WO1994024031A1 - Procede de chargement d'une cuve en materiau particulaire - Google Patents

Procede de chargement d'une cuve en materiau particulaire Download PDF

Info

Publication number
WO1994024031A1
WO1994024031A1 PCT/GB1994/000800 GB9400800W WO9424031A1 WO 1994024031 A1 WO1994024031 A1 WO 1994024031A1 GB 9400800 W GB9400800 W GB 9400800W WO 9424031 A1 WO9424031 A1 WO 9424031A1
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
separator means
particulate material
dust
vacuum
Prior art date
Application number
PCT/GB1994/000800
Other languages
English (en)
Inventor
Patrick Sheehan
Original Assignee
Technivac Limited
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 Technivac Limited filed Critical Technivac Limited
Publication of WO1994024031A1 publication Critical patent/WO1994024031A1/fr

Links

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
    • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/18—Preventing escape of dust
    • B65G69/181—Preventing escape of dust by means of sealed systems
    • B65G69/182—Preventing escape of dust by means of sealed systems with aspiration means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
    • B01J8/003—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor in a downward flow
    • 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
    • B65G53/24—Gas suction systems
    • 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
    • B65G53/60—Devices for separating the materials from propellant gas
    • 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
    • B65G53/60—Devices for separating the materials from propellant gas
    • B65G53/64—Devices for separating the materials from propellant gas in discrete amounts

