Our facility has been in operation for over a month now, and problems have arisen. Please give me some advice
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The pressures before and after the acid gas combustion furnace in our plant used to be very stable. In recent times, the fluctuations have been quite large. Furthermore, it was observed that when the amount of acidic gas and the air supply were correspondingly reduced, the system pressure increased. When the amount of acidic gas and the air supply increase accordingly, the system pressure decreases as a result. I analyze that the reason might be something not working smoothly somewhere in the system. I guess the first and second reactors may have sulfur buildup, or the capturer is not functioning properly. Please help to solve this issue
I don’t think sulfur accumulation in the reactor is likely; it might be caused by an issue with the liquid sulfur system. Therefore, it is recommended to check whether there are any issues with the various sulfur discharge ports
When the amount of acidic gas and the air supply are correspondingly reduced, the system pressure increases. When the amount of acidic gas and the air supply increase accordingly, the system pressure decreases as a result. This sentence is a bit contradictory. Was it said the wrong way, OP? You suspect sulfur accumulation in the first and second stage catalysts – do you have any analysis data for the gas exiting the second stage? We have a second outlet on our device, from which samples are taken every 4 hours. By the way, what is the outlet temperature when you shift the bed from stage 1 to stage 2? Is it at the specified value?
Reply to 2# Clauspolunit: Could you provide some explanation?
Reply to 3# Hu Laoqian: Oh, I was referring to the pressure on our acidic gas combustion furnace. When the amount of acidic gas and the air supply are correspondingly reduced, the pressure on the furnace increases. When the volume of acidic gases and the air supply increase accordingly, the furnace pressure decreases as well. If the above is not the case, it’s possible that there is a problem with our gauge, but the pressure throughout the entire system is indeed much higher than before. The exhaust furnace is also affected; as the pressure in the combustion furnace increases, the air supply to the exhaust furnace increases as well. When the pressure in the combustion furnace decreases, the air supply to the exhaust furnace also decreases. Under normal circumstances, it should be reversed. It can be seen from this that there is definitely an issue with smooth operation somewhere behind the acidic gas combustion furnace. The volume of acidic gas coming from us isn’t very stable; when it was normal in the past, it was just as you said. We don’t have gas analysis data for the second stage; the exit temperature of the first-stage bed is 310, while that of the second-stage bed is 220. Our management here thinks it’s sulfur buildup in the reactor, but I feel something is not right; I can’t explain exactly what it is.
Reply to 5# wangzhe9455: It is recommended that you check the liquid sulfur outlet of each condensation cooler as well as the furnace pressure of the flue gas furnace, and adjust the outlet temperature of the condensation coolers accordingly. Detailed inspection process.
Sulfur accumulation in the reactor; increase the reactor inlet temperature by 20 degrees for 24 hours. Evaporate the sulfur that has condensed on the catalyst.
Reply to 6# adsl121: Okay.
Reply to 8# wangzhe9455: “The exhaust furnace is also affected; as the pressure in the combustion furnace increases, the air supply to the exhaust furnace increases as well.” When the pressure in the combustion furnace decreases, the air supply to the exhaust furnace also decreases. Under normal circumstances, it should be reversed. Is the air supply for your exhaust furnace automated? What parameter is used for automatic air distribution? Please explain in detail. I agree with Brother Clauspolunit’s opinion; it’s likely a problem with the liquid sulfur system. There might be sulfur accumulation somewhere in the system’s pipelines, forming small sulfur seals, or there could be issues with the heating of the liquid sulfur lines, as well as questions regarding whether the sulfur seal tanks are functioning properly. Furthermore, check whether the cooler is leaking There is also a high possibility that the converter is clogged; it’s not necessarily due to sulfur buildup, but it could also be carbon deposition resulting from fluctuations in your operation. Wait.
The poster’s claim is illogical. If that were the case, could it be possible that there is a liquid seal at some point in the process from the acidic gas combustion furnace to the exhaust gas incinerator, and that at low load levels the height of this liquid seal is high, resulting in high pressure?； Under heavy load, due to the high airflow velocity, some of the liquid in the liquid seal is carried away, reducing the height of the liquid seal and thereby lowering the pressure. It should be noted that a 1-meter water column can generate a pressure of 0.01 MPa, which is a considerable pressure when compared to the operating pressure in acid gas combustion furnaces.
Reply to 9# Shandong Huaxing: Our fans are all variable-frequency; they do not have automatic air distribution. Because when the furnace pressure rises, with the same frequency conversion, the air supply also decreases.