The rheodynamics and combustion of coal–water mixtures

The ignition parameters of the coal-water slurry droplets at the different methods of injection into the hot oxidant flow

“…The wellknown experimental technique of the investigations of heating, evaporation, ignition and combustion processes of the CWSP droplets is introduction of the droplet into the hot oxidant flow by certain holder. This approach was used, for example, in [21][22][23][24][25][26][27][28][29][30][31]. Usually, the droplet holders were metal wires, ceramic rods, and junctions of the small thermocouples with quick response.…”

“…However, the effect of the holder material onto the combustion parameters of the CWS or CWSP was out of consideration before the present time. For example, in [21][22][23][24][25][26][27][28][29][30][31] the droplet holders were the junctions of PtRh-thermocouples (with diameters from 0.01 mm to 0.25 mm), quartz threads, nichrome wires and ceramic rods. By the way, the similar approaches are used for investigations of different bio-fuels and other related subjects too [32].…”

Influence of Absorption of Thermal Radiation in the Surface Water Film on the Characteristics and Ignition Conditions

“…Subjective reasons include economic factors (substantial cost advantage of gas over coal [5]) and technological reasons. The objective reasons are insufficient knowledge of the main thermo-physical processes (slow heating, evaporation of water) and thermochemical processes (thermal degradation, inflammation) occurring together during the thermal preparation of the WCF particles to inflammation [6][7][8][9].…”

Influence of Solid Concentration on the Flow Characteristics and Settling Rate of Coal-Water Slurries

“…Additives are usually included to improve stability, homogeneity and dispersability of the mixture [5]. The primary purpose of coal-liquid mixtures is to make solid coal behave as an essentially liquid fuel that can be transported, stored, and burned in a manner similar to heavy fuel oil [6]. Coal-water slurry has been successfully tested and operated in various boilers for power generation and in chemical and metallurgical industries [7].…”