Definitions

  • the present invention relates to a method of charging a vessel with particulate material, and particularly to such a method for use where harmful dust may be evolved during charging.
  • Particulate solids are conventionally conveyed pneumatically using high velocity air or gas under negative pressure (vacuum) .
  • Such pneumatic conveying systems are used extensively in the oil, gas, chemical and petrochemical industries to charge (or load) reactor vessels with catalyst pellets.
  • a method of charging a vessel with particulate material comprises: a) inducing flow of a transport gas along a flowpath extending from an upstream store of said particulate material to downstream vacuum means arranged to induce said flow such that said particulate material is drawn from said store; b) providing separator means in said flowpath arranged to separate said particulate material and said transport gas, such that when said transport gas passes along a portion of said flowpath downstream of said separator means said gas is substantially free of said particulate material; c) discharging from said separator means particulate material separated thereby, into said vessel, thereby charging said vessel; wherein, d) valve means is selectively actuated to permit dust or other airborne material to be drawn from the interior of said vessel by said vacuum means whilst simultaneously substantially inhibiting said particulate material being drawn from said upstream store.
  • respective vacuum lines are provided upstream and downstream of the separator means defining the flowpath to and from the separator means respectively.
  • a further vacuum line is provided extending, in use, from a first end disposed in the interior of the vessel to a second end communicatively connected to the vacuum line downstream of the separator means.
  • the further vacuum line defines a flowpath from the interior of the vessel along which the dust or other airborne material is drawn.
  • the communicative connection between the further vacuum line and the vacuum line downstream of the separator means comprises respective communicating manifold members, advantageously extending transversely to one another, which comprise part of the separator means.
  • the valve means is provided in the further vacuum line, and actuable between an open position, in which communication between the further vacuum line and the vacuum line downstream of the separator means is permitted, and a closed position in which communication between the further vacuum line and the vacuum line downstream of the separator means is substantially inhibited.
  • the valve means is preferably manually operable, however in certain circumstances, the valve means may be arranged to be actuated automatically, for example when a predetermined quantity of particulate material has been accumulated in the separator means. It is preferred that the flow path downstream of the separator means is the same for both the transport gas drawn from the store and also the dust or other particulate material drawn from the interior of the vessel.
  • filter or further separator means is provided downstream of the communicative connection between the further vacuum line and the vacuum line downstream of the first-mentioned separator means, such that the dust or other airborne material drawn from the interior of the vessel may be removed from the flow before reaching the vacuum means.
  • the filter or further separator means is arranged to selectively discharge the dust or other material accumulated therein into containers, which are advantageously sealingly connected to the filter or further separator means during filling.
  • the vessel is charged by discharging the material accumulated in the first-mentioned separator, preferably along a discharge hose, into the interior of the vessel via a manway or port provided in the uppermost region of the vessel.
  • the dust or other airborne material evolved in the vessel is also drawn through a manway or port (which is preferably the same manway or port) provided in the uppermost region of the vessel.
  • actuation of the valve means causes the particulate material accumulated in the separator means to be discharged into the vessel.
  • the vacuum means comprises a vacuum pumping unit, compressor or the like.
  • the first-mentioned separator means comprises an internal structural configuration arranged to cause the transport gas passing into the separator means from the upstream vacuum line to undergo at least 180° change of direction before passing out of the separator means via the downstream vacuum line.
  • the velocity change of the transport gas in the separator means causes the particulate material to be deposited therein.
  • conventional gas/particle filters may be used to separate the transport gas and particulate material in the separator means.
  • Figure 1 is a perspective view of vacuum loading apparatus suitable for use in the method according to the invention
  • Figure 2 is a schematic plan view of a part of the apparatus of Figure 1 showing flow patterns in the apparatus;
  • FIG. 3 is a schematic flow diagram of a vessel charging system for use in the method according to the invention.
  • the separator unit 1 comprises upper and lower halves la,lb bolted together at flange 6 to define a separation chamber 7 having a curved upper surface 8 and an inclined lower surface 9.
  • the separator unit 1 is provided with a catalyst inlet duct 10 for connection, by flexible conveying hose (not shown) to a catalyst store 11, the catalyst inlet duct 10 extending part way into the chamber 7.
  • a vacuum duct 13 is communicatively connected intermediate the open ends of the catalyst inlet duct 10 and extends transversely thereto in a downward direction.
  • the vacuum duct 13 is communicatively connected via suitable conveying hosing 13b and intermediate filter separator hopper 12, to the suction side of a vacuum unit 14.
  • a dust extraction duct 15 is ported to the vacuum duct 13 and connected to one end of a flexible dust extraction hose 16, the other end of which is, in use, positioned in the reactor vessel 4.
  • a vacuum relief valve 18 is provided which is operable selectively open or close dust extraction duct 15 (alternatively, the vacuum relief valve could be provided in the vacuum duct 13 above the level of connection of dust extraction duct 15) .
  • the separator unit 1 is provided with an unloading outlet duct 17 connectable to a flexible unloading hose 17a which extends into the reactor vessel 4. In use, the telescopic support legs 2 of the separator unit 1 are extended to position the separator unit 1 in the position shown in Figure 3 with the unloading outlet duct 17 above the open top manway 3 of reactor vessel 4.
  • the unloading outlet duct 17 and dust extraction duct 15 are then coupled to respective flexible hoses which extend into the reactor vessel 4 through manway 3.
  • Catalyst inlet duct 10 is connected via flexible hose to the catalyst store 11, and the vacuum duct 13 connected via vacuum hose to filter separator hopper 12 which is in turn connected via vacuum hose to the suction side of vacuum unit 14.
  • the high pressure side of vacuum unit 14 vents to atmosphere.
  • vacuum relief valve 18 is closed and the vacuum unit 14 is started.
  • the vacuum unit is used to cause a transport gas (typically air although an inert gas such as nitrogen may be used where required) to flow under negative pressure through the system.
  • Particulate catalyst material is carried by the transport gas from the catalyst store 11, along the path shown in Figure 3, to the catalyst inlet duct 10 of the separator unit 1.
  • the transport gas and particulate catalyst material is carried into the chamber 7 by means of duct 10 where the transport gas is forced to reverse direction (as shown in Figures 2 and 3) and pass through separator baffles 19 into the vacuum duct 13.
  • the velocity of the transport gas reduces causing the particulate catalyst material 5 to be deposited in the separator unit 1.
  • Some of the catalyst material 5 deposited in unit 2 passes directly under gravity along the hose extending from the unloading outlet duct into the reactor vessel 4 , however the bulk of the catalyst material deposited remains in the hopper due to the vacuum back pressure caused by the transport gas passing into vacuum duct 13.
  • a gauze filter or the like may be appropriately positioned to inhibit catalyst material being carried into the vacuum duct 13. Transport gas passes from the vacuum duct 13 along the interconnecting vacuum hose to the filter separator hopper 12 and on to the suction side of vacuum unit 14.
  • vacuum relief valve 18 is opened causing the gas flowpath in the system to change. Opening of vacuum relief valve 18 causes transport gas to be drawn directly through dust extraction duct 15 and not from the catalyst store 11. With valve 18 in its open position therefore, there is substantially no transport of particulate catalyst material from catalyst store 11 to the separator unit 1. Instead, transport gas drawn through dust extraction duct 15 passes directly into the vacuum duct 13 and on to filter separator hopper 12.
  • the free end of the hose 16 connected to dust extraction duct 15 is positioned in the interior of reactor 4.
  • valve 18 is opened the bulk of catalyst deposited in separator unit 1 passes under gravity from the separator unit l into interior of reactor 4 via the hose connected to unloading duct 17.
  • the system transport gas flow path changes as described above, and catalyst dust thrown up as the catalyst material passes into the reactor vessel 4, is drawn along hose 16 and into dust extraction duct 15.
  • the catalyst dust then passes into vacuum duct 13 and on to filter separator hopper 12.
  • Filter separator hopper 12 is provided with a filtration system for separating the transport gas from the catalyst dust leaving the catalyst dust deposited in the hopper 12.
  • the filtered transport gas then passes on to the vacuum unit 14, whilst the catalyst dust is unloaded from the hopper 12 via a valve 21 into sealed collection drums 22.
  • valve 18 When the bulk of catalyst material deposited in the separation unit 1 has been unloaded into the reactor 4, valve 18 is closed, reverting the system transport gas flowpath to that originally described, and further catalyst material is drawn from the catalyst store and deposited in the chamber 7 of separator unit 1. The procedure described above in relation to the opening and closing of vacuum relief valve 18 is repeated until sufficient catalyst material has been deposited in reactor vessel 4 to build up the required depth of catalyst bed.
  • the apparatus according to the invention provides for clean, convenient and systematic deposition of catalyst material in a reactor vessel and has the significant advantage that hazardous catalyst dust evolved during deposition may be removed from the reactor vessel without being dispersed to the atmosphere.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

