Device for using high-temperature converter gas and increasing heat value and use method of device

Abstract

The invention relates to a device for using high-temperature converter gas and increasing the heat value. The device comprises a movable flue gas hood, a fixed flue, a carbon loss reactor, a water-cooling elbow and a dust removal tank; the movable flue gas hood is arranged above a converter; one end of the fixed flue is connected with the movable flue gas hood; the other end of the fixed flue is connected with the carbon loss reactor; the lower end of the carbon loss reactor is connected with the water-cooling elbow; the dust removal tank is arranged below the water-cooling elbow; a flue gas analysis meter is arranged at the tail of the water-cooling elbow; the carbon loss reactor is filled with one or more of coke, machine-pressed charcoal and semi-coke with the lumpiness not lower than 10 mm; and valves are mounted at the upper end and the lower end of the carbon loss reactor. A method is simple and easy to implement, the carbon loss reactor, is arranged on the basis of an original gasification cooling pipeline, the temperature of the high-temperature converter gas is reduced from 1,500-1,600 DEG C to 800-950 DEG C by the aid of the carbon loss reaction absorbing a large quantityof heat, meanwhile, CO is enriched, the content of CO in the converter gas is increased from 50%-70% to more than 80%, and subsequent application is facilitated.

Description

technical field [0001] The invention relates to the technical field of steelmaking converter gas utilization, in particular to a device for utilizing high-level converter gas and increasing the calorific value of the gas and a method for using the gas. Background technique [0002] During converter steelmaking, the 1500°C high-temperature flue gas generated is cooled to 850°C--1000°C by the gasification cooling flue and then enters the evaporative cooler. After coarse dust removal, it enters the electrostatic precipitator for fine dust removal. The working principle of the traditional steam dust removal is: the working principle of the evaporative cooler in the converter gas dry purification recovery system is to send water and gas to a specific two-phase flow nozzle in a certain proportion, and atomize it into fine steam-water mixture particles. Spray directly into the evaporative cooler, absorb heat and evaporate quickly, so that the high-temperature flue gas is cooled ra...

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Problems solved by technology

The above two methods of converter gas purification, cooling, and CO enrichment have solved the problems of high temperature converter gas, high temperature, dust, and low CO concentration. However, there are still certain problems. N 2 As a carrier gas, it affects the purity of the purified converter gas. At the same time, the gas reaction is too intense, which brings safety hazards, and the use of CO 2 CO enrichment in the absorbing liquid will have a great impact on environmental protection. At the same time, the chemical reaction heat application effect of high-temperature converter gas will not be very good. Therefore, we start from the perspective of reaction temperature higher than 1000°C and flue gas enrichment. Propose the method of built-in coke to reduce the temperature of converter flue gas and enrich CO

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