A radiative recuperator preheats oxidant and/or fuel for combustion at one or more burners of a furnace. The recuperator includes a duct, at least portions of which comprise a material having a thermal conductivity of greater than 1 W/(m.Math.K), preferably greater than 3 W/(m.Math.K), that receives hot flue gas produced by the burner(s). The duct radiatively transfers heat to oxidant or fuel (for preheating) flowing through one or more metallic pipes disposed in between the duct and an insulating wall.

A thermochemical regenerator system is operated without encountering accumulation of unwanted solids on the interior surfaces of the passages through which flue gas passes.

The invention relates to a unit and method for melting in a furnace comprising a combustion-heated melting chamber, in which the air is heated by means of heat exchange with the fumes generated by combustion. The heated air is used in a gas turbine in order to generate electrical and/or mechanical energy. In addition, the effluent from the gas turbine is used to pre-heat the combustion oxygen and/or gaseous fuel upstream of the melting chamber.

A zero-power-consumption self-adaptive distributed waste heat recovery and utilization system for an ethylene device is provided. The waste heat recovery and utilization system includes a waste heat collection pipeline system, multiple waste heat recovery devices arranged in groups, and a waste heat return pipeline system. The waste heat collection pipeline system is configured to lead out a working medium having waste heat from a waste heat source of the ethylene device and distribute the working medium to the waste heat recovery devices. The waste heat recovery devices are configured to heat combustion-supporting air of a bottom burner of an ethylene cracking furnace through the waste heat. The waste heat return pipeline system is configured to transport the working medium that has undergone waste heat recovery and utilization back to the waste heat source.

The present invention relates to an iron fuel boiler process for iron fuel combustion, comprising the steps of combusting an iron fuel suspension medium comprising iron fuel and oxygen in an iron fuel burner arrangement to obtain an iron oxide containing medium; receiving the iron oxide containing medium into an iron fuel boiler arrangement for transferring the iron oxide containing medium towards a separation unit disposed at the end of said iron fuel boiler arrangement; exchanging heat between the iron oxide containing medium and a boiler of the iron fuel boiler arrangement with a heat-exchange medium during the transfer of the iron oxide containing medium through said iron fuel boiler arrangement; and separating iron oxide from the oxide containing medium to obtain solid iron oxide particles and a gas flow. The process further comprising the step of cooling said iron oxide containing medium with a cooling medium during said transfer of the iron oxide containing medium through the iron fuel boiler arrangement such that a temperature of the iron oxide is achieved of below the sintering temperature of the particles at said separation unit.

The present invention relates to a boiler with a packaged heat exchanger in which a heating passage and a cooling passage are packaged to generate superheated steam through heat exchange by exhaust gas and to adjust the temperature of the superheated steam to a suitable level for the use through heat exchange with air.

A process including preheating a hydrocarbon feed, feeding the preheated hydrocarbon stream to a second preheat zone for cracking, and feeding the cracking feed stream to one or more coils in a radiant section to recover a cracked hydrocarbon product. The process includes injecting excess air and cooling the cracked hydrocarbon product in a transfer line exchanger. The system includes a pyrolysis heater, a first and second preheat zone of the convection heating zone, and one or more coils in the radiant heating zone. The system includes one or more inlets for injecting an amount of excess air, one or more electrical heating elements in the radiant heating zone, and a feedline for directing the cracked hydrocarbon product to a transfer line exchanger.