Water quench fitting for pyrolysis furnace effluent

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 to form a mixed vapor-liquid stream;
• means for separating the vapor and liquid;
• means for quenching the separated vapor with a second quench water stream to form an overhead vapor product comprising light hydrocarbons;
• means for collecting the water and liquid hydrocarbons;
• means for separating the oil from the water;
• means for recovering the separated water;
• means for cooling at least a portion of the recovered water;
• and
• means for recycling the cooled water to the first and second quench water streams.

A process for quenching a pyrolysis furnace effluent, comprising:

• quenching a hydrocarbon comprising gas and oil vapor to provide a first liquid phase comprising water and liquid hydrocarbons and a gas phase comprising the oil vapor;
• separating at least a portion of the first liquid phase from the gas phase;
• quenching the separated gas phase to provide a second liquid phase comprising water and liquid hydrocarbons;
• collecting the first and second liquid phases;
• separating at least a portion of the water from the first and second liquid phases;
• cooling at least a portion of the water;
• using at least a portion of the cooled water to quench the hydrocarbon;
• and
• using at least a portion of the cooled water to quench the separated gas phase.