Method and means for recovering heat in the pyrolysis of 1,2-dic

Details Method and means for recovering heat in the pyrolysis of 1,2-dic Method and means for recovering heat in the pyrolysis of 1,2-dic

1997-11-12

1999-10-26

Tran, Hien

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including heat exchanger for reaction chamber or reactants...

422203, 422204, F28D 708, C07C 2106

Patent

active

059723009

ABSTRACT:
A process for the pyrolysis of 1,2-dichloroethane (EDC) in a pyrolysis furnace (1) involves feeding liquid EDC into a convection heat transfer tube (2) for preheating, channeling an intermediate flow of preheated EDC into a radiation heat transfer tube (3) for further heating, thereby pyrolyzing a part of EDC into vinyl chloride monomer, and discharging a decomposition gas flow from the pyrolysis furnace. Potential heat is recovered from the decomposition gas by using a double tube type heat exchanger (10) consisting of outer and inner tubes, that is, by channeling the intermediate flow through the outer tube (11), channeling the decomposition gas through the inner tube (15) for heat exchange between the intermediate flow and the decomposition gas, and feeding the heat acquired intermediate flow into the radiation heat transfer tube (3).

REFERENCES:
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patent: 4590318 (1986-05-01), Longhini
patent: 4665243 (1987-05-01), Burks
patent: 4720599 (1988-01-01), Hebgen et al.
patent: 4746759 (1988-05-01), Dummer et al.
patent: 5188739 (1993-02-01), Khan et al.

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