The prospects of burning coal and oil processing waste in slurry, gel, and solid state

Vershinina, K. Yu.; Nyashina, Galina S.; Dorokhov, V.V.; Shlegel, N.E.

doi:10.1016/j.applthermaleng.2019.04.035

Cited by 19 publications

(4 citation statements)

References 44 publications

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“…One of the reasons explaining this lack of optimization is the fact that most oven configurations do not yet have good mathematical models based on heat exchanges. This has been a special problem for researchers interested by the optimization of bread ovens since there are impacts on the environment, society and economy ( Vershinina et al., 2019 ). In particular, wood and charcoal obtained from natural forest resources are the main energy sources in several developing countries ( Sagouong and Tchuen, 2018a , Sagouong and Tchuen, 2018b ).…”

Section: Introductionmentioning

confidence: 99%

Modeling, simulation and optimization of solid fuel bread ovens commonly used in developing countries

Hatou

Tchuen

Woafo

2021

Heliyon

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In this work, we propose a mathematical model describing thermal behavior and heating process optimization of solid fuel bread ovens. Numerical simulation leads to temperature profiles of the oven. The design and implementation of an operating prototype permits us to obtain, with type K thermocouples, experimental temperature profiles in some points of the oven. There is a good agreement between the experimental results and those obtained from the numerical simulation of the proposed model. A permanent temperature value of 220 °C is reached in the baking chamber. It is obtained that the energy efficiency of the oven is 49%. Making use of the objective gain function, it is found that the optimal parameters of the oven are the following: 50 W as optimum operating value of the electric power of the blower, 3 m 2 as the optimum operating value of the total surface of the baking chamber; and 0.67 as the optimum operating value of the filling factor between the heating chamber and the baking chamber. The developed model serves to better understand the operation, the optimization and to rationally manage energy expenditure related to solid fuel bread ovens in developing countries.

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Section: Introductionmentioning

confidence: 99%

Modeling, simulation and optimization of solid fuel bread ovens commonly used in developing countries

Hatou

Tchuen

Woafo

2021

Heliyon

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“…The rheological characteristics of dispersions and suspension fuel condition indices were tested, taking into consideration the influences of concentration, moisture content, ash content, particle size, apparent density, and the solid phase preparation process. The combustion of the mixture of filter cake of non-baking coal and waste oils in different states namely slurry, gel, and solid states was experimentally investigated [10]. A comparative analysis of the different mixtures was produced in terms of ignition delay times, minimum ignition temperatures, the heat of combustion, anthropogenic emissions concentration, and the relative efficiency of fuels.…”

Section: Introductionmentioning

confidence: 99%

The Combustion of a Diesel Oil-Based/Coal/Water Slurry in a Horizontal Cylindrical Furnace: An Experimental Investigation

Salama¹,

ELSihy²,

Moneib³

et al. 2021

Proceedings of International Exchange and Innovation Conference on Engineering &Amp; Sciences (IEICES)

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The current work investigates the use of a coal/oil/water slurry as an alternative fuel in boilers and industrial furnaces. Experiments were carried out on chosen flames with constant input heat throughput and variable air/fuel ratios for three major oil/coal/water mixtures (on a mass basis) as follows: (Case1: pure oil; reference case), (Case2: 80%, 10 %, 10 %) and (Case3: 70%, 15%, 15%). The results showed that case 2 had a significant improvement in both heat transfer to the cooling jacket and combustion efficiency, which was accompanied by a decrease in NOx emissions. Further increase in the ratio of coal and water in the fuel mixture (case 3) produced a significant degradation in the overall combustion characteristics, referring to an upper limit of coal and water loading ratios of only 10%. Oil-coal-water slurries are considered a significant alternative source of energy.

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“…The main reason for the high CO 2 emissions is the excessive use of fossil fuels in power plants, prosumer boilers, and transportation [3,5,6]. Hence, the introduction of alternative renewable fuels, such as solid organic waste (e.g., agri-food and municipal) is mainly driven by the needs of replacing the dominant types of fossil fuels (e.g., coal, fuel oil, and natural gas), along with the disposal of post-production waste [7].…”

Section: Introductionmentioning

confidence: 99%

The Utilization of Plum Stones for Pellet Production and Investigation of Post-Combustion Flue Gas Emissions

et al. 2020

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Agri-food waste is generated at various food cycle stages and is considered to be a valuable feedstock in energy systems and chemical syntheses. This research identifies the potential and suitability of a representative agri-food waste sample (i.e., plum stones) as a solid fuel. Ground plum stones containing 10, 15, and 20 wt.% of rye bran were subjected to pelletization. The pelletizer was operated at 170, 220, and 270 rpm, and its power demand for the mixture containing 20 wt.% of rye bran was 1.81, 1.89, and 2.21 kW, respectively. Such pellets had the highest quality in terms of their density (814.6 kg·m−3), kinetic durability (87.8%), lower heating value (20.04 MJ·kg−1), and elemental composition (C: 54.1 wt.%; H: 6.4 wt.%; N: 0.73 wt.%; S: 0.103 wt.%; Cl: 0.002 wt.%; O: 38.2 wt.%). Whole plum stones and pellets were subjected to combustion in a 25 kW retort grate boiler in order to determine the changes in the concentrations of NO, SO2, CO, CO2, HCl, and O2 in the post-combustion flue gas. Collected results indicate that plum stone–rye bran pellets can serve as effective substitutes for wood pellets in prosumer installations, meeting the Ecodesign Directive requirements for CO and NO.

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The prospects of burning coal and oil processing waste in slurry, gel, and solid state

Cited by 19 publications

References 44 publications

Modeling, simulation and optimization of solid fuel bread ovens commonly used in developing countries

Modeling, simulation and optimization of solid fuel bread ovens commonly used in developing countries

The Combustion of a Diesel Oil-Based/Coal/Water Slurry in a Horizontal Cylindrical Furnace: An Experimental Investigation

The Utilization of Plum Stones for Pellet Production and Investigation of Post-Combustion Flue Gas Emissions

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