The effect of the chloride ion content on the boiler
Chlorine ion in boiler water furnace is a common water quality index. The lower the chloride ion content in the water, the better, otherwise the stable operation of the boiler will be seriously affected. At the same time, because the chloride ion in the boiler operation is relatively stable, not volatile, and will not be solid phase precipitation, so the ratio of the chloride ion content is commonly used to indicate the concentration rate of the pot water, to guide the boiler sewage discharge. This paper briefly describes the influence of the chloride ion content on the boiler.
Chloride ion has a high polarity, can promote corrosion reaction, and has a strong penetration, easy to penetrate the protective film of the metal surface, resulting in cracks and cavitation and other local corrosion. In particular, the stress corrosion cracking caused by austenitic stainless steel is great, which can make the heat exchanger leak in a short time. Therefore, the chloride ion content has a great influence on the boiler.
In the circulating water system using carbon steel heat exchanger, the chloride ion content should be controlled; the stainless steel heat exchanger should control the chloride ion. The influence of the chloride ion content on the boiler is firstly reflected in the corrosion of steel pipes, which affects the durability of pipelines. High concentration of chloride ion has a great corrosion phenomenon for the boiler, which will also have a great impact on the safety of the boiler.
According to the no requirement for chlorine in the water quality standard of industrial boilers, the chlorine control of general pot water is less than 400 mg/L, and the feed water is less than 30 mg/L.
If the chloride ion content in pot water is too high, the boiler discharge should be strengthened to eliminate the influence of chloride ion content on the boiler; For sodium ion exchange is used for feed water, attention should be paid to whether the ion exchanger is washed thoroughly after regeneration and whether the brine valve is leaking.
The above is the impact of chloride ion content on the boiler. If you need to know the detailed information of the instrument, you can directly contact the customer service. The customer service team of Erun environmental protection will serve you at any time.
