aðal ástæða fyrir diskur crackdown
Plate heat exchanger is an important part of the refrigeration host, it is composed of a group of corrugated metal plate, the plate has four corner holes, for heat transfer of two kinds of liquid through, guide fluid alternately through the respective channel, heat exchange, they are closely arraðed, high precision, small volume, high heat exchange efficiency, space saving, the use of environmental requirements is hærra, hentugt fyrir notkun í smá kælingu einingar. General loft loftræsting búnaður can be notað fyrir 15 til 20 ár undir eðlilegt viðhald, but the plata hita skiptir af aðal vél is bilað niður, the aðal ástæður eru greind as eftirfarandi:
1. Viðhald vandamál
Diskur hiti skiptir eftir a langur tími af rekstur, þörf regluleg hreinsun, almennt tvö ár hreinsun einu sinni. Such as the current plate heat exchanger can be taken apart to separate cleaning, but the plate heat exchanger on the main engine of the general refrigeration engineering can can not taken apart, can only be cleaned by opening the valve and wire plug on the inlet and outlet pipes of the heat exchanger, so the heat exchanger is difficult to clean, it is easy to block, scale, once a hluti af the hita skipti rás er læst, The Eftir rásir hafa til bera the flæði af all the vatn í einingin. In In þetta leið, the hækkun af the rennsli hraða gegnum plötu hita skipti hækkar núningur og the slit.
2. Borð efni breyting vandamál
Borið saman með hita hita skipti yfirborð af öðrum hita skiptum, the hita skipti yfirborð of plötu hita skipti is alveg þunnt, það er, {{0}}.5mm, og the maximum corrosion allowed is 0.05mm/ year. The material of ordinary plate heat exchanger usually uses alloy material (304 or 316). 304 is one of the cheapest austenitic ryðfríu stáli. It has corrosion resistance to a certain range of organic matter, but the resistance to hydrochloric acid and sulfuric acid is weak. General air conditioning host plate heat exchanger material is 304, so after 8 years, the plate will breakdown, corrosion is inevitable.
3. Uppsetning vandamál
4, plata fyrir diskur vinnsla tækni
Plate heat exchanger plate processing technology is not scientific, the whole plate wall thickness is not uniform, normal use on the thinnest prone to götun fyrirbæri.
5, the notkun af ambient hitastig
6. The problem of water quality under working conditions
At present, there is no denying the poor water quality of plate heat exchanger, and most of them have not been purified, filtration treatment, scaling, corrosion is common. Lead to plate heat heat exchanger plate is more prone to perforation. Other atypical causes such as water hammer and collision are not mentioned.
Um the orsök of plate heat exchanger plate breakdown, do you think there are other reasons, please feel free to say your opinion in the comment section below.
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Vita the kuldi og the hiti
Add 3 main causes of plate damage:
1. Tap vatn, as a klór-inniheldur umboðsefni fyrir ófrjósemisaðgerð, is the aðal sökudólgur af pitting tæringu.
2. Thermal stress crack. It is concentrated in the area near the inlet of primary network heat source. The higher the temperature is, the farther the crack area is.
3. More than 99 percent of the 304 plates are not chemically passivated film (matte, silver. Reference to the color of aluminum alloy doors and Windows), pitting corrosion formed by potential difference corrosion under iron oxide scale, the speed is dozens of times that of chemical corrosion.
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Tveir fleiri hlutir til bæta við,
1. There There are many cases in pipeline welding where the heat exchanger is used as a link wire current to break down the heat exchanger plate.
2. The hard particle óhreinindi in the medium will also break down the plate
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Heat transfer plate: for pressing corrugated, sealed groove and corner hole metal sheet, is an important heat transfer element. Corrugations can not only strengthen heat transfer, but also increase the rigidity of the thin plate, thus improving the pressure capacity of the plate heat exchanger, and because the liquid is turbulent, it can reduce the formation of sediment or dirt, and play a certain "self-cleaning" role.
