How can scaling occur on the chilled water side?
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Hello, everyone: Recently, I’ve noticed that the heat exchange efficiency of our heat exchanger has suddenly decreased; I’m not sure what the cause is Please advise? Equipment Name, Specifications, Model: Φ inner diameter × L length, Volume in m3, Heat exchange area in m3. Manufacturer, Date of manufacture/commissioning (year). Material, Design/operating conditions, Medium. Shell side, Tube side, Pressure in Mpa, Temperature in °C. Material name, Wall thickness (mm). Shell side P set/P operating, Tube side P set/P operating. Shell side T set/T operating, Tube side T set/T operating. Shell side/tube side: Gas drying cooler, ∮800×10×767, 13.428, 0.7. Sichuan Emei Xingde Machinery Co., Ltd., 2007/2008. 16MnR, 10, 16MnR, 10. 1.0/0.65, 1.8/0.06, 100/30–450, –10/0–3. Chilled water, Acetylene. Recently, when the chilled water pipeline was opened, a black layer was found on it; it seems to be oil sludge. Acetylene flows through the tube side, with a flow rate of 2300 Nm3. The inlet temperature is 30 degrees, while the desired outlet temperature is below 4 degrees. Currently, the temperature is between 8 and 11 degrees. The chilled water inlet temperature is –1 degree, and the return water temperature is only 1 degree. Previously, 30 m3 of chilled water was sufficient, but now 45 m3 is still not enough. Please advise How to deal with it, or how to clean it? What medicine?
Reply to 1# wanghai127127: It is necessary to check the composition of the scale. If it is heavy oil scale, an alkaline cleaning solution along with surfactants can be used; if it is calcium carbonate scale, an acidic cleaning solution together with scale inhibitors should be used. Please add QQ 458017102 to learn together*
I want to tell you that chilled water also needs to be treated in the same way as circulating water, by adding special chemicals; the types of chemicals used vary depending on the water treatment manufacturer. You can consult with a manufacturer specializing in circulating water treatment for more details. We add chemicals to our chilled water to ensure it remains clear and free from any dirt
What chemicals are generally needed to be added to chilled water, and what is it used to prevent?
For things like circulating water samples, it is necessary to control the concentrations of various components, such as chlorides and phosphates
I see. I didn’t know it was a reward based on ratings before; that’s frustrating