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How does fouling form in graphite heat exchangers?
Release time:
2022-02-09
For ordinary graphite heat exchangers, they are generally classified into the following categories according to their scaling mechanism.
For ordinary graphite heat exchanger, according to its scaling mechanism, generally divided into the following categories.
(1) crystalline scaling: refers to the graphite heat exchanger surface formation of scale, is dissolved in the supersaturated flowing liquid inorganic salt crystallization formation of scale, that is, crystalline scaling, scale is a common scale in industrial equipment. In the water-cooled system, due to the supersaturation of calcium in the water and temperature changes, magnesium salts in the graphite condenser is crystal deposited on the surface of the graphite heat exchanger, that is, the formation of scale.
(2)Particle dust:Solid particles suspended in the fluid system, such as sand, dust, carbon black and dirt accumulated on the surface of the heat exchanger.
(3)Chemical reaction scaling:The formation of self-oxidizing polymerization between the heated surface and the fluid, i.e., deposits produced by chemical reaction.
(4)Corrosive fouling:As the fluid is corrosive or contains corrosive impurities, corrosion products are deposited on the heat exchange surface, forming fouling.
(5) biofouling: refers to microorganisms and their excreta, chemical pollutants, sediments and other components attached to the heat exchanger tubes and pipes on the wall of the formation of viscous deposits, known as biofouling.
(6) Adhesive:In the supercooled heat exchange surface, clean liquids or multi-component solutions of highly soluble components of the condensation of the formation of fouling.
Scaling is usually the result of a variety of processes interacting with each other and interacting with each other, in the actual fouling of the heat exchanger surface, there are often a variety of fouling mixed.
The above is about graphite heat exchanger fouling formation reasons explained, I hope that you can help, if there is a need you can contact us, we can provide you with professional services!
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