The invention discloses a combined desulfurization, denitration and mercury removal device and a method thereof. The device comprises a mercury removal reactor and desulfurization denitration and mercury removal reactor; flue gas desulfurization reactor entrance with mercury removal on the side wall of the side wall is provided with flue gas entrance relative to the mercury removal reactor through the sieve plate and the gas collecting chamber a connected to the top of the desulfurization reactor with mercury removal mercury removal desulfurization reactor of activated coke desulfurization entrance, the bottom is provided with a mercury removal reactor of activated coke flue gas outlet outlet; a side wall denitration and mercury removal on the top of the reactor; denitrification and mercury removal reactor with denitrification and mercury removal reactor of activated coke entrance, the bottom is provided with a denitrification and mercury removal reactor the activated coke exports; denitrification and mercury removal reactor of activated coke desulfurization reactor outlet and the mercury removal by activated coke desulfurization entrance is communicated with the mercury removal reactor of activated coke export and regeneration reactor connected. The method of removing mercury in flue gas with the invention provides the use of flue gas desulfurization and denitrification combined with the desulfurization denitration and mercury removal device, and improve 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】
一种联合脱硫脱硝脱汞装置,包括脱硫脱汞反应器和脱硝脱汞反应器;其特征在于:所述脱硫脱汞反应器的侧壁上设有烟气入口,与设置烟气入口相对的所述脱硫脱汞反应器的侧壁通过筛板与集气室a相连接,所述集气室a内设有喷NH3装置,所述脱硫脱汞反应器的顶部设有脱硫脱汞反应器活性焦入口,其底部设有脱硫脱汞反应器活性焦出口;所述脱硝脱汞反应器的侧壁上设有烟气出口,且所述脱硝脱汞反应器的一个侧壁通过筛板与集气室b相连接,所述集气室a与所述集气室b相连通;所述脱硝脱汞反应器的顶部设有脱硝脱汞反应器活性焦入口,其底部设有脱硝脱汞反应器活性焦出口;所述脱硝脱汞反应器活性焦出口与所述脱硫脱汞反应器活性焦入口相连通,所述脱硫脱汞反应器活性焦出口与再生反应器相连通,所述再生反应器的出口分别与所述脱硫脱汞反应器活性焦入口和脱硝脱汞反应器活性焦入口相连通。
【技术特征摘要】
【专利技术属性】
技术研发人员:熊银伍,孙仲超,王鹏,梁大明,李雪飞,吴涛,李艳芳,肖宏生,郭良元,国晖,傅翔,刘春兰,
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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