CA3031109A1 - System and method for continuous particles separation - Google Patents
System and method for continuous particles separation Download PDFInfo
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- CA3031109A1 CA3031109A1 CA3031109A CA3031109A CA3031109A1 CA 3031109 A1 CA3031109 A1 CA 3031109A1 CA 3031109 A CA3031109 A CA 3031109A CA 3031109 A CA3031109 A CA 3031109A CA 3031109 A1 CA3031109 A1 CA 3031109A1
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- sieving apparatus
- sieving
- cylindrical sieve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/20—Stationary drums with moving interior agitators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/14—Details or accessories
- B07B13/16—Feed or discharge arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
- B07B1/26—Revolving drums with additional axial or radial movement of the drum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
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- Combined Means For Separation Of Solids (AREA)
Abstract
A system, apparatus, and method for continuous separation of the fine powders which particle sizes are smaller than 100 µm in diameter of pulverized plant materials comprises a hopper that allows the pulverized plant materials to be feed into the sieving apparatus; a shell with two or more chambers that makes the system close; two or more cyclone attached to the bottom openings of the shell that allow sieved products and air out of the close apparatus; a cylindrical sieve with one or more zones, a blade with a hollow tube axis and a screw feeder that facilitates sieving with aerodynamic and allow the fine powder to be feed into the system from the hopper; a motor and a reducer that drives the blade; a ultrasonic generator and a converter that connects to the cylindrical sieve and promotes the sieving process; a cover that makes the apparatus a closed system. The separation process is facilitated with compressed air and/or vacuum supplied by a compressor and/or a vacuum pump.
Description
DESCRIPTION
FIELD OF THE INVENTION
The invention relates to a system, apparatus, and method for the continuous sieving of the ultra-fine powder that particle sizes are smaller than 100 pm in diameter from pulverized plant materials to obtain fractions based on their particle sizes. In a preferred embodiment, the fine powders are milled grain powders; the fractions are enriched dietary fiber and/or enriched starches and/or proteins. The sieving process is facilitated with aerodynamic and/or ultrasonic to carry out the continuous separation of the fine powder of pulverized plant materials with micron-sized cylindrical sieves.
BACKGROUND OF THE INVENTION
Sieving is an important method in the treatment of agricultural products.
Milling and sieving are cost-effective dry processing techniques in the production of fiber-enriched products from grains, such as oat and barley. The health benefits of dietary fiber from grains, such as oat and barley, become more and more noticeable in recent years. The public recognizes the health benefit of whole grain these days. However, the starch content in the grain plays an important role in the high Glycemic Index (GI) for grain products. Sieving is an irreplaceable method to remove starch from milled grain to obtain food ingredient that is low GI and suitable for people with diabetes consumption. On the other hand, it is always a big challenge to sieve the fine particles of milled grain products since clogging tends to occur. Furthermore, most sieving techniques are not continuous, cause products contamination, air and noise pollution since most of the sieving apparatus is open to the air, and vibration is used to assist the sieving process.
A review of the prior arts reveals that various sieving, air classification techniques and system are used to obtain milled grain fractions based on their particle sizes. Typical systems are shown, for example, in the following United States of America patents:
U.S. Pat. No. 4,261,817 Edwards U.S. Pat. No. 4,268,382 Hanke U.S. Pat. No. 4,806,235 Mueller U.S. Pat. No. 4,680,107 Manola U.S. Pat. No. 5,019,242 Donelson U.S. Pat. No. 5,348,161 Mueller U.S. Pat. No. 5,645,171 Felden U.S. Pat. No. 7,424,956 Kohno U.S. Pat. No. 7,976,888 Hellweg U.S. Pat. No. 7,910,143 Kvist U.S. Pat. No. 8,061,523 Uebayashi U.S. Pat. No.10,046,366 Vasanthan In view of the prior arts, there has been a continuing need for an improved system, apparatus and process to sieve the ultra-fine powder that particles sizes are smaller than 100 pm in diameter of pulverized plant materials, such as milled agricultural products, which is continuous, clean and efficient to fractionate agricultural products to obtain fiber-enriched fraction, protein-enriched fraction and/or starch-enriched fraction from agricultural products.
SUMMARY OF THE INVENTION
The present invention addresses the problem of fractionating the ultra-fine powder that particles sizes are smaller than 100 pm in diameter from pulverized plant materials, specifically grain products. The fractionating process is facilitated with aerodynamic and/or ultrasonic in a closed system continuously. In the case of milled grain product processing, certain aspects of the invention produce fractions with increased fiber content while other aspects of the invention produce fractions with increased content of starch and/or proteins.
The system is facilitated with aerodynamic generated with the internal blade, and/or compressed air, and/or vacuum, and/or ultrasonic generated with ultrasonic generator and converter attached to the cylindrical sieve.
