Improvements in the performance of a medium-pressure-boiler through the adjustment of inlet fuels in a refinery plant

Lee, Chien Li; Jou, Chih-Ju G.; Tsai, Chao-Ming; Wang, H. Paul

doi:10.1016/j.fuel.2006.09.001

Cited by 11 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The scheduling of a fuel gas network represents a challenge for a refinery due to both its multiple sources and its variable composition [21,22], as well as its variable production and demand [23,24]. The flexibility to switch between various types of fuel consumed seems to be an attractive economic route to deal with this challenge [25,26]. As discussed below in more detail, this flexibility may include natural gas or hydrogen-rich gases [26,27], and can be exploited on a national or a global level [28].…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Techno-Economic and Environmental Aspects of Process Heat Source Change in a Refinery

et al. 2019

View full text Add to dashboard Cite

This study of process heat source change in industrial conditions has been developed to aid engineers and energy managers with working towards sustainable production. It allows for an objective assessment from energetic, environmental, and economic points of view, thereby filling the gap in the systematic approach to this problem. This novel site-wide approach substantially broadens the traditional approach, which is based mostly on “cheaper” and “cleaner” process heat sources’ application and only takes into account local changes, while neglecting the synergic effect on the whole facility’s operations. The mathematical model employed assesses the performance change of all the affected refinery parts. The four proposed aromatic splitting process layouts, serving as a case study, indicate feasible heat and condensate conservation possibilities. Although the estimated investment needed for the most viable layout is over €4.5 million, its implementation could generate benefits of €0.5–1.5 million/year, depending on the fuel and energy prices as well as on the carbon dioxide emissions cost. Its economics is most sensitive to the steam to refinery fuel gas cost ratio, as a 10% change alters the resulting benefit by more than €0.5 million. The pollutant emissions generated in the external power production process contribute significantly to the total emissions balance.

show abstract

Section: Introductionmentioning

confidence: 99%

An Investigation of the Techno-Economic and Environmental Aspects of Process Heat Source Change in a Refinery

et al. 2019

View full text Add to dashboard Cite

show abstract

“…As a consequence, more heat is absorbed by the boiler in the radiation zone, and thus, the temperature in the convection heating surface zone is lowered and the boiler efficiency is improved. The excess air ratio is a control operating variable affecting the thermal efficiency, reliability, and ecological characteristics of (or emissions from) a boiler unit simultaneously. , Therefore, when increasing the RG ratio in fuel gas and decreasing the residual O 2 concentration in excess air at the same time, the formation of NO x is reduced significantly and furthermore the boiler efficiency is improved (less fuel is required).…”

Section: Resultsmentioning

confidence: 99%

“…The authors previously studied the possibility of replacing natural gas (NG) and partial fuel oil (FO) with the hydrogen-rich fuel gas (RG) for the medium-pressure boiler under the fixed boiler loading (boiler loading 88–92 ton/h) and reducing the excess air ratio (boiler loading 70–72 ton/h) . The results showed that the fuel cost could be decreased by $1.03 million USD/y.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Energy Cost and CO₂ Emission for the Boilers in a Full-Scale Refinery Plant by Adding Waste Hydrogen-Rich Fuel Gas

et al. 2007

Self Cite

View full text Add to dashboard Cite

The use of hydrogen-containing fuel in gas turbines and industrial burners can benefit both losses of radiative heat and emission of pollutants. In this study, worthless waste hydrogen-rich fuel gas (RG) was led into a high-pressure boiler or a medium-pressure boiler in the fuel system to partially replace fuel oil (FO) and/or natural gas (NG) in a full-scale petrochemistry plant. Two sets of inlet fuel flow rate ratios were examined to evaluate the reductions of boiler energy consumption and CO2 emission. The result showed that for the high-pressure boiler at a loading of 75%, the usage of NG can be 13 × 106 m3/y less and the CO2 emission can be 2.2 × 104 tons/y lower by changing the inlet FO:NG:RG ratio from 1:1:0 to 1:0.65:0.35. Meanwhile, for the medium-pressure boiler at a loading of 70%, the usage of NG can be cut by 8 × 106 m3/y and the CO2 emission can be 3.0 × 104 tons/y lower by changing the inlet FO:RG ratio from 1:0.2 to 1:0.7. Therefore, the addition of RG has practical benefits on both energy saving and the reduction of greenhouse gas emission.

