How to clean the cooling water tower of a walk-in constant temperature and humidity Box (2)

Scheme two: non-stop neutral cleaning

Under the normal operation of the unit, the neutral cleaning agent is added to the cooling water and chilled water system for cyclic cleaning for about 30 days. The cleaning solution is released, and the cleaning process is finished with the maintenance agent. The cleaning time of this scheme is relatively long, but it can be carried out under the normal operation of the unit, and will not affect the normal operation of the unit.

Characteristics of neutral cleaning agent:

1, neutral cleaning no corrosion: the product does not change the PH value of the water after joining the central air conditioning water system, no corrosion damage to metal, completely solve the corrosion hazard of the currently widely used strong acid cleaning agent on metal, to achieve no corrosion cleaning.

2, high cleaning efficiency: it is effective for all types of scale, especially for acid cleaning sulfate and other insoluble scale and algae biological mud can also be completely removed, the descaling rate is more than 95%, so as to restore the original performance of the equipment, keep the equipment clean operation.

3. Simple operation: under the normal boot condition of the test equipment, add the neutral cleaning agent to the water system and run for about 30 days. The cleaning agent can be discharged to completely remove all kinds of scale in the water system.

Neutral cleaning principle:

According to the latest theory of coordination field chemistry, d orbitals of metal ions can be split under the influence of electrostatic field of some ligand compounds to form orbitals with different energies. When the ligand gives lone pair electrons to form O linkages with central metal elements, if there are empty π molecular orbitals or empty p and d molecular orbitals in the ligand molecule, and the symmetry is suitable, The lone pair in the d orbital of the central element can form a feedback π bond with the ligand, thus forming a stable coordination compound.

Based on the above principles, the π accepting ligand was selected as a compound that can split the Ca2+ and Mg2+d orbitals and has π molecular orbitals. When this compound interacts with calcium and magnesium scale, it forms stable coordination compounds with Ca2+ and Mg2+d, thus destroying the molecular structure of calcium and magnesium scale, dissolving them in water and removing them by sewage.

maintenance

After all cleaning, the cooling water, refrigerant water system to take pharmaceutical maintenance. The addition of corrosion and scale inhibitor in 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. Can prevent the formation of scale salt in water. Thus it plays the role of corrosion inhibition and scale inhibition. Adding bactericidal algaecide in cooling water, because the cooling water system is in the open state, there will be fungi and algae in the recycling process, bactericidal algaecide can inhibit the generation and survival of fungi and algae, so as to play a role in regulating water quality.