FIELD OF THE INVENTION
The invention relates to a system, apparatus, and method for the continuous sieving of the ultra-fine powder that particle sizes are smaller than 100 pm in diameter from pulverized plant materials to obtain fractions based on their particle sizes. In a preferred embodiment, the fine powders are milled grain powders; the fractions are enriched dietary fiber and/or enriched starches and/or proteins. The sieving process is facilitated with aerodynamic and/or ultrasonic to carry out the continuous separation of the fine powder of pulverized plant materials with micron-sized cylindrical sieves.
BACKGROUND OF THE INVENTION
Sieving is an important method in the treatment of agricultural products.
Milling and sieving are cost-effective dry processing techniques in the production of fiber-enriched products from grains, such as oat and barley. The health benefits of dietary fiber from grains, such as oat and barley, become more and more noticeable in recent years. The public recognizes the health benefit of whole grain these days. However, the starch content in the grain plays an important role in the high Glycemic Index (GI) for grain products. Sieving is an irreplaceable method to remove starch from milled grain to obtain food ingredient that is low GI and suitable for people with diabetes consumption. On the other hand, it is always a big challenge to sieve the fine particles of milled grain products since clogging tends to occur. Furthermore, most sieving techniques are not continuous, cause products contamination, air and noise pollution since most of the sieving apparatus is open to the air, and vibration is used to assist the sieving process.
A review of the prior arts reveals that various sieving, air classification techniques and system are used to obtain milled grain fractions based on their particle sizes. Typical systems are shown, for example, in the following United States of America patents:
U.S. Pat. No. 4,261,817 Edwards U.S. Pat. No. 4,268,382 Hanke U.S. Pat. No. 4,806,235 Mueller U.S. Pat. No. 4,680,107 Manola U.S. Pat. No. 5,019,242 Donelson U.S. Pat. No. 5,348,161 Mueller U.S. Pat. No. 5,645,171 Felden U.S. Pat. No. 7,424,956 Kohno U.S. Pat. No. 7,976,888 Hellweg U.S. Pat. No. 7,910,143 Kvist U.S. Pat. No. 8,061,523 Uebayashi U.S. Pat. No.10,046,366 Vasanthan In view of the prior arts, there has been a continuing need for an improved system, apparatus and process to sieve the ultra-fine powder that particles sizes are smaller than 100 pm in diameter of pulverized plant materials, such as milled agricultural products, which is continuous, clean and efficient to fractionate agricultural products to obtain fiber-enriched fraction, protein-enriched fraction and/or starch-enriched fraction from agricultural products.
SUMMARY OF THE INVENTION
The present invention addresses the problem of fractionating the ultra-fine powder that particles sizes are smaller than 100 pm in diameter from pulverized plant materials, specifically grain products. The fractionating process is facilitated with aerodynamic and/or ultrasonic in a closed system continuously. In the case of milled grain product processing, certain aspects of the invention produce fractions with increased fiber content while other aspects of the invention produce fractions with increased content of starch and/or proteins.
The system is facilitated with aerodynamic generated with the internal blade, and/or compressed air, and/or vacuum, and/or ultrasonic generated with ultrasonic generator and converter attached to the cylindrical sieve.
- 2 -The closed system uses a vacuum and/or compressed air to fluidize the particles of fine powder that is fed into the system. The rotating blade enhances the fluidization of the particles of fine powder further. As a result, the fine powder is fully fluidized; the particles of fine powder separated from each other thoroughly and suspended in the air inside the cylindrical sieve in the closed system. Along with the air current inside the shell, the smaller sized fluidized fine particles pass through the cylindrical sieve, and larger sized fluidized particles are kept inside the cylindrical sieve and moved to the end of the cylindrical sieve and fall into the coarse fraction chamber. The sieving process is facilitated further with the ultrasonic unit that attached to the cylindrical sieve. There are cyclones attached to the bottom openings of the shell, which traps particles while letting the air out of the system.
The system uses aerodynamic, created by the rotating blade, and/or vacuum and/or high-pressure air, to fluidize the particulates of finely ground grain products to be filtered through a micron-sized cylindrical sieve, leaving behind a coarser fibrous fraction coming out from the end of the cylindrical sieve and fall into the end chamber. The sieving is also facilitated with ultrasonic in the closed system.
In other embodiments, the system uses a shell with three or more chambers and cylindrical sieve with two or more zone. Thus, three or more fractions with different particle sizes can be obtained continuously through the system.
In examples, which indicates the effectiveness of the process to fractionate the fine powder of pulverized plant materials, various agricultural products are used including barley, oat, field pea, faba bean, lentil, chickpea, mung bean as well as fine powder of milled dry leave of barley and oat. In the tests, 100 kg fine powder of each agricultural product is used. All the fine powders used in the test passed 200-mesh sieve. A 400-mesh cylindrical sieve and a two-chamber shell are used in the test. In the sieving test, the fine powders pass through 400-mesh cylindrical sieve through the system, the coarse fractions are collected, weighted and pass through the system the second time and weighted again; the fine fractions are collected, weighted and pass through the system the second time and weighted again. The results indicate that the weight losses from the second time sieving are less than 5%, for both coarse fractions and fine fractions.
