锅炉清洗的必要性及行业标准是什么?

锅炉为我们生活供暖提供了很大的帮助,但是再好的锅炉也需要好好保养清洗,那么,对锅炉清洗有什么必要性呢?应该达到什么样的标准呢?

一、锅炉清洗的必要性

目前新建锅炉在运行前都应进行化学清洗,以清除设备在制造加工过程中形成的高温氧化轧皮和带硅氧化皮,以及在存放、运输、安装过程中所产生的腐蚀产物、焊渣带入的泥沙、油脂涂层、污染物等。实践证明,新建锅炉如启动前不进行化学清洗,水、汽系统内的各种杂质和附着物在锅炉投运后会产生以下危害。

1、直接妨碍管壁的传热或导致水垢的产生,使炉管金属过热和损坏,缩短锅炉的使用寿命。
Directly impede heat transfer wall or cause the generation of scale, so that the metal tube overheating and damage and shorten the life of the boiler.
2、促使锅炉在运行中发生沉积物的腐蚀,致使炉管变薄、穿孔而引起爆管。
Promote corrosion deposits occur in the operation of the boiler, resulting in tube thinning and perforation caused by burst pipes.
3、在炉水中形成碎片和沉渣,从而引起炉管堵塞或破坏正常的汽、水流动的工艺。
In the formation of debris and sediment in water heaters, causing the furnace tube blockage or disruption of normal gas, water flow processes.
4、使炉水的含硅量、含铁量等水质指标长期不合格,延长了机组的启动时间,危害汽轮机的正常运行。相反,新建锅炉启动前进行化学清洗,不仅有利于锅炉的安全运行,还能够改善锅炉启动阶段的水汽质量,使之较快达到正常标准,从而大大缩短机组启动到正常运行时间。
The furnace silicon content of water, iron and other water quality indicators of long-term failure to extend the unit's startup time and endanger the normal operation of the turbine. Instead, the new boiler starts before chemical cleaning, not only conducive to the safe operation of the boiler, but also can improve the quality of boiler start-up phase of water vapor, so that faster to reach the normal standard, thus greatly reducing the unit starts to uptime.
二、锅炉清洗质量指标

1、清洗后的金属表面应清洁,基本上无残留氧化物和焊渣,无明显金属粗晶析出的过洗现象,不应有镀铜现象。
After cleaning the metal surface should be clean, essentially no residual oxides and welding slag, no significant precipitation is too coarse-grained metal wash phenomenon, there should be no copper phenomenon.
2、用腐蚀指示电测量的金属平均腐蚀速度应小于8g/(m2h)。腐蚀总量应小于80g/m2,除垢率不小于90%的合格,除垢率不小于95%为优良。
With electrical measurements of metal corrosion indicates the average corrosion rate should be less than 8g / (m2h). Should be less than the total amount of corrosion 80g/m2, descaling rate of not less than 90% of the qualified,descaling rate of not less than 95% of the fine.
3、清洗后的金属表面应形成良好的钝化保护膜,不应出现二次锈蚀和点蚀。
After cleaning the metal surface passivation should form a good protective film, there should not be a secondary corrosion and pitting.
4、固定设备上的阀门、仪表等不应受到损伤。
Fixed equipment on the valves, meters, etc. should not be damaged.

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