The reasons for using a furnace for heating the primary feedstock and excess number of condensers on existing type 21-10/300 delayed coking plants (DCP) tire revealed. A variant of operation of the type 21-10/600 DCP using a heat-exchange system is proposed. It was shown. that if heat-exchange equipment of the optimum type-sizes is used, it is no longer necessary to use a furnace for heating the primary feedstock and the number of terminal condensers can be reduced. All of this allows reducing fuel consumption, stack gas emissions, and consumption of coolant in the condensers.