The system uses aerodynamic, created by the rotating blade, and/or vacuum and/or high-pressure air, to fluidize the particulates of finely ground grain products to be filtered through a micron-sized cylindrical sieve, leaving behind a coarser fibrous fraction coming out from the end of the cylindrical sieve and fall into the end chamber. The sieving is also facilitated with ultrasonic in the closed system.
In other embodiments, the system uses a shell with three or more chambers and cylindrical sieve with two or more zone. Thus, three or more fractions with different particle sizes can be obtained continuously through the system.
In examples, which indicates the effectiveness of the process to fractionate the fine powder of pulverized plant materials, various agricultural products are used including barley, oat, field pea, faba bean, lentil, chickpea, mung bean as well as fine powder of milled dry leave of barley and oat. In the tests, 100 kg fine powder of each agricultural product is used. All the fine powders used in the test passed 200-mesh sieve. A 400-mesh cylindrical sieve and a two-chamber shell are used in the test. In the sieving test, the fine powders pass through 400-mesh cylindrical sieve through the system, the coarse fractions are collected, weighted and pass through the system the second time and weighted again; the fine fractions are collected, weighted and pass through the system the second time and weighted again. The results indicate that the weight losses from the second time sieving are less than 5%, for both coarse fractions and fine fractions.
- 3 -The application of the system in the value-added agricultural products processing, such as wheat milling and flour production, pin-milling and air-classification of pulse grains for the production of protein concentrates, fuel ethanol production from cereal, and wet-milling of grains for starch extraction, will significantly improve the sieving efficiency and reduce the processing cost.
If the milled grain product is wheat bran, the coarse fraction will be enriched in arabinoxylans and the fine fraction enriched in protein relative to the unfractionated wheat bran.
If the milled grain product is oat or barley, the coarse fraction will be enriched in beta-glucan while the fine fraction will be enriched in starch relative to the unfractionated milled oat or barley.
The system described herein may be used for the production of beta-glucan-enriched coarse fractions from milled barley and oat products.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the present invention are described with reference to the accompanying figures.
FIG. 1 shows an embodiment of a sieving apparatus 50 as part of a system 51 for fractionating a milled grain product G into a fine particulate fraction G2 and a coarse particulate fraction G1.
FIG. 2 shows an isometric view of apparatus 50 that is part of the system 51 based on the embodiment on FIG. 1.
FIG. 3 shows an isometric view of disassembled apparatus 50 based the embodiment on FIG 1, which is part of the system 51, including the ultrasonic generator 1, converter 2, the cover 3, a shell with two chamber 4, a hopper 5, a motor 6 and a reducer 6A, cyclone for coarse fraction 7, cyclone for fine fraction 8, a rack 9, a blade 10 with hollow axis and a hole section H and screw feeder S, a semi-closed cylindrical sieve 11 with two holes at one end, 0 and P, and the other end is open, a detail view of hole H section on blade 10.
FIG. 4 demonstrates the front view of apparatus 50 based on the embodiment from FIG 1.
If the milled grain product is wheat bran, the coarse fraction will be enriched in arabinoxylans and the fine fraction enriched in protein relative to the unfractionated wheat bran.
If the milled grain product is oat or barley, the coarse fraction will be enriched in beta-glucan while the fine fraction will be enriched in starch relative to the unfractionated milled oat or barley.
The system described herein may be used for the production of beta-glucan-enriched coarse fractions from milled barley and oat products.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the present invention are described with reference to the accompanying figures.
FIG. 1 shows an embodiment of a sieving apparatus 50 as part of a system 51 for fractionating a milled grain product G into a fine particulate fraction G2 and a coarse particulate fraction G1.
FIG. 2 shows an isometric view of apparatus 50 that is part of the system 51 based on the embodiment on FIG. 1.
FIG. 3 shows an isometric view of disassembled apparatus 50 based the embodiment on FIG 1, which is part of the system 51, including the ultrasonic generator 1, converter 2, the cover 3, a shell with two chamber 4, a hopper 5, a motor 6 and a reducer 6A, cyclone for coarse fraction 7, cyclone for fine fraction 8, a rack 9, a blade 10 with hollow axis and a hole section H and screw feeder S, a semi-closed cylindrical sieve 11 with two holes at one end, 0 and P, and the other end is open, a detail view of hole H section on blade 10.
FIG. 4 demonstrates the front view of apparatus 50 based on the embodiment from FIG 1.
- 4 -FIG. 5 shows the section F-F view based on FIG. 4 and a detail view of the hole section H.
FIG. 6 demonstrates the isometric view based on FIG. 5.
FIG. 7 shows the front view of an embodiment, a shell with three chambers along with a cylindrical sieve with two zones; a semi-closed cylindrical sieve with two holes at one end, 0 and P.
FIG. 8 shows the section B-B view based on FIG. 7.
