Plant for extracting substances in gas or mist form from a flow of gas

摘要

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.