High temperature dry desulfurization system and method using multi regeneration reactor

A desulfurization system for removing sulfur included in a synthetic gas in a high temperature dry state, comprising:

• a desulfurization reactor for removing sulfur from the synthetic gas using a desulfurizing agent;
• a desulfurization cyclone for separating the synthetic gas and the desulfurizing agent discharged from the desulfurization reactor;
• a first regeneration reactor to be coupled to the desulfurization cyclone for regenerating the desulfurizing agent;
• a second regeneration reactor to be coupled to the desulfurization cyclone for regenerating the desulfurizing agent;
• a first oxidizing agent supply for injecting oxidizing agent into the first regeneration reactor, and a second oxidizing agent supply for injecting oxidizing agent into the second regeneration reactor;
• a first inlet valve coupled between the desulfurization cyclone and a first inlet of the first regeneration reactor, a first outlet valve at a first outlet of the first regeneration reactor, a second inlet valve coupled between the desulfurization cyclone and a second inlet of the second regeneration reactor, and a second outlet valve at a second outlet of the second regeneration reactor;
• a controller for operating one of the first regeneration reactor and the second regeneration reactor in a regeneration mode, and for operating the other regeneration reactor in a desulfurization mode by circulating the desulfurizing agent with the desulfurization reactor, when operating the first regeneration reactor in the regeneration mode, closing the first inlet valve and the first outlet valve, and operating the first oxidizing agent supply, when operating the second regeneration reactor in the regeneration mode, closing the second inlet valve and the second outlet valve, and operating the second oxidizing agent supply;
• a first regeneration cyclone for separating gas and solid discharged through a first recirculation outlet of the first regeneration reactor and recirculating the solid through a first recirculation inlet of the first regeneration reactor when the first regeneration reactor operates in the regeneration mode;
• a second regeneration cyclone for separating gas and solid discharged through a second recirculation outlet of the second regeneration reactor and recirculating the solid through a second recirculation inlet of the second regeneration reactor when the second regeneration reactor operates in the regeneration mode;
• a first measuring sensor for measuring whether oxygen is discharged by the first regeneration reactor when the first regeneration reactor operates in the regeneration mode;
• and
• a second measuring sensor for measuring whether oxygen is discharged by the second regeneration reactor when the second regeneration reactor operates in the regeneration mode;
• the controller for
• determining whether the regeneration mode of the first regeneration reactor has ended based on the first measuring sensor, and determining whether the regeneration mode of the second regeneration reactor has ended based on the second measuring sensor, and
• when the first regeneration reactor operates in the regeneration mode, gas including the desulfurizing agent is discharged by the first regeneration reactor and sulfur is flowed into the first regeneration cyclone, the desulfurization agent is discharged from the first outlet of the first regeneration cyclone and recirculates to the first regeneration reactor, and the gas including sulfur is flowed into a sulfur recovery reactor, when the second regeneration reactor operates in the regeneration mode, gas including the desulfurizing agent is discharged by the second regeneration reactor and sulfur is flowed into the second regeneration cyclone, the desulfurization agent is discharged from the second outlet of the second regeneration cyclone and recirculates to the second regeneration reactor, and the gas including sulfur is flowed into the sulfur recovery reactor.