Continuous regeneration of carbon adsorbers using hot nitrogen supplied from cryogenic storage - in which heat is transferred from the desorbed-pollutant laden gas to vapourise nitrogen in heat exchanger and also condensing pollutants

摘要

In a process to regenerate adsorbers (1) or adsorption plants, liquid gaseous desorption agent from a cryogenic storage tank is vapourised. This is brought to an appropriate temperature and passed through the adsorption material in the adsorber (1). On leaving the adsorption plant the laden gas is supplied to a heat exchanger (9) for separation. Also claimed is apparatus to carry out the process, having appropriate pipework, liquid nitrogen storage vessel (6), heater (5), compressor and valve to release excess gas (14).