RU2102147C1 - Method for producing graded wheat flour - Google Patents

Abstract

FIELD: producing graded wheat flour. SUBSTANCE: method involves additional milling of second tail and underflow from the last break system on two roll systems with a speed of quick-rotating rolls ranging from 5.7 to 6.0 m/s and with 1.5 relation of circumferential speeds of rolls operating in one pair. When grading flour in sifters of various groups of reduction systems, the sieves are installed differentially with cell sizes decreasing from the first reduction system to the last one. Breaking in the first break system is preferable to be carried out on the rolls with peak-to-peak positioned rifles. EFFECT: improved quality of flour. 4 cl

Description

 The invention relates to the production of varietal wheat flour for the baking industry.

 Currently, high-grade flour is produced with a total yield of 75% with three high-grade grinding and 75 78% with two-high-quality grinding. At the same time, there is a need, especially in the absence of a sufficient amount of grain sent for processing to mill enterprises, its more rational use, and an increase in the yield of flour during the processing of the same amount of grain.

A known method for the production of varietal flour from wheat grain, including the process of preparing grain for grinding by cleaning it from impurities, moistening, tearing, stage crushing on rollers, sorting the crushed products, followed by enriching the cereals on strainers with grinding and stage grinding into flour and forming varieties flour from separate streams (Rules for the organization and conduct of the technological process in mills. M. TSNIITEIMingaza, 1978, p. 20 49). This method produces flour in three-grade grinding: premium 25 35% of the first 30 40% of the second 10 - 15% and ash quality: premium not more than 0.55, the first not more than 0.75, the second not more than 1.25 , as well as the new Podolsky variety, instead of the first grade, not more than 1.0%
The grinding process is carried out on five torn, 3 4 grinding and 10 11 grinding systems. The arrangement of the riffles on all tattered systems applies a "back to back". From the last, fifth torn system, the lower runoff is fed to the eighth grinding system, worsening the grinding of final products from the last torn and grinding systems with a total yield of varietal grinding of 75 78%
The peripheral speed of rapidly rotating rolls on the last torn and grinding systems is reduced from 5.7 6.0 to 4.0 4.5 m / s. Starting from the fourth grinding system to the ninth, rolls with a smooth surface are used, there is no clear formation of similar products for their grinding. All these disadvantages make it possible to increase the total yield of flour, to increase the production of flour from the same amount of grain. The use of low grinding regimes degrades the quality of the flour.

 There is also known a method for the production of flour in mills undergoing technical re-equipment (SU, ed. St. 1688908, class. 02 C 9/94 1991).

 According to this method, the grinding process is carried out on 4 torn, 2 3 grinding, 10 11 grinding and one grinding system. The arrangement of the riffles on all tattered systems applies a "back to back". The lower gathering from the 4th torn system, the gatherings from the fourth sorting and the gatherings from scouring machines are sent to the pitching system. The peripheral speed of rapidly rotating rolls on the last grinding systems is reduced from 5.7 to 4.5 m / s. On all grinding systems, roller shafts with a smooth surface are used with a ratio of peripheral speeds of paired rolls 1.25.

Insufficient flour extraction on the first grinding systems is also noted below 35% instead of the required 45 55%
The technical result of the claimed invention is to increase the total yield of flour to 83% from 75 to 77%
To achieve the specified technical result in a method for producing varietal flour from wheat, including preparing grain for grinding by cleaning it from impurities, moistening and tearing off, stage-by-stage crushing on torn systems with grinding of the top exit from the last torn system on scouring machines, sorting of crushed products on sieves and enrichment of grains, grinding of grains, their stage-by-stage grinding of mill grinding systems and the formation of flour varieties from separate streams from screenings of grinding systems, the second and lower gatherings last ragged system additionally milled on a two roller system at a rate of rapidly rotating rolls 5,7
6.0 m / s and the ratio of the peripheral speeds of paired rolls equal to 1.5, and when forming a flour grade in the siftings of certain groups of grinding systems, the sieves are set differentially, with a decrease in the size of the holes from the first grinding system to the last.

 On the first grinding system, crushing is preferably carried out on rolls with edge-to-tip grooves.

 On the first three grinding systems, grinding is best done on roller mills with a number of flutes on the roll of 15.2 and a slope of 8% with a ratio of the peripheral speeds of the paired rolls equal to 2.5.

 And after grinding on scouring machines, the resulting product can be sorted separately on a sieve.

 The increase in the length of the roller line on torn systems due to the introduction of special descent systems in the grinding circuit allows the process to be carried out separately and more efficiently, to grind the final products of torn and grinding systems, to correctly form intermediate products for grinding, depending on their quality, to spend more valuable rationally wheat, increase the total yield of flour by 6–8%. The installation on the first torn system of rolls with "point to point" corrugations improves grain formation in the first t Reh torn systems, to promote better grinding of the final products of the torn process, the additional production of flour, and the improvement of its quality.

