烧结金属催化材料用于燃煤烟气净化的试验研究

Experimental Study on Cleaning of Flue Gas from Coal Combustion Using Sintered Metal Catalytic Materials

采用以烧结金属粉末微孔过滤材料为烟尘过滤材料和催化剂基体、V2O5γ-Al2O3为催化剂、NH。为吸附剂的过滤原件，可实现对锅炉烟气中烟尘、SO2和NO2的同时去除。实验室试验结果表明：在150℃以下，SO2的去除率随温度的升高而增加，在150℃以上，SO2的去除率趋于稳定，均在90％以上；在50-350℃内，NO的去除率分别在150℃和300℃达到最高；在n（NH3）／n（NO）=1．0～1．6范围内，SO2和NO的去除率随NH3的升高而增加，n（NH3）／n（NO）〉1．6，SO2和NO的去除率趋于稳定。现场试验结果表明：在不同试验条件下，燃煤烟气经过金属过滤器处理后，其中的烟尘、SO2和NOx的过滤效率分别高于99％、94％和82％，浓度远低于北京市锅炉排放标准（DB11／139—2007）中的新建锅炉排放限值。

To achieve the aim of simultaneous removal of dust, SO2 and NOx from the flue gas of coal, the sintered metal materials and the active component V2 O5 · γ-Al2O3 were tested as filter and carrier. Laboratory experiment results show that the SO2 removal activity increases when the temperature is below 150℃ and remains steady when the temperature is above 150℃. The NO removal efficiency is at the maximum at the temperature of 150℃ and 300℃ in the range from 50-350℃. When n（NH3）/n（NO） is from 1.0 to 1.6,the SO2 and NO removal activity increases with the increase of the concentration of NH3. When n （NH3）/n（NO）is 〉1.6, the SO2 and NO removal activity remains steady. Spot experiment results show that the removal efficiency of dust, SO2 and NO, at different experiment conditions can be above 99 %, 94% and 82% respectively, so the emission concentration of dust,SO2 and NOx is much lower than that of the emission standard of air pollution for boilers in Beijing.