The circulating water pipe is blocked, what should I do?
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The circulation water pipes are made of carbon steel with a diameter of 40; the temperature of the circulation water is 40°C, and it rises to around 75°C after passing through a tower. Currently, the pipes behind the tower are severely scaled up. . Newbie seeking solutions; those with experience in this area, please share your thoughts.
May I ask if the temperature and flow rate of the circulating water at the LZ tower outlet match the design values? If only the circulating water pipes behind the tower are severely scaled, check for any leaks in the medium inside the tower ； If the pipes throughout the entire circulating water system are severely scaled, check whether there are any issues with the dosage or type of chemicals being used.
The flow doesn’t get blocked; generally, flowing water doesn’t cause blockages. Have you left the vehicle parked for a long time without draining the water from the pipes?
The tower is operating well; scaling only occurs after that, so it’s necessary to check whether the dosage or the mixing ratio is appropriate
The temperature of the circulating water rises from 40 degrees to around 75 degrees; your circulating water temperature isn’t low at all. Given that the temperature rise in the circulating water is so high, the material in heat exchange with it must be above 100 degrees, making scaling inevitable. Remedial action: Acid wash the heat exchange section when parking ； Pickling is not possible; backwashing is the only option. In cases of severe scaling, the tube must be replaced.
It might be necessary to replace the pipe; the 40-sized pipe has gotten clogged down to a 20-sized one. . If pickling is to be done, what acid should be used and what is the concentration?
It was shut down for maintenance for 1 month in between; it’s likely due to too high temperatures and low water pressure
Scale will definitely form when the circulating water reaches 75 degrees; this should have been taken into account during the initial design. At this temperature, it is rare to see the use of circulating water; it is recommended to use steam condensate or deionized water instead.
The main cause of scaling in pipes is water quality issues, with an excessively high degree of water concentration. The reasons may be an inappropriate dosage formula or whether the medication is still within its expiration date. The temperature after the tower is 75; which one is more prone to scaling? The pipes are clogged; acid backwashing can remove the scale, but it damages the pipes. To meet process requirements, it is recommended to address the issue by improving the water quality instead. If what I said is inappropriate, please give me some guidance
You’re very professional in your approach; if acid cleaning is to be used, what kind of acid should be employed and what should be the concentration?