【Q&A Question 116】April 26, 2018
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【Q&A Question 116】April 26, 2018: Briefly explain why a superheat value for steam is specified when starting and stopping a steam turbine If the superheat of the steam is low, during startup, due to a significant drop in temperature in the earlier stages, the temperature in the later stages may drop to the saturation temperature at that pressure, causing the steam to become wet steam. Steam containing water poses a severe threat to the blades; therefore, it is safer to keep the superheat of the steam at 50–100°C during startup and shutdown processes. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) The validity period for this question is 48 hours; within those 48 hours, 10 wealth points are awarded for correct answers and 2 wealth points for incorrect answers ； If a response is given after 48 hours, the score is halved, regardless of whether it is correct or not ； 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 started! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
If the superheat of the steam is low, during startup, due to a significant drop in temperature in the earlier stages, the temperature in the later stages may drop to the saturation temperature at that pressure, causing the steam to become wet steam. Steam containing water poses a severe threat to the blades; therefore, it is safer to maintain the superheat of steam at 50–100°C during startup and shutdown processes.
If the superheat of the steam is low, during startup, due to a significant drop in temperature in the earlier stages, the temperature in the later stages may drop to the saturation temperature at that pressure, causing the steam to become wet steam. Steam containing water poses a severe threat to the blades; therefore, it is safer to maintain the superheat of steam at 50–100°C during startup and shutdown processes.
If the superheat of the steam is low, during startup, the temperature of the earlier stages drops significantly, and the temperature of the later stages may fall to the saturation temperature corresponding to that pressure, turning the steam into wet steam. Wet steam poses a serious threat to the blades; therefore, it is safer to maintain a superheat of 50–100°C during startup and shutdown processes.
If the superheat of the steam is low, during startup, due to a significant drop in temperature in the earlier stages, the temperature in the later stages may drop to the saturation temperature at that pressure, causing the steam to become wet steam. Steam containing water poses a severe threat to the blades; therefore, the superheat of the steam must be controlled during startup and shutdown
If the superheat of the steam is low, during startup, due to a significant drop in temperature in the earlier stages, the temperature in the later stages may drop to the saturation temperature at that pressure, causing the steam to become wet steam. Steam containing water poses a severe threat to the blades; therefore, it is safer to maintain the superheat of steam at 50–100°C during startup and shutdown processes.
If the superheat of the steam is low, during startup, due to a significant drop in temperature in the earlier stages, the temperature in the later stages may drop to the saturation temperature at that pressure, causing the steam to become wet steam. Steam containing water poses a severe threat to the blades; therefore, it is safer to maintain the superheat of steam at 50–100°C during startup and shutdown processes.
If the superheat of the steam is low, during startup, due to a significant drop in temperature in the earlier stages, the temperature in the later stages may drop to the saturation temperature at that pressure, causing the steam to become wet steam. Steam containing water poses a severe threat to the blades; therefore, it is safer to maintain the superheat of steam at 50–100°C during startup and shutdown processes.
If the superheat of the steam is low, during startup, due to a significant drop in temperature in the earlier stages, the temperature in the later stages may drop to the saturation temperature at that pressure, causing the steam to become wet steam. Steam containing water poses a severe threat to the blades; therefore, it is safer to maintain the superheat of steam at 50–100°C during startup and shutdown processes.
If the superheat of the steam is low, during startup, due to a significant drop in temperature in the earlier stages, the temperature in the later stages may drop to the saturation temperature at that pressure, causing the steam to become wet steam. Steam containing water poses a severe threat to the blades; therefore, it is safer to maintain the superheat of steam at 50–100°C during startup and shutdown processes.
If the superheat of the steam is low, during startup, due to a significant drop in temperature in the earlier stages, the temperature in the later stages may drop to the saturation temperature at that pressure, causing the steam to become wet steam. Steam containing water poses a severe threat to the blades; therefore, it is safer to keep the superheat of the steam at 50–100°C during startup and shutdown processes.