CN201231130Y - 一种生产硫酸铵化肥的烟气脱硫装置 - Google Patents
一种生产硫酸铵化肥的烟气脱硫装置 Download PDFInfo
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Abstract
一种生产硫酸铵化肥的烟气脱硫装置，主要包括脱硫塔、二级喷淋系统、一级除沫器、增压风机、冲洗水管、氨水贮罐、氨水泵、氧化风机、氧化风管和与脱硫塔连接的一、二、三层循环泵、浆液泵、固液分离旋流器、离心机、干燥系统、包装系统、硫酸铵出口等，其特征是：一、二级喷淋系统是在一个水平面上交叉布置的，在二级喷淋系统的上方增加一个第三层喷淋系统；在一级除沫器的上方增加一个二级除沫器；在脱硫塔的上方直接安装一个直排烟囱；在固液分离旋流器、离心机与脱硫塔连接的循环管道上增加一个活性炭过滤装置；与氨水泵连接的输出氨水管路经过加氨混合器直接与氧化风管连接。使用本装置成本低、节能、环保。
Description
技术领域：
本实用新型涉及烧结烟气脱硫技术领域，特别是涉及一种生产脱硫副产品硫酸铵化肥的烟气脱硫装置。
背景技术：
在现有的烧结烟气脱硫工艺中，根据过程和副产物的不同，可分为氨一酸法、氨一亚硫酸铵法脱硫等工艺，但由于氨一酸法工艺需要消耗大量的硫酸，同时分解脱吸出来的二氧化硫气体须有配套的制酸系统处理，而氨一亚硫酸铵法工艺脱硫副产品为亚硫酸铵，该产品的使用效果也不好，因此，限制了氨一酸法、氨一亚硫酸铵法工艺在烟气脱硫领域的运用，但是，经过处理的副产品硫酸铵却可作为农用肥料使用，该产品具有广泛的应用前景。在现有的生产硫酸铵化肥的烟气脱硫装置中，主要有脱硫塔、氨水贮罐、氨水泵、浆液泵、循环泵、固液分离旋流器、离心机、增压风机、氧化风机、一层除沫器、二层喷淋及干燥系统、包装系统等组成，该装置存在的缺点是：1.由于除沫器工作的效率不高，烟气夹带液沫；2.吸收、氧化、结晶过程分别完成，设备、工艺复杂；3.在直接加氨喷淋中氨有逃逸现象发生，能耗增加；4.循环液中含有烟气带来的重金属、二噁英等有害物质，对生产的硫酸氨化肥的使用效果和环境保护带来负面的影响。
实用新型内容：
本实用新型的目的是提供一种设备、工艺简单、运行可靠，节能、环保并可生产硫酸铵化肥的烟气脱硫装置。
本实用新型的技术方案是提供一种用于生产硫酸铵化肥的烟气脱硫装置，主要包括脱硫塔、脱硫塔内部安装的氧化段搅拌器、二级喷淋系统、一级除沫器、烟气进口，与脱硫塔连接的冲洗水管、烟气进口前安装的增压风机、及相互连接的氨水贮罐、氨水泵、氧化风机、氧化风管，与脱硫塔连接的一、二、三层循环泵、浆液泵、与浆液泵依次连接的固液分离旋流器、离心机、干燥系统、包装系统、硫酸铵出口，其特征是：一、二级喷淋系统是在一个水平面上交叉布置的，在一、二级喷淋系统的上方增加第三层喷淋系统；在一级除沫器的上方增加一个二级除沫器；在脱硫塔的上方直接安装一个直排烟囱；在固液分离旋流器、离心机与脱硫塔连接的循环管道上增加活性炭过滤装置；与氨水泵连接的输出氨水管路经过加氨混合器直接与氧化风管连接。其特征还在于：一、二层喷淋系统和三层喷淋系统上下间距为1-2米；一级除沫器和二级除沫器的间距为1.5-1.7米；一级除沫器和二级除沫器前后都安装有喷淋水管，喷淋水管与除沫器之间距离为1.0-1.2米；在脱硫塔下部有一个氧化池，氧化池中下部安装有高效氧化布气管网。
本实用新型的实施效果是：由于增加了一级除沫器，并通过两级合理的布置进一步消除了烟气夹带的液沫，提高了除沫效率；由于脱硫塔顶部直接设有排烟筒，减少了设备成本和占地；由于选择在氧化风管中加氨并进入循环液，使得氨分布更均匀，提高了氨的利用率，而且比直接加氨喷淋有效的控制了氨的逃逸，节约了能源；由于在母液回流段增加一个过滤装置，减少或消除了Hg等重金属及二噁英等污染物，有效的避免了这些有害物质进入生产的硫酸铵化肥中，达到环境保护的要求。
附图说明：
图1是本实用新型实施例一种烟气脱硫装置的结构及工艺流程示意图
在附图中：1.脱硫塔；2.氧化段搅拌器；3.一层循环泵；4.二层循环泵；5.三层循环泵；6.浆液泵；7.活性炭过滤装置；8.固液分离旋流器；9.离心机；10.干燥系统；11.包装系统；12.硫酸铵出口；13.氧化风机；14.氧化风管；15.一、二层喷淋系统；16.增压风机；17.烟气进口；18.三层喷淋系统；19.冲洗水管；20.氨水泵；21.氨水贮罐；22.直排烟囱；23.二级除沫器；24.一级除沫器。
