Abstract
The ignition and combustion processes of six non-food municipal solid waste (MSW) samples of different type were studied. The samples of wood waste, rubber, leather, cardboard, textile and plastic were put into the combustion chamber at a temperature of 600 °C in air medium at atmospheric pressure. The observations were carried out by means of high-frequency video imaging of the combustion process. Based on the obtained results the characteristic times of the ignition delay, combustion of volatiles and carbon residue were defined. The highest values of ignition delay and combustion of the carbon residue times were obtained for rubber sample and were 11.3 and 285 s, respectively. Significant correlation was found between the time of volatiles and carbon residue combustion and the fixed carbon content of the sample: the higher the Cd content, the higher value of respective time. The concentration peaks of the gas-phase products release during combustion of non-food MSW were presented as well.
Highlights
The annual generation of municipal solid waste (MSW) in the world in 2019 is already more than 1.4 billion tons, with a predicted increase of up to 2.2 billion tons by 2025 and up to 9.5 billion tons by 2050 [1]
Many researchers are actively working to improve the technology of direct incineration of MSW, including selection of optimal performance characteristics of the thermochemical conversion process while taking into account the heterogeneity of the fuel composition
Analysis of numerous sources [3,4] indicates that existing research focuses on the application of multicomponent MSW compositions, the thermal transformation of which is being studied mainly by means of thermogravimetric and mass-spectrometric analysis
Summary
The annual generation of municipal solid waste (MSW) in the world in 2019 is already more than 1.4 billion tons, with a predicted increase of up to 2.2 billion tons by 2025 and up to 9.5 billion tons by 2050 [1]. One of the significant problems of efficient incineration of MSW is its heterogeneous composition and unsatisfactory technical characteristics, such as low calorific value, high ash content and humidity. Many researchers are actively working to improve the technology of direct incineration of MSW, including selection of optimal performance characteristics of the thermochemical conversion process while taking into account the heterogeneity of the fuel composition. Analysis of numerous sources [3,4] indicates that existing research focuses on the application of multicomponent MSW compositions, the thermal transformation of which is being studied mainly by means of thermogravimetric and mass-spectrometric analysis. In current paper the results of experimental study of the conditions and characteristics of the ignition and subsequent combustion of six non-food MSW samples in a combustion chamber, the heating conditions in which are similar to real fuel-burning equipment.
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