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The Integrated FGD and Dust Removal Technology

机译：集成的烟气脱硫除尘技术

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The integrated technology of limestone injection and wet FGD, which is called LIFAC technology abroad, can optimize limestone injection conditions. Sulfur retention is made by chemical reaction between high reactive CaO produced in furnace and SO_2 from flue gas while the unreacted CaO is sprayed to wet into Ca(OH)_2 at tail of boiler and react with SO_2 at the temperature of exit gas. This process can obtain higher rate of sulfur capturing and lime-base absorbent utilization. The system rate of sulfur capturing is mainly based on the amount of water added. But if the system temperature is near to dew-point temperature, water drop will be carried with flue gas, that is harmful to safe operation of dust handling equipment and IDF, etc. Because of the limitation of the amount of added water, the rate of sulfur capturing to the system is high. For several Five-Year-Pi an research, double-swirling impact and swirling tower plate desulfurizition technology combining with demisting and dust removal Harbin Power System Engineering & Research Institute (CHPI) develops technology. It not only gets higher efficiency of desulfurizition, but also integrates efficient desulfurizition with efficient dust removal. In addition, it simplifies boiler flue gas cleaning system, effectively minimizes occupied area and saves desulfurizition and dust removal cost with a splendid development future in China. By industrial demonstration at a 20t/h grate-fired boiler, the rate of sulfur capturing of the system is more than 85% when Ca/S is less than 1.5. At present, this technology has been applied to FGD retrofitting project at Shanghai City, Jiangsu Province and Guizhou Province, etc. Its operation has no side-affect on boiler performance. By analyzing on engineering economy, its operating cost is 745.45RMB and 941.82RMB disposal cost for removing one ton of SO_2.
机译：石灰石注入和湿法烟气脱硫的集成技术在国外被称为LIFAC技术，可以优化石灰石注入条件。硫的保留是通过在炉中产生的高反应性CaO与烟道气中的SO_2之间进行化学反应而进行的，而未反应的CaO则在锅炉尾部喷入湿润的Ca（OH）_2中，并在出口温度下与SO_2反应。此过程可以获得更高的硫捕获率和石灰基吸收剂利用率。硫的捕集系统速率主要基于添加的水量。但是，如果系统温度接近露点温度，烟道水会带走水滴，这对粉尘处理设备和IDF等的安全运行是有害的。由于加水量的限制，因此系统中硫的捕集率很高。哈尔滨电力系统工程研究院（CHPI）针对这项技术进行了多项研究，将双旋流冲击和涡旋塔板脱硫技术与除尘和除尘相结合。它不仅获得更高的脱硫效率，而且将有效的脱硫与有效的除尘相结合。此外，它简化了锅炉烟气清洁系统，有效地减少了占地面积，并节省了脱硫和除尘成本，在中国发展前景广阔。通过在20t / h炉排锅炉上进行工业演示，当Ca / S小于1.5时，系统的硫捕获率超过85％。目前，该技术已应用于上海市，江苏省和贵州省的烟气脱硫改造项目，其运行对锅炉性能没有任何影响。通过工程经济分析，去除一吨SO_2的运行成本为745.45元，处置成本为941.82元。

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