초록

A floating recycle pan is provided to control the flow of the feed into and out of the downcomer even while the oil liquid level in the ebullated bed reactor is varied to provide continuous ebullation and enhance the efficiency and yield of the process.

대표청구항 ▼

An ebullated bed reactor, comprising: a substantially enclosed vessel having a lower portion and an upper portion for processing oil; oil feed means connected to said vessel for feeding an oil feed comprising oil and hydrogen-rich gases into said lower portion of said vessel; fresh catalyst feed mea

An ebullated bed reactor, comprising: a substantially enclosed vessel having a lower portion and an upper portion for processing oil; oil feed means connected to said vessel for feeding an oil feed comprising oil and hydrogen-rich gases into said lower portion of said vessel; fresh catalyst feed means connected to said vessel for feeding fresh hydrotreating catalyst into said vessel; ebullating pump means located in the lower portion of said vessel for circulating said oil feed in said vessel in the presence of said catalyst to hydrotreat said oil; a tubular downcomer extending generally upward above said pump means, said downcomer having an upper end and, a lower end in proximity to said pump means, and an inner surface and an outer surface; and a floating tubular recycle pan slidably connected to said upper end of said downcomer in said upper portion of said vessel for facilitating flow of said oil feed into said downcomer, said floating tubular pan having a substantially circular upright wall with a top portion and a bottom portion, said pan having an annular inwardly sloping frustoconical flared wall extending downwardly at an angle of inclination from said bottom portion of said upright wall, said sloping wall having a bottom with a shoulder, said floating tubular pan having an inner annular neck extending substantially downwardly from said shoulder for slidably engaging said inner surface of said downcomer and an outer sleeve extending substantially downwardly from said shoulder for slidably engaging said outer surface of said downcomer, and said outer sleeve being spaced from said inner neck and cooperating with said shoulder to define a pocket therebetween comprising an annular compartment for slidably receiving the upper end of said downcomer.