Close-coupled transfer line heat exchanger unit

Details Close-coupled transfer line heat exchanger unit Close-coupled transfer line heat exchanger unit

1982-03-18

1984-07-03

Richter, Sheldon J.

Heat exchange

With protector or protective agent

48190, 165174, 165178, 165DIG14, 285155, F28F 900

Patent

active

044573642

ABSTRACT:
In thermal cracking of hydrocarbons, especially steam cracking to light olefins, a transfer line heat exchanger unit is provided in which cracked gas flows from a furnace into heat exchange tubes, which comprises a distributor having an inlet for said gas and two or three diverging branches forming with said distributor a wye or tri-piece for passage of gas, each branch having along its length a substantially uniform cross-sectional area and being in fluid flow communication with a respective cooling tube. Unfired residence time and pressure drop are reduced, thereby improving selectivity to ethylene.

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"Ethylene", Chemical Week, Nov. 13, 1965, pp. 69, 72, 76.
Oil and Gas Journal, Feb. 1, 1971, pp. 70-73.

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