Advanced Computational Methods in Component-Oriented Modelling of Municipal Solid Waste Incineration Processes (original) (raw)
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Basic Science Modelling and Simulation of Low Calorific Value Municipal Solid Waste Incineration
2012
ENGLISH/ ABSTRACT (ENGLISH/ ABSTRACT (ENGLISH/ ABSTRACT (ENGLISH/ ANGLAIS The paper focused on the mathematical modellin g and simulation of low calorific value municipal solid waste incineration in semiarid region. Municipal solid wastes were collected and analysed; from which wood samples were taken and incinerated using a prototype incinerator. A mathematical model, based on Fourier series (FS) and finite elements method (FEM) was developed, ran and validated using experimental and literature data. Critical minimum volume of 4.93 m 3 or about 6 % of the total volume of the incinerator would be needed at 20% moisture content refuse and a critical maximum volume of 51.10 m 3 or 69.21% of the total volume, would be needed at 50% moisture content. The ignition time and the time at which the combustion becomes self-sustaining are greatly influenced by the moisture content. Critical drying temperature was found to be 711.44 K. The grid size had little or no effect on the simulated resu...
Mathematical Modeling of a Solid Waste Incineration System and Steam Generation
17th Brazilian Congress of Thermal Sciences and Engineering, 2018
Population growth, technological progress and changes in consumption patterns in recent years have led to an increase in the solid waste. On the other hand, limit energy resources and raw materials caused waste to be considered as a waste material and also recyclable at the high level of scientific and applied research. In solid waste management, waste burning is regarded as one of ways for eliminating waste. In this study, municipal waste in one of the districts of Tehran was taken into account for a case study. Also, in special systems which need special care of temperature such as the system for controlling the temperature of the furnace fuel of burnable solid waste in temperature 950°C. Fuel requirements for design were also calculated. At the end of the project, fluent software was used to confirm the findings obtained from the city incinerator furnace design.
Modelling of a Dual Purpose Plant for Waste Incineration
In the present paper, the modelling of a dual-purpose plant for the production of electrical and thermal energy from the heat treatment of wastes is presented. Particularly, the model has been developed with the aim of performing a study about the simulation of a solid waste incineration process, which involves complex gas-solid reactions, in a fluidized bed combustor. The incineration plant is made of three sections, and namely a RDF combustion section, a flue gas treatment section and a thermal recovery section. This paper is mainly focused on the combustion section. Model results have been compared with the experimental data obtained derived from literature, showing a very good agreement. The proposed model may represent a useful and a reliable instrument to be used in both design and planning of new plants and in control and retrofit of existing plants.
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In this study, a Computational Fluid Dynamics (CFD) technique was used to develop a model for the simulation and flow conditions of the incinerator. The CFD technique are based on subdividing the volume of interest, i.e., the combustion chamber (or other parts of the plant) into a grid of elementary volumes. The relevant equations of conservation (mass, momentum, energy) are then applied to each of those elements, after defining all inputs, outputs and boundary conditions. The resulting system is then integrated from start to finish, after introducing momentum, mass and heat transfer. The objective of the study was to evaluate and optimize the performance of locally available incinerators in Tanzania. The small scale municipal solid waste incinerator modelling was done by using a fluent solver. The case study of the existing incinerator at a Bagamoyo hospital in Tanzania was used as a model and the obtained values were compared with simulated results and other publications for valid...
Modeling of municipal solid waste (MSW) incineration in Spain and Portugal
LCA of waste management systems involve the treatment of a waste mixture with different characteristics. So, it was necessary to estimate the impacts associated to each waste fraction using different allocation rules. These types of systems are so called multi-functional process being incineration a clear example. In this paper the Life Cycle Inventory (LCI) and a multi functional model were developed to describe Municipal Solid Waste (MSW) incineration in Spain and Portugal. In the model, whenever possible, physical and chemical causation allocations were applied. When a causation relationship cannot be established, allocation was done based on a physical parameter (energy or mass).