Device and method for dispensing catalyst pellets
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-008/00
B01J-008/06
출원번호
US-0848269
(2013-03-21)
등록번호
US-9149778
(2015-10-06)
발명자
/ 주소
Johns, Clifford L.
Chasmawala, Munaf
McAndrews, Dennis
출원인 / 주소
Extundo Incorporated
대리인 / 주소
Camoriano and Associates
인용정보
피인용 횟수 :
0인용 특허 :
18
초록▼
A device and method for dispensing catalyst pellets from a hopper to a chemical reactor. The hopper receives and holds the catalyst pellets at an elevation above the elevation of the chemical reactor. The flow of the catalyst pellets is controlled so they flow into and through a conduit in a widely
A device and method for dispensing catalyst pellets from a hopper to a chemical reactor. The hopper receives and holds the catalyst pellets at an elevation above the elevation of the chemical reactor. The flow of the catalyst pellets is controlled so they flow into and through a conduit in a widely spaced-apart arrangement to the chemical reactor. This controlled, spaced-apart flow is created by providing a sieve between a hopper and the conduit having openings small enough that the catalyst pellets form bridges above the openings, and then repeatedly breaking up the bridges in a controlled manner.
대표청구항▼
1. A method for dispensing catalyst pellets to a chemical reactor, comprising the steps of: providing a hopper for holding a plurality of catalyst pellets at an elevation above the chemical reactor;loading a plurality of catalyst pellets into the hopper;providing a large diameter open conduit throug
1. A method for dispensing catalyst pellets to a chemical reactor, comprising the steps of: providing a hopper for holding a plurality of catalyst pellets at an elevation above the chemical reactor;loading a plurality of catalyst pellets into the hopper;providing a large diameter open conduit through which the catalyst pellets pass in order to flow from the hopper to the chemical reactor, with the diameter of the conduit being at least eight times the largest dimension of the catalyst pellets;providing a sieve between the hopper and the conduit defining a plurality of openings that are small enough relative to the size of the catalyst pellets so that the catalyst pellets form bridges above the sieve; andrepeatedly breaking the bridges to allow the catalyst pellets to flow through the openings in a controlled manner to form a flow in which the catalyst pellets are separated from each other in a homogeneous manner and have minimal or no contact with each other as they fall through the open conduit. 2. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 1, wherein a cross-section taken through the conduit as the catalyst pellets are flowing through the conduit has 26% or less of the cross-sectional area occupied by catalyst pellets. 3. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 2, wherein the sieve comprises upper and lower plates, with the upper plate lying on top of the lower plate, wherein said upper plate defines a plurality of upper openings and the lower plate defines a plurality of lower openings which can be aligned with respective upper openings, wherein, when the upper and lower plates are stationary, with the upper and lower openings aligned, the upper and lower openings together form the plurality of openings that are small enough relative to the size of the catalyst pellets so that the catalyst pellets form bridges above the openings; and wherein the step of breaking up the bridges includes moving at least one of the upper and lower plates parallel to the other of the upper and lower plates, thereby breaking up the bridges of catalyst pellets above the upper openings and further including the step of allowing the catalyst pellets to flow through the aligned upper and lower openings and then into and through the conduit. 4. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 2, and further comprising the step of vacuuming a stream of gas out of the side of the conduit as the catalyst pellets flow through the conduit to remove dust from the catalyst pellets. 5. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 3, and further comprising the step of moving at least one of the upper and lower plates parallel to the other of the upper and lower plates so that the upper and lower openings are out of alignment with each other, thereby preventing the flow of catalyst pellets from the hopper to the conduit. 6. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 5, and further comprising the steps of providing a cover on top of the hopper and opening the cover to load catalyst pellets into the hopper. 7. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 6, and further comprising the step of vacuuming a stream of gas out of the side of the conduit as the catalyst pellets flow through the conduit to remove dust from the catalyst pellets. 8. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 5, wherein said upper and lower plates are planar plates, oriented horizontally. 9. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 7, wherein said upper and lower plates are planar plates, oriented horizontally. 10. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 1, wherein the conduit has a first end adjacent to the hopper and a second end at a lower elevation than the first end, and further comprising the step of automatically controlling the movement of the second end of the conduit inside the reactor vessel along a desired path in order to provide uniform loading. 11. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 9, wherein the conduit has a first end adjacent to the hopper and a second end at a lower elevation than the first end, and further comprising the step of automatically controlling the movement of the second end of the conduit inside the reactor vessel along a desired path in order to provide uniform loading. 12. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 1, wherein a maximum flow rate is defined as the maximum number of catalyst pellets that can pass through the conduit per unit of time, and wherein the flow rate of catalyst pellets as the catalyst pellets are flowing through the conduit is not greater than half of the maximum flow rate. 13. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 12, wherein the sieve includes upper and lower plates, with the upper plate lying on top of the lower plate, said upper and lower plates being located between the hopper and the conduit, wherein said upper plate defines a plurality of upper openings and the lower plate defines a plurality of lower openings which can be aligned with respective upper openings, wherein, when the upper and lower plates are stationary, with the upper and lower openings aligned, the upper and lower openings together form the plurality of openings that are small enough relative to the size of the catalyst pellets so that the catalyst pellets form bridges above the openings; and wherein the step of breaking up the bridges includes moving at least one of the upper and lower plates parallel to the other of the upper and lower plates, and further comprising the step of allowing the catalyst pellets to flow through the aligned upper and lower openings and then into and through the conduit. 14. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 12, and further comprising the step of vacuuming a stream of gas out of the side of the conduit as the catalyst pellets flow through the conduit to remove dust from the catalyst pellets. 15. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 13, and further comprising the step of moving at least one of the upper and lower plates parallel to the other of the upper and lower plates so that the upper and lower openings are out of alignment with each other, thereby preventing the flow of catalyst pellets from the hopper to the conduit. 16. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 15, and further comprising the steps of providing a cover on top of the hopper and opening the cover to load catalyst pellets into the hopper. 17. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 16, and further comprising the step of vacuuming a stream of gas out of the side of the conduit as the catalyst pellets flow through the conduit to remove dust from the catalyst pellets. 18. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 15, wherein said upper and lower plates are planar plates, oriented horizontally. 19. A method for dispensing catalyst pellets to a chemical reactor as recited in claim 17, wherein said upper and lower plates are planar plates, oriented horizontally.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (18)
Lytton Irvin V. (Dickinson TX) Burgin Billy B. (Starks LA), Catalyst loader.
Johns, Clifford L.; Camoriano, Guillermo; Chasmawala, Munaf Najmuddin; Schmidt, Manfred; Gates, Samuel Richard; Franklin, Wayne Howard, Device and method for identifying the row number on a tubesheet.
Johns, Clifford L; Sympson, Daniel D.; Dattilo, III, August M.; Chasmawala, Munaf Najmuddin; Schmidt, Manfred, Device for loading chemical reactor tubes.
Bequette Todd A. ; Kelly Jeffrey C. ; Krave Thomas J. ; Porter Robert S. ; Dorband Michael J. ; Green Mark W., Raw material delivery system for compacting press.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.