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电站高压加热器中的铜管由于给水 pH值的提高 ,容易造成腐蚀而使其寿命缩短。针对该问题 ,开展了用钢质螺旋槽管替代原有铜光滑管并使其达到原有换热性能的研究。以水蒸气 -水为介质的立式单管凝结换热实验的结果表明 ,钢质螺旋槽管的总传热系数比钢质光滑管提高 10 %～ 17% ,且钢质螺旋槽管高压加热器工业试验也表明 ,其总传热系数比铜光滑管高压加热器提高 8%。因此 ,可以采用钢质螺旋槽管替代高压加热器中的铜光滑管 ,实现锅炉给水系统无铜化运行的要求。
Due to the increase of the pH value of the feedwater, copper pipes in the high-voltage heater of the power station are likely to cause corrosion and shorten the service life. In response to this problem, the use of steel spiral groove tube to replace the original smooth copper tube and make it to the original heat transfer performance of the study. The experiment of vertical single-tube condensation heat transfer with steam-water as a medium shows that the total heat transfer coefficient of steel spiral tube is 10% -17% higher than that of steel smooth tube, and the high-pressure heating of steel spiral tube Industrial tests have also shown that the total heat transfer coefficient is 8% higher than copper smooth tube high pressure heaters. Therefore, the use of steel spiral groove tube can replace the high-pressure heater in the smooth copper pipe, boiler feed water system to achieve copper-free operation requirements.