WO2013091633A1 - Apparatus and method for transporting particulate material - Google Patents

Apparatus and method for transporting particulate material Download PDF

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Publication number
WO2013091633A1
WO2013091633A1 PCT/DK2012/050425 DK2012050425W WO2013091633A1 WO 2013091633 A1 WO2013091633 A1 WO 2013091633A1 DK 2012050425 W DK2012050425 W DK 2012050425W WO 2013091633 A1 WO2013091633 A1 WO 2013091633A1
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WO
WIPO (PCT)
Prior art keywords
supporting surface
air
air ducts
high pressure
pressure air
Prior art date
Application number
PCT/DK2012/050425
Other languages
French (fr)
Inventor
Henrik KONRADSEN
Original Assignee
Flsmidth A/S
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 Flsmidth A/S filed Critical Flsmidth A/S
Publication of WO2013091633A1 publication Critical patent/WO2013091633A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/47—Cooling ; Waste heat management

Definitions

  • the present invention relates to an apparatus for transporting particulate material, said apparatus comprising a supporting surface for supporting the material to be transported and having a feeding end and a discharging end, where the apparatus comprises a number of air ducts, which under an inclined angle relative to the supporting surface and pointing in the direction of the discharge end pass through the supporting surface from below and open into a space above the supporting surface, where at least some of the air ducts being connected to a high pressure air source for intermittently injecting high pressure air into said space.
  • the invention also relates to a method for transporting particulate material across a supporting surface as well as a cement clinker cooler incorporating an apparatus according to the invention.
  • high pressure air is meant in this context air at pressure of 1 ⁇ 2 bar or more above atmospheric pressure.
  • An apparatus of the aforementioned kind is commonly known especially for use in connection with the transportation of hot particulate material, which may otherwise cause problems in terms of wear of mechanical parts, such as in a cement clinker cooler.
  • the kinetic energy of the high pressure air is not transferred very well to the material, thus the utilization of this energy is relatively low. This is primarily due to the fact that the injected high pressure air escapes through gaps and channels between the individual material particles in the material to be transported, whereby a large part of the kinetic energy is lost.
  • a further object of the invention is to provide a cement clinker cooler incorporating an apparatus according to the invention. According to the invention this is achieved by an apparatus of the kind mentioned in the introduction, and being characterized in that at least some of the air ducts are constructed in such a way that portions of the material to be transported is allowed to fall down into each of said air ducts between injection of high pressure air through said air ducts.
  • At least some of such air ducts may in an end section thereof which opens into the space above the supporting surface be provided with an increased cross section area. Without limiting the configuration of said end section to any specific configuration this may simply be done by providing said end section as a truncated cone with increasing diameter upwards in the flow direction of the high pressure air.
  • At least some of the air ducts may at a predetermined distance from the supporting surface be provided with means to stop the falling material stream.
  • Such means may comprise a oneway valve located in each said air ducts.
  • these means may consist of a section of the air duct itself, which is provided horizontally or downwardly as seen in the air flow direction so that a kind of "water trap" is provided.
  • the apparatus may advantageous be provided with compaction means in connection with at least some of the air ducts.
  • compaction means may, without being limited to such solution, comprise vibration means for vibrating the corresponding air duct before injection of high pressure air.
  • the inclination of the centre line of at least some of the air ducts where it pass through the supporting surface relative to the supporting surface is within the range from 15 to 60 °, preferably within 40 to 50 °.
