Abstract: The invention relates to a process for producing olefins from a feed stream containing hydrocarbons by pyrolytic cracking of the hydrocarbons in a cracker furnace, said process comprising: pre-heating the feed stream outside the cracker furnace; feeding the pre-heated feed stream to a tube in the convection section of the cracker furnace; further pre-heating the feed stream in the convection section; feeding the further pre-heated feed stream to a tube in the radiant section of the cracker furnace; pre-heating an oxygen containing stream; contacting the pre-heated oxygen containing stream with a fuel gas in a burner in the radiant section; and pyrolytic cracking the feed stream in the radiant section resulting in an effluent containing olefins.

Abstract: Methods and systems for steam production are provided. Methods include providing feedwater having an electrical conductivity of less than 200 ?S/cm to an electrode boiler, and converting the feedwater to saturated steam by the electrode boiler. The saturated steam is provided as a first fluid to a heat exchange component. Water having an electrical conductivity of more than 200 ?S/cm is provided to the heat exchange component as a second fluid, where the second fluid is heated through indirect thermal transfer with the saturated steam to generate wet steam. The saturated steam is at least partially condensed in the heat exchange component through the indirect thermal transfer with the second fluid. At least a portion of the thus obtained condensed fluid is fed back to the electrode boiler for use as part of the low-conductivity water to generate said saturated steam.

Abstract: The present invention relates to a system for treating and cooling a hydrocarbon stream, comprising—a gas treatment stage comprising a pre-cooler to cool at least part of the hydrocarbon feed against cooling water, —a first cooling stage comprising one or more first water coolers, —a second cooling stage comprising one or more second water coolers. The system comprises a cooling water unit arranged to receive a stream of cooling water and supply a first part of the stream of cooling water to a chilling unit to obtain a stream of chilled cooling water and pass the stream of chilled cooling water to a selection of the at least one pre-cooler, the one or more first water coolers and the one or more second water coolers.

Abstract: The present invention relates to a system for treating and cooling a hydrocarbon stream, comprising a gas treatment stage comprising a pre-cooler to cool at least part of the hydrocarbon feed against cooling water, a first cooling stage comprising one or more first water coolers, a second cooling stage comprising one or more second water coolers. The system comprises a cooling water unit arranged to receive a stream of cooling water and supply a first part of the stream of cooling water to a chilling unit to obtain a stream of chilled cooling water and pass the stream of chilled cooling water to a selection of the at least one pre-cooler, the one or more first water coolers and the one or more second water coolers.