The tubes of the true flash condenser of the black water system often leak. What is the reason and how to deal with it?
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The tubes of the true flash condenser of our plant's black water system leaked twice, and circulating water leaked in, causing a waste of deep well water. In order to maintain the system water balance, the drainage volume outside the system increased. The specific reason is not clear. One theory is that the condensed liquid phase is acidic and has a low pH value, causing corrosion. Another theory is that the gray water is dirty and erosion is caused by erosion. Please give your opinions.
The main cause of corrosion is that black water contains HCl and HCN, which enter the condensed gas after flash evaporation and are both highly corrosive media. It is recommended to replace the tube material.
Reply 1# lhsxd I think that in addition to erosion and corrosion, it is also related to the design, the thermal stress resistance of the pipe and its material. The treatment method can be based on operational processes, such as reducing the true flash vacuum degree, reducing scour, adjusting the system water quality to control the PH value, reducing corrosion, and considering reducing thermal stress in the design. This should eradicate it.
Circulating water scales on the pipe wall, causing corrosion under the scale
Focus on checking the chloride ion content in circulating water
Caused by corrosion, flash gas condenses into acidic