  • the method according to the invention for transporting particulate material across a supporting surface from a feeding end to a discharging end, where high pressure air intermittently is injected under an inclined angle relative to the supporting surface and pointing in the direction of the discharge end into the particulate material from below via a number of air ducts is characterized in that portions of the particulate material to be transported is allowed to fall down into at least some of said air ducts between injection of high pressure air.
  • the initial pressure of the high pressure air at the point where it meets the particulate material in the air duct is preferably at least 1 ⁇ 2 bar above atmospheric pressure.
  • the particulate material fallen down into at least some of the air ducts may be compacted before injection of high pressure air. This may be done by vibrating the corresponding air duct before injection of high pressure air.
  • the high pressure air is injected under an angle relative to the supporting surface which is within the range from 15 to 60 °, preferably within 40 to 50 °.
  • the apparatus according to the invention may advantageously be incorporated into a cement clinker cooler comprising a supporting surface for supporting the hot cement clinker to be transported and having a feeding end and a discharging end, where the cement clinker cooler comprises a number of air ducts, which under an inclined angle relative to the supporting surface and pointing in the direction of the discharge end pass through the supporting surface from below and open into a space above the supporting surface, where at least some of the air ducts being connected to a high pressure air source for intermittently injecting high pressure air into said space and being characterized in that at least some of the air ducts are constructed in such a way that portions of the cement clinker to be transported is allowed to fall down into each of said air ducts between injection of high pressure air through said air ducts.
  • the cement clinker cooler according to the invention may further comprise the additional features detailed above. Further, the cement clinker cooler according to the invention may comprise a number of cooling air channels for supplying cooling air from an underlying compartment and a fan into the cement clinker being supported by the supporting surface via grate plates. The air flow through at least some of the channels may be regulated by means of a flow regulator provided in said channels.
  • Fig. 1 shows a sectional side view of an apparatus according to the present invention for transporting particulate material
  • Fig. 2 shows details of the apparatus according to the invention
  • Fig. 3 shows a cement clinker cooler incorporating the apparatus according to the invention.
  • Fig. 1 an apparatus for transporting particulate material 2.
  • the apparatus comprises a supporting surface 1 for supporting the material 2 to be transported and have a feeding end 5 and a discharging end 6.
  • the apparatus further comprises a number of air ducts 7, which pass through the supporting surface 1 from below and open into a space 3 above the supporting surface 1 .
  • the air ducts 7 are provided under an inclined angle relative to the supporting surface 1 and point in the direction of the discharge end 6.
  • the apparatus comprises a number of high pressure air sources 8 for intermittently injecting high pressure air into the space 3 and thus the material 2 via the air ducts 7.
  • the air ducts 7 are constructed in such a way that portions of the material 2 to be transported is allowed to fall down into each of said air ducts 7 between injection of high pressure air through said air ducts. In this way the high pressure air will meet a plug of particulate material 2 before being injected into the space 3 above the supporting surface 1 , which plug will reduce the opportunities for the air to escape the individual material particles through gaps and channels between these.
  • an end section 9 of the air duct 7 which opens into the space 3 above the supporting surface 1 is provided with an increased cross section area. In this way it can be ensured that a sufficient amount of particulate material falls down into the respective air duct 7 between injection of high pressure air.
  • the non-limiting configuration shown in Fig. 2 is provided in the form of a truncated cone with increasing diameter upwards in the flow direction of the high pressure air.
