Patent ID: 7509799

Claim:
An exhaust gas treatment system in which a nitrogen oxide in an exhaust gas is reduced, comprising: an exhaust gas flue into which said exhaust gas is introduced; an exhaust gas diversion passage portion provided in said exhaust gas flue and in which at least part of said exhaust gas is introduced from the exhaust gas flue; a urea solution injection valve, which is provided in said exhaust gas diversion passage portion, for injecting a urea solution into said introduced exhaust gas, which is introduced into said exhaust gas diversion passage portion; a heating portion, which is provided at an outer periphery of said exhaust gas diversion passage portion, for heating said urea solution, which is injected from said urea solution injection valve; an ammonia generation portion for generating an ammonia by decomposing particulate droplets of said urea solution, which is heated by said heating portion and said ammonia; a mixing portion for mixing said ammonia generated in said ammonia generation portion with said exhaust gas; and a denitration catalyst reactor, to which said ammonia and said exhaust gas are introduced after being mixed in said mixing portion.