Linear Transfer Line Exchangers (Double-pipe design)

The patented BORSIG linear quencher (BLQ) consists of a number of linearly arranged double pipe elements of which each is directly coupled to one of the furnace radiant coil outlets.

The process effluent from each single radiant coil is quenched individually in its own double pipe element.

A common down comer header distributes uniformly the circulating boiler water coming from the steam drum to each of the “Turbo flow” inlet chambers. A riser header is collecting the steam/water mixture from the upper outlet chambers.

The picture below shows a typical BLQ arrangement. Other arrangements are possible, even the twin leg concept if the  available place in the furnace structure is limited.

The BLQ is a versatile exchanger design with a wide range of optional orientations which fulfills the specific requirements of all engineering contractors active in the design of ethylene furnaces.