EP3414196A1 - Dispositif et procédé pour transport de matériaux en poudre en phase hyper dense - Google Patents

Dispositif et procédé pour transport de matériaux en poudre en phase hyper dense

Info

Publication number
EP3414196A1
EP3414196A1 EP17704437.7A EP17704437A EP3414196A1 EP 3414196 A1 EP3414196 A1 EP 3414196A1 EP 17704437 A EP17704437 A EP 17704437A EP 3414196 A1 EP3414196 A1 EP 3414196A1
Authority
EP
European Patent Office
Prior art keywords
duct
air injection
injection device
powder material
bypass
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP17704437.7A
Other languages
German (de)
English (en)
Inventor
Geoffrey Petit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reel Alesa SAS
Original Assignee
Reel Alesa SAS
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 Reel Alesa SAS filed Critical Reel Alesa SAS
Publication of EP3414196A1 publication Critical patent/EP3414196A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/16—Gas pressure systems operating with fluidisation of the materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/52—Adaptations of pipes or tubes
    • B65G53/521—Adaptations of pipes or tubes means for preventing the accumulation or for removal of deposits

Definitions

  • the present invention relates to a bypass device for conveying a powder material, in particular in a hyperdense phase. It further relates to a system for conveying the powder material comprising the bypass device and an upstream duct and a downstream duct. It also relates to a method of conveying of a powder material to bypass an obstacle.
  • a common handling system comprises, for example, two chambers separated by a porous fluidization wall. Low pressure air is injected in the lower chamber and flows through the wall to fluidize the upper chamber where the powder is.
  • EP 1 091 898 Bl discloses a device to bypass an obstacle comprising three ducts that are inserted between two horizontal conveyors of a hyperdense bed conveyor system being adjacent to the obstacle to be bypassed.
  • the horizontal conveyors are situated at the same level as the obstacle and are connected to two of the ducts, which are vertically arranged with respect to said conveyors. Said two ducts are connected to the third duct that is not at the same level as the obstacle. Thereby, a passage above or below the obstacle to be bypassed is created.
  • a technical challenge associated with such bypass devices relates to the maintenance of the dense phase fluidized flows especially in the vertically arranged ducts. Oscillations can occur which are directly associated with fluctuations of the material flow in the bypass device and which lead to an unstable material flow. Or even a de-fluidization can emerge, which results in a blockage of the powder material especially at the bottom of the vertically arranged ducts.
  • the present invention further relates to a system for conveying a powder material, in particular in a hyperdense phase, according to claim 17.
  • the present invention further relates to a method of conveying a powder material, in particular in a hyperdense phase, to bypass an obstacle according to claim 18.
  • the invention further relates to a retention plate, preferably arranged in said bypass device, to prevent a backflow of the conveyed powder material according to claim 19.
  • the invention provides a bypass device for conveying a powder material, in particular in a hyperdense phase, comprising a first duct which is connectable to an upstream duct, an intermediate duct, and a second duct which is connectable to a downstream duct.
  • the first duct is in connection with the second duct via said intermediate duct, such that said powder material is conveyable from said first duct via said intermediate duct to said second duct.
  • the first duct extends at a first angle angularly inclined to the intermediate duct and the second duct extends at a second angle angularly inclined to the intermediate duct.
  • the bypass device further comprises at least one air injection device that is arranged in one of said first and/or said second duct for supplying gas at a determined pressure value and/or determined flow value into said first and/or second duct.
  • the gas supplied by the at least one air injection device is at a determined pressure value and/or at a determined flow value so as to influence the powder material flow in a desired manner.
  • the determined pressure value and/or the determined flow value of the gas supplied by the air injection device is preferably chosen such, that a potential perturbation on the powder material flow is minimized. The result is a stable flow rate of said powder material flow, where the risk of blockage of the powder material in the bypass device is reduced.
  • the bypass device thus permits a reliable and stable conveying of the powder material.
