METHOD AND DEVICE FOR RECYCLING AND REUSING A ROOFING BITUMINOUS MATERIAL

摘要

The invention relates to material recycling, in particular to recycling and reusing roofing bituminous wastes. The inventive method consists in grinding wastes and in loading said wastes in a tank for melting bitumen and removing a paperboard base therefrom in the presence of a liquid contact heat carrier. During heating, a combustion gas is removed under a pressure from the furnace of the tank through a duct in order to reduce the combustion gas pressure and through a pipeline to a gas separator for retaining and deposing carbon. Afterwards, the gas is led to a filtering unit and exhausted to the atmosphere in the form of a pure air. The molten bitumen and a paperboard paste are removed from the melting tank and cooled to a temperature equal to or less than 140 DEG C. The paperboard paste is washed in a bitumen-solving reagent and is used for producing roofing materials and/or as a burning material. A liquid phase remaining after washing is used in the form of a base for producing bituminous paints, the carbon is used at least for producing mechanical rubber goods or as a dyestuff or as a pigment for a paint and varnish production. The device for carrying out said method and the elements thereof such as a gas separator, a gas filtering unit and a bitumen-melting boiler are also disclosed. Said invention makes it possible to optimise a process for a nonwaste and ecologically clean recycling of the roofing bituminous wastes, to increase the low-energy and low material consuming high performance production, reduce the reprocessing time, simplifies the method and reduce the material consumption of the device.