Le chargement s'effectue à l'aide d'un séparateur à dépression (1) placé au sommet de la cuve de réacteur (4). Le séparateur à dépression provoque le déplacement d'un gaz de transport le long d'un passage issu d'un magasin (11) de matériau particulaire (5) d'où ce dernier est extrait. Le séparateur à dépression (1) assure la séparation du gaz de transport et du matériau particulaire par inversion du flux de gaz dans une chambre (7). En effet, la vitesse du gaz de transport est aini réduite, ce qui provoque le dépôt de matériau particulaire (5) dans le séparateur (1). Le matériau particulaire est ensuite déchargé dans la cuve (4) du réacteur à travers la sortie d'un conduit de décharge (17). La poussière dégagée lors du passage du matériau particulaire dans la cuve (4) du réacteur, est récupérée à l'aide d'un tuyau (16) dans un conduit d'extraction (15), puis envoyée dans une trémie de séparation (12) permettant de séparer la poussière et le gaz de transport.
PCT/GB1994/000800 1993-04-15 1994-04-15 Procede de chargement d'une cuve en materiau particulaire WO1994024031A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9307780.8 1993-04-15
GB939307780A GB9307780D0 (en) 1993-04-15 1993-04-15 Method of charging a vessel with particulate material

Publications (1)

Publication Number Publication Date
WO1994024031A1 true WO1994024031A1 (fr) 1994-10-27

Family

ID=10733870

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/000800 WO1994024031A1 (fr) 1993-04-15 1994-04-15 Procede de chargement d'une cuve en materiau particulaire

Country Status (2)

