Method and system for wasteless processing and complete utilization of municipal and domestic wastes

A system for processing and utilizing municipal and domestic waste comprising the following main modules connected in series:

• a waste pre-treatment and feed module, a pyrolysis reactor, a syngas cleaning module, and an energy generation unit, wherein
• the waste-pretreatment and feed module comprises:
• a waste-sorting unit for sorting the wastes to be treated and for removing untreatable items;
• a waste-mixture grinder for grinding the presorted wastes to produce ground wastes of a predetermined dimensions suitable for processing and utilization, the waste-mixture grinder being connected to the waste-sorting unit;
• a dryer for drying the ground wastes, the dryer being connected to the waste-mixture grinder;
• and a dry-waste accumulator with a loading mechanism and an unloading mechanism, the loading mechanism being connected to the dryer, and the unloading mechanism being connected to the pyrolysis reactor that decomposes the wastes essentially into a syngas and solid products of pyrolysis;
• the pyrolysis reactor comprises two waste-feeding screws tapered in shapes with a taper angle that decreases the diameters of the waste-feeding screws along the length of the waste-feeding screws, the waste-feeding screws converging toward each other with a convergence angle;
• the syngas cleaning module comprises:
• a dry cleaner that is connected to the pyrolysis reactor for receiving the syngas produced in pyrolysis;
• a gas cooler for reducing the gas temperature;
• a wet-cleaning stage connected to the gas cooler and that comprises a first wet syngas cleaner connected to the gas cooler and intended for cleaning the syngas with a flow of water, and a second wet syngas cleaner connected to the first wet syngas cleaner and intended for cleaning syngas with a flow of an alkali solution;
• and an absorber that is connected to the wet-cleaning stage for receiving the syngas therefrom and for separating at least a reusable gaseous carbon dioxide from the syngas;
• the system further comprising:
• a floatator that is connected to the wet-cleaning stage and produces reusable water;
• a centrifuge which is connected to the unloading mechanism of the pyrolysis reactor and is intended for purification of the solid products of pyrolysis;
• and a desorber that is connected to the absorber and has means for separating the CO2-saturated aqueous solution obtained from the absorber into CO2 and processing water.