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《烟气脱硫论文:燃煤烟气naclo_2-naclo复合吸收液同时脱硫脱硝试验研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、烟气脱硫论文:燃煤烟气NaClO_2/NaClO复合吸收液同时脱硫脱硝试验研究【中文摘要】燃煤烟气排放的污染物主要有烟尘、SO2、NOx、Hg及温室气体CO2等,传统的烟气治理思路往往是一套设备去除一种污染物,一次投资大,运行成本高,占用土地多,随着我国环保要求的不断提高,依旧按照传统的思路,企业将不堪重负。同时脱硫脱硝技术与以后进一步发展的多污染物一体化控制技术可以解决传统思路带来的问题,这一研究方向将成为今后烟气治理的必由之路。本文在NaClO2具有较好脱硫脱硝能力的基础上,选择NaClO作为添加剂,成功研究了NaClO2/N
2、aClO复合吸收液,在自行研制的脱硫脱硝实验室小试装置上进行模拟烟气的脱硫脱硝试验。研究了各种工艺参数对脱硫脱硝效率的影响,综合考虑脱除效率和实际工况条件确定了最优操作条件。试验结果表明,NaClO2浓度为6mmol/L,NaClO浓度为1mmol/L,吸收液pH为6,初始SO2浓度为2850mg/m3,初始NO浓度为670mg/m3,反应温度为55℃,烟气流量(Qg)为20m3/h,液气比(L/G)为20L/m3时,平均脱硫脱硝效率分别能达到99.8%、94.0%。本文还分析了复合吸收液的反应机理,推导了可能发生的反应,并确定了
3、总化学反应方程式,计算了热力学参数△G0、K0、△H0及不同温度下SO2和NO的分压,证明了反应的可能性。从经济性考虑,对比了NaClO2、NaClO用量和成本。本文基于对我国烟气治理前景的判断和考虑,提出了NaClO2/NaClO复合吸收液同时一体化脱硫脱硝工艺方法,该方法脱硫脱硝效率高、设备简约、投资小、运行简单,具有重要的理论意义与应用推广价值。【英文摘要】Themainpollutantsofcoal-firedfluegasareflyash,SO2,NOx,HgandgreenhousegasCO2.Thetradit
4、ionaltreatmenttechnologiesalwaysremoveonlyonepollutantinadevice,resultsinit’slargeinvestment,highcostforoperationandmuchoccupationofland.Withtheimprovementofenvironmentalrequirements,theenterpriseswillbeoverwhelmediftheystillfollowthetraditionalidea.Thetechnologyofsim
5、ultaneousdesulfurizationanddenitrificationandmulti-pollutantintegratedtechnologybothquicklybecomethestudypointsfortheiradvantagestosolvetheproblemsexistinthetraditionalmethods.BasedonthegooddesulfurizationanddenitrificationefficienciesandtheconsiderationofcostaboutNaC
6、lO2,NaClOwasselectedasanaddition.TheeffectsofoperatingparameterstotheremovalefficienciesbyNaClO2/NaClOcompoundabsorbentwerestudiedinaself-designedsprayingtower.Withthecomprehensiveconsiderationoftestresultandtheworkingconditionofpracticalproject,theoptimumoperatingpar
7、ameterswereconfirmed.Thetestresultshowedthatthedesulfurizationanddenitrificationefficienciescouldrespectivelyretain99.8%and94.0%inthefollowingtestcondition:theconcentrationofNaClO2andNaClOwere6mmol/Land18mmol/L,respectively;thepHvalueoftheabsorbentwas6;theinitialconce
8、ntrationofSO2andNOwere2850mg/m3and670mg/m3,respectively;Thereactiontemperaturewas55℃;thefluegasfluxwas20m3/h;theL/Gwas20L/m3