| 摘要 |
<p>PURPOSE:To obtain a compact and safe waste gas treating device excellent in denitrating capacity by introducing a waste gas into a plasma generation vessel, impressing a monopulse electric field on an electrode from a high-voltage pulse power source against a gas current to generate non-equilibrium plasma having a high electron temp. in the passage and further controlling the pulse repetition frequency. CONSTITUTION:An inlet pipe 2 and an outlet pipe 3 are connected to a treating vessel 1, discharge electrodes 4a and 4b are oppositely provided in the vessel, and a high-voltage pulse power source 5 contg. a trigger pulse controller 6 as the control part is connected to the discharge electrode 4. A flowmeter 7 is provided on the gas inlet side and a gas sensor 8 on the gas outlet side, and the signals are inputted to the controller 6. Gaseous NOx are introduced into the vessel 1, a monopulse high electric field is impressed to generate non- equilibrium plasma having a high electron temp. in the passage, and NOx are ionized, dissociated and removed. The high-voltage pulse string is controlled by the controller 6 to control the pulse repetition frequency proportional to the treating flow rate or NOx concn.</p> |
