Solutions for preventing scale formation in heat exchangers and for their cleaning and maintenance; who is the best at preventing scale in heat exchangers
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Principle of scale formation in heat exchangers: Traditional shell-and-tube heat exchangers have a horizontal, single-structure design, with baffle plates arranged in a staggered pattern across the width; the cold and hot fluids exchange heat in opposite directions within the shell and tube passages.
Inside the heat exchanger, there are manufacturing gaps between the baffle plates and the tube shells, as well as between the baffle plates and the heat transfer tubes; furthermore, dead zones exist at the ends of the baffle plates that are perpendicular to the tube walls. At this point, the cold water that enters the heat exchanger, after undergoing heat exchange with the medium, rises to a certain temperature and scale is formed. This scale gradually accumulates on the walls of the tubes, eventually causing the heat exchange tubes to become blocked.
2 Principles of scale cleaning and maintenance: Dissolution: Acidic solutions react with calcium, magnesium, and carbonate scales to form soluble compounds, thereby dissolving the scales. Peeling: An acid solution dissolves the oxides on the metal surface, breaking the bonds with the scale, thereby allowing the scale on the metal surface to peel off and fall away. Gas lifting: The acidic solution reacts with calcium, magnesium, and carbonate scale, producing carbon dioxide gas that escapes; this creates a force sufficient to dislodge layers of scale that are difficult to dissolve or dissolve slowly. Loosening: In the case of scale composed of a mixture of silicates and sulfates, as calcium, magnesium, carbonates, and iron oxides dissolve in acidic solutions, the remaining scale becomes loose and can be easily washed away by the acidic solution.
2. Heat exchanger design to prevent scale formation: The concept behind HYNOV’s heat exchange equipment design for preventing scale formation originates from the kettles used in daily life; once the water boils, scale gradually settles at the bottom of the kettle. Design objectives of HYNOV heat exchange equipment: 1. Prevent scale from forming and accumulating on the surface of the heat transfer tubes, thereby reducing the likelihood of scale formation ； 2. Pure counter-current structure design for maximum recovery efficiency ； 3. Long service life, easy scale removal ；
Design features of the HYNOV heat exchange core: 1. Vertical (upright) installation, ensuring uniform flow of fluids, which facilitates the settlement of scale and reduces the likelihood of scaling； 2. Pure counter-current tube-in-tube structure, offering higher heat exchange efficiency ； 3. Air flows through the interlayer; its volume is small, which avoids the requirements associated with pressure vessel manufacturing, resulting in low pressure loss ； 4. The bottom plate of the scale sedimentation chamber is detachable, and it features a quick-connect outlet for easy online maintenance and cleaning ； 5. It features a direct-heating design, with small water supply main pipes and low power consumption for the water pumps; it is simple to control and has a low failure rate.
It’s an ad, but I learned something; thank you
Why not convert the heating water into softened water?
;P is similar to: Which excavator brand is the best? Look for Lanxiang in Shandong, China
Although it’s an advertisement, it’s still quite well thought out