The invention discloses a purifying device for the removal of mercury and dioxin in a cement kiln before the fly ash kiln, including a plasma reactor and a nano ceramic adsorption device. The flue gas in the preheater enters the plasma reactor through the intake port, and uses the oxygen free radicals produced by the low temperature plasma to oxidize the atomic mercury (Hg0) into the gaseous mercury oxide (Hg2+), and the high energy electrons produced by the low temperature plasma are used to bombardment of dioxin molecules and make them break into non-toxic or low toxic small molecular substances. The outlet of the plasma reactor is connected to the air draught machine, the junction is set up and the pressure monitoring point is set up. Under the action of the fan, the flue gas enters the nano ceramic adsorption device. The gaseous mercury oxide (Hg2+) and some small molecular substances produced by the plasma reactor are adsorbed on the nano ceramic honeycomb plate, and the flue gas is finally finished. Direct discharge through the vent. The purification device of the invention can treat mercury and dioxin in the fly ash harmlessly before the cement kiln, with high efficiency, low energy consumption, simple structure, strong applicability and low operating cost.
【技术实现步骤摘要】
一种水泥窑协同处置飞灰窑前脱除汞和二噁英的净化装置
本专利技术属于环境保护领域,公开涉及水泥窑在协同处置飞灰过程中窑前脱除汞和二噁英的净化装置,具体涉及基于低温等离子体—纳米陶瓷耦合技术对多种污染物协同控制去除装置和方法。
技术介绍
随着工业迅速发展和能源消耗量的不断增长,水泥行业作为我国的基础工业,得到了巨大的发展,其也被国际社会公认为消纳各种废物及固化有害物质的有效途径,在国内利用飞灰烧制水泥已经实现工业化,但飞灰中含有大量的重金属汞和二噁英等污染物,由于汞的挥发、冷凝温度低(357℃),飞灰中的汞在预热器中几乎全部挥发,以汞蒸气的形式停留在废气中,极少进入水泥窑内或随熟料带出窑炉系统,烟气冷却后大多数汞再次富集在飞灰颗粒的表面。飞灰中的汞一般有三种存在形态,即原子态汞(Hg0)、气态氧化汞(Hg2+)和颗粒态汞(Hgp)。不同形态的汞物理、化学性质差异较大,如气态氧化汞(Hg2+)易溶于水,并且易被烟气中的颗粒物吸附,因此易被湿法脱硫和常规除尘设备分离。颗粒态汞(Hgp)也易被除尘器分离,并且在大气中停留时间较短。相反由于原子态汞(Hg0)不溶于水,脱硫和除 ...
【技术保护点】
1.一种水泥窑协同处置飞灰窑前脱除汞和二噁英的净化装置,其特征在于:包括等离子反应器(1)和纳米陶瓷吸附装置(5),两段装置由引风机连接;等离子体反应器(1)内安装有等离子处理单元和等离子体电源(2),纳米陶瓷吸附装置(5)内安装有“W”形式的纳米陶瓷蜂窝板(5)。
【技术特征摘要】
1.一种水泥窑协同处置飞灰窑前脱除汞和二噁英的净化装置,其特征在于:包括等离子反应器(1)和纳米陶瓷吸附装置(5),两段装置由引风机连接;等离子体反应器(1)内安装有等离子处理单元和等离子体电源(2),纳米陶瓷吸附装置(5)内安装有“W”形式的纳米陶瓷蜂窝板(5)。2.根据权利要求1所述的装置,其特征在于:低温等离子体耦合纳米陶瓷协同处理飞灰中...
【专利技术属性】
技术研发人员:竹涛,张星,边文璟,
申请(专利权)人:中国矿业大学北京,
类型:发明
国别省市:北京,11
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