专利名称：DENITRATION
发明人：SAKAMOTO TOKUO,AIDA NOBUHITO 申请号：JP30270590
reactor4申请日：19901109
公开号：JPH04176325A
公开日：
19920624
专利内容由知识产权出版社提供
摘要：PURPOSE:To suppress the exhausted NOx concentration lower and to suppress the discharge of NH3 by supplying the ammonia of a specified ratio of a stoichimetric quantity of ammonia necessary for the reduction of supplied nitrogen oxides and the ammonia of the quantity controlled by feeding back the nitrogen oxide concentration at the exit of the reactor to a reactor. CONSTITUTION:A treated gas from a treating gas source 1 is mixed with ammonia supplied from an ammonia source 2 and introduced to the reactor 3 to reduce the NOx in the reactor. The gas at the exit of the reactor is properly treated and exhausted. The NOx concentration at the inlet of the reactor is measured with a NOx analyzer 4 and the signal is transferred to a control section 7 and the theoretical quantity of NH3 necessary for the reduction reaction is calculated from the concentration of NOx at the inlet. On the other hand, the NOx concentration of the exit is measured with a NOx analyzer 5 at the reactor exit and the supplying NH3 quantity is calculated together with a theoretical quantity of NH3 and based on the value an NH3 flow rate regulating valve is controlled. By adopting this method, the NOx concentration at the exit is stabilized in a certain range, even through excess or shortage of NH3 occurs with uncertain elements such as NO/NO2 ratio, the flow rate variation of a treating gas, the analytical accuracy of the NOx meter.
申请人：SUMITOMO KEMIKARU ENJINIARINGU KK 更多信息请下载全文后查看

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