Looking for the operating procedures for starting up a heating furnace?

What the poster is referring to is the heating furnace used to start up the process in ammonia synthesis – it is used for igniting the furnace when raising the temperature in the synthesis tower, as well as for shutting down the furnace after the temperature has been raised. 1. Commissioning of the heating furnace: 1. Check whether the heating furnace system meets the process requirements. (P) Confirm that the first two valves before the fuel gas enters 102-B are in the closed state. (P) Confirm that all valves are in the closed position after entering the 102-B fuel gas isolation valve. (P) Confirm that the fire-resistant masks and gloves are in good condition and ready for use. (P) Verify that the fire viewing hole is intact and closed. (P) Verify that the damper is in good condition. (P) Confirm that the first valve leading to 102-B is open. (P) Confirm that the burner is properly installed. (P) Confirm that fire-fighting equipment is complete and in good working condition. (P) Confirm that the combustible gas alarm has passed the test. (P) Verify that the flue damper switch is flexible and operates in the correct direction. (P) Confirm that the ignition gun is in good condition and ready for use. (P) Verify that all fittings in the fuel gas pipeline are properly connected. (M) Confirm that the off-furnace fuel gas pressure PCV-34 is normal and stable. (P) Confirm that the fuel gas flow meter FI-28 is in good condition. (I) Confirm that the fuel gas quick shut-off valve MIC-17 is functioning properly. (I) Confirm that the 105-D warm tower is qualified and ready for ignition. Open the process gas inlet valve at 102-B on-site to a valve position of around 30% for SP-70, to ensure that FI-62 is >45000 m3/h. (I) Confirm that the flow rate and temperature indications of the process gas entering 102-B are normal. (I) Confirm that the interlock FSL-85 has passed the verification. (I) Confirm that the alarm system is functioning properly. (I) Confirm that the instrument is operating properly and showing correct readings. (M) Verify that the grounding in the furnace area meets the requirements. 2. Furnace purging (P): Verify that the stop valve for the purge steam at 102-B is open, that the two valves leading into the boundary zone are closed, and that the drain between the valves is open. Slowly open the first valve for purging steam; once the drain venting is operating properly, close the drain valve completely. (P) Confirm that the flue dampers are fully open. Open the second valve for purge steam and confirm that steam is visible at the chimney. (P) Confirm that the system is purged for 15 minutes. Close the two stop valves for purge steam, and keep the intermediate drain fully open. 3. If the analysis of the furnace explosion gas is satisfactory (M), contact Sinochem personnel to take samples of the furnace explosion gas. (P) Cooperate with supervised sampling. (M) Confirm that the analysis of the furnace explosion gas is satisfactory; combustible gas present

This post was last edited by snowdfr on 2009-5-5 09:27. Our plant uses the Topsoe S-300 technology for the production of 300,000 tons of synthetic ammonia per year; steps for starting up the heating furnace

This post was last edited by HaiChuan Coal Chemical Industry on 2009-5-5 09:06. Time: Year Month Day Hour Shift: Position: Synthesis Equipment ID: Refrigeration Unit 102-B. Initial state: S0. Verification before igniting 102-B: 1. Check whether the heating furnace system meets the process requirements. (P) Confirm that the first two valves before the fuel gas enters 102-B are in the closed state. (P) Confirm that all valves are in the closed position after entering the 102-B fuel gas isolation valve. (P) Confirm that the fire-resistant masks and gloves are in good condition and ready for use. (P) Verify that the fire viewing hole is intact and closed. (P) Verify that the damper is in good condition. (P) Confirm that the first valve leading to 102-B is open. (P) Confirm that the burner is properly installed. (P) Confirm that fire-fighting equipment is complete and in good working condition. (P) Confirm that the combustible gas alarm has passed the test. (P) Verify that the flue damper switch is flexible and operates in the correct direction. (P) Confirm that the ignition gun is in good condition and ready for use. (P) Verify that all fittings in the fuel gas pipeline are properly connected. (M) Confirm that the off-furnace fuel gas pressure PCV-34 is normal and stable. (P) Confirm that the fuel gas flow meter FI-28 is in good condition. (I) Confirm that the fuel gas quick shut-off valve MIC-17 is functioning properly. (I) Confirm that the 105-D warm tower is qualified and ready for ignition. Open the process gas inlet valve at 102-B on-site to a valve position of around 30% for SP-70, to ensure that FI-62 is >45000 m3/h. (I) Confirm that the flow rate and temperature indications of the process gas entering 102-B are normal. (I) Confirm that the interlock FSL-85 has passed the verification. (I) Confirm that the alarm system is functioning properly. (I) Confirm that the instrument is operating properly and showing correct readings. (M) Verify that the grounding in the furnace area meets the requirements. 2. Furnace purging (P): Ensure that the isolation valve for the purge steam at 102-B is open, that the two valves leading into the boundary zone are closed, and that the drain valve between them is open. Slowly open the first valve for purging steam; once the drain venting is operating properly, close the drain valve completely. (P) Confirm that the flue dampers are fully open. Open the second valve for purge steam and confirm that steam is visible at the chimney. (P) Confirm that the system is purged for 15 minutes. Close the two stop valves for purge steam, and keep the intermediate drain fully open. 3. The analysis of the furnace explosion gas is satisfactory (M); contact Sinochem personnel to take samples of the furnace explosion gas. (P) Cooperate with supervised sampling. (M) Confirm that the analysis of the gases from the furnace explosion is satisfactory: combustible gas level at 45,000 TI—89; temperature        ℃