An experimental study of thermal DeNOx process with different additives was performed in an electricityheated tubular flow reactor,showing that CO is less effective to lower the optimum temperature than H2 and CH4. The maximum NO reduction is lowered with H2 added,while it is hardly affected by CO or CH4.The temperature window is widened appreciably with CH4 added,while it is narrowed slightly by H2 or CO.The disadvantage of CH4 is that it causes CO emission due to its incomplete oxidation,and the maximum conversion of CH4 to CO is more than 50%.In general,the calculation using a detailed chemical kinetic model predicts most of the process features reasonably well.The analysis on reaction mechanism shows that the effects of these additives on NO reduction are achieved principally by promoting the production of·OH radical.
基于CFD软件平台，对燃烧研究设备（combustion research facility，CRF）中试试验装置的选择性非催化还原（selective non—catalytic reduction，SNCR）脱硝过程进行模拟计算，通过与试验结果的比较，验证了该文的数学模型和计算方法。文中研究了在不同的温度、氨氮摩尔比条件下，喷射尿素溶液对脱硝效率和漏失氨的影响。计算结果表明，随着[NH3]／[NO]的增加，NO的还原率逐渐提高，在[NH3]／[NO]为1．0-2．5时可以达到50％-90％的NO脱除效率。同时由于随着氨氮摩尔比的增加，漏失氨也随之增加，因而应合理控制氨氮摩尔比在1．5左右。
