脱硫吸收塔设计说明书

zhanghaiyu

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2020-08-24

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盐城工学院本科生毕业设计说明书  2009
目    录
1 
绪论
..........................................................................................................................................................1
2 
总体方案论证
..........................................................................................................................................2
3.
脱硫塔总体设计
......................................................................................................................................3
3.1 
脱硫塔结构组成
...................................................................................................................................4
3.2 
脱硫塔主要结构参数确定
...................................................................................................................4
3.2.1 
浆液高
(a)...........................................................................................................................................4
3.2.2
烟气进口底部至浆液面距离
(c).......................................................................................................5
3.2.3 
烟气进出口高度
................................................................................................................................5
3.2.4 
烟气进口中心至第二层喷浆管距离
(b)...........................................................................................5
3.2.5 
最上层喷浆管至第一段除雾器高差
(d)...........................................................................................5
3.2.6 
除雾器冲洗水喷头距除雾器间距
( f ).............................................................................................5
3.2.7 
搅拌器设置高度
(h)...........................................................................................................................5
4 
喷浆部分设计
..........................................................................................................................................7
4.1 
喷浆管的设计
.......................................................................................................................................7
4.2 
喷头的选择
...........................................................................................................................................7
4.3 
喷浆管的支承
.......................................................................................................................................8
5 
除雾部分
..................................................................................................................................................9
5.1 
除雾器
...................................................................................................................................................9
5.2 
对除雾器的要求
...................................................................................................................................9
5.3 
除雾器的形式
.......................................................................................................................................8
6 
防腐
........................................................................................................................................................11
7 
制作
........................................................................................................................................................12
7.1 
底板的预制
.........................................................................................................................................12
7.2 
壁板的预制
.........................................................................................................................................13
7.3 
顶板预制
.............................................................................................................................................14
7.4 
构件预制
.............................................................................................................................................14
8 
安装
........................................................................................................................................................15
8.1 
大型机组吸收塔概况
.........................................................................................................................15
8.2 
安装工序
.............................................................................................................................................15
8.3 
基础划线、底板梁及底板安装
.........................................................................................................15
8.4 
吸收塔壁板及加强筋的安装
.............................................................................................................15
8.5 
变径段的安装
.....................................................................................................................................17
结论
...........................................................................................................................................................18
参考文献
...................................................................................................................................................19
致
  
谢
.........................................................................................................................................................20
附
    
录
.......................................................................................................................................................21
1

脱硫吸收塔设计

脱硫塔设计

摘要

考虑到对煤种及锅炉负荷的适应性、运行与维修的方便性、吸收剂的廉价性

和来源广范性、副产品具有的综合利用价值性

(

即使抛弃搁置也无二次污染

)

，在比

较了几种不同工艺的特性以及它们中国的实际应用情况之后，本文选择了顺应吸收

塔发展潮流的喷淋塔作为设计对象来实现石灰石－石膏湿法烟气脱硫。这套工艺采

用了脱硫、除尘和就地强制氧化同时完成的高性能化组合塔型。设计塔内烟气的流

速为

3 m/s

，液气比为

18 L/m3

，钙硫比为

1.04

。喷淋塔主体、除雾器和再喷淋

层依次垂直布置，这样塔的整体布局将会更加紧凑，占地面积较小。对于脱硫产物

石膏

则采取了回收与抛弃兼容的处理方法。塔内脱硫工作流程为：经释热降温后的

烟气自下而上的进入吸收塔的逆流段，与依靠重力降落的高密度循环喷淋液滴进行

高效接触，气液两相在空间完成传质和吸收的过程。然后洁净的烟气经过除雾器的

除雾和再热器的加热后从烟囱中被释放到大气当中去。吸收浆液在塔下部的氧化槽

中被氧化成石膏浆液，然后进入石膏浓缩脱水系统。

关键词：

湿法烟气脱硫，脱硫塔，石灰石－石膏法

Design of desulfurize tower

Abstract:Considering the adaptability to coal type and loads, the convenience of

operation and maintenance, the relatively cheap and easy-obtaining absorbent,the

comprehensive utilization of by-product (no secondary pollution, even abandoned

gypsum), after comparing different technical process features and the application situation

in China, the spray scrubber, which is the developing trend of absorption tower, is

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