Apparatus for dispensing particulate material

{
  "publication_number": "US5558484A",
  "country": "US",
  "kind": "A",
  "title": "Apparatus for dispensing particulate material",
  "abstract": "A dispensing apparatus for particulate matter which distributes the particulate matter, at substantially the same rate, uniformly across a given area. The apparatus is particularly suitable for dispensing particulate matter in a vessel having a centrally located vertical support member.",
  "claims": [
    "1. An apparatus for dispensing particulate material onto a particle bed within a vessel having a vertical longitudinally extended central member, said apparatus comprising: (a) a bearing ring encircling and supported by said central member and defining a bearing surface; (b) particulate material dispensing means supported by said bearing ring, said dispensing means comprising an annular particle container adapted to surround said central member and defining an annular opening at one end for receiving particulate material into an upwardly directed end and an outlet at an opposite end for discharging particulate material below said annular opening; (c) means for rotatably supporting said particulate material dispensing means from said bearing surface and restraining radial and longitudinal movement of said particulate material dispensing means relative to said bearing ring; (d) particulate material feed means fixed to said central member and offset radially from the longitudinal axis thereof and adapted to feed particulate material to said annular opening of said annular particle container; and (e) means for rotating said particulate material dispensing means relative to said bearing ring.",
    "2. The apparatus of claim 1 wherein said annular particle container comprises a subadjacent inclined surface, said subadjacent inclined surface having a slope that outwardly directs particulate material from the center of said annular particle container.",
    "3. The apparatus of claim 1 wherein at least one horizontal particulate matter distributor arm is attached to the lower extremity of said annular particle container and said annular particle container includes an inclined surface which directly communicates particulate material from said annular particle container to said distributor arm.",
    "4. The apparatus of claim 1 wherein said bearing ring comprises two separable semi-circular portions.",
    "5. The apparatus of claim 1 wherein said outlet defines at least one aperture for discharging said particulate material.",
    "6. The apparatus of claim 1 wherein said means to rotate said particulate material dispensing means is a motor.",
    "7. The apparatus of claim 6 wherein said motor is a pneumatic motor.",
    "8. The apparatus of claim 1 wherein said annular particle container comprises two separable semi-circular portions.",
    "9. An apparatus for dispensing particulate material into a particle bed within a vessel having a vertical longitudinally extended central member which comprises: (a) a bearing ring encircling and supported by said central member defining a vertical longitudinal axis radially offset from said central member and a horizontal radial axis; (b) a first bearing surface fixed relative to said bearing ring; (c) particulate material dispensing means supported by said bearing ring, said dispensing means comprising an annular particle container for said particulate material adapted to surround said central member and defining an annular space, an upwardly directed annular opening for receiving particulate material, a second bearing surface, and particle discharge means; (d) a first roller fixed relative to said particulate material dispensing means and rotatable about said horizontal radial axis to support said particulate material dispensing means by contact with said first bearing surface; (e) a second bearing surface fixed relative to said bearing ring; (f) a second roller fixed relative to said particulate material dispensing means and rotatable about said vertical longitudinal axis to guide said particulate material dispensing means by contact with said second bearing surface; (g) said particle discharge means extending downwardly from said annular particle container and in communication with said annular particle container, said particle discharge means defining an outlet for dispensing particulate material whereby said particulate material flows from said annular particle container through said discharge means and is dispensed through said outlet; (h) particulate material feed means fixed to said central member and offset radially from the longitudinal axis thereof and adapted to feed particulate material to said annular opening of said annular particle container; and (i) means for rotating said particulate material dispensing means relative to said bearing ring.",
    "10. The apparatus of claim 9 wherein said annular particle container comprises a subadjacent inclined surface, said subadjacent inclined surface having a slope that outwardly directs particulate material from the center of said annular particle container.",
    "11. The apparatus of claim 9 wherein said bearing ring comprises two separable semi-circular portions.",
    "12. The apparatus of claim 9 wherein said means for rotating said particulate material dispensing means comprises a motor.",
    "13. The apparatus of claim 12 wherein said motor is a pneumatic motor.",
    "14. The apparatus of claim 9 wherein said annular particle container comprises two separable semi-circular portions.",
    "15. A method for loading particulate material into a vessel having a vertical longitudinally extended central member and distributing said particulate material, at substantially the same rate, uniformly across the area of said vessel by means of a dispensing apparatus comprising: (a) introducing said particulate material into particulate material dispensing means rotatably supported by said central member and having an annular particle container adapted to surround said central member and defining an annular opening at one end for receiving said particulate material into an upwardly directed end and an outlet at an opposite end for discharging said particulate material below said annular opening, said particulate material introduced by means of particulate material feed means fixed to said central member and offset radially from the longitudinal axis thereof and adapted to feed said particulate material to said annular opening of said annular particle container; (b) rotating said particulate material dispensing means on a bearing ring encircling said central member and defining a bearing surface; and (c) causing said particulate material to be discharged from said outlet into said vessel."
  ],
  "description_excerpt": "The invention relates to a dispensing apparatus which distributes particulate matter uniformly across a given cross-sectional area. More particularly, this invention relates to an apparatus which is useful for loading catalyst particles in a reactor vessel which results in a uniform catalyst bed.\n\nIn the past, particulate matter has been loaded into vessels or dispensed by what is commonly referred to as the \"sock\" method wherein a hopper having an attached hose extends to the bottom of the vessel or to the surface of the previously dispensed particulate matter. The hopper and hose are filled with particulate matter and the particulates are released at the bottom the hose by slowly raising the hose to thereby permit the particulate matter to flow through the hose. The resulting dispensed particulates are in the shape of a cone which, during the dispensing of particulates, can be distributed over the entire given area by raking. Commercial catalytic reaction zone vessels or reactors varying in width or diameter from about 1 foot to about 15 feet or more, having a length from about 5 feet to about 70 feet or more are loaded by the hereinabove described \"sock\" technique. One of the problems that is associated with loading reactors by this method is that the catalyst bed can contain excessive voids which can, during the use of the catalyst, bring about catalyst settling problems or \"slumping\", localized hot spots during the exothermic reactions of reactants and the necessity to utilize increased reactor volume.",
  "cpc": [
    "B01J 8/002",
    "B01J 2208/00752",
    "B65G 69/0458"
  ],
  "ipc": [
    "B01J 8/00",
    "B65G 69/04"
  ],
  "assignees": [
    "UOP INC"
  ],
  "inventors": [
    "MIKULICZ MICHAEL Z",
    "GUREVICH SERGE"
  ],
  "filing_date": "1995-04-28",
  "publication_date": "1996-09-24",
  "grant_date": "1996-09-24",
  "priority_date": "1993-12-22",
  "application_number": "US-43064595-A",
  "family_id": "22611729",
  "citations": [
    "JPS586844A",
    "US3285438A",
    "US3995753A",
    "US4300725A",
    "US5209607A"
  ]
}