Mechanism Study Of Multi-pollutants Removals From Flue Gas Using DC Corona Radical Shower Technology

With the development of economy and the improvement of environmental protection awareness, more pollutants need be controlled from coal-combustion flue gas. In addition to the primary SO₂ and NO_X, the controls of mercury and hydrocarbon are gradually proposed the program. However, whether from the technical or economical viewpoint, it isn't reasonable that all kinds of pollutants are controlled one by one using combinative methods. In order to reduce the craft complexity and the investment and running cost, it has important realistic signification to develop an integrated control technology for flue gas.The radical shower multi-pollutants removal technology was completely expatiated in this paper. The basic theory study was emphasized and the design and application of amplificatory reactor were analyzed. Firstly, the basically physical process of corona discharge, the forming process of radical shower and the configuration optimization of nozzle electrode was studied. Secondly, the reactive characteristics and mechanism of radical shower SO₂ and NO_X removal was deeply investigated from the experiment and theory. The simultaneous removal of SO₂ and NO_x with radical shower technology was put forward on the basis of optimizing the reactive process and its economical and technical analysis for the large-scale application was done, which provides a new approach in the flue gas pollutant removal field. Finally, the organic exhaust gas decomposition using the radical shower technology was explored. The key factors improving decomposition rate and the decomposition by-products were emphasized. The bond dissociation energies of various organic compounds were calculated using the DFT method in the quantum chemistry.It is found in the corona discharge radical shower experiment that the stable streamer corona can be full of the whole discharge space. The discharge current increases exponentially and presents obvious pulsed characteristics with the increasing discharge voltage. The electric field from nozzle center to nozzle edge is...