WO2008132580A1 - Dryer for granular material - Google Patents

Dryer for granular material Download PDF

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Publication number
WO2008132580A1
WO2008132580A1 PCT/IB2008/001008 IB2008001008W WO2008132580A1 WO 2008132580 A1 WO2008132580 A1 WO 2008132580A1 IB 2008001008 W IB2008001008 W IB 2008001008W WO 2008132580 A1 WO2008132580 A1 WO 2008132580A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating apparatus
housing
screw
duct
tube
Prior art date
Application number
PCT/IB2008/001008
Other languages
French (fr)
Inventor
Frederick Willem Teseling
Original Assignee
Frederick Willem Teseling
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Frederick Willem Teseling filed Critical Frederick Willem Teseling
Publication of WO2008132580A1 publication Critical patent/WO2008132580A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure

Definitions

  • This invention relates to apparatus for heating particulate to materials, including, but not limited to, nuts, seeds, grains and beans.
  • One apparatus includes a conveyor belt made of a wire mesh through which hot air is passed with the granular material supported thereon. Although this apparatus is fairly effective, it suffers the disadvantage that the material is not agitated with the result that it is unevenly heated with some of the material becoming more heated than the remainder. This is particularly so for the material which first encounters the hot air.
  • a further apparatus includes an inclined, externally heated tube through which the material passes.
  • This apparatus suffers the disadvantage that the tube tends to develop hot spots which in turn results in uneven heating of the material.
  • Apparatuses working on the principle of a fluidized bed have also been proposed but suffer the disadvantage that they are difficult to operate in a continuous fashion, being more suited to batch operations.
  • "particulate material” has its widest meaning and includes any material of a particulate or granular nature.
  • heating apparatus comprising a screw conveyor located at least partially within a housing and means for circulating heated air through the housing, the screw conveyor having a screw extending within a perforated duct and operable to propel granular material along its length between an inlet and an outlet.
  • the screw conveyor to extend substantially horizontally within the housing; for the housing to be configured to cause hot air to flow through the tube in a direction substantially from the top to the bottom thereof; for the housing to have baffles for directing air flow therein; for the air to be circulated within the housing; for a fan to be provided within the housing for circulating the air; and for means for heating the air to be provided, including an electrical heating element and a gas heater.
  • the duct to be provided by a tube or channel; for the screw to be rotatable within the tube; alternatively fixed to the tube; further alternately for the screw and tube to be independently rotatable; for the screw to include an axially extending shaft; and for the tube to be formed from a wire mesh, alternatively from a sheet of material having a plurality of apertures formed therein.
  • Figurei is a part sectional perspective view of heating apparatus
  • Figure 2 is a sectional side elevation of the heating apparatus in Figurei ;
  • Figure 3 is a sectional end elevation of the heating apparatus in Figure 1 ;
  • Figure 4 is an exploded side elevation of the heating apparatus in Figure
  • Figure 5 is a part sectional perspective view of the heating apparatus in
  • Heating apparatus (1 ) is shown in Figures 1 to 4 and includes a screw conveyor (2) secured within a cylindrical housing (3) in a substantially horizontal configuration.
  • the screw conveyor (2) includes an elongate screw (5) having a centrally extending axle (7) and secured within a perforated duct (9).
  • the duct (9) is a tube and is formed from a sheet of metal, preferably stainless steel, having a plurality of perforations (10) formed therein.
  • the axle (7) is rotatably secured adjacent either end (11 , 12) by an end plate (13, 14) secured within the tube (9).
  • the end plate (13) is spaced apart a small distance from the inlet (16) end of the tube (9) whilst the end plate (14) is located at the outlet end (17) of the tube (9).
  • the screw conveyor (2) is secured within the housing (3) between the outlet (19) of a feed hopper (20), at its inlet end (16), and an end plate (22) at its outlet end (17).
  • the hopper (20) has a funnel shaped inlet (24) which extends above the housing (3) adjacent one end (26) thereof with a tubular throat (28) extending through the housing (3) and terminating in an inclined end (30) with the outlet (19) extending radially through the of the throat (28) adjacent to lowermost part of the end (30).
  • a plate (32) carrying a centrally located bearing (34) is secured over the outlet (19) and has apertures (not shown) therein to allow material to flow there through. Corresponding apertures (not shown) are formed in the end plate (13) in the screw conveyor (2).
  • the inlet end (16) of the screw conveyor locates over the plate (32) with the end of the axle (7) seated within the bearing (34).
  • the axle (7) extends through a sleeve (40) extending from the end plate (14), both of which extend through the end plate (22).
  • the sleeve (40) extends through a bearing (42) secured to the end plate (22) and has a pulley (44) secured over its free end.
