METHOD FOR DECONTAMINATION OF A FLY ASH FORMED DURING BURNING OF WASTES AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2020 - IPC C04B18/10 B09B3/00 

FIELD: technological processes.

SUBSTANCE: group of inventions relates to a method for decontamination of fly ash generated during combustion of domestic and industrial wastes and to a device for its implementation. Method for decontamination of fly ash from waste combustion involves feeding toxic fly ash into a reactor, in which toxic fly ash is decontaminated in a medium of highly superheated water vapor in the absence of oxygen, and a highly superheated steam is fed into the reactor in the form of pulsed supersonic jets so, that in reactor stable high-temperature vortex structures are formed, toxic fly ash is fed into the reactor continuously or in portions to ensure maximum stay of fly ash in said vortex structures, intensive shock waves accompanying supply of supersonic jets of highly superheated water vapor, prevent agglomeration of particles of fly ash, removal of neutralized fly ash from the reactor is carried out continuously or in portions; at that, in the reactor for prevention of atmospheric air suction the increased pressure is maintained. Device for implementing said method of decontaminating fly ash includes a reactor and a control system, the reactor is equipped with a pulse detonation generator and a section for feeding heavily superheated steam to the reactor, wherein the strongly overheated water vapor supply section is made so, in order to ensure supply of at least two opposite pulsed supersonic jets of highly superheated steam to the reactor and supply of toxic fly ash to the reactor together with pulsed supersonic jets of highly superheated steam, as well as systems for feeding toxic fly ash, removal of neutralized fly ash and cooling of reactor.

EFFECT: high efficiency of the method of decontaminating toxic fly ash while eliminating preliminary filtration of off-gases.

4 cl, 2 dwg