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上海锅炉厂生产400吨/时再热锅炉已有9年历史。本文根据这些年来的实践经验,对各种再热汽温的调节方式,如汽—汽热交换器、烟气挡板、烟气再循环、喷水减温和变压运行等进行了分析,从而认为:燃油、气和优质烟煤的锅炉采用烟气再循环较为适宜;燃无烟煤、贫煤和劣质烟煤的锅炉采用喷水降温较为适宜。为了简化调温方式,今后还要逐步采用变压运行。
Shanghai Boiler Plant 400 tons / hour reheat boiler has been 9 years of history. Based on these years of practical experience, this paper analyzes various ways of reheat steam temperature regulation, such as steam-steam heat exchanger, flue gas damper, flue gas recirculation, water jet temperature reduction and transformer operation. It is considered that the flue gas recirculation is more suitable for the boilers of fuel, gas and high-quality bituminous coal, and it is more appropriate to use the jet water to cool the boilers burning anthracite, lean coal and inferior bituminous coal. In order to simplify the temperature control mode, we should gradually adopt the transformer operation in the future.