Chemical flushing of heating systems
Heating systems are designed for heating homes during the cold period of time. There is a relationship between the efficiency of its operation and a variety of indicators: quality of the heat carrier, work of the heat generator, working pressure, timeliness of maintenance. Due to properly conducted flushing of heating systems in private and multi-family houses, it is possible to achieve a significant extension of the service life of pipelines, batteries in combination with other elements of the system, as well as an improvement in its heat transfer.
Why is it important to take care of flushing?
Due to the periodic flushing of heating systems in residential buildings, it is possible to get rid of various layers, scale, oxide films, limescale, etc., accumulated on the internal cavities of pipes and heating units during the operational period, which significantly reduces the diameter of the pipes. Professionals engaged in the maintenance of heating systems, recommend flushing systems after 5 years of operation. According to the results of research, due to each millimeter of deposits, heat transfer decreases from about 10 to 15 percent. In addition, due to the scale that forms on the inner walls of radiators and pipes, there is a problem with uneven heating of radiators, longer heating of the system, and mechanical wear of the metal. There is also an increase in friction between the water and the walls; therefore, the flow rate of water in the system decreases, which contributes to a decrease in the heat carrier temperature. This increases the consumption of fuel required to achieve the required temperature, which leads to higher costs associated with heating, and to a gradual decrease in the quality of the heating system. Therefore, it is necessary to take care of periodic flushing of heating systems.
What are the methods of flushing heating systems?
Before the flushing, a system diagnosis is performed to identify the composition of the scale. In accordance with the results, selection of flushing method and necessary equipment is performed. Upon completion, the walls of the system are treated with an anticorrosive composition, so that no new layers can form. Today, in practice, there are three main flushing methods: chemical; air-pulse; hydrodynamic. Each method has a number of advantages and disadvantages.
It is the most popular and popular method, which allows using chemicals to efficiently and quickly get rid of scale. When dissolving the formed scab, there is no damage to the metal. This is due to the use of reagents that do not contain solvents, alkalis, complexones, solutions containing organic or mineral acids.
The selection of the chemicals and time of exposure is carried out individually, in accordance with the pipeline material, particulate contamination of pipes and radiators.
What are the advantages of chemical flushing?
Chemical treatment has obvious advantages: simplicity of the work, ability to perform such procedures during the heating season with heating turned on, single cycle to get a quality result. Thanks to chemical cleaning, it is achieved an extension of the service life of heating systems to ten and over years and a significant increase in the efficiency of radiators.
The high toxicity of the chemicals used should be mentioned among the disadvantages of this method. Such flushing cannot be used in systems that have impaired tightness, as well as in thinned pipes, the walls of which cannot cope with concentrated reagents. It is forbidden to use this aggressive method in aluminum batteries.
What equipment is used for chemical flushing?
In order to carry out chemical flushing of heating systems in residential buildings, special equipment is used with the following main components: a pump, a solution reservoir, a hose for drainage and liquid supply.