  • the determined flow value and the determined pressure value are physical quantities which both relate to the influence of the supplied gas on an additional fluidity of the material to be conveyed.
  • the determined flow value can be seen as the flow that is needed to fluidize the material, where a particular flow results in the generation of a particular pressure.
  • the gas supplied by said air injection device is preferably pressurized air.
  • the powder material to be conveyed preferably corresponds to aluminum oxide ⁇ 1 2 0 3> but however it is to be understood that the conveyance is not limited to the conveyance of this type of powder material.
  • At least one air injection device can be arranged in either the first duct or in the second duct. Alternatively, at least one air injection device can be arranged in the first duct as well as in the second duct. Said at least one air injection device is preferably arranged such that the gas exits substantially in a counter direction with respect to the direction of flow of the material to be conveyed.
  • the air injection device is preferably arranged such, that the gas injection is pointing upwardly within the first duct and/or the second duct, i.e. along a direction extending from the lowest point of interconnection towards the highest point of interconnection between the first duct and the intermediate duct and the second duct and the intermediate duct, respectively.
  • an injection is not preferred in the direction of flow of the material to be conveyed in the first duct and it is not preferred in a direction counter to the direction of flow of the material to be conveyed in the second duct, respectively.
  • the injection along such a direction i.e. upwardly, maintains the fluidization and enhances the so-called drag force as it is known from fluidized beds for example.
  • first duct and the second duct are arranged at an angle of about 90° with respect to the intermediate duct.
  • the first duct and the second duct extend parallel to one another and are located at a distance with respect to each other.
  • first and the second duct are arranged in a vertical way and that the intermediate duct is arranged in a horizontal way situated either above or below the first and second ducts in their installation.
  • the bypass with its ducts has in this preferred embodiment the shape of an U.
  • duct is to be understood as a structural element which is enclosed by a cylinder wall and which extends along a middle axis.
  • said ducts can have any desired cross-section, however, the ducts preferably have a circular cylindrical or a rectangular cross-section.
  • the first duct, second duct and intermediate duct can be designed and operated according to the upstream caisson, downstream caisson and intermediate caisson as disclosed in [0031] to [0055] of EP 1 091 898 Bl.
  • the ducts described herein can be seen as the caissons of EP 1 091 898 Bl, i.e.
  • Said at least one air injection device is preferably arranged in an air injection zone, wherein said air injection zone extends from the lowest point of interconnection between the intermediate duct and the respective duct up to a specific height in the respective duct.
  • said air injection zone extends from the highest point of interconnection between the intermediate duct and the respective duct up to the specific height in the respective duct.
  • the specific height is between 1/6 and 3/6, preferably about 1/3, of the total height of the first duct and of the second duct, respectively.
  • the first duct extends from the lowest region of connection to the intermediate duct over a height of 6 meter
  • said at least one air injection device is arranged in the first duct about 1 meter above said lowest region of connection to the intermediate duct.
  • the second duct extends from the lowest region of connection to the intermediate duct over a height of 6 meters, said at least one air injection device is arranged in the second duct about 1 meter above said lowest region of connection to the intermediate duct.
  • the air injection device may comprise at least one air injection opening configured to spread the gas over the complete cross-section of the first duct and/or of the second duct.
  • gas supplied by the air injection device would be spread by the air injection opening such, that the whole cylindrical cross section of the cylindrically-shaped duct is exposed to the gas. This enhances the performance of the system and in particular prevents congestion in the ducts.
  • Said at least one air injection opening is preferably arranged such that the gas exits substantially upwardly within the first duct and/or the second duct, i.e. along the direction extending from the lowest point of interconnection towards the highest point of interconnection between the first duct and the intermediate duct and the second duct and the intermediate duct, respectively.
  • bypass device further comprises in addition to said at least one air injection device at least one further air injection device that is arranged in the first and/or second duct for supplying gas at a determined further pressure value and/or at a determined further flow value into said first and/or second duct.
