A kind of high-grade polished rice processing technology
One, technical field: the present invention relates to a kind of processing method of rice, particularly a kind of high-grade polished rice processing technology.
Two, background technology: rice is the grain that the most of people of China must eat every day, always its work flow is fairly simple, in the little husk rice workshop in the country, a Daepori leads to rice mill, both as hulling machine, be out rough machine and pearling machine again, the rice that this processing mode processes, its inferior quality, broken rice rate height, simultaneously, the rice milling yield of paddy is also low.In some rice processing enterprises, the processing of rice, adopt: cleaning → removal of impurities+go stone → magnetic separation → go into clean granary → rough sorting of rice huller paddy → paddy → open technological process of rough → essence stone roller → rice grading → rice storehouse → metering packing → packed finished product highed milled rice, its head rice yield and rice milling yield increase, but its rice that processes still can not improve grade, can only sell as common rice, thereby, high-grade polished rice on the domestic and international market almost is the world of ocean rice entirely.In the last few years, more domestic bigger rice processing enterprise, in order to improve the class of rice, reference has the polished rice processing technology of the Japan of world lead level, they or after essence is ground operation, increase by one polishing process, or increasing by one look after the rice grading operation selects operation, the then one modified operation of increase or the like before look selects operation that also has.After taking these measures, the quality of the rice that it processes is greatly improved.
Three, summary of the invention: technical problem to be solved by this invention provides a kind ofly can process southern and northern two kinds of paddy on a production line, can improve head rice yield in the rice processing and paddy rice milling yield and can improve processing back rice class, prolong the rice rice processing technology of storage period.
The technical solution used in the present invention is: technological process is: clear up → go into silo → electronics metering → magnetic separation → go into clean granary → rice huller paddy → go stone → clean rough storehouse → electronics metering → round rice modified → multistage suppress grind go white → rice grading → polishing → cylinder classification selected → look choosing → finished bin;
Perhaps: clear up → go into silo → electronics metering → magnetic separation → go into clean granary → rice huller paddy → go stone → clean rough storehouse → electronics metering → elongated rice modified → multistage light pressure grind go white → rice grading → polishing → cylinder classification selected → look choosing → finished bin.
In cleaning process, include first clear, the multiple cleer and peaceful stone three process that goes in second road in first road.
In rice huller paddy operation, include rice huller paddy, the rough sorting of paddy and brown rice classification four procedures.
In polishing process, include heat polishing, selected, the cool rice of cylinder classification, electronics metering and join rice and cold polishing five processes.
Select at look and to include one-level look choosing in the operation and the secondary look selects two procedures.
High-grade polished rice processing technology of the present invention, be on the basis of existing high-grade polished rice processing technology, in modified operation and multistage pearling operation, increased the parallel operation of twice separately, having formed modified, the multistage stone roller of suppressing of round rice goes modified, the multistage light pressure stone roller of white operation and elongated rice to go the parallel operation of white twice, the former is used to process North Japonica Rice, the latter is used to process southern long-grained nonglutinous rice, thereby has realized the purpose of the two grain processing of a line.Simultaneously, increase modified, cold and hot two-stage polishing and two-stage look and selected operation, make that to open in the rough operation brown rice top layer moistening, the adhesion of epidermis and internal layer is reduced, and the coefficient of friction on brown rice surface is increased, required pressure reduces when driving rough and smart stone roller like this, and rice milling yield increases thereupon, has also improved the head rice yield of opening in the rough operation simultaneously; The chaff powder on grain of rice surface had both fully been removed in the perfect adaptation of cold and hot two-stage polishing, can make pre-gelatinization of grain of rice surface starch and gelatinize again, formed the gelatinous layer of layer of smooth on its surface, strengthened it and improved oxidation resistance, prolonged its freshness date; The twice look selects operation, can guarantee the uniformity of polished rice.Therefore, use high-grade polished rice processing technology of the present invention and process rice, its head rice yield and paddy rice milling yield be all than higher, and the rice free from admixture after the processing, elegant and polished, glittering and translucent, frame delivery date is long.
Four, description of drawings
Accompanying drawing 1 is a process flow diagram of the present invention.
