(Daily Question) Coal-to-oil and olefins forum, March 20, 2018
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This post was last edited by Xibei Guyan on 2018-3-21 at 22:02. 3.jpg Participation: Reward of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Question: (DMTO) Olefin separation unit: Why are plate-fin heat exchangers used in the cold box? The olefin separation section, which is part of the cryogenic tank system used for methane and hydrogen separation, has multiple heat exchange streams, and the gas-liquid mixed phases within these streams can flow in countercurrent, co-current, or cross-flow patterns. When heat exchange between multiple media is required within a cold box, including gas-gas, gas-liquid, and liquid-liquid exchanges, plate-fin heat exchangers offer a large heat exchange area, a small temperature difference for heat transfer, a compact structure, reduced space requirements, and low cooling losses when combined. Therefore, plate-fin heat exchangers are used. Note: The answers will be released automatically in two days!
The olefin separation section, which is part of the cryogenic tank system used for methane and hydrogen separation, has multiple heat exchange streams, and the gas-liquid mixed phases within these streams can flow in countercurrent, co-current, or cross-flow patterns. When heat exchange between multiple media is required within a cold box, including gas-gas, gas-liquid, and liquid-liquid exchanges, plate-fin heat exchangers offer a large heat exchange area, a small temperature difference for heat transfer, a compact structure, reduced space requirements, and low cooling losses when combined. Therefore, plate-fin heat exchangers are used.
In the ethylene cold separation section, there are more than a dozen types of heat exchangers used in the cryogenic box system for methane-oxygen separation; multiple fluid streams exist in gas-liquid mixed phase, and these streams can flow in counterflow, co-current, or cross-flow patterns. Heat exchange between 2 to 9 different media is required within a cryogenic chamber, including gas-gas, gas-liquid, and liquid-liquid exchanges; the temperature range needed is from +30°C to -170°C, which is why plate-fin heat exchangers are used.
In the ethylene cold separation section, there are more than a dozen types of heat exchangers used in the cryogenic box system for methane-oxygen separation; multiple fluid streams exist in gas-liquid mixed phase, and these streams can flow in counterflow, co-current, or cross-flow patterns. Heat exchange between 2 to 9 different media is required within a cryogenic chamber, including gas-gas, gas-liquid, and liquid-liquid exchanges; the temperature range needed is from +30°C to -170°C, which is why plate-fin heat exchangers are used.
Answer: The olefin separation section, which is part of the cryogenic box system used for methane and hydrogen separation, has various heat exchange streams. Within these multiple streams, the gas-liquid mixture can flow in countercurrent, co-current, or cross-flow patterns. When heat exchange between multiple media is required within a cold box, including gas-gas, gas-liquid, and liquid-liquid exchanges, plate-fin heat exchangers offer a large heat exchange area, a small temperature difference for heat transfer, a compact structure, reduced space requirements, and low cooling losses when combined. Therefore, plate-fin heat exchangers are used.
There are multiple gas-liquid mixed phases within the flow system, which can exist in three flow patterns: counterflow, co-current, and cross-flow. It requires heat exchange between 2–9 different media within a cryogenic chamber, including gas-gas, gas-liquid, and liquid-liquid exchanges. Therefore, the cold box uses a plate-fin heat exchanger
Answer: The olefin separation section, which is part of the cryogenic box system used for methane and hydrogen separation, has various heat exchange streams. Within these multiple streams, the gas-liquid mixture can flow in countercurrent, co-current, or cross-flow patterns. When heat exchange between multiple media is required within a cold box, including gas-gas, gas-liquid, and liquid-liquid exchanges, plate-fin heat exchangers offer a large heat exchange area, a small temperature difference for heat transfer, a compact structure, reduced space requirements, and low cooling losses when combined. Therefore, plate-fin heat exchangers are used.
In the ethylene cold separation section, there are more than a dozen types of heat exchangers used in the cryogenic box system for methane-oxygen separation; multiple fluid streams exist in gas-liquid mixed phase, and these streams can flow in counterflow, co-current, or cross-flow patterns. Heat exchange between 2 to 9 different media is required within a cryogenic chamber, including gas-gas, gas-liquid, and liquid-liquid exchanges; the temperature range needed is from +30°C to -170°C, which is why plate-fin heat exchangers are used.