  • the bypass device comprises at least one air injection device and at least one further air injection device in the first duct or in the second duct, respectively.
  • the first duct second duct
  • the second duct first duct
  • both the first duct and the second duct each comprise at least one air injection device and at least one further air injection device.
  • bypass device may comprise a plurality of such air injection devices, where any information and explanation made herein may refer to all of these air injection devices. However, for the ease of understanding, reference is primary made to the at least one air injection device and/or the at least one further air injection device.
  • the air injection device and the further air injection device are arranged at a distance with respect to each other, wherein said distance is preferably between 2 to 10 times the diameter of the duct in which the air injection device is arranged or wherein said distance is between 0.5 meter to 1.5 meter, preferably about 1 meter.
  • a preferred arrangement comprises air injection devices which cover the first third of the first duct and of the second duct, i.e. the first 2 meter in the case of ducts having a height of 6 meter, where the air injection devices are spaced by a distance of 1 meter.
  • the further air injection device is preferably arranged before the air injection device in the first duct and the further air injection device is preferably arranged after the air injection device in the second duct, respectively.
  • a gas injection flow rate can be associated with the gas supplied through the air injection device and/or through the further air injection device with respect to the cross-section area of the first and of the second duct, respectively, and a minimum bubbling velocity can be associated with said gas injection flow rate per air injection device with respect to the cross-section area of the respective duct.
  • the gas injection flow rate can be between 0.5 times the minimum bubbling velocity and 5 times the minimum bubbling velocity, preferably around 3 times the minimum bubbling velocity.
  • the minimum bubbling velocity can be defined as the superficial velocity at which bubbles generated in the powder material flow first appear, and which minimum bubbling velocity can be associated with the gas injection flow rate per air injection device with respect to the cross-section area of the respective duct.
  • the minimum bubbling velocity is associated with the hydrodynamic characteristic of the powder material to handle, which, in the exemplary case of A1 2 0 3 , is around 8 millimeter per second.
  • the air injection device and/or the further air injection device are preferably formed from a porous material.
  • the porous material is a sintered metal.
  • the air injection device and/or the further air injection device is designed with a truncated-cone-shape and is arranged in the center of the first duct and/or of the second duct, respectively.
  • the air injection opening can be formed in the apex of the cone so as to spread the gas over the complete cross-section of the first duct and/or of the second duct.
  • the air injection device and/or the further air injection device preferably are a spray nozzle.
  • the air injection device and/or the further air injection device preferably have an injection device diameter being about 10 % to 30 %, preferably about 20 % smaller than the diameter of the first duct and/or the diameter of the second duct, respectively.
  • the air injection device and/or further air injection device or its diameter, respectively, is preferably as small as possible in order not to block the first duct and/or second duct while still being able to spread the gas over the complete cross-section of the respective duct.
  • the air injection devices can be designed with a truncated-cone- shape, where the air injection device surface area ("footprint") is minimized. Thereby, a drag force associated with the forces acting opposite to the powder material flow can also be minimized.
  • the air injection device and/or the further air injection device is designed as a nozzle pipe, wherein said nozzle pipe extends at least partially into said duct, or wherein said nozzle pipe extends from a side wall of the duct to the opposite side wall of said duct.
  • the nozzle pipe is preferably arranged perpendicularly with respect to the powder material flow within the first duct and/or the second duct, i.e. the nozzle pipe preferably extends partially or fully from one side wall of the duct to the opposite side wall of the same duct in a plane being parallel to the cross-section area of said duct.
  • the nozzle pipe has a diameter being smaller than the diameter of the respective duct. That is, the lateral expansion of the nozzle pipe is preferably as small as possible in order not to block the first duct and/or second duct and consequently the powder material flow, while still being able to spread the gas over the complete cross- section of the respective duct. Hence, it is desired to design the nozzle pipe such that it results in a minimal perturbation of the powder material flow.