具体实施方式
下面结合附图进一步详细描述本实用新型实施例一种生产硫酸铵化肥的烟气脱硫装置，图1是本实用新型实施例的结构及工艺流程示意图，在图1中，脱硫塔1带有烟气进口17、冲洗水管19；烟气进口17签安装有增压风机16；脱硫塔1内平面交叉布置着一、二层喷淋系统15和三层喷淋系统18，一、二层喷淋系统15和三层喷淋系统18上下两层之间间距为1.2米；在一级除沫器24的上方增加一个二级除沫器23，一级除沫器24和二级除沫器23的间距为1.5米；一级除沫器24和二级除沫器23上方都安装有喷淋水管，喷淋水管与除沫器之间距离为1.0米；脱硫塔1上部直接安装有直排烟囱22；脱硫塔1下部有一个氧化池，氧化池上部安装有氧化段搅拌器2；氧化池中下部安装有高效氧化布气管网；氨水贮罐21的氨水输出管路经氨水泵20后经过加氨混合器与氧化风管14直接连接，在氧化风管14处安装有氧化风机13；与脱硫塔1下部氧化池出口分别连接有一、二、三层循环泵3、4、5和依次连接的浆液泵6、固液分离旋流器8、离心机9、干燥系统10、包装系统11、硫酸铵出口12；在固液分离旋流器8、离心机9与脱硫塔1连接的循环管道上安装有活性炭过滤装置7。
该装置的工作原理是：烧结机出口的高温烟气经过激冷降温后借助增压风机16作用通过烟气进口17自下而上流过脱硫塔1的喷淋吸收层15、18，与喷淋吸收液逆流接触，含硫烟气被浆液中水分充分饱和，进行脱硫反应并完成洗涤脱硫，处理后的烟气经除沫器23、24除沫后直接经脱硫塔1顶部的直排烟筒22排出，在脱硫塔1底部氧化池中的清液经一、二、三层循环泵3、4、5后回流到脱硫塔1的喷淋系统循环使用；氨水储罐21中的氨水经氨水泵20并通过加氨混合器后通过氧化风管14进入脱硫塔1中，高温烟气中的二氧化硫与氨水在喷淋吸收层反应生成亚硫酸铵溶液，亚硫酸铵在重力作用下，离开喷淋吸收段直接进入塔底氧化池，经氧化、结晶为硫酸铵，硫酸铵浆液从塔底流出，经浆液泵6后进入固液分离旋流器8、离心机9，经离心机9分离出的母液和清液通过活性碳过滤装置7除去Hg等重金属及二噁英等污染物后回收到脱硫塔1中再次循环使用；经离心机9分离后得到的固体硫铵浆液经干燥器系统10干燥后，在包装系统11进行包装，经硫酸氨出口12取出。
Claims (5)
1、一种生产硫酸铵化肥的烟气脱硫装置，主要包括脱硫塔(1)、脱硫塔(1)内部安装的氧化段搅拌器(2)、一、二级喷淋系统(15)、一级除沫器(24)、烟气进口(17)，与脱硫塔(1)连接的冲洗水管(19)、烟气进口(17)处安装的增压风机(16)、及相互连接的氨水贮罐(21)、氨水泵(20)、氧化风机(13)、氧化风管(14)，与脱硫塔(1)连接的一、二、三层循环泵(3、4、5)、浆液泵(6)、与浆液泵(6)依次连接的固液分离旋流器(8)、离心机(9)、干燥系统(10)、包装系统(11)、硫酸铵出口(12)，其特征是：一、二级喷淋系统(15)是在一个水平面上交叉布置的，在一、二级喷淋系统(15)的上方增加一个三层喷淋系统(18)；在一级除沫器(24)的上方增加一个二级除沫器(23)；在脱硫塔(1)的上方直接安装一个直排烟囱(22)；在固液分离旋流器(8)、离心机(9)与脱硫塔(1)连接的循环管道上增加活性炭过滤装置(7)；与氨水泵(20)连接的输出氨水管路经过加氨混合器直接与氧化风管(14)连接。
2、根据权利要求1所述一种生产硫酸铵化肥的烟气脱硫装置，其特征是：一、二层喷淋系统(15)和三层喷淋系统(18)上下两层之间的间距为1~2米。
3、根据权利要求1所述一种生产硫酸铵化肥的烟气脱硫装置，其特征是：一级除沫器(24)和二级除沫器(23)的间距为1.5-1.7米。
4、根据权利要求1所述一种生产硫酸铵化肥的烟气脱硫装置，其特征是：一级除沫器(24)和二级除沫器(23)前后都安装有喷淋水管，喷淋水管与除沫器之间距离为1.0-1.2米。
5、根据权利要求1所述一种生产硫酸铵化肥的烟气脱硫装置，其特征是：在脱硫塔(1)下部有一个氧化池，氧化池中下部安装有高效氧化布气管网。
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2008
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