What is the function of the secondary condenser installed in advance in the tower?
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What is the function of the secondary condenser installed in advance in the tower?
The light components are separated, thereby reducing methanol loss
The main purpose is to condense the light components in the non-condensable gas coming from the primary condenser, namely the alkane oils, and also to recover the small amount of methanol that remains uncondensed in the gas； Thereby ensuring product quality and preventing methanol loss ；
Can’t a cooler achieve the purpose of cooling? The inlet valve for the circulating water of our company’s first cooler is set to a slight opening level; why can’t it be opened further? Why is it necessary to add another valve? Additionally, the inlet valve for the circulating water of our second cooler is also set to a slight opening level. I hope everyone will come and discuss it.:victory: :victory: :victory: :victory:
Control the temperature appropriately to separate the light components while reducing methanol loss.
The second cooling stage is primarily used to recover methanol from the light components. When the load on the first cooling stage is too high, the phase change at the top of the pre-distillation tower becomes excessive, resulting in negative pressure; this causes the light components to rise upward and disrupts the distillation equilibrium.
The functions of the two condensers in the pre-tower are as follows: The primary condenser is used to condense the majority of the methanol in the gas phase, allowing it to enter the reflux tank, while the light components remain uncondensed. Therefore, the condensation temperature is controlled at around 63 degrees; if it is too high, it can increase the load on the secondary condenser and lead to greater losses, whereas if it is too low, the light components will be condensed and returned to the system, failing to achieve the goal of removing them. Secondary condenser: It condenses the uncondensed methanol and light components from the primary condenser, sending them to the extraction tank in order to recover methanol and obtain a by-product—methanol oil
The second floor and the upper floors are described in more detail
I’m not too sure. If it’s under negative pressure, the heavier components should rise, right? If it’s the lighter components, isn’t that better? Isn’t the pre-distillation tower meant to separate out the lighter components? Please be more detailed, thank you
Secondary condensation involves condensing the gaseous fraction that was not condensed in the primary stage. This prevents overcooling from cooling the non-condensable gases, and it also avoids waste resulting from excessive temperatures that prevent the gaseous components in crude methanol from being condensed and vented!