The heat exchanger and scale processing summary:
Heat exchanger would run time later, inside and outside wall in heat exchanger adhesion a layer of white scale. Scale formation is the main reason of the water solubility of smaller because containing calcium, magnesium salts, this
Kind of salt have common characteristics, and its solubility with water temperature rise, and become difficult to let the salt, the salt of existence, on the heat exchanger can produce the following results:
1, scale heat conduction performance is poor, it than steel heat conduction ability 30 to 50 times more small, have scale will exist in heating heat transfer go bad, so ` make heat transfer surface cannot be to achieve the desired temperature drop
. According to relevant information, after the experiment, produce 1 mm thick scale, heat exchanger will fell about 10% efficiency.
2, scale attached to the heat transfer surface, difficult to remove, increase the maintenance cost, not only the human cost, material, and will make the damage of heating, reduce the heat exchanger life.
3, scale generated after, can reduce the heat transfer surface section of the internal and external circulation, increase the heat transfer surface inside and outside of the circulating water flow resistance, serious when circulation section is small, even completely be blocked, it
Can make heat exchanger can't normal operation.
To prevent the occurrence of above consequences, the design unit or operation unit often use dosing softening, magnetized and ion great anti-scaling treatment, sodium ion exchange processing method. For he
In all of these softening further understand the method, the following to the processing method, the principle of the formula and operation method are introduced.
A. Dosing softening
Dosing softening, has the method is simple, high efficiency, economical and don't need special water making equipment, etc, it is a practical strong inhibition water treatment method. According to
Dosing method is different, the branch is agent processing and inhibition processing two kinds.
2.. magnetized and scale processing
Magnetized anti-scaling treatment principle is to use with the polarity of the water molecules, namely the water molecule is covalent combined. The water by the single molecule polarity and hydrogen bonding effect, polymerization into double molecules associating fit (H2O) two or more molecules associating fit (H2O) n. . As the water through the high intensity magnetic field the water molecules associating contract and the magnetic field of the ion function, the original list of composed of loose ions association for a single tear fit or short key association fit, they with a certain speed vertical cutting the field lines and outside magnetic field induced current. Therefore, every ion to press with outside magnetic field but set up new magnetic field, and the adjacent take the polarity of molecular ions, order to each other and to attract compression, leading to the crystallization of the changed conditions, the JieJingWu formation is very lax, compressive, tensile ability is poor, and brittle, its rapping and adhesion is weak, they are less attached to the heating surfaces formed on the scale.
3. Ion stick and scale water treatment
Ion stick and scale water treatment is a kind of new, advanced water treatment equipment. It is 1987 years the United States patent product, changsha Yorkshire water processing company introduced the product. In the hot water
Circulation system, the central air conditioning system, cooling water circulation system application, all obtain satisfactory and scale effect, is promising new type of water treatment equipment, especially in the heat exchanger
Application, the effect will be more significant.
Four. Sodium ion exchange softening.
