Quench exchanger

Details Quench exchanger Quench exchanger

1996-11-04

1997-11-25

Leo, Leonard R.

Heat exchange

With protector or protective agent

165135, 165154, F28F 1900

Patent

active

056901682

ABSTRACT:
A thermal transition section for introducing a high temperature cracked process gas into a quench exchanger having an inlet end comprising inner and outer concentric pipes connected to a closure ring to define an annulus between the pipes and an interior exchanger surface having an inside diameter. The transition section has a metal outer wall extending from a downstream end connected to the closure ring to an upstream end connected to a metal transition cone. The transition cone is connected at an upstream end to a line for supplying the process gas. The downstream end of the inner sleeve has an outside diameter matching the inside diameter of the interior exchanger surface. A precast, pre-fired single-piece ceramic insert substantially fills the annulus between the outer wall and inner sleeve. By using the ceramic insert, particularly a relatively long insert, thermal stresses are reduced and coke formation in the annulus is inhibited.

REFERENCES:
patent: 2498924 (1950-02-01), Keller
patent: 4457364 (1984-07-01), Dinicolantonio et al.
patent: 5350011 (1994-09-01), Sylvester
patent: 5579831 (1996-12-01), Brucher
Babcock-Borsig "Borsig Linear Quencher (BLQ)--Turboflow", pp. 1-8, 1995.

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