Method for preparing methanol by sensible heat of blast furnace slag

Abstract

The invention belongs to the technical field of waste head and complementary energy recovery in iron and steel Industry, and in particular relates to a method for preparing methanol by sensible heat of blast furnace slag. The method comprises the following steps: blast furnace slag enters into a sensible heat recovery device; reactants enter into a grain slag packed bed to be preheated, and enter into a graining reactor when the temperature reaches 600 DEG C; the reactants enter into the graining reactor for reaction at 850 DEG C and at one barometric pressure to generate methanol. High temperature residual heat resources of liquid blast furnace slag are efficiently, economically and environment-friendlily used in an energy-saving manner. Treated blast furnace slag can meet the demand of cement manufacturing, and methanol produced belongs to a product widely applied with high additional value. Ternary reforming reaction of methane can realize part of self-heat supply, so that the energy efficiency in the reaction process is greatly enhanced, the cost is lowered, and carbon deposited on the surface of the catalyst can be alleviated or even eliminated. Coke oven gas resource is adequately utilized, the energy resource is saved, carbon dioxide in flue gas is utilized, and emission of greenhouse gases is reduced, so that the method is energy-saving and environment-friendly.

Description

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AI Technical Summary

Benefits of technology

This patented technology uses this type of material called Blast Furnace Slags (BF) with specific properties like its ability to absorb large amounts of water vapor during melting processes without losing it due to condensation from moisture present therein. These materials are commonly found at coal plants where they help produce more valuable products such as synthetic gypsum plasterboard. By treating these BFs properly, we aimed to create new ways to use them effectively while reducing environmental impact.

Problems solved by technology

This patents discusses current techniques for generating synthetic gas from mold combustion residue generated during manufacturing operations involving ironmaking, steel making, coking, electric arc melting, pulp mill processing, and plasma decomposition. Each technique involves reactants like sulfur compounds and nitrogen compound, leading to significant costs associated with coolant usage and disposable resources needed. Additionally, the existing systems require expensive materials and consume considerable amounts of energy due to their slow reaction rates.

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