Is the water purified by sewage stripping not up to standard?
Thread Content
Cold feed temperature: 20 degrees; hot feed temperature: 146 degrees. The pressure at the top of the tower decreased from 0.5 MPA to 0.4 MPA. The temperature at the bottom of the tower is 153 degrees. At 1 minute, the pressure was 0.36 MPA; at 2 minutes, it was 0.31 MPA; at 3 minutes, it was 0.2 MPA. 11 tons were withdrawn via the side stream. 72 cubic meters per hour of acidic gas were sent for sulfur removal, with 97% hydrogen sulfide in that acidic gas. Currently, the purified water does not meet the required standards. I would appreciate advice from those with more experience on how to make adjustments I thank you here
Too little information was provided; it’s impossible to determine where the problem lies Do you mean that the failure is due to high ammonia nitrogen or high sulfides? What is the processing load, and what is the design load? How is the feeding situation, and what is the designed feeding method? It can’t be solved without clear explanation. It is recommended to increase the amount of steam at the bottom of the tower, as well as the amounts taken off via the side streams and at the top of the tower; in particular, increasing the amount taken off via the side streams. Let’s see if this will have an effect. Here’s a clue: In a wastewater stripping tower, the temperature distribution from top to bottom generally follows a certain pattern. By comparing it with the normal pattern, it’s possible to determine where the temperature distribution is abnormal. From there, it’s possible to figure out what is affecting that area’s temperature distribution, and thus solve the problem.
Please provide the phenomena and data, so that we can analyze the reasons for you.
1. First, it is necessary to maintain the pressure in the tower in order to keep the temperature at the bottom of the tower. Also, it is important to check whether there are any issues with the installation of the trays, and whether the gas phase cannot rise properly 2. What is the processing capacity? What is the steam volume? Can the tower pressure be increased? Does increased side-line extraction carry water? 153 degrees at the bottom of the tower; it’s difficult for the purified water to meet the standards. 3. Was it the surging pressure that caused problems with the tray, leading to a drop in pressure? If this continues, it is recommended that the person in charge stop operations to fix the issue, purge the system thoroughly, open the tower, clean the trays, and reinstall them.
What do you mean by unqualified? Ammonia nitrogen or sulfides? Next, we will discuss in detail the conditions of the device, including the load and the original specifications. I agree with what was said on the second floor: it is recommended to increase the steam flow at the bottom of the tower, as well as the amount of material taken out via the side streams and from the top of the tower – in particular, the amount taken out via the side streams should be increased. If the ammonia nitrogen level is not within the required range, try replacing the outlet used for taking material out via the side streams.
The information you’ve provided is indeed too limited; it’s not clear whether it’s high ammonia nitrogen or high hydrogen sulfide I don’t know what the side line withdrawal rate and circulation ratio are, nor the ratio of hot to cold feed. What is the maximum load that can be handled? Try setting the bottom temperature around 158 degrees