Converter gas dry method pocket type purification and recovery process and system

Abstract

The invention belongs to the technical field of gas purification, and discloses converter gas dry-method bag-type purification and recovery technology and a converter gas dry-method bag-type purification and recovery system. The technology comprises: a converter generates high-temperature ash-laden gas under the condition of oxygen blowing and smelting, and the temperature of the high-temperature ash-laden gas is reduced to be between 800 and 1,000 DEG C by a vapourization cooling system; the ash-laden gas enters an evaporative cooler through an expansion joint and is atomized and cooled by a two-phase injection device which is formed by vapor or nitrogen and water, and the temperature of the gas is reduced to be approximately 200 DEG C; the gas enters a bag-type duster for filtration and purification; and purified gas is subjected to switching control by a three-way switch valve according to gas recovery conditions of the system, and is recovered or discharged respectively. The invention has the advantages that the technology has high gas purification efficiency, and the system has low running resistance, energy consumption, operating cost and maintenance cost and no secondary pollution such as sewage. The technology is novel energy-saving and environment-friendly technology with wide promotion value, and can be widely applied to the converter gas purification and recovery system.

Description

technical field [0001] The invention belongs to the technical field of gas purification. The invention relates to the gas purification produced in the steelmaking process of the iron and steel industry, discloses a converter gas purification and recovery process and system, and particularly relates to a converter gas dry method bag type purification Recycling processes and systems. Background technique [0002] The temperature of the converter gas at the furnace mouth of the converter is 1450-1650°C, after being cooled to 800-1000°C by the vaporization cooling system, it enters the purification and recovery system. At present, there are two main types of converter gas purification and recovery processes: wet method and dry method (abbreviated as LT). The wet process mainly includes two types of text one tower (abbreviated as OG) and circular seam washing (abbreviated as RSW). [0003] The wet OG purification system is mainly composed of a two-stage Venturi tube purificatio...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a purification and recovery process and system, which solves the problems of high dust discharge dust concentration in wet OG and high energy consumption of the system as in wet RSW, large system resistance and sewage treatment. , which solves the problems of high investment, unstable system operation and high operation and maintenance costs of dry LT; its dust emission dust concentration is less than 10mg / m 3 (standard condition)

Images