Specific steps for igniting a tubular furnace for crude benzene

Hehe, I see that no one has provided a solution yet. I’m quite busy and don’t have time to organize everything; I’ll send you two sets of operating procedures, and you can combine them together. Well, I think that way it will be more comprehensive. First: 7.1 Operation of the tubular furnace 7.1.1 Check whether the valves, cocks, and flue dampers in the gas system, steam system, and oil system are ready for operation. 7.1.2 Ensure the instruments are in good condition. 7.1.3 Steam is introduced into the furnace for cleaning until steam emerges from the upper part of the furnace. 7.1.4 Confirm that the oil washing fluid is circulating properly, and steam has been supplied to the steam pipes inside the furnace. 7.1.5 Open the chimney flap to 1/2 position. 7.1.6 First, light the dedicated ignition gas pipe and place it at the gas nozzle; then open the valve of the gas nozzle. After confirming that the gas has been ignited, light the other nozzles one by one. 7.1.7 Adjust the amount of heating gas, air flow, and the opening degree of the flap valves so that the tubular furnace rises in temperature at a rate of 10–20°C/h; once the furnace temperature exceeds 250°C, the temperature rises at a rate of 30–40°C/h. 7.1.8 The furnace temperature rises steadily, gradually increasing the oil-rich temperature to meet the technical specifications. 7.2 Shutdown procedures for tubular furnaces 7.2.1 Close the gas cocks, main valves, pneumatic control valves, and branch valve; install gas blind flanges if necessary. 7.2.2 Slightly open the chimney flaps and vents to allow the furnace temperature to drop slowly, enabling natural cooling. 7.2.3 If the shutdown duration is no more than 3 days, it is not necessary to drain the oil; otherwise, the oil should be poured into an underground tank and cleaned using steam. Second: 2.9 Commissioning of the tubular furnace 2.9.1 Check that all parts of the tubular furnace are in good condition and that gas supply is normal. 2.9.2 Drain all water from the gas pipeline; if it is being put into use for the first time or after maintenance, purge the pipeline with steam first, and then use gas to displace the steam until a successful explosion test is achieved. 2.9.3 Open the chimney flap to put the furnace chamber under negative pressure. 2.9.4 Open the steam cleaning valve, clean the furnace until large amounts of steam are emitted from the chimney, and then close it. 2.9.5 First supply the ignition source, then introduce gas; after confirmation of ignition, adjust the opening degree of the chimney flap and the gas flow rate to gradually raise the temperature of the tubular furnace to the specified value. 2.9.6 When a tubular furnace is started up for the first time or after a long period of inactivity, it should be preheated using a temporary gas pipeline (or by activating one burner) at a low temperature. Only after the furnace temperature rises slowly (over 2–4 hours) to 150°C can the furnace be officially ignited and put into operation. 2.10 Shutdown of the tubular furnace 2.10.1 Upon receiving the shutdown order, gradually close the gas inlet valve and the main shut-off valve of the tubular furnace to stop heating. 2.10.2 When the furnace temperature drops below 300°C, fully open the chimney flaps. 2.10.3 In the event of a long-term shutdown, the oil pipes shall be cleaned with steam, and the gas pipes shall be purged with steam. If you have any further questions, you can add me on QQ at 39135623 so we can discuss them together; mention the forum name when adding me.