The invention discloses a flue gas combined desulfurization, denitration and mercury removal device and a method thereof. The device consists of 2 combined desulfurization denitration and mercury removal reactor, mercury removal reactor includes upper and lower connectivity of denitrification and mercury removal desulfurization reactor and mercury removal reactor each combined desulfurization and denitrification; 3 chambers desulfurization reactor for mercury removal through the sieve plate is divided into parallel, desulfurization reactor of mercury removal the inlet chamber is communicated with the flue gas entrance is provided with an air inlet chamber, between denitrification and mercury removal reactor is communicated through the discharge chamber, the flue gas outlet is provided with an air outlet chamber; the side wall combined desulfurization denitration and mercury removal reactor gas collecting chamber through the sieve plate and is connected with the gas collecting chamber is provided with a spray device combined with top NH3; desulfurization, denitration and mercury removal reactor with activated coke entrance, the bottom is provided with active coke exports; the active coke export and regeneration reactor is communicated with the regeneration reactor outlet with the activated coke entrance connected. Mercury removing device for flue gas mercury removal method provided by the invention is combined with flue gas desulfurization and denitrification provided by the invention of FGD, while improving the desulfurization, denitrification and mercury removal efficiency, and SO2 gas recycling.
【技术实现步骤摘要】
本专利技术涉及一种烟气净化装置及其方法,具体涉及。
技术介绍
燃煤烟气中的SO2和NOx所引起的酸雨和光化学烟雾等环境污染已成为影响人类生存环境的严重问题,而且重金属汞的污染控制也日益提上日程,随着近年来环保要求的提高,同时控制S02、NOx和汞排放的要求更加紧迫。相对于单独应用传统的脱硫、脱硝和除汞技术,联合脱硫脱硝脱汞技术在经济性、资源利用效率方面具有优势,我国燃煤污染日趋严重,大力发展低费用、高效率的燃煤污染防治技术是当务之急,因此具有费用低、结构紧凑等优点的联合脱硫脱硝脱汞技术受到越来越多的重视。活性焦烟气联合脱硫脱硝脱汞技术是一种先进的干法烟气联合脱硫脱硝脱汞技术,该技术脱硫脱硝脱汞效率高,脱除过程基本不消耗水,适合在我国缺水地区推广应用;脱除产物可资源化,能够在一定程度上缓解目前我国硫资源短缺的现状;采用的煤基吸附剂以我国储量相对丰富的煤炭为主要原料,原料供应有充足保证。因此,该技术是一种适合我国国情、高效且经济的燃煤烟气污染物联合控制技术。活性焦脱硫工艺原理是基于SO2在活性焦表面的吸附和催化作用,烟气中的SO2在HO 180°C的温度下,与烟气中氧气、水蒸汽发生反应化学反应生成硫酸吸附在活性焦孔隙内,反应式如下:2S02+02+2H20 — 2H2S04活性焦脱硝工艺原理是利用活性焦的催化特性,采用低温选择性催化还原反应(SCR)法,在烟气中配入少量NH3,促使NO发生选择性催化还原反应生成无害的N2直接排放,反应方程式如下:4N0+4NH3+02 — 4N2+6H20活性焦脱汞是利用活性焦表面的官能团及其孔隙结构使汞吸附在活性焦的孔隙中 ...
【技术保护点】
一种烟气联合脱硫脱硝脱汞装置,其特征在于:所述装置包括2个联合脱硫脱硝脱汞反应器,每个所述联合脱硫脱硝脱汞反应器均包括上下连通的脱硝脱汞反应器和脱硫脱汞反应器,所述脱硝脱汞反应器位于所述脱硫脱汞反应器的上部;所述脱硫脱汞反应器通过筛板分成并列的3个腔室,所述脱硫脱汞反应器之间通过进气室相连通,所述进气室上设有烟气入口,所述脱硝脱汞反应器之间通过出气室相连通,所述出气室上设有烟气出口,且所述进气室与出气室上下不连通;所述联合脱硫脱硝脱汞反应器的侧壁通过筛板与集气室相连接,所述集气室内设有喷NH3装置;所述联合脱硫脱硝脱汞反应器的顶部设有活性焦入口,其底部设有活性焦出口;所述活性焦出口与再生反应器相连通,所述再生反应器的出口与所述活性焦入口相连通。
【技术特征摘要】
【专利技术属性】
技术研发人员:孙仲超,熊银伍,梁大明,王鹏,李雪飞,董卫果,吴涛,李艳芳,肖宏生,傅翔,国晖,刘春兰,郭良元,
申请(专利权)人:煤炭科学研究总院,
类型:发明
国别省市:
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