微纳米气液分散体系吸收脱除NO的工艺优化研究

Research on process optimization for removal of NO by micro-nano gas-liquid dispersion system

以模拟烟气为气相,酸碱溶液、十二烷基苯磺酸钠(SDBS)溶液为液相,利用微纳米气泡发生器将模拟烟气和吸收液混合产生微纳米气液吸收脱除模拟烟气中的NO,探讨了进气NO体积分数、吸收液pH值、O_2含量、SDBS浓度和吸收液温度等对脱硝效率的影响。结果表明,脱硝效率随着进气NO体积分数和SDBS溶液浓度的增大而降低;随着吸收液pH的增大,先降低后缓慢增大;随着O_2含量的增大而增大;随着吸收液温度的上升先增大后减小。最佳工艺条件为:进气NO体积分数0.02%,吸收液pH值2.0,吸收液温度25℃,O_2含量8%。在最佳工艺条件下,NO吸收效率可达到87.8%。

The simulated gas was used as the gas phase,the acid-base solution and sodium dodecylbenzene sulfonate(SDBS)solution were used as the liquid phase,and the micro-nano bubble generator was used to mix the simulated flue gas and the absorption liquid to generate micro-nano gas liquid to absorb and remove NO in the simulated flue gas.The effects of inlet NO volume fraction,absorption pH,O2 content,SDBS concentration and absorption temperature on the removal of efficiency were discussed.The results showed that the NO absorption efficiency decreased with the increase of the inlet NO volume fraction and the SDBS solution concentration;as the pH of the absorption liquid increased,it first decreased and then slowly increased;it increased as the O2 content increased;it first increased and then decreased as the temperature of the absorption liquid increased.The optimum process conditions were as follows:the inlet NO volume fraction is 0.02%,absorption pH is 2.0,absorption temperature is 25℃,O2 content is 8%.Under the optimum process conditions,the NO absorption efficiency can reach 87.8%.