Analysis of the reason for non-circulation of the mechanical seal flushing oil in vertical mixers
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Vertical mixer, with a rotation speed of 80 revolutions per minute and a shaft diameter of 125. It operates on the principle of thermal siphonage; the liquid in the tank is at full level during operation. The temperature is 80°C and the pressure is 0.3 Mpa. During actual operation, circulation was possible at first, but it was unstable – the fluid flowed from high to low or from low to high. In the past month, no circulation has taken place anymore, the temperature remains high, and the sealing ring on the atmospheric side has failed due to the high temperatures. Who has encountered this or analyzed it? How should it be handled? Currently, a pneumatic pump for forced circulation has been added
Is the height of the tank appropriate? If there’s no circulation, adding a circulation pump would also be a good option
Siphoning has never been used; it’s either forced circulation or flushing with the pressure difference generated by the system itself for cooling
There are requirements regarding the length of the pipe; a shorter length is better. But forced circulation is still reliable