Decoking nozzle assembly
First Claim
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1. An improved decoking nozzle comprising:
- a hollow body member having a side wall, a closed lower end, and an open upper end arranged to be connected with a decoking system, said body member having flow ports extending through said side wall, said flow ports including a pair of upper ports diametrically opposed and four lower ports located about ninety degrees apart around the circumference of said body;
upper nozzle means connected to said side wall for fluid communication with said upper ports;
lower nozzle means connected to said side wall for fluid communication with said lower ports;
valve means slidingly disposed in the interior of said hollow body member, said valve means including seal means sealingly engaging said side wall;
valve control means for moving said valve means between a first position permitting flow through said lower nozzle means while preventing flow through said upper nozzle means and a second position preventing flow through said lower nozzle means while permitting flow through said upper nozzle means; and
,said valve means also including a hollow valve member having a pair of upper apertures, which in the second position of said valve means are in communication with said upper ports, and four lower apertures, which in the first position of said valve means are in communication with said lower ports.
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Abstract
The improved decoking nozzle assembly described hereinafter includes both first and second stage decoking nozzles that can be selectively utilized. The nozzle assembly includes a hollow body having ports therein providing fluid flow to the first and second stage nozzles, a sliding valve mechanism inside the hollow body that includes apertures arranged to be selectively aligned with the ports and with the first or second stage nozzles, and a stop member that is engageable with the valve member to retain the valve member in the selected position.
56 Citations
6 Claims
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1. An improved decoking nozzle comprising:
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a hollow body member having a side wall, a closed lower end, and an open upper end arranged to be connected with a decoking system, said body member having flow ports extending through said side wall, said flow ports including a pair of upper ports diametrically opposed and four lower ports located about ninety degrees apart around the circumference of said body; upper nozzle means connected to said side wall for fluid communication with said upper ports; lower nozzle means connected to said side wall for fluid communication with said lower ports; valve means slidingly disposed in the interior of said hollow body member, said valve means including seal means sealingly engaging said side wall; valve control means for moving said valve means between a first position permitting flow through said lower nozzle means while preventing flow through said upper nozzle means and a second position preventing flow through said lower nozzle means while permitting flow through said upper nozzle means; and
,said valve means also including a hollow valve member having a pair of upper apertures, which in the second position of said valve means are in communication with said upper ports, and four lower apertures, which in the first position of said valve means are in communication with said lower ports. - View Dependent Claims (2, 3, 4)
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5. An improved decoking nozzle comprising:
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a hollow body member having a side wall, a closed lower end, and an open upper end arranged to be connected with a decoking system, said body member having spaced upper and lower flow ports extending through said side wall; upper nozzle means connected to said side wall for fluid communication with said upper port; lower nozzle means connected to said side wall for fluid communication with said lower port; valve means including a hollow valve member slidingly disposed in the interior of said hollow body member, said valve member having a closed lower end and upper and lower apertures arranged to be alternately in fluid communication with a respective one of said upper and lower ports, said valve means including seal means sealingly engaging said side wall and isolating said upper and lower apertures; and
,valve control means for moving said valve member between a first position wherein said lower port and apertures are in communication permitting flow through said lower nozzle means and a second position wherein said upper ports and apertures are in communication permitting flow through said upper nozzle means, said control means including a chamber defined by said side wall and the lower ends of said valve member and body member, means permitting the introduction of pressure into said chamber to urge said valve member toward said first position, resilient means urging said valve member toward said second position, and stop means for selectively retaining said valve member in said first position. - View Dependent Claims (6)
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Specification