FIG. 9 shows the isometric view based on FIG. 8.
DETAILED DESCRIPTION OF THE INVENTION
An example embodiment of the system 51 for fractionating milled grain will be described with reference to the drawing FIG. 1. An example embodiment of the sieving apparatus 50 is described with reference to the drawings FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG.5, and FIG.
6. The sieving apparatus 50 may be fabricated with stainless steel or other similar materials known to those skilled in the art. The sieving apparatus 50 includes a shell 4, a hopper 5, a motor 6 and a reducer 6A that drive the internal blade10, the blade 10 with a hole section H at the end of crew section S, a semi-closed cylindrical sieve 11, an ultrasonic generator 1, a converter 2, a cover 3, a cyclone for the coarse fraction chamber 7 and a cyclone for the fine fraction chamber 8, and a rack 9.
One embodiment of a system 51 along with a sieving apparatus 50 that fractions milled grain powder G is described with reference to FIG. 1. In the embodiment that milled grain powder G is fractionated into a coarse fraction G1 and a fine fraction G2, the system 51 comprises of a sieving apparatus 50, a compressed air storage tank 32 with a pressure regulator 33, a compressor 31, a vacuum pump 38, and pressure gauges 42 and 49, a sink 37, along with valves 34, 35, 36, 39, 40, 41, 43, 44, 45, 46, 47, 48. The milled grain powder G is feed into the sieving apparatus 50 through hopper 5 with the screw S on the blade 10 and fluidized with the compressed air from the hole section H on the blade 10.
The fluidization is further intensified with the rotating blade 10. The particles of milled grain powder are fully fluidized and floating with the air inside the semi-closed cylindrical sieve 11. Fine particles pass through the sieve with the air current and fall into cyclone 8. The coarse fractions will remain inside the cylindrical sieve and will move to the end of the
FIG. 6 demonstrates the isometric view based on FIG. 5.
FIG. 7 shows the front view of an embodiment, a shell with three chambers along with a cylindrical sieve with two zones; a semi-closed cylindrical sieve with two holes at one end, 0 and P.
FIG. 8 shows the section B-B view based on FIG. 7.
FIG. 9 shows the isometric view based on FIG. 8.
DETAILED DESCRIPTION OF THE INVENTION
An example embodiment of the system 51 for fractionating milled grain will be described with reference to the drawing FIG. 1. An example embodiment of the sieving apparatus 50 is described with reference to the drawings FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG.5, and FIG.
6. The sieving apparatus 50 may be fabricated with stainless steel or other similar materials known to those skilled in the art. The sieving apparatus 50 includes a shell 4, a hopper 5, a motor 6 and a reducer 6A that drive the internal blade10, the blade 10 with a hole section H at the end of crew section S, a semi-closed cylindrical sieve 11, an ultrasonic generator 1, a converter 2, a cover 3, a cyclone for the coarse fraction chamber 7 and a cyclone for the fine fraction chamber 8, and a rack 9.
One embodiment of a system 51 along with a sieving apparatus 50 that fractions milled grain powder G is described with reference to FIG. 1. In the embodiment that milled grain powder G is fractionated into a coarse fraction G1 and a fine fraction G2, the system 51 comprises of a sieving apparatus 50, a compressed air storage tank 32 with a pressure regulator 33, a compressor 31, a vacuum pump 38, and pressure gauges 42 and 49, a sink 37, along with valves 34, 35, 36, 39, 40, 41, 43, 44, 45, 46, 47, 48. The milled grain powder G is feed into the sieving apparatus 50 through hopper 5 with the screw S on the blade 10 and fluidized with the compressed air from the hole section H on the blade 10.
The fluidization is further intensified with the rotating blade 10. The particles of milled grain powder are fully fluidized and floating with the air inside the semi-closed cylindrical sieve 11. Fine particles pass through the sieve with the air current and fall into cyclone 8. The coarse fractions will remain inside the cylindrical sieve and will move to the end of the
- 5 -cylindrical sieve 11 and fall into cyclone 7 through hole P at the bottom. The sieving process is facilitated with ultrasonic generated by the ultrasonic generator 1 and converter 2 that attached to the cylindrical sieve. In some embodiments, typical opening sizes for the cylindrical sieve are smaller than 200 mesh (74 pm).
In one embodiment of a system 51, a compressor 31 is used to send the compressed air into the storage tank 32 through valve 35 while valve 36 is closed. Valve 36 is used to discharge water and/or other contaminants into sink 37. High-pressure air inside the storage tank 32 will pass through the pressure regulator 33, valve 34 into the hollow axis of the blade 10 through point A, to fluidize the fine powder of milled grain feed into the sieving apparatus 50. Then the air will come out of the sieving apparatus 50 through cyclone 8 and/or cyclone 7. The coarse fraction of milled grain product comes out from the bottom of cyclone 7, and the fine fraction of milled grain product comes out from the bottom of cyclone 8 continuously.
