摘要：本设计为环形加热炉，其优点是可以在长宽比较小的厂房内安装使用，料坯放在转动的炉底上进行加热，出料方式为侧出料。首先要进行燃料燃烧计算，因为已知条件的燃料成分有问题要进行换算；进一步算出金属加热时间并确定炉长和中径；随后利用热平衡算出燃料消耗量；最后是换热器、烧嘴、管道、烟囱的选用和设计。大部分参数都是需要查表或者查图来确定，而查表的数据之间关联性很大，所以会需要花大量时间去修改。燃料燃烧和热平衡定稿后剩下的就是需要参考一些书籍的设计和设备的选用，如鼓风机、烟道的设计等等。70041

毕业论文关键词：环形加热炉；燃料燃烧；热平衡；换热器；烟囱

Design of 35t / h Ring Furnace

Abstract: This design is an annular heating furnace, which has the advantage that it can be installed in the relatively small length and width of the plant, the blank placed on the bottom of the heating on the bottom of the heating, the way out for the material. The fuel heating is calculated first, because the fuel composition of the known condition is to be converted, and the furnace heating time is further calculated and the furnace length and the medium diameter are determined. Then, the fuel consumption is calculated by the heat balance. Finally, the heat exchanger, Pipe, chimney selection and design.Most of the parameters are required to look up the table or check to determine, and check the data between the table is very large, so it will take a lot of time to modify. Fuel burns and heat balance after the final is the need to refer to some of the books of the design and equipment selection, such as blowers, flue design and so on.

Keywords: toroidal heating furnace,；fuel combustion,；heat balance；heat exchanger；chimney

目录

摘要…Ι

AbstractΙ

目录 …II

1 已知条件和设计的基本内容 1

1.1 已知条件： 1

1.2 设计内容： 1

1.3 课题的意义： 1

1.4 发展趋势： 2

2 燃料燃烧 3

2.1 燃料换算 3

2.2 空气理论和实际需要量 4

2.3 燃烧产物参数 4

2.4 燃烧温度的计算 6

2.5 钢坯数和出钢间隔 7

3 金属加热计算 9

3.1 环形炉的热工制度 9

3.2 综合传热系数计算 9

3.3 金属加热时间计算和炉长计算 14

3.3.1 预热段计算 14

3.3.2 加热段计算 16

3.3.3 均热时间计算 18

3.4 环形炉炉长和各段长度 19

4 热平衡 22

4.1 热收入： 22

4.1.1 Q1燃料燃烧化学热： 22

4.1.2 Q2预热空气带入物理热： 22

4.1.3 Q3金属氧化反应的化学热量： 22

4.2 热支出： 23

4.2.1 Q1`加热燃料需要的热量 23

4.2.2 Q2`出炉烟气带走热量