Heat Recovery from Reformer Flue GasCosts & Benefits
|Parent Process: Steam Reforming|
|Energy Savings Potential||
Reducing the stack temperature by 100˚C will result in energy savings of approximately 0.4 GJ/ t NH3 (Christensen, 2001).
By installing a feed pre-heat coil in the low temperature convection section of the reformer flue gas duct, a plant in India was able to reduce flue gas temperature of the reformer from 170˚C to 148˚C and eliminated the need for a fired heater, resulting in energy savings of 0.17 GJ/t NH3 (Nand and Goswami, 2009).
Another Indian installed a natural gas heating coil to recover the heat from the reformer flue gas. The reformer flue gas temperature was reduced from 190˚C to 160˚C, saving 0.18 GJ/t NH3 (Nand and Goswami, 2009).
At an ammonia plant in Pakistan, a demineralized water preheating coil was installed to recover heat from the flue gas (240˚C). The temperature of the flue gas was lowered to 137˚C, recovering approximately 44 GJ/hour of waste heat from the flue gases (Yousaf, 2011)
|CO2 Emission Reduction Potential|