  • the air duct 7 is provided with a downwardly extending section 7a as seen in the air flow direction, thereby providing a kind of "water trap” that ensures that the particulate material falling into the air duct stops in approximately the same distance from the supporting surface 1 between injection, thereby ensuring that approximately the same amount of particulate material falls down into the air duct 7 each time.
  • a one-way valve, not shown, located in each said air ducts 7 may be used to stop the falling particulate material.
  • the shown apparatus also comprises vibration means 10 for vibrating the corresponding air duct 7 before injection of high pressure air.
  • vibration means 10 for vibrating the corresponding air duct 7 before injection of high pressure air.
  • the inclination of the centre line 1 1 of at least some of the air ducts 7 where it passes through the supporting surface 1 relative to the supporting surface 1 is within the range from 15 to 60 °, preferably within 40 to 50 °.
  • particulate material 2 is transported across the supporting surface 1 from the feeding end 5 to the discharging end 6 by means of high pressure air, which intermittently is injected under an inclined angle relative to the supporting surface 1 and pointing in the direction of the discharge end 6 into the particulate material from below via a number of air ducts 7, where portions of the particulate material 2 to be transported is allowed to fall down into at least some of said air ducts 7 between injection of high pressure air.
  • the initial pressure of the high pressure air during injection hereof at the point where it meets the particulate material 2 in the air duct 7 is preferably at least 1 ⁇ 2 bar above atmospheric pressure.
  • the particulate material fallen down into at least some of the air 7 duct is preferably compacted by means of vibration means 10 before injection of high pressure air.
  • the high pressure air is injected under an angle relative to the supporting surface which is within the range from 15 to 60 °, preferably within 40 to 50 °.
  • Fig 3 is shown a schematic side view of a cement clinker cooler incorporating the apparatus according to the invention.
  • the shown cement clinker cooler comprises a supporting surface 1 for supporting the hot cement clinker 2 to be cooled and transported and having a feeding end 5 and a discharging end 6.
  • the hot cement clinker is introduced into the cement clinker cooler from a cement kiln 12 and falls down onto the supporting surface 1 at the feeding end 5.
  • the cement clinker cooler further comprises a number of air ducts 7, which under an inclined angle relative to the supporting surface 1 and pointing in the direction of the discharge end 6 pass through the supporting surface 6 from below and open into a space 3 above the supporting surface 1 .
  • Each air duct 7 in the shown embodiment is connected to a high pressure air source 8 for intermittently injecting high pressure air into said space 3 and thus the cement clinker resting on the supporting surface.
  • the air ducts 7 are constructed in such a way that portions of the cement clinker to be transported are allowed to fall down into said air ducts 7 between injection of high pressure air through said air ducts.
  • the end section 9 of the air ducts 7 which opens into the space 3 above the supporting surface 1 may like in the apparatus according to the invention be provided with an increased cross section area.
  • the air ducts 7 in the cement clinker cooler may be provided with a downwardly extending section 7a as seen in the air flow direction, thereby providing a kind of "water trap” and vibration means 10 for vibrating the corresponding air duct 7 before injection of high pressure air.
  • the inclination of the centre line 1 1 of the air duct 7 where it passes through the supporting surface 1 relative to the supporting surface 1 is within the range from 15 to 60 °, preferably within 40 to 50 °.
  • the cement clinker cooler according to the invention may comprise a number of cooling air channels 14 for supplying cooling air from an underlying compartment 13 and a fan 15 into the cement clinker being supported by the supporting surface 1 via grate plates 16, where the air flow through at least some of the channels 14 may be regulated by means of a flow regulator 17 provided in said channels 14.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)

