Abstract: A combined combustion and exhaust gas filter plant including a combustion chamber (5) for pressurized combustion of combustible substances, a supply device (3, 8) for supplying up to 100 percent oxygen enriched combustion air to the combustion chamber (5), and a scrubber (10, 12) for pressurized cooling and washing with water of exhaust gases produced by the combustion chamber (5). The scrubber (10, 12) separates environmentally endangering materials and other contaminants from the exhaust gases and includes a deducting device for deducting the washing water and the environmentally endangering materials and other contaminants captured, dissolved or condensed in the washing water.

Abstract: A plant for separating substances from a gas flow, especially environmentally harmful heavy metals in gas form released in connection with incinerating batteries, the plant including in series connection in a gas flow circuit, a chamber for initially collecting the gas flow containing the substances to be separated; a compressor which pressurizes the gas flow; an expansion device through which the pressurized gas flow passes while rapidly lowering the pressure and temperature of the gas flow so that at least a part of the substances to be separated condense and are separated in solid or fluid state in a separation chamber, the inlet of which is connected to the outlet of the expansion device and which is provided with an outlet for the remaining gas flow which communicates with the inlet of the collecting chamber to form a closed gas-circulation circuit.

Abstract: The invention relates to a combustion process with cleansing of the waste gases by compressing, cooling and expanding said gases.The invention provides a continuous process in which highly contaminated low-grade fuels having a high water content can be effectively burned and the waste gases efficiently cleansed, by subjecting the cooled waste gases, together with residual non-desired substances, to a rapid drop in pressure in one or more stages by means of an expansion means (5), whereat the input drive power of the compressor (3), required for compressing said gases, is so high that the temperature downstream of the expansion means (5) is sufficiently low for the condensation and precipitation of frozen contaminants in the waste gases, together with ice crystals.The invention can be applied to all forms of combustion plants, primarily combined power and heating plants fired with fuel having a high sulphur and water content.