【作者】 焦有宙；

【导师】 张全国；

【作者基本信息】 河南农业大学 ， 农业生物环境与能源工程， 2001， 硕士

【摘要】 燃煤电厂排放大量粉煤灰已对生态环境形成严重的威害，粉煤灰的资源化程度不高又造成了资源极大的浪费。因此开发粉煤灰资源化新技术，提高粉煤灰资源化水平成为我们面临的艰巨任务。 本研究是在目前国内第一台粉煤灰高压静电分离中试装置基础上开展的，首先对粉煤灰颗粒摩擦荷电机理，摩擦带电状况及进行电选的可行性进行研究；其次对摩擦带电器进行研究，确定不同材质，如钢、铜、铁，铝等摩擦材料对粉煤灰颗粒荷电的影响；运用流体力学理论及电场理论分析和计算了粉煤灰颗粒在高压电场中的运动规律；然后进行粉煤灰脱炭系统工况参数的优化试验，确定出电压、极板间距、摩擦材料、粉尘浓度对系统结果的影响，优化粉煤灰电分离脱炭装置工况参数；最后运用技术经济评价方法对此项装置和技术进行了评价。研究证明粉煤灰电分离脱炭装置从技术层面上是可行得，装置运行试验能将粉煤灰含炭量从9.5％降为3.2％，脱炭率为64.64％，产率为38.86％，本装置及技术对粉煤灰资源化中的减量化问题有一定程度的解决，同时经济效益比较高，符合粉煤灰资源化的原则。更多还原

【Abstract】 Mass fly ash produced by coal combustion power plants has polluted environment and wasted resource because of low level of resourceful utilization. We are faced with arduous task to put forward new technology and improve the level of resourceful utilization of fly ash.This research based on fly-ash static electric doffing charcoal experimental installation firstly set up in our country has been made. We firstly made research on mechanism of fly-ash grain friction producing electronics, Condition of friction producing electronic and probability of electrical separation. Secondly, we made sure the influence of different material by studying friction tape, such as steel, copper, aluminum, and iron. We analyzed and calculated motion regularity of fly-ash grain in high-voltage static electric field using fluid mechanics and electric field theory. Then we made optimization experiment of working conditions parameter of doffing charcoal system, concluded the influence of voltage 50pole-late interspaces > friction material^soot and dust concentration, optimized working condition parameter of fly-ash doffing charcoal experimental installation. Finally, we evaluated this installation and technology using economic and technological methods.Study shows that, fly ash doffing charcoal experimental installation is technologically practicable. Running test installation shows the percentage of charcoal drops from 9.5% to 3.2%, the doffing-charcoal rate of original fly ash can achieve 64.64%, the productivity can achieve 38.86%. This installation and technology can solve the problem of reduction volume in course of fly-ash resourceful utilization; at the same time has high economic benefit in line with the principle of fly-ash resourceful utilization.更多还原