Safety requirements before starting up the waste gas incinerator
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Our company has an exhaust gas combustion system that burns primarily hydrogen, as well as ammonia and nitrogen. To ensure safety before starting up the system and prevent explosions, how should the operations be controlled? For example, what should be the amount of air supplied, how should ignition take place, and what should be the temperature of the boiler before the exhaust gases enter it? Question!
Different incinerators should have different requirements; it’s not possible to generalize. You need to have a detailed set of operating procedures, which must include: 1. A pre-startup checklist with items to be checked off one by one, such as whether the filters have been cleaned, whether the spraying system is operational, whether the water level in the self-priming pump is normal, whether the air valves are open, whether the pH value is within the normal range, whether the chemical dosing system is functioning properly, and whether the temperature alarms are working correctly ； 2. Records of safety routine inspections should include regular checks on furnace temperature, oil temperature, oil level, etc ； 3. Fault handling records are required ； The above is for reference only!
If an explosive gas comes into contact with a heat source rather than a fire source, I would like to know at what temperature the heat source must reach for an explosion to occur
Nitrogen purge – Air displacement – Start the induced draft fan – Turn on the electronic igniter – Open the exhaust gas inlet valve – Successful ignition – Close the exhaust gas bypass valve – Normal operation. If ignition is unsuccessful (no flame appears after turning on the exhaust switch), immediately close the exhaust valve and open the exhaust bypass valve (to direct the exhaust to the flare system), then repeat the above steps; the order must not be reversed. Answer to floor 3: In a waste heat boiler that uses exhaust gases (hydrogen, ammonia, nitrogen) for heating, unless triggered by an open flame or static electricity, the temperature in the furnace will not cause this mixed gas to explode.
The answers on the 4th floor are based on experience and are not very scientific; they may be misleading^_^ A high-temperature furnace chamber can trigger the mixed exhaust gases. The specific temperature depends on the mixture ratio. Therefore, ignition and shutdown must be carried out strictly in accordance with the safety operating procedures.
It would be great if there were a set of operating procedures.