rice to be 5-10%;
and 8: removing rice bran from the material obtained in the step 7 by a third rice brushing machine, and removing broken rice by a third screening machine;
and step 9: and (5) screening the material obtained in the step 8 by a third color selector, and if the material which does not meet the processing precision exists, repeating the step 7 and the step 8.
Comparative example 1
The original process of a large-scale rice processing factory in Wuhan comprises the following steps:
rice milling machine set (3-pass sand roller rice mill), white rice grading sieve, metering, rice cooling bin, rice blending, polishing, color sorting and other conventional subsequent processes.
Through on-site processing sampling and yield analysis, compared with comparative example 1, the yield of the whole rice of example 1 is increased by 0.5%, and the ratio of the color selector is reduced to 8% from 20% (including skin, germ, lesion and good rice). The rice yield can be calculated as 20 yuan/ton per yield, the factory can process 10 ten thousand tons of rice per year, and the rice yield can generate 200 ten thousand of increment, and the effect is obvious.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (4)
1. A grading processing technology of long-grain rice semi-finished products is characterized by comprising the following steps:
step 1: milling the long-grain brown rice by a first sand roller rice mill, and controlling the amount of broken rice to be 5-10%;
step 2: removing rice bran from the material obtained in the step 1 by using a first rice brushing machine, and removing broken rice by using a first screening machine;
and step 3: selecting the materials obtained in the step 2 by a first color selector to obtain skin-remaining embryo-remaining rice;
and 4, step 4: milling the rice with the skin and embryo left selected in the step 3 by a second sand roller rice mill, and controlling the amount of broken rice to be 5-10%;
and 5: removing rice bran from the material obtained in the step 4 by using a second rice brushing machine, and removing broken rice by using a second screening machine;
step 6: selecting the materials obtained in the step 5 by a second color selector to obtain skin-remaining embryo-remaining rice;
and 7: milling the rice with the skin and embryo left selected in the step 6 by a third sand roller rice mill, and controlling the amount of broken rice to be 5-10%;
and 8: removing rice bran from the material obtained in the step 7 by a third rice brushing machine, and removing broken rice by a third screening machine;
and step 9: and (5) screening the material obtained in the step 8 by a third color selector, and if the material which does not meet the processing precision exists, repeating the step 7 and the step 8.
2. The staged processing process of claim 1, wherein the broken rice has a length of 3/4 meters or less.
3. The fractionation process according to claim 1, wherein the long-grained brown rice has an aspect ratio > 3.
4. A long-grain rice processing technology is characterized in that the method comprises the steps of classifying the semi-finished long-grain rice, metering, cooling a rice bin, mixing rice, polishing and color selecting to obtain the long-grain rice;
the long-grain rice semi-finished product is the long-grain rice semi-finished product processed by the grading processing technology of any one of claims 1 to 3.
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| CN202010129916.2A CN111282622B (en) | 2020-02-28 | 2020-02-28 | Grading processing technology of long-grain rice semi-finished product and long-grain rice processing technology |
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| CN202010129916.2A CN111282622B (en) | 2020-02-28 | 2020-02-28 | Grading processing technology of long-grain rice semi-finished product and long-grain rice processing technology |
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| CN111282622A true CN111282622A (en) | 2020-06-16 |
| CN111282622B CN111282622B (en) | 2021-10-08 |
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|---|---|---|---|---|
| CN103404801A (en) * | 2013-07-18 | 2013-11-27 | 黑龙江省农业科学院食品加工研究所 | Malted rice with remained germs, and preparation method thereof |
| CN204564202U (en) * | 2015-03-09 | 2015-08-19 | 邓国贤 | One stays embryo rice mill husk rice cell structure |
| CN106000515A (en) * | 2016-08-15 | 2016-10-12 | 无锡大东粮食工程科技有限公司 | Highland barley processing technology |
| CN106140357A (en) * | 2016-07-21 | 2016-11-23 | 广西力拓农业开发有限公司 | One stays embryo rice mill |
| CN106881171A (en) * | 2017-01-16 | 2017-06-23 | 国粮武汉科学研究设计院有限公司 | A kind of method of the coproduction processing of rice with remained germ and many grade rice |
| CN109126938A (en) * | 2018-11-02 | 2019-01-04 | 宁夏昊王米业集团有限公司 | A kind of low temperature process method for rice finished product |
-
2020
- 2020-02-28 CN CN202010129916.2A patent/CN111282622B/en active Active
Patent Citations (6)
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|---|---|---|---|---|
| CN103404801A (en) * | 2013-07-18 | 2013-11-27 | 黑龙江省农业科学院食品加工研究所 | Malted rice with remained germs, and preparation method thereof |
| CN204564202U (en) * | 2015-03-09 | 2015-08-19 | 邓国贤 | One stays embryo rice mill husk rice cell structure |
| CN106140357A (en) * | 2016-07-21 | 2016-11-23 | 广西力拓农业开发有限公司 | One stays embryo rice mill |
| CN106000515A (en) * | 2016-08-15 | 2016-10-12 | 无锡大东粮食工程科技有限公司 | Highland barley processing technology |
| CN106881171A (en) * | 2017-01-16 | 2017-06-23 | 国粮武汉科学研究设计院有限公司 | A kind of method of the coproduction processing of rice with remained germ and many grade rice |
| CN109126938A (en) * | 2018-11-02 | 2019-01-04 | 宁夏昊王米业集团有限公司 | A kind of low temperature process method for rice finished product |
Non-Patent Citations (1)
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| 蔡祖光: "碾米砂辊的选用", 《粮食加工》 * |
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