Abstract

Described is an apparatus and a method for transporting particulate material (2), said apparatus comprising a supporting surface (1) for supporting the material (2) to be transported and having a feeding end (5) and a discharging end (6), where the apparatus comprises a number of air ducts (7), which under an inclined angle relative to the supporting surface (1) and pointing in the direction of the discharge end (6) pass through the supporting surface (1) from below and open into a space (3) above the supporting surface (1), where at least some of the air ducts being connected to a high pressure air source (8) for intermittently injecting high pressure air into said space (3). The apparatus and the method are peculiar in that at least some of the air ducts (7) are constructed in such a way that portions of the material (2) to be transported is allowed to fall down into each of said air ducts (7) between injection of high pressure air through said air ducts (7). It is hereby obtained that the kinetic energy of the high pressure air to a much higher degree than by the known apparatus is transferred the material to be transported.

Description

Apparatus and method for transporting particulate material
The present invention relates to an apparatus for transporting particulate material, said apparatus comprising a supporting surface for supporting the material to be transported and having a feeding end and a discharging end, where the apparatus comprises a number of air ducts, which under an inclined angle relative to the supporting surface and pointing in the direction of the discharge end pass through the supporting surface from below and open into a space above the supporting surface, where at least some of the air ducts being connected to a high pressure air source for intermittently injecting high pressure air into said space. The invention also relates to a method for transporting particulate material across a supporting surface as well as a cement clinker cooler incorporating an apparatus according to the invention. By the term "high pressure air" is meant in this context air at pressure of ½ bar or more above atmospheric pressure.
An apparatus of the aforementioned kind is commonly known especially for use in connection with the transportation of hot particulate material, which may otherwise cause problems in terms of wear of mechanical parts, such as in a cement clinker cooler. However, in practical use it has been observed that the kinetic energy of the high pressure air is not transferred very well to the material, thus the utilization of this energy is relatively low. This is primarily due to the fact that the injected high pressure air escapes through gaps and channels between the individual material particles in the material to be transported, whereby a large part of the kinetic energy is lost.
It is the object of the present invention to provide an apparatus and method for transporting particulate material by means of which the aforementioned disadvantages are eliminated or significantly reduced. A further object of the invention is to provide a cement clinker cooler incorporating an apparatus according to the invention. According to the invention this is achieved by an apparatus of the kind mentioned in the introduction, and being characterized in that at least some of the air ducts are constructed in such a way that portions of the material to be transported is allowed to fall down into each of said air ducts between injection of high pressure air through said air ducts.
It is hereby obtained that the kinetic energy of the high pressure air to a much higher degree than by the known apparatus is transferred the material to be transported, thus increasing the utilization of this energy for material transportation. This is due to the fact that the injected high pressure air in this way before being injected into the space above the supporting surface and thus the particulate material resting thereon in at least some of the air ducts will meet a plug of particulate material, which due to the limited cross section area in the air ducts reduces the opportunities for the air to escape the individual material particles through gaps and channels between these.
In order to ensure that a sufficient amount of particulate material falls down into at least some of the air ducts between injection of high pressure air at least some of such air ducts may in an end section thereof which opens into the space above the supporting surface be provided with an increased cross section area. Without limiting the configuration of said end section to any specific configuration this may simply be done by providing said end section as a truncated cone with increasing diameter upwards in the flow direction of the high pressure air.
To ensure that approximately the same amount of particulate material falls down into at least some of the air ducts between injection, at least some of the air ducts may at a predetermined distance from the supporting surface be provided with means to stop the falling material stream. Such means may comprise a oneway valve located in each said air ducts. In a simpler embodiment, these means may consist of a section of the air duct itself, which is provided horizontally or downwardly as seen in the air flow direction so that a kind of "water trap" is provided.
