大比例掺烧高炉煤气锅炉关键技术研究
Research on Key Technology of Large-ratio Blending Blast Furnace Gas Boiler
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摘要:
目前国内各大钢铁公司均在改扩建钢铁基地，为达到钢铁基地煤气零排放，自备电厂需最大限度的掺烧高炉煤气。以宝钢广东湛江钢铁基地项目自备电厂2×350 MW机组工程为依托项目，经过分析、计算和方案比较，开发出适应大比例掺烧高炉煤气的300 MW等级亚临界锅炉及配套的烟风、制粉和脱硫系统。工程自投运以来机组各项性能指标均达到或优于设计值。宝钢钢铁基地达到1 000万t生产能力时每台锅炉最大掺烧高炉煤气比为30%，为目前国内掺烧比例最大的项目。它的建成有利于解决环境污染问题，并且减少了能源消耗，降低钢铁公司自备电厂的成本。研究成果具有巨大的推广价值，对日后项目具有重大的借鉴意义。 Abstract:The situation of rebuilding and expanding iron and steel bases has been existed in domestic steel corps at present. The captive power plants need to maximize the blending of blast furnace gas in order to achieve near-zero-emission of BFG. The research is based on the Baosteel Guangdong Zhanjiang Iron and Steel Base Captive Power Plant 2×350 MW Units Project. Through analysis, calculation and comparison, the large-ratio blending BFG subcritical boiler of 300 MW grade has been developed, as well as corresponding system, such as flue gas system, pulverizing system and flue gas desulfurization system. The results show that the performance indexes of the unit have been equal to or better than the design values since the operation. The maximum blending BFG ratio of each boiler is 30% when Baosteel base reaches the production capacity of 10 million tons, which is the maximum ratio of blending BFG in China. It is built to solve the problem of environmental pollution, to reduce energy consumption and the cost of captive power plant of steel corps. Thus, the research has high application promotion value and provides significant guidance for future projects.
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