A METHOD OF REDUCTION OF NITROGEN OXIDES AND CARBON MONOXIDE IN FURNACE CHAMBERS OF WATER BOILERS AND STEAM BOILERS, ESPECIALLY GRATE BOILERS, AND A SYSTEM FOR REDUCTION OF NITROGEN OXIDES AND CARBON MONOXIDE IN FURNACE CHAMBERS OF WATER BOILERS AND STEAM BOILERS, ESPECIALLY GRATE BOILERS.

摘要

A method of limiting the formation of nitrogen oxides and / or of their reduction consisting in that a process gas or in another variant the process gas with reactant is injected into the combustion chamber in a direction opposite to the main direction of the main flue gas stream flowing through the furnace chamber, at a speed of 30 to 180 m/s, preferably 135 m/s, the injection points being located at a distance of up to 0.5 of the depth of the furnace chamber from the axis of the front screen pipes, at one, two or three levels, the highest level being at the level of the lower edge of the boiler bull nose. The system for the realization of the method reducing NOx according to the invention comprises process gas injection lances (6), reactant injection lances (7), a furnace chamber (10), a process gas intake (11), a process gas fan (12), a measuring system (13) mounted on the process gas collector, a control and shut-off element (14) installed on the process gas collector, a reactant tank (15), a reactant pump (16), a measuring system (17) built on the reactant installation, a control-shut- off element (18) built on the reactant installation, a lance (19) for central injection of the reactant into the process gas.