Energy Savings and Emission Reduction of Traditional Pollutants, Particulate Matter, and Polycyclic Aromatic Hydrocarbon Using Solvent-Containing Water Emulsified Heavy Fuel Oil in Boilers
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- 作者：Sheng-Lun Lin ; Wen-Jhy Lee ; Shun-Shiang Chang ; Chia-fon Lee ; Lien-Fwu Lee ; Chiao-Shang Lin ; Haiti Loong
- 刊名：Energy & Fuels
- 出版年：2011
- 出版时间：April 21, 2011
- 年：2011
- 卷：25
- 期：4
- 页码：1537-1546
- 全文大小：1040K
- 年卷期：v.25,no.4(April 21, 2011)
- ISSN：1520-5029
文摘
Heavy fuel oil is one of the most commonly used petroleum fuels in boilers, although it is associated with a high level of pollutants. Emulsification is a developing technique to enhance fuel efficiency and reduce regulated pollution emissions. In the current study, the water phase of emulsified heavy oil contained 1 vol % methanol, 4 vol % isopropyl alcohol (IPA), and 95 vol % water, representing actual industrial solvent-containing wastewater (SCW). The SCW fractions in emulsified fuel were optimized by thermal, centrifugal, and 14-day standing stability tests. The emulsion M1P4-10 with 10 vol % SCW showed no separation and contained the smallest and most homogeneous water-in-oil (W/O) droplets after stability tests. Four boilers, including three with 3.6 and one with 10 ton h鈭? steam capacities, were employed to be operated for 30 h with a regular heavy fuel oil and M1P4-10. The microexplosion and tinder effects of solvent contents improved boiler efficiency by 10鈭?3% and reduced fuel consumption by 5鈭?1% using M1P4-10. The emulsion also reduced SOx by 3.3鈭?.1%, particulate matter (PM) by 41鈭?5%, CO by 89鈭?3%, HC by 91鈭?0%, and NOx by 3.3鈭?3%. With regard to inhibiting toxic air pollutants, the emission levels of total polycyclic aromatic hydrocarbons (PAHs) and total benzo[a]pyrene (BaPeq) were reduced by 37.7 and 61.8%, respectively using M1P4-10. The PM and NOx trade-off problem could be solved by lower temperature combustion of M1P4-10. Consequently, the solvent-containing wastewater emulsified heavy fuel oil could effectively promote boiler efficiency and reduce the pollutant emissions in a specific emulsifying ratio.