摘要
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盐城工学院机本科生毕业设计说明书 2009
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
盐城工学院机本科生毕业设计说明书 2009
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 designed for CaCO
3
-CaCO
4
wet flue gas desulfurization in this paper. The
technology uses the high-performance integral spray scrubber, in which the function
of desulfurization, dedusting, and forced oxidation on the spot are possessed
simultaneously. The designed velocity of flue gas in countercurrent section is 3m/s.
The liquid/gas ratio is 18L/m3 and Ca/S ratio is 1.04.Spray tower, mist eliminator,
reheater are arranged one on top of another vertically, therefore the tower area layout
of it is more compact and the occupied land area is smaller. For the desulfurization
products,gypsum, the treatment of part being recovered and part being abandoned was
adopt. Working principle of it is that the flue gas flows upwards into the scrubber
countercurrent section after heat being released and temperature being lowered, reacts
with high-density circulating slurry drops downwards fallen by gravity, gas and slurry
two phases finish the process mass transferring and absorption reaction. Then the
clean flue gas passed through mist eliminator and reheater, and discharges to the lower
oxidation sump, and then enters gypsum concentration and dehydration system.
KEY WORDS:
wet flue gas desulfurization(WFGD), desulfurize tower, limestone-
gypsum technology
of 2
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