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Steps to replace the preheating burner with a process burner: Taking a series as an example: After the gasification furnace is preheated to 1100 degrees Celsius and held at that temperature for about 4 hours, it’s time to replace the preheating burner with a process burner. ⑴Establish a circulation system for the cooling water hoses of the process burner; start the burner cooling water pump P--23103, verify that the pressure and flow rates are normal, ensure that the interlock tests pass, and put the standby pump on position “A”. (2) E-23103/23104/23105/23106 and wash tower C-23101 were put into operation, and the discharge process for the process condensate at the bottom of the wash tower was established. The waste pot discharge flash tank and dosing system have been put into normal operation. (3) Feed the process burner cooler E-23107; fill the burner cooling water tank V-23102 with nitrogen, introduce steam, build pressure, and heat the cooling water to 190°C. (4) Check that the valve positions of the control valves and isolation valves for process steam, natural gas, oxygen, protection steam, heating steam, and protection nitrogen are set according to the requirements for feeding material and igniting the furnace. Temporarily disable the transformation system. (5) The natural gas compressor is operating normally; the process natural gas, after desulfurization, exits at the outlets of zinc oxide B-22002A/B. It is vented at PV-1010 in front of the converter. Oxygen has been heated to 180°C in E-23101 and is then vented at HZV-1205. (6) Adjust the steam supplied to the startup extractor, maintaining a slight negative pressure of 6–10 mmH2O in the gasification furnace. Stop using fuel in the preheating burner, close the fuel gas control valve and the stop valve, and close the burner air damper to cease supplying air into the furnace. (7) 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 flanges on the oxygen pipeline from being contaminated again during lifting. Prevent burns and mechanical accidents. Stop the extractor, and close the isolation valves for HV-1031 and the process gas from the waste boiler to the extractor. (8) Change the burner cooling water from a hose to a rigid pipe. After the flow rate, pressure of the burner cooling water and its operation become stable, check the operation of the cooling water circulation pump P-23101 to confirm it is functioning properly, and then activate the interlock for the burner cooling water system. (9) The process burners are ignited in logical sequence; once everything is functioning properly, a comprehensive check is carried out to ensure accuracy, after which interlocks for some of the burners are activated. (The activation of interlocks for flow rate, pressure, and temperature is subject to further consideration.) (10) The gas from the conversion tower, at the outlet PV-1223, is sent to the flare for discharge; as the temperature of the conversion furnace rises, attention should be paid to the gas generated by the waste heat boiler. It is necessary to maintain the liquid levels in both the waste heat boiler and the deoxygenation tank, and to closely monitor the operation of the boiler water circulation pump and the high-pressure boiler water pump. (11) Pay attention to the liquid level in the wash tower; start P-23101. An alternative plan is to use the gas generated by the waste boiler and connect it to the grid. (12) To ensure the safety, order, stability, and speed of the entire replacement process, simulations should be conducted in advance, along with the preparation of contingency plans and scenarios for potential accidents. (The minimum flow rates and pressures for the use of natural gas, oxygen, and process steam still need to be determined based on the minimum loads allowed by the compressors and converters; moreover, the rate at which load and pressure can be increased after the system is put into operation must be carefully considered.)