Fouling+Controls

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Fouling can be controlled if we have a better knowledge of understanding its mechanism in the first place. We can also alter the process to minimize the fouling deposition, or we can add chemicals to eliminate or reduce the fouling deposition. ======

· Using additives such as aromatic solvents to control asphaltene precipitation (Need high aromaticity to be effective)




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· Doubling the cooling elements (when the first cooling fluid enters the cooling elements, the fouling is first happened in the first cooling element, and the cooling fluids is then directed to the second cooling elements, while the fluid the first cooling elements will be heated to remove the crystallization fouling accumulations) ======

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· Using direct- contact refrigeration technique (the refrigerant is mixing with the crystal suspension where it will absorb heat and vaporize, then condensed and recirculate back to the crystallizer) ======





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Corrosion fouling can be controlled by using antifouling paints by adding various substances into the coating to give the surface antifouling or anticorrosive properties to help prevent the surface from reacting with the surrounding fluids and to protect the surface against the accumulation of corrosion. ======

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· Lead: lead was used as a biocide, a pigment, and a stabilizer in antifouling paints. Both inorganic and organolead compounds were used. The concentration of lead in antifouling paints is between 1% to 5%. ======

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· Organotin: organotin was used in antifouling paints due to its excellent antifouling properties. Both tributyl tin (TBT) and triphenyl tin (TPT) were used. However, tributyl is more commonly used. The concentration of organotin in antifouling paints is between 10% to 15%. ======



This is a very interesting video showing crude heat exchanger cleaning tube tech international
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