 The introduction of a more intensive regime of grinding grains of the first quality on the first grinding systems, the installation of rifled rolls with a number of flutes of 15.2, a slope of 8% and a ratio of peripheral speeds of paired working rolls of 2.5 allow to increase the extraction of flour on the head systems and improve grinding on the latter.

 Differential installation of flour sieves: a separate sifting of the through products of the grinded scouring machines installed after torn systems, improves the yield and quality of flour on these systems.

 The method is as follows.

 Wheat grain of milling condition is cleaned of weed, grain, mineral and metal impurities, the surface of the grain on the washing and peeling machines is cleaned of fragile and contaminated shells, then differentiated two- or three-fold moistening and smoothing are performed.

Thus prepared grain is directed to grinding, which is carried out according to the scheme, having 4 5 torn, 2 special additional torn gathering systems, 3 4 grinding and 9 10 grinding systems. On the first tattered system, you can install shafts with the location of the rifle "tip to tip". Two additional special gathering tattered systems are introduced, rolls with a number of riffles of 10, a slope of 6% and a back-to-back arrangement are used. In this case, the peripheral speed of rapidly rotating rolls is 5.7 - 6.0 m / s, and the ratio of the peripheral speeds of paired rolls is 1.5. The last two grinding systems use shafts with a rifled surface, with a number of back-to-back corrugations of 10 and a slope of 8%
On the first three grinding systems, it is preferable to install roller machines with the number of corrugations on the roll 15.2 and a slope of 8% with a ratio of the peripheral speeds of paired working rolls equal to 2.5.

 When grinding on torn systems, the lower gathering of the last torn system is directed to additional grinding on the first additional special torn gathering system, and the second gathering, as well as sorting gathering and gathering of scouring machines on the second additional special torn gathering system.

 On grinding systems it is differentiated, depending on the quality, similar products are formed, which are sent to similar grinding systems, and an additional system is added for separate sorting of the grinding from pest machines.

 The flour obtained from separate systems of the technological process is formed into the accepted varieties of flour and sent to the control sieving by separate groups of streams that differ in quality in order to improve control.

 The described method for the production of flour allows three varietal grinding with an increased total yield of flour up to 83% to improve the quality of flour.

During experimental laboratory grinding, the following flour yields were obtained: premium 38% ash 0.52% Podolsky 29.4% ash 0.90% second 15.8% ash 1.22% with a total flour yield of 83.2%
Three-grade grinding with a total yield of flour up to 83% / 6.8% more / was accepted for production inspection, development and implementation at the flour milling enterprises of the Committee on Bread Products of the Russian Federation.

 In a mill with a capacity of 300 tons of grain processing per day / 1 /, additional flour production during the processing of the same amount of grain per year is determined at 6.8 thousand tons and an additional profit of 1.4 million rubles. / at the prices established in 1990 /.

During the production verification of the proposed method at the Podolsk flour mill with a productivity of 270 tons / day (without the production of second-grade flour, as it was before), in May 1992, the following yield of flour was obtained: semolina 1.67% premium 33.30% Podolsky 47.97% with an overall yield of 82.94%
Additional flour production per year is determined in the amount of 5.3 thousand tons, and additional profit of 5.9 million rubles.

Claims (4)

 1. A method of producing varietal flour from wheat, including preparing grain for grinding by cleaning it from impurities, moistening and tearing off, stage-by-stage crushing on torn systems with grinding of the top exit from the last torn system on scouring machines, sorting of crushed products on sieves and enriching grains, grinding of grains, their gradual grinding on roller grinding systems and the formation of flour varieties from separate streams from the sieving of grinding systems, characterized in that the second and lower descents from the last torn system they are additionally milled on two roller systems at a speed of rapidly rotating rolls of 5.7 6.0 m / s and a ratio of the peripheral speeds of paired rolls of 1.5, and when forming a grade of flour in the screenings of separate groups of grinding systems, the sieves are set differentially, with a decrease in the size of the holes the first grinding system to the last.  2. The method according to p. 1, characterized in that on the first tattered system, crushing is carried out on rolls with the location of the flutes tip to tip.  3. The method according to p. 1, characterized in that on the first three grinding systems, grinding is carried out on roller machines with a number of grooves per roll 15.2 and a slope of 8% with a ratio of peripheral speeds of paired rolls 2.5.  4. The method according to any one of paragraphs. 1 to 3, characterized in that after grinding on the scouring machines, the obtained product is subjected to separate sorting on a sieve.