LOW GRADE FUEL OIL SHALE AND BIOMASS CO-COMBUSTION IN CFB BOILER

Oil Shale ◽  
2013 ◽  
Vol 30 (2S) ◽  
pp. 294 ◽  
Author(s):  
A KONIST ◽  
T PIHU ◽  
D NESHUMAYEV ◽  
I KÜLAOTS
Keyword(s):  
Fuel Oil ◽  
2020 ◽  
Author(s):  
Marina Mozhayskaya ◽  
Galina Pevneva ◽  
Vladimir Surkov
Keyword(s):  

Author(s):  
Marina V. Mozhayskaya ◽  
Galina S. Pevneva ◽  
Vladimir G. Surkov

The study cracking of a mixture of mechanically activated oil shale (MO OSh) and fuel oil, a mixture of demineralized MO GS and fuel oil has been investigated. The data on the composition of liquid products showed that after the removal of mineral components, oil shale is more easily destroyed due to the release of kerogen. It is shown that in the obtained liquid products of the cracking of the mixture of fuel oil – demineralized MO OSh, the proportion of oils increases to 74.6 % wt. In the composition of gaseous products of cracking, the amount of hydrogen, methane and ethane is noticeably reduced. According to the data on the fractional composition of liquid products, it was found that during the cracking of mixtures of fuel oil and MO HS, after the removal of carbonates and silicates, the proportion of gasoline and diesel fractions inc


2016 ◽  
Vol 2 (8) ◽  
pp. 1-14
Author(s):  
Jūratė Kuklytė

Relevance of the research.Due to the effect of globalization and integration processes, it is impossible to imagine a world without oil, as the oil price changes affect not only the financial markets but also international trade circulation (Babatunde et al., 2013; Bastiani et al.,2016.; Caporale, et al.,2016.; Humphrey et al.,2016). Oil demand is growing rapidly. It is necessary for mineral-based fuels, lubricants, plastics and various products of the chemical industry and other uses. High consumer demandled to synthetic oil production, known as non-traditional oil production methods (Grushevenko, E., Grushevenko, D., 2012a). Unconventional oil is a synthetic energy product designed to convert one fuel source (fuel oil, shale, sandresin) to another, but it requires a tremendous amount of heat and fresh water, however, synthetic oil is much cheaper to extract than conventional oil from deep sources in the context of limited resources.Further increasing investor interest in oil production from unconventional reserves (oil, shale, sand) for a much lower production costs and cost dynamics and higher return on investment projects in return has been reported occasionally. Since the period of 2006–2011 break even price of oil, extracted from the shale has changed, the cost has doubled –from 105 US dollars/barrel to 48 US dollars/barrel. During the same period, the cost-effectiveness of oil extracted from tar sand deposits price increased by 20% and accounted for around 73 US dollars/barrel. Based on the present state of international trade realities and trends it can be suggested that fluctuations in oil prices is becoming a major factor in rising geopolitical tensions and fears of financial market turmoil.


2021 ◽  
Vol 266 ◽  
pp. 02004
Author(s):  
I.V. Litin ◽  
M.Yu. Nazarenko ◽  
S.N. Saltykova

Recently, there has been a growing global interest in processing low-grade types of solid fuels, such as oil shale. In the near future, the role of solid fuels in the country's fuel and energy balance is expected to increase, primarily due to their large reserves. Based on this, this work evaluates the semi – coke obtained by semi-coking low-grade types of solid combustible fossils-oil shale of the Baltic basin (Leningrad deposit). The influence of process parameters (temperature and holding time) on the physical and chemical properties of shale semi-coke was studied experimentally. Based on the data obtained, it is concluded that the obtained samples of semi-coke from oil shale and brown coal can be used as a substitute for coke in various industries and the national economy.


Author(s):  
Antonio Diego-Marin ◽  
Carlos Melendez-Cervantes ◽  
Alejandro Mani-Gonzalez

Two older boilers were burning low grade heavy fuel oil (number 6) and emitting large amounts of unburned carbon particles. Owing to the short life remaining of the units and economic constrains, it was not possible to change to a better fuel or install new burners. To contribute to the solution of this problem, an experimental program was carried out by emulsifying water in the fuel oil. Tests were performed in a scale furnace (0.35MWth) and the emulsions that produced the best results were assessed in the two boilers, 28 and 34 MWe capacity with Y-jet atomizer type. The system to prepare the emulsion was very simple: water was added into the oil before the fuel oil pump, no chemical products were added and a static mixed was used to improve the water size distribution, which 90% ranged from 1 to 9 micron. In the pilot furnace the emulsions were prepared with 5 and 10% water and atomized with compressed air. Particle reductions of 43 and 67% were obtained compared with the net heavy fuel oil. In the boilers, the emulsions were prepared with the same amount of water, and were atomized with saturated steam. In the 28 MWe boiler, a similar particle reduction was obtained to that of the scale furnace. However, in the 34 MWe boiler there was no particle abatement. By using a commercial fluid dynamic computer code, it was found that the combustion air transferred heat to the steam raising its temperature. Thus, in the mixing chamber of the Y-jet atomizers, the steam was superheated and destroyed the water droplets of the emulsion. Compressed air and saturated steam as atomizing medium of the emulsions had similar effect on the unburned particle reduction. However, the effectiveness of the emulsions may be affected by the steam. Care should be taken to avoid the use of steam with a temperature higher than the saturated water temperature.


1985 ◽  
Vol 22 (02) ◽  
pp. 179-187
Author(s):  
S. K. Gupta

All major low-speed and many medium-speed engines now have the capability of operating and maneuvering on low-grade fuel oil (Bunker C). Low-grade fuel engines have recently been appearing in U.S.-flag ships. The economic reasons which influence owners to order these engines are surveyed here. The increased price of diesel oil and the improved efficiency of low-grade fuel engines have been major factors for their implementation. Improved equipment design for reliability and maintainability has decreased downtime due to repairs. Many ships operate auxiliary engines on low-grade fuel. Maritime schools have followed this trend by adding or expanding diesel courses to provide hands-on training and advanced techniques such as engine room simulators to teach problem handling. The low-grade fuel engine, with its superior fuel efficiency, is expected to become the dominant propulsion mode in U.S. merchant ships, as it already is in the rest of the world.


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