Patent ID: 8795616
Filing Date: 2014-08-05
Classification: B01D,C04B,C10J,F23G

Abstract:
1. A method for treatment of combustion gas and increase of cement production by combining a dual-purpose reactor with cement production system, wherein said dual-purpose reactor comprises a connected combustion chamber and a gas-solid suspension chamber, said method includes the following procedures: (a) high temperature gases from clinker manufacture stage of cement production line are introduced to the combustion chamber of the dual-purpose reactor and/or to the rotary incinerator of a waste combustion system, (b) alkaline materials or waste residues from cement production system are fed into the combustion chamber of the dual-purpose reactor, (c) fuel or wastes of high caloric value are injected into the combustion chamber to raise and then stabilize the temperature in the combustion chamber, (d) combustion gas is introduced into the combustion chamber and/or to the gas-solid suspension chamber, (e) under high-temperature condition, mixture of gases and said alkaline materials or waste residues in the combustion chamber enters the gas-solid suspension chamber of dual-purpose reactor in a spiral pattern, in which said gases are completely mixed with the alkaline materials or waste residues and reacted, so that acid gases, dioxins and precursors thereof are removed, (f) gas-powder mixture released from the dual-purpose reactor is introduced into a high-temperature gas filter where the gases are separated from solid materials, and after energy recovery and filter processing, the gases are then released into the atmosphere via an independent stack as nontoxic gases with a temperature of 120 to 150° C., (g) decomposed alkaline materials or wastes are transferred either to the combustion chamber of the dual-purpose reactor for recycling or to cement kiln as raw materials.