Interlock issue of the return cold liquid level tank
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Our hydrolysis and desorption system’s reflux cold liquid level tank is equipped with a level interlock, which makes operation quite inconvenient. Often, it seems that the entire operating system is functioning normally, yet the liquid level can drop suddenly from several dozen levels or even at full capacity to zero. Adding or removing liquid has no effect; on-site efforts to raise the liquid level also fail, with the reading showing -0.6. It usually takes 20–30 minutes for the liquid level to rise, or even longer. Normally, we keep the desorption vapor phase temperature at around 108–115 degrees. The temperature of the cooling water used for reflux cooling is such that the inlet water temperature is 28–31 degrees, while the outlet water temperature is generally 55–60 degrees. The desorption operation is carried out at a pressure of 0.26–0.29 MPa. In my opinion, local crystallization occurs during reflux cooling in many cases, and this is due to a large temperature difference between the inlet and outlet water temperatures. Dear sea friends, based on what I’ve described, please help me analyze the reasons behind the low liquid level.
Personally, I think just removing the chain mechanism should suffice; making it manual would require more effort
It’s the low liquid level pump shutdown interlock, right? You can just disconnect it on the screen.
It is possible to determine whether the liquid level tank is truly empty or if it is a false reading, by considering the liquid level indication and the operation of the reflux pump.
“In “backflow cooling local crystallization,” is the analysis pressure not above the limit? I personally think it might be a problem with the pressure gauge, which is causing the inaccurate readings
1. The chain can be resected. 2. There is a high possibility of the reflux condenser being clogged. When the liquid level in the low-temperature chiller sump permits, an appropriate amount of carbon-ammonia solution is added to the reflux condenser. 3. The temperature of the reaction gas phase should be maintained at 100–118 degrees, with stability ensured. There should be no major problems then.
As mentioned above, in the case of local crystallization due to backflow cooling, the pressure in the analysis system will definitely increase, and as a result, the level in the backflow cooling liquid level tank will fluctuate significantly. However, it’s also possible that there could be issues with the level gauge when there are slight pressure fluctuations. In such cases, it’s necessary to check the outlet pressure of the analysis backflow pump as well as the level in the circulation liquid level tank. If the level fluctuates, but the outlet pressure of the backflow pump remains stable and the level in the circulation tank doesn’t change either, then it can be confirmed that there is a problem with the level measurement! In my opinion, the composition of the liquid level gauge in the liquid level tank is a bit high, and the temperature control of the cooling water used for reflux is a bit low; it should be increased slightly!
I’ve learned it.* . . . . . . . . . . . . . . . . . . . . .