In order to make the plug of particulate material in at least some of the air ducts more compact before injection of high pressure air, thus making it even more difficult for the air to escape the individual material particles of the plug, the apparatus may advantageous be provided with compaction means in connection with at least some of the air ducts. Such compaction means may, without being limited to such solution, comprise vibration means for vibrating the corresponding air duct before injection of high pressure air.
The inclination of the centre line of at least some of the air ducts where it pass through the supporting surface relative to the supporting surface is within the range from 15 to 60 °, preferably within 40 to 50 °.
The method according to the invention for transporting particulate material across a supporting surface from a feeding end to a discharging end, where high pressure air intermittently is injected under an inclined angle relative to the supporting surface and pointing in the direction of the discharge end into the particulate material from below via a number of air ducts, is characterized in that portions of the particulate material to be transported is allowed to fall down into at least some of said air ducts between injection of high pressure air.
The initial pressure of the high pressure air at the point where it meets the particulate material in the air duct is preferably at least ½ bar above atmospheric pressure.
According to the invention the particulate material fallen down into at least some of the air ducts may be compacted before injection of high pressure air. This may be done by vibrating the corresponding air duct before injection of high pressure air. The high pressure air is injected under an angle relative to the supporting surface which is within the range from 15 to 60 °, preferably within 40 to 50 °.
The apparatus according to the invention may advantageously be incorporated into a cement clinker cooler comprising a supporting surface for supporting the hot cement clinker to be transported and having a feeding end and a discharging end, where the cement clinker cooler comprises a number of air ducts, which under an inclined angle relative to the supporting surface and pointing in the direction of the discharge end pass through the supporting surface from below and open into a space above the supporting surface, where at least some of the air ducts being connected to a high pressure air source for intermittently injecting high pressure air into said space and being characterized in that at least some of the air ducts are constructed in such a way that portions of the cement clinker to be transported is allowed to fall down into each of said air ducts between injection of high pressure air through said air ducts.
The cement clinker cooler according to the invention may further comprise the additional features detailed above. Further, the cement clinker cooler according to the invention may comprise a number of cooling air channels for supplying cooling air from an underlying compartment and a fan into the cement clinker being supported by the supporting surface via grate plates. The air flow through at least some of the channels may be regulated by means of a flow regulator provided in said channels.
The invention will now be explained in further details with reference to the drawing, being diagrammatical, and where Fig. 1 shows a sectional side view of an apparatus according to the present invention for transporting particulate material, Fig. 2 shows details of the apparatus according to the invention, and
Fig. 3 shows a cement clinker cooler incorporating the apparatus according to the invention.
In Fig. 1 is seen an apparatus for transporting particulate material 2. The apparatus comprises a supporting surface 1 for supporting the material 2 to be transported and have a feeding end 5 and a discharging end 6. The apparatus further comprises a number of air ducts 7, which pass through the supporting surface 1 from below and open into a space 3 above the supporting surface 1 . The air ducts 7 are provided under an inclined angle relative to the supporting surface 1 and point in the direction of the discharge end 6. Further, the apparatus comprises a number of high pressure air sources 8 for intermittently injecting high pressure air into the space 3 and thus the material 2 via the air ducts 7.
In order to obtain an increased utilization degree of the kinetic energy of the high pressure air than by the known apparatus in terms of transferring this energy to the material to be transported, it is suggest according to the present invention that at least some of the air ducts 7 are constructed in such a way that portions of the material 2 to be transported is allowed to fall down into each of said air ducts 7 between injection of high pressure air through said air ducts. In this way the high pressure air will meet a plug of particulate material 2 before being injected into the space 3 above the supporting surface 1 , which plug will reduce the opportunities for the air to escape the individual material particles through gaps and channels between these.
