CO2 stripping urea, the problem of the urinary tower liquid level gauge malfunctioning during driving after a long stop

We can judge the gas and liquid temperature of the synthesis tower, the system pressure, the steam consumption of the stripping tower, and the most important thing is that a certain load corresponds to a certain valve opening of HV201 and LV203. We should also pay attention to the pressure of the low-pressure gas bag. After the ammonia adding pump and the methylammonium pump are frequency-converted, the liquid level rises quickly. We should rather have the synthesis tower full of liquid than the stripping tower without material. This post was last edited by lxq700918 on 2009-2-7 21:58 ]

You should contact the instrument for processing in time, if it cannot be handled! It is recommended to park the car ； Come for maintenance! (Safety first) Although it can be judged by changes in temperature points and pressure, how can it be accurately controlled and how will it be dealt with later? It can only be said that after the system is fed, (or malfunctions during normal production), the liquid level is estimated based on temperature changes and time. If it is not yet estimated, make material preparations, contact the instrument for processing as soon as possible, and then rely on past experience to control the valve position a little smaller to buy time for instrument maintenance. If it takes a long time, it will still have to be stopped.

The failure of the liquid level gauge in the urea synthesis tower will have a greater impact on production safety and put greater mental pressure on the operator. For the sake of safe operation, I think: 1. After the liquid level gauge of the urea synthesis tower fails, the production load must remain stable, and adjustments related to liquid level changes should be minimized. 2 Contact the instrument technician for processing ； 3 Pay attention to the temperature and pressure changes of the high-pressure system. Under the premise of stable production, it is better to be high than empty, but not full of liquid. The valve opening can be adjusted according to process changes when the liquid is full and the material is about to be cut off. The actual liquid level of the urea synthesis tower has a large space for change. 4. Pay attention to the relationship between the valve opening, liquid level changes and load at ordinary times. The frequency and amplitude of the valve adjustment should be well-informed so that it can still operate freely after the liquid level gauge of the urea synthesis tower fails.

It is certain to contact the instrument in time for processing. We can put materials into production through experience, and can also perform addition and subtraction operations, but our system cannot reach the best state. After normal production, we can only judge whether the liquid level is full through the liquid outlet temperature of the synthesis tower and the air outlet temperature of the synthesis tower. However, when the liquid level is falling, how long will it take for it to become empty or for the liquid seal to break through? This is difficult to judge because the system changes all the time. At the same time, keeping the synthesis tower full or close to full for a long time is a difficult problem and insurmountable as to how flexible our system can be. I personally think that the best way is to contact the instrument personnel immediately after driving to feed materials. If it can be handled well, then normal production can be carried out. If it is not handled well, you should wait for the personnel capable of handling it to arrive and quickly stop the car for processing. Of course, parking emissions are not excluded and the processing is started!!!!!!