Descaling of facilities devices

  1. Home
  2. »
  3. Descaling of facilities

First of all, we need to have a definition of descaling. Descaling is a set of mechanical and chemical processes to dissolve and separate sediments from the surface of a piece. If we want to give a practical and simple explanation about the sedimentation mechanism and know why sediment is formed at all, we must state that various compounds soluble in drinking water, including calcium and magnesium carbonates, gradually become insoluble under the operating conditions of utility devices. and sit on adjacent surfaces. The sediments created on the surfaces have a low thermal transfer coefficient, and in other words, they can act as a thermal insulator. Therefore, the created sediments have two immediate effects. First, they disrupt the heat transfer in the system. Second, by reducing the cross-section of water, they cause pressure drop. Apart from the mentioned immediate effects, sedimentation will have long-term effects such as sub-sediment corrosion. This type of corrosion is very dangerous, because it leads to perforation of metal surfaces without any symptoms. Therefore, systems that deal with water in some way generally require descaling at various intervals. Devices that are new usually have polished metal surfaces. This causes the speed of sedimentation on the surfaces to decrease and sometimes it even takes up to three years for the device to need the first descaling operation. The sub-sediment corrosion process that starts after the formation of sediment on the surface, removes the polished metal surfaces and causes the surface roughness. This factor makes, after the first descaling, more sediment settles on the surface in less time, and therefore devices such as chillers and boilers may need to be descaled at least twice a year.

Acidic substances are usually used to remove and clean deposits from surfaces. Unfortunately, these acidic substances that are used to clean the sediments cause corrosion of the metal surface, and repeated use of them eventually leads to the destruction of the device. Since after the first descaling, the time intervals between descalings are reduced, the damage caused by these low-quality acid substances on the devices increases due to their frequent use. But the question that arises here is what should we do in the face of the sediment problem! If we do not descale the device and leave it alone, after a while the device will practically stop working. If we descale with acidic materials available in the market, we have caused damage to different parts of the device! A device that even minor repairs have staggering costs. So what is the solution?

Sensitivity in choosing the descaling material is the solution, to be careful what material we use to descale our expensive device. Have we considered the lowest possible budget for the preparation of anti-scaling material? Is the price the only criterion for choosing the anti-fouling material and we have no sensitivity to its technical points? If the answer to these questions is positive, we should definitely expect heavy consequences. Considering the exorbitant costs of repairing utility devices, we must be very careful in choosing the anti-scaling material. The criterion for choosing a descaling agent should be its safety in the first place. Of course, there is no doubt that in addition to safety, we expect the anti-scaling agent to work with power. In simpler terms, we are looking for a descaling agent that, while powerful in removing deposits, does not cause any damage to the various parts of our device, especially the metal parts. Of course, we may spend a little more for such descaling material, but in return, we have avoided huge expenses hundreds of times. Installation devices are considered valuable assets of any collection. Let’s make sure that we use the utmost attention and tact to preserve these funds. Care and consideration, if not, will leave hundreds of millions of Tomans in damages for us!