论文部分内容阅读
对于大容量机组,喷水减温器是锅炉的主要调温部件及重要的承压部件,保证其安全、可靠运行,对整台锅炉的安全、经济运行,特别是对承压集箱、受热面管材的寿命管理具有十分重要的意义。由于喷水减温器在喷射减温水时温差较大,喷水量又需要不断调节变化,其各部件极易产生局部或全部较大的温差应力,特别是在喷头、喷水管孔、疏水管等管孔附近区域,更易形成交变的温差应力,进而产生热疲劳裂纹,造成喷水减温器或其部件的损坏,影响整个火力发电机组的安全和经济运行。
For large-capacity units, water jet desuperheater is the main part of the boiler thermostat components and important pressure components, to ensure its safe and reliable operation of the entire boiler safe and economical operation, especially on the pressure header, heated Pipe life management is of great significance. As the water jet desuperheater temperature drop when the water temperature is larger, the amount of water and need to constantly adjust for changes in its various parts can easily produce large temperature stress or large part of the whole, especially in the nozzle, water pipe holes, hydrophobic Pipes and other pipe near the hole, the more likely to form alternating temperature stress, resulting in thermal fatigue cracks, causing damage to the water jet or its components, affecting the safety of the entire thermal power generating units and economic operation.