The utility model discloses a system for removing sulfur trioxide from flue gas by alkali reagent, including a reactor. The upper part of the reactor is provided with a first flue, the first flue is vertically downward connected with the second flue after bending from the top, and the connection between the second flue and the first flue is at a right angle. The second flue is also provided with an alkali reagent injection system, and the alkali reagent is connected with the second flue. The spraying system includes a storage bin. The lower part of the storage bin is provided with a screw feeder with a metering device. The screw feeder with a metering device is connected with a pneumatic feeding pipe through a pipeline. One end of the pneumatic feeding pipe is connected with a dilute ammonia pipe. The dilute ammonia pipe is connected with an ammonia spraying grid in the flue. The ammonia spraying grid is evenly arranged in the flue, in which the belt is uniformly arranged. A compressed air pneumatic conveying device is also arranged on the pipeline between the screw feeder of the metering device and the pneumatic conveying inlet pipe, and a plurality of nozzles are connected at the other end, and the nozzles are installed in the main pipe of the ammonia-spraying grille. There is also a guide vane at the connection between the second flue and the first flue. Compared with the existing technology, the system can make the alkali reagent and ammonia spray into the flue through the ammonia grid uniformly, and mix well with the flue gas. It can not only remove SO3 before the reactor, but also remove sulfur trioxide converted by the catalyst in the reactor. It has good removal effect and reduces pollution, and can effectively prevent air preheater blockage.
【技术实现步骤摘要】
一种碱试剂脱除烟气中三氧化硫的系统
本技术涉及一种碱试剂脱除烟气中三氧化硫的系统。
技术介绍
火力发电是目前我国最为主要的发电形式。燃煤中含有一定量的硫元素,在煤燃烧过程中会产生大量的气态污染物,污染物以硫化物和氮氧化物最为严重。现有技术中在烟气进入空气预热器之前并不对烟气中的SO3进行处理。三氧化硫会与氨气和水蒸气发生反应,生成硫酸氢铵和硫酸,在空预器处沉积,造成空气预热器堵塞,增加烟道阻力,增加引风机功率消耗等问题,导致电厂能耗升高并影响燃煤机组的正常运行。因此,如何提供一种脱硫效果好、降低污染的碱试剂脱除烟气中三氧化硫的系统,是本技术要决解的技术问题。
技术实现思路
针对现有技术的上述缺陷和问题,本技术目的是提供了一种脱硫效果好、降低污染的碱试剂脱除烟气中三氧化硫的系统。为了达到上述目的,本技术提供如下技术方案一种碱试剂脱除烟气中三氧化硫的系统,包括反应器,所述反应器的上部设有第一烟道,所述第一烟道从顶部折弯后垂直向下后与第二烟道连接,所述第二烟道与第一烟道连接处为直角,其中,所述第二烟道处还设有碱试剂喷射系统,所述碱试剂喷射系统包括储仓,所述储仓的下部设有带计量器的螺旋给料机,所述带计量器的螺旋给料机通过管道与气力输送进管,所述气力输送进管的一端与稀氮气罐连接,其中,所述带计量器的螺旋给料机与气力输送进管之间的管道上还设有压缩空气气力输送装置,另一端连接有多个喷射嘴,并将喷射嘴安装在喷氨格栅主管道内,所述第二烟道与第一烟道连接处还有导流片。进一步,所述储仓的底部设有出料口,顶部设有进料口,所述出料口还设有阀门。进一步,所述进料口还设有盖体,所述盖体的一端通 ...
【技术保护点】
1.一种碱试剂脱除烟气中三氧化硫的系统,包括反应器,所述反应器的上部设有第一烟道,所述第一烟道从顶部折弯后垂直向下后与第二烟道连接,所述第二烟道与第一烟道连接处为直角,其中,所述第二烟道处还设有碱试剂喷射系统,所述碱试剂喷射系统包括储仓,所述储仓的下部设有带计量器的螺旋给料机,所述带计量器的螺旋给料机通过管道与气力输送进管,所述气力输送进管的一端与稀氨气管连接,其中,所述带计量器的螺旋给料机与气力输送进管之间的管道上还设有压缩空气气力输送装置,另一端连接有多个喷射嘴,并将喷射嘴安装在喷氨格栅主管道内,所述第二烟道与第一烟道连接处还有导流片。
【技术特征摘要】
1.一种碱试剂脱除烟气中三氧化硫的系统,包括反应器,所述反应器的上部设有第一烟道,所述第一烟道从顶部折弯后垂直向下后与第二烟道连接,所述第二烟道与第一烟道连接处为直角,其中,所述第二烟道处还设有碱试剂喷射系统,所述碱试剂喷射系统包括储仓,所述储仓的下部设有带计量器的螺旋给料机,所述带计量器的螺旋给料机通过管道与气力输送进管,所述气力输送进管的一端与稀氨气管连接,其中,所述带计量器的螺旋给料机与气力输送进管之间的管道上还设...
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。