【Daily Question】Chemical Engineering Principles 299: Chemical Cleaning (January 19)
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This post was last edited by “Back to Cambridge” on January 27, 2016, at 15:03. Starting today, the Chemical Engineering Theory section is launching the “Question of the Day” activity, aimed at helping everyone reinforce their fundamental knowledge in chemical engineering. Subsequently, series such as “Principles of Chemical Engineering”, “Mass Transfer and Separation”, “Chemical Thermodynamics”, and “Chemical Process Technology” will also be introduced. We hope for your active participation! Wishing you all a Merry Christmas~~ For replies to the “Question of the Day” activity, answers can be viewed directly; however, the thread will be closed after one day! ! To encourage everyone’s continued participation this year! Participation earns 3 wealth points, with an additional 4 wealth points for correct answers~~~ Short answer question: Briefly describe the general steps and purposes of chemical cleaning. Answer: 1) Rinse with water. Removes impurities from the furnace, such as dust, slag, and deposits. 2) Alkaline washing or alkaline boiling. Removes fats and some silicic acid compounds. 3) Pickling. Thoroughly remove scale and deposits from the boiler. 4) Rinsing. Removes rust and residual iron ions from the pickling process. 5) Passivation. The acid-treated and activated metal surface is treated with chemical agents to form a protective film, preventing re-corrosion in the boiler.
1) Water flushing. Rinse away impurities such as dust, slag, and deposits. 2) Alkaline washing or alkaline boiling. Removes fats and some silicic acid compounds. 3) Pickling. Thoroughly remove scale and deposits from the boiler. 4) Rinsing. Removes rust and residual iron ions from the pickling process. 5) Passivation. The acid-treated and activated metal surface is treated with chemical agents to form a protective film, preventing re-corrosion in the boiler.
Answer: 1) Rinse with water. Removes impurities from the furnace, such as dust, slag, and deposits. 2) Alkaline washing or alkaline boiling. Removes fats and some silicic acid compounds. 3) Pickling. Thoroughly remove scale and deposits from the boiler 4) Rinsing. Removes rust and residual iron ions from the pickling process. 5) Passivation. The acid-treated and activated metal surface is treated with chemical agents to form a protective film, preventing re-corrosion in the boiler
Water washing, alkali washing, acid washing, rinsing, passivation
I’m here to boost my score. . . Answer: 1) Rinse with water. Removes impurities from the furnace, such as dust, slag, and deposits. 2) Alkaline washing or alkaline boiling. Removes fats and some silicic acid compounds. 3) Pickling. Thoroughly remove scale and deposits from the boiler. 4) Rinsing. Removes rust and residual iron ions from the pickling process. 5) Passivation. The acid-treated and activated metal surface is treated with chemical agents to form a protective film, preventing re-corrosion in the boiler.
Answer: 1) Rinse with water. Removes impurities from the furnace, such as dust, slag, and deposits. 2) Alkaline washing or alkaline boiling. Removes fats and some silicic acid compounds. 3) Pickling. Thoroughly remove scale and deposits from the boiler. 4) Rinsing. Removes rust and residual iron ions from the pickling process. 5) Passivation. The acid-treated and activated metal surface is treated with chemical agents to form a protective film, preventing re-corrosion in the boiler.
For medium-temperature cleaning: cleaning with acid + corrosion inhibitor → rinsing → neutralization → rinsing → rust prevention → drying → packaging. For solvent-based cleaners, it’s simpler: just clean twice and let it dry naturally.
Briefly describe the general steps and functions of chemical cleaning. Answer 1) Water flushing----to wash away impurities in the furnace. 2) Alkaline washing or boiling—to remove oils and some silicate compounds. 3) Acid cleaning—removing scale and deposits inside the boiler. 4) Rinsing---to remove rust and residual iron ions from the pickling process. 5) Passivation – to form a protective film that prevents re-corrosion of the boiler.
The general steps for chemical cleaning are: 1) Water rinsing. Removes impurities from the furnace, such as dust, slag, and deposits ； 2) Alkaline washing or alkaline boiling. Remove fats and some silicic acid compounds ； 3) Pickling. Thoroughly remove scale and deposits from the boiler ； 4) Rinsing. Remove rust and residual iron ions from the pickling process ； 5) Passivation. The acid-treated and activated metal surface is treated with chemical agents to form a protective film, preventing re-corrosion in the boiler ；
1) Water flushing. Removes impurities from the furnace, such as dust, slag, and deposits. 2) Alkaline washing or alkaline boiling. Removes fats and some silicic acid compounds. 3) Pickling. Thoroughly remove scale and deposits from the boiler. 4) Rinsing. Removes rust and residual iron ions from the pickling process. 5) Passivation. The acid-treated and activated metal surface is treated with chemical agents to form a protective film, preventing re-corrosion of the boiler.