Discussion on the structure of the overhead condenser in distillation towers

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Ladies and gentlemen in the chemical industry, fractional condensers are used very frequently in distillation columns within the field of fine chemicals. The vertical condensers with the following three structures are all natural-reflux fractional condensers. Those who are familiar with the applicable operating conditions for various structures can discuss this together. The editor believes that the outlet (D) of the fractional condenser in structure a is located at the side outlet of the lower tube bank, making it suitable for operating conditions with very low amounts of non-condensable gas. The problem of non-condensable gas accumulation at the top still exists ； The discharge port (D) of the structural type b sub-condenser is located at the top of the condenser, making it suitable for conditions with a slightly higher amount of non-condensable gas. The sampling port (D) of the structure C condenser is located at the top of the condenser, making it suitable for conditions with a large amount of non-condensable gas. In the condenser of structure C, the gas phase and liquid phase flow in counterflow; a problem that arises is flooding when the amount of condensation is high, which affects the heat exchange efficiency. In such cases, it is recommended to use structure B. We welcome everyone to offer different opinions.