Experimental Investigation on a 600 MWe Supercritical Boiler with the Technology of Less-Oil Ignition

Experimental studies were carried out on a 600 MWe supercritical boiler that was ignited by the technology of less-oil ignition. The variation of steam temperature and pressure, wall temperature of heat exchange surfaces and combustion status were investigated. Test results demonstrated that the pulverized coal is able to be combusted fully and stably in the less-oil ignition combustor, and the wall temperature of the combustor remains less than 300°C. It was also shown that the wall temperature of heat exchange surfaces is also not overheated, which expands uniformly, and the rising rate of the steam temperature and pressure satisfies the requirement of operation rules. In addition, compared to the cases using conventional ignition techniques, the economical benefit by employing the technology of less-oil ignition is pronounced.