| abstract |
TECHNICAL FIELD [0001] The present invention relates to a technology for reducing nitrogen oxides (NOx), which is a harmful exhaust gas discharged from an internal combustion engine or a combustor, by pyrolyzing the solid ammonium salt into a reactor using engine cooling water, exhaust gas or electric heater installed in the reactor, And ammonia is injected by using a pressure valve and a dosing valve to reduce nitrogen oxides present in the exhaust pipe to nitrogen on the selective reduction catalyst, wherein the first chamber and the second chamber of the reactor are separately formed, Which is capable of reducing nitrogen oxides in a short period of time at the initial start-up and reducing the energy consumption required for heating the reactor, by rapidly raising the temperature of the solid ammonium salt to a temperature capable of pyrolysis of the solid ammonium salt. For example. |