CN114130450A - Low-arsenic rice and preparation method thereof - Google Patents
Low-arsenic rice and preparation method thereof Download PDFInfo
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- CN114130450A CN114130450A CN202111412236.2A CN202111412236A CN114130450A CN 114130450 A CN114130450 A CN 114130450A CN 202111412236 A CN202111412236 A CN 202111412236A CN 114130450 A CN114130450 A CN 114130450A
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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
- B02B1/00—Preparing grain for milling or like processes
- B02B1/02—Dry treatment
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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
- B02B1/00—Preparing grain for milling or like processes
- B02B1/08—Conditioning grain with respect to temperature or water content
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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
- B02B7/00—Auxiliary devices
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Abstract
The invention belongs to the technical field of rice preparation, and particularly relates to low-arsenic rice and a preparation method thereof. The invention provides a preparation method of rice with low arsenic content, which comprises the following steps: removing hulls, and processing the harvested rice to obtain brown rice; rice milling: processing the obtained brown rice to obtain polished rice; primary dearsenization: carrying out ultrasonic washing on the obtained polished rice to obtain primary processed rice; and (3) removing arsenic again: soaking the obtained primary processed rice in tea polyphenols solution to obtain rice with low arsenic content. The invention reduces the arsenic content in the rice through multiple arsenic removal steps.
Description
Technical Field
The invention belongs to the technical field of rice preparation, and particularly relates to low-arsenic rice and a preparation method thereof.
Background
The rice is a finished product prepared by the working procedures of rice cleaning, rice hulling, rice milling, finished product finishing and the like. The cleaning process is to remove various impurities mixed in the rice by proper equipment through proper process flow and proper operation method so as to improve the quality of the finished rice product, and simultaneously, iron nails, scrap iron and the like in the rice are removed by using magnets so as to ensure the production safety. The rice hulling step is to hulle the rice by a rubber roller huller or a carborundum huller and separate the chaff from the brown rice. The rice milling process is to grind and rub the brown rice by a rice mill to separate the cortex from the endosperm, and then to perform the treatments of rice brushing, bran removal, crushing, rice airing and the like, thus obtaining the rice with required grade.
Due to the development of industry, environmental changes cause more and more pollutants in soil, water sources and atmosphere, in rice planting, the enrichment amount of harmful elements in rice is high, particularly the arsenic content is easily higher than the national standard content, the arsenic enters the human body, and the arsenic possibly interacts with protein to influence or even change the inherent structure and function of protein molecules. Therefore, in rice processing, arsenic content is greatly reduced.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect of overhigh arsenic content of rice in the prior art, thereby providing the low-arsenic rice and the preparation method thereof.
The invention provides the following technical scheme.
The invention provides a preparation method of rice with low arsenic content, which is characterized by comprising the following steps:
removing hulls, and processing the harvested rice to obtain brown rice;
rice milling: processing the obtained brown rice to obtain polished rice;
primary dearsenization: carrying out ultrasonic washing on the obtained polished rice to obtain primary processed rice;
and (3) removing arsenic again: soaking the obtained primary processed rice in tea polyphenols solution to obtain rice with low arsenic content.
Optionally, in the rice milling step, the processing includes the following steps:
cleaning, drying, shelling, separating brown rice and selecting brown rice.
Optionally, the cleaning step includes that the paddy enters the production line from the grain discharging pit, coarse impurities are removed through a primary cleaning process, large impurities, medium impurities, small impurities and light impurities are removed through a screening process, impurities such as masonry and the like are removed through a stone removing process, and the paddy is lifted to a clean paddy temporary storage bin after magnetic metal impurities are removed through a magnetic separation process.
Optionally, in the drying step, if the rice needs to be dried, the rice in the rough rice temporary storage bin is lifted to enter a drying process, and after drying, tempering and cooling for a certain time, the rice which reaches the requirement of moisture is discharged and lifted to the clean rice hucho storage bin.
Optionally, the husking step includes husking the rice meeting the requirement for moisture by a rice husking machine, separating the rice husk mixture from the rice husk separator into rice husk and rice husk separation processes, and arranging a rice husk grain extractor in a rice husk wind net for separating grains, green and white pieces and coarse and broken grains mixed into the rice husks. In order to reduce the damage to the brown rice as much as possible and ensure the quality of the brown rice product, the hulling rate is controlled to be about 80% in the production operation. In order to minimize the entrainment of grains by the rice hull air grid, the grain mixture is allowed to contain a small amount of rice hulls during the specific production operation. In order to reduce the increase of breakage in the husking process, the brown rice factory which processes the rice more than 300t daily can adopt 1 ridge rice machine to process by returning the ridge rice alone.
