RU2012139762A - METHOD FOR GASIFICATION OF CARBON-CONTAINING SOLID FUELS - Google Patents

Abstract

A method of gasification of carbon-containing solid fuels, including heating, pyrolysis of carbon fuel supplied to a bath with molten slag of a sealed electrode electric furnace while passing gasification agents through the slag melt, as well as passing electric current, removing synthesis gas, slag and metal alloy from the furnace’s working space, characterized in that a three-phase electric current is passed through the slag melt, the value of which is determined in accordance with the consumption of solid fuel and taking into account the required power, determined from the expression: where G is the consumption of solid fuel in an electric furnace, kg / h; w is the specific consumption of necessary energy, determined by physical and mathematical modeling, which is equal to: for gasification of coal and use of vapor-oxygen as a gasification agent mixtures of 2.20 ... 2.356 M J / kg; for the gasification of brown coal and peat and the use of a vapor-oxygen mixture of 2.50 ... 2.83 MJ / kg as a gasification agent for gasification of coal and using 7.0 ... 7.23 MJ / kg of steam in the gasification process as a gasification agent; for gasification of brown coal and peat and using 5.0 ... 5.08 MJ / kg of steam as a gasifying agent in gasification; for stone gasification coal and the use of oxygen 0.20 ... 0.23 MJ / kg for gasification of brown coal and peat in the gasification process and the use of oxygen 0.08 ... 0.1 MJ / kg for gasification of brown coal and peat, and m is the number electrodes equal to 3; 3600 - conversion factor kg / h to kg / s (kg / s

Claims (1)

A method of gasification of carbon-containing solid fuels, including heating, pyrolysis of carbon fuel supplied to a bath with molten slag of a sealed electrode electric furnace while passing gasification agents through the slag melt, as well as passing electric current, removing synthesis gas, slag and metal alloy from the furnace’s working space, characterized in that a three-phase electric current is passed through the slag melt, the value of which is determined in accordance with the consumption of solid fuel and taking into account the capacity required, determined from the expression: $${\text{P}}_{\text{a}}=\frac{\text{G}\cdot {\text{w}}_{\text{e}}}{\text{3600}}\text{,}\text{MW}\text{,}$$

where G is the consumption of solid fuel in an electric furnace, kg / h; w _el - specific consumption of necessary electricity, determined by physical and mathematical modeling, equal to: for gasification of coal and use in the gasification process as a gasification agent, an oxygen-vapor mixture of 2.20 ... 2.356 M J / kg; during the gasification of brown coal and peat and the use of a gas-vapor mixture of 2.50 ... 2.83 MJ / kg as a gasifying agent in the gasification process; for gasification of coal and use of 7.0 ... 7.23 MJ / kg steam as a gasification agent in the gasification process; for gasification of brown coal and peat and the use of steam 5.0 ... 5.08 MJ / kg in the gasification process as a gasification agent; for gasification of coal and use of oxygen 0.20 ... 0.23 MJ / kg as a gasification agent in the gasification process for the gasification of brown coal and peat and the use of oxygen 0.08 ... 0.1 MJ / kg in the gasification process as a gasification agent m is the number of electrodes equal to 3; 3600 - conversion factor kg / h to kg / s (kg / s · MJ / kg = MJ / s = MW); 10 ⁶ - power conversion factor in watts, power per electrode $$P_{\mathrm{uh}a}=\frac{{10}^6{R}_{\mathrm{but}}{\eta }_{\mathrm{uh}l}}{m},$$

where m = 3; $${{\eta }^{\prime }}_{\mathrm{uh}l}$$

- electrical efficiency, then determine the amount of current per one electrode $$I=\frac{p_{\mathrm{uh}\mathrm{but}}^{\raisebox{1ex}{$2$}\!\left/ \!\raisebox{-1ex}{$3$}\right.}}{\mathrm{FROM}},$$

where C is the technological parameter, which is a complex characteristic of the electrotechnological regime of the installation of electrothermal gasification of solid fuels, the values of the parameter C determined by physical and mathematical modeling are 0.88 V / W ^1/3 for gasification of coal, 0.85 V for brown coal gasification / W ^1/3 . 3600 and 10 ⁶ - reduction factors: 3600 - conversion factor kg / h to kg / s (kg / s · MJ / kg = MJ / s = MW); 10 ⁶ - power conversion factor from megawatts to watts.