As seen more detailed in Fig. 2 an end section 9 of the air duct 7 which opens into the space 3 above the supporting surface 1 is provided with an increased cross section area. In this way it can be ensured that a sufficient amount of particulate material falls down into the respective air duct 7 between injection of high pressure air. The non-limiting configuration shown in Fig. 2 is provided in the form of a truncated cone with increasing diameter upwards in the flow direction of the high pressure air.
Also as seen in Fig. 2 the air duct 7 is provided with a downwardly extending section 7a as seen in the air flow direction, thereby providing a kind of "water trap" that ensures that the particulate material falling into the air duct stops in approximately the same distance from the supporting surface 1 between injection, thereby ensuring that approximately the same amount of particulate material falls down into the air duct 7 each time. In an alternative embodiment a one-way valve, not shown, located in each said air ducts 7 may be used to stop the falling particulate material.
The shown apparatus also comprises vibration means 10 for vibrating the corresponding air duct 7 before injection of high pressure air. Hereby, the plug of particulate material in each said air ducts 7 is made more compact before injection of high pressure air, thus increasing the resistance of the plug to let the high pressure air pass through.
The inclination of the centre line 1 1 of at least some of the air ducts 7 where it passes through the supporting surface 1 relative to the supporting surface 1 is within the range from 15 to 60 °, preferably within 40 to 50 °.
Thus, during operation of the apparatus according to the invention particulate material 2 is transported across the supporting surface 1 from the feeding end 5 to the discharging end 6 by means of high pressure air, which intermittently is injected under an inclined angle relative to the supporting surface 1 and pointing in the direction of the discharge end 6 into the particulate material from below via a number of air ducts 7, where portions of the particulate material 2 to be transported is allowed to fall down into at least some of said air ducts 7 between injection of high pressure air. In order to ensure that the particulate material fallen down into each of said air ducts 7 between injection of high pressure air is transferred sufficient kinetic energy to move the particulate material resting on the supporting surface in the direction of the discharging end 6 of the apparatus, the initial pressure of the high pressure air during injection hereof at the point where it meets the particulate material 2 in the air duct 7 is preferably at least ½ bar above atmospheric pressure.
The particulate material fallen down into at least some of the air 7 duct is preferably compacted by means of vibration means 10 before injection of high pressure air.
The high pressure air is injected under an angle relative to the supporting surface which is within the range from 15 to 60 °, preferably within 40 to 50 °.
In Fig 3 is shown a schematic side view of a cement clinker cooler incorporating the apparatus according to the invention. The shown cement clinker cooler comprises a supporting surface 1 for supporting the hot cement clinker 2 to be cooled and transported and having a feeding end 5 and a discharging end 6. The hot cement clinker is introduced into the cement clinker cooler from a cement kiln 12 and falls down onto the supporting surface 1 at the feeding end 5. The cement clinker cooler further comprises a number of air ducts 7, which under an inclined angle relative to the supporting surface 1 and pointing in the direction of the discharge end 6 pass through the supporting surface 6 from below and open into a space 3 above the supporting surface 1 . Each air duct 7 in the shown embodiment is connected to a high pressure air source 8 for intermittently injecting high pressure air into said space 3 and thus the cement clinker resting on the supporting surface. According to the invention the air ducts 7 are constructed in such a way that portions of the cement clinker to be transported are allowed to fall down into said air ducts 7 between injection of high pressure air through said air ducts. In the shown cement clinker cooler the end section 9 of the air ducts 7 which opens into the space 3 above the supporting surface 1 may like in the apparatus according to the invention be provided with an increased cross section area. Further, the air ducts 7 in the cement clinker cooler may be provided with a downwardly extending section 7a as seen in the air flow direction, thereby providing a kind of "water trap" and vibration means 10 for vibrating the corresponding air duct 7 before injection of high pressure air.
Also, in the shown cement clinker cooler the inclination of the centre line 1 1 of the air duct 7 where it passes through the supporting surface 1 relative to the supporting surface 1 is within the range from 15 to 60 °, preferably within 40 to 50 °.
Further, the cement clinker cooler according to the invention may comprise a number of cooling air channels 14 for supplying cooling air from an underlying compartment 13 and a fan 15 into the cement clinker being supported by the supporting surface 1 via grate plates 16, where the air flow through at least some of the channels 14 may be regulated by means of a flow regulator 17 provided in said channels 14.

