Patent ID: 9091483
Filing Date: 2015-07-28
Classification: C04B,F23G,F23J,F27B,F27D,Y02P

Abstract:
1. Process for purifying a flow of combustion fumes from a clinker production plant comprising the following operating steps: a) removing dust from a flow of combustion fumes at a temperature comprised between 250 and 340° C. from a rotary kiln by passing said combustion fumes to a multistage preheater and then directly passing said flow of combustion fumes to an electrofilter with formation of a flow of combustion fumes free of dust; b) passing the flow of combustion fumes free of dust from step (a) directly to a selective catalytic reducer and carrying out on said flow of combustion fumes free of dust a selective catalytic NO c) recovering heat from said purified flow of combustion fumes by means of at least one heat exchanger or a conditioning tower; and d) submitting the purified flow of combustion fumes obtained from said at least one heat exchanger or conditioning tower to a further pollutant removal treatment by a step comprising a lowering treatment of sulphur oxides present in the purified flow of combustion fumes which include SO