| 摘要 |
An exhaust gas denitrifing system using a vaporizer is provided to reduce size of the denitrifing system, maximize the denitrification efficiency, reduce size and space of the entire system, prevent damage to a cap due to heat of a heating part, denitrify nitrogen oxides contained in exhaust gas, and prevent environmental pollution. An exhaust gas denitrifing system using a heater comprises a urea water supply part(2), an air supply part(1), a vaporizer(3), an ejection part, a reaction chamber, and a reactor, wherein: the vaporizer comprises a heating chamber(32) which is in communication with an air inflow path(13) of the air supply part, and which is formed in such a manner that air flown into the heating chamber from the air inflow path is heated, and the heated air is exhausted through one end of the heating chamber, a heater(33) which is installed in the center of the heating chamber and longitudinally extended to a specified length to heat the air flown into the heating chamber from the air inflow path, and a vaporizing chamber which has the heating chamber inserted into an upper face thereof, and in which heated air flown into the vaporizing chamber ascends to convert urea water into ammonia in a gaseous state; and the urea water supply part comprises urea water spray nozzles(26) formed on an upper side of the vaporizing chamber in such a shape that increases a heat transfer area through which urea water flown into the vaporizing chamber can receive a heat from the heated air ascending to an upper part of the vaporizing chamber so that size of the entire denitrifing system can be reduced by reducing size of the vaporizer.
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