METHOD AND APPARATUS FOR THERMAL RECYCLING OF WASTE BY HIGHLY SUPERHEATED WATER VAPOUR Russian patent published in 2022 - IPC B09B3/45 

FIELD: recycling.

SUBSTANCE: invention can be used in thermal recycling of gaseous, liquid, and solid waste. Method for thermal recycling of waste includes the production of superheated water vapour in a detonation steam superheater (3), wherein supersonic jets of superheated water vapour are supplied into the reactor (1), accompanied by shock waves, forming stable vortex structures in the reactor (1) while maintaining high pressure in order to prevent suction of atmospheric air. The waste is supplied to the reactor (1) continuously or in portions. The waste is recycled in the reactor (1) using superheated water vapour, preventing the agglomeration of waste particles due to the impact of shock waves. The products of waste recycling are removed from the reactor (1) continuously or in portions. Superheated water vapour is supplied to the reactor (1) in the form of continuous supersonic jets so as to form stable stationary vortex structures in the reactor (1). Continuous supersonic jets of superheated water vapour are obtained through the combined impact from detonation waves circulating continuously in the detonation steam superheater (3) in the fuel-oxidiser mixture and from the heat-loaded walls of the detonation steam superheater on water vapour jets, or on liquid jets, or near-wall feed water films continuously supplied to the detonation steam superheater (3). Namely, continuous supersonic jets of highly superheated water vapour are obtained through the thermomechanical impact from detonation waves, consisting in overheating water vapour and in performing aerodynamic dispersion of liquid jets and near-wall films to feed water droplets, evaporating the feed water droplets, and overheating the resulting water vapour; and through the thermal impact from the heat-loaded walls of the detonation steam superheater (3), consisting in transferring heat from the heat-loaded walls to water vapour jets, and/or to liquid jets, and/or to near-wall films. The continuous supply of feed water to the detonation steam superheater (3) in the form of water vapour jets, or liquid jets, or near-wall films ensures that the heat-loaded walls of the detonation steam superheater are being cooled. The waste undergoes aerodynamic fragmentation both under the impact of continuous supersonic jets of superheated water vapour and under the impact of shock waves attached to the detonation waves continuously circulating in the detonation steam superheater (3). The products of waste recycling removed from the reactor contain combustible gas used as fuel in the fuel-oxidiser mixture and/or directed to the consumer, as well as liquid acids and solid non-toxic residue directed to the consumer. The reserve fuel can be, e.g., natural gas. Disclosed is an apparatus for thermal recycling of waste.

EFFECT: increase in the productivity of high temperature recycling of waste using highly superheated water vapour, resulting in combustible gas, acids, and solid non-toxic residue without adversely affecting the environment.

8 cl, 2 dwg