  • the nozzle pipe comprises several nozzle openings that are formed on the nozzle pipe along the direction of extension of the nozzle pipe within the respective duct so as to spread the gas over the complete cross-section of said duct, respectively.
  • the air injection device and the further air injection device can be seen, in the direction of the powder material flow, as two porous, perforated nozzle pipes running spaced from each other and running in parallel with respect to each other across the a partial or the full width of the first duct and/or second duct.
  • the air injection device and/or the further air injection device is designed as a nozzle pipe being arranged in a side wall along a vertical direction of the first duct and/or of the second duct, respectively.
  • said nozzle pipe can extend within the side wall of the first duct and/or second duct in parallel with the direction of the powder material flow within said duct.
  • One advantage that arises from such an arrangement of the nozzle pipe arranged within the side wall of the duct is the resulting minimal perturbation of the powder material flow.
  • the nozzles of said nozzle pipe are preferably designed with a truncated-cone- shape and comprise nozzle openings formed in the apex of the cone so as to spread the gas over the complete cross-section of the respective duct.
  • the nozzle opening of the further nozzle is preferably arranged before the nozzle opening of the nozzle in the first duct and/or the nozzle opening of the further nozzle is preferably arranged after the nozzle opening of the nozzle in the second duct, respectively.
  • a plurality of nozzles and/or a plurality of further nozzles are designed as a nozzle ring, said nozzle ring extending along a circumferential direction of the first duct and/or second duct, respectively.
  • said nozzle ring can be of a circular cylindrical shape, too, and being arranged within the cylinder wall and extending in a circumferential direction along the middle axis of said duct.
  • the diameter of the first duct is preferably smaller than the diameter of the second duct, the diameter of the first duct preferably being about 60 % to 90 , more preferably about 70 % to 80 , particularly preferably about 75 % of the diameter of the second duct.
  • the first duct has a diameter of about 200 to 400 millimeter, preferably about 300 millimeter, and/or that the second duct has a diameter of about 300 to 500 millimeter, preferably around 400 millimeter. However, it is preferred to choose these diameters according to the desired flow of the powder material.
  • the total height of the first duct preferably equals the total height of the second duct, the total height of the first duct and of the second duct preferably being in a range of about 2 meter to 8 meter, preferably around 6 meter. But it is possible that the total height of these ducts is smaller than 2 meter or larger than 8 meter, respectively.
  • the height of the first duct is larger than the height of the second duct, or that the height of the second duct is larger than the height of the first duct, respectively.
  • the system for conveying of a powder material, in particular in a hyperdense bed, according to the present invention comprises a bypass device as described above and an upstream duct and a downstream duct, wherein the first duct is connected to the upstream duct and the second duct is connected to the downstream duct.
  • first duct, intermediate duct and second duct each comprise a lower and an upper duct being separated from each other by means of a porous wall, where the lower first duct is supplied with gas at a determined first-duct-pressure value, where the lower intermediate duct is supplied with gas at a determined intermediate-duct-pressure value, and where the lower second duct is supplied with gas at a determined second-duct-pressure value, respectively.
  • the upstream duct and the downstream duct each comprise a lower and an upper duct being separated from each other by means of a porous wall, where the lower upstream duct is supplied with gas at a determined upstream-duct-pressure value and the lower downstream duct is supplied with gas at a determined downstream-duct-pressure value, respectively.
  • these determined pressure values such, that the conditions for the fluidization of the powder material are met so that the powder material is in the hyperdense phase, i.e. in the form of a hyperdense bed.
  • the determined flow values have a likewise influence on the fluidity and are therefore preferably selected such, that the conditions for the fluidization of the powder material are met so that the powder material is in the hyperdense phase, i.e. in the form of a hyperdense bed.
  • the gas supplied by the air injection device into the first duct and into the second duct is associated with a determined flow value and a further determined flow value which are essentially the same.
  • said determined flow value and further determined flow value are different flow values.