In one embodiment, a vacuum pump 38 is also used to facilitate the air current movement inside the sieving apparatus 50. In this embodiment, both compressor 31 with the compressed air storage tank 32 and vacuum pump 38 are used. While in another embodiment, the system 51 does not include a vacuum pump, the pressure gauge 49 and the valves 39, 40, 41, 46, 47 and 48.
Alternative embodiments employing a shell 4 with three chambers and a cylindrical sieve 11 with 2 zones, which enable the system to obtain three fractions based on their particle sizes continuously, is described with reference to the drawing FIG. 7, FIG. 8 and FIG. 9.
The shell comprised of two fine fraction chambers, 21 and 22, plus a coarse fraction chamber 23. The cylindrical sieve 11 with 2 zones, 24 and 25, which the opening of the sieve is different. The opening for zone 24 is smaller than that for zone 25.
One end of the semi-closed cylindrical sieve comprises two openings, 0 is for the blade 10 and P is for the coarse fraction at the bottom of the cylindrical sieve. Thus, the embodiments of system 51 that employing a sieving apparatus 50 with three chambers and a cylindrical sieve with 2 zones will yield three fractions with different particle sizes.
In one embodiment of a system 51, a compressor 31 is used to send the compressed air into the storage tank 32 through valve 35 while valve 36 is closed. Valve 36 is used to discharge water and/or other contaminants into sink 37. High-pressure air inside the storage tank 32 will pass through the pressure regulator 33, valve 34 into the hollow axis of the blade 10 through point A, to fluidize the fine powder of milled grain feed into the sieving apparatus 50. Then the air will come out of the sieving apparatus 50 through cyclone 8 and/or cyclone 7. The coarse fraction of milled grain product comes out from the bottom of cyclone 7, and the fine fraction of milled grain product comes out from the bottom of cyclone 8 continuously.
In one embodiment, a vacuum pump 38 is also used to facilitate the air current movement inside the sieving apparatus 50. In this embodiment, both compressor 31 with the compressed air storage tank 32 and vacuum pump 38 are used. While in another embodiment, the system 51 does not include a vacuum pump, the pressure gauge 49 and the valves 39, 40, 41, 46, 47 and 48.
Alternative embodiments employing a shell 4 with three chambers and a cylindrical sieve 11 with 2 zones, which enable the system to obtain three fractions based on their particle sizes continuously, is described with reference to the drawing FIG. 7, FIG. 8 and FIG. 9.
The shell comprised of two fine fraction chambers, 21 and 22, plus a coarse fraction chamber 23. The cylindrical sieve 11 with 2 zones, 24 and 25, which the opening of the sieve is different. The opening for zone 24 is smaller than that for zone 25.
One end of the semi-closed cylindrical sieve comprises two openings, 0 is for the blade 10 and P is for the coarse fraction at the bottom of the cylindrical sieve. Thus, the embodiments of system 51 that employing a sieving apparatus 50 with three chambers and a cylindrical sieve with 2 zones will yield three fractions with different particle sizes.
- 6 -EXAMPLES
Example 1 Sieving Efficiency of Various Finely Milled Grain Products In an example embodiment, which indicates the effectiveness of the process to fractionate the fine powder of pulverized plant materials, various agricultural products are used as testing materials including milled barley, oat, field pea, faba bean, lentil, chickpea, mung bean as well as fine powder of pulverized dry leave of barley and oat. In the tests, 100 kg fine powder of each agricultural product is used. All the fine powders used in the tests passed 200-mesh sieve 100%. A 400-mesh one-zone cylindrical sieve and a two-chamber shell are used in this embodiment.
In the sieving tests, the pressure of compressed air is set at 0.1 MPa, the pressure of vacuum is set at 0.05MPa. The rotating speed of the blade is set 300 rpm.
Ultrasonic is also used to assist the sieving process. The powders pass through 400-mesh cylindrical sieve through the system, the coarse fractions are collected, weighted and pass through the system the second time and weighted again.
The results indicate that the weight losses for all of the collected coarse fractions from the second time sieving are less than 5%. It means that the fine particles in the coarse fraction from the first sieving operation, which should have passed through the sieve into the fine fraction chamber during the first sieving operation, are less than 5%.
The fine fractions of the first time sieving are collected weighted and pass through the system the second time and weighted again. The results indicate that all the weight losses of the collected fine fractions are less than 2%. This result indicates that the product loss is less than 2% thanks to the closed sieving system.
Example 2 Dietary Fiber Production from Grain Products In these example embodiments, the pressure of compressed air is set at 0.2 MPa using a regulator. Vacuum is not used in this example. The rotating speed of the blade is set 400 rpm. Ultrasonic is used to assist the sieving process. All the grain products are milled
Example 1 Sieving Efficiency of Various Finely Milled Grain Products In an example embodiment, which indicates the effectiveness of the process to fractionate the fine powder of pulverized plant materials, various agricultural products are used as testing materials including milled barley, oat, field pea, faba bean, lentil, chickpea, mung bean as well as fine powder of pulverized dry leave of barley and oat. In the tests, 100 kg fine powder of each agricultural product is used. All the fine powders used in the tests passed 200-mesh sieve 100%. A 400-mesh one-zone cylindrical sieve and a two-chamber shell are used in this embodiment.
