Plate heat exchangers should be cleaned regularly; scale problems pose many hazards
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Over time, plate heat exchangers develop scale under prolonged heating and cooling conditions, which leads to blockages in the exchanger and reduces its heat exchange efficiency, preventing it from achieving its original performance levels. It causes various inconveniences for users. Failing to clean the scale buildup in a timely manner can lead to deteriorated heat exchange conditions; the heat transfer surfaces of the heat exchanger may reach temperatures above their rated limits or experience localized overheating, which can cause cracks and pipe failures in the heat exchanger, resulting in accidents. The energy consumption increases, failing to achieve energy-saving effects. The accumulation of dirt threatens the safe operation of heat exchangers and shortens their service life, leading to equipment shutdowns and repairs; in severe cases, the existing heat exchangers must be discarded and replaced with new ones.
During the use of plate heat exchangers. Due to improper operation of the water treatment equipment. When water quality control is not up to standard, substandard softened water is introduced into the heating system; as a result, the calcium, magnesium, and carbonates in the water decompose upon heating into calcium carbonate and magnesium hydroxide precipitates, which adhere to the heating surfaces of the heat exchangers, forming hard scale. Due to the poor thermal conductivity of scale, it leads to a reduction in the heat exchange efficiency of the heat exchanger as well as severe waste of thermal energy. This, in turn, affected the efficiency of heat supply, causing serious negative impacts on the heating providers.
The heat exchanger was not cleaned in a timely manner, and the scale in the water was not fully filtered, resulting in untreated water being discharged from the outlet and supplied directly to the users. Ordinary domestic hot water units are primarily used for bathing; water that has not been fully filtered can have adverse effects on the human body when in contact with the skin for extended periods, affecting health. Measures to prevent scaling in plate heat exchangers include strict control of water quality during operation; it is necessary to conduct thorough water quality tests on both the water in the system and the softened water in the softening tanks, and only after it meets the required standards can it be introduced into the pipeline network. When the new system is put into operation, the heat exchanger should be separated from the heating system; after circulating for a period of time, the heat exchanger can then be integrated into the system, in order to prevent impurities in the piping network from entering the heat exchanger. In heating systems, in addition to periodic cleaning of strainers and filters, it is also necessary to maintain cleanliness within the piping network to prevent blockages in the heat exchangers.
To address the scaling issue in plate heat exchangers, shell and tube heat exchangers can also be considered. This new type of shell-and-tube heat exchanger is equipped with dedicated inlet and outlet ports for cyclic cleaning, facilitating the removal of local scale formation and making it less prone to scaling. In terms of reliability design, 1mm-thick 316L stainless steel heat exchange tubes are also used, with full TIG welding, offering high strength and high pressure resistance.
The quality of the circulating water must be controlled at the source
The material is good, but the last picture seems to be promotional in nature.
Well, it seems quite like advertising; I hope more photos can be shared from a communicative perspective
Hehe, it should focus on the problems in the present tense; starting from the root cause is a good approach – I agree! If we’re talking about the past, installing such a thing didn’t really make much sense. Really, discussing the principle behind this new thing might be a bit interesting. . . .