【Q&A Question 135】2018.05.15
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【Q&A Question 135】May 15, 2018: What chemical agents are required in a hydrofinishing unit and what are their functions? During normal production, a corrosion inhibitor is added to the top of the distillation tower to reduce corrosion; scale and fouling in the equipment are prevented by adding scale inhibitors to the raw materials. Sodium triphosphate is used in steam boilers to prevent scaling, and water is injected before air cooling to avoid salt formation. Antioxidants need to be added to the finished product to improve its stability. During operation, a vulcanizing agent is required to vulcanize the catalyst. During shutdown, a passivator is needed to prevent ferrous sulfide from self-igniting, while chemical cleaning requires cleaning agents and demulsifiers. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below. The APP short-video skills competition has begun! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
During normal production, a corrosion inhibitor is added to the top of the distillation tower to reduce corrosion; scale and fouling in the equipment are prevented by adding scale inhibitors to the raw materials. Sodium triphosphate is used in steam boilers to prevent scaling, and water is injected before air cooling to avoid salt formation. Antioxidants need to be added to the finished product to improve its stability. During operation, a vulcanizing agent is required to vulcanize the catalyst. During shutdown, a passivator is needed to prevent ferrous sulfide from self-igniting, while chemical cleaning requires cleaning agents and demulsifiers.
Function of hydrogenation corrosion inhibitor: Prevent pipeline corrosion and keep iron ions at ≤5； Ethanolamine desulfurization additive: Function – removes hydrogen sulfide from circulating hydrogen, enhancing the desulfurization effect ； Function of defoamer: Used in the extraction unit to prevent foaming of the extractant ； Cetane number improver: Function – to increase the cetane number of diesel. Detergent: Function – to raise the cold filter plugging point of diesel. Diesel anti-wear agent: Function – to enhance the anti-wear properties of diesel
Function of hydrogenation corrosion inhibitor: Prevent pipeline corrosion and keep iron ions at ≤5； Ethanolamine desulfurization additive: Function – removes hydrogen sulfide from circulating hydrogen, enhancing the desulfurization effect ； Function of defoamer: Used in the extraction unit to prevent foaming of the extractant ； Cetane number improver: Function – to increase the cetane number of diesel. Detergent: Function – to raise the cold filter plugging point of diesel. Diesel anti-wear agent: Function – to enhance the anti-wear properties of diesel
During normal production, a corrosion inhibitor is added to the top of the distillation tower to reduce corrosion; scale and fouling in the equipment are prevented by adding scale inhibitors to the raw materials. Sodium triphosphate is used in steam boilers to prevent scaling, and water is injected before air cooling to avoid salt formation. Antioxidants need to be added to the finished product to improve its stability. During operation, a vulcanizing agent is required to vulcanize the catalyst. During shutdown, a passivator is needed to prevent ferrous sulfide from self-igniting, while chemical cleaning requires cleaning agents and demulsifiers.
1. Scale inhibitor added to the raw materials to prevent scaling. 2. Corrosion inhibitor in the stripping tower to reduce corrosion. 3. Trisodium phosphate in boiler water for scale removal. 4. Sulfurizing agent used for catalyst sulfidation during startup phase
During normal production, a corrosion inhibitor is added to the top of the distillation tower to reduce corrosion; scale and fouling in the equipment are prevented by adding scale inhibitors to the raw materials. Sodium triphosphate is used in steam boilers to prevent scaling, and water is injected before air cooling to avoid salt formation. Antioxidants need to be added to the finished product to improve its stability. During operation, a vulcanizing agent is required to vulcanize the catalyst. During shutdown, a passivator is needed to prevent ferrous sulfide from self-igniting, while chemical cleaning requires cleaning agents and demulsifiers.
Function of hydrogenation corrosion inhibitor: Prevent pipeline corrosion and keep iron ions at ≤5； Ethanolamine desulfurization additive: Function – removes hydrogen sulfide from circulating hydrogen, enhancing the desulfurization effect ； Function of defoamer: Used in the extraction unit to prevent foaming of the extractant ； Cetane number improver: Function – to increase the cetane number of diesel. Detergent: Function – to raise the cold filter plugging point of diesel. Diesel anti-wear agent: Function – to enhance the anti-wear properties of diesel
During normal production, a corrosion inhibitor is added to the top of the distillation tower to reduce corrosion; scale and fouling in the equipment are prevented by adding scale inhibitors to the raw materials. Sodium triphosphate is used in steam boilers to prevent scaling, and water is injected before air cooling to avoid salt formation. Antioxidants need to be added to the finished product to improve its stability. During operation, a vulcanizing agent is required to vulcanize the catalyst. During shutdown, a passivator is needed to prevent ferrous sulfide from self-igniting, while chemical cleaning requires cleaning agents and demulsifiers.
During normal production, a corrosion inhibitor is added to the top of the distillation tower to reduce corrosion; scale and fouling in the equipment are prevented by adding scale inhibitors to the raw materials. Sodium triphosphate is used in steam boilers to prevent scaling, and water is injected before air cooling to avoid salt formation. Antioxidants need to be added to the finished product to improve its stability. During operation, a vulcanizing agent is required to vulcanize the catalyst. During shutdown, a passivator is needed to prevent ferrous sulfide from self-igniting, while chemical cleaning requires cleaning agents and demulsifiers.
1. Scale inhibitor added to the raw materials to prevent scaling. 2. Corrosion inhibitor in the stripping tower to reduce corrosion. 3. Trisodium phosphate in boiler water for scale removal. 4. Sulfurizing agent used for catalyst sulfidation during startup phase