Optionally, the husking step includes that the sieve surface on the uppermost layer of the grain-coarse separation horizontal rotating sieve is used for controlling the indexes of returning grains, and the sieve surface on the lowermost layer is used for sieving broken coarse grains and has the functions of grain-coarse separation and brown rice selection. The mixture enters a gravity grain and rough separator to separate qualified clean rough, and the mixture returns to a grain and rough separation horizontal rotating sieve and the machine respectively.
Optionally, in the step of removing arsenic again, the tea polyphenol solution is a solution obtained by soaking tea leaves.
The invention also provides rice with low arsenic content, which is obtained by adopting the preparation method.
The technical scheme of the invention has the following advantages:
the invention provides a preparation method of rice with low arsenic content, which comprises the following steps: removing hulls, and processing the harvested rice to obtain brown rice; rice milling: processing the obtained brown rice to obtain polished rice; primary dearsenization: carrying out ultrasonic washing on the obtained polished rice to obtain primary processed rice; and (3) removing arsenic again: soaking the obtained primary processed rice in tea polyphenols solution to obtain rice with low arsenic content. The invention reduces the arsenic content in the rice through multiple arsenic removal steps.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
Example 1
This example provides a method for preparing low arsenic rice, comprising the following steps,
firstly, rice enters a production line from a grain discharging pit, coarse impurities are removed through a primary cleaning process, large impurities, medium impurities, small impurities and light impurities are removed through a screening process, impurities such as masonry and the like are removed through a stone removing process, and the rice is lifted to a clean rice temporary storage bin after magnetic metal impurities are removed through a magnetic separation process. If the paddy needs to be dried, the paddy in the rough paddy temporary storage bin is lifted to enter a drying procedure, and after drying, tempering and cooling for a certain time, the paddy which meets the requirement of moisture is discharged out of the machine and is lifted to a pure paddy hucho storage bin. The rice with the water content meeting the requirement is hulled by a rice huller, a rice husk mixture separated by a rice husk separator enters a rice husk separation process, a rice husk grain extractor is arranged in a rice husk wind net and used for separating grains mixed into rice husks, green and white pieces and broken rice. In order to reduce the damage to the brown rice as much as possible and ensure the quality of the brown rice product, the hulling rate is controlled to be about 80% in the production operation. In order to minimize the entrainment of grains by the rice hull air grid, the grain mixture is allowed to contain a small amount of rice hulls during the specific production operation. In order to reduce the increase of breakage in the husking process, the brown rice factory which processes the rice more than 300t daily can adopt 1 ridge rice machine to process by returning the ridge rice alone. The uppermost layer of the sieve surface of the grain-coarse separation rotary sieve is used for controlling the indexes of returning grains, and the lowermost layer of the sieve surface is used for sieving out coarse particles and has the functions of grain-coarse separation and brown rice selection. The mixture enters a gravity grain and rough separator to separate qualified clean rough, and the mixture returns to a grain and rough separation horizontal rotating sieve and the machine respectively. Obtaining the brown rice. Processing the obtained brown rice to obtain polished rice; carrying out ultrasonic washing on the obtained polished rice to obtain primary processed rice; soaking the obtained primary processed rice in the solution after soaking tea to obtain rice with low arsenic content.