Five, the specific embodiment:
The present invention is further illustrated below in conjunction with embodiment:
The equipment that present embodiment adopted mainly contains elevator, the vibratory cleaning sieve, the air draught separator, the Bulk Grain electronic weighing balance, silo, the air cushion belt conveyor, stone remover, magnetic separator, clean granary, hulling machine, the rough separating sieve of paddy, the thickness grader, the brown rice stone remover, clean rough storehouse, round rice quality controling machine, elongated rice quality controling machine, modified chamber, vertical multi-stage is suppressed rice mill, vertical multi-stage is gently pressed rice mill, cold and hot polishing machine, white rice grader, cylinder bag hole refiner, color selector, finished bin, various pocket of electrons installations etc.
Add man-hour, paddy enters vibratory cleaning sieve through elevator and carries out just clearly, removes the big or middle impurity of part, and inhales by the air draught separator and to go part light assorted, carries out again clearly again through the second road vibratory cleaning sieve, and stone remover removes stone, enters silo through elevator and stores up temporarily.Silo is divided into the air cushion belt conveyor, and this machine can be regulated the granting of silo raw grain neatly, and raw grain is transported to the metering of Bulk Grain electronic weighing balance through the air cushion belt conveyor, carries magnetic separator to carry out magnetic separation again, enters clean granary behind the rejecting magnetic impurity.Clean paddy at first advances the hulling machine shelling, and the rough thing of the paddy that obtains enters the rough separating sieve of paddy to be separated, and skims Hui Longgu, extracts rough only; Clean warp faulty lift thickness grader sub-elects particle and immature kernel, after the brown rice stone remover is rejected stone shoulder to shoulder, enters clean rough storehouse.The clean brown rice that is come out by clean rough storehouse is gone into modified operation through the electronics metering is laggard.When the processing North Japonica Rice, clean brown rice after the metering of process electronics enters round rice quality controling machine (generally using the atomizing-dampening system machine) and modifier treatment is carried out in modified chamber, allow clean rough contained moisture remain on 13%~15% scope, thereafter, enter vertical multi-stage and suppress rice mill and open rough and pearling; Through the brown rice after modified, its chaff layer and embryo suction back are expanded softening, form the little gradation of moisture of outer imperial palace and outer little interior big intensity gradient, produce relative displacement between chaff layer and rice kernel structure, cortex, aleurone institutional framework intensity weakens, rice seed intensity strengthens relatively, the coefficient of friction of brown rice outer surface increases, like this, needn't just can realize out rough and pearling with very big extruding force and shearing force, significantly reduce fragmentation and crackle in the rice milling process, reduce broken rice rate, increase substantially head rice yield, make the rice surface more smooth, help improving the quality of finish of back polishing process.When processing during southern long-grained nonglutinous rice, enter elongated rice quality controling machine and modifier treatment is carried out in modified chamber through the clean brown rice after the electronics metering, and enter vertical multi-stage and gently press rice mill to open rough and pearling.After multistage pearling, enter white rice grader and carry out rice grading, isolate and crack rice.Thereafter, carry out the heat polishing while hot, by rubbing action, the floating chaff in grain of rice surface is wiped, improve the fineness on grain of rice surface, what is more important makes pre-gelatinization of grain of rice surface starch and gelatinize; Rice after overheated polishing enters cylinder bag hole refiner and carries out selectedly, and isolate once more and crack rice, and by the pocket of electrons installation packing separately of cracking rice.Rice after selected enters Liang Micang, cools off, explosion when avoiding polishing once more.Cooled rice after rice is joined in metering through electronics, enters polishing machine and carries out cold polishing, strengthens the gelatinous layer on grain of rice surface, helps preserving rice, makes the grain of rice present elegant and polished, glittering and translucent shape.Enter cylinder bag hole refiner once more through the rice after the two-stage polishing and carry out selectedly, extracts whole rice, sub-elect joint rice, and pack separately by the installation of joint rice pocket of electrons.The whole rice that extracts enters common color selector and carries out the choosing of one-level look, and after the variable color rice such as removal yellow rice kernel, entering the glass color selector carries out the choosing of secondary look, removes heterochromatic impurity such as cullet, to improve rice purity.Time rice that two-stage look despecking removes is packed separately by inferior rice packing machine.Whole rice through after the choosing of two-stage look promptly becomes high-grade polished rice, delivers to the packaging process that finished bin enters the back.Dust removal by ventilation in the present embodiment, it is main adopting airtight, is equipped with the negative pressure exhausting, the dust pelletizing system before the husk rice operation adopts the blowback deduster to handle gas; The final dusting technology that wind network system after the husk rice operation adopts the picogram dragon to combine with simple and easy sack cleaner.