Water quench fitting for pyrolysis furnace effluent
AssigneeKellogg Brown & Root LLC
InventorVijender Kumar Verma
Life of this patent
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Abstract
Processes to separate a light hydrocarbon stream comprising ethylene, ethane, and C3+ hydrocarbons into an ethylene stream, an ethane stream, and a C3+ hydrocarbon stream, including: feeding the light hydrocarbon stream to a deethanizer; separating the light hydrocarbons in the deethanizer to form a C3+ hydrocarbon bottoms stream and a C2-rich overhead stream comprising ethylene and ethane; separating the C2-rich stream in a C2-rectifier to form a first ethylene stream and an ethane-rich bottoms stream; and separating the ethane-rich bottoms stream in a C2-splitter to form a second ethylene stream and an ethane stream.
Claims20
1) A process for water quenching a pyrolysis furnace effluent, comprising:
- partially quenching a hydrocarbon stream comprising gas and oil vapor with a first quench water stream in a feed line to form a mixed vapor-liquid stream;
- feeding the mixed vapor-liquid stream to a water quench tower to separate the vapor and liquid;
- further quenching the separated vapor with a second quench water stream in the quench tower to form an overhead vapor product comprising light hydrocarbons;
- collecting water and liquid hydrocarbons from the quench tower in an oil-water separator;
- recovering the liquid hydrocarbons from the oil-water separator;
- recovering water from the oil-water separator;
- cooling a portion of the recovered water;
- and
- recycling the cooled water to the first and second water streams.
10) An apparatus for water quenching a pyrolysis furnace effluent, comprising:
- means for partially quenching a hydrocarbon stream comprising gas and oil vapor with a first quench water stream in a feed line to form a mixed vapor-liquid stream;
- means for feeding the mixed vapor-liquid stream to a water quench tower to separate the vapor and liquid;
- means for further quenching the separated vapor with a second quench water stream in the quench tower to form an overhead vapor product comprising light hydrocarbons;
- means for collecting water and liquid hydrocarbons from the quench tower in an oil-water separator;
- means for recovering oil from the oil-water separator;
- means for recovering water from the oil-water separator;
- means for cooling a portion of the recovered water;
- and
- means for recycling the cooled water to the first and second water streams.
11) An apparatus for water quenching a pyrolysis furnace effluent, comprising:
- a water quench fitting in a feed line to a water quench tower for partially quenching a hydrocarbon stream comprising gas and oil vapor with a first quench water stream to form a mixed vapor-liquid stream in the feed line;
- a line to transfer the liquid bottoms product from the quench tower to an oil-water separator;
- a line to recover oil from the oil-water separator;
- a line to recover water from the oil-water separator;
- one or more heat exchangers to cool a portion of the recovered water;
- and
- lines to recycle the cooled water to the first and second water streams.
Dependencies are inferred from the claim text.