In the sieving tests, the pressure of compressed air is set at 0.1 MPa, the pressure of vacuum is set at 0.05MPa. The rotating speed of the blade is set 300 rpm.
Ultrasonic is also used to assist the sieving process. The powders pass through 400-mesh cylindrical sieve through the system, the coarse fractions are collected, weighted and pass through the system the second time and weighted again.
The results indicate that the weight losses for all of the collected coarse fractions from the second time sieving are less than 5%. It means that the fine particles in the coarse fraction from the first sieving operation, which should have passed through the sieve into the fine fraction chamber during the first sieving operation, are less than 5%.
The fine fractions of the first time sieving are collected weighted and pass through the system the second time and weighted again. The results indicate that all the weight losses of the collected fine fractions are less than 2%. This result indicates that the product loss is less than 2% thanks to the closed sieving system.
Example 2 Dietary Fiber Production from Grain Products In these example embodiments, the pressure of compressed air is set at 0.2 MPa using a regulator. Vacuum is not used in this example. The rotating speed of the blade is set 400 rpm. Ultrasonic is used to assist the sieving process. All the grain products are milled
- 7 -further to pass through 200-mesh sieve 100%. A 400-mesh one-zone cylindrical sieve and a two-chamber shell are used.
In the embodiment to sieve milled canola meal (13% dietary fiber and 37%
protein), the coarse fraction is enriched with dietary fiber (64%), and the fine fraction is enriched in protein content (51%).
In the embodiment to sieve milled pulse flours, the coarse fraction is enriched with dietary fiber (32%), the fine fraction is enriched in starch (60%).
In the embodiment to sieve milled barley flours, the coarse fraction is enriched in beta-glucan (38%); the fine fraction is enriched in starch (76%) and protein (20%).
In the embodiment to sieve milled oat flours, the coarse fraction is enriched in beta-glucan (31%); the fine fraction is enriched in starch (71%) and protein (18%).
Concluding Statements Although the invention has been described and illustrated to preferred embodiments and preferred uses, it is not to be so limited since modifications and changes can be made therein which are within the full, intended scope of the invention as understood by those skilled in the art.
In the embodiment to sieve milled canola meal (13% dietary fiber and 37%
protein), the coarse fraction is enriched with dietary fiber (64%), and the fine fraction is enriched in protein content (51%).
In the embodiment to sieve milled pulse flours, the coarse fraction is enriched with dietary fiber (32%), the fine fraction is enriched in starch (60%).
In the embodiment to sieve milled barley flours, the coarse fraction is enriched in beta-glucan (38%); the fine fraction is enriched in starch (76%) and protein (20%).
In the embodiment to sieve milled oat flours, the coarse fraction is enriched in beta-glucan (31%); the fine fraction is enriched in starch (71%) and protein (18%).
Concluding Statements Although the invention has been described and illustrated to preferred embodiments and preferred uses, it is not to be so limited since modifications and changes can be made therein which are within the full, intended scope of the invention as understood by those skilled in the art.
- 8 -
Claims
Claims The invention claimed is:
1. A sieving apparatus for the separation of milled agricultural products, the sieving apparatus comprising:
a) a shell with two or more chambers and a cylindrical sieve with one or more zones inside the shell. A cyclone attaches on the bottom of each chamber of the shell that traps the solid particles coming into the cyclone while letting the air out freely;
b) a cover makes the apparatus a closed system;
c) a blade with hollow tube axis that allows the compressed air goes into the apparatus; a portion of the axis is screw feeder that allows the powder coming into the apparatus from a hopper; a hole section at the end of screw section where the compressed air comes out of the holes to blow the incoming powder into the air inside the cylindrical sieve;
d) a motor and a reducer that drive the blade rotates at high speed to fluidize the fine powder inside the cylindrical sieve;
e) an ultrasonic generator and a converter attached to the cylindrical sieve to facilitate the sieving process;
f) a hopper that holds the fine powder that is going to be fed into the apparatus;
g) a rack that supports the apparatus.
