Solar water heater inside the scale how to clean it?
In addition, in the course of use, should be added to the tank with water, as far as possible so that the water temperature in the tank drops, it is best not to exceed 75 degrees, so that can reduce the scale of production.The formation of scale is a complex physical and chemical process, which has two aspects: internal and external factors. There is a water calcium and magnesium ions and heavy metal ions, is the root cause of scale formation is also called internal; two is a solid substance from the supersaturated water precipitation and adhere to the metal surfaces, is the external cause of the scale. When the water containing calcium, magnesium and other salts impurities into the heating body, the heat absorbed by the heat transfer to the high temperature, calcium, magnesium salts impurities will produce a chemical reaction, the formation of insoluble substances precipitation. When the concentration reaches a certain concentration, the precipitate will become a solid precipitate, the surface of the heated surface, forming a layer of "film", blocking heat transfer, this layer of "film" is called scale. Scale formation needs to achieve two basic conditions:
1, water temperature for a long time to maintain above 70 degrees;2, the water is relatively static state.The composition or composition of the scale is complex, usually not a single compound, but a chemical composition, and contains other chemical components. According to the chemical composition of the scale, generally can be divided into several kinds of carbonate, silicate sulfate scale scale, scale, scale, scale, mixed oil and iron oxide scale and dirt etc..The scale is a poor thermal conductivity material, will hinder the transfer of heat, the water heater is not uniformly heated, causing local overheating, or partial pressure, eventually damage the water heater, even in danger.
Cleaning method of solar water heater scale, the water out of the tank, the hands hold the vacuum tube rotate back and forth, make its loose, then turn on the water tank to the bottom to push out from the base, and then pulled down, so that you can remove the vacuum tube, the vacuum tube in the water drained, and then use clean water repeatedly rinse clean, which in turn will be vacuum tube after cleaning the tank to add tap water, so that the scale in the water tank outflow, and then one by one the vacuum tube can be installed, the installation should check the sealing ring mounting hole of the water tank is intact, if damaged, should be replaced with a new sealing ring.
