炉内喷钙脱硫技术的工业应用研究

Industrial Applied Research of In-furnace Sorbent Injection-based Desulfurization Technology

介绍了两台 10t/h链条炉配套的脱硫工程和测试结果。脱硫系统包括结合四角旋涡燃烧技术的炉内喷钙和尾部利用文丘里喷嘴和麻石水膜除尘器对脱硫剂加湿活化两部分。测试结果表明 ,引入四角旋涡二次风技术可以在不影响锅炉运行的情况下明显改善脱硫剂在炉膛内的混合煅烧 ,有利于提高炉内脱硫效率 ;利用文丘里水喷嘴和除尘器 ,对未反应的氧化钙颗粒进行活化 ,提高脱硫反应速度 ,可以在较低钙与硫比下实现较高脱硫效率。对原配有文丘里水喷嘴和麻石水膜除尘器的工业锅炉进行脱硫环保改造时 。

Presented is a desulfurization project undertaken on two 10 t/h chain grate stokers along with some relevant test results. The desulfurization system comprises two parts: 1. The injection of sorbent into a furnace in conjunction with four-corner Vortex firing technology; and 2. The humidification and activation of desulfurization agents for a tail portion through the use of a Venturi nozzle and water-film dust collector. The test results indicate that the introduction of a four-corner vortex and secondary air techniques can markedly improve the mixed calcination of desulfurization agents in the furnace without affecting the boiler operation and is conducive to enhancing the desulfurization efficiency in the furnace. The use of Venturi water nozzle and a dust collector can lead to the activation of those calcium oxide particles, which have not undergone reaction, thus increasing the reaction speed of desulfurization. This makes it possible to realize a higher desulfurization efficiency at a relatively low Ca/S ratio. During the upgrading for environmental protection purposes of industrial boilers originally fitted with Venturi water nozzles and water-film dust collectors the technology of in-furnace sorbent injection with tail portion humidification and calcium oxide activation enjoys a significant technico-economic edge.