PREPARTION OF SUPPLYING WATER
Losses due to breaks or leaks or repair intervention must be compensated by supplying water. This must be prepared in a way it does not cause formation of deposits, sediments or corrosion.
To prevent formation of sediments and deposits we must remove substances from supplying water, which could form sediments. This can be achieved through ion exchange (softening) or in soluble form by chemical treatment.
Water softening is one of the most frequent methods for preparation of supplying water in medium size and large heating systems.
To protect system material against corrosion and deposits, we need to add into the supplying water corrosion inhibitors, hardness stabilizers and dispersants or the so called multifunctional chemicals which contain all required components. Only the right concentration of these substances in the system water enables efficient system protection. In the system with stable water quality, upon the supposition that the quality of supplying water is stable as well, it is possible to add chemicals proportional to the supplying water flow. In other cases we need to check regularly the level of inhibitors and add them if needed.
The corrosion dynamics can be ascertained and estimated with weight loss measurements on corrosion coupons. These must be installed in the circulation in compliance with the proper standards.
SYSTEM WATER TREATMENT
The first and the biggest problem in the system is corrosion. To avoid it we need to add chemical oxygen binders. Dosing of such chemicals into the system is normally performed if needed or based on the analysis of heating water.
The second and not less important problem are particles which appear in heating water along with corrosion. Such impurities can be removed through partial or circular filtration.
The ratio between the filtered water flow and the basic flow depends on the quantity of impurities and special technological requirements. Through circulation filtration heating water can never be absolutely clean, however the quality is stable.
Filtration is performed on bag filters or on self-rinsing filters with cartridges.
