May 2019

Heat Transfer

Optimize transient plant operations with castable-free fired heater

Fired heaters are designed with castable refractory in various sections of the heater.

Fired heaters are designed with castable refractory in various sections of the heater. A fired heater with castable refractory requires refractory dry-out during startup. This dry-out process results in a very long startup time. In a typical liquefied natural gas (LNG) plant, waste heat recovery units (WHRUs) are installed at gas turbine exhausts to recover the residual heat from flue gases. Fired heaters are used in combination with WHRUs to provide/meet heating requirements during transient operation and/or supplemental heating. The operation of fired heaters becomes critical when WHRUs cannot provide energy requirements during transient operation, e.g., the startup of plant or process un

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