【Daily Question】Chemical Engineering Principles 270: Boiler Blowdown (December 21)
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This post was last edited by “Back to Cambridge” on December 26, 2015, at 13:23. 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 support! For the “Question of the Day” activity, answers can be viewed directly in the replies; however, the thread will be closed after one day! ! To encourage continued participation from everyone this year! Participation earns 3 wealth points, with an additional 4 wealth points for correct answers~~~ Short answer question: Under what circumstances should the boiler’s blowdown be increased? Answer: 1) The boiler has just been started and is not yet in normal operation. 2) The boiler water is turbid or its quality exceeds the standards. 3) The quality of the steam deteriorates. 4) The quality of the feedwater exceeds the standards
When it first starts up or when the water quality in the furnace is poor
The boiler water is eroded or its quality exceeds the standards. The steam quality has deteriorated. The quality of the feed water exceeds the standards. Before the boiler steel is started and put into normal operation.
1) The boiler has just been started and is not yet in normal operation. 2) The boiler water is turbid or its quality exceeds the specified standards. 3) The quality of the steam deteriorates. 4) The quality of the feedwater exceeds the specified standards
Under what circumstances should the boiler’s blowdown be increased? 1. Just after the boiler is started, before it begins to operate normally ； 2. The boiler water is turbid or its quality exceeds the specified standards ； 3. Deterioration of steam quality ； 4. The quality of the feedwater exceeds the standards ；
Answer: It is necessary to pay more attention to enhancing slag discharge when the following situations occur in the boiler: 1. When the boiler has just been started and has not yet entered normal operation; 2. When the boiler water is turbid or its quality exceeds the specified standards; 3. When the quality of the steam deteriorates; 4. When the quality of the feedwater exceeds the specified standards
(1) When the boiler has just been started and is not yet in normal operation. (2) The boiler water is turbid or its quality exceeds the standards. (3) Deterioration of steam quality. (4) The quality of the feedwater exceeds the standards.
1. The boiler has just been started and is not yet in normal operation; 2. The boiler water is turbid or its quality exceeds the specified standards; 3) The quality of the steam deteriorates; 4) The quality of the feedwater exceeds the specified standards
1) When the boiler has just been started and before it is put into normal operation. 2) The boiler water is turbid or its quality does not meet the standards, especially when parameters such as pH value and phosphate levels are out of range. 3) Deterioration of steam quality. 4) The quality of the water supplied exceeds the standards. When the quality of the boiler water deteriorates, the first step taken is to increase the amount of water drained, with the aim of accelerating the water replacement in the boiler and ensuring that all relevant control parameters for the boiler water remain within acceptable limits. But this is also carried out under the principle of “three-stage treatment”. Primary treatment – There is a risk of corrosion, scaling, and salt deposition due to impurities; it should be brought back to the corresponding standard values within 72 hours. Secondary treatment – There is a definite possibility of corrosion, scaling, and salt deposition due to impurities; it should be brought back to the corresponding standard values within 24 hours. Stage 3 treatment – Rapid corrosion, scaling, and salt deposition are occurring; if the water quality does not improve within 4 hours, the boiler should be shut down.
Under what circumstances should the boiler’s blowdown be increased? (1) When the boiler has just been started and has not yet entered normal operation. (2) The boiler water is turbid or its quality exceeds the standards. (3) Deterioration of steam quality. (4) The quality of the feedwater exceeds the standards.
(1) When the boiler has just been started and has not yet entered normal operation. (2) The boiler water is turbid or its quality exceeds the standards. (3) Deterioration of steam quality. (4) Water supply quality exceeds standards