Experienced people are welcome to join! ! What is the relationship between the installation height of the distillation column bottom level gauge and the outlet height of the reboiler?
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Experienced people are welcome to join! ! What is the relationship between the installation height of the distillation column bottom level gauge and the outlet height of the reboiler?
Generally, in a thermal siphon reboiler, the tube sheet is positioned at the liquid level during normal operation of the tower; this level is taken as 50% for the level gauge. Going downward to the horizontal level of the circulation pipe corresponds to 0% liquid level, and by moving upward another 50% brings us to 100% liquid level. That’s all!
Generally, a thermal siphon reboiler is divided into a heating section, a superheating section, and a boiling section. The boiling section is the upper part of the reboiler; its center is usually slightly lower than that of the tube sheet. The liquid level in the tower is at the tube sheet level, creating a height difference between the tower and the reboiler that enables siphoning to occur. This is when the heat exchange area is at its maximum. If the liquid level is too low, a large portion of the heat exchange tubes remains unused ； If the liquid level is too high, the superheating section becomes too long, resulting in excessively high temperatures, while the boiling section remains too short, leading to a relatively low rate of evaporation.
Reply 3# wumian: It should be controlled at around 500 below the tube sheet (for a reboiler with a tube length of 6 meters); in this case, the only factors that affect the evaporation rate of the tower are the temperature of the heating medium in the reboiler and the pressure of the tower.