Seek operating techniques for sieve plate distillation towers

Learn more*, and summarize more. Look up more information on distillation; the principles of distillation are the same. Screen plate distillation towers operate quickly, efficiently, and stably; their design must also be practical. It’s not enough to just operate them well – if there are issues with the design itself, efficient operation will not be possible no matter how well they are operated.

To ensure the rapid, efficient, and stable operation of a sieve plate distillation column, the operating material flow rate should be within the maximum value permitted by the design, but must not exceed it.

It is said that once the distillation tower is up and running stably, no further operations are required; just conducting regular inspections is sufficient~

As long as it returns to normal, that’s fine; just ensure that all parameters are within the required ranges according to the specifications

The distillation tower is a system-related issue! It can’t be explained in just one or two sentences. First, there’s the design of the tower; the designs of the reboiler, condenser, and control system all play a role in how well the tower functions! Of course, operational requirements are essential. It is recommended that Shanghai Chuan Duo read more books on distillation towers!

Different materials and different processing procedures impose varying requirements on tower equipment. However, it is generally desired that tower equipment have high separation capacity, large production capacity, and stable operation. For a standard tower unit, installation issues may prevent it from meeting the above requirements. Elements such as the tower body, tray, and overflow opening, if not installed properly, can all have an impact on the distillation process. (1) Tower body: The tower body must be vertical; the allowable inclination is generally no more than one in a thousand. Otherwise, dead zones will form on the tray surfaces. In the case of distillation towers with small diameters, if the trays are installed in sections first and then assembled, any deviation in the verticality of the tower body will directly affect the levelness of all the trays in the tower, thereby reducing its efficiency. (2) Tray: The tray must be level, and its levelness, as measured with a level, shall not exceed ±2 millimeters. If the tray is not level, it will result in uneven liquid layer heights on the tray surface. The rising steam inside the tower can easily pass through the areas where the liquid layer is shallower, thereby reducing the efficiency of the tray. (3) Overflow port: The distance between the overflow port and the lower tray is determined based on the production capacity and the height of the overflow weir of the lower tray. However, it is necessary to ensure that the overflow port is inserted into the liquid in the receiving tray in order to seal off the rising steam. If the overflow port is too close to the lower tray, it may prevent the reflux from the upper trays from flowing properly into the lower trays. This leads to an increase in the liquid level in the upper trays and an increase in pressure in the lower trays; in severe cases, this can result in flooding. If the overflow port is too high, exceeding the height of the overflow weir, the rising steam takes a shortcut, rising directly from the overflow pipe to the upper tray levels, failing to provide a liquid seal and thus affecting the efficiency of the trays. During installation, various specific types of trays have different requirements; failing to follow these requirements may result in a **decrease in the tower’s production efficiency**.