低费用烟气净化新技术

我国控制大气污染的主要任务是减少烧煤的SO_2和NO_x的排放。为减少我国SO_2排放和在2000年把SO_2的年排放量控制在1995年水平,需要做很大的努力和综合治理。应该在燃烧前对原煤进行洗选,以脱除所含的黄铁矿;采用掺有脱硫剂的型煤和增设能脱硫的循环流化床锅炉,易于实现且能更大量减少SO_2排放的是在烧煤发电厂装设烟气脱硫装置。为了减少烧煤设备的烟气脱硫装置的投资和运行费用,应开发新型的低费用脱硫(SO_2)和脱硝(NO_x)技术,例如烟气脱硫剂内循环技术和各种低NO_x煤粉燃烧技术。

NEW TECHNOLOGY OF FLUE GAS PURIFICATION AT LOW COST

The main task to control air pollution in China is reducing SO2 and NO, emission. In order to reduce SO2 emission and to control the SO2 emission in the year 2000 as the same level as in 1995, it is necessary to make great effort and to tackle in a comprehensive way. The following measures should be used; washing and sieving raw coals before combustion to reduce the pyrite content in coal; using coal briquettes with sulphur-fixation sorbent; using circulating fluidized bed boilers; installation of flue gas desulphurization system in coal-fired power station - it is relatively easier to be realized to reduce SO2 emission a lot. It is important to lower the investment for installation of flue gas desulphurization system and its operation fee. It is urgent task in China to develop new technologies of low-cost desulphurization and de-NOx processes, for example, the flue gas sorbent inner circulating desulphurization and the low-NOx pulverized-coal combustion technologies.