The utility model discloses a device for incinerating arsenic-containing flue gas, which comprises a ceramic tube dust collector, a liquid nitrogen bottle, a mixing chamber and an electrostatic precipitator; an air inlet is arranged on the ceramic tube dust collector, an ash discharge outlet is arranged on the bottom of the ceramic tube dust collector, an outlet of the ceramic tube dust collector is connected with the bottom of the mixing chamber, a liquid nitrogen bottle is connected with the liquid nitrogen inlet of the upper part of the mixing chamber through a valve, and an upper part of the mixing chamber. The outlet is connected with the electrostatic precipitator, an exhaust port is arranged on the electrostatic precipitator, and a discharge outlet is arranged at the bottom of the mixing chamber. The device uses liquid nitrogen vaporization to absorb a large amount of heat and quickly transit through the curing range of amorphous arsenic trioxide, so as to maximize the crystalline arsenic trioxide. The liquid nitrogen entering the flue gas does not react with the gas component and does not change the chemical properties of the gas component. Using electricity to collect arsenic, only removing arsenic is carried out; the whole process has no use of water, which greatly reduces the water consumption and the cost of subsequent water treatment, as well as the production of industrial arsenic trioxide products, and improves the environmental and social benefits.
【技术实现步骤摘要】
一种焚烧含砷烟气的处理装置
本技术涉及一种焚烧含砷烟气的处理装置,属于环境工程
技术介绍
为贯彻落实党中央提出的《关于加快推进生态文明的意见》,广西环江毛南族自治县农业局引进了蜈蚣草种植技术,蜈蚣草在生长过程中快速萃取、浓缩和富集土壤中的砷,通过定期收割蜈蚣草去除土壤中的砷,来实现修复土壤的目的。经农业局的介绍,蜈蚣草会进行焚烧处理,烟气采用“急冷+湿法除尘+布袋除尘”装置处理;灰渣中含有高浓度的砷,按照危险废物进行填埋处理。焚烧温度不高是造成灰渣中含有高浓度的砷的重要原因。通常焚烧后的砷以三氧化二砷形式存在,而三氧化二砷的升华温度为313℃,故蜈蚣草在高于313℃的燃烧氛围中会大大降低灰渣中砷含量。同时,焚烧烟气中的砷含量会增加。关于含砷烟气的处理,国内外一直在进行研究。德国Lurgi提出了湿法除砷工艺,将专利DE19823227063和DE3514471应用在了处理铜冶炼烟气湿法除砷中;山东恒邦冶炼股份有限公司提出了骤冷除砷工艺,将CN105536475A和CN205360870U应用在了处理冶金行业高砷矿高温烟气;中国恩菲工程技术有限公司提出了骤冷 ...
【技术保护点】
1.一种焚烧含砷烟气的处理装置,其特征在于:包括陶瓷管除尘器(2)、液氮瓶(3)、混合室(4)、电除尘器(5);陶瓷管除尘器上设置有进气口(1),陶瓷管除尘器底部设置有卸灰口,陶瓷管除尘器出口与混合室(4)底部连通,液氮瓶(3)通过阀门与混合室(4)上部的液氮入口连通,混合室(4)上部出口与电除尘器连通,电除尘器上设置有排气口,混合室(4)底部设置有卸料口。
【技术特征摘要】
1.一种焚烧含砷烟气的处理装置,其特征在于:包括陶瓷管除尘器(2)、液氮瓶(3)、混合室(4)、电除尘器(5);陶瓷管除尘器上设置有进气口(1),陶瓷管除尘器底部设置有卸灰口,陶瓷管除尘器出口与混合室(4)底部连通,液氮瓶(3)通过阀门与混合室(4)上部的液氮入...
【专利技术属性】
技术研发人员:孙鑫,郝星光,宁平,李凯,王驰,
申请(专利权)人:昆明理工大学,
类型:新型
国别省市:云南,53
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