Stripper problem

Is it because the liquid outlet temperature cannot be raised? The reason for eliminating steam may be: The bottom liquid level of the stripping tower LV9202 is actually very high, but the display is not high. ； There is a problem with the ingredients in the synthesis tower. The water-to-carbon ratio is too high. ； Although the pressure of the steam is not low, is it mixed with non-condensable gases, such as hydrogen, nitrogen, etc.? Are the tubes of the stripping tower severely scaled?

This post was last edited by xqwlyx01 on 2009-12-27 18:45. The liquid level of the stripper LV9202 should not be very high. Some time ago, when the tower was stopped for a long time, the lowest liquid level displayed by LV9202 was around 70%. Now the liquid level controlled when the system is running is more than 85%. Ammonia to carbon ratio is 3.3: 1 or so. Water to carbon ratio is 0.6: 1 or so. It's not clear whether the steam is non-condensable or not. It is not clear whether there is scaling or not. It hasn't been serviced for a long time. At the same time, there is another phenomenon. It's just that the pressure in the synthesis tower is always low. The synthesis tower outlet HV9203 is very closed. The PV9207 on the high-pressure circle is also very closed, but the pressure just won't come up. Sometimes it is as low as 14.8MP, and usually below 15.3MP. The indicator is 15.3--15.9MP. . The medium pressure has been very low in the past two days. Around 1.63. Medium pressure venting is only about 48%

3# xqwlyx01 Based on your description, I think the system is more likely to be scaled!

1. First analyze the stripping efficiency. Has the urea concentration decreased? This will confirm whether the temperature indication is distorted. 2. If the stripping efficiency is indeed reduced, in addition to the component factors, it is also possible that the stripping tower is unevenly distributed. This phenomenon is caused by the high top temperature. It is usually caused when the load fluctuates greatly. 3. Our factory also encountered an issue where the temperature could not be raised. The final inspection revealed that the temperature detection problem was caused by severe scaling of the thermocouple sleeve.

Analysis of the stripper liquid was not done. But I'm sure it's not a problem with the temperature indicator. Because the medium voltage load is indeed heavy. And according to what you said, it shouldn't be a problem of uneven distribution of the stripper. The top problem has been low recently. Also, this problem has been going on for several days. But it’s a matter of a single class. This has always been the case