  • the free end of the axle (7) extends through the end of the sleeve (40) and also has a pulley (46) secured thereto.
  • a plate (60) is secured over the end (26) of the housing (3) and carries an electrical heating element (62) which extends internally of the housing (3) adjacent the upper end thereof.
  • a fan (64) is provided by an electric motor (65) secured adjacent the lower end of the plate (60) externally of the housing (3) with its drive shaft (67) extending into the housing (3) and carrying fan blades (69) on its free end.
  • a segment shaped baffle (70) extends transversely across the lower half of the housing (3) adjacent the fan blades (69) and has an aperture (72) therein co-axial with the fan blades (69).
  • a pair of baffles (74, 76) extend radially inwardly from the housing (3) along the length of the screw conveyor (2) on opposite sides thereof. Each baffle (74, 76) includes a flange (78, 80) at the free end thereof extending in the direction of rotation of the tube (9) and shaped to provide a complementary fit thereover.
  • suitable drives (not shown) are connected to the screw (5) and tube (9) through the pulleys (46, 44) and operated to cause independent rotation of these.
  • the fan (64) is then operated to cause circulation of air through the housing as indicated by the arrows (90). Air is drawn through the aperture in the baffle (70) and blown over the heating element (62) and then through the upper part of the housing (3) whereafter it is directed by the baffles (74, 76) through the screw conveyor (2) into the lower part of the housing (3) and the cycle then repeated.
  • particulate material (95) in this embodiment, coffee beans
  • the hopper (20) where it is directed into the screw conveyor (2) and moved from the inlet side (16) to the outlet side (17) in known fashion. Whilst being transported along the length of the screw conveyor (2), the coffee beans are continually agitated, particularly due to the relative rotation of the screw (5) and sleeve (9).
  • the hot air is directed through the perforations of the sleeve (9) and coffee beans (95), it causes heating and eventually roasting of these before passing through the lower side of the sleeve (9) and is then re-circulated by the fan (64).
  • the degree of heating can be accurately controlled by providing controls on the heating element and the rotational speed of the screw conveyor (2) which determines the rate of feed through the apparatus (1 ).
  • the baffles (74, 76) are located to correspond with the approximate level of particulate material (95) within the tube (9) during operation, the level of the material typically being inclined downwardly from one side thereof as a result of the rotation of the tube (9).
  • the heating apparatus (1 ) is of relatively simple construction yet is highly effective in use.
  • the screw conveyor permits the rate of propulsion of the granular material to be accurately and positively controlled, whilst also agitating the material and so promoting even heating thereof.
  • the recirculation of heated air within the housing not only saves heating costs but also has the effect that the air tends to gain moisture from the product which in turn forms super heated stream having a high heat capacity and thus causes fast and even heating of the particulate material.
  • Circulating the air from the top of the housing through the screw conveyor to the bottom of the housing has the benefit that any material dislodged from the particulate material, such as husks, dust and small particles, falls to the bottom of the housing where it can be later collected instead of being blown upwards where it tends to agglomerate and later cause blockages in air passages:
  • the screw (105) need not be mounted on an axle and could be fixed to the sleeve (109) for rotation therewith. Further alternatively, the sleeve could be fixed in position with the screw rotatable therein.
  • the tube of the screw conveyor can have any suitable configuration and could, for example, be made from a wire mesh. Naturally, the perforations in the tube will be selected so that the particulate material will not fall therethrough and that air flow will be optimized.
  • the duct need not be tubular and could be provided by a cross- sectionally part-circular channel. This configuration has the advantage of providing less resistance to the flow of air therethrough.
  • the screw could have any suitable configuration which enables transport of material along the length thereof.
  • any suitable heating source including gas heaters, and any suitable fan or blower can be used. The latter could be located externally of the housing or at any convenient location within the housing.
  • the housing could have any suitable shape, and in particular could be shaped to avoid the use of baffles.
  • the housing could be waisted about the screw conveyor to cause air to be directed therethrough.
  • the air could also be directed from the bottom to the top of the screw conveyor, particularly to obtain a fluidised bed effect within the tube if desired. Still further, although inefficient, the heated air could be circulated once through the housing and need not be continuously circulated therein.
  • any suitable particulate material can be used, including beans, grains, maize, chips, pellets and the like, and the heating apparatus will be configured accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Drying Of Solid Materials (AREA)
  • Screw Conveyors (AREA)

