Interlock issues in sulfur production furnaces
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When acidic gas triggers a chain flare, can the chain reaction be stopped directly while keeping the air supply unchanged, by opening the shut-off valve for the acidic gas entering the sulfur removal furnace so that all of the acidic gas can be directed there? Or, when acidic gases are normally flowing into the sulfur production furnace, the air line shut-off valve fails and closes completely. Can the air line shut-off valve be opened directly to allow the gases to flow into the sulfur production furnace? Could these two phenomena cause an explosion?
After the interlock is triggered, the air is also cut off for venting! After the interlock is turned off, it is possible to adjust the flow rate of material entering the furnace again. However, it is necessary to maintain stability in the flow of acidic gas; if there are fluctuations in the amount of acidic gas, it will be very difficult to adjust the air supply accordingly, and the problems that arise from large fluctuations can be extremely difficult or even impossible to resolve. If the acidic gas is not isolated and the wind stops, the wind can still be used to drive it; the problem is the same as above. But neither of these two assumptions of yours seems to hold true; without interlocking, only the air or acidic gases can be shut off, as there are too many subsequent problems – issues arise with both the absorption tower and the incinerator (it’s also possible that individuals lack sufficient knowledge in this area)
If it’s not a chain failure but merely a fault with the shut-off valve, is it possible to connect it directly to air or acidic gas without performing purging?
We all use low-flow interlocks; the concept of a \"faulty shut-off valve\" isn’t easy to understand, but I get what you mean. If the flow rate only fluctuates outside the set interlock value, then stabilizing the flow rate of the acidic gas or air and making timely adjustments will suffice. Let’s return to the assumption in your question: if there is no acidic gas available but air still flows into the furnace as normal, then the reactor will immediately catch fire and its temperature will rise sharply, causing damage to the catalyst. Do you think it’s still possible to introduce acidic gas into the furnace in time?
Whether it’s a wind interruption or an acidic gas interruption. Process it immediately after the interruption, and shut down the other one that is not interrupted. Remove the linkage, first introduce a small amount of air again, followed by a small amount of acidic gas. Add more air and keep following up; add air and continue to monitor. Monitor the ratio and check the furnace temperature, ensuring it does not exceed the temperature before interlock activation. You can get it back to its original state within three minutes. You can do it this way: if the horizontal alignment isn’t good, just follow the procedures carefully by purging and restarting
There is sulfur vapor in the furnace and the temperature is high; allowing a small amount of ventilation first and then initiating combustion will prevent a flash explosion. Figuring out how much is a small amount is up to you