Converter gas direct combustion heat energy recovery and purification system and process

Abstract

The invention relates to a converter gas direct combustion heat energy recovery and purification system and process. The technical scheme adopted is: the water-cooled flue gas recovery hood is connected with the primary vaporization cooling flue, the CO\O2 analyzer is installed on the primary vaporization cooling flue, the outlet of the primary vaporization cooling flue is connected with the combustion settling chamber, and the combustion settling chamber is equipped with Ignition device, combustion settling chamber with combustion-supporting air supply device, combustion settling chamber outlet connected with secondary vaporization cooling flue, secondary vaporization cooling flue outlet connected with waste heat boiler, waste heat boiler outlet connected with bag filter, bag filter outlet connected with induced draft fan And the motor, the induced draft fan and the motor adjust the rotation speed through the frequency converter, and the outlet of the induced draft fan is connected to the chimney. The invention can recover the heat energy released by the direct combustion of CO in the converter gas and the heat energy in the flue gas, and the flue gas after the heat energy recovery can be purified, and the system equipment has simple structure, high safety performance and good dust removal effect.

Description

technical field [0001] The invention relates to a direct combustion heat energy recovery and purification system and process aimed at the recovery and utilization of converter flue gas. Background technique [0002] Converter steelmaking is divided into several stages such as charging, oxygen blowing smelting, deoxidizing steel tapping, slag splashing to protect the furnace, and slag dumping. Each stage produces a large amount of high-temperature flue gas, especially in the flue gas generated in the oxygen blowing smelting stage. Contains a large amount of CO, its concentration can reach 60-80%. Currently, converter gas purification and utilization methods mainly include: OG wet gas purification recovery process, converter gas dry electrostatic precipitator purification recovery process and converter gas dry bag dust removal purification recovery process. In the process of OG wet dust removal, purification and recovery, water is used to wash the gas, which produces a large ...

AI Technical Summary

Problems solved by technology

In the process of OG wet dust removal, purification and recovery, water is used to wash the gas, which produces a large amount of waste water, and the gas contains a large amount of water vapor, which reduces the combustion temperature of the gas. The heat energy of this stage cannot be recovered

Converter gas dry electrostatic precipitator purification and recovery process requires spraying a large amount of water and nitrogen into the atomization cooler, and a large amount of heat energy is absorbed by the water. The saturated water vapor in the converter gas entering the electrostatic precipitator increases, and the volume of the gas increases. The high-voltage electric field on the electrostatic precipitator is easy to generate electric sparks, and when the oxygen and gas are mixed to a certain ratio, it is easy to explode, the safety performance is poor, and the latent heat in the flue gas cannot be recovered

The converter gas heat energy recovery dry bag purification recovery process cannot recover the heat energy in the flue gas in the whole process. The heat energy in the early and late stages of blowing, deoxidation tapping, slag splashing and furnace protection cannot be recovered. The dust collector needs to be based on the gas Design, manufacture and install dust collectors

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