Abstract

A dryer (1 ) for granular materials like nuts, seeds, grains or beans comprises a screw- conveyor (2) within a perforated duct (9). Heated air is circulated through housing (3) and passes through duct (9) to dry the granular material, which is transported from inlet (16) to outlet (17) by screw-conveyor (2). Duct (9) can be made either from a wire mesh or from sheet material having a plurality of apertures formed therein. Screw-conveyor (2) can either rotate within duct (9) or can be fixed to duct (9) or screw (2) and duct (9) rotate independently from each other.

Description

DRYER FOR GRANULAR MATERIAL
FIELD OF THE INVENTION
This invention relates to apparatus for heating particulate to materials, including, but not limited to, nuts, seeds, grains and beans.
BACKGROUND TO THE INVENTION
It is often desired to heat granular or particulate materials, particularly foodstuffs, such as shelled or unshelled nuts, maize and other grains, seeds and beans. Such heating may have a number of purposes, but typically it is used to either dry the material or to roast it. Many different processes and apparatuses exist for this purpose. One apparatus includes a conveyor belt made of a wire mesh through which hot air is passed with the granular material supported thereon. Although this apparatus is fairly effective, it suffers the disadvantage that the material is not agitated with the result that it is unevenly heated with some of the material becoming more heated than the remainder. This is particularly so for the material which first encounters the hot air.
A further apparatus includes an inclined, externally heated tube through which the material passes. This apparatus suffers the disadvantage that the tube tends to develop hot spots which in turn results in uneven heating of the material. Apparatuses working on the principle of a fluidized bed have also been proposed but suffer the disadvantage that they are difficult to operate in a continuous fashion, being more suited to batch operations. In this specification, "particulate material" has its widest meaning and includes any material of a particulate or granular nature.
OBJECT OF THE INVENTION
It is an object of this invention to provide heating apparatus which will at least partially overcome some of the abovementioned problems.
SUMMARY OF THE INVENTION
In accordance with this invention there is provided heating apparatus comprising a screw conveyor located at least partially within a housing and means for circulating heated air through the housing, the screw conveyor having a screw extending within a perforated duct and operable to propel granular material along its length between an inlet and an outlet.
Further features of the invention provide for the screw conveyor to extend substantially horizontally within the housing; for the housing to be configured to cause hot air to flow through the tube in a direction substantially from the top to the bottom thereof; for the housing to have baffles for directing air flow therein; for the air to be circulated within the housing; for a fan to be provided within the housing for circulating the air; and for means for heating the air to be provided, including an electrical heating element and a gas heater.
Still further features of the invention provide for the duct to be provided by a tube or channel; for the screw to be rotatable within the tube; alternatively fixed to the tube; further alternately for the screw and tube to be independently rotatable; for the screw to include an axially extending shaft; and for the tube to be formed from a wire mesh, alternatively from a sheet of material having a plurality of apertures formed therein. BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described, by way of example only, and with reference to the accompanying drawings in which:
Figurei is a part sectional perspective view of heating apparatus;
Figure 2 is a sectional side elevation of the heating apparatus in Figurei ;
Figure 3 is a sectional end elevation of the heating apparatus in Figure 1 ;
Figure 4 is an exploded side elevation of the heating apparatus in Figure
