| 摘要 |
The present invention relates to a method for treating nitrogen oxides gas and, more particularly, to a method for treating nitrogen oxides gas which sets a reaction time of a contaminant and a treatment chemical, a liquid-to-gas ratio, and an injection pressure of a nozzle to a stabilization tank, a reaction tank, and a neutralization tank respectively, and then safely processes nitrogen oxides gas (NOx) which is generated at a low temperature of 80°C or less at low temperatures and discharges the processed nitrogen oxides gas. To achieve this, the present invention comprises: a contaminants removal step of removing contaminants except NOx among gaseous materials of nitrogen oxides gas (NOx) by supplying neutralizing agents such as NaOH when the nitrogen oxides gas (NOx) generated from industries using nitric acid is collected and injected into a stabilization tank; a nitrogen oxides (NOx) removal step of removing the nitrogen oxide (NOx) by reacting with a reaction chemical Na2S when the nitrogen oxide (NOx) undergoing the contaminants removing step is introduced into a reaction tank; and a neutralization step of neutralizing a discharged gas by spraying a NaOH solution to remove a small amount of the NOx of nitrogen oxides gas (NOx - NO, NO_2) and processing the gas to be in a neutral (pH 7) state when the gas removed with the nitrogen oxide (NOx) is introduced into a neutralization tank while passing through the reaction tank. |