  • the determined pressure value (determined flow value) of the air injection device and/or the determined further pressure value (determined further flow value) of the further air injection device are then selected such, that a homogeneous fluidization of the powder material is ensured and facilitated, which enables a stable powder material flow and minimizes the risk of blockage by the powder material.
  • the method of conveying a powder material, in particular in a hyperdense bed, to bypass an obstacle, in a bypass device comprises the step of supplying of gas at a determined pressure value and/or at a determined flow value into said first duct and/or said second duct through at least one air injection device being arranged in one of said first and/or said second duct, such that an average bubble pressure present in the first duct and/or in the second duct and/or in the intermediate duct is stabilized and fluctuations in the powder material flow are reduced.
  • a retention plate may be provided. This drives the bubble pressure downstream of a conveyor device conveying a powder material and enables the maintaining of a minimum bubble at the downstream main conveyor.
  • a retention plate preferably arranged in a bypass device as described above, can be arranged in the downstream duct in the region of connection with the second duct, said retention plate extending perpendicular to the direction of the powder material flow and protruding partially into said downstream duct so as to provide a barrier against a return of the conveyed powder material from the downstream duct back into the second duct.
  • a conveyor device for conveying a powder material in particular in a hyperdense phase, or a bypass device as described above, where said conveyor device or said bypass device, respectively, comprise a retention plate being arranged in the downstream duct in the region of connection with the second duct.
  • Said retention plate extends perpendicular to the direction of the powder material flow and protrudes partially into said downstream duct so as to provide a barrier against a return of the conveyed powder material from the downstream duct back into the second duct.
  • said retention plate can be arranged at the interconnection between these ducts and extend in the downstream duct, from the lower point of interconnection of the second duct with said downstream duct towards the upper point of interconnection of the second duct with said downstream duct with respect to the powder material flow, partially into said downstream duct.
  • Said retention plate can therefore be seen as a barrier arranged within the product material flow, which barrier prevents a backflow of the powder material from the downstream duct back into the second duct, and which enables a stable powder material flow, i.e. it supports the maintenance of the powder material flow also in the downstream duct.
  • the retention plate has a height that equals the height of the powder material flow in the downstream duct.
  • Fig. 1 shows a schematic vertical section through a bypass device according to the invention with an air injection device and a further air injection device according to a first embodiment.
  • Fig. 2 shows a sketch of part of the bypass device according to Figure 1 with an air injection device according to the first embodiment.
  • Fig. 3 shows a sketch of part of the bypass device according to Figure 1 with an air injection device according to a further embodiment.
  • Fig. 4 shows a sketch of part of the bypass device according to Figure 1 with an air injection device according to a further embodiment.
  • Fig. 5 shows a sketch of part of the bypass device according to Figure 1 with an air injection device according to a further embodiment.
  • Fig. 6 shows a sketch of part of the bypass device according to Figure 1 with an air injection device according to a further embodiment.
  • Figure 1 illustrates a bypass device 1 having air injection devices Nl.l, N2.1 and further air injection devices N1.2, N2.2, here in the form of nozzles and further nozzles for supplying gas at a determined pressure, which corresponds here to a modification of a device as it is described, e.g. in EP 1 091 898 Bl.
  • Figure 1 displays the bypass device 1 for conveying a powder material, in particular in a hyperdense phase, comprising a first duct SI which is connectable to an upstream duct Tl, an intermediate duct S3, and a second duct S2 which is connectable to a downstream duct T2.
  • the first duct SI is in connection with the second duct S2 via said intermediate duct S3, such that said powder material is conveyable from said first duct SI via said intermediate duct S3 to said second duct S2.
  • the first duct extends at a first angle a of about 90° angularly inclined to the intermediate duct S3 and the second duct S2 extends at a second angle ⁇ of about 90° angularly inclined to the intermediate duct S3.
  • All ducts have a cylindrical shape and comprise a cylinder wall Wl, WT, W2, W2', W3, W3' which extends along a middle axis Ml, M2, M3, respectively.
