Operation method of medium-pressure waste heat recovery device in start-up stage of crushed coal pressure gasification device

• Main Authors: JO JUN-HO, LI JINZHOU, LIU YUJIE, HOU LEILEI, ZHAO WEI, KANG SHUXIN, HOU YONGJUN
• Format: Patent
• Language: Chinese; English
• Published: 05.11.2021
• Subjects: CARBURETTING AIR OR OTHER GASES; CHEMISTRY; FUELS; LUBRICANTS; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROMSOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The invention belongs to the technical field of coal gasification, and discloses an operation method of a medium-pressure waste heat recovery device in the start-up stage of a crushed coal pressure gasification device. Before 4.5 MPa and 450 DEG C high-pressure steam is introduced into a crushed coal pressurized gasification furnace for pipe warming of a crushed coal pressurized gasification device, when 4.5 MPa and 450 DEG C high-pressure steam is introduced into the crushed coal pressurized gasification furnace for pipe warming of the crushed coal pressurized gasification device, when air ignition is performed on the crushed coal pressurized gasification device, and when oxygen cutting is performed on the crushed coal pressurized gasification device, the opening degree of related valves of the medium-pressure waste heat boiler and the steam pocket during grid connection of the gasification furnace enables high-temperature steam to be in slow contact with cold-state metal, so that a large amount of condensat