Zhaivoronok V. Research and development of the technology of production of high-reaction sorbent from limestone in a fluidized bed of an inert material

The dissertation is devoted to the research and development of the technology of production of highly reactive sorbent from limestone, followed by application in dry and semi-dry methods of flue gas desulphurization. The sorbent is obtained as a result of the calcination of finely divided limestone in apparatus with a fluidized bed of inert grainy material. The results of analysis of limestone burning process in classical burning machines are presented. The production of highly reactive sorbent is due to a number of difficulties, which are, first of all, with the loss of the reactivity of the product of burning due to the sintering with prolonged residence of the product in the high temperature zone. A numerical study was carried out on the process of burning finely dispersed limestone in a fluidized bed of inert grains, and the influence of process parameters on the qualitative characteristics of the sorbent was determined. Experimental studies of the calcination process on the installation of a fluidized bed of an inert grainy material have been carried out, the main characteristics of the obtained samples of the sorbent (specific surface, porous structure) have been determined, the adsorption capacity of the sorbent in the absorption of sulfur dioxide has been studied. The specific surface of the samples obtained was: S = 28 m2/g by BET method and 28 m2/g - DFT, pore volume 0,493 cm3/g and 0,216 cm3/g, respectively, pore size 118 a and 67 a, respectively. Designed and developed designs of devices with a fluidized bed of inert grain material with reduced specific fuel consumption for the burning process, selected standard equipment for the energy-saving industrial line of high-reaction sorbent production. The thermodynamic calculations of stoichiometric combustion of solid fuel with the simultaneous process of absorption of sulfur dioxide from waste gases are carried out.