Claims

Claims
1 . An apparatus for transporting particulate material (2), said apparatus comprising a supporting surface (1 ) for supporting the material (2) to be transported and having a feeding end (5) and a discharging end (6), where the apparatus comprises a number of air ducts (7), which under an inclined angle relative to the supporting surface (1 ) and pointing in the direction of the discharge end (6) pass through the supporting surface (1 ) from below and open into a space (3) above the supporting surface (1 ), where at least some of the air ducts being connected to a high pressure air source (8) for intermittently injecting high pressure air into said space (3), characterized in that at least some of the air ducts (7) are constructed in such a way that portions of the material (2) to be transported are allowed to fall down into each of said air ducts (7) between injection of high pressure air through said air ducts (7).
2. An apparatus according to claim 1 , characterized in that at least some of the air ducts (7) in an end section (9) thereof which opens into the space (3) above the supporting surface (1 ) are provided with an increased cross section area.
3. An apparatus according to claim 1 , characterized in that at least some of the air ducts (7) at a predetermined distance from the supporting surface (1 ) are provided with means to stop the falling material stream.
4. An apparatus according to claim 1 , characterized in that the apparatus is provided with compaction means (10) in connection with at least some of the air ducts (7).
5. An apparatus according to claim 1 , characterized in that the inclination of the centre line (1 1 ) of at least some of the air ducts (7) where it pass through the supporting surface (1 ) relative to the supporting surface (1 ) is within the range from 15 to 60 °, preferably within 40 to 50 °.
6. A method for transporting particulate material (2) across a supporting surface (1 ) from a feeding end (5) to a discharging end (6), where high pressure air intermittently is injected under an inclined angle relative to the supporting surface (1 ) and pointing in the direction of the discharge end (6) into the particulate material (2) from below via a number of air ducts (7), characterized in that portions of the particulate material (2) to be transported is allowed to fall down into at least some of said air ducts (7) between injection of high pressure air.
7. A method according to claim 6, characterized in that the initial pressure of the high pressure air at the point where it meets the particulate material (2) in the air duct (7) preferably is at least ½ bar above atmospheric pressure.
8. A cement clinker cooler comprising a supporting surface (1 ) for supporting the hot cement clinker (2) to be transported and having a feeding end (5) and a discharging end (6), where the cement clinker cooler comprises a number of air ducts (7), which under an inclined angle relative to the supporting surface (1 ) and pointing in the direction of the discharge end (6) pass through the supporting surface (1 ) from below and open into a space (3) above the supporting surface (1 ), where at least some of the air ducts (7) being connected to a high pressure air source (8) for intermittently injecting high pressure air into said space (3), characterized in that at least some of the air ducts (7) are constructed in such a way that portions of the cement clinker (2) to be transported is allowed to fall down into each of said air ducts (7) between injection of high pressure air through said air ducts (7).
9. A cement clinker cooler according to claim 8, characterized in that it comprises a number of cooling air channels 14 for supplying cooling air into the cement clinker (2) being supported by the supporting surface (1 ).
10. A cement clinker cooler according to claim 9, characterized in that the air flow through at least some of the channels (14) is regulated by means of a flow regulator 17 provided in said channels 14.
PCT/DK2012/050425 2011-12-21 2012-11-20 Apparatus and method for transporting particulate material WO2013091633A1 (en)

Applications Claiming Priority (2)

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DKPA201170742 2011-12-21
DKPA201170742 2011-12-21

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332592C1 (en) * 1983-09-08 1985-05-15 Karl von Dipl.-Ing. Dipl.-Wirtsch.-Ing. 3057 Neustadt Wedel Grate floor composed of rust elements for bulk goods, such as cement clinker
DE3734043A1 (en) * 1987-10-08 1989-04-20 Kloeckner Humboldt Deutz Ag RUST COOLER FOR COOLING HOT PACKAGE
EP0634619A1 (en) * 1993-07-15 1995-01-18 Klöckner-Humboldt-Deutz Aktiengesellschaft Grate plate for a grate plate cooler
DE19537904A1 (en) * 1995-06-28 1997-01-02 Krupp Polysius Ag Heat-exchanger grid plate
EP0811818A1 (en) * 1996-06-05 1997-12-10 Krupp Polysius Ag Grate plate and its fabrication process
EP1816095A1 (en) * 2006-02-07 2007-08-08 IBAU Hamburg Ingenieurgesellschaft Device for pneumatically conveying pulverulent material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332592C1 (en) * 1983-09-08 1985-05-15 Karl von Dipl.-Ing. Dipl.-Wirtsch.-Ing. 3057 Neustadt Wedel Grate floor composed of rust elements for bulk goods, such as cement clinker
DE3734043A1 (en) * 1987-10-08 1989-04-20 Kloeckner Humboldt Deutz Ag RUST COOLER FOR COOLING HOT PACKAGE
EP0634619A1 (en) * 1993-07-15 1995-01-18 Klöckner-Humboldt-Deutz Aktiengesellschaft Grate plate for a grate plate cooler
DE19537904A1 (en) * 1995-06-28 1997-01-02 Krupp Polysius Ag Heat-exchanger grid plate
EP0811818A1 (en) * 1996-06-05 1997-12-10 Krupp Polysius Ag Grate plate and its fabrication process
EP1816095A1 (en) * 2006-02-07 2007-08-08 IBAU Hamburg Ingenieurgesellschaft Device for pneumatically conveying pulverulent material

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