Thread Content
This post was last edited by Xiao Yu on April 5, 2018, at 22:20. Learn from the best practices in the “Brothers” section. There are rewards for correct answers; everyone who participates gets a reward. Let’s grow and mature through these Q&A sessions. Short-answer true/false question: Steps for replacing the preheating burner with a process burner: After heating the gasification furnace to 1200 degrees Celsius and maintaining that temperature for about 4 hours, replace it with a process burner. ⑴Establish a circulation system for the cooling water hoses of the process burner, verify that the pressure and flow rates are normal, and ensure that the interlock tests pass. ⑵ Fuel to be used when stopping the preheating burner: Close the fuel flow control valve, open the nitrogen valve for purging and then close it, and stop feeding air into the furnace. Confirm that the main fuel gas control valve can be properly operated in the closed position; close the on-site manual valve for the main fuel gas, and direct the fuel gas to in front of the valve. (3) Adjust the steam supplied to the startup extractor, maintaining a slight negative pressure of 6–10 mmH2O in the gasifier. (4) Remove the preheating burner and install the process burner, which is now ready for installation, at the gasifier nozzle. Be careful to prevent the degreasing flange on the oxygen pipeline from being contaminated again during lifting. (5) Supply cooling water to the burner; switch the cooling water tee valve from a hose to a rigid pipe, and close the manual valve for the cooling water hose of the burner. Once the flow rate, pressure, and operation of the burner cooling water are stable, the interlock for the burner cooling water system is activated. (6) The process burners are ignited in logical sequence; after a comprehensive inspection to confirm everything is correct, some interlocks are activated. (The timing of activating the pressure and temperature interlocks is still to be determined.) (7) To ensure that the entire replacement process is safe, orderly, stable, and rapid, simulations should be carried out in advance, along with the preparation of contingency plans and scenarios for potential accidents.