HYBRID NOX ELIMINATION SYSTEM COMPRISING YELLOW PLUME ELIMINATION SYSTEM AND SELECTIVE CATALYTIC REDUCTION SYSTEM

摘要

Provided is a reduction method of nitrogen dioxide by using a reducing agent for the nitrogen dioxide among exhaust gases of stationary sources. The present invention has a feature of spraying one reducing agent which is selected from a group comprising of oxygenated hydrocarbons which include one or more hydroxyl group, ether group, aldehyde group, or ketone group and has three or more carbon numbers in one molecule; or which include two or more hydroxyl groups, ether groups, aldehyde groups, or ketone groups and has two or more carbon numbers in one molecule; carbohydrate; and a mixture thereof from one or more spraying spots to a moving path for exhaust gas containing nitrogen dioxide. The present invention has an advantage of effectively reducing nitrogen dioxide with low operating costs by reducing an amount of by-products which are generated or increasing a removal rate of nitrogen dioxide base on an injection amount of a reducing agent in a wide range of temperature.