2. The sieving apparatus of claim 1, wherein the openings of each chamber on the shell are on the bottoms that allow fractionated particles fall through with gravity into the attached cyclones;
3. The sieving apparatus of claim 2, further comprising additional openings and the corresponding covers on the sides or top of the shell to support installation and maintenance;
4. The sieving apparatus of claim 1, wherein the connection point that transmit ultrasonic from the generator and converter may be anywhere of the cylindrical sieve, directly or indirectly;
5. The sieving apparatus of claim 1, wherein a reducer is used to transmit the power from the motor to the blade and adjust rotating speed;
6. The sieving apparatus of claim 1, wherein the cylindrical sieve has one or more zones, the opening of the sieve of each zone may be different;
7. The sieving apparatus of claim 6, wherein the diameter of the cylindrical sieve is smaller than the diameter of the shell of claim 2 but larger than that of the blade of claim 12;
8. The sieving apparatus of claim 6, wherein the material of the sieve is metal such as stainless steel or plastic such as nylon;
9. The sieving apparatus of claim 6, wherein the sieve is removable and supported on a cylindrical skeleton;
10. The sieving apparatus of claim 6, wherein the cylindrical sieve is semi-closed at one end with two openings and another end is open;
11. The sieving apparatus of claim 6, wherein the semi-closed end of cylindrical sieve comprises two openings, one is in the middle for the blade of claim 12, and another is at the bottom for the coarse fraction that falls through and into the coarse fraction cyclone;
12. The sieving apparatus of claim 1, wherein the axis of the blade is horizontal and parallel with the axis of the cylindrical sieve of claim 6;
13. The sieving apparatus of claim 12, wherein the diameter of the blade is smaller than the diameter of the cylindrical sieve of claim 6;
14. The sieving apparatus of claim 12, wherein the blade is removable;
15. The sieving apparatus of claim 12, wherein the blade is designed to drive the air current inside the cylindrical sieve of claim 6 both tangentially and along the axis;
16. The sieving apparatus of claim 12, wherein the hole section is at the end of screw section;
17. The sieving apparatus of claim 12, wherein the hole section comprises two or more holes that allow the compressed air coming out of;
18. The sieving apparatus of claim 1, wherein the sieving apparatus is mounted on a rack;
19. A system for fractionating milled plant material, the system comprising:
a. a sieving apparatus as defined in claim 1; b. a vacuum pump to draw air from the side of the cyclones as defined in claim 1; c. a vacuum/pressure gauge and the associated valves that measure and control the negative pressure that draws air from the cyclones; d.
a compressor and compressed air storage tank; d. a regulator to control the discharging pressure of compressed air that goes into the sieving apparatus defined in claim 1; e. a pressure gauge and the associated valves that measure the pressure of compressed air that goes in the sieving apparatus defined in claim 1;
20. A system for fractionating milled plant material, the system comprising:
a. a sieving apparatus as defined in claim 1; b. a vacuum pump to draw air from the side of the cyclones as defined in claim 1; c. a vacuum/pressure gauge and the associated valves that measure and control the negative pressure that draws air from the cyclones;
21. A system for fractionating milled plant material, the system comprises: a.
a sieving apparatus as defined in claim 1; b. a compressor and compressed air storage tank; c. a regulator to control the discharging pressure of compressed air that goes into the sieving apparatus defined in claim 1; d. a pressure gauge and the associated valves that measure the pressure of compressed air that goes in the sieving apparatus defined in claim 1;
22. A system for fractionating milled plant material of claim 21, wherein the pressure of compressed air is between 0.05 MPa 0.50 MPa;
23. A system for fractionating milled plant material of claim 22, wherein the preferred pressure for compressed air is between 0.10 MPa and 0.30 MPa;
24. A system for fractionating milled plant material of claim 20, wherein the pressure of vacuum is -0.01 MPa and -0.50 MPa;
25. A system for fractionating milled plant material of claim 20, wherein the preferred pressure of vacuum is -0.05 MPa and -0.15 MPa.
1. A sieving apparatus for the separation of milled agricultural products, the sieving apparatus comprising:
a) a shell with two or more chambers and a cylindrical sieve with one or more zones inside the shell. A cyclone attaches on the bottom of each chamber of the shell that traps the solid particles coming into the cyclone while letting the air out freely;
b) a cover makes the apparatus a closed system;
c) a blade with hollow tube axis that allows the compressed air goes into the apparatus; a portion of the axis is screw feeder that allows the powder coming into the apparatus from a hopper; a hole section at the end of screw section where the compressed air comes out of the holes to blow the incoming powder into the air inside the cylindrical sieve;
d) a motor and a reducer that drive the blade rotates at high speed to fluidize the fine powder inside the cylindrical sieve;
e) an ultrasonic generator and a converter attached to the cylindrical sieve to facilitate the sieving process;
f) a hopper that holds the fine powder that is going to be fed into the apparatus;
g) a rack that supports the apparatus.
