毕业设计---日产12000吨熟料水泥厂烧成系统工艺设计(窑尾).doc

摘要 本次的设计是设计日产12000吨水泥烧成系统窑尾工艺设计。烧成窑尾核心内容式预热器分解炉。从分解炉内的气流运动来看，可归纳为四种基本型式，即：涡旋式、喷腾式、悬浮式和流化床式。早期开发的分解炉，多以上述四种运动型式之一为基础，使生料和燃料分别依靠“涡旋效应”、“喷腾效应”、“悬浮效应”和“流态化效应”分散于热气流中，利用物料颗料之间在炉内流场中的相对运动，实现高度分散、均匀混合和分布、迅速换热，以达到提高燃烧效率，传热效率和入窑生料碳酸盐分解率的目的。 通过燃料、空气及生料的多级燃烧以达到降低废气中NOx气体含量的目的。影响NOx浓度的主要因素：主燃烧区温度、主燃烧区氧气浓度、主燃烧区氮气的浓度、气体在主燃烧区的停留时间、燃料中氮元素的含量等窑尾预热预分解系统采用单在线分解炉、双系列预热器的方案不仅极大地方便了系统参数的调节和控制，使系统操作易于平衡和优化，而且可使该系统投资额降低15％以上。系统分解炉采用专有技术，分解回转窑中产生的NOx气体，实现了低NOx的排放。该系统配置的分解炉设有低NOx分解段，实现系统的低NOx 关键字 预热器 分解炉 旋风筒 窑尾 Abstract The this design is the design nissan 12000 tons of cement firing system preheater process design. Firing end of the core content type preheater decomposition furnace. Decomposition furnace from the airflow movement to see, can be divided into four basic types, namely: the vortex type, spray those who type, suspension type and fluidized bed type. The early development of decomposing furnace, in the four movement type as the foundation, make one of raw material and fuel respectively depend on scroll effect, and spray effect, and who suspended effect and fluidized effect scattered in heat flow, the use of material between the makings of the flow field in the oven relative motion, realize a highly decentralized, mixing and distribution, rapid heat to improve combustion efficiency, heat transfer efficiency to kiln and raw decomposition rate of carbonate purpose. Force, the MSC design theory of decomposing furnace burner increased nitrogen and top three duct Through the air and fuel, the multistage raw order to reduce waste gas burning in the purpose of gas concentration NOx. The main factors of influence NOx concentration: the Lord, the Lord burning zone temperature combustion zone oxygen concentrations, the Lord of the whole area nitrogen gas concentration, in the Lord the retention time, fuel burning in the content of nitrogen element such as preheated preheater precalcining system by a single online decomposition furnace, double series preheater scheme not only greatl