CAJ | 학술논문

为研究燃煤机组烟气中汞(Hg)的迁移特性，同时采用安大略法和活性炭吸附管法，对不同负荷、不同煤种工况下某典型燃煤机组中烟气 Hg 的迁移排放规律进行了全过程研究，并对各输入、输出物料进行了系统的Hg 质量平衡核算，在此基础上得到 Hg 的迁移规律，明确了负荷和煤种因素对烟气 Hg 排放的影响。结果表明，各研究工况下烟气 Hg 的排放浓度均显著低于新国标规定的排放限值，系统总的脱 Hg 效率达90%以上；试验机组配套电袋复合除尘器，对气态 Hg 吸附和细小飞灰颗粒捕集的效果较好，有利于 Hg 的脱除；与高负荷相比，低负荷下 Hg 的排放浓度更低，其主要原因在于较低的烟气温度更有利于 Hg2+在除尘环节的吸附脱除；对于研究中的两个煤种，虽然高 Hg 煤对应的氯含量和 Hg 去除率较高，但由于其总 Hg 含量相对高得多，最终 Hg 排放浓度仍然更高。
위연구연매궤조연기중홍(Hg)적천이특성，동시채용안대략법화활성탄흡부관법，대불동부하、불동매충공황하모전형연매궤조중연기 Hg 적천이배방규률진행료전과정연구，병대각수입、수출물료진행료계통적Hg 질량평형핵산，재차기출상득도 Hg 적천이규률，명학료부하화매충인소대연기 Hg 배방적영향。결과표명，각연구공황하연기 Hg 적배방농도균현저저우신국표규정적배방한치，계통총적탈 Hg 효솔체90%이상；시험궤조배투전대복합제진기，대기태 Hg 흡부화세소비회과립포집적효과교호，유리우 Hg 적탈제；여고부하상비，저부하하 Hg 적배방농도경저，기주요원인재우교저적연기온도경유리우 Hg2+재제진배절적흡부탈제；대우연구중적량개매충，수연고 Hg 매대응적록함량화 Hg 거제솔교고，단유우기총 Hg 함량상대고득다，최종 Hg 배방농도잉연경고。
In onder to stuthy the migration of Hg in fuel gas of Ocoal-frreel generating unit,by means of Ontario hydro method and activated carbon absorption method,this paper studies migration and emission principles of Hg in fuel gas of some typical coal-fired generating unit under different working conditions including different loads and coals types.Mean-while,systematic Hg quality balance check on various input and output materials were conducted.Migration principle of Hg was obtained and affects of loads and coal types on Hg emission in fuel gas were clarified.The results indicate that emission concentration of Hg in fuel gas under different working conditions is obviously lower than emission limit values provided by national standards and the total Hg removal efficiency is over 90%.Meanwhile,effect of absorbing gaseous Hg and gather-ing tiny fly ash particles by mating electrostatic fabric filter for the test unit is good for removing Hg.Comparing with high load working condition,emission concentration of Hg under low load working condition is lower due to lower gas tempera-ture being more favorable to absorb and remove Hg2+ in process of dedusting.For the two coal types in research,chlorine content of the high Hg coal and Hg removal efficiency is higher,but for reason of relatively high total content of Hg,emis-sion concentration of Hg is still higher.