Example 2
This example provides a method for preparing low arsenic rice, comprising the following steps,
firstly, rice enters a production line from a grain discharging pit, coarse impurities are removed through a primary cleaning process, large impurities, medium impurities, small impurities and light impurities are removed through a screening process, impurities such as masonry and the like are removed through a stone removing process, and the rice is lifted to a clean rice temporary storage bin after magnetic metal impurities are removed through a magnetic separation process. If the paddy needs to be dried, the paddy in the rough paddy temporary storage bin is lifted to enter a drying procedure, and after drying, tempering and cooling for a certain time, the paddy which meets the requirement of moisture is discharged out of the machine and is lifted to a pure paddy hucho storage bin. The rice with the water content meeting the requirement is hulled by a rice huller, a rice husk mixture separated by a rice husk separator enters a rice husk separation process, a rice husk grain extractor is arranged in a rice husk wind net and used for separating grains mixed into rice husks, green and white pieces and broken rice. In order to reduce the damage to the brown rice as much as possible and ensure the quality of the brown rice product, the hulling rate is controlled to be about 80% in the production operation. In order to minimize the entrainment of grains by the rice hull air grid, the grain mixture is allowed to contain a small amount of rice hulls during the specific production operation. In order to reduce the increase of breakage in the husking process, the brown rice factory which processes the rice more than 300t daily can adopt 1 ridge rice machine to process by returning the ridge rice alone. Separating the grain and brown mixture by a gravity grain and brown separator, ensuring the quality index of the returned grains, removing the brown, broken and the like of the separated brown rice by a thickness classifier, and preparing the brown rice product meeting the standard. In order to reduce the damage to the brown rice as much as possible and ensure the quality of the brown rice product, the content of brown rice in the recovered rice is controlled to be below 8 percent in the production operation. In order to ensure the effect of separating the grains, an air suction separator or an air suction channel can be arranged before the grain and brown mixture enters the first grain and brown separation equipment so as to further suck and remove the residual rice hulls and improve the fluidity and separability of the grain and brown mixture. Processing the obtained brown rice to obtain polished rice; carrying out ultrasonic washing on the obtained polished rice to obtain primary processed rice; soaking the obtained primary processed rice in the solution after soaking tea to obtain rice with low arsenic content.
Example 3
Firstly, rice enters a production line from a grain discharging pit, coarse impurities are removed through a primary cleaning process, large impurities, medium impurities, small impurities and light impurities are removed through a screening process, impurities such as masonry and the like are removed through a stone removing process, and the rice is lifted to a clean rice temporary storage bin after magnetic metal impurities are removed through a magnetic separation process. If the paddy needs to be dried, the paddy in the rough paddy temporary storage bin is lifted to enter a drying procedure, and after drying, tempering and cooling for a certain time, the paddy which meets the requirement of moisture is discharged out of the machine and is lifted to a pure paddy hucho storage bin. The rice with the water content meeting the requirement is hulled by a rice huller, a rice husk mixture separated by a rice husk separator enters a rice husk separation process, a rice husk grain extractor is arranged in a rice husk wind net and used for separating grains mixed into rice husks, green and white pieces and broken rice. In order to reduce the damage to the brown rice as much as possible and ensure the quality of the brown rice product, the hulling rate is controlled to be about 80% in the production operation. In order to minimize the entrainment of grains by the rice hull air grid, the grain mixture is allowed to contain a small amount of rice hulls during the specific production operation. In order to reduce the increase of breakage in the husking process, the brown rice factory which processes the rice more than 300t daily can adopt 1 ridge rice machine to process by returning the ridge rice alone. The rough rice separation can also be carried out by combining a rough rice separation horizontal rotating sieve and a gravity rough rice separator. The uppermost layer of the sieve surface of the grain-coarse separation rotary sieve is used for controlling the indexes of returning grains, and the lowermost layer of the sieve surface is used for sieving out coarse particles and has the functions of grain-coarse separation and brown rice selection. The mixture enters a gravity grain and rough separator to separate qualified clean rough, and the mixture returns to a grain and rough separation horizontal rotating sieve and the machine respectively. Separating the grain and brown mixture by a gravity grain and brown separator, ensuring the quality index of the returned grains, removing the brown, broken and the like of the separated brown rice by a thickness classifier, and preparing the brown rice product meeting the standard. In order to reduce the damage to the brown rice as much as possible and ensure the quality of the brown rice product, the content of brown rice in the recovered rice is controlled to be below 8 percent in the production operation. In order to ensure the effect of separating the grains, an air suction separator or an air suction channel can be arranged before the grain and brown mixture enters the first grain and brown separation equipment so as to further suck and remove the residual rice hulls and improve the fluidity and separability of the grain and brown mixture. . Obtaining the brown rice. Processing the obtained brown rice to obtain polished rice; carrying out ultrasonic washing on the obtained polished rice to obtain primary processed rice; soaking the obtained primary processed rice in the solution after soaking tea to obtain rice with low arsenic content.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. A preparation method of rice with low arsenic content is characterized by comprising the following steps:
removing hulls, and processing the harvested rice to obtain brown rice;
rice milling: processing the obtained brown rice to obtain polished rice;
primary dearsenization: carrying out ultrasonic washing on the obtained polished rice to obtain primary processed rice;
and (3) removing arsenic again: soaking the obtained primary processed rice in tea polyphenols solution to obtain rice with low arsenic content.