  • hyperdense siphon comprising three distinct potential fluidization ducts: at the inlet, the first duct SI comprising here a lower duct Sl.l supplied with gas at a determined first-duct-pressure value P3 and an upper "duct" SI.2, consisting essentially of a column CI connected at one end to the upper duct T1.2 of the upstream duct Tl and at the other end to the upper duct S3.2 of the intermediate duct S3.
  • the intermediate duct S3 comparable to a horizontal air pipe, in which a lower duct S3.1 is supplied with gas at determined intermediate-duct-pressure value P5 and in which an upper duct S3.2, connected at its first end to the upper duct SI.2 of the first duct SI, is connected at its second end to the upper duct S2.2 of the second duct S2.
  • the second duct S2 comprises a lower duct S2.1 supplied with gas at a determined second-duct-pressure value P4 and an upper duct S2.2 consisting essentially of a column C2 connected at one end to the upper duct S3.2 of the intermediate duct S3 and at the other end to the upper duct T2.2 of the downstream duct T2.
  • the horizontal ducts Tl and T2 are at the same level in this case, but there is no reason why the upstream duct and the downstream duct should not be at a different height.
  • the length L of the intermediate duct equals here to about 20 meter, which is sufficient in this case to take the powder material to be conveyed beyond the obstacle. If a greater length L is necessary, it is preferable to connect the intermediate duct S3 with other intermediate ducts S3, S"3, etc., identical to S3, such that they have a common upper duct and lower ducts supplied with gas at a potential fluidization pressure P3, P"3, etc.
  • Column CI is filled with alumina over a height hi such that the free level of the said material 2 is higher than the highest point of the air pipes Tl, T2 and S3.
  • column C2 is filled with alumina over a height h2 such that the free level of the said material 3 is also higher than the highest point of the air pipes Tl, T2 and S3.
  • the intermediate duct S3 is lower than the duct on the two horizontal ducts Tl and T2 and the distance hO is here about 6 meters. Therefore in order to leave free passage for e.g.
  • the pressure values P3 and P4 are adjusted such that the system remains full of alumina at all times.
  • the density of the fluidized product varies from one column to another, i.e. it is lower when the fluidization pressure is higher.
  • the height hi is preferably greater than the height h2, so that the determined first-duct-pressure value P3 will be greater than the determined second-duct-pressure value P4 and that the device will then operate like a hydraulic siphon.
  • the bypass device 1 shown here additionally comprises one nozzle Nl. l and one further nozzle N1.2 that are arranged in the first duct SI, as well as one nozzle N2.1 and one further nozzle N2.2 that are arranged in the first duct S2, respectively.
  • the powder material flow is defined as extending from the upstream duct Tl via the first duct SI to the intermediate duct S3 to the second duct S2 into the downstream duct T2, as indicated by the arrows in Figure 1.
  • the further nozzle N1.2 is arranged after the nozzle Nl. l in the first duct SI and the further nozzle N2.2 is arranged before the nozzle N2.1 in the second duct S2, respectively.
  • the nozzles Nl. l, N2.1 and further nozzles N1.2, N2.2 are arranged in the first duct SI and in the second duct S2 in the region of connection of the respective duct with the intermediate duct S3.
  • the nozzle Nl.l of the first duct SI and the nozzle N1.2 of the second duct are arranged at a height being about 1/3 of the total height HI of the first duct SI and of the total height H2 of the second duct S2, respectively.
  • the nozzle Nl. l, N2.1 and the further nozzle N1.2, N2.2 are spaced at a distance d with respect to each other.
  • the diameter of the first duct Dl is smaller than the diameter of the second duct D2 and the total height of the first duct HI is larger than the total height of the second duct H2.
  • said retention plate can be arranged at the interconnection between these ducts and extend in the downstream duct, from the lower point of interconnection of the second duct with said downstream duct towards the upper point of interconnection of the second duct with said downstream duct with respect to the powder material flow, partially into said downstream duct.
