How to use the washing machine
Physical law
①Mechanical cleaning method: cleaner and scraper cleaning method, drill pipe cleaning method, shot blasting cleaning method.
②Hydraulic cleaning method: low-pressure hydraulic cleaning (the pressure of low-pressure cleaning is 196-686 kPa, about 2-7 kgf/cm2, equal to 0.2-0.7Mpa).
③Cleaning of high-pressure water jet equipment: The pressure of high-pressure cleaning is 4900 kPa, about 50 kgf/cm2, which is equal to 5Mpa. This method is also called high-pressure water jet method and high-pressure cleaner.
Electronic law
The principle is: use high-frequency electric field to change the molecular structure of water to prevent scale and descaling. When water passes through a high-frequency electric field, its molecular physical structure changes. The original associated chain-like Oita wyt_dsry particles break into single water molecules, and the positive and negative ions of the salts in the water are surrounded by single water molecules, and the movement speed is reduced, resulting in effective collisions. The number of times is reduced, the electrostatic attraction is reduced, and the structure on the heated wall tube surface is not possible, so as to achieve the purpose of anti-fouling. At the same time, due to the increase of the dipole moment of water molecules, it increases the absorption capacity of the positive and negative ions (scale molecules) of the salt, which makes the scale on the heating surface or tube wall become soft and easy to fall off, resulting in a descaling effect.
Electrostatic method
Static anti-scaling and descaling are the same as electronic descaling. They also achieve the purpose of anti-scaling and descaling by changing the state of water molecules. It's just that the latter uses the effect of the electrostatic field, not the effect of electrons. The mechanism is that water molecules have polarity (also called dipoles). When the water dipoles pass through the electrostatic field, each water dipole will be arranged in a positive and negative order. If the water contains dissolved salts, the positive and negative ions will be surrounded by water dipoles, and they will also be arranged in the water dipole group in positive and negative order. They cannot move by themselves, and therefore cannot approach the wall of the tube (apparatus). Then it deposits on the wall of the pipe (device) to form scale. At the same time, the oxygen released in the water can produce a very thin oxide layer on the tube wall, which can prevent the tube (vessel) wall from being corroded.
Chemical method
Chemical agents are used to make the surface pollution or the covering layer chemically react with it to be removed, such as pickling and alkaline washing of the scale layer. In order to prevent the substrate from being corroded during chemical cleaning or to control the corrosion rate within the allowable range, an appropriate amount of corrosion inhibitor and additives for activation, penetration and wetting are usually added to the chemical cleaning solution. Methods: soaking method, circulation method, cleaning method in operation is also called non-stop chemical cleaning method.
