High temperature dry desulfurization system and method using multi regeneration rector

A desulfurization system removing sulfur ingredients included synthetic gas generated from gasification of coal in a high temperature dry state, comprising:

• a desulfurization reactor removing sulfur ingredients of the synthetic gas by desulfurizing agent;
• a desulfurization cyclone discharging by separating synthetic gas removed sulfur ingredients discharged in the desulfurization reactor and desulfurizing agent absorbed sulfur ingredients;
• at least one of a first regeneration reactor branched in the desulfurization cyclone and regenerates the desulfurizing agent absorbed the sulfur ingredients by flowing the desulfurizing agent absorbed the discharged sulfur ingredients;
• at least one of a second regeneration reactor branched in the desulfurization cyclone and regenerates the desulfurizing agent absorbed the sulfur ingredients by flowing the desulfurizing agent absorbed discharged sulfur ingredients;
• a first oxidizing agent supplying means injecting oxidizing agent to a first oxidizing agent inlet of the first regeneration reactor, and a second oxidizing agent supplying means injecting oxidizing agent to a second oxidizing agent inlet of the second regeneration reactor;
• a first inlet valve provided at a side of a first regeneration reactor inlet pipe connecting between the desulfurization cyclone and a first solid inlet of the first regeneration reactor, a first outlet valve provided at a first desulfurization outlet of the first regeneration reactor, a second inlet valve provided at a side of a second regeneration reactor inlet pipe connecting between the desulfurization cyclone and a second solid inlet of the second regeneration reactor, and a second outlet valve provided at a second desulfurization agent outlet of the second regeneration reactor;
• a controller operating one of the first regeneration reactor and the second regeneration reactor in a regeneration mode, controlling the other to operate in a desulfurization mode by circulating desulfurizing agent between the desulfurization reactors, in the case of operating the first regeneration reactor in the regeneration mode, closing the first inlet valve and the first outlet valve, operating the first oxidizing agent supplying means, in the case of operating the second regeneration reactor in a regeneration mode, closing the second inlet valve and the second outlet valve, controlling the second oxidizing agent supplying means to operate;
• a first regeneration cyclone 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 a regeneration mode;
• a second regeneration cyclone separating gas and solid discharged through a second recirculation outlet of the second regeneration reactor recirculating the solid through a second recirculation inlet of the second regeneration reactor when the second regeneration reactor operates in a regeneration mode;
• a first measuring sensor measuring whether oxygen is discharged in the first regeneration reactor when the first regeneration reactor operates in a regeneration mode;
• and comprising
• a second measuring sensor measuring whether oxygen is discharged in the second regeneration reactor when the first regeneration reactor operates in a regeneration mode,
• the controller,
• determines whether regeneration mode of the first regeneration reactor ceases based on measurement value of the first measuring sensor, and determines whether regeneration mode of the second regeneration reactor ceases based on measurement value of the second measuring sensor,
• in the case that the first regeneration reactor operates in the regeneration mode, gas including desulfurizing agent discharged in the first regeneration reactor and sulfur is flowed into the first regeneration cyclone, the desulfurization agent discharged in solid outlet of the first regeneration cyclone recirculates to the first regeneration reactor, the gas including sulfur is flowed into sulfur recovery reactor, in the case that the second regeneration reactor operates in the regeneration mode, gas including desulfurizing agent discharged in the second regeneration reactor and sulfur is flowed into the second regeneration cyclone, the desulfurization agent discharged in solid outlet of the second regeneration cyclone recirculates to the second regeneration reactor, the gas including sulfur is flowed into the sulfur recovery reactor.