(Daily Question) Coal-to-Oil and Olefins Forum, April 17, 2018
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3.jpg Participation: Prize of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Question: (DMTO) Olefin separation unit: What are the requirements for the liquid level in the recondenser regarding the steam extraction condensing turbine? A too high liquid level reduces the heat exchange area, preventing the turbine exhaust gas from condensing properly ； When the liquid level is too low, it is easy for the feedwater pump to experience cavitation; uncondensed steam is carried along by the feedwater, which reduces the condensation efficiency of the jet pump’s condenser and leads to a decrease in vacuum level. Note: The answers will be released automatically in two days!
The excessive liquid level reduces the heat exchange area, preventing the turbine exhaust from condensing properly； When the liquid level is too low, it is easy for the feedwater pump to experience cavitation; uncondensed steam is carried along by the feedwater, which reduces the condensation efficiency of the jet pump’s condenser and leads to a decrease in vacuum level.
Excessively high liquid levels reduce the area of the heat exchanger, preventing the turbine exhaust gas from condensing properly. On the other hand, excessively low liquid levels can lead to cavitation in the feedwater pump; uncondensed steam is then carried along with the feedwater, which reduces the efficiency of the jet pump condenser and results in a decrease in vacuum level.
Excessively high liquid levels reduce the area of the heat exchanger, preventing the turbine exhaust gas from condensing properly. On the other hand, excessively low liquid levels can lead to cavitation in the feedwater pump; uncondensed steam is then carried along with the feedwater, which reduces the efficiency of the jet pump condenser and results in a decrease in vacuum level.
Excessively high liquid levels reduce the area of the heat exchanger, preventing the turbine exhaust gas from condensing properly. On the other hand, excessively low liquid levels can lead to cavitation in the feedwater pump; uncondensed steam is then carried along with the feedwater, which reduces the efficiency of the jet pump condenser and results in a decrease in vacuum level.
Excessively high liquid levels reduce the area of the heat exchanger, preventing the turbine exhaust gas from condensing properly. On the other hand, excessively low liquid levels can lead to cavitation in the feedwater pump; uncondensed steam is then carried along with the feedwater, which reduces the efficiency of the jet pump condenser and results in a decrease in vacuum level.
The liquid level should be at the normal level; it must not be too high or too low； The excessive liquid level reduces the area of the heat exchanger, preventing the turbine exhaust from condensing properly ； When the liquid level is too low, it is easy for the feedwater pump to experience cavitation; the feedwater carries uncondensed steam, which reduces the condensation efficiency of the ejector pump’s condenser and leads to a decrease in vacuum level.
The excessive liquid level reduces the heat exchange area, preventing the turbine exhaust from condensing properly； When the liquid level is too low, it is easy for the feedwater pump to experience cavitation; uncondensed steam is carried along by the feedwater, which reduces the condensation efficiency of the jet pump’s condenser and leads to a decrease in vacuum level.
Answer: The excessive liquid level reduces the heat exchange area, preventing the turbine exhaust from condensing properly； When the liquid level is too low, it is easy for the feedwater pump to experience cavitation; uncondensed steam is carried along by the feedwater, which reduces the condensation efficiency of the jet pump’s condenser and leads to a decrease in vacuum level.
The excessive liquid level reduces the area of the heat exchanger, preventing the turbine exhaust from condensing properly. When the liquid level is too low, it is easy for the feedwater pump to experience cavitation; uncondensed steam gets entrained in the feedwater, which reduces the condensation efficiency of the ejector pump and leads to a decrease in vacuum level.
If the liquid level is too high, it reduces the area of the heat exchanger, preventing the turbine exhaust gas from condensing properly. If the liquid level is too low, it can lead to cavitation in the feedwater pump; uncondensed steam may be carried along with the feedwater, which reduces the efficiency of the jet pump condenser and results in a decrease in vacuum level.