Method for removing SO2, NOx and Hg in the flue gas boiler comprising more than 5 of calcium oxide in the ash and arrangement for applying the method

摘要

the invention of the method of removal of so2, nox and hg from the exhaust gas boiler fluidalnych, containing more than 5% of cao in the ashes, is that from the exhaust stream leaving the boiler fluid, is secreted to purification of 20 to 80% exhaust gas from which removes so2 and no2 for help y ca (oh) 2.with ca (oh) 2 is obtained by injection to exhaust drop size not greater than 100 mm water or aqueous solutions, activating molecules of cao in the ashes. and then cooled down to the temperature of flux of 50 - 90u00b0c removed and hg, using utleni acza, in the form of a hydrogen peroxide or ozone or oxychloride.purified exhaust gas is mixed with the exhaust gas, which were not treated is filtered to remove dust and calcium salts such as sulfites, sulfates and nitrates. the invention also includes a system for removal of so2, nox and hg with exhaust gas, equipped with a reactor (1), in which the exhaust gas inlet (2) is situated in the lower part of the inlet and exhaust is zsypowy funnel (3).exhaust over inlet (2), are placed dwustrumieniowe nozzles (4) for spraying water and aqueous solutions in very small drops, which are connected by pipeline with a source of compressed air (7) and the tank (5) of waste water or aqueous solutions by a pump (6) and a valve regulator (8).in addition, in the upper part of the reactor (1), the exhaust gas outlet is located below the nozzles (9) combined oxidant pipeline with a source of compressed air (13) and the generator (10) or oxidant, by the pump (11) and the valve (12).