150 kW新型燃煤炉具脱硝试验研究

Experimental study on denitrification of 150 kW new coal-fired furnaces

结合150 kW新型燃煤炉具的热力分布和流场特性,采用具有宽温度窗口的V_(2)O_(5)-WO_(3)-MoO_(3)/TiO_(2)脱硝催化剂,以含NH^(+)_(4)溶液作为还原剂,进行脱硝试验,开展了还原剂入炉方式、烟气温度、空速、锅炉负荷等对脱硝效率影响的研究。结果表明,在催化剂空速10000/h的条件下,采用高温空行程上部滴入法,脱硝效率在锅炉全工况运行期间均能达到85%以上,且168 h长周期运行后,催化剂未发生明显衰减,具备长期稳定运行条件。

Based on the thermal distribution and flow field characteristics of 150 kW new coal-fired furnace,V_(2)O_(5)-WO_(3)-MoO_(3)/TiO_(2) denitration catalyst with wide temperature window was used to carry out denitration test with NH^(+)_(4) solution as reducing agent.The effects of reducing agent inlet mode,flue gas temperature,space velocity,and boiler loaded on denitration efficiency were studied.The results showed that under the condition of catalyst space velocity of 10000/h,the denitration efficiency can reach more than 85%during the whole operation period of the boiler by using the upper drop method of high temperature air stroke.After 168h long-term operation,the catalyst has no obvious attenuation with long-term stable operation conditions.