1 ; Figure 5 is a part sectional perspective view of the heating apparatus in
Figure 1 in use; and Figure 6 is a perspective view of a second embodiment of a heating apparatus.
DETAILED DESCRIPTION OF THE DRAWINGS
Heating apparatus (1 ) is shown in Figures 1 to 4 and includes a screw conveyor (2) secured within a cylindrical housing (3) in a substantially horizontal configuration. In this embodiment, the screw conveyor (2) includes an elongate screw (5) having a centrally extending axle (7) and secured within a perforated duct (9). In this embodiment, the duct (9) is a tube and is formed from a sheet of metal, preferably stainless steel, having a plurality of perforations (10) formed therein.
The axle (7) is rotatably secured adjacent either end (11 , 12) by an end plate (13, 14) secured within the tube (9). The end plate (13) is spaced apart a small distance from the inlet (16) end of the tube (9) whilst the end plate (14) is located at the outlet end (17) of the tube (9).
The screw conveyor (2) is secured within the housing (3) between the outlet (19) of a feed hopper (20), at its inlet end (16), and an end plate (22) at its outlet end (17). The hopper (20) has a funnel shaped inlet (24) which extends above the housing (3) adjacent one end (26) thereof with a tubular throat (28) extending through the housing (3) and terminating in an inclined end (30) with the outlet (19) extending radially through the of the throat (28) adjacent to lowermost part of the end (30). A plate (32) carrying a centrally located bearing (34) is secured over the outlet (19) and has apertures (not shown) therein to allow material to flow there through. Corresponding apertures (not shown) are formed in the end plate (13) in the screw conveyor (2). The inlet end (16) of the screw conveyor locates over the plate (32) with the end of the axle (7) seated within the bearing (34).
At the outlet end (17) the axle (7) extends through a sleeve (40) extending from the end plate (14), both of which extend through the end plate (22). The sleeve (40) extends through a bearing (42) secured to the end plate (22) and has a pulley (44) secured over its free end. The free end of the axle (7) extends through the end of the sleeve (40) and also has a pulley (46) secured thereto.
Large rectangular openings (50) are formed in the tube (9) spaced about its circumference adjacent the outlet end (17) thereof and above an opening (52) in the housing (3) forming an outlet with a tube (54) extending therefrom.
A plate (60) is secured over the end (26) of the housing (3) and carries an electrical heating element (62) which extends internally of the housing (3) adjacent the upper end thereof. A fan (64) is provided by an electric motor (65) secured adjacent the lower end of the plate (60) externally of the housing (3) with its drive shaft (67) extending into the housing (3) and carrying fan blades (69) on its free end. A segment shaped baffle (70) extends transversely across the lower half of the housing (3) adjacent the fan blades (69) and has an aperture (72) therein co-axial with the fan blades (69). A pair of baffles (74, 76) extend radially inwardly from the housing (3) along the length of the screw conveyor (2) on opposite sides thereof. Each baffle (74, 76) includes a flange (78, 80) at the free end thereof extending in the direction of rotation of the tube (9) and shaped to provide a complementary fit thereover.
Referring also to Figure 5, in use suitable drives (not shown) are connected to the screw (5) and tube (9) through the pulleys (46, 44) and operated to cause independent rotation of these. The fan (64) is then operated to cause circulation of air through the housing as indicated by the arrows (90). Air is drawn through the aperture in the baffle (70) and blown over the heating element (62) and then through the upper part of the housing (3) whereafter it is directed by the baffles (74, 76) through the screw conveyor (2) into the lower part of the housing (3) and the cycle then repeated. Once the air within the housing (3) has reached the desired temperature, for which