  • a retention plate R is arranged in the downstream duct T2 in the region of connection with the second duct S2, i.e. at the interconnection between the downstream duct T2 and the second duct S2.
  • the retention plate R extends perpendicular to the direction of the powder material flow and protrudes partially into said downstream duct T2 so as to provide a barrier against a return of the conveyed powder material from the downstream duct T2 back into the second duct S2.
  • the bypass device may comprise a plurality of these nozzles and one or a plurality of further nozzles.
  • many of the features discussed above with reference to Figure 1 are left away in these Figures to allow a better view, but should nevertheless be seen as comprised in the bypass device.
  • the nozzles Nl. l, Nl.l', Nl.l “, Nl. l' “, N2.1, N2.1', N2.1", N2.1' " comprise nozzle openings NO configured to spread the gas over the complete cross-section of the first duct SI and of the second duct S2, respectively.
  • Figure 2 shows a nozzle design according to a first embodiment, where the nozzle Nl.
  • nozzle Nl.l is designed with a truncated-cone-shape having a minimized nozzle surface area ("footprint"), and which is arranged in the center of the first duct SI.
  • the nozzle Nl.l has a nozzle diameter DN that is smaller than the diameter of the first duct SI.
  • a nozzle opening NO is formed in the apex of the cone so as to spread the gas over the complete cross-section of the first duct SI.
  • at least one further nozzle N1.2 as well as a nozzle N1.2 and further nozzle N2.2 of the same kind can be arranged in the center of the first duct SI and of the second duct S2, respectively.
  • Figures 3 and 4 depict a nozzle design according to a further embodiment, where the nozzle ⁇ 1. is designed as a nozzle pipe that extends fully across the first duct SI ( Figure 3) and only partially into said duct SI.
  • the nozzle pipe extends from one side wall Wl of the first duct SI to the opposite side wall Wl' of said duct.
  • the nozzle pipe is arranged perpendicularly with respect to the powder material flow within the first duct SI and has a diameter DN, i.e. a lateral expansion, which is smaller than the diameter of first duct Dl.
  • the nozzle pipe shown in Figure 3 comprises several nozzle openings NO that are formed on the nozzle pipe along the direction of extension of the nozzle pipe within the first duct SI and the nozzle pipe shown in Figure 4 only comprises one nozzle opening NO, in both cases it is possible that the respective nozzle pipe comprises only one or several nozzle openings, respectively.
  • at least one further nozzle N1.2' as well as a nozzle N1.2' and further nozzle N2.2' of the same kind can be arranged in first duct S 1 and the second duct S2, respectively.
  • Figure 5 depicts a nozzle design according to a further embodiment, where the nozzle Nl.l" is designed as a nozzle pipe being arranged in the side wall Wl of the first duct SI and extending along a vertical direction of said first duct. That is, the nozzle pipe extends within the side wall Wl of the first duct SI in parallel with the direction of the powder material flow within said duct.
  • the individual nozzle of said nozzle pipe has a truncated- cone-shape and comprises a nozzle opening formed in the apex of the cone so as to spread the gas over the complete cross-section of the respective duct.
  • At least one further such nozzle N1.2" can be comprised in said nozzle pipe in the first side wall Wl of the first duct SI and a nozzle pipe N1.2", N2.2" of the same kind can be arranged in the side wall W2 of the second duct S2, respectively.
  • Figure 6 depicts a nozzle design according to a further embodiment, where a plurality of nozzles Nl. l" 'are designed as a nozzle ring which extends along a circumferential direction of the first duct SI.
  • said nozzle ring is of a circular cylindrical shape, too, and is arranged within the cylindrical side wall Wl, Wl' of the first duct S I and extends in a circumferential direction along the middle axis Ml of said duct.
  • a plurality of further such nozzles N1.2' " can be comprised in a further nozzle ring in the first side wall Wl of the first duct SI, and a nozzle ring with nozzles N1.2" ' and as well as a further nozzle ring with further nozzles N2.2' " of the same kind can be arranged in the side wall W2 of the second duct S2, respectively.
