CN105284310A - Warehousing method for fresh-keeping of rice - Google Patents

Abstract

The invention relates to a warehousing method for fresh-keeping of rice. The warehousing method comprises following steps of: (1) constructing or reconstructing a grain depot in the shape of a cuboid, arranging sealing windows at upper potions of walls on four sides and arranging heat-preservation and thermal insulation material inside of walls, wherein the areas of the sealing windows are 10 to 25% of those of walls; (b) arranging a cooling device, a ventilating device, a temperature self-control device, a humidity self-control device into the grain depot; and (c) laying a layer of calcium oxide on the ground of the grain depot and laying a PVC thin film on calcium oxide, drying paddy or rice with moisture content less than 15% by utilizing sunlight and packaging paddy or rice to be piled on the PVC thin film, adding repellents and utilizing the PVC thin film to wrap up pockets, controlling temperature of the grain depot within the range of 10 to 15 DEG C and keeping relative humidity of the grain depot within the range of 30% to 50% for storage, decreasing oxygen-bearing content within the range of 4v% to 10v% after 20 to 30 days till ex-warehouse processing is performed. The warehousing method for fresh-keeping of rice has following beneficial effects: neither rice worms nor moulds can be produced from rice or paddy insulated by the PVC thin film; storage time of rice or paddy can be prolonged; and nutrition and mouth feel can be maintained.

Description

The storage method that a kind of rice is fresh-keeping

Technical field

The invention belongs to grain field, relate to a kind of storage method, be specifically related to the storage method that a kind of rice is fresh-keeping.

Background technology

Rice is that people eat three meals a day requisite food, carbohydrate containing about 75% in rice, protein 7% ~ 8%, fat 1.3% ~ 1.8%, and containing abundant B family vitamin etc.Carbohydrate in rice mainly starch, contained protein mainly oryzenin, next is oryzenin and globulin, the biological value of its protein and amino acid whose composition are all high than cereal crops such as wheat, barley, millet, corns, digestibility 66.8% ~ 83.1% is also one higher in grain protein.

China's rice has its advantageous superiority, and critical role is occupied in market at home and abroad.For a long time, China purchases at paddy, store and the standard of price of grading in the process of circulation mainly comprises brown rice yield, head rice rate, yellow rice kernel, impurity, moisture and color and luster and smell etc., but these indexs are not enough to the edible quality reflecting that consumer pays close attention to, within 1999, country has newly worked out high quality paddy standard GB/T1789-1999, add the indexs such as amylose content, gel consistence and protein content, and formally implemented in 2000.But compared with state, still have larger gap with Japan of rice developed country etc.Owing to lacking effective rice store method, at present China have the excellent rice of a large amount of Cooking Qualities to occur going mouldy every year, the phenomenon such as infested, ageing, cause huge loss.Therefore, in the urgent need to proposing rational rice store technological means, to keep the peculiar taste of rice, fresh quality and good taste.

Summary of the invention

The present invention seeks to the storage method providing a kind of rice fresh-keeping to overcome the deficiencies in the prior art.

For achieving the above object, the technical solution used in the present invention is: the storage method that a kind of rice is fresh-keeping, and it comprises the following steps:

A grain depot is built or is transformed into cube shaped by (), arrange hermetyic window on its wall top, four sides, and arrange heat preserving and insulating material therein, the area of hermetyic window is 10 ~ 25% of wall area;

B () installs cooling device, ventilation unit, electronic temperature controller and humidity self-control device in grain depot;

C one deck calcium oxide is laid on () ground in grain depot, PVC film is laid subsequently on calcium oxide, pile up shining with sunshine in PVC film to the paddy or the encapsulation of rice pocket of moisture content≤15%, pocket is wrapped up by PVC film after adding protective agent, control that granary temperature is 10 ~ 15 DEG C, relative moisture is 30% ~ 50% to store, after 20 ~ 30 days, grain heap is down to 4v% ~ 10v% containing oxygen, until outbound processing.

Because technique scheme is used, the present invention compared with prior art has following advantages: the storage method that rice of the present invention is fresh-keeping, by one deck calcium oxide is laid on the ground in grain depot, rice for bag and grain depot air is completely cut off by PVC film, and accurately control grain depot humidity and temperature, can guarantee like this to be completely cut off in rice or paddy by PVC film not produce cadelle and mould, and the storage time of rice or paddy can be extended, and maintain nutrition and mouthfeel.

Embodiment

To be described in detail to the preferred embodiment of the invention below:

The storage method that rice of the present invention is fresh-keeping, it comprises the following steps:

A grain depot is built or is transformed into cube shaped by (), on its wall top, four sides, the hermetyic window that can open and close is set, and heat preserving and insulating material is set in the inside of four sides wall, the area of hermetyic window be wall area 10 ~ 25% (area of hermetyic window can not be too large, too large words can cause sunlight direct irradiation in grain depot, thus cause grain storehouse temperature (especially summer is) be difficult to control;

B () installs cooling device (generally opening higher than during MW temperature in outdoor temperature), ventilation unit (generally open in autumn and winter, guarantee the humidity in grain depot), electronic temperature controller and humidity self-control device in grain depot;

C () ground in grain depot is laid one deck calcium oxide (absorb water thus control the humidity in grain depot), PVC film is laid subsequently on calcium oxide, pile up shining with sunshine in PVC film to the paddy or the encapsulation of rice pocket of moisture content≤15%, pocket is wrapped up by PVC film after adding the protective agent of 30ppm, control that granary temperature is 10 ~ 15 DEG C, relative moisture is 30% ~ 50% to store, after 20 ~ 30 days, grain heap is down to 4v% ~ 10v% containing oxygen; Start 7.5 kilowatts of centrifugal fans to January next year, make grain temperature drop to 4 ~ 10 DEG C, can also prevent grain face from affecting by temperature and cause grain face to condense; Treat temperature rise (being generally April next year or May) refrigeration machine refrigeration, keep grain temperature below 10 DEG C, so circulation is until paddy or rice outbound are processed.

The cooling device that the present invention adopts, ventilation unit, electronic temperature controller and humidity self-control device by PN junction semiconductor remote transmission to calculator monitoring the state of foodstuff system, can realize the Automated condtrol of grain depot.Certainly, can also send someone according to the rules to patrol survey, generally once a day, thus get rid of the irrealizable hazards of computer supervisory control system; Also need to carry out cycle detection to grain simultaneously: ware-house-in inspection, the inspection by sampling of 1 ~ 2 month autumn and winter once, summer round of visits be 10 ~ 20 days, carry out conventional detection, guarantee the quality of grain.

Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.

Claims (1)

1. the storage method that rice is fresh-keeping, is characterized in that, it comprises the following steps:

A grain depot is built or is transformed into cube shaped by (), arrange hermetyic window on its wall top, four sides, and arrange heat preserving and insulating material therein, the area of hermetyic window is 10 ~ 25% of wall area;

B () installs cooling device, ventilation unit, electronic temperature controller and humidity self-control device in grain depot;

C one deck calcium oxide is laid on () ground in grain depot, PVC film is laid subsequently on calcium oxide, pile up shining with sunshine in PVC film to the paddy or the encapsulation of rice pocket of moisture content≤15%, pocket is wrapped up by PVC film after adding protective agent, control that granary temperature is 10 ~ 15 DEG C, relative moisture is 30% ~ 50% to store, after 20 ~ 30 days, grain heap is down to 4v% ~ 10v% containing oxygen, until outbound processing.