2. The method for producing rice with a low arsenic content according to claim 1, wherein in the rice milling step, the treatment comprises the steps of:
cleaning, drying, shelling, separating brown rice and selecting brown rice.
3. The method for preparing rice with low arsenic content as claimed in claim 2, wherein the cleaning step comprises the steps of feeding the rice from a grain discharging pit into a production line, removing coarse impurities through a primary cleaning process, removing large impurities, medium impurities, small impurities and light impurities through a screening process, removing impurities such as masonry through a stone removing process, removing magnetic metal impurities through a magnetic separation process, and then lifting the rice to a grain cleaning temporary storage bin.
4. The method for preparing rice with low arsenic content according to claim 2, wherein the drying step comprises the steps of lifting the rice in the rough rice temporary storage bin into a drying process if the rice needs to be dried, drying for a certain time, tempering, cooling, discharging the rice with required moisture, and lifting the rice to the clean rice storage bin.
5. The method for preparing rice with low arsenic content according to claim 2, wherein the step of husking comprises husking the rice with the required moisture content by a rice husking machine, separating the rice husk mixture from the husk separator into a rice husk separation process, and arranging a rice husk separator in a rice husk air net for separating grains, green and white rice flakes and coarse rice flakes mixed in the rice husk.
6. The method for preparing rice with low arsenic content according to claim 2, wherein the husking step comprises the uppermost screen surface of the grain husking separation rotary screen for controlling the index of returning grain, and the lowermost screen surface for screening out the broken grains and simultaneously performing the functions of grain husking separation and brown rice concentration.
7. The mixture enters a gravity grain and rough separator to separate qualified clean rough, and the mixture returns to a grain and rough separation horizontal rotating sieve and the machine respectively.
8. The method for preparing rice with low arsenic content according to claim 1, wherein the tea polyphenol solution is a tea-leaf-soaked solution in the re-arsenic removal step.
9. A low-arsenic rice obtained by the production method according to any one of claims 1 to 7.
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| CN202111412236.2A CN114130450A (en) | 2021-11-25 | 2021-11-25 | Low-arsenic rice and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2238089Y (en) * | 1995-10-21 | 1996-10-23 | 刘建平 | Combined screen body for separating sifting rice husk |
| JP2000061399A (en) * | 1998-08-25 | 2000-02-29 | Yamamoto Co Ltd | Holding structure for oscillating sorting plate of rice huller |
| CN108935631A (en) * | 2018-08-09 | 2018-12-07 | 浙江省海洋水产研究所 | A kind of dearsenification of krill and fresh-keeping treating method |
| CN109123361A (en) * | 2018-08-23 | 2019-01-04 | 安徽省东博米业有限公司 | A kind of processing method reducing trace arsenic in rice kernels content |
| CN111700212A (en) * | 2020-06-11 | 2020-09-25 | 安庆常润米业股份有限公司 | Processing method for reducing arsenic content in rice |
| CN112892646A (en) * | 2019-11-19 | 2021-06-04 | 衡阳县湖穗农业有限公司 | Rice processing method |
-
2021
- 2021-11-25 CN CN202111412236.2A patent/CN114130450A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2238089Y (en) * | 1995-10-21 | 1996-10-23 | 刘建平 | Combined screen body for separating sifting rice husk |
| JP2000061399A (en) * | 1998-08-25 | 2000-02-29 | Yamamoto Co Ltd | Holding structure for oscillating sorting plate of rice huller |
| CN108935631A (en) * | 2018-08-09 | 2018-12-07 | 浙江省海洋水产研究所 | A kind of dearsenification of krill and fresh-keeping treating method |
| CN109123361A (en) * | 2018-08-23 | 2019-01-04 | 安徽省东博米业有限公司 | A kind of processing method reducing trace arsenic in rice kernels content |
| CN112892646A (en) * | 2019-11-19 | 2021-06-04 | 衡阳县湖穗农业有限公司 | Rice processing method |
| CN111700212A (en) * | 2020-06-11 | 2020-09-25 | 安庆常润米业股份有限公司 | Processing method for reducing arsenic content in rice |
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Application publication date: 20220304 |