2. The sieving apparatus of claim 1, wherein the openings of each chamber on the shell are on the bottoms that allow fractionated particles fall through with gravity into the attached cyclones;
3. The sieving apparatus of claim 2, further comprising additional openings and the corresponding covers on the sides or top of the shell to support installation and maintenance;
4. The sieving apparatus of claim 1, wherein the connection point that transmit ultrasonic from the generator and converter may be anywhere of the cylindrical sieve, directly or indirectly;
5. The sieving apparatus of claim 1, wherein a reducer is used to transmit the power from the motor to the blade and adjust rotating speed;
6. The sieving apparatus of claim 1, wherein the cylindrical sieve has one or more zones, the opening of the sieve of each zone may be different;
7. The sieving apparatus of claim 6, wherein the diameter of the cylindrical sieve is smaller than the diameter of the shell of claim 2 but larger than that of the blade of claim 12;
8. The sieving apparatus of claim 6, wherein the material of the sieve is metal such as stainless steel or plastic such as nylon;
9. The sieving apparatus of claim 6, wherein the sieve is removable and supported on a cylindrical skeleton;
10. The sieving apparatus of claim 6, wherein the cylindrical sieve is semi-closed at one end with two openings and another end is open;
11. The sieving apparatus of claim 6, wherein the semi-closed end of cylindrical sieve comprises two openings, one is in the middle for the blade of claim 12, and another is at the bottom for the coarse fraction that falls through and into the coarse fraction cyclone;
12. The sieving apparatus of claim 1, wherein the axis of the blade is horizontal and parallel with the axis of the cylindrical sieve of claim 6;
13. The sieving apparatus of claim 12, wherein the diameter of the blade is smaller than the diameter of the cylindrical sieve of claim 6;
14. The sieving apparatus of claim 12, wherein the blade is removable;
15. The sieving apparatus of claim 12, wherein the blade is designed to drive the air current inside the cylindrical sieve of claim 6 both tangentially and along the axis;
16. The sieving apparatus of claim 12, wherein the hole section is at the end of screw section;
17. The sieving apparatus of claim 12, wherein the hole section comprises two or more holes that allow the compressed air coming out of;
18. The sieving apparatus of claim 1, wherein the sieving apparatus is mounted on a rack;
19. A system for fractionating milled plant material, the system comprising:
a. a sieving apparatus as defined in claim 1; b. a vacuum pump to draw air from the side of the cyclones as defined in claim 1; c. a vacuum/pressure gauge and the associated valves that measure and control the negative pressure that draws air from the cyclones; d.
a compressor and compressed air storage tank; d. a regulator to control the discharging pressure of compressed air that goes into the sieving apparatus defined in claim 1; e. a pressure gauge and the associated valves that measure the pressure of compressed air that goes in the sieving apparatus defined in claim 1;
20. A system for fractionating milled plant material, the system comprising:
a. a sieving apparatus as defined in claim 1; b. a vacuum pump to draw air from the side of the cyclones as defined in claim 1; c. a vacuum/pressure gauge and the associated valves that measure and control the negative pressure that draws air from the cyclones;
21. A system for fractionating milled plant material, the system comprises: a.
a sieving apparatus as defined in claim 1; b. a compressor and compressed air storage tank; c. a regulator to control the discharging pressure of compressed air that goes into the sieving apparatus defined in claim 1; d. a pressure gauge and the associated valves that measure the pressure of compressed air that goes in the sieving apparatus defined in claim 1;
22. A system for fractionating milled plant material of claim 21, wherein the pressure of compressed air is between 0.05 MPa 0.50 MPa;
23. A system for fractionating milled plant material of claim 22, wherein the preferred pressure for compressed air is between 0.10 MPa and 0.30 MPa;
24. A system for fractionating milled plant material of claim 20, wherein the pressure of vacuum is -0.01 MPa and -0.50 MPa;
25. A system for fractionating milled plant material of claim 20, wherein the preferred pressure of vacuum is -0.05 MPa and -0.15 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3031109A CA3031109A1 (en) | 2019-01-23 | 2019-01-23 | System and method for continuous particles separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3031109A CA3031109A1 (en) | 2019-01-23 | 2019-01-23 | System and method for continuous particles separation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3031109A1 true CA3031109A1 (en) | 2020-07-23 |
Family
ID=71729099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3031109A Abandoned CA3031109A1 (en) | 2019-01-23 | 2019-01-23 | System and method for continuous particles separation |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA3031109A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113019723A (en) * | 2021-03-29 | 2021-06-25 | 抚顺罕王傲牛矿业股份有限公司 | High-efficiency ore grinding and grading process for solving dehydration of products on high-frequency sieve |
| WO2022043609A1 (en) * | 2020-08-25 | 2022-03-03 | Ecoup Oy | Screening device, screening system and screening method |
-
2019
- 2019-01-23 CA CA3031109A patent/CA3031109A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022043609A1 (en) * | 2020-08-25 | 2022-03-03 | Ecoup Oy | Screening device, screening system and screening method |
| EP4265344A3 (en) * | 2020-08-25 | 2023-11-01 | EcoUp Oyj | Screening device, screening system and screening method |
| CN113019723A (en) * | 2021-03-29 | 2021-06-25 | 抚顺罕王傲牛矿业股份有限公司 | High-efficiency ore grinding and grading process for solving dehydration of products on high-frequency sieve |
| CN113019723B (en) * | 2021-03-29 | 2022-04-01 | 抚顺罕王傲牛矿业股份有限公司 | High-efficiency ore grinding and grading process for solving dehydration of products on high-frequency sieve |
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