  • Nl .2" , Nl .2" ' further air injection device of first duct N2.2, N2.2',
  • N2.2' ' , N2.2' ' ' further air injection device of second duct NO air injection device opening

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Transport Of Granular Materials (AREA)

Abstract

L'invention concerne un dispositif de dérivation (1) pour transporter un matériau en poudre, en particulier sous une phase hyper dense, ledit dispositif comprenant un premier conduit (S1) qui peut être relié à un conduit amont (T1), un conduit intermédiaire (S3) et un second conduit (S2) qui peut être relié à un conduit aval (T2). Le premier conduit (SI) est relié au second conduit (S2) par ledit conduit intermédiaire (S3), de telle sorte que ledit matériau en poudre peut être transporté dudit premier conduit (S1), par ledit conduit intermédiaire (S3), audit second conduit (S2). Le premier conduit (S1) s'étend selon un premier angle (a) incliné angulairement par rapport au conduit intermédiaire (S3) et le second conduit (S2) s'étend selon un second angle (β) incliné angulairement par rapport au conduit intermédiaire (S3). Le dispositif de dérivation comprend en outre au moins un dispositif d'injection d'air (N1.1, N1.1', N1.1", N2.1, N2.1', N2.1") qui est agencé dans l'un desdits premier et/ou second conduits (S1 ; S2) pour fournir un gaz à une valeur de pression déterminée (P1) et/ou à une valeur d'écoulement déterminée (F1) dans lesdits premier et/ou second conduits (S1, S2).
EP17704437.7A 2016-02-12 2017-02-07 Dispositif et procédé pour transport de matériaux en poudre en phase hyper dense Withdrawn EP3414196A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH1872016 2016-02-12
EP16167051 2016-04-26
PCT/EP2017/052637 WO2017137392A1 (fr) 2016-02-12 2017-02-07 Dispositif et procédé pour transport de matériaux en poudre en phase hyper dense

Publications (1)

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EP3414196A1 true EP3414196A1 (fr) 2018-12-19

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EP (1) EP3414196A1 (fr)
WO (1) WO2017137392A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150320B (de) * 1957-09-11 1963-06-12 Peters Ag Claudius Pneumatische Foerderrinne fuer staubfoermige und feinkoernige Gueter
US3432398A (en) * 1964-07-14 1969-03-11 Allied Chem Charging coke oven with hot coarsely comminuted coal
US3253865A (en) * 1965-03-11 1966-05-31 Kanics Andras Apparatus for handling bulk material
JPS58135032A (ja) * 1982-02-04 1983-08-11 Denka Consult & Eng Co Ltd 大量長距離輸送配管
DE8802886U1 (fr) * 1988-02-22 1988-06-01 Deffner, Kurt, 4390 Gladbeck, De
GB2266874A (en) * 1992-05-06 1993-11-17 Blovac Pneumatics Limited Fluid conveying device.
AUPN227395A0 (en) * 1995-04-07 1995-05-04 Commonwealth Scientific And Industrial Research Organisation A non-mechanical valve
FR2779136B1 (fr) * 1998-06-02 2000-07-28 Pechiney Aluminium Procede de convoyage en phase hyperdense de materiaux pulverulents applicable au contournement d'obstacles
DE20211376U1 (de) * 2002-07-27 2003-01-09 Sommer Technik Gmbh Vorrichtung zum pneumatischen Fördern von Schüttgut
DE102009014984A1 (de) * 2009-03-30 2010-10-14 Coperion Gmbh Pneumatisches Fördersystem für fließfähiges Schüttgut sowie Förderrohr für ein derartiges Fördersystem
JP2016537593A (ja) * 2013-10-03 2016-12-01 エム−アイ リミテッド ライアビリティ カンパニー バルク輸送操作用ホース

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