Apparatus for recovery of flared condensible vapors
AssigneeJohn Zink Company
InventorRobert D. Reed
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Abstract
An apparatus for recovery of condensible vapors as components in waste gases which are to be flared, comprising a flare system, including a flare gas line leading to a flare stack. Inserted in the flare gas line is a gas-to-liquid heat exchanger, to cool the flare gases prior to passage to the stack. The cooling is to be selected temperature, where condensible vapors in the waste gases, the dew points of which are above the selected temperature, will condense. Means are provided for separating the condensed vapors from the remaining flare gases. Thermostatic means are provided for stopping the circulation of said cooling liquid whenever the ambient temperature drops below the selected temperature.
Claims6
Apparatus for recovery of condensible vapors in waste gases which are to be flared, comprising;
- (a) a flare system including a flare gas line leading to a flare stack;
- (b) a horizontal gas-to-cooling liquid heat exchanger inserted into such flare gas line to cool said flare gases prior to passage to the stack for burning, to a selected temperature, the exchanger having a gas inlet plenum at one end and an outlet plenum at the other end;
- (c) means to cool and circulate the cooling liquid through said heat exchanger;
- whereby flare vapors, the dew points of which are above said selected temperature, will condense;
- and
- (d) means at the outlet end to separate the condensed vapors from the remaining flare gases;
- the improvement characterized by at least one tube positioned along the bottom of the heat exchanger to carry precondensed vapors in the waste gas directly from the inlet to the outlet plenum.
Dependencies are inferred from the claim text.