Catalytic start-up of the boiler

15.2 Boiler scope 1: External heat exchanger drum V1401. 2. Slurry steam generator drum V1402. 3. The steam drum V1403 of the steam generator in No. 2 Middle School. 4. Waste heat boiler drum. 15.3 Boiling method: An appropriate amount of chemicals (such as NaOH and Na3PO4) is added to the boiler water to create an alkaline environment. This enables saponification of substances like oil deposits inside the boiler, resulting in the formation of sediment. These sediments separate from the metal surface in the boiling water and settle at the bottom of the steam drum, where they are eventually removed through the blowdown pipe. Na3PO4 and H2O also produce P2O5 in the furnace water, forming a protective layer inside the furnace tubes to prevent corrosion and erosion. 15.4 Schedule 1. The boiling of the steam drum V1401 of the external heat exchanger, as well as the lining drying of this external heat exchanger, can be carried out simultaneously with the lining drying of the regenerator. Hot air or flue gas from the regenerator is used for this purpose; once the temperature of the external heat exchanger reaches 150°C, deoxygenated water is introduced to start the boiling process. 2. The boiler cleaning of the oil slurry steam generator drum V1402 is carried out after the plant is put into operation, utilizing the heat from the oil slurry steam generator (E1216AC) for this purpose. Previously, a 3.5MPa steam purging operation was carried out, with venting at the outlet flange of V1402. 3. The boiler cleaning of the steam drum V1403 in the No. 2 steam generator is carried out after the plant is put into operation, utilizing the heat from the No. 2 steam generator (E1217) for this purpose. Previously, a 3.5 MPa steam purge was carried out, with venting at the outlet flange of V1403. 4. The boiling-out of the steam drum of the waste heat boiler, as well as the drying of the waste heat boiler, can be carried out simultaneously with the lining drying of the regenerator, using the hot air or flue gas from the regenerator for this purpose. Start passing the flue gas through the waste heat boiler; the flue gas inlet temperature of the waste heat boiler should not exceed 343°C.