TY - THES

T1 - Influences on the efficiency of water-based dust binding and the effects of dust

AU - Leitner, Patrick

N1 - no embargo

PY - 2022

Y1 - 2022

N2 - The aim of this master thesis is to investigate the influences on the dust binding capacity of water mist in order to determine where there is still potential for improvement and where further research and experiments should be performed to increase the overall efficiency of the corresponding systems. To achieve this, it is first necessary to understand the process of dust binding and subsequently identify the influences. Dust collection using water mist will be compared to other collection mechanisms and as a closure it will be explained why a reduction of the dust emission is necessary. This work can be divided into several chapters by the different individual steps. First, the exact goals are elaborated, which are necessary to ensure a complete understanding and a clean processing of the topic. In the second step, the interaction between particles and droplets and which different bonding forms and separation mechanisms can occur is worked through. This includes both the physical and the chemical bonds. Subsequently, in the main part of this thesis, the influences on the previously described bond types have to be determined. The different effects shall be discussed as well as the intensity of the influence at different particles sizes will be determined. This will be done on the basis of experiments already carried out in worldwide literature. Furthermore, a grouping of the factors will be made. Then, the different dust collection systems will be explained and their efficiencies will be discussed in order to compare them and to show where which type of filter should be used, as well as the advantages of separation of using water mist. The next two topics, and thus the final ones, are intended to show why it is important to emit as minimal dust as possible. In the penultimate chapter, the effects of dust on mankind will be discussed. This includes the inhalation of particles as well as the effects on the working environment, for example the explosiveness of dust and which maximum dust concentrations have to be considered. In the last chapter, the effects of dust on the environment and the threshold values that must be observed are explained.

AB - The aim of this master thesis is to investigate the influences on the dust binding capacity of water mist in order to determine where there is still potential for improvement and where further research and experiments should be performed to increase the overall efficiency of the corresponding systems. To achieve this, it is first necessary to understand the process of dust binding and subsequently identify the influences. Dust collection using water mist will be compared to other collection mechanisms and as a closure it will be explained why a reduction of the dust emission is necessary. This work can be divided into several chapters by the different individual steps. First, the exact goals are elaborated, which are necessary to ensure a complete understanding and a clean processing of the topic. In the second step, the interaction between particles and droplets and which different bonding forms and separation mechanisms can occur is worked through. This includes both the physical and the chemical bonds. Subsequently, in the main part of this thesis, the influences on the previously described bond types have to be determined. The different effects shall be discussed as well as the intensity of the influence at different particles sizes will be determined. This will be done on the basis of experiments already carried out in worldwide literature. Furthermore, a grouping of the factors will be made. Then, the different dust collection systems will be explained and their efficiencies will be discussed in order to compare them and to show where which type of filter should be used, as well as the advantages of separation of using water mist. The next two topics, and thus the final ones, are intended to show why it is important to emit as minimal dust as possible. In the penultimate chapter, the effects of dust on mankind will be discussed. This includes the inhalation of particles as well as the effects on the working environment, for example the explosiveness of dust and which maximum dust concentrations have to be considered. In the last chapter, the effects of dust on the environment and the threshold values that must be observed are explained.

KW - wet scrubber

KW - spray scrubber

KW - water mist

KW - dust binding

KW - dust and health

KW - dust and environment

KW - Nasswäscher

KW - Sprühwäscher

KW - Wassernebel

KW - Staubbindung

KW - Staub und Gesundheit

KW - Staub und Umwelt

M3 - Master's Thesis

ER -