In Section 1 of our plant, the temperature cannot be increased at 90% load
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In the Nissan 500t ammonia stripping process, the evaporation temperature in the first stage cannot be increased when the load reaches 85%. The problem has not yet been resolved; please suggest solutions.
Can’t raise the evaporation temperature at all? Insufficient steam: The actual opening degree of the valves on site is insufficient, or the drain is blocked. Analyzing the urine concentration: there is too much water. It is possible that the medium-pressure decomposition temperature (158°C) is insufficient, resulting in an inadequate urine temperature in the pre-concentration heat exchanger
It’s also possible that the heat exchange equipment is scaled; check to see if it needs to be cleaned. Last edited by lxq700918 on 2009-4-18 21:10.]
In addition to the situations mentioned on the second floor, it is also necessary to pay attention to whether the temperature in the front section meets the required standards Is there a leak in the heating coil? What is the decomposition effect in the previous section (high ammonia level in urine)?
The steam valve is fully open, and the drain line is also open; there is no change in urine concentration. The medium-pressure decomposition temperature is 166°C, while the low-pressure decomposition temperature is 146°C. The low-pressure steam pressure is 0.47 MPa. The inlet temperature of Stage 1 is only 103°C, and the outlet TC502 temperature is 124–125°C. As for the possibility of scaling in the heat exchanger, it is also low, as the opening degree of TC502 at low load remains unchanged, just as before. This post was last edited by lxq700918 on 2009-4-19 11:19.]
Based on what has been said, the urine pump does not contain water, all valves are functioning properly, and it is unlikely for the equipment to develop scale suddenly; I believe it is the heat exchange tubes that are leaking. Parking is required for inspection
It’s hard to say whether there’s a leak in the tubes, but why is the temperature so low even before evaporation begins?
Take another look to see if the cooler partition is damaged and if water is taking a shortcut. This post was last edited by lxq700918 on 2009-4-19 15:44.]
For the reasons mentioned above. I think it might be a section where water was added. Check all the single-section water supply pipelines.