KBr和KI改性钒钛钢渣脱除燃煤烟气Hg~0试验研究
Experimental study on KBr and kl modified vanadium and titanium steel slag applied to remove Hg~0 from coal-fired flue gas
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摘要: 为进一步提高固体废弃物钒钛钢渣(VTSS)吸附脱除Hg0性能,利用浸渍方法改性制取KBr/VTSS、KI/VTSS吸附剂,并运用XRD、SEM表征,在固定吸附床上研究了反应温度、烟气SO2、O2、H2O和改性剂负载量对Hg0脱除效率的影响。结果表明:升高反应温度显著提高Hg0脱除效率和累积吸附量,负载3%KI的吸附剂,其Hg0脱除效率最高,在200℃下的最高效率可达97.9%,吸附3 h后的吸附容量为163.4μg/g;SO2和H2O抑制Hg0的吸附,而O2显著促进Hg0的吸附;KBr、KI负载量的提高可促进Hg0脱除,分别负载10%KBr和3%KI的吸附剂,在120℃时Hg0脱除效率最高分别达到73.5%和90.6%,吸附3 h的累积吸附量分别达到114.1和153.1μg/g。Abstract: in order to furthr improve the HgO adsoption and removal perfomances of the vanadium and tanium steel slag- the solid wastes,an immersion method was aplied to metify and make the Kr anadium and tanium see sag and Kl anadiunm an tanum teel slag adsobents and the XRS and SEiMl characterzation;were appied to the fived adsorption bed to study the reaction termperature,802,02 and H2o in the fue gas and the modfier oading quantty afcted to the HgO removal ficiency.The resuts showed that thereacion temperatue increased would obviously improve theHgO removal eficiency and accumulated adsorption volume.The adsoroent with a 3% loading of k.the Hg0 removaleticiency would be the bet.Under the temperature below 2 ℃,the ma .ticiency of the Hg0 removed could be 97.9% and afier three hours of the absorpton,the adsorption volume would be 163.4 pg g.s02 and H20 would restrain th adsorpion ofHg0 and O2woud obviously aomote the acsorption of Hg0.The KBr and 'Kl lading volumes coud improve the removal of rg0 and the adsobents coud load 10% Kir and 3% Kidivicual l when ttemperature reached to 120 C.the Hg0 removal eficiency wcauld maxieall reach at 735% and g0. % indidcally Afer three hours ofth asopion.the accurmulated absorption volume would be 114.1 and153.1 ug / g individually.