suitable instrumentation (not shown) is provided, particulate material (95), in this embodiment, coffee beans, is then fed into the hopper (20) where it is directed into the screw conveyor (2) and moved from the inlet side (16) to the outlet side (17) in known fashion. Whilst being transported along the length of the screw conveyor (2), the coffee beans are continually agitated, particularly due to the relative rotation of the screw (5) and sleeve (9). As the hot air is directed through the perforations of the sleeve (9) and coffee beans (95), it causes heating and eventually roasting of these before passing through the lower side of the sleeve (9) and is then re-circulated by the fan (64). The degree of heating can be accurately controlled by providing controls on the heating element and the rotational speed of the screw conveyor (2) which determines the rate of feed through the apparatus (1 ).
The baffles (74, 76) are located to correspond with the approximate level of particulate material (95) within the tube (9) during operation, the level of the material typically being inclined downwardly from one side thereof as a result of the rotation of the tube (9). The heating apparatus (1 ) is of relatively simple construction yet is highly effective in use. The screw conveyor permits the rate of propulsion of the granular material to be accurately and positively controlled, whilst also agitating the material and so promoting even heating thereof. The recirculation of heated air within the housing not only saves heating costs but also has the effect that the air tends to gain moisture from the product which in turn forms super heated stream having a high heat capacity and thus causes fast and even heating of the particulate material. Circulating the air from the top of the housing through the screw conveyor to the bottom of the housing has the benefit that any material dislodged from the particulate material, such as husks, dust and small particles, falls to the bottom of the housing where it can be later collected instead of being blown upwards where it tends to agglomerate and later cause blockages in air passages:
It will be "appreciated, however, that many other embodiments of heating apparatus exist, particularly as regards the configuration thereof. Referring to Figure 6, for example, where like numerals relate to like features, the screw (105) need not be mounted on an axle and could be fixed to the sleeve (109) for rotation therewith. Further alternatively, the sleeve could be fixed in position with the screw rotatable therein. Also, the tube of the screw conveyor can have any suitable configuration and could, for example, be made from a wire mesh. Naturally, the perforations in the tube will be selected so that the particulate material will not fall therethrough and that air flow will be optimized.
Furthermore, the duct need not be tubular and could be provided by a cross- sectionally part-circular channel. This configuration has the advantage of providing less resistance to the flow of air therethrough.
Clearly, the screw could have any suitable configuration which enables transport of material along the length thereof. Furthermore, any suitable heating source, including gas heaters, and any suitable fan or blower can be used. The latter could be located externally of the housing or at any convenient location within the housing.
It will also be appreciated that the housing could have any suitable shape, and in particular could be shaped to avoid the use of baffles. For example, the housing could be waisted about the screw conveyor to cause air to be directed therethrough.
The air could also be directed from the bottom to the top of the screw conveyor, particularly to obtain a fluidised bed effect within the tube if desired. Still further, although inefficient, the heated air could be circulated once through the housing and need not be continuously circulated therein.
Clearly, any suitable particulate material can be used, including beans, grains, maize, chips, pellets and the like, and the heating apparatus will be configured accordingly.

