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      Rice production line 20T/D Complete set high quality rice mill plant

      • 【Type】:Agricultural Equipment
      • 【Shipping ports】:Qingdao, Shanghai or Tianjin Port
      • 【Delivery】:10-15 days
      • 【Payment terms】:T/T, L/C, Western Union
      • 【E-mail】:info@jianghanok.com
      1. Detailed information

      Rice production line 20T/D Complete set high quality rice mill plant

      Commercial milling systems mill the paddy in stages, and hence are called multi-stage or multi-pass rice mills. The objective of commercial rice milling is to reduce mechanical stresses and heat buildup in the grain, thereby minimizing grain breakage and producing uniformly polished grain. Compared to village-level systems, the commercial milling system is a more sophisticated system configured to maximize the process of producing well-milled, whole grains.

      The rice milling facility comes in various configurations, and the milling components vary in design and performance. “Configuration” refers to how the 

      components are sequenced. The flow diagram below shows a modern commercial mill catering to the higher end market. It has three basic stages,

      • the husking stage,

      • the whitening-polishing stage, and

      • the grading, blending, and packaging stage.

      In modern rice mills, many adjustments (e.g. rubber roll clearance, separator bed inclination, feed rates) are automated for maximum efficiency and ease of operation. The whitener-polishers are provided with gauges that sense the current load on the motor drives which gives an indication of the operating pressure on the grain. This provides a more objective means of setting milling pressures on the grain.

      Objective of commercial milling

      A commercial rice miller will have following objectives:

      • produce edible rice that appeals to the customer- i.e. rice that is sufficiently milled and free of husks, stones, and other non-grain materials

      • maximize the total milled rice recovery out of paddy minimize grain breakage

      The modern rice milling process

      Modern rice milling processes consist of:

      Stage

      Function

      Pre-cleaning

      removing all impurities and unfilled grains from the paddy

      Husking

      removing the husk from the paddy

      Husk aspiration

      separating the husk from the brown rice/unhusked paddy

      Paddy separation

      separating the unhusked paddy from the brown rice

      De-stoning

      separating small stones from the brown rice

      Whitening

      removing all or part of the branlayer and germ from the brown rice

      Polishing

      improving the appearance of milled rice by removing remaining ran particles and by polishing the exterior of the milled kernel

      Sifting

      separating small impurities or chips from the milled rice

      Length grading

      separating small and large brokens from the head rice

      Blending

      mix head rice with predetermined amount of brokens, as required by the customer

      Weighing and bagging

      preparing milled rice for transport to the customer

      Flow diagram of a modern rice mill

      The flow diagram below represents the configuration and flow in a typical modern rice mill.

      1 - paddy is dumped in the intake pit feeding the pre-cleaner
      2 - pre-cleaned paddy moves to the rubber roll husker:
      3 - mixture of brown rice and unhusked paddy moves to the separator
      4 - unhusked paddy is separated and returned to the rubber roll husker
      5 – brown rice moves to the destoner
      6 - de-stoned, brown rice moves to the 1st stage (abrasive) whitener
      7 - partially milled rice moves to the 2nd stage (friction) whitener
      8 – milled rice moves to the sifter
      9a - (for simple rice mill) ungraded, milled rice moves to bagging station
      9b – (for more sophisticated mill) milled rice moves to the polisher1
      10 - Polished rice, will move to length grader
      11 - Head rice moves to head rice bin
      12 – Brokens moves to brokens bin
      13 – Pre-selected amount of head rice and brokens move to blending station
      14 – Custom-made blend of head rice and brokens moves to bagging station
      15 – Bagged Rice moves to the market
      A – straw, chaff and empty grains are removed
      B - husk removed by the aspirator
      C – small stones, mudd balls etc. removed by de-stoner
      D - Coarse (from 1st whitener) and fine (from 2nd whitener) bran removed from the rice grainduring the whitening process
      E - Small brokens/brewer’s rice removed by the sifter

      Examples for outputs from the different stages

      Clean paddy after pre-cleaning

      Paddy grain after precleaning. Poor quality grain is evident from its darker color. These are immature kernels or half filled grains that are not removed in the precleaner. The presence of poor quality grain lowers the total milling recovery.

      Brown rice at the rubber roller husker

      Mixture of paddy grain and brown rice coming out of the rubber roll husker. With uniform size paddy, about 90% of the paddy should be husked after the first pass. This mixture goes through a paddy separator, after which the paddy is returned to the husker,and the brown rice goes to a de-stoner.

      Milled rice after polisher

      Milled rice after the 2nd stage friction polisher. Small broken grains are still evident. This product goes to a sifter to remove the small broken grains.

      Note: Most mills have several polishing stages for gentle milling. In those mills there is undermilled rice after the 1st stage friction whitener. Not all the bran layers are fully stripped. In times of rice shortage, production of undermilled rice is promoted because of the higher milling recovery. 

      Brewers rice from the sifter

      Brewer’s rice or small broken grains removed by the screen sifter.

      Xianliang Brand complete set rice milling equipment ranked first in the same industry of our country and the complete set rice milling equipment with daily output of 20~400 t white rice has won the third prize of National Science and Technology Progress; the processing technology and equipment for clean rice have won a national invention patent; the technologies of husking in stage, twice husk sucking, twice stoning, brown rice finishing, brown rice sorting and light whitening through multiple passages etc. represent the current advanced rice milling technologies and equipment in our country.

      The specialized sale team and perfect service system after sale can provide the one-stop service for users in technical consultation, process design, installation and commissioning, technical training. Wufeng has won the users acceptance and good social prestige by aborative design, consummate manufacture, careful construction and all-round management.

      20T/D Complete set rice production line

      1. Combined cleaner            TOLQ50            1 set

      2. Pneumatic paddy husker    TH6B              1 set

      3. Husk separator                                            1 set

      4. Paddy separator         MGCZ80*6             1 set

      5. Abrasive rice whitener    TWA15B             2 sets

      6. White rice plan-sifter         MJP50*2           1 set    

      7. Mist polisher                         SP20              1 set

      8 .Bucket eleavtor                                            1 set

      9 .Double elevator                                           2 sets

      10.Bran                                                             2 sets

       


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