【Daily Question】Principles of Chemical Engineering 279: Steam (December 30)
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This post was last edited by Zaihui Kangqiao on 2016-1-13 at 16:41. The Chemical Engineering Theory section is now launching a \"One Question per Day\" campaign to help everyone reinforce their basic knowledge in chemical engineering. Subsequent campaigns will include those on \"Principles of Chemical Engineering\", \"Mass Transfer and Separation\", \"Thermodynamics in Chemical Engineering\", and \"Chemical Process Engineering\" – we hope you will give it your active support! Wishing everyone a happy Christmas! Answers to the questions in the \"One Question per Day\" campaign can be viewed directly; the thread will be closed after 1 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: What are the reasons for unsatisfactory silicon and salt content in steam? Answer: 1) Unqualified quality of boiler water and feedwater. 2) Sudden changes in boiler load, steam pressure, and water level. 3) Deterioration in the quality of the desuperheating water. 4) Improper control of chemicals added to the boiler. 5) Defects in various components of the steam and water separators
1) The quality of boiler water and feedwater is substandard； 2) Sudden changes in boiler load, steam pressure, and water level ； 3) Deterioration of quality of cooling water ； 4) Unreasonable control of chemical dosing in the boiler ； 5) Defects in various components of the steam and water separator ；
What are the reasons for the unsatisfactory silicon and salt content in steam? Answer: 1) The quality of the feed water is substandard. 2) Sudden changes in boiler load, steam pressure, and water level. 3) Deterioration in the quality of the desuperheating water. The larger the boiler capacity and the higher the steam pressure, the stricter the requirements regarding the quality of the boiler water. To ensure that the quality of the boiler water meets the required standards, it is necessary to remove impurities from it. There are two types of waste water discharge: periodic discharge and continuous discharge. The optimal interval for periodic discharge is determined based on the requirements regarding boiler water quality in terms of equipment safety and economic efficiency. Under normal operation, as long as the scheduled intervals are strictly followed and there are no abnormalities in the equipment, the quality of the boiler water can be maintained throughout that period. At this time, the testing of the boiler water is also carried out regularly as recommended by the equipment manufacturer; therefore, during normal operation, regular drainage and testing can be carried out according to their respective scheduled intervals, with no need to consider one before the other. Under special circumstances, when the unit is started, it is usually the shift supervisor or the chief operator of the main engine who checks the quality of the water in the chemical testing furnace; if the quality is not satisfactory, the boiler is required to increase the frequency of regular drainage or to carry out more frequent drainage. Moreover, if the quality of the water in the testing furnace remains unsatisfactory during normal operation, the boiler is again required to increase the frequency of regular drainage. Under the above circumstances, the quality of the boiler water gradually returns to normal. If there is no improvement or if the quality of the boiler water worsens, a comprehensive inspection of the relevant equipment in the unit is carried out; any issues found are addressed through maintenance efforts, and if these cannot be resolved, the operation of the unit is halted. When the water quality is substandard or deteriorates, the shift supervisor will arrange the specific timing and frequency for water quality testing.
1) The quality of the boiler feed water is unsatisfactory. 2) Sudden changes in boiler load, steam pressure, and water level. 3) Reducing water quality deterioration. 4) The chemical dosing control for the boiler is unreasonable. 5) Defects in various separation components of the gas and water separators
The feed water to the furnace is of poor quality. The steam-water separation device in the furnace’s drum is not functioning properly; without this device or if it is damaged, the water quality inside the furnace is inadequate. The furnace is in an abnormal operating condition, such as a water-overflow accident or steam-water flooding. There is a leakage somewhere in the feed water pipe leading to the drum
1) The quality of boiler water and feedwater is substandard； 2) Sudden changes in boiler load, steam pressure, and water level ； 3) Deterioration of quality of cooling water ； 4) Unreasonable control of chemical dosing in the boiler ； 5) Defects in various components of the steam and water separator ；
1. Unqualified feedwater quality 2. Sudden changes in boiler load, steam pressure, and water level 3. Deterioration of quality of the desuperheating water
What are the reasons for the unsatisfactory silicon and salt content in steam? 1) The quality of boiler water and feedwater is substandard ； 2) Sudden changes in boiler load, steam pressure, and water level ； 3) Deterioration of quality of cooling water ； 4) Unreasonable control of chemical dosing in the boiler ； 5) Defects in various components of the steam and water separator.
1) The quality of boiler water and feedwater is substandard； 2) Sudden changes in boiler load, steam pressure, and water level ； 3) Deterioration of quality of cooling water ； 4) Unreasonable control of chemical dosing in the boiler ； 5) Defects in various components of the steam and water separator ；
1) Unqualified feedwater quality 2) Sudden changes in boiler load, steam pressure, and water level 3) Deterioration of quality of the desuperheating water
1. The quality of the boiler feed water is unsatisfactory； 2. Sudden changes in boiler load, steam pressure, and water level ； 3. Cracking of cooling water quality ； 4. Unreasonable control of chemical dosing in the boiler ； 5. Defects in various separation components of the soda water separator.