Synthesis furnace SIS interlock

The SIS (Safety Instrumented System) for the hydrochloric acid synthesis furnace requires the following interlocks: 1. Door-opening interlock: When the door of the hydrochloric acid synthesis furnace is not closed, the SIS system should prevent compressed air or ammonia from entering the furnace chamber. 2. Temperature interlock: When the temperature of the hydrochloric acid synthesis furnace reaches the set value, the SIS should control the operation of the reactor’s heater and cooler. 3. Pressure interlock: The SIS should monitor the pressure inside the reactor and cut off the fuel supply as well as the power to the heater when necessary. 4. Flow interlock: Controlling the flow rate in the reactor is a key aspect in ensuring the proper operation of the hydrochloric acid synthesis furnace. If the flow rate in the reactor exceeds the preset range, the SIS should close the feed valve. 5. Gas detection interlock: The SIS should monitor the presence of chlorine and other harmful gases. Upon detecting these gases, the SIS initiates an emergency shutdown procedure, shutting off the fuel supply and the power to the heaters. .