Burner cooling water issue

These problems generally do not occur, or at least they do not occur in large numbers; moreover, fire-fighting water is available as a precaution.

When the cooling water supply to the burner is interrupted, the interlock \"Burner cooling water flow LL, gasifier shutdown\" is triggered, unless the interlock for the burner cooling water system is disabled. But to date, no manufacturer has dared to take the risk of not installing this protective interlock. As for the situation where \"the burner cooling water pump fails suddenly, the backup pump cannot be started, and the emergency burner cooling water cannot be put into use in time,\" there are only two outcomes: system interlock shutdown ； If interlock shutdown is not possible, the machine should be stopped immediately.

All of these situations need to occur at the same time. It can only indicate one thing. The inspections at your factory are inadequate.

It is possible for this situation to occur. The Texaco process takes this into full consideration, featuring a burner cooling water interlock protection. It will just burn out the burner. Many factories have encountered this.

Under normal operation, if the cooling water supply to the burner is interrupted and the flow rate at the inlet of the burner’s cooling water becomes low, the outlet temperature will be overreported, which triggers a 3-out-of-2 interlock. This causes the shut-off valves for the inlet and outlet of the burner’s cooling water to close, and at the same time a fault alarm for the burner’s cooling water is activated, resulting in the shutdown of the gasifier. If the burner cooling water pump fails suddenly and the backup pump cannot be started, and at the same time the emergency burner cooling water cannot be put into use in a timely manner, this will also result in a lack of cooling water for the burner, causing the gasification furnace to shut down. However, it is unlikely that all these problems will occur simultaneously, or it is almost impossible for them to happen at the same time.

Under normal operation, if the cooling water supply to the burner is interrupted and the flow rate at the inlet of the burner’s cooling water becomes low, the outlet temperature will be overreported, which triggers a 3-out-of-2 interlock. This causes the shut-off valves for the inlet and outlet of the burner’s cooling water to close, and at the same time a fault alarm for the burner’s cooling water is activated, resulting in the shutdown of the gasifier. If the burner cooling water pump fails suddenly and the backup pump cannot be started, and at the same time the emergency burner cooling water cannot be put into use in a timely manner, this will also result in a lack of cooling water for the burner, causing the gasification furnace to shut down. However, it is unlikely that all these problems will occur simultaneously, or it is almost impossible for them to happen at the same time.

It is less likely to occur, but the major interlock that causes the gasification furnace to shut down is triggered whenever the cooling water flow rate to the burner is at LL; therefore, the risk of the burner being damaged as a result is still very low. As for the situation mentioned by the original poster, it can only indicate one thing: there are serious problems with the quality of the backup systems and the level of expertise in operating them at your company.

The accident water system represents the final barrier in the interlock protection system; if all the preceding assumptions are met, then the gasifier will shut down as part of the interlock mechanism. If there is no shutdown, it must be that there is a problem with your interlock tests! The preparatory work before feeding the material was insufficient!