The
Cooling Tower has been exposed to the outside for many years, and the adsorption force of the fan is very strong, causing a large amount of sediment and dirt to enter the tower. Long-term operation will gradually reduce the heat dissipation capacity of the cooling tower, and the outlet hole of the water distributor is easily blocked. Sand and dirt can easily enter the cooling water system, which will directly affect the normal cooling of the cooling water system. In order to prevent the above situation from happening, the cooling tower must be cleaned regularly. , There are two common cleaning methods.
Method Ⅱ
Non-stop neutral cleaning. When the unit is in normal operation, add neutral cleaning agent to the cooling water and chilled water system for cycle cleaning for about 30 days, release the cleaning liquid, and add the maintenance agent to complete the cleaning process. The cleaning time of this solution is relatively long, but it can be carried out under the normal operation state of the unit, and it will not affect the normal operation of the unit.
Neutral cleaning is non-corrosive, and the product does not change the pH value of the water after being added to the central air-conditioning water system, and has no corrosion damage to metals. It solves the hidden danger of metal corrosion caused by strong acid cleaning agents commonly used at present, and realizes non-corrosive cleaning. It is effective for various types of scale, especially for refractory scale such as sulfate and algae biological slime that cannot be cleaned by pickling, so as to restore the original performance of the equipment and keep the equipment running cleanly.
In addition, the operation is simple. Under the normal start-up condition of the central air conditioner, add a neutral cleaning agent to the water system and run it for about 30 days, and then discharge the cleaning agent to completely remove all kinds of scale in the water system.
Neutral cleaning principle: According to the latest theory of ligand field chemistry, under the influence of the electrostatic field of some ligand compounds, the d orbital of metal ions can be split to form orbitals with different energies. When the ligand gives a lone pair of electrons and When the central metal element forms an O bond, if there are empty π molecular orbitals or empty p, d molecular orbitals in the ligand molecule, and the symmetry is appropriate, the lone pair on the d orbital of the central element can interact with the ligand A feedback π bond is formed to form a stable coordination compound.
Based on the above principles, the compounds that can split the energy levels of Ca2+ and Mg2+d orbitals and have π molecular orbitals are selected as π-accepting ligands. When this compound interacts with calcium and magnesium scale, it forms a stable coordination compound with Ca2+ and Mg2+d, thereby destroying the molecular structure of calcium and magnesium scale, dissolving it in water and removing it through sewage.
After all the cleaning is completed, chemical maintenance is carried out on the cooling water and refrigerant water systems. Adding corrosion and scale inhibitors to the refrigerant water system can form stable complexes with iron, copper, zinc and other metal ions to prevent the corrosion of oxygen and metal ions in water. Through chelation, inhibition and lattice distortion. Prevents scaling salts from forming scale in water. So as to play the role of corrosion and scale inhibition. Bactericide and algaecide are added to the cooling water. Since the cooling water system is in an open state, fungi and algae will be produced during recycling. The bactericide and algae killer can inhibit the production and survival of fungi and algae, thereby regulating water quality.
May 19, 2023
