Problems with the acidic gas separation tank in wastewater stripping……
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The flow meter used in our unit for measuring the acidic gas flow in wastewater stripping is a orifice plate flow meter; it keeps breaking down and cannot be repaired – we suspect ammonium salt crystallization is to blame! I wonder what type of flowmeter everyone is using? How’s it going? Another issue is that the remote level sensing for the liquid level in the separation tank uses a double-flange design, and the readings are often inaccurate; upon inspection, it turns out that crystallization has occurred. Do these two problems indicate that the heating temperature of our separation tank is too low? I’m a beginner; I hope everyone can give me some guidance!
Reply 1# qrcl: Is only acidic gas emitted from the top of the tower? Does the ammonia stripped under reduced pressure also come out from the top of the tower? If only acidic gas is produced, the tower top temperature is too high; it needs to be reduced to ensure the purity of the acidic gas ； The flow meter can choose a target that helps to avoid blockages in the pressure guiding tube ； The liquid level in the separation tank can be measured in a way that allows for isolation of the medium, thereby preventing crystallization-related blockages ；
It depends on what type of stripping tower it is. In the case of a pressurized acidic water stripping tower, there are no issues with the acidic gas; its purity is relatively high, with low levels of ammonia and water, so crystallization is unlikely to occur. However, in the case of an atmospheric-pressure acidic water system, crystallization is very likely to take place, which requires proper heating, including heating for the instrument connections as well
A single-tower pressurized side-line extraction process is being used. The amount of acidic water has always been very low, and the loading on the stripping unit is minimal. The temperature at the top of the tower is difficult to control and remains around 110 degrees. Could it be that too much ammonia is being removed from the top of the tower?
The temperature at the top of the tower is too high. Under normal conditions, as indicated in the relevant documentation and according to our company’s operating procedures, this temperature should be between 40 and 45 degrees. If the temperature is too high, ammonia will escape from the top of the tower, which could lead to the problems we’re talking about. If you have time, consider purchasing a book from Sinopec Press; it might be helpful!!
Reply to 5# daiqijun0000: Okay! Thank you!……