The purified water does not meet the standards
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Our system has just been started up, and the sulfur content in the purified water has remained around 70 recently. Each time a sample is taken, the purified water appears transparent, with no flocs or similar substances, but there is a lot of foam. Could you please explain why it does not meet the standards?
This water treatment process requires matching the type of chemicals to be used and their dosage based on your actual incoming water sample. The problems that arise are either due to harmful elements in the untreated water exceeding the specified limits (type, flow rate, and concentration), or they are operational issues. First, it is necessary to confirm that the first possible issue is \"harmful elements in the untreated water exceeding the design limits (type, flow rate, and concentration)\".
The stripping unit primarily relies on distillation; the acidic gas and ammonia evaporate together. The common practice is to increase the steam volume; however, it is difficult to control the composition of the raw water coming from upstream.
Once you identify the root of the problem, you can follow what was mentioned above and do your best to carry out your tasks within your scope of responsibility. As for the matter that \"it’s difficult to control the composition of the raw water coming from upstream.\" ”When you raise the issue above, there should be a solution available there. What I mean is that problems we can’t handle don’t necessarily mean that those above us can’t handle them either. As a water treatment manager, it is necessary to monitor the water coming from upstream. Provide relevant data to superiors. If it really comes to the point of closing in violation of regulations, there must be a solution put in place.
When it just starts running, it sometimes takes some time to adjust.
The normal sulfide level should be below 50 ppm; for stable operation, it should be around 10. Whether operating with a single tower or a double-tower stripping system, it is important to control the top temperature and pressure of the towers. It’s thermal decomposition, a problem of decomposing and absorbing physical properties. Monitoring the quality of acidic water at the source focuses on ensuring that the total oil content is low, so as to prevent it from entering the tower and causing the temperature at the top of the tower to rise excessively.
Just at the start of operations, the main issue is organic sulfur; it’s not easy to analyze, or the methods used for analysis and testing are incorrect.
Try measuring the sulfur content in crude ammonia gas! Appropriately increase the amount of acidic gas extracted!
1. Check whether the sulfide content in acidic water exceeds the design value. 2. Whether the processing capacity exceeds the design load. 3. Is the steam volume at the bottom of the tower too low (steam volume/feed volume = 0.15~0.2)? 4. Is the extraction volume at the tower top too low? 5. Check for leaks in the heat exchange equipment.