Country Link
GB (1) GB9307780D0 (fr)
WO (1) WO1994024031A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1138376A2 (fr) * 2000-03-31 2001-10-04 Catalyst Handling Research & Engineering Limited Manipulation de particules
EP1545738A2 (fr) * 2002-08-16 2005-06-29 Therma Corporation, Inc. Pompe a mout et marc de vin
WO2007000589A3 (fr) * 2005-06-27 2007-02-15 Clean Cat Technologies Ltd Dispositif et procede de commande de la vitesse de transport pneumatique
WO2007057667A1 (fr) * 2005-11-16 2007-05-24 Clean Cat Technologies Limited Appareil et procede de modulation de la vitesse d’acheminement par aspiration d’une matiere particulaire
CN105383961A (zh) * 2015-12-10 2016-03-09 重庆福悦安科技有限公司 烧碱成品放料装置
CN111977378A (zh) * 2019-05-22 2020-11-24 湖南云箭集团有限公司 适用于增材制造设备的多种粉料智能上料机构
US11713201B1 (en) * 2022-02-18 2023-08-01 Sk On Co., Ltd. Vacuum-type powder transfer system and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE595796C (de) * 1930-12-11 1934-04-20 Henschel & Sohn A G Einrichtung zum UEberfuellen von staubfoermigen Stoffen aus einem Behaelter oder Bunker in einen tiefer gelegenen bei Unterdruck in beiden Behaeltern
EP0305152A1 (fr) * 1987-08-25 1989-03-01 Technivac Limited Système de transport pneumatique
WO1992005858A1 (fr) * 1990-10-06 1992-04-16 Technivac Ltd. Separation et stockage de solides particulaires

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE595796C (de) * 1930-12-11 1934-04-20 Henschel & Sohn A G Einrichtung zum UEberfuellen von staubfoermigen Stoffen aus einem Behaelter oder Bunker in einen tiefer gelegenen bei Unterdruck in beiden Behaeltern
EP0305152A1 (fr) * 1987-08-25 1989-03-01 Technivac Limited Système de transport pneumatique
WO1992005858A1 (fr) * 1990-10-06 1992-04-16 Technivac Ltd. Separation et stockage de solides particulaires

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1138376A2 (fr) * 2000-03-31 2001-10-04 Catalyst Handling Research & Engineering Limited Manipulation de particules
EP1138376A3 (fr) * 2000-03-31 2003-05-14 Catalyst Handling Research & Engineering Limited Manipulation de particules
EP1545738A2 (fr) * 2002-08-16 2005-06-29 Therma Corporation, Inc. Pompe a mout et marc de vin
EP1545738A4 (fr) * 2002-08-16 2005-11-16 Therma Corp Inc Pompe a mout et marc de vin
US7105040B2 (en) 2002-08-16 2006-09-12 Therma Corporation, Inc. Wine must and pomace pump
WO2007000589A3 (fr) * 2005-06-27 2007-02-15 Clean Cat Technologies Ltd Dispositif et procede de commande de la vitesse de transport pneumatique
WO2007057667A1 (fr) * 2005-11-16 2007-05-24 Clean Cat Technologies Limited Appareil et procede de modulation de la vitesse d’acheminement par aspiration d’une matiere particulaire
US8491228B2 (en) 2005-11-16 2013-07-23 Brian Snowdon Vacuum conveying velocity control apparatus and method for particulate material
CN105383961A (zh) * 2015-12-10 2016-03-09 重庆福悦安科技有限公司 烧碱成品放料装置
CN111977378A (zh) * 2019-05-22 2020-11-24 湖南云箭集团有限公司 适用于增材制造设备的多种粉料智能上料机构
US11713201B1 (en) * 2022-02-18 2023-08-01 Sk On Co., Ltd. Vacuum-type powder transfer system and method
US11897709B2 (en) 2022-02-18 2024-02-13 Sk On Co., Ltd. Vacuum-type powder transfer system and method

Also Published As

Publication number Publication date
GB9307780D0 (en) 1993-06-02

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