Influence of simulated MSW sizes on the combustion process in a fixed bed: CFD and experimental approaches

Simulation and Optimization of Municipal Solid Waste Combustion: A Case Study of a Fixed Bed Incinerator

“…Incineration optimization being the best design alteration process is a condition in which municipal solid waste (MSW) materials are heterogeneous in nature [1,2]. They are heterogeneous in size, shape and geometry [3] with low energy contents, high moisture and pollution source materials [4,3,5]. Incineration is a process of oxidizing carbohydrates present in solid waste to carbon dioxide and water [6,7].…”

“…The optimization process performed using simulation is preferred since it is faster and environmental friendly [17,18]. There are abundant of complex information and data being generated by simulation [4] and therefore designers of incinerators need to understand the characteristics of input and output parameters and conditions [19]. The understanding of inputs such as proximate and ultimate analysis values, type of waste, primary chamber and secondary chamber airflow and the output parameters such as temperature, flue gas, bottom and fly ash composition are important information for designers [20].…”

“…Optimization of operating conditions using Computational Fluid Dynamics (CFD) techniques is considered as economical [21] and flexible [22,23]. CFD is a popular approach that has been used to model, simulate and optimize MSW incinerators in a number of studies [4,24,25,26]. CFD is therefore very useful for visualizing some cardinal aspects of the combustion chamber, i.e., the fluid flow field (flow vectors, indicating flow direction, and rate in each point), temperature and pressure field, and combustion rate field.…”

“…The secondary chamber is set to admit oxidant in order to complete burn all gases generated at primary chamber [34] and destroy all incomplete combustion products [14]. The gases generated at primary chamber include CO, CO 2 , H 2 , H 2 O, CH 4 and trace of hydrocarbons [6]. The speed and quantity of air inlet at the chambers are used to increase or decrease a residence time in a primary or secondary chambers and therefore enhance combustion [32].…”

Investigation of multi‐fuel combustion behavior and synergy effect using improved steady‐state discrete particle model simulation

“…1 Many experimental studies have been carried out to investigate the effect of MSW properties as well as operating conditions on the combustion behavior. For example, Sun et al 2 studied the influence of the MSW particle size on the combustion process in a fixed bed and showed that the average emission of CO and CO 2 gradually decreased when the diameter of the particle increased. In the other study, Sun et al 3 investigated the effect of ash content on the combustion of MSW and concluded that the increase in ash content led to the increase of time required for char combustion and consequently char particles leaving the combustion zone incompletely reacted.…”