Claims

1. Heating apparatus comprising a screw conveyor located at least partially within a housing and means for circulating heated air through the housing, the screw conveyor having a screw extending within a perforated duct and operable to propel granular material along its length between an inlet and an outlet.
2. Heating apparatus as claimed in claim 1 wherein the screw conveyor extends substantially horizontally within the housing.
3. Heating apparatus as claimed in claim 1or claim 2 wherein the housing is configured to cause hot air to flow through the tube in a direction substantially from the top to the bottom thereof.
4. Heating apparatus as claimed in claim 3 wherein the housing has baffles for directing air flow therein.
5. Heating apparatus as claimed in any one of the preceding claims wherein the air is circulated within the housing.
6. Heating apparatus as claimed in any one of the preceding claims wherein a fan is provided within the housing for circulating the air.
7. Heating apparatus as claimed in any one of the preceding claims which includes means for heating the air.
8. Heating apparatus as claimed in any one of the preceding claims wherein the screw includes an axially extending shaft.
9. Heating apparatus as claimed in any one of the preceding claims wherein the duct is formed from a wire mesh.
10. Heating apparatus as claimed in any one of claims 1 to 8 wherein the duct is formed from a sheet of material having a plurality of apertures formed therein
11. Heating apparatus as claimed in any one of the preceding claims wherein the duct is provided by a channel.
12. Heating apparatus as claimed in any one of claims 1 to 10 wherein the duct is provided by a tube.
13. Heating apparatus as claimed in claim 12 wherein the screw is rotatable within the tube.
14. Heating apparatus as claimed in claim 12 wherein the screw is fixed to the tube.
15. Heating apparatus as claimed in claim 12 wherein the screw and tube are independently rotatable.
PCT/IB2008/001008 2007-04-30 2008-04-24 Dryer for granular material WO2008132580A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ZA2007/03463 2007-04-30
ZA200703463 2007-04-30
ZA2007/04371 2007-05-29
ZA200704371 2007-05-29

Publications (1)

Publication Number Publication Date
WO2008132580A1 true WO2008132580A1 (en) 2008-11-06

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Cited By (16)

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WO2013002625A2 (en) * 2011-06-27 2013-01-03 Universite Sidi Mohamed Ben Abdellah Fluidised bed dryer having an archimedean screw
CN103028565A (en) * 2012-12-10 2013-04-10 环驰云和钢球有限公司 Steel ball cleaning and drying equipment
CN104964546A (en) * 2015-07-08 2015-10-07 凯姆德（北京）能源环境科技有限公司 Spiral-transporting averaging drying device
CN105091552A (en) * 2014-05-20 2015-11-25 天津宝骏科技发展有限公司 Unpowered drying machine reclaiming residual heat
CN106322972A (en) * 2015-06-25 2017-01-11 南通市晗泰化工有限公司 Talcum powder dryer
CN106461324A (en) * 2014-03-31 2017-02-22 派瑞泰克有限公司 Chip dryer with integrated exhaust gas treatment
CN107462059A (en) * 2017-07-27 2017-12-12 东莞市秦智工业设计有限公司 A kind of toughness solid particle drying device
RU184963U1 (en) * 2018-05-29 2018-11-15 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" DEVICE FOR GRAIN DRYING
RU184961U1 (en) * 2018-05-30 2018-11-15 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" DEVICE FOR GRAIN DRYING
RU184954U1 (en) * 2018-05-29 2018-11-15 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" DEVICE FOR GRAIN DRYING
RU184964U1 (en) * 2018-05-29 2018-11-15 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" DEVICE FOR GRAIN DRYING
RU184998U1 (en) * 2018-05-29 2018-11-16 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" DEVICE FOR GRAIN DRYING
RU186476U1 (en) * 2018-09-24 2019-01-22 Федеральное государственное автономное образовательное учреждение высшего образования "Крымский федеральный университет имени В.И. Вернадского" DEVICE FOR GRAIN DRYING
RU189863U1 (en) * 2019-03-19 2019-06-06 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" DEVICE FOR DRYING GRAIN
RU189978U1 (en) * 2019-03-19 2019-06-13 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" DEVICE FOR DRYING GRAIN
RU190021U1 (en) * 2019-03-19 2019-06-14 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный аграрный университет имени П.А. Столыпина" DEVICE FOR DRYING GRAIN

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CN103028565A (en) * 2012-12-10 2013-04-10 环驰云和钢球有限公司 Steel ball cleaning and drying equipment
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CN104964546A (en) * 2015-07-08 2015-10-07 凯姆德（北京）能源环境科技有限公司 Spiral-transporting averaging drying device
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