show abstract

“…For example, Lee and Jou used the heat recovered from the flue gas to raise temperature of the pre-heated air for reducing the thermal loss and raising the furnace efficiency to save fuel consumption (Lee & Jou, 2011). Lee and Jou reduced the oxygen concentration in the flue excess air for raising the thermal efficiency of boiler and furnace to reduce fuel consumption and carbon dioxide emission (Lee & Jou, 2012); Lee, Jou, Tsai and Wang (2007) ;Jou et al (2010) applied the recovered tail gas from petrochemical processes as an alternative fuel to replace natural gas and diesel fuel to power a full-size furnace as well as a steam-gas cogeneration high-pressure boiler and furnace, the results show that using the recovered tail gas has the potential of saving fuel cost and reducing carbon dioxide emission.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Furnace Thermal Efficiency by Adjusting Fuel Temperature

Lee¹,

Jou²

2013

EER

Self Cite

View full text Add to dashboard Cite

Increasing fuel temperature leads to lower fuel density so that speed of the fuel leaving the nozzle increases causing the fuel to reach the burning point sooner. Hence, a higher temperature can be maintained in the furnace to reduce heat loss. Increasing the fuel temperature also causes higher temperature of the hot gas surrounding the burner nozzle, faster flowing velocity for the hot gas flow in the furnace, more even thermal distribution in the furnace, as well as faster thermal flow rising velocity and higher temperature in the furnace radiation zone. Hence, the fuel consumption and carbon dioxide emission are significantly reduced. In this study, results obtained with a full-scale furnace show that when the fuel temperature is raised from 95 o C to 130 o C, the hot gas temperature in the convective zone of the furnace rises by 21 o C; the furnace pressure increases by 2.5 mm H 2 O so that oxygen concentration in the excess air drops by 1.2 vol %. Under these conditions, 7.5 x 10 5 m 3 of fuel cost can be saved, and 858 ton per year of CO 2 emission can be reduced.

show abstract

Improvements in the performance of a medium-pressure-boiler through the adjustment of inlet fuels in a refinery plant

Cited by 11 publications

References 18 publications

An Investigation of the Techno-Economic and Environmental Aspects of Process Heat Source Change in a Refinery

An Investigation of the Techno-Economic and Environmental Aspects of Process Heat Source Change in a Refinery

Reduction of Energy Cost and CO₂ Emission for the Boilers in a Full-Scale Refinery Plant by Adding Waste Hydrogen-Rich Fuel Gas

Enhancing Furnace Thermal Efficiency by Adjusting Fuel Temperature

Contact Info

Product

Resources

About

Improvements in the performance of a medium-pressure-boiler through the adjustment of inlet fuels in a refinery plant

Cited by 11 publications

References 18 publications

An Investigation of the Techno-Economic and Environmental Aspects of Process Heat Source Change in a Refinery

An Investigation of the Techno-Economic and Environmental Aspects of Process Heat Source Change in a Refinery

Reduction of Energy Cost and CO2 Emission for the Boilers in a Full-Scale Refinery Plant by Adding Waste Hydrogen-Rich Fuel Gas

Enhancing Furnace Thermal Efficiency by Adjusting Fuel Temperature

Contact Info

Product

Resources

About

Reduction of Energy Cost and CO₂ Emission for the Boilers in a Full-Scale Refinery Plant by Adding Waste Hydrogen-Rich Fuel Gas