毕业设计--日产5000吨熟料水泥厂新型干法窑尾烧成系统工艺设计

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1、日产 5000 吨水泥熟料水泥厂新型干法窑尾烧成系统工艺设计 I 摘要摘要 本次设计的任务是 5000t/d 水泥熟料新型干法生产线烧成系统窑尾工艺 设计。预热器主要分为四级预热器和五级旋风预热器两种：其主要区别在于 第一级预热器出口废气温度、废气量以个水泥生产线的耗煤量。根据国内新型干 法水泥生产的情况，窑尾烟气量可达 1.5-1.9 Nm 3/kg（煤粉燃烧后产生的理论烟 气量为 0.8-1.2 Nm 3/kg 、0.2-0.4 Nm3/kg 的漏风、过剩空气、盐类分解、自由 水蒸发、高岭土脱水、空气带入含湿量等）。四级预热器窑由于少了一级预热故 本次设计选用五级悬浮预热器。器，其漏风量比

2、五级预及整热器窑有所减少，窑 尾预热器烟气量也对应减少。四级预热器但同时四级预热器增加了煤耗，增加煤 耗量与增加发电量之比远远大于国家公布的火电标准煤耗表明， 四级预热器窑的 能源利用效率比五级预热器窑低。 五级预热器窑投资虽然有所增加， 发电量减少； 但煤耗量的减少更为明显， 其运行时的经济效益和环境效益明显大于四级预热器 窑。 关键词关键词：烧成系统，预热器，分解炉，物料平衡 II ABSTRACT This design is the task of 5000 t/d NSP cement clinker production line firing system preheater p

3、rocess design. Preheater mainly divided into level 4 preheater and category five cyclone preheater two kinds: the main difference between the first level preheater export waste gas, waste gas temperature by a quantity of cement production line HaoMeiLiang. According to domestic NSP cement production

4、, smoke gas inlet up to 1.5-1.9 N m3 / kg (pulverized coal burning after the theory of gas produced smoke for 0.8 1.2 N m3 / kg, 0.2 0.4N m3 / kg air leakage, the excess air, salt decomposition, free water evaporation, kaolin dehydration, air into the moisture content, etc.). Level 4 preheater kiln

5、due to the level 1 preheat so the less design choose a category five suspension preheater. Implement, the leakage air volume gets than a category five and the heat exchanger kiln inlet preheater decreased, but also corresponding to reduce gas smoke. Level 4 preheater but at the same time level 4 pre

6、heater increased coal consumption, increase the amount and increase the capacity of the coal consumption than far greater than national publication of the thermal power standard that level 4 preheater coal kiln energy efficiency than category five preheater kiln low. A category five preheater kiln investment increased capacity, although reduce; But the amount of coal consumption reduce is more apparent, its runtime economic benefits and environmental benefits significantly greater than level 4