Gas source interlock
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Why must the air supplies for the slag collection valve and the slag discharge valve in the lock hopper be interlocked? When the air supply to the slag discharge valve is shut off, the control room for the slag collection valve cannot be opened. . . . Please ask an expert to explain. . . Thank you
This is surely based on safety considerations! It has to do with the operating conditions of the lock hopper, which operates in a cycle of \"high pressure――normal pressure――high pressure\", while the gasification furnace remains under high pressure and the slag pool is at normal pressure. To prevent accidents caused by accidental operations, it is required that the inlet of the lock hopper be closed when the outlet is open, and the inlet be closed when the outlet is open ； This security requirement can be met in two ways: one is by working with the lockbox logic program, but manual handling of the lockbox still carries a risk of errors; therefore, a second method was developed ； The second method is pneumatic interlock: it uses physical means (pneumatic circuits) to ensure that at any given time only one of the inlet and outlet valves can be actuated by air, thus guaranteeing 100% that only one valve will operate. You can ask the experienced workers or your technical staff about this………………
Thank you. . . Well said. . . . . That makes sense. . . .