TY - JOUR
T1 - Improvements in the performance of a medium-pressure-boiler through the adjustment of inlet fuels in a refinery plant
AU - Lee, Chien li
AU - Jou, Chih Ju G.
AU - Tsai, Cheng Hsien
AU - Wang, H. Paul
N1 - Funding Information:
The authors are grateful for the support from the National Science Council of Taiwan under Grant NSC93-ET-7-327-001-ET, and to Talin Refinery of CPC for providing the experimental apparatus.
PY - 2007/3
Y1 - 2007/3
N2 - Hydrogen has been considered as a promising alternative for fossil fuel in recent years because it is very "clean". Fossil fuel generates CO2, CO, SOx, unburned hydrocarbon and particles during combustion, while hydrogen only yields NOx. In this study, a medium-pressure boiler with 130 ton/h boiler loading in a full-scale plant was studied with two inlet hydrogen-rich refinery gas (RG)/fuel oil (FO) volumetric flow rate ratios (inlet RG/FO ratio) and two residual O2 concentration (vol.%) in flue gases (2%, 4%) to evaluate their influence on the emissions of NOx and CO2, flue gas temperatures and boiler efficiencies. The result shows significant improvements in both boiler efficiencies and emissions of air pollutants. By increasing the inlet RG/FO ratio from 1:5 to 1:1.5, the fuel cost was reduced by 11%, NOx emission down by 12%, and the CO2 emission 20,200 ton lower per year was achieved. Thus, better economic operating conditions for the boiler are suggested at inlet RG/FO ratio = 1:1.5 with the residual O2 concentration in flue gases = 2%.
AB - Hydrogen has been considered as a promising alternative for fossil fuel in recent years because it is very "clean". Fossil fuel generates CO2, CO, SOx, unburned hydrocarbon and particles during combustion, while hydrogen only yields NOx. In this study, a medium-pressure boiler with 130 ton/h boiler loading in a full-scale plant was studied with two inlet hydrogen-rich refinery gas (RG)/fuel oil (FO) volumetric flow rate ratios (inlet RG/FO ratio) and two residual O2 concentration (vol.%) in flue gases (2%, 4%) to evaluate their influence on the emissions of NOx and CO2, flue gas temperatures and boiler efficiencies. The result shows significant improvements in both boiler efficiencies and emissions of air pollutants. By increasing the inlet RG/FO ratio from 1:5 to 1:1.5, the fuel cost was reduced by 11%, NOx emission down by 12%, and the CO2 emission 20,200 ton lower per year was achieved. Thus, better economic operating conditions for the boiler are suggested at inlet RG/FO ratio = 1:1.5 with the residual O2 concentration in flue gases = 2%.
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U2 - 10.1016/j.fuel.2006.09.001
DO - 10.1016/j.fuel.2006.09.001
M3 - Review article
AN - SCOPUS:33845624901
SN - 0016-2361
VL - 86
SP - 625
EP - 631
JO - Fuel
JF - Fuel
IS - 5-6
ER -