The temperature cannot be raised in the debutanization tower
Thread Content
The tower bottom section uses steam at 3.6 Mpa as a heat source; there is a condensate tank downstream to handle the condensed water. However, the temperature increase in the tower bottom section is not effective, and the temperature of the condensed water remains high, which in turn causes the temperature in the downstream condensate tank to be high as well. The pressure there is almost equal to that of the steam, resulting in poor flow of steam and little pressure difference between the upstream and downstream sections. What exactly is causing this phenomenon?
It is necessary to ensure exhaust on the process side of the heat exchanger in order to avoid air blockages.
The steam from the heat exchanger was discharged directly into the condensate water without undergoing phase change. Adjust the condensate discharge valve slightly to reduce it, allowing the steam to stay in the heat exchanger for a longer time so that phase change can occur; this will enable the condensate to form a liquid seal within the heat exchanger.
The person upstairs explained both reasons; rule them out one by one. If there is an air blockage in the heat exchanger, no heat exchange will occur. If the opening degree of the condensate drain valve hasn’t changed, then check the heat exchanger.
The corresponding phenomenon is caused by the heat exchanger failing to transfer heat, and the reasons for this lack of heat transfer are roughly as follows: 1. Presence of non-condensable gases in the shell side; 2. Scaling on the heat exchanger; 3. In the case of thermal siphon effect, it is due to an excessively low liquid level in the tower bottom, while in the case of forced circulation, it is due to too low a circulation rate.
3.6MPA heating debutanization tower? It can’t be 0.36, right? Check whether the steam is in a saturated state before entering the heat exchanger. Also, are there any issues with the steam pipeline network? Were heavier oils carried over from the bottom of the butane stripping tower?
Is this the only reboiler in the tower bottom?
I have encountered a situation where esters and oils carried in from upstream acid washing, alkali washing, and water washing accumulated on the inner walls of the heat exchange tube bundle in the isobutane stripping tower, gradually reducing the efficiency of heat exchange. We replaced the tube bundle and cleaned it, and the result was good.