【Daily Question】0914 Foam Entrainment

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This post was last edited by HSLJHZ on 2015-9-15 at 13:56. In order to increase the popularity of the heat exchange section, a \"Question of the Day\" activity has been introduced in the tower equipment section; this helps to foster active technical exchanges while also providing members with certain financial rewards. This is my first attempt at posting; please offer plenty of guidance. 【Daily Question】 (Multiple-choice question) After gas bubbles up through the liquid layer on the tray, it inevitably carries many liquid droplets with it. Some of these droplets are not able to be separated in time and are carried by the upward airflow to the upper tray, a phenomenon known as \"foam entrainment\". Foam entrainment often leads to a decrease in tray efficiency. Its influencing factors include: A) the relative volatility of the mixture, B) the spacing between the tray levels, C) the structure of the trays, and D) the volume of material to be processed. Correct answers: B) C) D) (1) Volume of material to be processed: When the volume of material processed is large, the gas phase load increases as well; the gas velocity inside the tower rises, and mist entrainment becomes more severe. (2) Tray spacing: The tray spacing should not be too small, otherwise the amount of mist entrained will also be high. (3) Tray structure: A good tray structure can control the amount of mist entrainment. Post your answer as a reply; participating in the quiz earns you +2 wealth points (wealth is added automatically – no additional points or comments will be given if your answer is incorrect). If you answer all questions correctly, you’ll receive an additional +3 to +8 wealth points. Extra rewards will also be given if you provide a thorough analysis and explanation of the questions or answers, or if you include detailed calculation processes. If your answer is correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions. Note: We will close this post after 24 hours to announce the answers and explanations, as well as the best response (the best help provided). Attraction Bonus: If you post a topic in this section within two days to provide a detailed explanation of the knowledge points covered in this question, please reply to this post to inform us, and we will have a moderator grant you +Attraction. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights. After registration, we will rank participants based on the content of their posts: the last-place contestant will receive +1 charm, the second-to-last +2 charm, and so on, with the highest score earning +5 charm.